c2170eeffa
Add new methods to gdbarch for analyzing the instruction at a given address. Implement those methods for i386 and amd64 architectures. This is needed by "record btrace" to detect function calls in the execution trace. 2014-01-16 Markus Metzger <markus.t.metzger@intel.com> * amd64-tdep.c (amd64_classify_insn_at, amd64_insn_is_call) (amd64_insn_is_ret, amd64_insn_is_jump, amd64_jmp_p): New. (amd64_init_abi): Add insn_is_call, insn_is_ret, and insn_is_jump to gdbarch. * i386-tdep.c (i386_insn_is_call, i386_insn_is_ret) (i386_insn_is_jump, i386_jmp_p): New. (i386_gdbarch_init): Add insn_is_call, insn_is_ret, and insn_is_jump to gdbarch. * gdbarch.sh (insn_is_call, insn_is_ret, insn_is_jump): New. * gdbarch.h: Regenerated. * gdbarch.c: Regenerated. * arch-utils.h (default_insn_is_call, default_insn_is_ret) (default_insn_is_jump): New. * arch-utils.c (default_insn_is_call, default_insn_is_ret) (default_insn_is_jump): New.
8230 lines
223 KiB
C
8230 lines
223 KiB
C
/* Intel 386 target-dependent stuff.
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Copyright (C) 1988-2014 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "opcode/i386.h"
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#include "arch-utils.h"
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#include "command.h"
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#include "dummy-frame.h"
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#include "dwarf2-frame.h"
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#include "doublest.h"
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#include "frame.h"
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#include "frame-base.h"
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#include "frame-unwind.h"
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#include "inferior.h"
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#include "gdbcmd.h"
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#include "gdbcore.h"
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#include "gdbtypes.h"
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#include "objfiles.h"
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#include "osabi.h"
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#include "regcache.h"
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#include "reggroups.h"
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#include "regset.h"
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#include "symfile.h"
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#include "symtab.h"
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#include "target.h"
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#include "value.h"
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#include "dis-asm.h"
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#include "disasm.h"
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#include "remote.h"
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#include "exceptions.h"
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#include "gdb_assert.h"
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#include <string.h>
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#include "i386-tdep.h"
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#include "i387-tdep.h"
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#include "i386-xstate.h"
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#include "record.h"
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#include "record-full.h"
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#include <stdint.h>
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#include "features/i386/i386.c"
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#include "features/i386/i386-avx.c"
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#include "features/i386/i386-mpx.c"
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#include "features/i386/i386-mmx.c"
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#include "ax.h"
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#include "ax-gdb.h"
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#include "stap-probe.h"
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#include "user-regs.h"
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#include "cli/cli-utils.h"
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#include "expression.h"
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#include "parser-defs.h"
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#include <ctype.h>
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/* Register names. */
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static const char *i386_register_names[] =
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{
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"eax", "ecx", "edx", "ebx",
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"esp", "ebp", "esi", "edi",
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"eip", "eflags", "cs", "ss",
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"ds", "es", "fs", "gs",
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"st0", "st1", "st2", "st3",
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"st4", "st5", "st6", "st7",
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"fctrl", "fstat", "ftag", "fiseg",
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"fioff", "foseg", "fooff", "fop",
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"xmm0", "xmm1", "xmm2", "xmm3",
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"xmm4", "xmm5", "xmm6", "xmm7",
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"mxcsr"
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};
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static const char *i386_ymm_names[] =
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{
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"ymm0", "ymm1", "ymm2", "ymm3",
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"ymm4", "ymm5", "ymm6", "ymm7",
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};
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static const char *i386_ymmh_names[] =
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{
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"ymm0h", "ymm1h", "ymm2h", "ymm3h",
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"ymm4h", "ymm5h", "ymm6h", "ymm7h",
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};
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static const char *i386_mpx_names[] =
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{
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"bnd0raw", "bnd1raw", "bnd2raw", "bnd3raw", "bndcfgu", "bndstatus"
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};
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/* Register names for MPX pseudo-registers. */
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static const char *i386_bnd_names[] =
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{
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"bnd0", "bnd1", "bnd2", "bnd3"
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};
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/* Register names for MMX pseudo-registers. */
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static const char *i386_mmx_names[] =
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{
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"mm0", "mm1", "mm2", "mm3",
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"mm4", "mm5", "mm6", "mm7"
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};
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/* Register names for byte pseudo-registers. */
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static const char *i386_byte_names[] =
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{
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"al", "cl", "dl", "bl",
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"ah", "ch", "dh", "bh"
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};
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/* Register names for word pseudo-registers. */
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static const char *i386_word_names[] =
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{
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"ax", "cx", "dx", "bx",
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"", "bp", "si", "di"
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};
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/* MMX register? */
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static int
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i386_mmx_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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int mm0_regnum = tdep->mm0_regnum;
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if (mm0_regnum < 0)
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return 0;
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regnum -= mm0_regnum;
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return regnum >= 0 && regnum < tdep->num_mmx_regs;
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}
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/* Byte register? */
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int
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i386_byte_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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regnum -= tdep->al_regnum;
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return regnum >= 0 && regnum < tdep->num_byte_regs;
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}
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/* Word register? */
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int
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i386_word_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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regnum -= tdep->ax_regnum;
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return regnum >= 0 && regnum < tdep->num_word_regs;
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}
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/* Dword register? */
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int
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i386_dword_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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int eax_regnum = tdep->eax_regnum;
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if (eax_regnum < 0)
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return 0;
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regnum -= eax_regnum;
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return regnum >= 0 && regnum < tdep->num_dword_regs;
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}
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static int
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i386_ymmh_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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int ymm0h_regnum = tdep->ymm0h_regnum;
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if (ymm0h_regnum < 0)
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return 0;
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regnum -= ymm0h_regnum;
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return regnum >= 0 && regnum < tdep->num_ymm_regs;
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}
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/* AVX register? */
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int
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i386_ymm_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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int ymm0_regnum = tdep->ymm0_regnum;
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if (ymm0_regnum < 0)
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return 0;
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regnum -= ymm0_regnum;
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return regnum >= 0 && regnum < tdep->num_ymm_regs;
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}
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/* BND register? */
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int
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i386_bnd_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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int bnd0_regnum = tdep->bnd0_regnum;
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if (bnd0_regnum < 0)
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return 0;
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regnum -= bnd0_regnum;
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return regnum >= 0 && regnum < I387_NUM_BND_REGS;
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}
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/* SSE register? */
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int
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i386_xmm_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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int num_xmm_regs = I387_NUM_XMM_REGS (tdep);
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if (num_xmm_regs == 0)
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return 0;
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regnum -= I387_XMM0_REGNUM (tdep);
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return regnum >= 0 && regnum < num_xmm_regs;
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}
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static int
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i386_mxcsr_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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if (I387_NUM_XMM_REGS (tdep) == 0)
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return 0;
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return (regnum == I387_MXCSR_REGNUM (tdep));
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}
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/* FP register? */
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int
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i386_fp_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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if (I387_ST0_REGNUM (tdep) < 0)
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return 0;
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return (I387_ST0_REGNUM (tdep) <= regnum
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&& regnum < I387_FCTRL_REGNUM (tdep));
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}
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int
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i386_fpc_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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if (I387_ST0_REGNUM (tdep) < 0)
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return 0;
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return (I387_FCTRL_REGNUM (tdep) <= regnum
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&& regnum < I387_XMM0_REGNUM (tdep));
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}
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/* BNDr (raw) register? */
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static int
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i386_bndr_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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if (I387_BND0R_REGNUM (tdep) < 0)
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return 0;
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regnum -= tdep->bnd0r_regnum;
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return regnum >= 0 && regnum < I387_NUM_BND_REGS;
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}
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/* BND control register? */
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static int
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i386_mpx_ctrl_regnum_p (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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if (I387_BNDCFGU_REGNUM (tdep) < 0)
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return 0;
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regnum -= I387_BNDCFGU_REGNUM (tdep);
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return regnum >= 0 && regnum < I387_NUM_MPX_CTRL_REGS;
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}
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/* Return the name of register REGNUM, or the empty string if it is
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an anonymous register. */
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static const char *
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i386_register_name (struct gdbarch *gdbarch, int regnum)
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{
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/* Hide the upper YMM registers. */
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if (i386_ymmh_regnum_p (gdbarch, regnum))
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return "";
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return tdesc_register_name (gdbarch, regnum);
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}
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/* Return the name of register REGNUM. */
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const char *
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i386_pseudo_register_name (struct gdbarch *gdbarch, int regnum)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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if (i386_bnd_regnum_p (gdbarch, regnum))
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return i386_bnd_names[regnum - tdep->bnd0_regnum];
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if (i386_mmx_regnum_p (gdbarch, regnum))
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return i386_mmx_names[regnum - I387_MM0_REGNUM (tdep)];
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else if (i386_ymm_regnum_p (gdbarch, regnum))
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return i386_ymm_names[regnum - tdep->ymm0_regnum];
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else if (i386_byte_regnum_p (gdbarch, regnum))
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return i386_byte_names[regnum - tdep->al_regnum];
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else if (i386_word_regnum_p (gdbarch, regnum))
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return i386_word_names[regnum - tdep->ax_regnum];
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internal_error (__FILE__, __LINE__, _("invalid regnum"));
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}
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/* Convert a dbx register number REG to the appropriate register
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number used by GDB. */
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static int
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i386_dbx_reg_to_regnum (struct gdbarch *gdbarch, int reg)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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/* This implements what GCC calls the "default" register map
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(dbx_register_map[]). */
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if (reg >= 0 && reg <= 7)
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{
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/* General-purpose registers. The debug info calls %ebp
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register 4, and %esp register 5. */
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if (reg == 4)
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return 5;
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else if (reg == 5)
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return 4;
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else return reg;
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}
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else if (reg >= 12 && reg <= 19)
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{
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/* Floating-point registers. */
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return reg - 12 + I387_ST0_REGNUM (tdep);
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}
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else if (reg >= 21 && reg <= 28)
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{
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/* SSE registers. */
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int ymm0_regnum = tdep->ymm0_regnum;
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if (ymm0_regnum >= 0
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&& i386_xmm_regnum_p (gdbarch, reg))
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return reg - 21 + ymm0_regnum;
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else
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return reg - 21 + I387_XMM0_REGNUM (tdep);
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}
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else if (reg >= 29 && reg <= 36)
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{
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/* MMX registers. */
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return reg - 29 + I387_MM0_REGNUM (tdep);
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}
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/* This will hopefully provoke a warning. */
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return gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch);
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}
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/* Convert SVR4 register number REG to the appropriate register number
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used by GDB. */
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static int
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i386_svr4_reg_to_regnum (struct gdbarch *gdbarch, int reg)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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/* This implements the GCC register map that tries to be compatible
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with the SVR4 C compiler for DWARF (svr4_dbx_register_map[]). */
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/* The SVR4 register numbering includes %eip and %eflags, and
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numbers the floating point registers differently. */
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if (reg >= 0 && reg <= 9)
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{
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/* General-purpose registers. */
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return reg;
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}
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else if (reg >= 11 && reg <= 18)
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{
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/* Floating-point registers. */
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return reg - 11 + I387_ST0_REGNUM (tdep);
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}
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else if (reg >= 21 && reg <= 36)
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{
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/* The SSE and MMX registers have the same numbers as with dbx. */
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return i386_dbx_reg_to_regnum (gdbarch, reg);
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}
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switch (reg)
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{
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case 37: return I387_FCTRL_REGNUM (tdep);
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case 38: return I387_FSTAT_REGNUM (tdep);
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case 39: return I387_MXCSR_REGNUM (tdep);
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case 40: return I386_ES_REGNUM;
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case 41: return I386_CS_REGNUM;
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case 42: return I386_SS_REGNUM;
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case 43: return I386_DS_REGNUM;
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case 44: return I386_FS_REGNUM;
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case 45: return I386_GS_REGNUM;
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}
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/* This will hopefully provoke a warning. */
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return gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch);
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}
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/* This is the variable that is set with "set disassembly-flavor", and
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its legitimate values. */
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static const char att_flavor[] = "att";
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static const char intel_flavor[] = "intel";
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static const char *const valid_flavors[] =
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{
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att_flavor,
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intel_flavor,
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NULL
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};
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static const char *disassembly_flavor = att_flavor;
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/* Use the program counter to determine the contents and size of a
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breakpoint instruction. Return a pointer to a string of bytes that
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encode a breakpoint instruction, store the length of the string in
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*LEN and optionally adjust *PC to point to the correct memory
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location for inserting the breakpoint.
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On the i386 we have a single breakpoint that fits in a single byte
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and can be inserted anywhere.
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This function is 64-bit safe. */
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static const gdb_byte *
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i386_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pc, int *len)
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{
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static gdb_byte break_insn[] = { 0xcc }; /* int 3 */
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*len = sizeof (break_insn);
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return break_insn;
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}
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/* Displaced instruction handling. */
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/* Skip the legacy instruction prefixes in INSN.
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Not all prefixes are valid for any particular insn
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but we needn't care, the insn will fault if it's invalid.
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The result is a pointer to the first opcode byte,
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or NULL if we run off the end of the buffer. */
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static gdb_byte *
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i386_skip_prefixes (gdb_byte *insn, size_t max_len)
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{
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gdb_byte *end = insn + max_len;
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while (insn < end)
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{
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switch (*insn)
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{
|
||
case DATA_PREFIX_OPCODE:
|
||
case ADDR_PREFIX_OPCODE:
|
||
case CS_PREFIX_OPCODE:
|
||
case DS_PREFIX_OPCODE:
|
||
case ES_PREFIX_OPCODE:
|
||
case FS_PREFIX_OPCODE:
|
||
case GS_PREFIX_OPCODE:
|
||
case SS_PREFIX_OPCODE:
|
||
case LOCK_PREFIX_OPCODE:
|
||
case REPE_PREFIX_OPCODE:
|
||
case REPNE_PREFIX_OPCODE:
|
||
++insn;
|
||
continue;
|
||
default:
|
||
return insn;
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static int
|
||
i386_absolute_jmp_p (const gdb_byte *insn)
|
||
{
|
||
/* jmp far (absolute address in operand). */
|
||
if (insn[0] == 0xea)
|
||
return 1;
|
||
|
||
if (insn[0] == 0xff)
|
||
{
|
||
/* jump near, absolute indirect (/4). */
|
||
if ((insn[1] & 0x38) == 0x20)
|
||
return 1;
|
||
|
||
/* jump far, absolute indirect (/5). */
|
||
if ((insn[1] & 0x38) == 0x28)
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Return non-zero if INSN is a jump, zero otherwise. */
|
||
|
||
static int
|
||
i386_jmp_p (const gdb_byte *insn)
|
||
{
|
||
/* jump short, relative. */
|
||
if (insn[0] == 0xeb)
|
||
return 1;
|
||
|
||
/* jump near, relative. */
|
||
if (insn[0] == 0xe9)
|
||
return 1;
|
||
|
||
return i386_absolute_jmp_p (insn);
|
||
}
|
||
|
||
static int
|
||
i386_absolute_call_p (const gdb_byte *insn)
|
||
{
|
||
/* call far, absolute. */
|
||
if (insn[0] == 0x9a)
|
||
return 1;
|
||
|
||
if (insn[0] == 0xff)
|
||
{
|
||
/* Call near, absolute indirect (/2). */
|
||
if ((insn[1] & 0x38) == 0x10)
|
||
return 1;
|
||
|
||
/* Call far, absolute indirect (/3). */
|
||
if ((insn[1] & 0x38) == 0x18)
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
i386_ret_p (const gdb_byte *insn)
|
||
{
|
||
switch (insn[0])
|
||
{
|
||
case 0xc2: /* ret near, pop N bytes. */
|
||
case 0xc3: /* ret near */
|
||
case 0xca: /* ret far, pop N bytes. */
|
||
case 0xcb: /* ret far */
|
||
case 0xcf: /* iret */
|
||
return 1;
|
||
|
||
default:
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
static int
|
||
i386_call_p (const gdb_byte *insn)
|
||
{
|
||
if (i386_absolute_call_p (insn))
|
||
return 1;
|
||
|
||
/* call near, relative. */
|
||
if (insn[0] == 0xe8)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Return non-zero if INSN is a system call, and set *LENGTHP to its
|
||
length in bytes. Otherwise, return zero. */
|
||
|
||
static int
|
||
i386_syscall_p (const gdb_byte *insn, int *lengthp)
|
||
{
|
||
/* Is it 'int $0x80'? */
|
||
if ((insn[0] == 0xcd && insn[1] == 0x80)
|
||
/* Or is it 'sysenter'? */
|
||
|| (insn[0] == 0x0f && insn[1] == 0x34)
|
||
/* Or is it 'syscall'? */
|
||
|| (insn[0] == 0x0f && insn[1] == 0x05))
|
||
{
|
||
*lengthp = 2;
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* The gdbarch insn_is_call method. */
|
||
|
||
static int
|
||
i386_insn_is_call (struct gdbarch *gdbarch, CORE_ADDR addr)
|
||
{
|
||
gdb_byte buf[I386_MAX_INSN_LEN], *insn;
|
||
|
||
read_code (addr, buf, I386_MAX_INSN_LEN);
|
||
insn = i386_skip_prefixes (buf, I386_MAX_INSN_LEN);
|
||
|
||
return i386_call_p (insn);
|
||
}
|
||
|
||
/* The gdbarch insn_is_ret method. */
|
||
|
||
static int
|
||
i386_insn_is_ret (struct gdbarch *gdbarch, CORE_ADDR addr)
|
||
{
|
||
gdb_byte buf[I386_MAX_INSN_LEN], *insn;
|
||
|
||
read_code (addr, buf, I386_MAX_INSN_LEN);
|
||
insn = i386_skip_prefixes (buf, I386_MAX_INSN_LEN);
|
||
|
||
return i386_ret_p (insn);
|
||
}
|
||
|
||
/* The gdbarch insn_is_jump method. */
|
||
|
||
static int
|
||
i386_insn_is_jump (struct gdbarch *gdbarch, CORE_ADDR addr)
|
||
{
|
||
gdb_byte buf[I386_MAX_INSN_LEN], *insn;
|
||
|
||
read_code (addr, buf, I386_MAX_INSN_LEN);
|
||
insn = i386_skip_prefixes (buf, I386_MAX_INSN_LEN);
|
||
|
||
return i386_jmp_p (insn);
|
||
}
|
||
|
||
/* Some kernels may run one past a syscall insn, so we have to cope.
|
||
Otherwise this is just simple_displaced_step_copy_insn. */
|
||
|
||
struct displaced_step_closure *
|
||
i386_displaced_step_copy_insn (struct gdbarch *gdbarch,
|
||
CORE_ADDR from, CORE_ADDR to,
|
||
struct regcache *regs)
|
||
{
|
||
size_t len = gdbarch_max_insn_length (gdbarch);
|
||
gdb_byte *buf = xmalloc (len);
|
||
|
||
read_memory (from, buf, len);
|
||
|
||
/* GDB may get control back after the insn after the syscall.
|
||
Presumably this is a kernel bug.
|
||
If this is a syscall, make sure there's a nop afterwards. */
|
||
{
|
||
int syscall_length;
|
||
gdb_byte *insn;
|
||
|
||
insn = i386_skip_prefixes (buf, len);
|
||
if (insn != NULL && i386_syscall_p (insn, &syscall_length))
|
||
insn[syscall_length] = NOP_OPCODE;
|
||
}
|
||
|
||
write_memory (to, buf, len);
|
||
|
||
if (debug_displaced)
|
||
{
|
||
fprintf_unfiltered (gdb_stdlog, "displaced: copy %s->%s: ",
|
||
paddress (gdbarch, from), paddress (gdbarch, to));
|
||
displaced_step_dump_bytes (gdb_stdlog, buf, len);
|
||
}
|
||
|
||
return (struct displaced_step_closure *) buf;
|
||
}
|
||
|
||
/* Fix up the state of registers and memory after having single-stepped
|
||
a displaced instruction. */
|
||
|
||
void
|
||
i386_displaced_step_fixup (struct gdbarch *gdbarch,
|
||
struct displaced_step_closure *closure,
|
||
CORE_ADDR from, CORE_ADDR to,
|
||
struct regcache *regs)
|
||
{
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
|
||
/* The offset we applied to the instruction's address.
|
||
This could well be negative (when viewed as a signed 32-bit
|
||
value), but ULONGEST won't reflect that, so take care when
|
||
applying it. */
|
||
ULONGEST insn_offset = to - from;
|
||
|
||
/* Since we use simple_displaced_step_copy_insn, our closure is a
|
||
copy of the instruction. */
|
||
gdb_byte *insn = (gdb_byte *) closure;
|
||
/* The start of the insn, needed in case we see some prefixes. */
|
||
gdb_byte *insn_start = insn;
|
||
|
||
if (debug_displaced)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"displaced: fixup (%s, %s), "
|
||
"insn = 0x%02x 0x%02x ...\n",
|
||
paddress (gdbarch, from), paddress (gdbarch, to),
|
||
insn[0], insn[1]);
|
||
|
||
/* The list of issues to contend with here is taken from
|
||
resume_execution in arch/i386/kernel/kprobes.c, Linux 2.6.20.
|
||
Yay for Free Software! */
|
||
|
||
/* Relocate the %eip, if necessary. */
|
||
|
||
/* The instruction recognizers we use assume any leading prefixes
|
||
have been skipped. */
|
||
{
|
||
/* This is the size of the buffer in closure. */
|
||
size_t max_insn_len = gdbarch_max_insn_length (gdbarch);
|
||
gdb_byte *opcode = i386_skip_prefixes (insn, max_insn_len);
|
||
/* If there are too many prefixes, just ignore the insn.
|
||
It will fault when run. */
|
||
if (opcode != NULL)
|
||
insn = opcode;
|
||
}
|
||
|
||
/* Except in the case of absolute or indirect jump or call
|
||
instructions, or a return instruction, the new eip is relative to
|
||
the displaced instruction; make it relative. Well, signal
|
||
handler returns don't need relocation either, but we use the
|
||
value of %eip to recognize those; see below. */
|
||
if (! i386_absolute_jmp_p (insn)
|
||
&& ! i386_absolute_call_p (insn)
|
||
&& ! i386_ret_p (insn))
|
||
{
|
||
ULONGEST orig_eip;
|
||
int insn_len;
|
||
|
||
regcache_cooked_read_unsigned (regs, I386_EIP_REGNUM, &orig_eip);
|
||
|
||
/* A signal trampoline system call changes the %eip, resuming
|
||
execution of the main program after the signal handler has
|
||
returned. That makes them like 'return' instructions; we
|
||
shouldn't relocate %eip.
|
||
|
||
But most system calls don't, and we do need to relocate %eip.
|
||
|
||
Our heuristic for distinguishing these cases: if stepping
|
||
over the system call instruction left control directly after
|
||
the instruction, the we relocate --- control almost certainly
|
||
doesn't belong in the displaced copy. Otherwise, we assume
|
||
the instruction has put control where it belongs, and leave
|
||
it unrelocated. Goodness help us if there are PC-relative
|
||
system calls. */
|
||
if (i386_syscall_p (insn, &insn_len)
|
||
&& orig_eip != to + (insn - insn_start) + insn_len
|
||
/* GDB can get control back after the insn after the syscall.
|
||
Presumably this is a kernel bug.
|
||
i386_displaced_step_copy_insn ensures its a nop,
|
||
we add one to the length for it. */
|
||
&& orig_eip != to + (insn - insn_start) + insn_len + 1)
|
||
{
|
||
if (debug_displaced)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"displaced: syscall changed %%eip; "
|
||
"not relocating\n");
|
||
}
|
||
else
|
||
{
|
||
ULONGEST eip = (orig_eip - insn_offset) & 0xffffffffUL;
|
||
|
||
/* If we just stepped over a breakpoint insn, we don't backup
|
||
the pc on purpose; this is to match behaviour without
|
||
stepping. */
|
||
|
||
regcache_cooked_write_unsigned (regs, I386_EIP_REGNUM, eip);
|
||
|
||
if (debug_displaced)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"displaced: "
|
||
"relocated %%eip from %s to %s\n",
|
||
paddress (gdbarch, orig_eip),
|
||
paddress (gdbarch, eip));
|
||
}
|
||
}
|
||
|
||
/* If the instruction was PUSHFL, then the TF bit will be set in the
|
||
pushed value, and should be cleared. We'll leave this for later,
|
||
since GDB already messes up the TF flag when stepping over a
|
||
pushfl. */
|
||
|
||
/* If the instruction was a call, the return address now atop the
|
||
stack is the address following the copied instruction. We need
|
||
to make it the address following the original instruction. */
|
||
if (i386_call_p (insn))
|
||
{
|
||
ULONGEST esp;
|
||
ULONGEST retaddr;
|
||
const ULONGEST retaddr_len = 4;
|
||
|
||
regcache_cooked_read_unsigned (regs, I386_ESP_REGNUM, &esp);
|
||
retaddr = read_memory_unsigned_integer (esp, retaddr_len, byte_order);
|
||
retaddr = (retaddr - insn_offset) & 0xffffffffUL;
|
||
write_memory_unsigned_integer (esp, retaddr_len, byte_order, retaddr);
|
||
|
||
if (debug_displaced)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"displaced: relocated return addr at %s to %s\n",
|
||
paddress (gdbarch, esp),
|
||
paddress (gdbarch, retaddr));
|
||
}
|
||
}
|
||
|
||
static void
|
||
append_insns (CORE_ADDR *to, ULONGEST len, const gdb_byte *buf)
|
||
{
|
||
target_write_memory (*to, buf, len);
|
||
*to += len;
|
||
}
|
||
|
||
static void
|
||
i386_relocate_instruction (struct gdbarch *gdbarch,
|
||
CORE_ADDR *to, CORE_ADDR oldloc)
|
||
{
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
gdb_byte buf[I386_MAX_INSN_LEN];
|
||
int offset = 0, rel32, newrel;
|
||
int insn_length;
|
||
gdb_byte *insn = buf;
|
||
|
||
read_memory (oldloc, buf, I386_MAX_INSN_LEN);
|
||
|
||
insn_length = gdb_buffered_insn_length (gdbarch, insn,
|
||
I386_MAX_INSN_LEN, oldloc);
|
||
|
||
/* Get past the prefixes. */
|
||
insn = i386_skip_prefixes (insn, I386_MAX_INSN_LEN);
|
||
|
||
/* Adjust calls with 32-bit relative addresses as push/jump, with
|
||
the address pushed being the location where the original call in
|
||
the user program would return to. */
|
||
if (insn[0] == 0xe8)
|
||
{
|
||
gdb_byte push_buf[16];
|
||
unsigned int ret_addr;
|
||
|
||
/* Where "ret" in the original code will return to. */
|
||
ret_addr = oldloc + insn_length;
|
||
push_buf[0] = 0x68; /* pushq $... */
|
||
store_unsigned_integer (&push_buf[1], 4, byte_order, ret_addr);
|
||
/* Push the push. */
|
||
append_insns (to, 5, push_buf);
|
||
|
||
/* Convert the relative call to a relative jump. */
|
||
insn[0] = 0xe9;
|
||
|
||
/* Adjust the destination offset. */
|
||
rel32 = extract_signed_integer (insn + 1, 4, byte_order);
|
||
newrel = (oldloc - *to) + rel32;
|
||
store_signed_integer (insn + 1, 4, byte_order, newrel);
|
||
|
||
if (debug_displaced)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"Adjusted insn rel32=%s at %s to"
|
||
" rel32=%s at %s\n",
|
||
hex_string (rel32), paddress (gdbarch, oldloc),
|
||
hex_string (newrel), paddress (gdbarch, *to));
|
||
|
||
/* Write the adjusted jump into its displaced location. */
|
||
append_insns (to, 5, insn);
|
||
return;
|
||
}
|
||
|
||
/* Adjust jumps with 32-bit relative addresses. Calls are already
|
||
handled above. */
|
||
if (insn[0] == 0xe9)
|
||
offset = 1;
|
||
/* Adjust conditional jumps. */
|
||
else if (insn[0] == 0x0f && (insn[1] & 0xf0) == 0x80)
|
||
offset = 2;
|
||
|
||
if (offset)
|
||
{
|
||
rel32 = extract_signed_integer (insn + offset, 4, byte_order);
|
||
newrel = (oldloc - *to) + rel32;
|
||
store_signed_integer (insn + offset, 4, byte_order, newrel);
|
||
if (debug_displaced)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"Adjusted insn rel32=%s at %s to"
|
||
" rel32=%s at %s\n",
|
||
hex_string (rel32), paddress (gdbarch, oldloc),
|
||
hex_string (newrel), paddress (gdbarch, *to));
|
||
}
|
||
|
||
/* Write the adjusted instructions into their displaced
|
||
location. */
|
||
append_insns (to, insn_length, buf);
|
||
}
|
||
|
||
|
||
#ifdef I386_REGNO_TO_SYMMETRY
|
||
#error "The Sequent Symmetry is no longer supported."
|
||
#endif
|
||
|
||
/* According to the System V ABI, the registers %ebp, %ebx, %edi, %esi
|
||
and %esp "belong" to the calling function. Therefore these
|
||
registers should be saved if they're going to be modified. */
|
||
|
||
/* The maximum number of saved registers. This should include all
|
||
registers mentioned above, and %eip. */
|
||
#define I386_NUM_SAVED_REGS I386_NUM_GREGS
|
||
|
||
struct i386_frame_cache
|
||
{
|
||
/* Base address. */
|
||
CORE_ADDR base;
|
||
int base_p;
|
||
LONGEST sp_offset;
|
||
CORE_ADDR pc;
|
||
|
||
/* Saved registers. */
|
||
CORE_ADDR saved_regs[I386_NUM_SAVED_REGS];
|
||
CORE_ADDR saved_sp;
|
||
int saved_sp_reg;
|
||
int pc_in_eax;
|
||
|
||
/* Stack space reserved for local variables. */
|
||
long locals;
|
||
};
|
||
|
||
/* Allocate and initialize a frame cache. */
|
||
|
||
static struct i386_frame_cache *
|
||
i386_alloc_frame_cache (void)
|
||
{
|
||
struct i386_frame_cache *cache;
|
||
int i;
|
||
|
||
cache = FRAME_OBSTACK_ZALLOC (struct i386_frame_cache);
|
||
|
||
/* Base address. */
|
||
cache->base_p = 0;
|
||
cache->base = 0;
|
||
cache->sp_offset = -4;
|
||
cache->pc = 0;
|
||
|
||
/* Saved registers. We initialize these to -1 since zero is a valid
|
||
offset (that's where %ebp is supposed to be stored). */
|
||
for (i = 0; i < I386_NUM_SAVED_REGS; i++)
|
||
cache->saved_regs[i] = -1;
|
||
cache->saved_sp = 0;
|
||
cache->saved_sp_reg = -1;
|
||
cache->pc_in_eax = 0;
|
||
|
||
/* Frameless until proven otherwise. */
|
||
cache->locals = -1;
|
||
|
||
return cache;
|
||
}
|
||
|
||
/* If the instruction at PC is a jump, return the address of its
|
||
target. Otherwise, return PC. */
|
||
|
||
static CORE_ADDR
|
||
i386_follow_jump (struct gdbarch *gdbarch, CORE_ADDR pc)
|
||
{
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
gdb_byte op;
|
||
long delta = 0;
|
||
int data16 = 0;
|
||
|
||
if (target_read_code (pc, &op, 1))
|
||
return pc;
|
||
|
||
if (op == 0x66)
|
||
{
|
||
data16 = 1;
|
||
|
||
op = read_code_unsigned_integer (pc + 1, 1, byte_order);
|
||
}
|
||
|
||
switch (op)
|
||
{
|
||
case 0xe9:
|
||
/* Relative jump: if data16 == 0, disp32, else disp16. */
|
||
if (data16)
|
||
{
|
||
delta = read_memory_integer (pc + 2, 2, byte_order);
|
||
|
||
/* Include the size of the jmp instruction (including the
|
||
0x66 prefix). */
|
||
delta += 4;
|
||
}
|
||
else
|
||
{
|
||
delta = read_memory_integer (pc + 1, 4, byte_order);
|
||
|
||
/* Include the size of the jmp instruction. */
|
||
delta += 5;
|
||
}
|
||
break;
|
||
case 0xeb:
|
||
/* Relative jump, disp8 (ignore data16). */
|
||
delta = read_memory_integer (pc + data16 + 1, 1, byte_order);
|
||
|
||
delta += data16 + 2;
|
||
break;
|
||
}
|
||
|
||
return pc + delta;
|
||
}
|
||
|
||
/* Check whether PC points at a prologue for a function returning a
|
||
structure or union. If so, it updates CACHE and returns the
|
||
address of the first instruction after the code sequence that
|
||
removes the "hidden" argument from the stack or CURRENT_PC,
|
||
whichever is smaller. Otherwise, return PC. */
|
||
|
||
static CORE_ADDR
|
||
i386_analyze_struct_return (CORE_ADDR pc, CORE_ADDR current_pc,
|
||
struct i386_frame_cache *cache)
|
||
{
|
||
/* Functions that return a structure or union start with:
|
||
|
||
popl %eax 0x58
|
||
xchgl %eax, (%esp) 0x87 0x04 0x24
|
||
or xchgl %eax, 0(%esp) 0x87 0x44 0x24 0x00
|
||
|
||
(the System V compiler puts out the second `xchg' instruction,
|
||
and the assembler doesn't try to optimize it, so the 'sib' form
|
||
gets generated). This sequence is used to get the address of the
|
||
return buffer for a function that returns a structure. */
|
||
static gdb_byte proto1[3] = { 0x87, 0x04, 0x24 };
|
||
static gdb_byte proto2[4] = { 0x87, 0x44, 0x24, 0x00 };
|
||
gdb_byte buf[4];
|
||
gdb_byte op;
|
||
|
||
if (current_pc <= pc)
|
||
return pc;
|
||
|
||
if (target_read_code (pc, &op, 1))
|
||
return pc;
|
||
|
||
if (op != 0x58) /* popl %eax */
|
||
return pc;
|
||
|
||
if (target_read_code (pc + 1, buf, 4))
|
||
return pc;
|
||
|
||
if (memcmp (buf, proto1, 3) != 0 && memcmp (buf, proto2, 4) != 0)
|
||
return pc;
|
||
|
||
if (current_pc == pc)
|
||
{
|
||
cache->sp_offset += 4;
|
||
return current_pc;
|
||
}
|
||
|
||
if (current_pc == pc + 1)
|
||
{
|
||
cache->pc_in_eax = 1;
|
||
return current_pc;
|
||
}
|
||
|
||
if (buf[1] == proto1[1])
|
||
return pc + 4;
|
||
else
|
||
return pc + 5;
|
||
}
|
||
|
||
static CORE_ADDR
|
||
i386_skip_probe (CORE_ADDR pc)
|
||
{
|
||
/* A function may start with
|
||
|
||
pushl constant
|
||
call _probe
|
||
addl $4, %esp
|
||
|
||
followed by
|
||
|
||
pushl %ebp
|
||
|
||
etc. */
|
||
gdb_byte buf[8];
|
||
gdb_byte op;
|
||
|
||
if (target_read_code (pc, &op, 1))
|
||
return pc;
|
||
|
||
if (op == 0x68 || op == 0x6a)
|
||
{
|
||
int delta;
|
||
|
||
/* Skip past the `pushl' instruction; it has either a one-byte or a
|
||
four-byte operand, depending on the opcode. */
|
||
if (op == 0x68)
|
||
delta = 5;
|
||
else
|
||
delta = 2;
|
||
|
||
/* Read the following 8 bytes, which should be `call _probe' (6
|
||
bytes) followed by `addl $4,%esp' (2 bytes). */
|
||
read_memory (pc + delta, buf, sizeof (buf));
|
||
if (buf[0] == 0xe8 && buf[6] == 0xc4 && buf[7] == 0x4)
|
||
pc += delta + sizeof (buf);
|
||
}
|
||
|
||
return pc;
|
||
}
|
||
|
||
/* GCC 4.1 and later, can put code in the prologue to realign the
|
||
stack pointer. Check whether PC points to such code, and update
|
||
CACHE accordingly. Return the first instruction after the code
|
||
sequence or CURRENT_PC, whichever is smaller. If we don't
|
||
recognize the code, return PC. */
|
||
|
||
static CORE_ADDR
|
||
i386_analyze_stack_align (CORE_ADDR pc, CORE_ADDR current_pc,
|
||
struct i386_frame_cache *cache)
|
||
{
|
||
/* There are 2 code sequences to re-align stack before the frame
|
||
gets set up:
|
||
|
||
1. Use a caller-saved saved register:
|
||
|
||
leal 4(%esp), %reg
|
||
andl $-XXX, %esp
|
||
pushl -4(%reg)
|
||
|
||
2. Use a callee-saved saved register:
|
||
|
||
pushl %reg
|
||
leal 8(%esp), %reg
|
||
andl $-XXX, %esp
|
||
pushl -4(%reg)
|
||
|
||
"andl $-XXX, %esp" can be either 3 bytes or 6 bytes:
|
||
|
||
0x83 0xe4 0xf0 andl $-16, %esp
|
||
0x81 0xe4 0x00 0xff 0xff 0xff andl $-256, %esp
|
||
*/
|
||
|
||
gdb_byte buf[14];
|
||
int reg;
|
||
int offset, offset_and;
|
||
static int regnums[8] = {
|
||
I386_EAX_REGNUM, /* %eax */
|
||
I386_ECX_REGNUM, /* %ecx */
|
||
I386_EDX_REGNUM, /* %edx */
|
||
I386_EBX_REGNUM, /* %ebx */
|
||
I386_ESP_REGNUM, /* %esp */
|
||
I386_EBP_REGNUM, /* %ebp */
|
||
I386_ESI_REGNUM, /* %esi */
|
||
I386_EDI_REGNUM /* %edi */
|
||
};
|
||
|
||
if (target_read_code (pc, buf, sizeof buf))
|
||
return pc;
|
||
|
||
/* Check caller-saved saved register. The first instruction has
|
||
to be "leal 4(%esp), %reg". */
|
||
if (buf[0] == 0x8d && buf[2] == 0x24 && buf[3] == 0x4)
|
||
{
|
||
/* MOD must be binary 10 and R/M must be binary 100. */
|
||
if ((buf[1] & 0xc7) != 0x44)
|
||
return pc;
|
||
|
||
/* REG has register number. */
|
||
reg = (buf[1] >> 3) & 7;
|
||
offset = 4;
|
||
}
|
||
else
|
||
{
|
||
/* Check callee-saved saved register. The first instruction
|
||
has to be "pushl %reg". */
|
||
if ((buf[0] & 0xf8) != 0x50)
|
||
return pc;
|
||
|
||
/* Get register. */
|
||
reg = buf[0] & 0x7;
|
||
|
||
/* The next instruction has to be "leal 8(%esp), %reg". */
|
||
if (buf[1] != 0x8d || buf[3] != 0x24 || buf[4] != 0x8)
|
||
return pc;
|
||
|
||
/* MOD must be binary 10 and R/M must be binary 100. */
|
||
if ((buf[2] & 0xc7) != 0x44)
|
||
return pc;
|
||
|
||
/* REG has register number. Registers in pushl and leal have to
|
||
be the same. */
|
||
if (reg != ((buf[2] >> 3) & 7))
|
||
return pc;
|
||
|
||
offset = 5;
|
||
}
|
||
|
||
/* Rigister can't be %esp nor %ebp. */
|
||
if (reg == 4 || reg == 5)
|
||
return pc;
|
||
|
||
/* The next instruction has to be "andl $-XXX, %esp". */
|
||
if (buf[offset + 1] != 0xe4
|
||
|| (buf[offset] != 0x81 && buf[offset] != 0x83))
|
||
return pc;
|
||
|
||
offset_and = offset;
|
||
offset += buf[offset] == 0x81 ? 6 : 3;
|
||
|
||
/* The next instruction has to be "pushl -4(%reg)". 8bit -4 is
|
||
0xfc. REG must be binary 110 and MOD must be binary 01. */
|
||
if (buf[offset] != 0xff
|
||
|| buf[offset + 2] != 0xfc
|
||
|| (buf[offset + 1] & 0xf8) != 0x70)
|
||
return pc;
|
||
|
||
/* R/M has register. Registers in leal and pushl have to be the
|
||
same. */
|
||
if (reg != (buf[offset + 1] & 7))
|
||
return pc;
|
||
|
||
if (current_pc > pc + offset_and)
|
||
cache->saved_sp_reg = regnums[reg];
|
||
|
||
return min (pc + offset + 3, current_pc);
|
||
}
|
||
|
||
/* Maximum instruction length we need to handle. */
|
||
#define I386_MAX_MATCHED_INSN_LEN 6
|
||
|
||
/* Instruction description. */
|
||
struct i386_insn
|
||
{
|
||
size_t len;
|
||
gdb_byte insn[I386_MAX_MATCHED_INSN_LEN];
|
||
gdb_byte mask[I386_MAX_MATCHED_INSN_LEN];
|
||
};
|
||
|
||
/* Return whether instruction at PC matches PATTERN. */
|
||
|
||
static int
|
||
i386_match_pattern (CORE_ADDR pc, struct i386_insn pattern)
|
||
{
|
||
gdb_byte op;
|
||
|
||
if (target_read_code (pc, &op, 1))
|
||
return 0;
|
||
|
||
if ((op & pattern.mask[0]) == pattern.insn[0])
|
||
{
|
||
gdb_byte buf[I386_MAX_MATCHED_INSN_LEN - 1];
|
||
int insn_matched = 1;
|
||
size_t i;
|
||
|
||
gdb_assert (pattern.len > 1);
|
||
gdb_assert (pattern.len <= I386_MAX_MATCHED_INSN_LEN);
|
||
|
||
if (target_read_code (pc + 1, buf, pattern.len - 1))
|
||
return 0;
|
||
|
||
for (i = 1; i < pattern.len; i++)
|
||
{
|
||
if ((buf[i - 1] & pattern.mask[i]) != pattern.insn[i])
|
||
insn_matched = 0;
|
||
}
|
||
return insn_matched;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Search for the instruction at PC in the list INSN_PATTERNS. Return
|
||
the first instruction description that matches. Otherwise, return
|
||
NULL. */
|
||
|
||
static struct i386_insn *
|
||
i386_match_insn (CORE_ADDR pc, struct i386_insn *insn_patterns)
|
||
{
|
||
struct i386_insn *pattern;
|
||
|
||
for (pattern = insn_patterns; pattern->len > 0; pattern++)
|
||
{
|
||
if (i386_match_pattern (pc, *pattern))
|
||
return pattern;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Return whether PC points inside a sequence of instructions that
|
||
matches INSN_PATTERNS. */
|
||
|
||
static int
|
||
i386_match_insn_block (CORE_ADDR pc, struct i386_insn *insn_patterns)
|
||
{
|
||
CORE_ADDR current_pc;
|
||
int ix, i;
|
||
struct i386_insn *insn;
|
||
|
||
insn = i386_match_insn (pc, insn_patterns);
|
||
if (insn == NULL)
|
||
return 0;
|
||
|
||
current_pc = pc;
|
||
ix = insn - insn_patterns;
|
||
for (i = ix - 1; i >= 0; i--)
|
||
{
|
||
current_pc -= insn_patterns[i].len;
|
||
|
||
if (!i386_match_pattern (current_pc, insn_patterns[i]))
|
||
return 0;
|
||
}
|
||
|
||
current_pc = pc + insn->len;
|
||
for (insn = insn_patterns + ix + 1; insn->len > 0; insn++)
|
||
{
|
||
if (!i386_match_pattern (current_pc, *insn))
|
||
return 0;
|
||
|
||
current_pc += insn->len;
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* Some special instructions that might be migrated by GCC into the
|
||
part of the prologue that sets up the new stack frame. Because the
|
||
stack frame hasn't been setup yet, no registers have been saved
|
||
yet, and only the scratch registers %eax, %ecx and %edx can be
|
||
touched. */
|
||
|
||
struct i386_insn i386_frame_setup_skip_insns[] =
|
||
{
|
||
/* Check for `movb imm8, r' and `movl imm32, r'.
|
||
|
||
??? Should we handle 16-bit operand-sizes here? */
|
||
|
||
/* `movb imm8, %al' and `movb imm8, %ah' */
|
||
/* `movb imm8, %cl' and `movb imm8, %ch' */
|
||
{ 2, { 0xb0, 0x00 }, { 0xfa, 0x00 } },
|
||
/* `movb imm8, %dl' and `movb imm8, %dh' */
|
||
{ 2, { 0xb2, 0x00 }, { 0xfb, 0x00 } },
|
||
/* `movl imm32, %eax' and `movl imm32, %ecx' */
|
||
{ 5, { 0xb8 }, { 0xfe } },
|
||
/* `movl imm32, %edx' */
|
||
{ 5, { 0xba }, { 0xff } },
|
||
|
||
/* Check for `mov imm32, r32'. Note that there is an alternative
|
||
encoding for `mov m32, %eax'.
|
||
|
||
??? Should we handle SIB adressing here?
|
||
??? Should we handle 16-bit operand-sizes here? */
|
||
|
||
/* `movl m32, %eax' */
|
||
{ 5, { 0xa1 }, { 0xff } },
|
||
/* `movl m32, %eax' and `mov; m32, %ecx' */
|
||
{ 6, { 0x89, 0x05 }, {0xff, 0xf7 } },
|
||
/* `movl m32, %edx' */
|
||
{ 6, { 0x89, 0x15 }, {0xff, 0xff } },
|
||
|
||
/* Check for `xorl r32, r32' and the equivalent `subl r32, r32'.
|
||
Because of the symmetry, there are actually two ways to encode
|
||
these instructions; opcode bytes 0x29 and 0x2b for `subl' and
|
||
opcode bytes 0x31 and 0x33 for `xorl'. */
|
||
|
||
/* `subl %eax, %eax' */
|
||
{ 2, { 0x29, 0xc0 }, { 0xfd, 0xff } },
|
||
/* `subl %ecx, %ecx' */
|
||
{ 2, { 0x29, 0xc9 }, { 0xfd, 0xff } },
|
||
/* `subl %edx, %edx' */
|
||
{ 2, { 0x29, 0xd2 }, { 0xfd, 0xff } },
|
||
/* `xorl %eax, %eax' */
|
||
{ 2, { 0x31, 0xc0 }, { 0xfd, 0xff } },
|
||
/* `xorl %ecx, %ecx' */
|
||
{ 2, { 0x31, 0xc9 }, { 0xfd, 0xff } },
|
||
/* `xorl %edx, %edx' */
|
||
{ 2, { 0x31, 0xd2 }, { 0xfd, 0xff } },
|
||
{ 0 }
|
||
};
|
||
|
||
|
||
/* Check whether PC points to a no-op instruction. */
|
||
static CORE_ADDR
|
||
i386_skip_noop (CORE_ADDR pc)
|
||
{
|
||
gdb_byte op;
|
||
int check = 1;
|
||
|
||
if (target_read_code (pc, &op, 1))
|
||
return pc;
|
||
|
||
while (check)
|
||
{
|
||
check = 0;
|
||
/* Ignore `nop' instruction. */
|
||
if (op == 0x90)
|
||
{
|
||
pc += 1;
|
||
if (target_read_code (pc, &op, 1))
|
||
return pc;
|
||
check = 1;
|
||
}
|
||
/* Ignore no-op instruction `mov %edi, %edi'.
|
||
Microsoft system dlls often start with
|
||
a `mov %edi,%edi' instruction.
|
||
The 5 bytes before the function start are
|
||
filled with `nop' instructions.
|
||
This pattern can be used for hot-patching:
|
||
The `mov %edi, %edi' instruction can be replaced by a
|
||
near jump to the location of the 5 `nop' instructions
|
||
which can be replaced by a 32-bit jump to anywhere
|
||
in the 32-bit address space. */
|
||
|
||
else if (op == 0x8b)
|
||
{
|
||
if (target_read_code (pc + 1, &op, 1))
|
||
return pc;
|
||
|
||
if (op == 0xff)
|
||
{
|
||
pc += 2;
|
||
if (target_read_code (pc, &op, 1))
|
||
return pc;
|
||
|
||
check = 1;
|
||
}
|
||
}
|
||
}
|
||
return pc;
|
||
}
|
||
|
||
/* Check whether PC points at a code that sets up a new stack frame.
|
||
If so, it updates CACHE and returns the address of the first
|
||
instruction after the sequence that sets up the frame or LIMIT,
|
||
whichever is smaller. If we don't recognize the code, return PC. */
|
||
|
||
static CORE_ADDR
|
||
i386_analyze_frame_setup (struct gdbarch *gdbarch,
|
||
CORE_ADDR pc, CORE_ADDR limit,
|
||
struct i386_frame_cache *cache)
|
||
{
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
struct i386_insn *insn;
|
||
gdb_byte op;
|
||
int skip = 0;
|
||
|
||
if (limit <= pc)
|
||
return limit;
|
||
|
||
if (target_read_code (pc, &op, 1))
|
||
return pc;
|
||
|
||
if (op == 0x55) /* pushl %ebp */
|
||
{
|
||
/* Take into account that we've executed the `pushl %ebp' that
|
||
starts this instruction sequence. */
|
||
cache->saved_regs[I386_EBP_REGNUM] = 0;
|
||
cache->sp_offset += 4;
|
||
pc++;
|
||
|
||
/* If that's all, return now. */
|
||
if (limit <= pc)
|
||
return limit;
|
||
|
||
/* Check for some special instructions that might be migrated by
|
||
GCC into the prologue and skip them. At this point in the
|
||
prologue, code should only touch the scratch registers %eax,
|
||
%ecx and %edx, so while the number of posibilities is sheer,
|
||
it is limited.
|
||
|
||
Make sure we only skip these instructions if we later see the
|
||
`movl %esp, %ebp' that actually sets up the frame. */
|
||
while (pc + skip < limit)
|
||
{
|
||
insn = i386_match_insn (pc + skip, i386_frame_setup_skip_insns);
|
||
if (insn == NULL)
|
||
break;
|
||
|
||
skip += insn->len;
|
||
}
|
||
|
||
/* If that's all, return now. */
|
||
if (limit <= pc + skip)
|
||
return limit;
|
||
|
||
if (target_read_code (pc + skip, &op, 1))
|
||
return pc + skip;
|
||
|
||
/* The i386 prologue looks like
|
||
|
||
push %ebp
|
||
mov %esp,%ebp
|
||
sub $0x10,%esp
|
||
|
||
and a different prologue can be generated for atom.
|
||
|
||
push %ebp
|
||
lea (%esp),%ebp
|
||
lea -0x10(%esp),%esp
|
||
|
||
We handle both of them here. */
|
||
|
||
switch (op)
|
||
{
|
||
/* Check for `movl %esp, %ebp' -- can be written in two ways. */
|
||
case 0x8b:
|
||
if (read_code_unsigned_integer (pc + skip + 1, 1, byte_order)
|
||
!= 0xec)
|
||
return pc;
|
||
pc += (skip + 2);
|
||
break;
|
||
case 0x89:
|
||
if (read_code_unsigned_integer (pc + skip + 1, 1, byte_order)
|
||
!= 0xe5)
|
||
return pc;
|
||
pc += (skip + 2);
|
||
break;
|
||
case 0x8d: /* Check for 'lea (%ebp), %ebp'. */
|
||
if (read_code_unsigned_integer (pc + skip + 1, 2, byte_order)
|
||
!= 0x242c)
|
||
return pc;
|
||
pc += (skip + 3);
|
||
break;
|
||
default:
|
||
return pc;
|
||
}
|
||
|
||
/* OK, we actually have a frame. We just don't know how large
|
||
it is yet. Set its size to zero. We'll adjust it if
|
||
necessary. We also now commit to skipping the special
|
||
instructions mentioned before. */
|
||
cache->locals = 0;
|
||
|
||
/* If that's all, return now. */
|
||
if (limit <= pc)
|
||
return limit;
|
||
|
||
/* Check for stack adjustment
|
||
|
||
subl $XXX, %esp
|
||
or
|
||
lea -XXX(%esp),%esp
|
||
|
||
NOTE: You can't subtract a 16-bit immediate from a 32-bit
|
||
reg, so we don't have to worry about a data16 prefix. */
|
||
if (target_read_code (pc, &op, 1))
|
||
return pc;
|
||
if (op == 0x83)
|
||
{
|
||
/* `subl' with 8-bit immediate. */
|
||
if (read_code_unsigned_integer (pc + 1, 1, byte_order) != 0xec)
|
||
/* Some instruction starting with 0x83 other than `subl'. */
|
||
return pc;
|
||
|
||
/* `subl' with signed 8-bit immediate (though it wouldn't
|
||
make sense to be negative). */
|
||
cache->locals = read_code_integer (pc + 2, 1, byte_order);
|
||
return pc + 3;
|
||
}
|
||
else if (op == 0x81)
|
||
{
|
||
/* Maybe it is `subl' with a 32-bit immediate. */
|
||
if (read_code_unsigned_integer (pc + 1, 1, byte_order) != 0xec)
|
||
/* Some instruction starting with 0x81 other than `subl'. */
|
||
return pc;
|
||
|
||
/* It is `subl' with a 32-bit immediate. */
|
||
cache->locals = read_code_integer (pc + 2, 4, byte_order);
|
||
return pc + 6;
|
||
}
|
||
else if (op == 0x8d)
|
||
{
|
||
/* The ModR/M byte is 0x64. */
|
||
if (read_code_unsigned_integer (pc + 1, 1, byte_order) != 0x64)
|
||
return pc;
|
||
/* 'lea' with 8-bit displacement. */
|
||
cache->locals = -1 * read_code_integer (pc + 3, 1, byte_order);
|
||
return pc + 4;
|
||
}
|
||
else
|
||
{
|
||
/* Some instruction other than `subl' nor 'lea'. */
|
||
return pc;
|
||
}
|
||
}
|
||
else if (op == 0xc8) /* enter */
|
||
{
|
||
cache->locals = read_code_unsigned_integer (pc + 1, 2, byte_order);
|
||
return pc + 4;
|
||
}
|
||
|
||
return pc;
|
||
}
|
||
|
||
/* Check whether PC points at code that saves registers on the stack.
|
||
If so, it updates CACHE and returns the address of the first
|
||
instruction after the register saves or CURRENT_PC, whichever is
|
||
smaller. Otherwise, return PC. */
|
||
|
||
static CORE_ADDR
|
||
i386_analyze_register_saves (CORE_ADDR pc, CORE_ADDR current_pc,
|
||
struct i386_frame_cache *cache)
|
||
{
|
||
CORE_ADDR offset = 0;
|
||
gdb_byte op;
|
||
int i;
|
||
|
||
if (cache->locals > 0)
|
||
offset -= cache->locals;
|
||
for (i = 0; i < 8 && pc < current_pc; i++)
|
||
{
|
||
if (target_read_code (pc, &op, 1))
|
||
return pc;
|
||
if (op < 0x50 || op > 0x57)
|
||
break;
|
||
|
||
offset -= 4;
|
||
cache->saved_regs[op - 0x50] = offset;
|
||
cache->sp_offset += 4;
|
||
pc++;
|
||
}
|
||
|
||
return pc;
|
||
}
|
||
|
||
/* Do a full analysis of the prologue at PC and update CACHE
|
||
accordingly. Bail out early if CURRENT_PC is reached. Return the
|
||
address where the analysis stopped.
|
||
|
||
We handle these cases:
|
||
|
||
The startup sequence can be at the start of the function, or the
|
||
function can start with a branch to startup code at the end.
|
||
|
||
%ebp can be set up with either the 'enter' instruction, or "pushl
|
||
%ebp, movl %esp, %ebp" (`enter' is too slow to be useful, but was
|
||
once used in the System V compiler).
|
||
|
||
Local space is allocated just below the saved %ebp by either the
|
||
'enter' instruction, or by "subl $<size>, %esp". 'enter' has a
|
||
16-bit unsigned argument for space to allocate, and the 'addl'
|
||
instruction could have either a signed byte, or 32-bit immediate.
|
||
|
||
Next, the registers used by this function are pushed. With the
|
||
System V compiler they will always be in the order: %edi, %esi,
|
||
%ebx (and sometimes a harmless bug causes it to also save but not
|
||
restore %eax); however, the code below is willing to see the pushes
|
||
in any order, and will handle up to 8 of them.
|
||
|
||
If the setup sequence is at the end of the function, then the next
|
||
instruction will be a branch back to the start. */
|
||
|
||
static CORE_ADDR
|
||
i386_analyze_prologue (struct gdbarch *gdbarch,
|
||
CORE_ADDR pc, CORE_ADDR current_pc,
|
||
struct i386_frame_cache *cache)
|
||
{
|
||
pc = i386_skip_noop (pc);
|
||
pc = i386_follow_jump (gdbarch, pc);
|
||
pc = i386_analyze_struct_return (pc, current_pc, cache);
|
||
pc = i386_skip_probe (pc);
|
||
pc = i386_analyze_stack_align (pc, current_pc, cache);
|
||
pc = i386_analyze_frame_setup (gdbarch, pc, current_pc, cache);
|
||
return i386_analyze_register_saves (pc, current_pc, cache);
|
||
}
|
||
|
||
/* Return PC of first real instruction. */
|
||
|
||
static CORE_ADDR
|
||
i386_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc)
|
||
{
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
|
||
static gdb_byte pic_pat[6] =
|
||
{
|
||
0xe8, 0, 0, 0, 0, /* call 0x0 */
|
||
0x5b, /* popl %ebx */
|
||
};
|
||
struct i386_frame_cache cache;
|
||
CORE_ADDR pc;
|
||
gdb_byte op;
|
||
int i;
|
||
CORE_ADDR func_addr;
|
||
|
||
if (find_pc_partial_function (start_pc, NULL, &func_addr, NULL))
|
||
{
|
||
CORE_ADDR post_prologue_pc
|
||
= skip_prologue_using_sal (gdbarch, func_addr);
|
||
struct symtab *s = find_pc_symtab (func_addr);
|
||
|
||
/* Clang always emits a line note before the prologue and another
|
||
one after. We trust clang to emit usable line notes. */
|
||
if (post_prologue_pc
|
||
&& (s != NULL
|
||
&& s->producer != NULL
|
||
&& strncmp (s->producer, "clang ", sizeof ("clang ") - 1) == 0))
|
||
return max (start_pc, post_prologue_pc);
|
||
}
|
||
|
||
cache.locals = -1;
|
||
pc = i386_analyze_prologue (gdbarch, start_pc, 0xffffffff, &cache);
|
||
if (cache.locals < 0)
|
||
return start_pc;
|
||
|
||
/* Found valid frame setup. */
|
||
|
||
/* The native cc on SVR4 in -K PIC mode inserts the following code
|
||
to get the address of the global offset table (GOT) into register
|
||
%ebx:
|
||
|
||
call 0x0
|
||
popl %ebx
|
||
movl %ebx,x(%ebp) (optional)
|
||
addl y,%ebx
|
||
|
||
This code is with the rest of the prologue (at the end of the
|
||
function), so we have to skip it to get to the first real
|
||
instruction at the start of the function. */
|
||
|
||
for (i = 0; i < 6; i++)
|
||
{
|
||
if (target_read_code (pc + i, &op, 1))
|
||
return pc;
|
||
|
||
if (pic_pat[i] != op)
|
||
break;
|
||
}
|
||
if (i == 6)
|
||
{
|
||
int delta = 6;
|
||
|
||
if (target_read_code (pc + delta, &op, 1))
|
||
return pc;
|
||
|
||
if (op == 0x89) /* movl %ebx, x(%ebp) */
|
||
{
|
||
op = read_code_unsigned_integer (pc + delta + 1, 1, byte_order);
|
||
|
||
if (op == 0x5d) /* One byte offset from %ebp. */
|
||
delta += 3;
|
||
else if (op == 0x9d) /* Four byte offset from %ebp. */
|
||
delta += 6;
|
||
else /* Unexpected instruction. */
|
||
delta = 0;
|
||
|
||
if (target_read_code (pc + delta, &op, 1))
|
||
return pc;
|
||
}
|
||
|
||
/* addl y,%ebx */
|
||
if (delta > 0 && op == 0x81
|
||
&& read_code_unsigned_integer (pc + delta + 1, 1, byte_order)
|
||
== 0xc3)
|
||
{
|
||
pc += delta + 6;
|
||
}
|
||
}
|
||
|
||
/* If the function starts with a branch (to startup code at the end)
|
||
the last instruction should bring us back to the first
|
||
instruction of the real code. */
|
||
if (i386_follow_jump (gdbarch, start_pc) != start_pc)
|
||
pc = i386_follow_jump (gdbarch, pc);
|
||
|
||
return pc;
|
||
}
|
||
|
||
/* Check that the code pointed to by PC corresponds to a call to
|
||
__main, skip it if so. Return PC otherwise. */
|
||
|
||
CORE_ADDR
|
||
i386_skip_main_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
|
||
{
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
gdb_byte op;
|
||
|
||
if (target_read_code (pc, &op, 1))
|
||
return pc;
|
||
if (op == 0xe8)
|
||
{
|
||
gdb_byte buf[4];
|
||
|
||
if (target_read_code (pc + 1, buf, sizeof buf) == 0)
|
||
{
|
||
/* Make sure address is computed correctly as a 32bit
|
||
integer even if CORE_ADDR is 64 bit wide. */
|
||
struct bound_minimal_symbol s;
|
||
CORE_ADDR call_dest;
|
||
|
||
call_dest = pc + 5 + extract_signed_integer (buf, 4, byte_order);
|
||
call_dest = call_dest & 0xffffffffU;
|
||
s = lookup_minimal_symbol_by_pc (call_dest);
|
||
if (s.minsym != NULL
|
||
&& SYMBOL_LINKAGE_NAME (s.minsym) != NULL
|
||
&& strcmp (SYMBOL_LINKAGE_NAME (s.minsym), "__main") == 0)
|
||
pc += 5;
|
||
}
|
||
}
|
||
|
||
return pc;
|
||
}
|
||
|
||
/* This function is 64-bit safe. */
|
||
|
||
static CORE_ADDR
|
||
i386_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
||
{
|
||
gdb_byte buf[8];
|
||
|
||
frame_unwind_register (next_frame, gdbarch_pc_regnum (gdbarch), buf);
|
||
return extract_typed_address (buf, builtin_type (gdbarch)->builtin_func_ptr);
|
||
}
|
||
|
||
|
||
/* Normal frames. */
|
||
|
||
static void
|
||
i386_frame_cache_1 (struct frame_info *this_frame,
|
||
struct i386_frame_cache *cache)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
gdb_byte buf[4];
|
||
int i;
|
||
|
||
cache->pc = get_frame_func (this_frame);
|
||
|
||
/* In principle, for normal frames, %ebp holds the frame pointer,
|
||
which holds the base address for the current stack frame.
|
||
However, for functions that don't need it, the frame pointer is
|
||
optional. For these "frameless" functions the frame pointer is
|
||
actually the frame pointer of the calling frame. Signal
|
||
trampolines are just a special case of a "frameless" function.
|
||
They (usually) share their frame pointer with the frame that was
|
||
in progress when the signal occurred. */
|
||
|
||
get_frame_register (this_frame, I386_EBP_REGNUM, buf);
|
||
cache->base = extract_unsigned_integer (buf, 4, byte_order);
|
||
if (cache->base == 0)
|
||
{
|
||
cache->base_p = 1;
|
||
return;
|
||
}
|
||
|
||
/* For normal frames, %eip is stored at 4(%ebp). */
|
||
cache->saved_regs[I386_EIP_REGNUM] = 4;
|
||
|
||
if (cache->pc != 0)
|
||
i386_analyze_prologue (gdbarch, cache->pc, get_frame_pc (this_frame),
|
||
cache);
|
||
|
||
if (cache->locals < 0)
|
||
{
|
||
/* We didn't find a valid frame, which means that CACHE->base
|
||
currently holds the frame pointer for our calling frame. If
|
||
we're at the start of a function, or somewhere half-way its
|
||
prologue, the function's frame probably hasn't been fully
|
||
setup yet. Try to reconstruct the base address for the stack
|
||
frame by looking at the stack pointer. For truly "frameless"
|
||
functions this might work too. */
|
||
|
||
if (cache->saved_sp_reg != -1)
|
||
{
|
||
/* Saved stack pointer has been saved. */
|
||
get_frame_register (this_frame, cache->saved_sp_reg, buf);
|
||
cache->saved_sp = extract_unsigned_integer (buf, 4, byte_order);
|
||
|
||
/* We're halfway aligning the stack. */
|
||
cache->base = ((cache->saved_sp - 4) & 0xfffffff0) - 4;
|
||
cache->saved_regs[I386_EIP_REGNUM] = cache->saved_sp - 4;
|
||
|
||
/* This will be added back below. */
|
||
cache->saved_regs[I386_EIP_REGNUM] -= cache->base;
|
||
}
|
||
else if (cache->pc != 0
|
||
|| target_read_code (get_frame_pc (this_frame), buf, 1))
|
||
{
|
||
/* We're in a known function, but did not find a frame
|
||
setup. Assume that the function does not use %ebp.
|
||
Alternatively, we may have jumped to an invalid
|
||
address; in that case there is definitely no new
|
||
frame in %ebp. */
|
||
get_frame_register (this_frame, I386_ESP_REGNUM, buf);
|
||
cache->base = extract_unsigned_integer (buf, 4, byte_order)
|
||
+ cache->sp_offset;
|
||
}
|
||
else
|
||
/* We're in an unknown function. We could not find the start
|
||
of the function to analyze the prologue; our best option is
|
||
to assume a typical frame layout with the caller's %ebp
|
||
saved. */
|
||
cache->saved_regs[I386_EBP_REGNUM] = 0;
|
||
}
|
||
|
||
if (cache->saved_sp_reg != -1)
|
||
{
|
||
/* Saved stack pointer has been saved (but the SAVED_SP_REG
|
||
register may be unavailable). */
|
||
if (cache->saved_sp == 0
|
||
&& deprecated_frame_register_read (this_frame,
|
||
cache->saved_sp_reg, buf))
|
||
cache->saved_sp = extract_unsigned_integer (buf, 4, byte_order);
|
||
}
|
||
/* Now that we have the base address for the stack frame we can
|
||
calculate the value of %esp in the calling frame. */
|
||
else if (cache->saved_sp == 0)
|
||
cache->saved_sp = cache->base + 8;
|
||
|
||
/* Adjust all the saved registers such that they contain addresses
|
||
instead of offsets. */
|
||
for (i = 0; i < I386_NUM_SAVED_REGS; i++)
|
||
if (cache->saved_regs[i] != -1)
|
||
cache->saved_regs[i] += cache->base;
|
||
|
||
cache->base_p = 1;
|
||
}
|
||
|
||
static struct i386_frame_cache *
|
||
i386_frame_cache (struct frame_info *this_frame, void **this_cache)
|
||
{
|
||
volatile struct gdb_exception ex;
|
||
struct i386_frame_cache *cache;
|
||
|
||
if (*this_cache)
|
||
return *this_cache;
|
||
|
||
cache = i386_alloc_frame_cache ();
|
||
*this_cache = cache;
|
||
|
||
TRY_CATCH (ex, RETURN_MASK_ERROR)
|
||
{
|
||
i386_frame_cache_1 (this_frame, cache);
|
||
}
|
||
if (ex.reason < 0 && ex.error != NOT_AVAILABLE_ERROR)
|
||
throw_exception (ex);
|
||
|
||
return cache;
|
||
}
|
||
|
||
static void
|
||
i386_frame_this_id (struct frame_info *this_frame, void **this_cache,
|
||
struct frame_id *this_id)
|
||
{
|
||
struct i386_frame_cache *cache = i386_frame_cache (this_frame, this_cache);
|
||
|
||
if (!cache->base_p)
|
||
(*this_id) = frame_id_build_unavailable_stack (cache->pc);
|
||
else if (cache->base == 0)
|
||
{
|
||
/* This marks the outermost frame. */
|
||
}
|
||
else
|
||
{
|
||
/* See the end of i386_push_dummy_call. */
|
||
(*this_id) = frame_id_build (cache->base + 8, cache->pc);
|
||
}
|
||
}
|
||
|
||
static enum unwind_stop_reason
|
||
i386_frame_unwind_stop_reason (struct frame_info *this_frame,
|
||
void **this_cache)
|
||
{
|
||
struct i386_frame_cache *cache = i386_frame_cache (this_frame, this_cache);
|
||
|
||
if (!cache->base_p)
|
||
return UNWIND_UNAVAILABLE;
|
||
|
||
/* This marks the outermost frame. */
|
||
if (cache->base == 0)
|
||
return UNWIND_OUTERMOST;
|
||
|
||
return UNWIND_NO_REASON;
|
||
}
|
||
|
||
static struct value *
|
||
i386_frame_prev_register (struct frame_info *this_frame, void **this_cache,
|
||
int regnum)
|
||
{
|
||
struct i386_frame_cache *cache = i386_frame_cache (this_frame, this_cache);
|
||
|
||
gdb_assert (regnum >= 0);
|
||
|
||
/* The System V ABI says that:
|
||
|
||
"The flags register contains the system flags, such as the
|
||
direction flag and the carry flag. The direction flag must be
|
||
set to the forward (that is, zero) direction before entry and
|
||
upon exit from a function. Other user flags have no specified
|
||
role in the standard calling sequence and are not preserved."
|
||
|
||
To guarantee the "upon exit" part of that statement we fake a
|
||
saved flags register that has its direction flag cleared.
|
||
|
||
Note that GCC doesn't seem to rely on the fact that the direction
|
||
flag is cleared after a function return; it always explicitly
|
||
clears the flag before operations where it matters.
|
||
|
||
FIXME: kettenis/20030316: I'm not quite sure whether this is the
|
||
right thing to do. The way we fake the flags register here makes
|
||
it impossible to change it. */
|
||
|
||
if (regnum == I386_EFLAGS_REGNUM)
|
||
{
|
||
ULONGEST val;
|
||
|
||
val = get_frame_register_unsigned (this_frame, regnum);
|
||
val &= ~(1 << 10);
|
||
return frame_unwind_got_constant (this_frame, regnum, val);
|
||
}
|
||
|
||
if (regnum == I386_EIP_REGNUM && cache->pc_in_eax)
|
||
return frame_unwind_got_register (this_frame, regnum, I386_EAX_REGNUM);
|
||
|
||
if (regnum == I386_ESP_REGNUM
|
||
&& (cache->saved_sp != 0 || cache->saved_sp_reg != -1))
|
||
{
|
||
/* If the SP has been saved, but we don't know where, then this
|
||
means that SAVED_SP_REG register was found unavailable back
|
||
when we built the cache. */
|
||
if (cache->saved_sp == 0)
|
||
return frame_unwind_got_register (this_frame, regnum,
|
||
cache->saved_sp_reg);
|
||
else
|
||
return frame_unwind_got_constant (this_frame, regnum,
|
||
cache->saved_sp);
|
||
}
|
||
|
||
if (regnum < I386_NUM_SAVED_REGS && cache->saved_regs[regnum] != -1)
|
||
return frame_unwind_got_memory (this_frame, regnum,
|
||
cache->saved_regs[regnum]);
|
||
|
||
return frame_unwind_got_register (this_frame, regnum, regnum);
|
||
}
|
||
|
||
static const struct frame_unwind i386_frame_unwind =
|
||
{
|
||
NORMAL_FRAME,
|
||
i386_frame_unwind_stop_reason,
|
||
i386_frame_this_id,
|
||
i386_frame_prev_register,
|
||
NULL,
|
||
default_frame_sniffer
|
||
};
|
||
|
||
/* Normal frames, but in a function epilogue. */
|
||
|
||
/* The epilogue is defined here as the 'ret' instruction, which will
|
||
follow any instruction such as 'leave' or 'pop %ebp' that destroys
|
||
the function's stack frame. */
|
||
|
||
static int
|
||
i386_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
|
||
{
|
||
gdb_byte insn;
|
||
struct symtab *symtab;
|
||
|
||
symtab = find_pc_symtab (pc);
|
||
if (symtab && symtab->epilogue_unwind_valid)
|
||
return 0;
|
||
|
||
if (target_read_memory (pc, &insn, 1))
|
||
return 0; /* Can't read memory at pc. */
|
||
|
||
if (insn != 0xc3) /* 'ret' instruction. */
|
||
return 0;
|
||
|
||
return 1;
|
||
}
|
||
|
||
static int
|
||
i386_epilogue_frame_sniffer (const struct frame_unwind *self,
|
||
struct frame_info *this_frame,
|
||
void **this_prologue_cache)
|
||
{
|
||
if (frame_relative_level (this_frame) == 0)
|
||
return i386_in_function_epilogue_p (get_frame_arch (this_frame),
|
||
get_frame_pc (this_frame));
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
static struct i386_frame_cache *
|
||
i386_epilogue_frame_cache (struct frame_info *this_frame, void **this_cache)
|
||
{
|
||
volatile struct gdb_exception ex;
|
||
struct i386_frame_cache *cache;
|
||
CORE_ADDR sp;
|
||
|
||
if (*this_cache)
|
||
return *this_cache;
|
||
|
||
cache = i386_alloc_frame_cache ();
|
||
*this_cache = cache;
|
||
|
||
TRY_CATCH (ex, RETURN_MASK_ERROR)
|
||
{
|
||
cache->pc = get_frame_func (this_frame);
|
||
|
||
/* At this point the stack looks as if we just entered the
|
||
function, with the return address at the top of the
|
||
stack. */
|
||
sp = get_frame_register_unsigned (this_frame, I386_ESP_REGNUM);
|
||
cache->base = sp + cache->sp_offset;
|
||
cache->saved_sp = cache->base + 8;
|
||
cache->saved_regs[I386_EIP_REGNUM] = cache->base + 4;
|
||
|
||
cache->base_p = 1;
|
||
}
|
||
if (ex.reason < 0 && ex.error != NOT_AVAILABLE_ERROR)
|
||
throw_exception (ex);
|
||
|
||
return cache;
|
||
}
|
||
|
||
static enum unwind_stop_reason
|
||
i386_epilogue_frame_unwind_stop_reason (struct frame_info *this_frame,
|
||
void **this_cache)
|
||
{
|
||
struct i386_frame_cache *cache =
|
||
i386_epilogue_frame_cache (this_frame, this_cache);
|
||
|
||
if (!cache->base_p)
|
||
return UNWIND_UNAVAILABLE;
|
||
|
||
return UNWIND_NO_REASON;
|
||
}
|
||
|
||
static void
|
||
i386_epilogue_frame_this_id (struct frame_info *this_frame,
|
||
void **this_cache,
|
||
struct frame_id *this_id)
|
||
{
|
||
struct i386_frame_cache *cache =
|
||
i386_epilogue_frame_cache (this_frame, this_cache);
|
||
|
||
if (!cache->base_p)
|
||
(*this_id) = frame_id_build_unavailable_stack (cache->pc);
|
||
else
|
||
(*this_id) = frame_id_build (cache->base + 8, cache->pc);
|
||
}
|
||
|
||
static struct value *
|
||
i386_epilogue_frame_prev_register (struct frame_info *this_frame,
|
||
void **this_cache, int regnum)
|
||
{
|
||
/* Make sure we've initialized the cache. */
|
||
i386_epilogue_frame_cache (this_frame, this_cache);
|
||
|
||
return i386_frame_prev_register (this_frame, this_cache, regnum);
|
||
}
|
||
|
||
static const struct frame_unwind i386_epilogue_frame_unwind =
|
||
{
|
||
NORMAL_FRAME,
|
||
i386_epilogue_frame_unwind_stop_reason,
|
||
i386_epilogue_frame_this_id,
|
||
i386_epilogue_frame_prev_register,
|
||
NULL,
|
||
i386_epilogue_frame_sniffer
|
||
};
|
||
|
||
|
||
/* Stack-based trampolines. */
|
||
|
||
/* These trampolines are used on cross x86 targets, when taking the
|
||
address of a nested function. When executing these trampolines,
|
||
no stack frame is set up, so we are in a similar situation as in
|
||
epilogues and i386_epilogue_frame_this_id can be re-used. */
|
||
|
||
/* Static chain passed in register. */
|
||
|
||
struct i386_insn i386_tramp_chain_in_reg_insns[] =
|
||
{
|
||
/* `movl imm32, %eax' and `movl imm32, %ecx' */
|
||
{ 5, { 0xb8 }, { 0xfe } },
|
||
|
||
/* `jmp imm32' */
|
||
{ 5, { 0xe9 }, { 0xff } },
|
||
|
||
{0}
|
||
};
|
||
|
||
/* Static chain passed on stack (when regparm=3). */
|
||
|
||
struct i386_insn i386_tramp_chain_on_stack_insns[] =
|
||
{
|
||
/* `push imm32' */
|
||
{ 5, { 0x68 }, { 0xff } },
|
||
|
||
/* `jmp imm32' */
|
||
{ 5, { 0xe9 }, { 0xff } },
|
||
|
||
{0}
|
||
};
|
||
|
||
/* Return whether PC points inside a stack trampoline. */
|
||
|
||
static int
|
||
i386_in_stack_tramp_p (CORE_ADDR pc)
|
||
{
|
||
gdb_byte insn;
|
||
const char *name;
|
||
|
||
/* A stack trampoline is detected if no name is associated
|
||
to the current pc and if it points inside a trampoline
|
||
sequence. */
|
||
|
||
find_pc_partial_function (pc, &name, NULL, NULL);
|
||
if (name)
|
||
return 0;
|
||
|
||
if (target_read_memory (pc, &insn, 1))
|
||
return 0;
|
||
|
||
if (!i386_match_insn_block (pc, i386_tramp_chain_in_reg_insns)
|
||
&& !i386_match_insn_block (pc, i386_tramp_chain_on_stack_insns))
|
||
return 0;
|
||
|
||
return 1;
|
||
}
|
||
|
||
static int
|
||
i386_stack_tramp_frame_sniffer (const struct frame_unwind *self,
|
||
struct frame_info *this_frame,
|
||
void **this_cache)
|
||
{
|
||
if (frame_relative_level (this_frame) == 0)
|
||
return i386_in_stack_tramp_p (get_frame_pc (this_frame));
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
static const struct frame_unwind i386_stack_tramp_frame_unwind =
|
||
{
|
||
NORMAL_FRAME,
|
||
i386_epilogue_frame_unwind_stop_reason,
|
||
i386_epilogue_frame_this_id,
|
||
i386_epilogue_frame_prev_register,
|
||
NULL,
|
||
i386_stack_tramp_frame_sniffer
|
||
};
|
||
|
||
/* Generate a bytecode expression to get the value of the saved PC. */
|
||
|
||
static void
|
||
i386_gen_return_address (struct gdbarch *gdbarch,
|
||
struct agent_expr *ax, struct axs_value *value,
|
||
CORE_ADDR scope)
|
||
{
|
||
/* The following sequence assumes the traditional use of the base
|
||
register. */
|
||
ax_reg (ax, I386_EBP_REGNUM);
|
||
ax_const_l (ax, 4);
|
||
ax_simple (ax, aop_add);
|
||
value->type = register_type (gdbarch, I386_EIP_REGNUM);
|
||
value->kind = axs_lvalue_memory;
|
||
}
|
||
|
||
|
||
/* Signal trampolines. */
|
||
|
||
static struct i386_frame_cache *
|
||
i386_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
volatile struct gdb_exception ex;
|
||
struct i386_frame_cache *cache;
|
||
CORE_ADDR addr;
|
||
gdb_byte buf[4];
|
||
|
||
if (*this_cache)
|
||
return *this_cache;
|
||
|
||
cache = i386_alloc_frame_cache ();
|
||
|
||
TRY_CATCH (ex, RETURN_MASK_ERROR)
|
||
{
|
||
get_frame_register (this_frame, I386_ESP_REGNUM, buf);
|
||
cache->base = extract_unsigned_integer (buf, 4, byte_order) - 4;
|
||
|
||
addr = tdep->sigcontext_addr (this_frame);
|
||
if (tdep->sc_reg_offset)
|
||
{
|
||
int i;
|
||
|
||
gdb_assert (tdep->sc_num_regs <= I386_NUM_SAVED_REGS);
|
||
|
||
for (i = 0; i < tdep->sc_num_regs; i++)
|
||
if (tdep->sc_reg_offset[i] != -1)
|
||
cache->saved_regs[i] = addr + tdep->sc_reg_offset[i];
|
||
}
|
||
else
|
||
{
|
||
cache->saved_regs[I386_EIP_REGNUM] = addr + tdep->sc_pc_offset;
|
||
cache->saved_regs[I386_ESP_REGNUM] = addr + tdep->sc_sp_offset;
|
||
}
|
||
|
||
cache->base_p = 1;
|
||
}
|
||
if (ex.reason < 0 && ex.error != NOT_AVAILABLE_ERROR)
|
||
throw_exception (ex);
|
||
|
||
*this_cache = cache;
|
||
return cache;
|
||
}
|
||
|
||
static enum unwind_stop_reason
|
||
i386_sigtramp_frame_unwind_stop_reason (struct frame_info *this_frame,
|
||
void **this_cache)
|
||
{
|
||
struct i386_frame_cache *cache =
|
||
i386_sigtramp_frame_cache (this_frame, this_cache);
|
||
|
||
if (!cache->base_p)
|
||
return UNWIND_UNAVAILABLE;
|
||
|
||
return UNWIND_NO_REASON;
|
||
}
|
||
|
||
static void
|
||
i386_sigtramp_frame_this_id (struct frame_info *this_frame, void **this_cache,
|
||
struct frame_id *this_id)
|
||
{
|
||
struct i386_frame_cache *cache =
|
||
i386_sigtramp_frame_cache (this_frame, this_cache);
|
||
|
||
if (!cache->base_p)
|
||
(*this_id) = frame_id_build_unavailable_stack (get_frame_pc (this_frame));
|
||
else
|
||
{
|
||
/* See the end of i386_push_dummy_call. */
|
||
(*this_id) = frame_id_build (cache->base + 8, get_frame_pc (this_frame));
|
||
}
|
||
}
|
||
|
||
static struct value *
|
||
i386_sigtramp_frame_prev_register (struct frame_info *this_frame,
|
||
void **this_cache, int regnum)
|
||
{
|
||
/* Make sure we've initialized the cache. */
|
||
i386_sigtramp_frame_cache (this_frame, this_cache);
|
||
|
||
return i386_frame_prev_register (this_frame, this_cache, regnum);
|
||
}
|
||
|
||
static int
|
||
i386_sigtramp_frame_sniffer (const struct frame_unwind *self,
|
||
struct frame_info *this_frame,
|
||
void **this_prologue_cache)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
|
||
|
||
/* We shouldn't even bother if we don't have a sigcontext_addr
|
||
handler. */
|
||
if (tdep->sigcontext_addr == NULL)
|
||
return 0;
|
||
|
||
if (tdep->sigtramp_p != NULL)
|
||
{
|
||
if (tdep->sigtramp_p (this_frame))
|
||
return 1;
|
||
}
|
||
|
||
if (tdep->sigtramp_start != 0)
|
||
{
|
||
CORE_ADDR pc = get_frame_pc (this_frame);
|
||
|
||
gdb_assert (tdep->sigtramp_end != 0);
|
||
if (pc >= tdep->sigtramp_start && pc < tdep->sigtramp_end)
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static const struct frame_unwind i386_sigtramp_frame_unwind =
|
||
{
|
||
SIGTRAMP_FRAME,
|
||
i386_sigtramp_frame_unwind_stop_reason,
|
||
i386_sigtramp_frame_this_id,
|
||
i386_sigtramp_frame_prev_register,
|
||
NULL,
|
||
i386_sigtramp_frame_sniffer
|
||
};
|
||
|
||
|
||
static CORE_ADDR
|
||
i386_frame_base_address (struct frame_info *this_frame, void **this_cache)
|
||
{
|
||
struct i386_frame_cache *cache = i386_frame_cache (this_frame, this_cache);
|
||
|
||
return cache->base;
|
||
}
|
||
|
||
static const struct frame_base i386_frame_base =
|
||
{
|
||
&i386_frame_unwind,
|
||
i386_frame_base_address,
|
||
i386_frame_base_address,
|
||
i386_frame_base_address
|
||
};
|
||
|
||
static struct frame_id
|
||
i386_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
|
||
{
|
||
CORE_ADDR fp;
|
||
|
||
fp = get_frame_register_unsigned (this_frame, I386_EBP_REGNUM);
|
||
|
||
/* See the end of i386_push_dummy_call. */
|
||
return frame_id_build (fp + 8, get_frame_pc (this_frame));
|
||
}
|
||
|
||
/* _Decimal128 function return values need 16-byte alignment on the
|
||
stack. */
|
||
|
||
static CORE_ADDR
|
||
i386_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
|
||
{
|
||
return sp & -(CORE_ADDR)16;
|
||
}
|
||
|
||
|
||
/* Figure out where the longjmp will land. Slurp the args out of the
|
||
stack. We expect the first arg to be a pointer to the jmp_buf
|
||
structure from which we extract the address that we will land at.
|
||
This address is copied into PC. This routine returns non-zero on
|
||
success. */
|
||
|
||
static int
|
||
i386_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
|
||
{
|
||
gdb_byte buf[4];
|
||
CORE_ADDR sp, jb_addr;
|
||
struct gdbarch *gdbarch = get_frame_arch (frame);
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
int jb_pc_offset = gdbarch_tdep (gdbarch)->jb_pc_offset;
|
||
|
||
/* If JB_PC_OFFSET is -1, we have no way to find out where the
|
||
longjmp will land. */
|
||
if (jb_pc_offset == -1)
|
||
return 0;
|
||
|
||
get_frame_register (frame, I386_ESP_REGNUM, buf);
|
||
sp = extract_unsigned_integer (buf, 4, byte_order);
|
||
if (target_read_memory (sp + 4, buf, 4))
|
||
return 0;
|
||
|
||
jb_addr = extract_unsigned_integer (buf, 4, byte_order);
|
||
if (target_read_memory (jb_addr + jb_pc_offset, buf, 4))
|
||
return 0;
|
||
|
||
*pc = extract_unsigned_integer (buf, 4, byte_order);
|
||
return 1;
|
||
}
|
||
|
||
|
||
/* Check whether TYPE must be 16-byte-aligned when passed as a
|
||
function argument. 16-byte vectors, _Decimal128 and structures or
|
||
unions containing such types must be 16-byte-aligned; other
|
||
arguments are 4-byte-aligned. */
|
||
|
||
static int
|
||
i386_16_byte_align_p (struct type *type)
|
||
{
|
||
type = check_typedef (type);
|
||
if ((TYPE_CODE (type) == TYPE_CODE_DECFLOAT
|
||
|| (TYPE_CODE (type) == TYPE_CODE_ARRAY && TYPE_VECTOR (type)))
|
||
&& TYPE_LENGTH (type) == 16)
|
||
return 1;
|
||
if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
|
||
return i386_16_byte_align_p (TYPE_TARGET_TYPE (type));
|
||
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
|
||
|| TYPE_CODE (type) == TYPE_CODE_UNION)
|
||
{
|
||
int i;
|
||
for (i = 0; i < TYPE_NFIELDS (type); i++)
|
||
{
|
||
if (i386_16_byte_align_p (TYPE_FIELD_TYPE (type, i)))
|
||
return 1;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Implementation for set_gdbarch_push_dummy_code. */
|
||
|
||
static CORE_ADDR
|
||
i386_push_dummy_code (struct gdbarch *gdbarch, CORE_ADDR sp, CORE_ADDR funaddr,
|
||
struct value **args, int nargs, struct type *value_type,
|
||
CORE_ADDR *real_pc, CORE_ADDR *bp_addr,
|
||
struct regcache *regcache)
|
||
{
|
||
/* Use 0xcc breakpoint - 1 byte. */
|
||
*bp_addr = sp - 1;
|
||
*real_pc = funaddr;
|
||
|
||
/* Keep the stack aligned. */
|
||
return sp - 16;
|
||
}
|
||
|
||
static CORE_ADDR
|
||
i386_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
|
||
struct regcache *regcache, CORE_ADDR bp_addr, int nargs,
|
||
struct value **args, CORE_ADDR sp, int struct_return,
|
||
CORE_ADDR struct_addr)
|
||
{
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
gdb_byte buf[4];
|
||
int i;
|
||
int write_pass;
|
||
int args_space = 0;
|
||
|
||
/* Determine the total space required for arguments and struct
|
||
return address in a first pass (allowing for 16-byte-aligned
|
||
arguments), then push arguments in a second pass. */
|
||
|
||
for (write_pass = 0; write_pass < 2; write_pass++)
|
||
{
|
||
int args_space_used = 0;
|
||
|
||
if (struct_return)
|
||
{
|
||
if (write_pass)
|
||
{
|
||
/* Push value address. */
|
||
store_unsigned_integer (buf, 4, byte_order, struct_addr);
|
||
write_memory (sp, buf, 4);
|
||
args_space_used += 4;
|
||
}
|
||
else
|
||
args_space += 4;
|
||
}
|
||
|
||
for (i = 0; i < nargs; i++)
|
||
{
|
||
int len = TYPE_LENGTH (value_enclosing_type (args[i]));
|
||
|
||
if (write_pass)
|
||
{
|
||
if (i386_16_byte_align_p (value_enclosing_type (args[i])))
|
||
args_space_used = align_up (args_space_used, 16);
|
||
|
||
write_memory (sp + args_space_used,
|
||
value_contents_all (args[i]), len);
|
||
/* The System V ABI says that:
|
||
|
||
"An argument's size is increased, if necessary, to make it a
|
||
multiple of [32-bit] words. This may require tail padding,
|
||
depending on the size of the argument."
|
||
|
||
This makes sure the stack stays word-aligned. */
|
||
args_space_used += align_up (len, 4);
|
||
}
|
||
else
|
||
{
|
||
if (i386_16_byte_align_p (value_enclosing_type (args[i])))
|
||
args_space = align_up (args_space, 16);
|
||
args_space += align_up (len, 4);
|
||
}
|
||
}
|
||
|
||
if (!write_pass)
|
||
{
|
||
sp -= args_space;
|
||
|
||
/* The original System V ABI only requires word alignment,
|
||
but modern incarnations need 16-byte alignment in order
|
||
to support SSE. Since wasting a few bytes here isn't
|
||
harmful we unconditionally enforce 16-byte alignment. */
|
||
sp &= ~0xf;
|
||
}
|
||
}
|
||
|
||
/* Store return address. */
|
||
sp -= 4;
|
||
store_unsigned_integer (buf, 4, byte_order, bp_addr);
|
||
write_memory (sp, buf, 4);
|
||
|
||
/* Finally, update the stack pointer... */
|
||
store_unsigned_integer (buf, 4, byte_order, sp);
|
||
regcache_cooked_write (regcache, I386_ESP_REGNUM, buf);
|
||
|
||
/* ...and fake a frame pointer. */
|
||
regcache_cooked_write (regcache, I386_EBP_REGNUM, buf);
|
||
|
||
/* MarkK wrote: This "+ 8" is all over the place:
|
||
(i386_frame_this_id, i386_sigtramp_frame_this_id,
|
||
i386_dummy_id). It's there, since all frame unwinders for
|
||
a given target have to agree (within a certain margin) on the
|
||
definition of the stack address of a frame. Otherwise frame id
|
||
comparison might not work correctly. Since DWARF2/GCC uses the
|
||
stack address *before* the function call as a frame's CFA. On
|
||
the i386, when %ebp is used as a frame pointer, the offset
|
||
between the contents %ebp and the CFA as defined by GCC. */
|
||
return sp + 8;
|
||
}
|
||
|
||
/* These registers are used for returning integers (and on some
|
||
targets also for returning `struct' and `union' values when their
|
||
size and alignment match an integer type). */
|
||
#define LOW_RETURN_REGNUM I386_EAX_REGNUM /* %eax */
|
||
#define HIGH_RETURN_REGNUM I386_EDX_REGNUM /* %edx */
|
||
|
||
/* Read, for architecture GDBARCH, a function return value of TYPE
|
||
from REGCACHE, and copy that into VALBUF. */
|
||
|
||
static void
|
||
i386_extract_return_value (struct gdbarch *gdbarch, struct type *type,
|
||
struct regcache *regcache, gdb_byte *valbuf)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
int len = TYPE_LENGTH (type);
|
||
gdb_byte buf[I386_MAX_REGISTER_SIZE];
|
||
|
||
if (TYPE_CODE (type) == TYPE_CODE_FLT)
|
||
{
|
||
if (tdep->st0_regnum < 0)
|
||
{
|
||
warning (_("Cannot find floating-point return value."));
|
||
memset (valbuf, 0, len);
|
||
return;
|
||
}
|
||
|
||
/* Floating-point return values can be found in %st(0). Convert
|
||
its contents to the desired type. This is probably not
|
||
exactly how it would happen on the target itself, but it is
|
||
the best we can do. */
|
||
regcache_raw_read (regcache, I386_ST0_REGNUM, buf);
|
||
convert_typed_floating (buf, i387_ext_type (gdbarch), valbuf, type);
|
||
}
|
||
else
|
||
{
|
||
int low_size = register_size (gdbarch, LOW_RETURN_REGNUM);
|
||
int high_size = register_size (gdbarch, HIGH_RETURN_REGNUM);
|
||
|
||
if (len <= low_size)
|
||
{
|
||
regcache_raw_read (regcache, LOW_RETURN_REGNUM, buf);
|
||
memcpy (valbuf, buf, len);
|
||
}
|
||
else if (len <= (low_size + high_size))
|
||
{
|
||
regcache_raw_read (regcache, LOW_RETURN_REGNUM, buf);
|
||
memcpy (valbuf, buf, low_size);
|
||
regcache_raw_read (regcache, HIGH_RETURN_REGNUM, buf);
|
||
memcpy (valbuf + low_size, buf, len - low_size);
|
||
}
|
||
else
|
||
internal_error (__FILE__, __LINE__,
|
||
_("Cannot extract return value of %d bytes long."),
|
||
len);
|
||
}
|
||
}
|
||
|
||
/* Write, for architecture GDBARCH, a function return value of TYPE
|
||
from VALBUF into REGCACHE. */
|
||
|
||
static void
|
||
i386_store_return_value (struct gdbarch *gdbarch, struct type *type,
|
||
struct regcache *regcache, const gdb_byte *valbuf)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
int len = TYPE_LENGTH (type);
|
||
|
||
if (TYPE_CODE (type) == TYPE_CODE_FLT)
|
||
{
|
||
ULONGEST fstat;
|
||
gdb_byte buf[I386_MAX_REGISTER_SIZE];
|
||
|
||
if (tdep->st0_regnum < 0)
|
||
{
|
||
warning (_("Cannot set floating-point return value."));
|
||
return;
|
||
}
|
||
|
||
/* Returning floating-point values is a bit tricky. Apart from
|
||
storing the return value in %st(0), we have to simulate the
|
||
state of the FPU at function return point. */
|
||
|
||
/* Convert the value found in VALBUF to the extended
|
||
floating-point format used by the FPU. This is probably
|
||
not exactly how it would happen on the target itself, but
|
||
it is the best we can do. */
|
||
convert_typed_floating (valbuf, type, buf, i387_ext_type (gdbarch));
|
||
regcache_raw_write (regcache, I386_ST0_REGNUM, buf);
|
||
|
||
/* Set the top of the floating-point register stack to 7. The
|
||
actual value doesn't really matter, but 7 is what a normal
|
||
function return would end up with if the program started out
|
||
with a freshly initialized FPU. */
|
||
regcache_raw_read_unsigned (regcache, I387_FSTAT_REGNUM (tdep), &fstat);
|
||
fstat |= (7 << 11);
|
||
regcache_raw_write_unsigned (regcache, I387_FSTAT_REGNUM (tdep), fstat);
|
||
|
||
/* Mark %st(1) through %st(7) as empty. Since we set the top of
|
||
the floating-point register stack to 7, the appropriate value
|
||
for the tag word is 0x3fff. */
|
||
regcache_raw_write_unsigned (regcache, I387_FTAG_REGNUM (tdep), 0x3fff);
|
||
}
|
||
else
|
||
{
|
||
int low_size = register_size (gdbarch, LOW_RETURN_REGNUM);
|
||
int high_size = register_size (gdbarch, HIGH_RETURN_REGNUM);
|
||
|
||
if (len <= low_size)
|
||
regcache_raw_write_part (regcache, LOW_RETURN_REGNUM, 0, len, valbuf);
|
||
else if (len <= (low_size + high_size))
|
||
{
|
||
regcache_raw_write (regcache, LOW_RETURN_REGNUM, valbuf);
|
||
regcache_raw_write_part (regcache, HIGH_RETURN_REGNUM, 0,
|
||
len - low_size, valbuf + low_size);
|
||
}
|
||
else
|
||
internal_error (__FILE__, __LINE__,
|
||
_("Cannot store return value of %d bytes long."), len);
|
||
}
|
||
}
|
||
|
||
|
||
/* This is the variable that is set with "set struct-convention", and
|
||
its legitimate values. */
|
||
static const char default_struct_convention[] = "default";
|
||
static const char pcc_struct_convention[] = "pcc";
|
||
static const char reg_struct_convention[] = "reg";
|
||
static const char *const valid_conventions[] =
|
||
{
|
||
default_struct_convention,
|
||
pcc_struct_convention,
|
||
reg_struct_convention,
|
||
NULL
|
||
};
|
||
static const char *struct_convention = default_struct_convention;
|
||
|
||
/* Return non-zero if TYPE, which is assumed to be a structure,
|
||
a union type, or an array type, should be returned in registers
|
||
for architecture GDBARCH. */
|
||
|
||
static int
|
||
i386_reg_struct_return_p (struct gdbarch *gdbarch, struct type *type)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
enum type_code code = TYPE_CODE (type);
|
||
int len = TYPE_LENGTH (type);
|
||
|
||
gdb_assert (code == TYPE_CODE_STRUCT
|
||
|| code == TYPE_CODE_UNION
|
||
|| code == TYPE_CODE_ARRAY);
|
||
|
||
if (struct_convention == pcc_struct_convention
|
||
|| (struct_convention == default_struct_convention
|
||
&& tdep->struct_return == pcc_struct_return))
|
||
return 0;
|
||
|
||
/* Structures consisting of a single `float', `double' or 'long
|
||
double' member are returned in %st(0). */
|
||
if (code == TYPE_CODE_STRUCT && TYPE_NFIELDS (type) == 1)
|
||
{
|
||
type = check_typedef (TYPE_FIELD_TYPE (type, 0));
|
||
if (TYPE_CODE (type) == TYPE_CODE_FLT)
|
||
return (len == 4 || len == 8 || len == 12);
|
||
}
|
||
|
||
return (len == 1 || len == 2 || len == 4 || len == 8);
|
||
}
|
||
|
||
/* Determine, for architecture GDBARCH, how a return value of TYPE
|
||
should be returned. If it is supposed to be returned in registers,
|
||
and READBUF is non-zero, read the appropriate value from REGCACHE,
|
||
and copy it into READBUF. If WRITEBUF is non-zero, write the value
|
||
from WRITEBUF into REGCACHE. */
|
||
|
||
static enum return_value_convention
|
||
i386_return_value (struct gdbarch *gdbarch, struct value *function,
|
||
struct type *type, struct regcache *regcache,
|
||
gdb_byte *readbuf, const gdb_byte *writebuf)
|
||
{
|
||
enum type_code code = TYPE_CODE (type);
|
||
|
||
if (((code == TYPE_CODE_STRUCT
|
||
|| code == TYPE_CODE_UNION
|
||
|| code == TYPE_CODE_ARRAY)
|
||
&& !i386_reg_struct_return_p (gdbarch, type))
|
||
/* Complex double and long double uses the struct return covention. */
|
||
|| (code == TYPE_CODE_COMPLEX && TYPE_LENGTH (type) == 16)
|
||
|| (code == TYPE_CODE_COMPLEX && TYPE_LENGTH (type) == 24)
|
||
/* 128-bit decimal float uses the struct return convention. */
|
||
|| (code == TYPE_CODE_DECFLOAT && TYPE_LENGTH (type) == 16))
|
||
{
|
||
/* The System V ABI says that:
|
||
|
||
"A function that returns a structure or union also sets %eax
|
||
to the value of the original address of the caller's area
|
||
before it returns. Thus when the caller receives control
|
||
again, the address of the returned object resides in register
|
||
%eax and can be used to access the object."
|
||
|
||
So the ABI guarantees that we can always find the return
|
||
value just after the function has returned. */
|
||
|
||
/* Note that the ABI doesn't mention functions returning arrays,
|
||
which is something possible in certain languages such as Ada.
|
||
In this case, the value is returned as if it was wrapped in
|
||
a record, so the convention applied to records also applies
|
||
to arrays. */
|
||
|
||
if (readbuf)
|
||
{
|
||
ULONGEST addr;
|
||
|
||
regcache_raw_read_unsigned (regcache, I386_EAX_REGNUM, &addr);
|
||
read_memory (addr, readbuf, TYPE_LENGTH (type));
|
||
}
|
||
|
||
return RETURN_VALUE_ABI_RETURNS_ADDRESS;
|
||
}
|
||
|
||
/* This special case is for structures consisting of a single
|
||
`float', `double' or 'long double' member. These structures are
|
||
returned in %st(0). For these structures, we call ourselves
|
||
recursively, changing TYPE into the type of the first member of
|
||
the structure. Since that should work for all structures that
|
||
have only one member, we don't bother to check the member's type
|
||
here. */
|
||
if (code == TYPE_CODE_STRUCT && TYPE_NFIELDS (type) == 1)
|
||
{
|
||
type = check_typedef (TYPE_FIELD_TYPE (type, 0));
|
||
return i386_return_value (gdbarch, function, type, regcache,
|
||
readbuf, writebuf);
|
||
}
|
||
|
||
if (readbuf)
|
||
i386_extract_return_value (gdbarch, type, regcache, readbuf);
|
||
if (writebuf)
|
||
i386_store_return_value (gdbarch, type, regcache, writebuf);
|
||
|
||
return RETURN_VALUE_REGISTER_CONVENTION;
|
||
}
|
||
|
||
|
||
struct type *
|
||
i387_ext_type (struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
if (!tdep->i387_ext_type)
|
||
{
|
||
tdep->i387_ext_type = tdesc_find_type (gdbarch, "i387_ext");
|
||
gdb_assert (tdep->i387_ext_type != NULL);
|
||
}
|
||
|
||
return tdep->i387_ext_type;
|
||
}
|
||
|
||
/* Construct type for pseudo BND registers. We can't use
|
||
tdesc_find_type since a complement of one value has to be used
|
||
to describe the upper bound. */
|
||
|
||
static struct type *
|
||
i386_bnd_type (struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
|
||
if (!tdep->i386_bnd_type)
|
||
{
|
||
struct type *t, *bound_t;
|
||
const struct builtin_type *bt = builtin_type (gdbarch);
|
||
|
||
/* The type we're building is described bellow: */
|
||
#if 0
|
||
struct __bound128
|
||
{
|
||
void *lbound;
|
||
void *ubound; /* One complement of raw ubound field. */
|
||
};
|
||
#endif
|
||
|
||
t = arch_composite_type (gdbarch,
|
||
"__gdb_builtin_type_bound128", TYPE_CODE_STRUCT);
|
||
|
||
append_composite_type_field (t, "lbound", bt->builtin_data_ptr);
|
||
append_composite_type_field (t, "ubound", bt->builtin_data_ptr);
|
||
|
||
TYPE_NAME (t) = "builtin_type_bound128";
|
||
tdep->i386_bnd_type = t;
|
||
}
|
||
|
||
return tdep->i386_bnd_type;
|
||
}
|
||
|
||
/* Construct vector type for pseudo YMM registers. We can't use
|
||
tdesc_find_type since YMM isn't described in target description. */
|
||
|
||
static struct type *
|
||
i386_ymm_type (struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
if (!tdep->i386_ymm_type)
|
||
{
|
||
const struct builtin_type *bt = builtin_type (gdbarch);
|
||
|
||
/* The type we're building is this: */
|
||
#if 0
|
||
union __gdb_builtin_type_vec256i
|
||
{
|
||
int128_t uint128[2];
|
||
int64_t v2_int64[4];
|
||
int32_t v4_int32[8];
|
||
int16_t v8_int16[16];
|
||
int8_t v16_int8[32];
|
||
double v2_double[4];
|
||
float v4_float[8];
|
||
};
|
||
#endif
|
||
|
||
struct type *t;
|
||
|
||
t = arch_composite_type (gdbarch,
|
||
"__gdb_builtin_type_vec256i", TYPE_CODE_UNION);
|
||
append_composite_type_field (t, "v8_float",
|
||
init_vector_type (bt->builtin_float, 8));
|
||
append_composite_type_field (t, "v4_double",
|
||
init_vector_type (bt->builtin_double, 4));
|
||
append_composite_type_field (t, "v32_int8",
|
||
init_vector_type (bt->builtin_int8, 32));
|
||
append_composite_type_field (t, "v16_int16",
|
||
init_vector_type (bt->builtin_int16, 16));
|
||
append_composite_type_field (t, "v8_int32",
|
||
init_vector_type (bt->builtin_int32, 8));
|
||
append_composite_type_field (t, "v4_int64",
|
||
init_vector_type (bt->builtin_int64, 4));
|
||
append_composite_type_field (t, "v2_int128",
|
||
init_vector_type (bt->builtin_int128, 2));
|
||
|
||
TYPE_VECTOR (t) = 1;
|
||
TYPE_NAME (t) = "builtin_type_vec256i";
|
||
tdep->i386_ymm_type = t;
|
||
}
|
||
|
||
return tdep->i386_ymm_type;
|
||
}
|
||
|
||
/* Construct vector type for MMX registers. */
|
||
static struct type *
|
||
i386_mmx_type (struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
if (!tdep->i386_mmx_type)
|
||
{
|
||
const struct builtin_type *bt = builtin_type (gdbarch);
|
||
|
||
/* The type we're building is this: */
|
||
#if 0
|
||
union __gdb_builtin_type_vec64i
|
||
{
|
||
int64_t uint64;
|
||
int32_t v2_int32[2];
|
||
int16_t v4_int16[4];
|
||
int8_t v8_int8[8];
|
||
};
|
||
#endif
|
||
|
||
struct type *t;
|
||
|
||
t = arch_composite_type (gdbarch,
|
||
"__gdb_builtin_type_vec64i", TYPE_CODE_UNION);
|
||
|
||
append_composite_type_field (t, "uint64", bt->builtin_int64);
|
||
append_composite_type_field (t, "v2_int32",
|
||
init_vector_type (bt->builtin_int32, 2));
|
||
append_composite_type_field (t, "v4_int16",
|
||
init_vector_type (bt->builtin_int16, 4));
|
||
append_composite_type_field (t, "v8_int8",
|
||
init_vector_type (bt->builtin_int8, 8));
|
||
|
||
TYPE_VECTOR (t) = 1;
|
||
TYPE_NAME (t) = "builtin_type_vec64i";
|
||
tdep->i386_mmx_type = t;
|
||
}
|
||
|
||
return tdep->i386_mmx_type;
|
||
}
|
||
|
||
/* Return the GDB type object for the "standard" data type of data in
|
||
register REGNUM. */
|
||
|
||
struct type *
|
||
i386_pseudo_register_type (struct gdbarch *gdbarch, int regnum)
|
||
{
|
||
if (i386_bnd_regnum_p (gdbarch, regnum))
|
||
return i386_bnd_type (gdbarch);
|
||
if (i386_mmx_regnum_p (gdbarch, regnum))
|
||
return i386_mmx_type (gdbarch);
|
||
else if (i386_ymm_regnum_p (gdbarch, regnum))
|
||
return i386_ymm_type (gdbarch);
|
||
else
|
||
{
|
||
const struct builtin_type *bt = builtin_type (gdbarch);
|
||
if (i386_byte_regnum_p (gdbarch, regnum))
|
||
return bt->builtin_int8;
|
||
else if (i386_word_regnum_p (gdbarch, regnum))
|
||
return bt->builtin_int16;
|
||
else if (i386_dword_regnum_p (gdbarch, regnum))
|
||
return bt->builtin_int32;
|
||
}
|
||
|
||
internal_error (__FILE__, __LINE__, _("invalid regnum"));
|
||
}
|
||
|
||
/* Map a cooked register onto a raw register or memory. For the i386,
|
||
the MMX registers need to be mapped onto floating point registers. */
|
||
|
||
static int
|
||
i386_mmx_regnum_to_fp_regnum (struct regcache *regcache, int regnum)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
|
||
int mmxreg, fpreg;
|
||
ULONGEST fstat;
|
||
int tos;
|
||
|
||
mmxreg = regnum - tdep->mm0_regnum;
|
||
regcache_raw_read_unsigned (regcache, I387_FSTAT_REGNUM (tdep), &fstat);
|
||
tos = (fstat >> 11) & 0x7;
|
||
fpreg = (mmxreg + tos) % 8;
|
||
|
||
return (I387_ST0_REGNUM (tdep) + fpreg);
|
||
}
|
||
|
||
/* A helper function for us by i386_pseudo_register_read_value and
|
||
amd64_pseudo_register_read_value. It does all the work but reads
|
||
the data into an already-allocated value. */
|
||
|
||
void
|
||
i386_pseudo_register_read_into_value (struct gdbarch *gdbarch,
|
||
struct regcache *regcache,
|
||
int regnum,
|
||
struct value *result_value)
|
||
{
|
||
gdb_byte raw_buf[MAX_REGISTER_SIZE];
|
||
enum register_status status;
|
||
gdb_byte *buf = value_contents_raw (result_value);
|
||
|
||
if (i386_mmx_regnum_p (gdbarch, regnum))
|
||
{
|
||
int fpnum = i386_mmx_regnum_to_fp_regnum (regcache, regnum);
|
||
|
||
/* Extract (always little endian). */
|
||
status = regcache_raw_read (regcache, fpnum, raw_buf);
|
||
if (status != REG_VALID)
|
||
mark_value_bytes_unavailable (result_value, 0,
|
||
TYPE_LENGTH (value_type (result_value)));
|
||
else
|
||
memcpy (buf, raw_buf, register_size (gdbarch, regnum));
|
||
}
|
||
else
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
if (i386_bnd_regnum_p (gdbarch, regnum))
|
||
{
|
||
regnum -= tdep->bnd0_regnum;
|
||
|
||
/* Extract (always little endian). Read lower 128bits. */
|
||
status = regcache_raw_read (regcache,
|
||
I387_BND0R_REGNUM (tdep) + regnum,
|
||
raw_buf);
|
||
if (status != REG_VALID)
|
||
mark_value_bytes_unavailable (result_value, 0, 16);
|
||
else
|
||
{
|
||
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
|
||
LONGEST upper, lower;
|
||
int size = TYPE_LENGTH (builtin_type (gdbarch)->builtin_data_ptr);
|
||
|
||
lower = extract_unsigned_integer (raw_buf, 8, byte_order);
|
||
upper = extract_unsigned_integer (raw_buf + 8, 8, byte_order);
|
||
upper = ~upper;
|
||
|
||
memcpy (buf, &lower, size);
|
||
memcpy (buf + size, &upper, size);
|
||
}
|
||
}
|
||
else if (i386_ymm_regnum_p (gdbarch, regnum))
|
||
{
|
||
regnum -= tdep->ymm0_regnum;
|
||
|
||
/* Extract (always little endian). Read lower 128bits. */
|
||
status = regcache_raw_read (regcache,
|
||
I387_XMM0_REGNUM (tdep) + regnum,
|
||
raw_buf);
|
||
if (status != REG_VALID)
|
||
mark_value_bytes_unavailable (result_value, 0, 16);
|
||
else
|
||
memcpy (buf, raw_buf, 16);
|
||
/* Read upper 128bits. */
|
||
status = regcache_raw_read (regcache,
|
||
tdep->ymm0h_regnum + regnum,
|
||
raw_buf);
|
||
if (status != REG_VALID)
|
||
mark_value_bytes_unavailable (result_value, 16, 32);
|
||
else
|
||
memcpy (buf + 16, raw_buf, 16);
|
||
}
|
||
else if (i386_word_regnum_p (gdbarch, regnum))
|
||
{
|
||
int gpnum = regnum - tdep->ax_regnum;
|
||
|
||
/* Extract (always little endian). */
|
||
status = regcache_raw_read (regcache, gpnum, raw_buf);
|
||
if (status != REG_VALID)
|
||
mark_value_bytes_unavailable (result_value, 0,
|
||
TYPE_LENGTH (value_type (result_value)));
|
||
else
|
||
memcpy (buf, raw_buf, 2);
|
||
}
|
||
else if (i386_byte_regnum_p (gdbarch, regnum))
|
||
{
|
||
/* Check byte pseudo registers last since this function will
|
||
be called from amd64_pseudo_register_read, which handles
|
||
byte pseudo registers differently. */
|
||
int gpnum = regnum - tdep->al_regnum;
|
||
|
||
/* Extract (always little endian). We read both lower and
|
||
upper registers. */
|
||
status = regcache_raw_read (regcache, gpnum % 4, raw_buf);
|
||
if (status != REG_VALID)
|
||
mark_value_bytes_unavailable (result_value, 0,
|
||
TYPE_LENGTH (value_type (result_value)));
|
||
else if (gpnum >= 4)
|
||
memcpy (buf, raw_buf + 1, 1);
|
||
else
|
||
memcpy (buf, raw_buf, 1);
|
||
}
|
||
else
|
||
internal_error (__FILE__, __LINE__, _("invalid regnum"));
|
||
}
|
||
}
|
||
|
||
static struct value *
|
||
i386_pseudo_register_read_value (struct gdbarch *gdbarch,
|
||
struct regcache *regcache,
|
||
int regnum)
|
||
{
|
||
struct value *result;
|
||
|
||
result = allocate_value (register_type (gdbarch, regnum));
|
||
VALUE_LVAL (result) = lval_register;
|
||
VALUE_REGNUM (result) = regnum;
|
||
|
||
i386_pseudo_register_read_into_value (gdbarch, regcache, regnum, result);
|
||
|
||
return result;
|
||
}
|
||
|
||
void
|
||
i386_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
|
||
int regnum, const gdb_byte *buf)
|
||
{
|
||
gdb_byte raw_buf[MAX_REGISTER_SIZE];
|
||
|
||
if (i386_mmx_regnum_p (gdbarch, regnum))
|
||
{
|
||
int fpnum = i386_mmx_regnum_to_fp_regnum (regcache, regnum);
|
||
|
||
/* Read ... */
|
||
regcache_raw_read (regcache, fpnum, raw_buf);
|
||
/* ... Modify ... (always little endian). */
|
||
memcpy (raw_buf, buf, register_size (gdbarch, regnum));
|
||
/* ... Write. */
|
||
regcache_raw_write (regcache, fpnum, raw_buf);
|
||
}
|
||
else
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
if (i386_bnd_regnum_p (gdbarch, regnum))
|
||
{
|
||
ULONGEST upper, lower;
|
||
int size = TYPE_LENGTH (builtin_type (gdbarch)->builtin_data_ptr);
|
||
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
|
||
|
||
/* New values from input value. */
|
||
regnum -= tdep->bnd0_regnum;
|
||
lower = extract_unsigned_integer (buf, size, byte_order);
|
||
upper = extract_unsigned_integer (buf + size, size, byte_order);
|
||
|
||
/* Fetching register buffer. */
|
||
regcache_raw_read (regcache,
|
||
I387_BND0R_REGNUM (tdep) + regnum,
|
||
raw_buf);
|
||
|
||
upper = ~upper;
|
||
|
||
/* Set register bits. */
|
||
memcpy (raw_buf, &lower, 8);
|
||
memcpy (raw_buf + 8, &upper, 8);
|
||
|
||
|
||
regcache_raw_write (regcache,
|
||
I387_BND0R_REGNUM (tdep) + regnum,
|
||
raw_buf);
|
||
}
|
||
else if (i386_ymm_regnum_p (gdbarch, regnum))
|
||
{
|
||
regnum -= tdep->ymm0_regnum;
|
||
|
||
/* ... Write lower 128bits. */
|
||
regcache_raw_write (regcache,
|
||
I387_XMM0_REGNUM (tdep) + regnum,
|
||
buf);
|
||
/* ... Write upper 128bits. */
|
||
regcache_raw_write (regcache,
|
||
tdep->ymm0h_regnum + regnum,
|
||
buf + 16);
|
||
}
|
||
else if (i386_word_regnum_p (gdbarch, regnum))
|
||
{
|
||
int gpnum = regnum - tdep->ax_regnum;
|
||
|
||
/* Read ... */
|
||
regcache_raw_read (regcache, gpnum, raw_buf);
|
||
/* ... Modify ... (always little endian). */
|
||
memcpy (raw_buf, buf, 2);
|
||
/* ... Write. */
|
||
regcache_raw_write (regcache, gpnum, raw_buf);
|
||
}
|
||
else if (i386_byte_regnum_p (gdbarch, regnum))
|
||
{
|
||
/* Check byte pseudo registers last since this function will
|
||
be called from amd64_pseudo_register_read, which handles
|
||
byte pseudo registers differently. */
|
||
int gpnum = regnum - tdep->al_regnum;
|
||
|
||
/* Read ... We read both lower and upper registers. */
|
||
regcache_raw_read (regcache, gpnum % 4, raw_buf);
|
||
/* ... Modify ... (always little endian). */
|
||
if (gpnum >= 4)
|
||
memcpy (raw_buf + 1, buf, 1);
|
||
else
|
||
memcpy (raw_buf, buf, 1);
|
||
/* ... Write. */
|
||
regcache_raw_write (regcache, gpnum % 4, raw_buf);
|
||
}
|
||
else
|
||
internal_error (__FILE__, __LINE__, _("invalid regnum"));
|
||
}
|
||
}
|
||
|
||
|
||
/* Return the register number of the register allocated by GCC after
|
||
REGNUM, or -1 if there is no such register. */
|
||
|
||
static int
|
||
i386_next_regnum (int regnum)
|
||
{
|
||
/* GCC allocates the registers in the order:
|
||
|
||
%eax, %edx, %ecx, %ebx, %esi, %edi, %ebp, %esp, ...
|
||
|
||
Since storing a variable in %esp doesn't make any sense we return
|
||
-1 for %ebp and for %esp itself. */
|
||
static int next_regnum[] =
|
||
{
|
||
I386_EDX_REGNUM, /* Slot for %eax. */
|
||
I386_EBX_REGNUM, /* Slot for %ecx. */
|
||
I386_ECX_REGNUM, /* Slot for %edx. */
|
||
I386_ESI_REGNUM, /* Slot for %ebx. */
|
||
-1, -1, /* Slots for %esp and %ebp. */
|
||
I386_EDI_REGNUM, /* Slot for %esi. */
|
||
I386_EBP_REGNUM /* Slot for %edi. */
|
||
};
|
||
|
||
if (regnum >= 0 && regnum < sizeof (next_regnum) / sizeof (next_regnum[0]))
|
||
return next_regnum[regnum];
|
||
|
||
return -1;
|
||
}
|
||
|
||
/* Return nonzero if a value of type TYPE stored in register REGNUM
|
||
needs any special handling. */
|
||
|
||
static int
|
||
i386_convert_register_p (struct gdbarch *gdbarch,
|
||
int regnum, struct type *type)
|
||
{
|
||
int len = TYPE_LENGTH (type);
|
||
|
||
/* Values may be spread across multiple registers. Most debugging
|
||
formats aren't expressive enough to specify the locations, so
|
||
some heuristics is involved. Right now we only handle types that
|
||
have a length that is a multiple of the word size, since GCC
|
||
doesn't seem to put any other types into registers. */
|
||
if (len > 4 && len % 4 == 0)
|
||
{
|
||
int last_regnum = regnum;
|
||
|
||
while (len > 4)
|
||
{
|
||
last_regnum = i386_next_regnum (last_regnum);
|
||
len -= 4;
|
||
}
|
||
|
||
if (last_regnum != -1)
|
||
return 1;
|
||
}
|
||
|
||
return i387_convert_register_p (gdbarch, regnum, type);
|
||
}
|
||
|
||
/* Read a value of type TYPE from register REGNUM in frame FRAME, and
|
||
return its contents in TO. */
|
||
|
||
static int
|
||
i386_register_to_value (struct frame_info *frame, int regnum,
|
||
struct type *type, gdb_byte *to,
|
||
int *optimizedp, int *unavailablep)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (frame);
|
||
int len = TYPE_LENGTH (type);
|
||
|
||
if (i386_fp_regnum_p (gdbarch, regnum))
|
||
return i387_register_to_value (frame, regnum, type, to,
|
||
optimizedp, unavailablep);
|
||
|
||
/* Read a value spread across multiple registers. */
|
||
|
||
gdb_assert (len > 4 && len % 4 == 0);
|
||
|
||
while (len > 0)
|
||
{
|
||
gdb_assert (regnum != -1);
|
||
gdb_assert (register_size (gdbarch, regnum) == 4);
|
||
|
||
if (!get_frame_register_bytes (frame, regnum, 0,
|
||
register_size (gdbarch, regnum),
|
||
to, optimizedp, unavailablep))
|
||
return 0;
|
||
|
||
regnum = i386_next_regnum (regnum);
|
||
len -= 4;
|
||
to += 4;
|
||
}
|
||
|
||
*optimizedp = *unavailablep = 0;
|
||
return 1;
|
||
}
|
||
|
||
/* Write the contents FROM of a value of type TYPE into register
|
||
REGNUM in frame FRAME. */
|
||
|
||
static void
|
||
i386_value_to_register (struct frame_info *frame, int regnum,
|
||
struct type *type, const gdb_byte *from)
|
||
{
|
||
int len = TYPE_LENGTH (type);
|
||
|
||
if (i386_fp_regnum_p (get_frame_arch (frame), regnum))
|
||
{
|
||
i387_value_to_register (frame, regnum, type, from);
|
||
return;
|
||
}
|
||
|
||
/* Write a value spread across multiple registers. */
|
||
|
||
gdb_assert (len > 4 && len % 4 == 0);
|
||
|
||
while (len > 0)
|
||
{
|
||
gdb_assert (regnum != -1);
|
||
gdb_assert (register_size (get_frame_arch (frame), regnum) == 4);
|
||
|
||
put_frame_register (frame, regnum, from);
|
||
regnum = i386_next_regnum (regnum);
|
||
len -= 4;
|
||
from += 4;
|
||
}
|
||
}
|
||
|
||
/* Supply register REGNUM from the buffer specified by GREGS and LEN
|
||
in the general-purpose register set REGSET to register cache
|
||
REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
|
||
|
||
void
|
||
i386_supply_gregset (const struct regset *regset, struct regcache *regcache,
|
||
int regnum, const void *gregs, size_t len)
|
||
{
|
||
const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch);
|
||
const gdb_byte *regs = gregs;
|
||
int i;
|
||
|
||
gdb_assert (len == tdep->sizeof_gregset);
|
||
|
||
for (i = 0; i < tdep->gregset_num_regs; i++)
|
||
{
|
||
if ((regnum == i || regnum == -1)
|
||
&& tdep->gregset_reg_offset[i] != -1)
|
||
regcache_raw_supply (regcache, i, regs + tdep->gregset_reg_offset[i]);
|
||
}
|
||
}
|
||
|
||
/* Collect register REGNUM from the register cache REGCACHE and store
|
||
it in the buffer specified by GREGS and LEN as described by the
|
||
general-purpose register set REGSET. If REGNUM is -1, do this for
|
||
all registers in REGSET. */
|
||
|
||
void
|
||
i386_collect_gregset (const struct regset *regset,
|
||
const struct regcache *regcache,
|
||
int regnum, void *gregs, size_t len)
|
||
{
|
||
const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch);
|
||
gdb_byte *regs = gregs;
|
||
int i;
|
||
|
||
gdb_assert (len == tdep->sizeof_gregset);
|
||
|
||
for (i = 0; i < tdep->gregset_num_regs; i++)
|
||
{
|
||
if ((regnum == i || regnum == -1)
|
||
&& tdep->gregset_reg_offset[i] != -1)
|
||
regcache_raw_collect (regcache, i, regs + tdep->gregset_reg_offset[i]);
|
||
}
|
||
}
|
||
|
||
/* Supply register REGNUM from the buffer specified by FPREGS and LEN
|
||
in the floating-point register set REGSET to register cache
|
||
REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
|
||
|
||
static void
|
||
i386_supply_fpregset (const struct regset *regset, struct regcache *regcache,
|
||
int regnum, const void *fpregs, size_t len)
|
||
{
|
||
const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch);
|
||
|
||
if (len == I387_SIZEOF_FXSAVE)
|
||
{
|
||
i387_supply_fxsave (regcache, regnum, fpregs);
|
||
return;
|
||
}
|
||
|
||
gdb_assert (len == tdep->sizeof_fpregset);
|
||
i387_supply_fsave (regcache, regnum, fpregs);
|
||
}
|
||
|
||
/* Collect register REGNUM from the register cache REGCACHE and store
|
||
it in the buffer specified by FPREGS and LEN as described by the
|
||
floating-point register set REGSET. If REGNUM is -1, do this for
|
||
all registers in REGSET. */
|
||
|
||
static void
|
||
i386_collect_fpregset (const struct regset *regset,
|
||
const struct regcache *regcache,
|
||
int regnum, void *fpregs, size_t len)
|
||
{
|
||
const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch);
|
||
|
||
if (len == I387_SIZEOF_FXSAVE)
|
||
{
|
||
i387_collect_fxsave (regcache, regnum, fpregs);
|
||
return;
|
||
}
|
||
|
||
gdb_assert (len == tdep->sizeof_fpregset);
|
||
i387_collect_fsave (regcache, regnum, fpregs);
|
||
}
|
||
|
||
/* Similar to i386_supply_fpregset, but use XSAVE extended state. */
|
||
|
||
static void
|
||
i386_supply_xstateregset (const struct regset *regset,
|
||
struct regcache *regcache, int regnum,
|
||
const void *xstateregs, size_t len)
|
||
{
|
||
i387_supply_xsave (regcache, regnum, xstateregs);
|
||
}
|
||
|
||
/* Similar to i386_collect_fpregset , but use XSAVE extended state. */
|
||
|
||
static void
|
||
i386_collect_xstateregset (const struct regset *regset,
|
||
const struct regcache *regcache,
|
||
int regnum, void *xstateregs, size_t len)
|
||
{
|
||
i387_collect_xsave (regcache, regnum, xstateregs, 1);
|
||
}
|
||
|
||
/* Return the appropriate register set for the core section identified
|
||
by SECT_NAME and SECT_SIZE. */
|
||
|
||
const struct regset *
|
||
i386_regset_from_core_section (struct gdbarch *gdbarch,
|
||
const char *sect_name, size_t sect_size)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
if (strcmp (sect_name, ".reg") == 0 && sect_size == tdep->sizeof_gregset)
|
||
{
|
||
if (tdep->gregset == NULL)
|
||
tdep->gregset = regset_alloc (gdbarch, i386_supply_gregset,
|
||
i386_collect_gregset);
|
||
return tdep->gregset;
|
||
}
|
||
|
||
if ((strcmp (sect_name, ".reg2") == 0 && sect_size == tdep->sizeof_fpregset)
|
||
|| (strcmp (sect_name, ".reg-xfp") == 0
|
||
&& sect_size == I387_SIZEOF_FXSAVE))
|
||
{
|
||
if (tdep->fpregset == NULL)
|
||
tdep->fpregset = regset_alloc (gdbarch, i386_supply_fpregset,
|
||
i386_collect_fpregset);
|
||
return tdep->fpregset;
|
||
}
|
||
|
||
if (strcmp (sect_name, ".reg-xstate") == 0)
|
||
{
|
||
if (tdep->xstateregset == NULL)
|
||
tdep->xstateregset = regset_alloc (gdbarch,
|
||
i386_supply_xstateregset,
|
||
i386_collect_xstateregset);
|
||
|
||
return tdep->xstateregset;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Stuff for WIN32 PE style DLL's but is pretty generic really. */
|
||
|
||
CORE_ADDR
|
||
i386_pe_skip_trampoline_code (struct frame_info *frame,
|
||
CORE_ADDR pc, char *name)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (frame);
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
|
||
/* jmp *(dest) */
|
||
if (pc && read_memory_unsigned_integer (pc, 2, byte_order) == 0x25ff)
|
||
{
|
||
unsigned long indirect =
|
||
read_memory_unsigned_integer (pc + 2, 4, byte_order);
|
||
struct minimal_symbol *indsym =
|
||
indirect ? lookup_minimal_symbol_by_pc (indirect).minsym : 0;
|
||
const char *symname = indsym ? SYMBOL_LINKAGE_NAME (indsym) : 0;
|
||
|
||
if (symname)
|
||
{
|
||
if (strncmp (symname, "__imp_", 6) == 0
|
||
|| strncmp (symname, "_imp_", 5) == 0)
|
||
return name ? 1 :
|
||
read_memory_unsigned_integer (indirect, 4, byte_order);
|
||
}
|
||
}
|
||
return 0; /* Not a trampoline. */
|
||
}
|
||
|
||
|
||
/* Return whether the THIS_FRAME corresponds to a sigtramp
|
||
routine. */
|
||
|
||
int
|
||
i386_sigtramp_p (struct frame_info *this_frame)
|
||
{
|
||
CORE_ADDR pc = get_frame_pc (this_frame);
|
||
const char *name;
|
||
|
||
find_pc_partial_function (pc, &name, NULL, NULL);
|
||
return (name && strcmp ("_sigtramp", name) == 0);
|
||
}
|
||
|
||
|
||
/* We have two flavours of disassembly. The machinery on this page
|
||
deals with switching between those. */
|
||
|
||
static int
|
||
i386_print_insn (bfd_vma pc, struct disassemble_info *info)
|
||
{
|
||
gdb_assert (disassembly_flavor == att_flavor
|
||
|| disassembly_flavor == intel_flavor);
|
||
|
||
/* FIXME: kettenis/20020915: Until disassembler_options is properly
|
||
constified, cast to prevent a compiler warning. */
|
||
info->disassembler_options = (char *) disassembly_flavor;
|
||
|
||
return print_insn_i386 (pc, info);
|
||
}
|
||
|
||
|
||
/* There are a few i386 architecture variants that differ only
|
||
slightly from the generic i386 target. For now, we don't give them
|
||
their own source file, but include them here. As a consequence,
|
||
they'll always be included. */
|
||
|
||
/* System V Release 4 (SVR4). */
|
||
|
||
/* Return whether THIS_FRAME corresponds to a SVR4 sigtramp
|
||
routine. */
|
||
|
||
static int
|
||
i386_svr4_sigtramp_p (struct frame_info *this_frame)
|
||
{
|
||
CORE_ADDR pc = get_frame_pc (this_frame);
|
||
const char *name;
|
||
|
||
/* The origin of these symbols is currently unknown. */
|
||
find_pc_partial_function (pc, &name, NULL, NULL);
|
||
return (name && (strcmp ("_sigreturn", name) == 0
|
||
|| strcmp ("sigvechandler", name) == 0));
|
||
}
|
||
|
||
/* Assuming THIS_FRAME is for a SVR4 sigtramp routine, return the
|
||
address of the associated sigcontext (ucontext) structure. */
|
||
|
||
static CORE_ADDR
|
||
i386_svr4_sigcontext_addr (struct frame_info *this_frame)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
gdb_byte buf[4];
|
||
CORE_ADDR sp;
|
||
|
||
get_frame_register (this_frame, I386_ESP_REGNUM, buf);
|
||
sp = extract_unsigned_integer (buf, 4, byte_order);
|
||
|
||
return read_memory_unsigned_integer (sp + 8, 4, byte_order);
|
||
}
|
||
|
||
|
||
|
||
/* Implementation of `gdbarch_stap_is_single_operand', as defined in
|
||
gdbarch.h. */
|
||
|
||
int
|
||
i386_stap_is_single_operand (struct gdbarch *gdbarch, const char *s)
|
||
{
|
||
return (*s == '$' /* Literal number. */
|
||
|| (isdigit (*s) && s[1] == '(' && s[2] == '%') /* Displacement. */
|
||
|| (*s == '(' && s[1] == '%') /* Register indirection. */
|
||
|| (*s == '%' && isalpha (s[1]))); /* Register access. */
|
||
}
|
||
|
||
/* Helper function for i386_stap_parse_special_token.
|
||
|
||
This function parses operands of the form `-8+3+1(%rbp)', which
|
||
must be interpreted as `*(-8 + 3 - 1 + (void *) $eax)'.
|
||
|
||
Return 1 if the operand was parsed successfully, zero
|
||
otherwise. */
|
||
|
||
static int
|
||
i386_stap_parse_special_token_triplet (struct gdbarch *gdbarch,
|
||
struct stap_parse_info *p)
|
||
{
|
||
const char *s = p->arg;
|
||
|
||
if (isdigit (*s) || *s == '-' || *s == '+')
|
||
{
|
||
int got_minus[3];
|
||
int i;
|
||
long displacements[3];
|
||
const char *start;
|
||
char *regname;
|
||
int len;
|
||
struct stoken str;
|
||
char *endp;
|
||
|
||
got_minus[0] = 0;
|
||
if (*s == '+')
|
||
++s;
|
||
else if (*s == '-')
|
||
{
|
||
++s;
|
||
got_minus[0] = 1;
|
||
}
|
||
|
||
displacements[0] = strtol (s, &endp, 10);
|
||
s = endp;
|
||
|
||
if (*s != '+' && *s != '-')
|
||
{
|
||
/* We are not dealing with a triplet. */
|
||
return 0;
|
||
}
|
||
|
||
got_minus[1] = 0;
|
||
if (*s == '+')
|
||
++s;
|
||
else
|
||
{
|
||
++s;
|
||
got_minus[1] = 1;
|
||
}
|
||
|
||
displacements[1] = strtol (s, &endp, 10);
|
||
s = endp;
|
||
|
||
if (*s != '+' && *s != '-')
|
||
{
|
||
/* We are not dealing with a triplet. */
|
||
return 0;
|
||
}
|
||
|
||
got_minus[2] = 0;
|
||
if (*s == '+')
|
||
++s;
|
||
else
|
||
{
|
||
++s;
|
||
got_minus[2] = 1;
|
||
}
|
||
|
||
displacements[2] = strtol (s, &endp, 10);
|
||
s = endp;
|
||
|
||
if (*s != '(' || s[1] != '%')
|
||
return 0;
|
||
|
||
s += 2;
|
||
start = s;
|
||
|
||
while (isalnum (*s))
|
||
++s;
|
||
|
||
if (*s++ != ')')
|
||
return 0;
|
||
|
||
len = s - start;
|
||
regname = alloca (len + 1);
|
||
|
||
strncpy (regname, start, len);
|
||
regname[len] = '\0';
|
||
|
||
if (user_reg_map_name_to_regnum (gdbarch, regname, len) == -1)
|
||
error (_("Invalid register name `%s' on expression `%s'."),
|
||
regname, p->saved_arg);
|
||
|
||
for (i = 0; i < 3; i++)
|
||
{
|
||
write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_type (builtin_type (gdbarch)->builtin_long);
|
||
write_exp_elt_longcst (displacements[i]);
|
||
write_exp_elt_opcode (OP_LONG);
|
||
if (got_minus[i])
|
||
write_exp_elt_opcode (UNOP_NEG);
|
||
}
|
||
|
||
write_exp_elt_opcode (OP_REGISTER);
|
||
str.ptr = regname;
|
||
str.length = len;
|
||
write_exp_string (str);
|
||
write_exp_elt_opcode (OP_REGISTER);
|
||
|
||
write_exp_elt_opcode (UNOP_CAST);
|
||
write_exp_elt_type (builtin_type (gdbarch)->builtin_data_ptr);
|
||
write_exp_elt_opcode (UNOP_CAST);
|
||
|
||
write_exp_elt_opcode (BINOP_ADD);
|
||
write_exp_elt_opcode (BINOP_ADD);
|
||
write_exp_elt_opcode (BINOP_ADD);
|
||
|
||
write_exp_elt_opcode (UNOP_CAST);
|
||
write_exp_elt_type (lookup_pointer_type (p->arg_type));
|
||
write_exp_elt_opcode (UNOP_CAST);
|
||
|
||
write_exp_elt_opcode (UNOP_IND);
|
||
|
||
p->arg = s;
|
||
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Helper function for i386_stap_parse_special_token.
|
||
|
||
This function parses operands of the form `register base +
|
||
(register index * size) + offset', as represented in
|
||
`(%rcx,%rax,8)', or `[OFFSET](BASE_REG,INDEX_REG[,SIZE])'.
|
||
|
||
Return 1 if the operand was parsed successfully, zero
|
||
otherwise. */
|
||
|
||
static int
|
||
i386_stap_parse_special_token_three_arg_disp (struct gdbarch *gdbarch,
|
||
struct stap_parse_info *p)
|
||
{
|
||
const char *s = p->arg;
|
||
|
||
if (isdigit (*s) || *s == '(' || *s == '-' || *s == '+')
|
||
{
|
||
int offset_minus = 0;
|
||
long offset = 0;
|
||
int size_minus = 0;
|
||
long size = 0;
|
||
const char *start;
|
||
char *base;
|
||
int len_base;
|
||
char *index;
|
||
int len_index;
|
||
struct stoken base_token, index_token;
|
||
|
||
if (*s == '+')
|
||
++s;
|
||
else if (*s == '-')
|
||
{
|
||
++s;
|
||
offset_minus = 1;
|
||
}
|
||
|
||
if (offset_minus && !isdigit (*s))
|
||
return 0;
|
||
|
||
if (isdigit (*s))
|
||
{
|
||
char *endp;
|
||
|
||
offset = strtol (s, &endp, 10);
|
||
s = endp;
|
||
}
|
||
|
||
if (*s != '(' || s[1] != '%')
|
||
return 0;
|
||
|
||
s += 2;
|
||
start = s;
|
||
|
||
while (isalnum (*s))
|
||
++s;
|
||
|
||
if (*s != ',' || s[1] != '%')
|
||
return 0;
|
||
|
||
len_base = s - start;
|
||
base = alloca (len_base + 1);
|
||
strncpy (base, start, len_base);
|
||
base[len_base] = '\0';
|
||
|
||
if (user_reg_map_name_to_regnum (gdbarch, base, len_base) == -1)
|
||
error (_("Invalid register name `%s' on expression `%s'."),
|
||
base, p->saved_arg);
|
||
|
||
s += 2;
|
||
start = s;
|
||
|
||
while (isalnum (*s))
|
||
++s;
|
||
|
||
len_index = s - start;
|
||
index = alloca (len_index + 1);
|
||
strncpy (index, start, len_index);
|
||
index[len_index] = '\0';
|
||
|
||
if (user_reg_map_name_to_regnum (gdbarch, index, len_index) == -1)
|
||
error (_("Invalid register name `%s' on expression `%s'."),
|
||
index, p->saved_arg);
|
||
|
||
if (*s != ',' && *s != ')')
|
||
return 0;
|
||
|
||
if (*s == ',')
|
||
{
|
||
char *endp;
|
||
|
||
++s;
|
||
if (*s == '+')
|
||
++s;
|
||
else if (*s == '-')
|
||
{
|
||
++s;
|
||
size_minus = 1;
|
||
}
|
||
|
||
size = strtol (s, &endp, 10);
|
||
s = endp;
|
||
|
||
if (*s != ')')
|
||
return 0;
|
||
}
|
||
|
||
++s;
|
||
|
||
if (offset)
|
||
{
|
||
write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_type (builtin_type (gdbarch)->builtin_long);
|
||
write_exp_elt_longcst (offset);
|
||
write_exp_elt_opcode (OP_LONG);
|
||
if (offset_minus)
|
||
write_exp_elt_opcode (UNOP_NEG);
|
||
}
|
||
|
||
write_exp_elt_opcode (OP_REGISTER);
|
||
base_token.ptr = base;
|
||
base_token.length = len_base;
|
||
write_exp_string (base_token);
|
||
write_exp_elt_opcode (OP_REGISTER);
|
||
|
||
if (offset)
|
||
write_exp_elt_opcode (BINOP_ADD);
|
||
|
||
write_exp_elt_opcode (OP_REGISTER);
|
||
index_token.ptr = index;
|
||
index_token.length = len_index;
|
||
write_exp_string (index_token);
|
||
write_exp_elt_opcode (OP_REGISTER);
|
||
|
||
if (size)
|
||
{
|
||
write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_type (builtin_type (gdbarch)->builtin_long);
|
||
write_exp_elt_longcst (size);
|
||
write_exp_elt_opcode (OP_LONG);
|
||
if (size_minus)
|
||
write_exp_elt_opcode (UNOP_NEG);
|
||
write_exp_elt_opcode (BINOP_MUL);
|
||
}
|
||
|
||
write_exp_elt_opcode (BINOP_ADD);
|
||
|
||
write_exp_elt_opcode (UNOP_CAST);
|
||
write_exp_elt_type (lookup_pointer_type (p->arg_type));
|
||
write_exp_elt_opcode (UNOP_CAST);
|
||
|
||
write_exp_elt_opcode (UNOP_IND);
|
||
|
||
p->arg = s;
|
||
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Implementation of `gdbarch_stap_parse_special_token', as defined in
|
||
gdbarch.h. */
|
||
|
||
int
|
||
i386_stap_parse_special_token (struct gdbarch *gdbarch,
|
||
struct stap_parse_info *p)
|
||
{
|
||
/* In order to parse special tokens, we use a state-machine that go
|
||
through every known token and try to get a match. */
|
||
enum
|
||
{
|
||
TRIPLET,
|
||
THREE_ARG_DISPLACEMENT,
|
||
DONE
|
||
} current_state;
|
||
|
||
current_state = TRIPLET;
|
||
|
||
/* The special tokens to be parsed here are:
|
||
|
||
- `register base + (register index * size) + offset', as represented
|
||
in `(%rcx,%rax,8)', or `[OFFSET](BASE_REG,INDEX_REG[,SIZE])'.
|
||
|
||
- Operands of the form `-8+3+1(%rbp)', which must be interpreted as
|
||
`*(-8 + 3 - 1 + (void *) $eax)'. */
|
||
|
||
while (current_state != DONE)
|
||
{
|
||
switch (current_state)
|
||
{
|
||
case TRIPLET:
|
||
if (i386_stap_parse_special_token_triplet (gdbarch, p))
|
||
return 1;
|
||
break;
|
||
|
||
case THREE_ARG_DISPLACEMENT:
|
||
if (i386_stap_parse_special_token_three_arg_disp (gdbarch, p))
|
||
return 1;
|
||
break;
|
||
}
|
||
|
||
/* Advancing to the next state. */
|
||
++current_state;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
/* Generic ELF. */
|
||
|
||
void
|
||
i386_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
static const char *const stap_integer_prefixes[] = { "$", NULL };
|
||
static const char *const stap_register_prefixes[] = { "%", NULL };
|
||
static const char *const stap_register_indirection_prefixes[] = { "(",
|
||
NULL };
|
||
static const char *const stap_register_indirection_suffixes[] = { ")",
|
||
NULL };
|
||
|
||
/* We typically use stabs-in-ELF with the SVR4 register numbering. */
|
||
set_gdbarch_stab_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum);
|
||
|
||
/* Registering SystemTap handlers. */
|
||
set_gdbarch_stap_integer_prefixes (gdbarch, stap_integer_prefixes);
|
||
set_gdbarch_stap_register_prefixes (gdbarch, stap_register_prefixes);
|
||
set_gdbarch_stap_register_indirection_prefixes (gdbarch,
|
||
stap_register_indirection_prefixes);
|
||
set_gdbarch_stap_register_indirection_suffixes (gdbarch,
|
||
stap_register_indirection_suffixes);
|
||
set_gdbarch_stap_is_single_operand (gdbarch,
|
||
i386_stap_is_single_operand);
|
||
set_gdbarch_stap_parse_special_token (gdbarch,
|
||
i386_stap_parse_special_token);
|
||
}
|
||
|
||
/* System V Release 4 (SVR4). */
|
||
|
||
void
|
||
i386_svr4_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
/* System V Release 4 uses ELF. */
|
||
i386_elf_init_abi (info, gdbarch);
|
||
|
||
/* System V Release 4 has shared libraries. */
|
||
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
|
||
|
||
tdep->sigtramp_p = i386_svr4_sigtramp_p;
|
||
tdep->sigcontext_addr = i386_svr4_sigcontext_addr;
|
||
tdep->sc_pc_offset = 36 + 14 * 4;
|
||
tdep->sc_sp_offset = 36 + 17 * 4;
|
||
|
||
tdep->jb_pc_offset = 20;
|
||
}
|
||
|
||
/* DJGPP. */
|
||
|
||
static void
|
||
i386_go32_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
/* DJGPP doesn't have any special frames for signal handlers. */
|
||
tdep->sigtramp_p = NULL;
|
||
|
||
tdep->jb_pc_offset = 36;
|
||
|
||
/* DJGPP does not support the SSE registers. */
|
||
if (! tdesc_has_registers (info.target_desc))
|
||
tdep->tdesc = tdesc_i386_mmx;
|
||
|
||
/* Native compiler is GCC, which uses the SVR4 register numbering
|
||
even in COFF and STABS. See the comment in i386_gdbarch_init,
|
||
before the calls to set_gdbarch_stab_reg_to_regnum and
|
||
set_gdbarch_sdb_reg_to_regnum. */
|
||
set_gdbarch_stab_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum);
|
||
set_gdbarch_sdb_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum);
|
||
|
||
set_gdbarch_has_dos_based_file_system (gdbarch, 1);
|
||
}
|
||
|
||
|
||
/* i386 register groups. In addition to the normal groups, add "mmx"
|
||
and "sse". */
|
||
|
||
static struct reggroup *i386_sse_reggroup;
|
||
static struct reggroup *i386_mmx_reggroup;
|
||
|
||
static void
|
||
i386_init_reggroups (void)
|
||
{
|
||
i386_sse_reggroup = reggroup_new ("sse", USER_REGGROUP);
|
||
i386_mmx_reggroup = reggroup_new ("mmx", USER_REGGROUP);
|
||
}
|
||
|
||
static void
|
||
i386_add_reggroups (struct gdbarch *gdbarch)
|
||
{
|
||
reggroup_add (gdbarch, i386_sse_reggroup);
|
||
reggroup_add (gdbarch, i386_mmx_reggroup);
|
||
reggroup_add (gdbarch, general_reggroup);
|
||
reggroup_add (gdbarch, float_reggroup);
|
||
reggroup_add (gdbarch, all_reggroup);
|
||
reggroup_add (gdbarch, save_reggroup);
|
||
reggroup_add (gdbarch, restore_reggroup);
|
||
reggroup_add (gdbarch, vector_reggroup);
|
||
reggroup_add (gdbarch, system_reggroup);
|
||
}
|
||
|
||
int
|
||
i386_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
|
||
struct reggroup *group)
|
||
{
|
||
const struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
int fp_regnum_p, mmx_regnum_p, xmm_regnum_p, mxcsr_regnum_p,
|
||
ymm_regnum_p, ymmh_regnum_p, bndr_regnum_p, bnd_regnum_p,
|
||
mpx_ctrl_regnum_p;
|
||
|
||
/* Don't include pseudo registers, except for MMX, in any register
|
||
groups. */
|
||
if (i386_byte_regnum_p (gdbarch, regnum))
|
||
return 0;
|
||
|
||
if (i386_word_regnum_p (gdbarch, regnum))
|
||
return 0;
|
||
|
||
if (i386_dword_regnum_p (gdbarch, regnum))
|
||
return 0;
|
||
|
||
mmx_regnum_p = i386_mmx_regnum_p (gdbarch, regnum);
|
||
if (group == i386_mmx_reggroup)
|
||
return mmx_regnum_p;
|
||
|
||
xmm_regnum_p = i386_xmm_regnum_p (gdbarch, regnum);
|
||
mxcsr_regnum_p = i386_mxcsr_regnum_p (gdbarch, regnum);
|
||
if (group == i386_sse_reggroup)
|
||
return xmm_regnum_p || mxcsr_regnum_p;
|
||
|
||
ymm_regnum_p = i386_ymm_regnum_p (gdbarch, regnum);
|
||
if (group == vector_reggroup)
|
||
return (mmx_regnum_p
|
||
|| ymm_regnum_p
|
||
|| mxcsr_regnum_p
|
||
|| (xmm_regnum_p
|
||
&& ((tdep->xcr0 & I386_XSTATE_AVX_MASK)
|
||
== I386_XSTATE_SSE_MASK)));
|
||
|
||
fp_regnum_p = (i386_fp_regnum_p (gdbarch, regnum)
|
||
|| i386_fpc_regnum_p (gdbarch, regnum));
|
||
if (group == float_reggroup)
|
||
return fp_regnum_p;
|
||
|
||
/* For "info reg all", don't include upper YMM registers nor XMM
|
||
registers when AVX is supported. */
|
||
ymmh_regnum_p = i386_ymmh_regnum_p (gdbarch, regnum);
|
||
if (group == all_reggroup
|
||
&& ((xmm_regnum_p
|
||
&& (tdep->xcr0 & I386_XSTATE_AVX))
|
||
|| ymmh_regnum_p))
|
||
return 0;
|
||
|
||
bnd_regnum_p = i386_bnd_regnum_p (gdbarch, regnum);
|
||
if (group == all_reggroup
|
||
&& ((bnd_regnum_p && (tdep->xcr0 & I386_XSTATE_MPX_MASK))))
|
||
return bnd_regnum_p;
|
||
|
||
bndr_regnum_p = i386_bndr_regnum_p (gdbarch, regnum);
|
||
if (group == all_reggroup
|
||
&& ((bndr_regnum_p && (tdep->xcr0 & I386_XSTATE_MPX_MASK))))
|
||
return 0;
|
||
|
||
mpx_ctrl_regnum_p = i386_mpx_ctrl_regnum_p (gdbarch, regnum);
|
||
if (group == all_reggroup
|
||
&& ((mpx_ctrl_regnum_p && (tdep->xcr0 & I386_XSTATE_MPX_MASK))))
|
||
return mpx_ctrl_regnum_p;
|
||
|
||
if (group == general_reggroup)
|
||
return (!fp_regnum_p
|
||
&& !mmx_regnum_p
|
||
&& !mxcsr_regnum_p
|
||
&& !xmm_regnum_p
|
||
&& !ymm_regnum_p
|
||
&& !ymmh_regnum_p
|
||
&& !bndr_regnum_p
|
||
&& !bnd_regnum_p
|
||
&& !mpx_ctrl_regnum_p);
|
||
|
||
return default_register_reggroup_p (gdbarch, regnum, group);
|
||
}
|
||
|
||
|
||
/* Get the ARGIth function argument for the current function. */
|
||
|
||
static CORE_ADDR
|
||
i386_fetch_pointer_argument (struct frame_info *frame, int argi,
|
||
struct type *type)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (frame);
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
CORE_ADDR sp = get_frame_register_unsigned (frame, I386_ESP_REGNUM);
|
||
return read_memory_unsigned_integer (sp + (4 * (argi + 1)), 4, byte_order);
|
||
}
|
||
|
||
static void
|
||
i386_skip_permanent_breakpoint (struct regcache *regcache)
|
||
{
|
||
CORE_ADDR current_pc = regcache_read_pc (regcache);
|
||
|
||
/* On i386, breakpoint is exactly 1 byte long, so we just
|
||
adjust the PC in the regcache. */
|
||
current_pc += 1;
|
||
regcache_write_pc (regcache, current_pc);
|
||
}
|
||
|
||
|
||
#define PREFIX_REPZ 0x01
|
||
#define PREFIX_REPNZ 0x02
|
||
#define PREFIX_LOCK 0x04
|
||
#define PREFIX_DATA 0x08
|
||
#define PREFIX_ADDR 0x10
|
||
|
||
/* operand size */
|
||
enum
|
||
{
|
||
OT_BYTE = 0,
|
||
OT_WORD,
|
||
OT_LONG,
|
||
OT_QUAD,
|
||
OT_DQUAD,
|
||
};
|
||
|
||
/* i386 arith/logic operations */
|
||
enum
|
||
{
|
||
OP_ADDL,
|
||
OP_ORL,
|
||
OP_ADCL,
|
||
OP_SBBL,
|
||
OP_ANDL,
|
||
OP_SUBL,
|
||
OP_XORL,
|
||
OP_CMPL,
|
||
};
|
||
|
||
struct i386_record_s
|
||
{
|
||
struct gdbarch *gdbarch;
|
||
struct regcache *regcache;
|
||
CORE_ADDR orig_addr;
|
||
CORE_ADDR addr;
|
||
int aflag;
|
||
int dflag;
|
||
int override;
|
||
uint8_t modrm;
|
||
uint8_t mod, reg, rm;
|
||
int ot;
|
||
uint8_t rex_x;
|
||
uint8_t rex_b;
|
||
int rip_offset;
|
||
int popl_esp_hack;
|
||
const int *regmap;
|
||
};
|
||
|
||
/* Parse the "modrm" part of the memory address irp->addr points at.
|
||
Returns -1 if something goes wrong, 0 otherwise. */
|
||
|
||
static int
|
||
i386_record_modrm (struct i386_record_s *irp)
|
||
{
|
||
struct gdbarch *gdbarch = irp->gdbarch;
|
||
|
||
if (record_read_memory (gdbarch, irp->addr, &irp->modrm, 1))
|
||
return -1;
|
||
|
||
irp->addr++;
|
||
irp->mod = (irp->modrm >> 6) & 3;
|
||
irp->reg = (irp->modrm >> 3) & 7;
|
||
irp->rm = irp->modrm & 7;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Extract the memory address that the current instruction writes to,
|
||
and return it in *ADDR. Return -1 if something goes wrong. */
|
||
|
||
static int
|
||
i386_record_lea_modrm_addr (struct i386_record_s *irp, uint64_t *addr)
|
||
{
|
||
struct gdbarch *gdbarch = irp->gdbarch;
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
gdb_byte buf[4];
|
||
ULONGEST offset64;
|
||
|
||
*addr = 0;
|
||
if (irp->aflag || irp->regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
/* 32/64 bits */
|
||
int havesib = 0;
|
||
uint8_t scale = 0;
|
||
uint8_t byte;
|
||
uint8_t index = 0;
|
||
uint8_t base = irp->rm;
|
||
|
||
if (base == 4)
|
||
{
|
||
havesib = 1;
|
||
if (record_read_memory (gdbarch, irp->addr, &byte, 1))
|
||
return -1;
|
||
irp->addr++;
|
||
scale = (byte >> 6) & 3;
|
||
index = ((byte >> 3) & 7) | irp->rex_x;
|
||
base = (byte & 7);
|
||
}
|
||
base |= irp->rex_b;
|
||
|
||
switch (irp->mod)
|
||
{
|
||
case 0:
|
||
if ((base & 7) == 5)
|
||
{
|
||
base = 0xff;
|
||
if (record_read_memory (gdbarch, irp->addr, buf, 4))
|
||
return -1;
|
||
irp->addr += 4;
|
||
*addr = extract_signed_integer (buf, 4, byte_order);
|
||
if (irp->regmap[X86_RECORD_R8_REGNUM] && !havesib)
|
||
*addr += irp->addr + irp->rip_offset;
|
||
}
|
||
break;
|
||
case 1:
|
||
if (record_read_memory (gdbarch, irp->addr, buf, 1))
|
||
return -1;
|
||
irp->addr++;
|
||
*addr = (int8_t) buf[0];
|
||
break;
|
||
case 2:
|
||
if (record_read_memory (gdbarch, irp->addr, buf, 4))
|
||
return -1;
|
||
*addr = extract_signed_integer (buf, 4, byte_order);
|
||
irp->addr += 4;
|
||
break;
|
||
}
|
||
|
||
offset64 = 0;
|
||
if (base != 0xff)
|
||
{
|
||
if (base == 4 && irp->popl_esp_hack)
|
||
*addr += irp->popl_esp_hack;
|
||
regcache_raw_read_unsigned (irp->regcache, irp->regmap[base],
|
||
&offset64);
|
||
}
|
||
if (irp->aflag == 2)
|
||
{
|
||
*addr += offset64;
|
||
}
|
||
else
|
||
*addr = (uint32_t) (offset64 + *addr);
|
||
|
||
if (havesib && (index != 4 || scale != 0))
|
||
{
|
||
regcache_raw_read_unsigned (irp->regcache, irp->regmap[index],
|
||
&offset64);
|
||
if (irp->aflag == 2)
|
||
*addr += offset64 << scale;
|
||
else
|
||
*addr = (uint32_t) (*addr + (offset64 << scale));
|
||
}
|
||
|
||
if (!irp->aflag)
|
||
{
|
||
/* Since we are in 64-bit mode with ADDR32 prefix, zero-extend
|
||
address from 32-bit to 64-bit. */
|
||
*addr = (uint32_t) *addr;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* 16 bits */
|
||
switch (irp->mod)
|
||
{
|
||
case 0:
|
||
if (irp->rm == 6)
|
||
{
|
||
if (record_read_memory (gdbarch, irp->addr, buf, 2))
|
||
return -1;
|
||
irp->addr += 2;
|
||
*addr = extract_signed_integer (buf, 2, byte_order);
|
||
irp->rm = 0;
|
||
goto no_rm;
|
||
}
|
||
break;
|
||
case 1:
|
||
if (record_read_memory (gdbarch, irp->addr, buf, 1))
|
||
return -1;
|
||
irp->addr++;
|
||
*addr = (int8_t) buf[0];
|
||
break;
|
||
case 2:
|
||
if (record_read_memory (gdbarch, irp->addr, buf, 2))
|
||
return -1;
|
||
irp->addr += 2;
|
||
*addr = extract_signed_integer (buf, 2, byte_order);
|
||
break;
|
||
}
|
||
|
||
switch (irp->rm)
|
||
{
|
||
case 0:
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_REBX_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_RESI_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
break;
|
||
case 1:
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_REBX_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_REDI_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
break;
|
||
case 2:
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_REBP_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_RESI_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
break;
|
||
case 3:
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_REBP_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_REDI_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
break;
|
||
case 4:
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_RESI_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
break;
|
||
case 5:
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_REDI_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
break;
|
||
case 6:
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_REBP_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
break;
|
||
case 7:
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_REBX_REGNUM],
|
||
&offset64);
|
||
*addr = (uint32_t) (*addr + offset64);
|
||
break;
|
||
}
|
||
*addr &= 0xffff;
|
||
}
|
||
|
||
no_rm:
|
||
return 0;
|
||
}
|
||
|
||
/* Record the address and contents of the memory that will be changed
|
||
by the current instruction. Return -1 if something goes wrong, 0
|
||
otherwise. */
|
||
|
||
static int
|
||
i386_record_lea_modrm (struct i386_record_s *irp)
|
||
{
|
||
struct gdbarch *gdbarch = irp->gdbarch;
|
||
uint64_t addr;
|
||
|
||
if (irp->override >= 0)
|
||
{
|
||
if (record_full_memory_query)
|
||
{
|
||
int q;
|
||
|
||
target_terminal_ours ();
|
||
q = yquery (_("\
|
||
Process record ignores the memory change of instruction at address %s\n\
|
||
because it can't get the value of the segment register.\n\
|
||
Do you want to stop the program?"),
|
||
paddress (gdbarch, irp->orig_addr));
|
||
target_terminal_inferior ();
|
||
if (q)
|
||
return -1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
if (i386_record_lea_modrm_addr (irp, &addr))
|
||
return -1;
|
||
|
||
if (record_full_arch_list_add_mem (addr, 1 << irp->ot))
|
||
return -1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Record the effects of a push operation. Return -1 if something
|
||
goes wrong, 0 otherwise. */
|
||
|
||
static int
|
||
i386_record_push (struct i386_record_s *irp, int size)
|
||
{
|
||
ULONGEST addr;
|
||
|
||
if (record_full_arch_list_add_reg (irp->regcache,
|
||
irp->regmap[X86_RECORD_RESP_REGNUM]))
|
||
return -1;
|
||
regcache_raw_read_unsigned (irp->regcache,
|
||
irp->regmap[X86_RECORD_RESP_REGNUM],
|
||
&addr);
|
||
if (record_full_arch_list_add_mem ((CORE_ADDR) addr - size, size))
|
||
return -1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Defines contents to record. */
|
||
#define I386_SAVE_FPU_REGS 0xfffd
|
||
#define I386_SAVE_FPU_ENV 0xfffe
|
||
#define I386_SAVE_FPU_ENV_REG_STACK 0xffff
|
||
|
||
/* Record the values of the floating point registers which will be
|
||
changed by the current instruction. Returns -1 if something is
|
||
wrong, 0 otherwise. */
|
||
|
||
static int i386_record_floats (struct gdbarch *gdbarch,
|
||
struct i386_record_s *ir,
|
||
uint32_t iregnum)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
int i;
|
||
|
||
/* Oza: Because of floating point insn push/pop of fpu stack is going to
|
||
happen. Currently we store st0-st7 registers, but we need not store all
|
||
registers all the time, in future we use ftag register and record only
|
||
those who are not marked as an empty. */
|
||
|
||
if (I386_SAVE_FPU_REGS == iregnum)
|
||
{
|
||
for (i = I387_ST0_REGNUM (tdep); i <= I387_ST0_REGNUM (tdep) + 7; i++)
|
||
{
|
||
if (record_full_arch_list_add_reg (ir->regcache, i))
|
||
return -1;
|
||
}
|
||
}
|
||
else if (I386_SAVE_FPU_ENV == iregnum)
|
||
{
|
||
for (i = I387_FCTRL_REGNUM (tdep); i <= I387_FOP_REGNUM (tdep); i++)
|
||
{
|
||
if (record_full_arch_list_add_reg (ir->regcache, i))
|
||
return -1;
|
||
}
|
||
}
|
||
else if (I386_SAVE_FPU_ENV_REG_STACK == iregnum)
|
||
{
|
||
for (i = I387_ST0_REGNUM (tdep); i <= I387_FOP_REGNUM (tdep); i++)
|
||
{
|
||
if (record_full_arch_list_add_reg (ir->regcache, i))
|
||
return -1;
|
||
}
|
||
}
|
||
else if ((iregnum >= I387_ST0_REGNUM (tdep)) &&
|
||
(iregnum <= I387_FOP_REGNUM (tdep)))
|
||
{
|
||
if (record_full_arch_list_add_reg (ir->regcache,iregnum))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
/* Parameter error. */
|
||
return -1;
|
||
}
|
||
if(I386_SAVE_FPU_ENV != iregnum)
|
||
{
|
||
for (i = I387_FCTRL_REGNUM (tdep); i <= I387_FOP_REGNUM (tdep); i++)
|
||
{
|
||
if (record_full_arch_list_add_reg (ir->regcache, i))
|
||
return -1;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Parse the current instruction, and record the values of the
|
||
registers and memory that will be changed by the current
|
||
instruction. Returns -1 if something goes wrong, 0 otherwise. */
|
||
|
||
#define I386_RECORD_FULL_ARCH_LIST_ADD_REG(regnum) \
|
||
record_full_arch_list_add_reg (ir.regcache, ir.regmap[(regnum)])
|
||
|
||
int
|
||
i386_process_record (struct gdbarch *gdbarch, struct regcache *regcache,
|
||
CORE_ADDR input_addr)
|
||
{
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
int prefixes = 0;
|
||
int regnum = 0;
|
||
uint32_t opcode;
|
||
uint8_t opcode8;
|
||
ULONGEST addr;
|
||
gdb_byte buf[MAX_REGISTER_SIZE];
|
||
struct i386_record_s ir;
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
uint8_t rex_w = -1;
|
||
uint8_t rex_r = 0;
|
||
|
||
memset (&ir, 0, sizeof (struct i386_record_s));
|
||
ir.regcache = regcache;
|
||
ir.addr = input_addr;
|
||
ir.orig_addr = input_addr;
|
||
ir.aflag = 1;
|
||
ir.dflag = 1;
|
||
ir.override = -1;
|
||
ir.popl_esp_hack = 0;
|
||
ir.regmap = tdep->record_regmap;
|
||
ir.gdbarch = gdbarch;
|
||
|
||
if (record_debug > 1)
|
||
fprintf_unfiltered (gdb_stdlog, "Process record: i386_process_record "
|
||
"addr = %s\n",
|
||
paddress (gdbarch, ir.addr));
|
||
|
||
/* prefixes */
|
||
while (1)
|
||
{
|
||
if (record_read_memory (gdbarch, ir.addr, &opcode8, 1))
|
||
return -1;
|
||
ir.addr++;
|
||
switch (opcode8) /* Instruction prefixes */
|
||
{
|
||
case REPE_PREFIX_OPCODE:
|
||
prefixes |= PREFIX_REPZ;
|
||
break;
|
||
case REPNE_PREFIX_OPCODE:
|
||
prefixes |= PREFIX_REPNZ;
|
||
break;
|
||
case LOCK_PREFIX_OPCODE:
|
||
prefixes |= PREFIX_LOCK;
|
||
break;
|
||
case CS_PREFIX_OPCODE:
|
||
ir.override = X86_RECORD_CS_REGNUM;
|
||
break;
|
||
case SS_PREFIX_OPCODE:
|
||
ir.override = X86_RECORD_SS_REGNUM;
|
||
break;
|
||
case DS_PREFIX_OPCODE:
|
||
ir.override = X86_RECORD_DS_REGNUM;
|
||
break;
|
||
case ES_PREFIX_OPCODE:
|
||
ir.override = X86_RECORD_ES_REGNUM;
|
||
break;
|
||
case FS_PREFIX_OPCODE:
|
||
ir.override = X86_RECORD_FS_REGNUM;
|
||
break;
|
||
case GS_PREFIX_OPCODE:
|
||
ir.override = X86_RECORD_GS_REGNUM;
|
||
break;
|
||
case DATA_PREFIX_OPCODE:
|
||
prefixes |= PREFIX_DATA;
|
||
break;
|
||
case ADDR_PREFIX_OPCODE:
|
||
prefixes |= PREFIX_ADDR;
|
||
break;
|
||
case 0x40: /* i386 inc %eax */
|
||
case 0x41: /* i386 inc %ecx */
|
||
case 0x42: /* i386 inc %edx */
|
||
case 0x43: /* i386 inc %ebx */
|
||
case 0x44: /* i386 inc %esp */
|
||
case 0x45: /* i386 inc %ebp */
|
||
case 0x46: /* i386 inc %esi */
|
||
case 0x47: /* i386 inc %edi */
|
||
case 0x48: /* i386 dec %eax */
|
||
case 0x49: /* i386 dec %ecx */
|
||
case 0x4a: /* i386 dec %edx */
|
||
case 0x4b: /* i386 dec %ebx */
|
||
case 0x4c: /* i386 dec %esp */
|
||
case 0x4d: /* i386 dec %ebp */
|
||
case 0x4e: /* i386 dec %esi */
|
||
case 0x4f: /* i386 dec %edi */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM]) /* 64 bit target */
|
||
{
|
||
/* REX */
|
||
rex_w = (opcode8 >> 3) & 1;
|
||
rex_r = (opcode8 & 0x4) << 1;
|
||
ir.rex_x = (opcode8 & 0x2) << 2;
|
||
ir.rex_b = (opcode8 & 0x1) << 3;
|
||
}
|
||
else /* 32 bit target */
|
||
goto out_prefixes;
|
||
break;
|
||
default:
|
||
goto out_prefixes;
|
||
break;
|
||
}
|
||
}
|
||
out_prefixes:
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM] && rex_w == 1)
|
||
{
|
||
ir.dflag = 2;
|
||
}
|
||
else
|
||
{
|
||
if (prefixes & PREFIX_DATA)
|
||
ir.dflag ^= 1;
|
||
}
|
||
if (prefixes & PREFIX_ADDR)
|
||
ir.aflag ^= 1;
|
||
else if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.aflag = 2;
|
||
|
||
/* Now check op code. */
|
||
opcode = (uint32_t) opcode8;
|
||
reswitch:
|
||
switch (opcode)
|
||
{
|
||
case 0x0f:
|
||
if (record_read_memory (gdbarch, ir.addr, &opcode8, 1))
|
||
return -1;
|
||
ir.addr++;
|
||
opcode = (uint32_t) opcode8 | 0x0f00;
|
||
goto reswitch;
|
||
break;
|
||
|
||
case 0x00: /* arith & logic */
|
||
case 0x01:
|
||
case 0x02:
|
||
case 0x03:
|
||
case 0x04:
|
||
case 0x05:
|
||
case 0x08:
|
||
case 0x09:
|
||
case 0x0a:
|
||
case 0x0b:
|
||
case 0x0c:
|
||
case 0x0d:
|
||
case 0x10:
|
||
case 0x11:
|
||
case 0x12:
|
||
case 0x13:
|
||
case 0x14:
|
||
case 0x15:
|
||
case 0x18:
|
||
case 0x19:
|
||
case 0x1a:
|
||
case 0x1b:
|
||
case 0x1c:
|
||
case 0x1d:
|
||
case 0x20:
|
||
case 0x21:
|
||
case 0x22:
|
||
case 0x23:
|
||
case 0x24:
|
||
case 0x25:
|
||
case 0x28:
|
||
case 0x29:
|
||
case 0x2a:
|
||
case 0x2b:
|
||
case 0x2c:
|
||
case 0x2d:
|
||
case 0x30:
|
||
case 0x31:
|
||
case 0x32:
|
||
case 0x33:
|
||
case 0x34:
|
||
case 0x35:
|
||
case 0x38:
|
||
case 0x39:
|
||
case 0x3a:
|
||
case 0x3b:
|
||
case 0x3c:
|
||
case 0x3d:
|
||
if (((opcode >> 3) & 7) != OP_CMPL)
|
||
{
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
|
||
switch ((opcode >> 1) & 3)
|
||
{
|
||
case 0: /* OP Ev, Gv */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod != 3)
|
||
{
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
ir.rm |= ir.rex_b;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.rm &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm);
|
||
}
|
||
break;
|
||
case 1: /* OP Gv, Ev */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
ir.reg |= rex_r;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.reg &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg);
|
||
break;
|
||
case 2: /* OP A, Iv */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
break;
|
||
}
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x80: /* GRP1 */
|
||
case 0x81:
|
||
case 0x82:
|
||
case 0x83:
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
|
||
if (ir.reg != OP_CMPL)
|
||
{
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
|
||
if (ir.mod != 3)
|
||
{
|
||
if (opcode == 0x83)
|
||
ir.rip_offset = 1;
|
||
else
|
||
ir.rip_offset = (ir.ot > OT_LONG) ? 4 : (1 << ir.ot);
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
else
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm | ir.rex_b);
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x40: /* inc */
|
||
case 0x41:
|
||
case 0x42:
|
||
case 0x43:
|
||
case 0x44:
|
||
case 0x45:
|
||
case 0x46:
|
||
case 0x47:
|
||
|
||
case 0x48: /* dec */
|
||
case 0x49:
|
||
case 0x4a:
|
||
case 0x4b:
|
||
case 0x4c:
|
||
case 0x4d:
|
||
case 0x4e:
|
||
case 0x4f:
|
||
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (opcode & 7);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0xf6: /* GRP3 */
|
||
case 0xf7:
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
|
||
if (ir.mod != 3 && ir.reg == 0)
|
||
ir.rip_offset = (ir.ot > OT_LONG) ? 4 : (1 << ir.ot);
|
||
|
||
switch (ir.reg)
|
||
{
|
||
case 0: /* test */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
case 2: /* not */
|
||
case 3: /* neg */
|
||
if (ir.mod != 3)
|
||
{
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
ir.rm |= ir.rex_b;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.rm &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm);
|
||
}
|
||
if (ir.reg == 3) /* neg */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
case 4: /* mul */
|
||
case 5: /* imul */
|
||
case 6: /* div */
|
||
case 7: /* idiv */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
if (ir.ot != OT_BYTE)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REDX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
default:
|
||
ir.addr -= 2;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case 0xfe: /* GRP4 */
|
||
case 0xff: /* GRP5 */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.reg >= 2 && opcode == 0xfe)
|
||
{
|
||
ir.addr -= 2;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
switch (ir.reg)
|
||
{
|
||
case 0: /* inc */
|
||
case 1: /* dec */
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (ir.mod != 3)
|
||
{
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
ir.rm |= ir.rex_b;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.rm &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm);
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
case 2: /* call */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM] && ir.dflag)
|
||
ir.dflag = 2;
|
||
if (i386_record_push (&ir, 1 << (ir.dflag + 1)))
|
||
return -1;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
case 3: /* lcall */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_CS_REGNUM);
|
||
if (i386_record_push (&ir, 1 << (ir.dflag + 1)))
|
||
return -1;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
case 4: /* jmp */
|
||
case 5: /* ljmp */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
case 6: /* push */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM] && ir.dflag)
|
||
ir.dflag = 2;
|
||
if (i386_record_push (&ir, 1 << (ir.dflag + 1)))
|
||
return -1;
|
||
break;
|
||
default:
|
||
ir.addr -= 2;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case 0x84: /* test */
|
||
case 0x85:
|
||
case 0xa8:
|
||
case 0xa9:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x98: /* CWDE/CBW */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
break;
|
||
|
||
case 0x99: /* CDQ/CWD */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REDX_REGNUM);
|
||
break;
|
||
|
||
case 0x0faf: /* imul */
|
||
case 0x69:
|
||
case 0x6b:
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (opcode == 0x69)
|
||
ir.rip_offset = (ir.ot > OT_LONG) ? 4 : (1 << ir.ot);
|
||
else if (opcode == 0x6b)
|
||
ir.rip_offset = 1;
|
||
ir.reg |= rex_r;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.reg &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0fc0: /* xadd */
|
||
case 0x0fc1:
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
ir.reg |= rex_r;
|
||
if (ir.mod == 3)
|
||
{
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.reg &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg);
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.rm &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm);
|
||
}
|
||
else
|
||
{
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.reg &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg);
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0fb0: /* cmpxchg */
|
||
case 0x0fb1:
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
{
|
||
ir.reg |= rex_r;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.reg &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg);
|
||
}
|
||
else
|
||
{
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0fc7: /* cmpxchg8b */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
{
|
||
ir.addr -= 2;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REDX_REGNUM);
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x50: /* push */
|
||
case 0x51:
|
||
case 0x52:
|
||
case 0x53:
|
||
case 0x54:
|
||
case 0x55:
|
||
case 0x56:
|
||
case 0x57:
|
||
case 0x68:
|
||
case 0x6a:
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM] && ir.dflag)
|
||
ir.dflag = 2;
|
||
if (i386_record_push (&ir, 1 << (ir.dflag + 1)))
|
||
return -1;
|
||
break;
|
||
|
||
case 0x06: /* push es */
|
||
case 0x0e: /* push cs */
|
||
case 0x16: /* push ss */
|
||
case 0x1e: /* push ds */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
if (i386_record_push (&ir, 1 << (ir.dflag + 1)))
|
||
return -1;
|
||
break;
|
||
|
||
case 0x0fa0: /* push fs */
|
||
case 0x0fa8: /* push gs */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 2;
|
||
goto no_support;
|
||
}
|
||
if (i386_record_push (&ir, 1 << (ir.dflag + 1)))
|
||
return -1;
|
||
break;
|
||
|
||
case 0x60: /* pusha */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
if (i386_record_push (&ir, 1 << (ir.dflag + 4)))
|
||
return -1;
|
||
break;
|
||
|
||
case 0x58: /* pop */
|
||
case 0x59:
|
||
case 0x5a:
|
||
case 0x5b:
|
||
case 0x5c:
|
||
case 0x5d:
|
||
case 0x5e:
|
||
case 0x5f:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG ((opcode & 0x7) | ir.rex_b);
|
||
break;
|
||
|
||
case 0x61: /* popa */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
for (regnum = X86_RECORD_REAX_REGNUM;
|
||
regnum <= X86_RECORD_REDI_REGNUM;
|
||
regnum++)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (regnum);
|
||
break;
|
||
|
||
case 0x8f: /* pop */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.ot = ir.dflag ? OT_QUAD : OT_WORD;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm | ir.rex_b);
|
||
else
|
||
{
|
||
ir.popl_esp_hack = 1 << ir.ot;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
break;
|
||
|
||
case 0xc8: /* enter */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REBP_REGNUM);
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM] && ir.dflag)
|
||
ir.dflag = 2;
|
||
if (i386_record_push (&ir, 1 << (ir.dflag + 1)))
|
||
return -1;
|
||
break;
|
||
|
||
case 0xc9: /* leave */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REBP_REGNUM);
|
||
break;
|
||
|
||
case 0x07: /* pop es */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_ES_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x17: /* pop ss */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_SS_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x1f: /* pop ds */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_DS_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0fa1: /* pop fs */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_FS_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0fa9: /* pop gs */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_GS_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x88: /* mov */
|
||
case 0x89:
|
||
case 0xc6:
|
||
case 0xc7:
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
|
||
if (ir.mod != 3)
|
||
{
|
||
if (opcode == 0xc6 || opcode == 0xc7)
|
||
ir.rip_offset = (ir.ot > OT_LONG) ? 4 : (1 << ir.ot);
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
if (opcode == 0xc6 || opcode == 0xc7)
|
||
ir.rm |= ir.rex_b;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.rm &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm);
|
||
}
|
||
break;
|
||
|
||
case 0x8a: /* mov */
|
||
case 0x8b:
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
ir.reg |= rex_r;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.reg &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg);
|
||
break;
|
||
|
||
case 0x8c: /* mov seg */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.reg > 5)
|
||
{
|
||
ir.addr -= 2;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
|
||
if (ir.mod == 3)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm);
|
||
else
|
||
{
|
||
ir.ot = OT_WORD;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
break;
|
||
|
||
case 0x8e: /* mov seg */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
switch (ir.reg)
|
||
{
|
||
case 0:
|
||
regnum = X86_RECORD_ES_REGNUM;
|
||
break;
|
||
case 2:
|
||
regnum = X86_RECORD_SS_REGNUM;
|
||
break;
|
||
case 3:
|
||
regnum = X86_RECORD_DS_REGNUM;
|
||
break;
|
||
case 4:
|
||
regnum = X86_RECORD_FS_REGNUM;
|
||
break;
|
||
case 5:
|
||
regnum = X86_RECORD_GS_REGNUM;
|
||
break;
|
||
default:
|
||
ir.addr -= 2;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
break;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (regnum);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0fb6: /* movzbS */
|
||
case 0x0fb7: /* movzwS */
|
||
case 0x0fbe: /* movsbS */
|
||
case 0x0fbf: /* movswS */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg | rex_r);
|
||
break;
|
||
|
||
case 0x8d: /* lea */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
{
|
||
ir.addr -= 2;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
ir.ot = ir.dflag;
|
||
ir.reg |= rex_r;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.reg &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg);
|
||
break;
|
||
|
||
case 0xa0: /* mov EAX */
|
||
case 0xa1:
|
||
|
||
case 0xd7: /* xlat */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
break;
|
||
|
||
case 0xa2: /* mov EAX */
|
||
case 0xa3:
|
||
if (ir.override >= 0)
|
||
{
|
||
if (record_full_memory_query)
|
||
{
|
||
int q;
|
||
|
||
target_terminal_ours ();
|
||
q = yquery (_("\
|
||
Process record ignores the memory change of instruction at address %s\n\
|
||
because it can't get the value of the segment register.\n\
|
||
Do you want to stop the program?"),
|
||
paddress (gdbarch, ir.orig_addr));
|
||
target_terminal_inferior ();
|
||
if (q)
|
||
return -1;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (ir.aflag == 2)
|
||
{
|
||
if (record_read_memory (gdbarch, ir.addr, buf, 8))
|
||
return -1;
|
||
ir.addr += 8;
|
||
addr = extract_unsigned_integer (buf, 8, byte_order);
|
||
}
|
||
else if (ir.aflag)
|
||
{
|
||
if (record_read_memory (gdbarch, ir.addr, buf, 4))
|
||
return -1;
|
||
ir.addr += 4;
|
||
addr = extract_unsigned_integer (buf, 4, byte_order);
|
||
}
|
||
else
|
||
{
|
||
if (record_read_memory (gdbarch, ir.addr, buf, 2))
|
||
return -1;
|
||
ir.addr += 2;
|
||
addr = extract_unsigned_integer (buf, 2, byte_order);
|
||
}
|
||
if (record_full_arch_list_add_mem (addr, 1 << ir.ot))
|
||
return -1;
|
||
}
|
||
break;
|
||
|
||
case 0xb0: /* mov R, Ib */
|
||
case 0xb1:
|
||
case 0xb2:
|
||
case 0xb3:
|
||
case 0xb4:
|
||
case 0xb5:
|
||
case 0xb6:
|
||
case 0xb7:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG ((ir.regmap[X86_RECORD_R8_REGNUM])
|
||
? ((opcode & 0x7) | ir.rex_b)
|
||
: ((opcode & 0x7) & 0x3));
|
||
break;
|
||
|
||
case 0xb8: /* mov R, Iv */
|
||
case 0xb9:
|
||
case 0xba:
|
||
case 0xbb:
|
||
case 0xbc:
|
||
case 0xbd:
|
||
case 0xbe:
|
||
case 0xbf:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG ((opcode & 0x7) | ir.rex_b);
|
||
break;
|
||
|
||
case 0x91: /* xchg R, EAX */
|
||
case 0x92:
|
||
case 0x93:
|
||
case 0x94:
|
||
case 0x95:
|
||
case 0x96:
|
||
case 0x97:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (opcode & 0x7);
|
||
break;
|
||
|
||
case 0x86: /* xchg Ev, Gv */
|
||
case 0x87:
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
{
|
||
ir.rm |= ir.rex_b;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.rm &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm);
|
||
}
|
||
else
|
||
{
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
ir.reg |= rex_r;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.reg &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg);
|
||
break;
|
||
|
||
case 0xc4: /* les Gv */
|
||
case 0xc5: /* lds Gv */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
/* FALLTHROUGH */
|
||
case 0x0fb2: /* lss Gv */
|
||
case 0x0fb4: /* lfs Gv */
|
||
case 0x0fb5: /* lgs Gv */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
{
|
||
if (opcode > 0xff)
|
||
ir.addr -= 3;
|
||
else
|
||
ir.addr -= 2;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
switch (opcode)
|
||
{
|
||
case 0xc4: /* les Gv */
|
||
regnum = X86_RECORD_ES_REGNUM;
|
||
break;
|
||
case 0xc5: /* lds Gv */
|
||
regnum = X86_RECORD_DS_REGNUM;
|
||
break;
|
||
case 0x0fb2: /* lss Gv */
|
||
regnum = X86_RECORD_SS_REGNUM;
|
||
break;
|
||
case 0x0fb4: /* lfs Gv */
|
||
regnum = X86_RECORD_FS_REGNUM;
|
||
break;
|
||
case 0x0fb5: /* lgs Gv */
|
||
regnum = X86_RECORD_GS_REGNUM;
|
||
break;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (regnum);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg | rex_r);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0xc0: /* shifts */
|
||
case 0xc1:
|
||
case 0xd0:
|
||
case 0xd1:
|
||
case 0xd2:
|
||
case 0xd3:
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod != 3 && (opcode == 0xd2 || opcode == 0xd3))
|
||
{
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
ir.rm |= ir.rex_b;
|
||
if (ir.ot == OT_BYTE && !ir.regmap[X86_RECORD_R8_REGNUM])
|
||
ir.rm &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm);
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0fa4:
|
||
case 0x0fa5:
|
||
case 0x0fac:
|
||
case 0x0fad:
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
{
|
||
if (record_full_arch_list_add_reg (ir.regcache, ir.rm))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
break;
|
||
|
||
case 0xd8: /* Floats. */
|
||
case 0xd9:
|
||
case 0xda:
|
||
case 0xdb:
|
||
case 0xdc:
|
||
case 0xdd:
|
||
case 0xde:
|
||
case 0xdf:
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
ir.reg |= ((opcode & 7) << 3);
|
||
if (ir.mod != 3)
|
||
{
|
||
/* Memory. */
|
||
uint64_t addr64;
|
||
|
||
if (i386_record_lea_modrm_addr (&ir, &addr64))
|
||
return -1;
|
||
switch (ir.reg)
|
||
{
|
||
case 0x02:
|
||
case 0x12:
|
||
case 0x22:
|
||
case 0x32:
|
||
/* For fcom, ficom nothing to do. */
|
||
break;
|
||
case 0x03:
|
||
case 0x13:
|
||
case 0x23:
|
||
case 0x33:
|
||
/* For fcomp, ficomp pop FPU stack, store all. */
|
||
if (i386_record_floats (gdbarch, &ir, I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
break;
|
||
case 0x00:
|
||
case 0x01:
|
||
case 0x04:
|
||
case 0x05:
|
||
case 0x06:
|
||
case 0x07:
|
||
case 0x10:
|
||
case 0x11:
|
||
case 0x14:
|
||
case 0x15:
|
||
case 0x16:
|
||
case 0x17:
|
||
case 0x20:
|
||
case 0x21:
|
||
case 0x24:
|
||
case 0x25:
|
||
case 0x26:
|
||
case 0x27:
|
||
case 0x30:
|
||
case 0x31:
|
||
case 0x34:
|
||
case 0x35:
|
||
case 0x36:
|
||
case 0x37:
|
||
/* For fadd, fmul, fsub, fsubr, fdiv, fdivr, fiadd, fimul,
|
||
fisub, fisubr, fidiv, fidivr, modR/M.reg is an extension
|
||
of code, always affects st(0) register. */
|
||
if (i386_record_floats (gdbarch, &ir, I387_ST0_REGNUM (tdep)))
|
||
return -1;
|
||
break;
|
||
case 0x08:
|
||
case 0x0a:
|
||
case 0x0b:
|
||
case 0x18:
|
||
case 0x19:
|
||
case 0x1a:
|
||
case 0x1b:
|
||
case 0x1d:
|
||
case 0x28:
|
||
case 0x29:
|
||
case 0x2a:
|
||
case 0x2b:
|
||
case 0x38:
|
||
case 0x39:
|
||
case 0x3a:
|
||
case 0x3b:
|
||
case 0x3c:
|
||
case 0x3d:
|
||
switch (ir.reg & 7)
|
||
{
|
||
case 0:
|
||
/* Handling fld, fild. */
|
||
if (i386_record_floats (gdbarch, &ir, I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
break;
|
||
case 1:
|
||
switch (ir.reg >> 4)
|
||
{
|
||
case 0:
|
||
if (record_full_arch_list_add_mem (addr64, 4))
|
||
return -1;
|
||
break;
|
||
case 2:
|
||
if (record_full_arch_list_add_mem (addr64, 8))
|
||
return -1;
|
||
break;
|
||
case 3:
|
||
break;
|
||
default:
|
||
if (record_full_arch_list_add_mem (addr64, 2))
|
||
return -1;
|
||
break;
|
||
}
|
||
break;
|
||
default:
|
||
switch (ir.reg >> 4)
|
||
{
|
||
case 0:
|
||
if (record_full_arch_list_add_mem (addr64, 4))
|
||
return -1;
|
||
if (3 == (ir.reg & 7))
|
||
{
|
||
/* For fstp m32fp. */
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
}
|
||
break;
|
||
case 1:
|
||
if (record_full_arch_list_add_mem (addr64, 4))
|
||
return -1;
|
||
if ((3 == (ir.reg & 7))
|
||
|| (5 == (ir.reg & 7))
|
||
|| (7 == (ir.reg & 7)))
|
||
{
|
||
/* For fstp insn. */
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
}
|
||
break;
|
||
case 2:
|
||
if (record_full_arch_list_add_mem (addr64, 8))
|
||
return -1;
|
||
if (3 == (ir.reg & 7))
|
||
{
|
||
/* For fstp m64fp. */
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
}
|
||
break;
|
||
case 3:
|
||
if ((3 <= (ir.reg & 7)) && (6 <= (ir.reg & 7)))
|
||
{
|
||
/* For fistp, fbld, fild, fbstp. */
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
}
|
||
/* Fall through */
|
||
default:
|
||
if (record_full_arch_list_add_mem (addr64, 2))
|
||
return -1;
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
break;
|
||
case 0x0c:
|
||
/* Insn fldenv. */
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I386_SAVE_FPU_ENV_REG_STACK))
|
||
return -1;
|
||
break;
|
||
case 0x0d:
|
||
/* Insn fldcw. */
|
||
if (i386_record_floats (gdbarch, &ir, I387_FCTRL_REGNUM (tdep)))
|
||
return -1;
|
||
break;
|
||
case 0x2c:
|
||
/* Insn frstor. */
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I386_SAVE_FPU_ENV_REG_STACK))
|
||
return -1;
|
||
break;
|
||
case 0x0e:
|
||
if (ir.dflag)
|
||
{
|
||
if (record_full_arch_list_add_mem (addr64, 28))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
if (record_full_arch_list_add_mem (addr64, 14))
|
||
return -1;
|
||
}
|
||
break;
|
||
case 0x0f:
|
||
case 0x2f:
|
||
if (record_full_arch_list_add_mem (addr64, 2))
|
||
return -1;
|
||
/* Insn fstp, fbstp. */
|
||
if (i386_record_floats (gdbarch, &ir, I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
break;
|
||
case 0x1f:
|
||
case 0x3e:
|
||
if (record_full_arch_list_add_mem (addr64, 10))
|
||
return -1;
|
||
break;
|
||
case 0x2e:
|
||
if (ir.dflag)
|
||
{
|
||
if (record_full_arch_list_add_mem (addr64, 28))
|
||
return -1;
|
||
addr64 += 28;
|
||
}
|
||
else
|
||
{
|
||
if (record_full_arch_list_add_mem (addr64, 14))
|
||
return -1;
|
||
addr64 += 14;
|
||
}
|
||
if (record_full_arch_list_add_mem (addr64, 80))
|
||
return -1;
|
||
/* Insn fsave. */
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I386_SAVE_FPU_ENV_REG_STACK))
|
||
return -1;
|
||
break;
|
||
case 0x3f:
|
||
if (record_full_arch_list_add_mem (addr64, 8))
|
||
return -1;
|
||
/* Insn fistp. */
|
||
if (i386_record_floats (gdbarch, &ir, I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
break;
|
||
default:
|
||
ir.addr -= 2;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
break;
|
||
}
|
||
}
|
||
/* Opcode is an extension of modR/M byte. */
|
||
else
|
||
{
|
||
switch (opcode)
|
||
{
|
||
case 0xd8:
|
||
if (i386_record_floats (gdbarch, &ir, I387_ST0_REGNUM (tdep)))
|
||
return -1;
|
||
break;
|
||
case 0xd9:
|
||
if (0x0c == (ir.modrm >> 4))
|
||
{
|
||
if ((ir.modrm & 0x0f) <= 7)
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep)))
|
||
return -1;
|
||
/* If only st(0) is changing, then we have already
|
||
recorded. */
|
||
if ((ir.modrm & 0x0f) - 0x08)
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep) +
|
||
((ir.modrm & 0x0f) - 0x08)))
|
||
return -1;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
switch (ir.modrm)
|
||
{
|
||
case 0xe0:
|
||
case 0xe1:
|
||
case 0xf0:
|
||
case 0xf5:
|
||
case 0xf8:
|
||
case 0xfa:
|
||
case 0xfc:
|
||
case 0xfe:
|
||
case 0xff:
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep)))
|
||
return -1;
|
||
break;
|
||
case 0xf1:
|
||
case 0xf2:
|
||
case 0xf3:
|
||
case 0xf4:
|
||
case 0xf6:
|
||
case 0xf7:
|
||
case 0xe8:
|
||
case 0xe9:
|
||
case 0xea:
|
||
case 0xeb:
|
||
case 0xec:
|
||
case 0xed:
|
||
case 0xee:
|
||
case 0xf9:
|
||
case 0xfb:
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
break;
|
||
case 0xfd:
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep)))
|
||
return -1;
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep) + 1))
|
||
return -1;
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
case 0xda:
|
||
if (0xe9 == ir.modrm)
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir, I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
}
|
||
else if ((0x0c == ir.modrm >> 4) || (0x0d == ir.modrm >> 4))
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep)))
|
||
return -1;
|
||
if (((ir.modrm & 0x0f) > 0) && ((ir.modrm & 0x0f) <= 7))
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep) +
|
||
(ir.modrm & 0x0f)))
|
||
return -1;
|
||
}
|
||
else if ((ir.modrm & 0x0f) - 0x08)
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep) +
|
||
((ir.modrm & 0x0f) - 0x08)))
|
||
return -1;
|
||
}
|
||
}
|
||
break;
|
||
case 0xdb:
|
||
if (0xe3 == ir.modrm)
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir, I386_SAVE_FPU_ENV))
|
||
return -1;
|
||
}
|
||
else if ((0x0c == ir.modrm >> 4) || (0x0d == ir.modrm >> 4))
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep)))
|
||
return -1;
|
||
if (((ir.modrm & 0x0f) > 0) && ((ir.modrm & 0x0f) <= 7))
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep) +
|
||
(ir.modrm & 0x0f)))
|
||
return -1;
|
||
}
|
||
else if ((ir.modrm & 0x0f) - 0x08)
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep) +
|
||
((ir.modrm & 0x0f) - 0x08)))
|
||
return -1;
|
||
}
|
||
}
|
||
break;
|
||
case 0xdc:
|
||
if ((0x0c == ir.modrm >> 4)
|
||
|| (0x0d == ir.modrm >> 4)
|
||
|| (0x0f == ir.modrm >> 4))
|
||
{
|
||
if ((ir.modrm & 0x0f) <= 7)
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep) +
|
||
(ir.modrm & 0x0f)))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep) +
|
||
((ir.modrm & 0x0f) - 0x08)))
|
||
return -1;
|
||
}
|
||
}
|
||
break;
|
||
case 0xdd:
|
||
if (0x0c == ir.modrm >> 4)
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_FTAG_REGNUM (tdep)))
|
||
return -1;
|
||
}
|
||
else if ((0x0d == ir.modrm >> 4) || (0x0e == ir.modrm >> 4))
|
||
{
|
||
if ((ir.modrm & 0x0f) <= 7)
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I387_ST0_REGNUM (tdep) +
|
||
(ir.modrm & 0x0f)))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir,
|
||
I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
}
|
||
}
|
||
break;
|
||
case 0xde:
|
||
if ((0x0c == ir.modrm >> 4)
|
||
|| (0x0e == ir.modrm >> 4)
|
||
|| (0x0f == ir.modrm >> 4)
|
||
|| (0xd9 == ir.modrm))
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir, I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
}
|
||
break;
|
||
case 0xdf:
|
||
if (0xe0 == ir.modrm)
|
||
{
|
||
if (record_full_arch_list_add_reg (ir.regcache,
|
||
I386_EAX_REGNUM))
|
||
return -1;
|
||
}
|
||
else if ((0x0f == ir.modrm >> 4) || (0x0e == ir.modrm >> 4))
|
||
{
|
||
if (i386_record_floats (gdbarch, &ir, I386_SAVE_FPU_REGS))
|
||
return -1;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
/* string ops */
|
||
case 0xa4: /* movsS */
|
||
case 0xa5:
|
||
case 0xaa: /* stosS */
|
||
case 0xab:
|
||
case 0x6c: /* insS */
|
||
case 0x6d:
|
||
regcache_raw_read_unsigned (ir.regcache,
|
||
ir.regmap[X86_RECORD_RECX_REGNUM],
|
||
&addr);
|
||
if (addr)
|
||
{
|
||
ULONGEST es, ds;
|
||
|
||
if ((opcode & 1) == 0)
|
||
ir.ot = OT_BYTE;
|
||
else
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
regcache_raw_read_unsigned (ir.regcache,
|
||
ir.regmap[X86_RECORD_REDI_REGNUM],
|
||
&addr);
|
||
|
||
regcache_raw_read_unsigned (ir.regcache,
|
||
ir.regmap[X86_RECORD_ES_REGNUM],
|
||
&es);
|
||
regcache_raw_read_unsigned (ir.regcache,
|
||
ir.regmap[X86_RECORD_DS_REGNUM],
|
||
&ds);
|
||
if (ir.aflag && (es != ds))
|
||
{
|
||
/* addr += ((uint32_t) read_register (I386_ES_REGNUM)) << 4; */
|
||
if (record_full_memory_query)
|
||
{
|
||
int q;
|
||
|
||
target_terminal_ours ();
|
||
q = yquery (_("\
|
||
Process record ignores the memory change of instruction at address %s\n\
|
||
because it can't get the value of the segment register.\n\
|
||
Do you want to stop the program?"),
|
||
paddress (gdbarch, ir.orig_addr));
|
||
target_terminal_inferior ();
|
||
if (q)
|
||
return -1;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (record_full_arch_list_add_mem (addr, 1 << ir.ot))
|
||
return -1;
|
||
}
|
||
|
||
if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ))
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RECX_REGNUM);
|
||
if (opcode == 0xa4 || opcode == 0xa5)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESI_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REDI_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
}
|
||
break;
|
||
|
||
case 0xa6: /* cmpsS */
|
||
case 0xa7:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REDI_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESI_REGNUM);
|
||
if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ))
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RECX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0xac: /* lodsS */
|
||
case 0xad:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESI_REGNUM);
|
||
if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ))
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RECX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0xae: /* scasS */
|
||
case 0xaf:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REDI_REGNUM);
|
||
if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ))
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RECX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x6e: /* outsS */
|
||
case 0x6f:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESI_REGNUM);
|
||
if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ))
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RECX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0xe4: /* port I/O */
|
||
case 0xe5:
|
||
case 0xec:
|
||
case 0xed:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
break;
|
||
|
||
case 0xe6:
|
||
case 0xe7:
|
||
case 0xee:
|
||
case 0xef:
|
||
break;
|
||
|
||
/* control */
|
||
case 0xc2: /* ret im */
|
||
case 0xc3: /* ret */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0xca: /* lret im */
|
||
case 0xcb: /* lret */
|
||
case 0xcf: /* iret */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_CS_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0xe8: /* call im */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM] && ir.dflag)
|
||
ir.dflag = 2;
|
||
if (i386_record_push (&ir, 1 << (ir.dflag + 1)))
|
||
return -1;
|
||
break;
|
||
|
||
case 0x9a: /* lcall im */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_CS_REGNUM);
|
||
if (i386_record_push (&ir, 1 << (ir.dflag + 1)))
|
||
return -1;
|
||
break;
|
||
|
||
case 0xe9: /* jmp im */
|
||
case 0xea: /* ljmp im */
|
||
case 0xeb: /* jmp Jb */
|
||
case 0x70: /* jcc Jb */
|
||
case 0x71:
|
||
case 0x72:
|
||
case 0x73:
|
||
case 0x74:
|
||
case 0x75:
|
||
case 0x76:
|
||
case 0x77:
|
||
case 0x78:
|
||
case 0x79:
|
||
case 0x7a:
|
||
case 0x7b:
|
||
case 0x7c:
|
||
case 0x7d:
|
||
case 0x7e:
|
||
case 0x7f:
|
||
case 0x0f80: /* jcc Jv */
|
||
case 0x0f81:
|
||
case 0x0f82:
|
||
case 0x0f83:
|
||
case 0x0f84:
|
||
case 0x0f85:
|
||
case 0x0f86:
|
||
case 0x0f87:
|
||
case 0x0f88:
|
||
case 0x0f89:
|
||
case 0x0f8a:
|
||
case 0x0f8b:
|
||
case 0x0f8c:
|
||
case 0x0f8d:
|
||
case 0x0f8e:
|
||
case 0x0f8f:
|
||
break;
|
||
|
||
case 0x0f90: /* setcc Gv */
|
||
case 0x0f91:
|
||
case 0x0f92:
|
||
case 0x0f93:
|
||
case 0x0f94:
|
||
case 0x0f95:
|
||
case 0x0f96:
|
||
case 0x0f97:
|
||
case 0x0f98:
|
||
case 0x0f99:
|
||
case 0x0f9a:
|
||
case 0x0f9b:
|
||
case 0x0f9c:
|
||
case 0x0f9d:
|
||
case 0x0f9e:
|
||
case 0x0f9f:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
ir.ot = OT_BYTE;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rex_b ? (ir.rm | ir.rex_b)
|
||
: (ir.rm & 0x3));
|
||
else
|
||
{
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
break;
|
||
|
||
case 0x0f40: /* cmov Gv, Ev */
|
||
case 0x0f41:
|
||
case 0x0f42:
|
||
case 0x0f43:
|
||
case 0x0f44:
|
||
case 0x0f45:
|
||
case 0x0f46:
|
||
case 0x0f47:
|
||
case 0x0f48:
|
||
case 0x0f49:
|
||
case 0x0f4a:
|
||
case 0x0f4b:
|
||
case 0x0f4c:
|
||
case 0x0f4d:
|
||
case 0x0f4e:
|
||
case 0x0f4f:
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
ir.reg |= rex_r;
|
||
if (ir.dflag == OT_BYTE)
|
||
ir.reg &= 0x3;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg);
|
||
break;
|
||
|
||
/* flags */
|
||
case 0x9c: /* pushf */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM] && ir.dflag)
|
||
ir.dflag = 2;
|
||
if (i386_record_push (&ir, 1 << (ir.dflag + 1)))
|
||
return -1;
|
||
break;
|
||
|
||
case 0x9d: /* popf */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x9e: /* sahf */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
/* FALLTHROUGH */
|
||
case 0xf5: /* cmc */
|
||
case 0xf8: /* clc */
|
||
case 0xf9: /* stc */
|
||
case 0xfc: /* cld */
|
||
case 0xfd: /* std */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x9f: /* lahf */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
break;
|
||
|
||
/* bit operations */
|
||
case 0x0fba: /* bt/bts/btr/btc Gv, im */
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.reg < 4)
|
||
{
|
||
ir.addr -= 2;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
if (ir.reg != 4)
|
||
{
|
||
if (ir.mod == 3)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm | ir.rex_b);
|
||
else
|
||
{
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0fa3: /* bt Gv, Ev */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0fab: /* bts */
|
||
case 0x0fb3: /* btr */
|
||
case 0x0fbb: /* btc */
|
||
ir.ot = ir.dflag + OT_WORD;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm | ir.rex_b);
|
||
else
|
||
{
|
||
uint64_t addr64;
|
||
if (i386_record_lea_modrm_addr (&ir, &addr64))
|
||
return -1;
|
||
regcache_raw_read_unsigned (ir.regcache,
|
||
ir.regmap[ir.reg | rex_r],
|
||
&addr);
|
||
switch (ir.dflag)
|
||
{
|
||
case 0:
|
||
addr64 += ((int16_t) addr >> 4) << 4;
|
||
break;
|
||
case 1:
|
||
addr64 += ((int32_t) addr >> 5) << 5;
|
||
break;
|
||
case 2:
|
||
addr64 += ((int64_t) addr >> 6) << 6;
|
||
break;
|
||
}
|
||
if (record_full_arch_list_add_mem (addr64, 1 << ir.ot))
|
||
return -1;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0fbc: /* bsf */
|
||
case 0x0fbd: /* bsr */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg | rex_r);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
/* bcd */
|
||
case 0x27: /* daa */
|
||
case 0x2f: /* das */
|
||
case 0x37: /* aaa */
|
||
case 0x3f: /* aas */
|
||
case 0xd4: /* aam */
|
||
case 0xd5: /* aad */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
/* misc */
|
||
case 0x90: /* nop */
|
||
if (prefixes & PREFIX_LOCK)
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
break;
|
||
|
||
case 0x9b: /* fwait */
|
||
if (record_read_memory (gdbarch, ir.addr, &opcode8, 1))
|
||
return -1;
|
||
opcode = (uint32_t) opcode8;
|
||
ir.addr++;
|
||
goto reswitch;
|
||
break;
|
||
|
||
/* XXX */
|
||
case 0xcc: /* int3 */
|
||
printf_unfiltered (_("Process record does not support instruction "
|
||
"int3.\n"));
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
break;
|
||
|
||
/* XXX */
|
||
case 0xcd: /* int */
|
||
{
|
||
int ret;
|
||
uint8_t interrupt;
|
||
if (record_read_memory (gdbarch, ir.addr, &interrupt, 1))
|
||
return -1;
|
||
ir.addr++;
|
||
if (interrupt != 0x80
|
||
|| tdep->i386_intx80_record == NULL)
|
||
{
|
||
printf_unfiltered (_("Process record does not support "
|
||
"instruction int 0x%02x.\n"),
|
||
interrupt);
|
||
ir.addr -= 2;
|
||
goto no_support;
|
||
}
|
||
ret = tdep->i386_intx80_record (ir.regcache);
|
||
if (ret)
|
||
return ret;
|
||
}
|
||
break;
|
||
|
||
/* XXX */
|
||
case 0xce: /* into */
|
||
printf_unfiltered (_("Process record does not support "
|
||
"instruction into.\n"));
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
break;
|
||
|
||
case 0xfa: /* cli */
|
||
case 0xfb: /* sti */
|
||
break;
|
||
|
||
case 0x62: /* bound */
|
||
printf_unfiltered (_("Process record does not support "
|
||
"instruction bound.\n"));
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
break;
|
||
|
||
case 0x0fc8: /* bswap reg */
|
||
case 0x0fc9:
|
||
case 0x0fca:
|
||
case 0x0fcb:
|
||
case 0x0fcc:
|
||
case 0x0fcd:
|
||
case 0x0fce:
|
||
case 0x0fcf:
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG ((opcode & 7) | ir.rex_b);
|
||
break;
|
||
|
||
case 0xd6: /* salc */
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0xe0: /* loopnz */
|
||
case 0xe1: /* loopz */
|
||
case 0xe2: /* loop */
|
||
case 0xe3: /* jecxz */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RECX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0f30: /* wrmsr */
|
||
printf_unfiltered (_("Process record does not support "
|
||
"instruction wrmsr.\n"));
|
||
ir.addr -= 2;
|
||
goto no_support;
|
||
break;
|
||
|
||
case 0x0f32: /* rdmsr */
|
||
printf_unfiltered (_("Process record does not support "
|
||
"instruction rdmsr.\n"));
|
||
ir.addr -= 2;
|
||
goto no_support;
|
||
break;
|
||
|
||
case 0x0f31: /* rdtsc */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REDX_REGNUM);
|
||
break;
|
||
|
||
case 0x0f34: /* sysenter */
|
||
{
|
||
int ret;
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
ir.addr -= 2;
|
||
goto no_support;
|
||
}
|
||
if (tdep->i386_sysenter_record == NULL)
|
||
{
|
||
printf_unfiltered (_("Process record does not support "
|
||
"instruction sysenter.\n"));
|
||
ir.addr -= 2;
|
||
goto no_support;
|
||
}
|
||
ret = tdep->i386_sysenter_record (ir.regcache);
|
||
if (ret)
|
||
return ret;
|
||
}
|
||
break;
|
||
|
||
case 0x0f35: /* sysexit */
|
||
printf_unfiltered (_("Process record does not support "
|
||
"instruction sysexit.\n"));
|
||
ir.addr -= 2;
|
||
goto no_support;
|
||
break;
|
||
|
||
case 0x0f05: /* syscall */
|
||
{
|
||
int ret;
|
||
if (tdep->i386_syscall_record == NULL)
|
||
{
|
||
printf_unfiltered (_("Process record does not support "
|
||
"instruction syscall.\n"));
|
||
ir.addr -= 2;
|
||
goto no_support;
|
||
}
|
||
ret = tdep->i386_syscall_record (ir.regcache);
|
||
if (ret)
|
||
return ret;
|
||
}
|
||
break;
|
||
|
||
case 0x0f07: /* sysret */
|
||
printf_unfiltered (_("Process record does not support "
|
||
"instruction sysret.\n"));
|
||
ir.addr -= 2;
|
||
goto no_support;
|
||
break;
|
||
|
||
case 0x0fa2: /* cpuid */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RECX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REDX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REBX_REGNUM);
|
||
break;
|
||
|
||
case 0xf4: /* hlt */
|
||
printf_unfiltered (_("Process record does not support "
|
||
"instruction hlt.\n"));
|
||
ir.addr -= 1;
|
||
goto no_support;
|
||
break;
|
||
|
||
case 0x0f00:
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
switch (ir.reg)
|
||
{
|
||
case 0: /* sldt */
|
||
case 1: /* str */
|
||
if (ir.mod == 3)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm | ir.rex_b);
|
||
else
|
||
{
|
||
ir.ot = OT_WORD;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
break;
|
||
case 2: /* lldt */
|
||
case 3: /* ltr */
|
||
break;
|
||
case 4: /* verr */
|
||
case 5: /* verw */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
default:
|
||
ir.addr -= 3;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case 0x0f01:
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
switch (ir.reg)
|
||
{
|
||
case 0: /* sgdt */
|
||
{
|
||
uint64_t addr64;
|
||
|
||
if (ir.mod == 3)
|
||
{
|
||
ir.addr -= 3;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
if (ir.override >= 0)
|
||
{
|
||
if (record_full_memory_query)
|
||
{
|
||
int q;
|
||
|
||
target_terminal_ours ();
|
||
q = yquery (_("\
|
||
Process record ignores the memory change of instruction at address %s\n\
|
||
because it can't get the value of the segment register.\n\
|
||
Do you want to stop the program?"),
|
||
paddress (gdbarch, ir.orig_addr));
|
||
target_terminal_inferior ();
|
||
if (q)
|
||
return -1;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (i386_record_lea_modrm_addr (&ir, &addr64))
|
||
return -1;
|
||
if (record_full_arch_list_add_mem (addr64, 2))
|
||
return -1;
|
||
addr64 += 2;
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
if (record_full_arch_list_add_mem (addr64, 8))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
if (record_full_arch_list_add_mem (addr64, 4))
|
||
return -1;
|
||
}
|
||
}
|
||
}
|
||
break;
|
||
case 1:
|
||
if (ir.mod == 3)
|
||
{
|
||
switch (ir.rm)
|
||
{
|
||
case 0: /* monitor */
|
||
break;
|
||
case 1: /* mwait */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
default:
|
||
ir.addr -= 3;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* sidt */
|
||
if (ir.override >= 0)
|
||
{
|
||
if (record_full_memory_query)
|
||
{
|
||
int q;
|
||
|
||
target_terminal_ours ();
|
||
q = yquery (_("\
|
||
Process record ignores the memory change of instruction at address %s\n\
|
||
because it can't get the value of the segment register.\n\
|
||
Do you want to stop the program?"),
|
||
paddress (gdbarch, ir.orig_addr));
|
||
target_terminal_inferior ();
|
||
if (q)
|
||
return -1;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
uint64_t addr64;
|
||
|
||
if (i386_record_lea_modrm_addr (&ir, &addr64))
|
||
return -1;
|
||
if (record_full_arch_list_add_mem (addr64, 2))
|
||
return -1;
|
||
addr64 += 2;
|
||
if (ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
if (record_full_arch_list_add_mem (addr64, 8))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
if (record_full_arch_list_add_mem (addr64, 4))
|
||
return -1;
|
||
}
|
||
}
|
||
}
|
||
break;
|
||
case 2: /* lgdt */
|
||
if (ir.mod == 3)
|
||
{
|
||
/* xgetbv */
|
||
if (ir.rm == 0)
|
||
{
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REDX_REGNUM);
|
||
break;
|
||
}
|
||
/* xsetbv */
|
||
else if (ir.rm == 1)
|
||
break;
|
||
}
|
||
case 3: /* lidt */
|
||
if (ir.mod == 3)
|
||
{
|
||
ir.addr -= 3;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
break;
|
||
case 4: /* smsw */
|
||
if (ir.mod == 3)
|
||
{
|
||
if (record_full_arch_list_add_reg (ir.regcache, ir.rm | ir.rex_b))
|
||
return -1;
|
||
}
|
||
else
|
||
{
|
||
ir.ot = OT_WORD;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
case 6: /* lmsw */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
case 7: /* invlpg */
|
||
if (ir.mod == 3)
|
||
{
|
||
if (ir.rm == 0 && ir.regmap[X86_RECORD_R8_REGNUM])
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_GS_REGNUM);
|
||
else
|
||
{
|
||
ir.addr -= 3;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
}
|
||
else
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
default:
|
||
ir.addr -= 3;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case 0x0f08: /* invd */
|
||
case 0x0f09: /* wbinvd */
|
||
break;
|
||
|
||
case 0x63: /* arpl */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3 || ir.regmap[X86_RECORD_R8_REGNUM])
|
||
{
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.regmap[X86_RECORD_R8_REGNUM]
|
||
? (ir.reg | rex_r) : ir.rm);
|
||
}
|
||
else
|
||
{
|
||
ir.ot = ir.dflag ? OT_LONG : OT_WORD;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
if (!ir.regmap[X86_RECORD_R8_REGNUM])
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0f02: /* lar */
|
||
case 0x0f03: /* lsl */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg | rex_r);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0f18:
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3 && ir.reg == 3)
|
||
{
|
||
ir.addr -= 3;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
break;
|
||
|
||
case 0x0f19:
|
||
case 0x0f1a:
|
||
case 0x0f1b:
|
||
case 0x0f1c:
|
||
case 0x0f1d:
|
||
case 0x0f1e:
|
||
case 0x0f1f:
|
||
/* nop (multi byte) */
|
||
break;
|
||
|
||
case 0x0f20: /* mov reg, crN */
|
||
case 0x0f22: /* mov crN, reg */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if ((ir.modrm & 0xc0) != 0xc0)
|
||
{
|
||
ir.addr -= 3;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
switch (ir.reg)
|
||
{
|
||
case 0:
|
||
case 2:
|
||
case 3:
|
||
case 4:
|
||
case 8:
|
||
if (opcode & 2)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
else
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm | ir.rex_b);
|
||
break;
|
||
default:
|
||
ir.addr -= 3;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case 0x0f21: /* mov reg, drN */
|
||
case 0x0f23: /* mov drN, reg */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if ((ir.modrm & 0xc0) != 0xc0 || ir.reg == 4
|
||
|| ir.reg == 5 || ir.reg >= 8)
|
||
{
|
||
ir.addr -= 3;
|
||
opcode = opcode << 8 | ir.modrm;
|
||
goto no_support;
|
||
}
|
||
if (opcode & 2)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
else
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm | ir.rex_b);
|
||
break;
|
||
|
||
case 0x0f06: /* clts */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
/* MMX 3DNow! SSE SSE2 SSE3 SSSE3 SSE4 */
|
||
|
||
case 0x0f0d: /* 3DNow! prefetch */
|
||
break;
|
||
|
||
case 0x0f0e: /* 3DNow! femms */
|
||
case 0x0f77: /* emms */
|
||
if (i386_fpc_regnum_p (gdbarch, I387_FTAG_REGNUM(tdep)))
|
||
goto no_support;
|
||
record_full_arch_list_add_reg (ir.regcache, I387_FTAG_REGNUM(tdep));
|
||
break;
|
||
|
||
case 0x0f0f: /* 3DNow! data */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (record_read_memory (gdbarch, ir.addr, &opcode8, 1))
|
||
return -1;
|
||
ir.addr++;
|
||
switch (opcode8)
|
||
{
|
||
case 0x0c: /* 3DNow! pi2fw */
|
||
case 0x0d: /* 3DNow! pi2fd */
|
||
case 0x1c: /* 3DNow! pf2iw */
|
||
case 0x1d: /* 3DNow! pf2id */
|
||
case 0x8a: /* 3DNow! pfnacc */
|
||
case 0x8e: /* 3DNow! pfpnacc */
|
||
case 0x90: /* 3DNow! pfcmpge */
|
||
case 0x94: /* 3DNow! pfmin */
|
||
case 0x96: /* 3DNow! pfrcp */
|
||
case 0x97: /* 3DNow! pfrsqrt */
|
||
case 0x9a: /* 3DNow! pfsub */
|
||
case 0x9e: /* 3DNow! pfadd */
|
||
case 0xa0: /* 3DNow! pfcmpgt */
|
||
case 0xa4: /* 3DNow! pfmax */
|
||
case 0xa6: /* 3DNow! pfrcpit1 */
|
||
case 0xa7: /* 3DNow! pfrsqit1 */
|
||
case 0xaa: /* 3DNow! pfsubr */
|
||
case 0xae: /* 3DNow! pfacc */
|
||
case 0xb0: /* 3DNow! pfcmpeq */
|
||
case 0xb4: /* 3DNow! pfmul */
|
||
case 0xb6: /* 3DNow! pfrcpit2 */
|
||
case 0xb7: /* 3DNow! pmulhrw */
|
||
case 0xbb: /* 3DNow! pswapd */
|
||
case 0xbf: /* 3DNow! pavgusb */
|
||
if (!i386_mmx_regnum_p (gdbarch, I387_MM0_REGNUM (tdep) + ir.reg))
|
||
goto no_support_3dnow_data;
|
||
record_full_arch_list_add_reg (ir.regcache, ir.reg);
|
||
break;
|
||
|
||
default:
|
||
no_support_3dnow_data:
|
||
opcode = (opcode << 8) | opcode8;
|
||
goto no_support;
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case 0x0faa: /* rsm */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REAX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RECX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REDX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REBX_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REBP_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_RESI_REGNUM);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REDI_REGNUM);
|
||
break;
|
||
|
||
case 0x0fae:
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
switch(ir.reg)
|
||
{
|
||
case 0: /* fxsave */
|
||
{
|
||
uint64_t tmpu64;
|
||
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
if (i386_record_lea_modrm_addr (&ir, &tmpu64))
|
||
return -1;
|
||
if (record_full_arch_list_add_mem (tmpu64, 512))
|
||
return -1;
|
||
}
|
||
break;
|
||
|
||
case 1: /* fxrstor */
|
||
{
|
||
int i;
|
||
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
|
||
for (i = I387_MM0_REGNUM (tdep);
|
||
i386_mmx_regnum_p (gdbarch, i); i++)
|
||
record_full_arch_list_add_reg (ir.regcache, i);
|
||
|
||
for (i = I387_XMM0_REGNUM (tdep);
|
||
i386_xmm_regnum_p (gdbarch, i); i++)
|
||
record_full_arch_list_add_reg (ir.regcache, i);
|
||
|
||
if (i386_mxcsr_regnum_p (gdbarch, I387_MXCSR_REGNUM(tdep)))
|
||
record_full_arch_list_add_reg (ir.regcache,
|
||
I387_MXCSR_REGNUM(tdep));
|
||
|
||
for (i = I387_ST0_REGNUM (tdep);
|
||
i386_fp_regnum_p (gdbarch, i); i++)
|
||
record_full_arch_list_add_reg (ir.regcache, i);
|
||
|
||
for (i = I387_FCTRL_REGNUM (tdep);
|
||
i386_fpc_regnum_p (gdbarch, i); i++)
|
||
record_full_arch_list_add_reg (ir.regcache, i);
|
||
}
|
||
break;
|
||
|
||
case 2: /* ldmxcsr */
|
||
if (!i386_mxcsr_regnum_p (gdbarch, I387_MXCSR_REGNUM(tdep)))
|
||
goto no_support;
|
||
record_full_arch_list_add_reg (ir.regcache, I387_MXCSR_REGNUM(tdep));
|
||
break;
|
||
|
||
case 3: /* stmxcsr */
|
||
ir.ot = OT_LONG;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
break;
|
||
|
||
case 5: /* lfence */
|
||
case 6: /* mfence */
|
||
case 7: /* sfence clflush */
|
||
break;
|
||
|
||
default:
|
||
opcode = (opcode << 8) | ir.modrm;
|
||
goto no_support;
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case 0x0fc3: /* movnti */
|
||
ir.ot = (ir.dflag == 2) ? OT_QUAD : OT_LONG;
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
goto no_support;
|
||
ir.reg |= rex_r;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
break;
|
||
|
||
/* Add prefix to opcode. */
|
||
case 0x0f10:
|
||
case 0x0f11:
|
||
case 0x0f12:
|
||
case 0x0f13:
|
||
case 0x0f14:
|
||
case 0x0f15:
|
||
case 0x0f16:
|
||
case 0x0f17:
|
||
case 0x0f28:
|
||
case 0x0f29:
|
||
case 0x0f2a:
|
||
case 0x0f2b:
|
||
case 0x0f2c:
|
||
case 0x0f2d:
|
||
case 0x0f2e:
|
||
case 0x0f2f:
|
||
case 0x0f38:
|
||
case 0x0f39:
|
||
case 0x0f3a:
|
||
case 0x0f50:
|
||
case 0x0f51:
|
||
case 0x0f52:
|
||
case 0x0f53:
|
||
case 0x0f54:
|
||
case 0x0f55:
|
||
case 0x0f56:
|
||
case 0x0f57:
|
||
case 0x0f58:
|
||
case 0x0f59:
|
||
case 0x0f5a:
|
||
case 0x0f5b:
|
||
case 0x0f5c:
|
||
case 0x0f5d:
|
||
case 0x0f5e:
|
||
case 0x0f5f:
|
||
case 0x0f60:
|
||
case 0x0f61:
|
||
case 0x0f62:
|
||
case 0x0f63:
|
||
case 0x0f64:
|
||
case 0x0f65:
|
||
case 0x0f66:
|
||
case 0x0f67:
|
||
case 0x0f68:
|
||
case 0x0f69:
|
||
case 0x0f6a:
|
||
case 0x0f6b:
|
||
case 0x0f6c:
|
||
case 0x0f6d:
|
||
case 0x0f6e:
|
||
case 0x0f6f:
|
||
case 0x0f70:
|
||
case 0x0f71:
|
||
case 0x0f72:
|
||
case 0x0f73:
|
||
case 0x0f74:
|
||
case 0x0f75:
|
||
case 0x0f76:
|
||
case 0x0f7c:
|
||
case 0x0f7d:
|
||
case 0x0f7e:
|
||
case 0x0f7f:
|
||
case 0x0fb8:
|
||
case 0x0fc2:
|
||
case 0x0fc4:
|
||
case 0x0fc5:
|
||
case 0x0fc6:
|
||
case 0x0fd0:
|
||
case 0x0fd1:
|
||
case 0x0fd2:
|
||
case 0x0fd3:
|
||
case 0x0fd4:
|
||
case 0x0fd5:
|
||
case 0x0fd6:
|
||
case 0x0fd7:
|
||
case 0x0fd8:
|
||
case 0x0fd9:
|
||
case 0x0fda:
|
||
case 0x0fdb:
|
||
case 0x0fdc:
|
||
case 0x0fdd:
|
||
case 0x0fde:
|
||
case 0x0fdf:
|
||
case 0x0fe0:
|
||
case 0x0fe1:
|
||
case 0x0fe2:
|
||
case 0x0fe3:
|
||
case 0x0fe4:
|
||
case 0x0fe5:
|
||
case 0x0fe6:
|
||
case 0x0fe7:
|
||
case 0x0fe8:
|
||
case 0x0fe9:
|
||
case 0x0fea:
|
||
case 0x0feb:
|
||
case 0x0fec:
|
||
case 0x0fed:
|
||
case 0x0fee:
|
||
case 0x0fef:
|
||
case 0x0ff0:
|
||
case 0x0ff1:
|
||
case 0x0ff2:
|
||
case 0x0ff3:
|
||
case 0x0ff4:
|
||
case 0x0ff5:
|
||
case 0x0ff6:
|
||
case 0x0ff7:
|
||
case 0x0ff8:
|
||
case 0x0ff9:
|
||
case 0x0ffa:
|
||
case 0x0ffb:
|
||
case 0x0ffc:
|
||
case 0x0ffd:
|
||
case 0x0ffe:
|
||
/* Mask out PREFIX_ADDR. */
|
||
switch ((prefixes & ~PREFIX_ADDR))
|
||
{
|
||
case PREFIX_REPNZ:
|
||
opcode |= 0xf20000;
|
||
break;
|
||
case PREFIX_DATA:
|
||
opcode |= 0x660000;
|
||
break;
|
||
case PREFIX_REPZ:
|
||
opcode |= 0xf30000;
|
||
break;
|
||
}
|
||
reswitch_prefix_add:
|
||
switch (opcode)
|
||
{
|
||
case 0x0f38:
|
||
case 0x660f38:
|
||
case 0xf20f38:
|
||
case 0x0f3a:
|
||
case 0x660f3a:
|
||
if (record_read_memory (gdbarch, ir.addr, &opcode8, 1))
|
||
return -1;
|
||
ir.addr++;
|
||
opcode = (uint32_t) opcode8 | opcode << 8;
|
||
goto reswitch_prefix_add;
|
||
break;
|
||
|
||
case 0x0f10: /* movups */
|
||
case 0x660f10: /* movupd */
|
||
case 0xf30f10: /* movss */
|
||
case 0xf20f10: /* movsd */
|
||
case 0x0f12: /* movlps */
|
||
case 0x660f12: /* movlpd */
|
||
case 0xf30f12: /* movsldup */
|
||
case 0xf20f12: /* movddup */
|
||
case 0x0f14: /* unpcklps */
|
||
case 0x660f14: /* unpcklpd */
|
||
case 0x0f15: /* unpckhps */
|
||
case 0x660f15: /* unpckhpd */
|
||
case 0x0f16: /* movhps */
|
||
case 0x660f16: /* movhpd */
|
||
case 0xf30f16: /* movshdup */
|
||
case 0x0f28: /* movaps */
|
||
case 0x660f28: /* movapd */
|
||
case 0x0f2a: /* cvtpi2ps */
|
||
case 0x660f2a: /* cvtpi2pd */
|
||
case 0xf30f2a: /* cvtsi2ss */
|
||
case 0xf20f2a: /* cvtsi2sd */
|
||
case 0x0f2c: /* cvttps2pi */
|
||
case 0x660f2c: /* cvttpd2pi */
|
||
case 0x0f2d: /* cvtps2pi */
|
||
case 0x660f2d: /* cvtpd2pi */
|
||
case 0x660f3800: /* pshufb */
|
||
case 0x660f3801: /* phaddw */
|
||
case 0x660f3802: /* phaddd */
|
||
case 0x660f3803: /* phaddsw */
|
||
case 0x660f3804: /* pmaddubsw */
|
||
case 0x660f3805: /* phsubw */
|
||
case 0x660f3806: /* phsubd */
|
||
case 0x660f3807: /* phsubsw */
|
||
case 0x660f3808: /* psignb */
|
||
case 0x660f3809: /* psignw */
|
||
case 0x660f380a: /* psignd */
|
||
case 0x660f380b: /* pmulhrsw */
|
||
case 0x660f3810: /* pblendvb */
|
||
case 0x660f3814: /* blendvps */
|
||
case 0x660f3815: /* blendvpd */
|
||
case 0x660f381c: /* pabsb */
|
||
case 0x660f381d: /* pabsw */
|
||
case 0x660f381e: /* pabsd */
|
||
case 0x660f3820: /* pmovsxbw */
|
||
case 0x660f3821: /* pmovsxbd */
|
||
case 0x660f3822: /* pmovsxbq */
|
||
case 0x660f3823: /* pmovsxwd */
|
||
case 0x660f3824: /* pmovsxwq */
|
||
case 0x660f3825: /* pmovsxdq */
|
||
case 0x660f3828: /* pmuldq */
|
||
case 0x660f3829: /* pcmpeqq */
|
||
case 0x660f382a: /* movntdqa */
|
||
case 0x660f3a08: /* roundps */
|
||
case 0x660f3a09: /* roundpd */
|
||
case 0x660f3a0a: /* roundss */
|
||
case 0x660f3a0b: /* roundsd */
|
||
case 0x660f3a0c: /* blendps */
|
||
case 0x660f3a0d: /* blendpd */
|
||
case 0x660f3a0e: /* pblendw */
|
||
case 0x660f3a0f: /* palignr */
|
||
case 0x660f3a20: /* pinsrb */
|
||
case 0x660f3a21: /* insertps */
|
||
case 0x660f3a22: /* pinsrd pinsrq */
|
||
case 0x660f3a40: /* dpps */
|
||
case 0x660f3a41: /* dppd */
|
||
case 0x660f3a42: /* mpsadbw */
|
||
case 0x660f3a60: /* pcmpestrm */
|
||
case 0x660f3a61: /* pcmpestri */
|
||
case 0x660f3a62: /* pcmpistrm */
|
||
case 0x660f3a63: /* pcmpistri */
|
||
case 0x0f51: /* sqrtps */
|
||
case 0x660f51: /* sqrtpd */
|
||
case 0xf20f51: /* sqrtsd */
|
||
case 0xf30f51: /* sqrtss */
|
||
case 0x0f52: /* rsqrtps */
|
||
case 0xf30f52: /* rsqrtss */
|
||
case 0x0f53: /* rcpps */
|
||
case 0xf30f53: /* rcpss */
|
||
case 0x0f54: /* andps */
|
||
case 0x660f54: /* andpd */
|
||
case 0x0f55: /* andnps */
|
||
case 0x660f55: /* andnpd */
|
||
case 0x0f56: /* orps */
|
||
case 0x660f56: /* orpd */
|
||
case 0x0f57: /* xorps */
|
||
case 0x660f57: /* xorpd */
|
||
case 0x0f58: /* addps */
|
||
case 0x660f58: /* addpd */
|
||
case 0xf20f58: /* addsd */
|
||
case 0xf30f58: /* addss */
|
||
case 0x0f59: /* mulps */
|
||
case 0x660f59: /* mulpd */
|
||
case 0xf20f59: /* mulsd */
|
||
case 0xf30f59: /* mulss */
|
||
case 0x0f5a: /* cvtps2pd */
|
||
case 0x660f5a: /* cvtpd2ps */
|
||
case 0xf20f5a: /* cvtsd2ss */
|
||
case 0xf30f5a: /* cvtss2sd */
|
||
case 0x0f5b: /* cvtdq2ps */
|
||
case 0x660f5b: /* cvtps2dq */
|
||
case 0xf30f5b: /* cvttps2dq */
|
||
case 0x0f5c: /* subps */
|
||
case 0x660f5c: /* subpd */
|
||
case 0xf20f5c: /* subsd */
|
||
case 0xf30f5c: /* subss */
|
||
case 0x0f5d: /* minps */
|
||
case 0x660f5d: /* minpd */
|
||
case 0xf20f5d: /* minsd */
|
||
case 0xf30f5d: /* minss */
|
||
case 0x0f5e: /* divps */
|
||
case 0x660f5e: /* divpd */
|
||
case 0xf20f5e: /* divsd */
|
||
case 0xf30f5e: /* divss */
|
||
case 0x0f5f: /* maxps */
|
||
case 0x660f5f: /* maxpd */
|
||
case 0xf20f5f: /* maxsd */
|
||
case 0xf30f5f: /* maxss */
|
||
case 0x660f60: /* punpcklbw */
|
||
case 0x660f61: /* punpcklwd */
|
||
case 0x660f62: /* punpckldq */
|
||
case 0x660f63: /* packsswb */
|
||
case 0x660f64: /* pcmpgtb */
|
||
case 0x660f65: /* pcmpgtw */
|
||
case 0x660f66: /* pcmpgtd */
|
||
case 0x660f67: /* packuswb */
|
||
case 0x660f68: /* punpckhbw */
|
||
case 0x660f69: /* punpckhwd */
|
||
case 0x660f6a: /* punpckhdq */
|
||
case 0x660f6b: /* packssdw */
|
||
case 0x660f6c: /* punpcklqdq */
|
||
case 0x660f6d: /* punpckhqdq */
|
||
case 0x660f6e: /* movd */
|
||
case 0x660f6f: /* movdqa */
|
||
case 0xf30f6f: /* movdqu */
|
||
case 0x660f70: /* pshufd */
|
||
case 0xf20f70: /* pshuflw */
|
||
case 0xf30f70: /* pshufhw */
|
||
case 0x660f74: /* pcmpeqb */
|
||
case 0x660f75: /* pcmpeqw */
|
||
case 0x660f76: /* pcmpeqd */
|
||
case 0x660f7c: /* haddpd */
|
||
case 0xf20f7c: /* haddps */
|
||
case 0x660f7d: /* hsubpd */
|
||
case 0xf20f7d: /* hsubps */
|
||
case 0xf30f7e: /* movq */
|
||
case 0x0fc2: /* cmpps */
|
||
case 0x660fc2: /* cmppd */
|
||
case 0xf20fc2: /* cmpsd */
|
||
case 0xf30fc2: /* cmpss */
|
||
case 0x660fc4: /* pinsrw */
|
||
case 0x0fc6: /* shufps */
|
||
case 0x660fc6: /* shufpd */
|
||
case 0x660fd0: /* addsubpd */
|
||
case 0xf20fd0: /* addsubps */
|
||
case 0x660fd1: /* psrlw */
|
||
case 0x660fd2: /* psrld */
|
||
case 0x660fd3: /* psrlq */
|
||
case 0x660fd4: /* paddq */
|
||
case 0x660fd5: /* pmullw */
|
||
case 0xf30fd6: /* movq2dq */
|
||
case 0x660fd8: /* psubusb */
|
||
case 0x660fd9: /* psubusw */
|
||
case 0x660fda: /* pminub */
|
||
case 0x660fdb: /* pand */
|
||
case 0x660fdc: /* paddusb */
|
||
case 0x660fdd: /* paddusw */
|
||
case 0x660fde: /* pmaxub */
|
||
case 0x660fdf: /* pandn */
|
||
case 0x660fe0: /* pavgb */
|
||
case 0x660fe1: /* psraw */
|
||
case 0x660fe2: /* psrad */
|
||
case 0x660fe3: /* pavgw */
|
||
case 0x660fe4: /* pmulhuw */
|
||
case 0x660fe5: /* pmulhw */
|
||
case 0x660fe6: /* cvttpd2dq */
|
||
case 0xf20fe6: /* cvtpd2dq */
|
||
case 0xf30fe6: /* cvtdq2pd */
|
||
case 0x660fe8: /* psubsb */
|
||
case 0x660fe9: /* psubsw */
|
||
case 0x660fea: /* pminsw */
|
||
case 0x660feb: /* por */
|
||
case 0x660fec: /* paddsb */
|
||
case 0x660fed: /* paddsw */
|
||
case 0x660fee: /* pmaxsw */
|
||
case 0x660fef: /* pxor */
|
||
case 0xf20ff0: /* lddqu */
|
||
case 0x660ff1: /* psllw */
|
||
case 0x660ff2: /* pslld */
|
||
case 0x660ff3: /* psllq */
|
||
case 0x660ff4: /* pmuludq */
|
||
case 0x660ff5: /* pmaddwd */
|
||
case 0x660ff6: /* psadbw */
|
||
case 0x660ff8: /* psubb */
|
||
case 0x660ff9: /* psubw */
|
||
case 0x660ffa: /* psubd */
|
||
case 0x660ffb: /* psubq */
|
||
case 0x660ffc: /* paddb */
|
||
case 0x660ffd: /* paddw */
|
||
case 0x660ffe: /* paddd */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
ir.reg |= rex_r;
|
||
if (!i386_xmm_regnum_p (gdbarch, I387_XMM0_REGNUM (tdep) + ir.reg))
|
||
goto no_support;
|
||
record_full_arch_list_add_reg (ir.regcache,
|
||
I387_XMM0_REGNUM (tdep) + ir.reg);
|
||
if ((opcode & 0xfffffffc) == 0x660f3a60)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0f11: /* movups */
|
||
case 0x660f11: /* movupd */
|
||
case 0xf30f11: /* movss */
|
||
case 0xf20f11: /* movsd */
|
||
case 0x0f13: /* movlps */
|
||
case 0x660f13: /* movlpd */
|
||
case 0x0f17: /* movhps */
|
||
case 0x660f17: /* movhpd */
|
||
case 0x0f29: /* movaps */
|
||
case 0x660f29: /* movapd */
|
||
case 0x660f3a14: /* pextrb */
|
||
case 0x660f3a15: /* pextrw */
|
||
case 0x660f3a16: /* pextrd pextrq */
|
||
case 0x660f3a17: /* extractps */
|
||
case 0x660f7f: /* movdqa */
|
||
case 0xf30f7f: /* movdqu */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
{
|
||
if (opcode == 0x0f13 || opcode == 0x660f13
|
||
|| opcode == 0x0f17 || opcode == 0x660f17)
|
||
goto no_support;
|
||
ir.rm |= ir.rex_b;
|
||
if (!i386_xmm_regnum_p (gdbarch,
|
||
I387_XMM0_REGNUM (tdep) + ir.rm))
|
||
goto no_support;
|
||
record_full_arch_list_add_reg (ir.regcache,
|
||
I387_XMM0_REGNUM (tdep) + ir.rm);
|
||
}
|
||
else
|
||
{
|
||
switch (opcode)
|
||
{
|
||
case 0x660f3a14:
|
||
ir.ot = OT_BYTE;
|
||
break;
|
||
case 0x660f3a15:
|
||
ir.ot = OT_WORD;
|
||
break;
|
||
case 0x660f3a16:
|
||
ir.ot = OT_LONG;
|
||
break;
|
||
case 0x660f3a17:
|
||
ir.ot = OT_QUAD;
|
||
break;
|
||
default:
|
||
ir.ot = OT_DQUAD;
|
||
break;
|
||
}
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
break;
|
||
|
||
case 0x0f2b: /* movntps */
|
||
case 0x660f2b: /* movntpd */
|
||
case 0x0fe7: /* movntq */
|
||
case 0x660fe7: /* movntdq */
|
||
if (ir.mod == 3)
|
||
goto no_support;
|
||
if (opcode == 0x0fe7)
|
||
ir.ot = OT_QUAD;
|
||
else
|
||
ir.ot = OT_DQUAD;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
break;
|
||
|
||
case 0xf30f2c: /* cvttss2si */
|
||
case 0xf20f2c: /* cvttsd2si */
|
||
case 0xf30f2d: /* cvtss2si */
|
||
case 0xf20f2d: /* cvtsd2si */
|
||
case 0xf20f38f0: /* crc32 */
|
||
case 0xf20f38f1: /* crc32 */
|
||
case 0x0f50: /* movmskps */
|
||
case 0x660f50: /* movmskpd */
|
||
case 0x0fc5: /* pextrw */
|
||
case 0x660fc5: /* pextrw */
|
||
case 0x0fd7: /* pmovmskb */
|
||
case 0x660fd7: /* pmovmskb */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg | rex_r);
|
||
break;
|
||
|
||
case 0x0f3800: /* pshufb */
|
||
case 0x0f3801: /* phaddw */
|
||
case 0x0f3802: /* phaddd */
|
||
case 0x0f3803: /* phaddsw */
|
||
case 0x0f3804: /* pmaddubsw */
|
||
case 0x0f3805: /* phsubw */
|
||
case 0x0f3806: /* phsubd */
|
||
case 0x0f3807: /* phsubsw */
|
||
case 0x0f3808: /* psignb */
|
||
case 0x0f3809: /* psignw */
|
||
case 0x0f380a: /* psignd */
|
||
case 0x0f380b: /* pmulhrsw */
|
||
case 0x0f381c: /* pabsb */
|
||
case 0x0f381d: /* pabsw */
|
||
case 0x0f381e: /* pabsd */
|
||
case 0x0f382b: /* packusdw */
|
||
case 0x0f3830: /* pmovzxbw */
|
||
case 0x0f3831: /* pmovzxbd */
|
||
case 0x0f3832: /* pmovzxbq */
|
||
case 0x0f3833: /* pmovzxwd */
|
||
case 0x0f3834: /* pmovzxwq */
|
||
case 0x0f3835: /* pmovzxdq */
|
||
case 0x0f3837: /* pcmpgtq */
|
||
case 0x0f3838: /* pminsb */
|
||
case 0x0f3839: /* pminsd */
|
||
case 0x0f383a: /* pminuw */
|
||
case 0x0f383b: /* pminud */
|
||
case 0x0f383c: /* pmaxsb */
|
||
case 0x0f383d: /* pmaxsd */
|
||
case 0x0f383e: /* pmaxuw */
|
||
case 0x0f383f: /* pmaxud */
|
||
case 0x0f3840: /* pmulld */
|
||
case 0x0f3841: /* phminposuw */
|
||
case 0x0f3a0f: /* palignr */
|
||
case 0x0f60: /* punpcklbw */
|
||
case 0x0f61: /* punpcklwd */
|
||
case 0x0f62: /* punpckldq */
|
||
case 0x0f63: /* packsswb */
|
||
case 0x0f64: /* pcmpgtb */
|
||
case 0x0f65: /* pcmpgtw */
|
||
case 0x0f66: /* pcmpgtd */
|
||
case 0x0f67: /* packuswb */
|
||
case 0x0f68: /* punpckhbw */
|
||
case 0x0f69: /* punpckhwd */
|
||
case 0x0f6a: /* punpckhdq */
|
||
case 0x0f6b: /* packssdw */
|
||
case 0x0f6e: /* movd */
|
||
case 0x0f6f: /* movq */
|
||
case 0x0f70: /* pshufw */
|
||
case 0x0f74: /* pcmpeqb */
|
||
case 0x0f75: /* pcmpeqw */
|
||
case 0x0f76: /* pcmpeqd */
|
||
case 0x0fc4: /* pinsrw */
|
||
case 0x0fd1: /* psrlw */
|
||
case 0x0fd2: /* psrld */
|
||
case 0x0fd3: /* psrlq */
|
||
case 0x0fd4: /* paddq */
|
||
case 0x0fd5: /* pmullw */
|
||
case 0xf20fd6: /* movdq2q */
|
||
case 0x0fd8: /* psubusb */
|
||
case 0x0fd9: /* psubusw */
|
||
case 0x0fda: /* pminub */
|
||
case 0x0fdb: /* pand */
|
||
case 0x0fdc: /* paddusb */
|
||
case 0x0fdd: /* paddusw */
|
||
case 0x0fde: /* pmaxub */
|
||
case 0x0fdf: /* pandn */
|
||
case 0x0fe0: /* pavgb */
|
||
case 0x0fe1: /* psraw */
|
||
case 0x0fe2: /* psrad */
|
||
case 0x0fe3: /* pavgw */
|
||
case 0x0fe4: /* pmulhuw */
|
||
case 0x0fe5: /* pmulhw */
|
||
case 0x0fe8: /* psubsb */
|
||
case 0x0fe9: /* psubsw */
|
||
case 0x0fea: /* pminsw */
|
||
case 0x0feb: /* por */
|
||
case 0x0fec: /* paddsb */
|
||
case 0x0fed: /* paddsw */
|
||
case 0x0fee: /* pmaxsw */
|
||
case 0x0fef: /* pxor */
|
||
case 0x0ff1: /* psllw */
|
||
case 0x0ff2: /* pslld */
|
||
case 0x0ff3: /* psllq */
|
||
case 0x0ff4: /* pmuludq */
|
||
case 0x0ff5: /* pmaddwd */
|
||
case 0x0ff6: /* psadbw */
|
||
case 0x0ff8: /* psubb */
|
||
case 0x0ff9: /* psubw */
|
||
case 0x0ffa: /* psubd */
|
||
case 0x0ffb: /* psubq */
|
||
case 0x0ffc: /* paddb */
|
||
case 0x0ffd: /* paddw */
|
||
case 0x0ffe: /* paddd */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (!i386_mmx_regnum_p (gdbarch, I387_MM0_REGNUM (tdep) + ir.reg))
|
||
goto no_support;
|
||
record_full_arch_list_add_reg (ir.regcache,
|
||
I387_MM0_REGNUM (tdep) + ir.reg);
|
||
break;
|
||
|
||
case 0x0f71: /* psllw */
|
||
case 0x0f72: /* pslld */
|
||
case 0x0f73: /* psllq */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (!i386_mmx_regnum_p (gdbarch, I387_MM0_REGNUM (tdep) + ir.rm))
|
||
goto no_support;
|
||
record_full_arch_list_add_reg (ir.regcache,
|
||
I387_MM0_REGNUM (tdep) + ir.rm);
|
||
break;
|
||
|
||
case 0x660f71: /* psllw */
|
||
case 0x660f72: /* pslld */
|
||
case 0x660f73: /* psllq */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
ir.rm |= ir.rex_b;
|
||
if (!i386_xmm_regnum_p (gdbarch, I387_XMM0_REGNUM (tdep) + ir.rm))
|
||
goto no_support;
|
||
record_full_arch_list_add_reg (ir.regcache,
|
||
I387_XMM0_REGNUM (tdep) + ir.rm);
|
||
break;
|
||
|
||
case 0x0f7e: /* movd */
|
||
case 0x660f7e: /* movd */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.rm | ir.rex_b);
|
||
else
|
||
{
|
||
if (ir.dflag == 2)
|
||
ir.ot = OT_QUAD;
|
||
else
|
||
ir.ot = OT_LONG;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
break;
|
||
|
||
case 0x0f7f: /* movq */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
{
|
||
if (!i386_mmx_regnum_p (gdbarch, I387_MM0_REGNUM (tdep) + ir.rm))
|
||
goto no_support;
|
||
record_full_arch_list_add_reg (ir.regcache,
|
||
I387_MM0_REGNUM (tdep) + ir.rm);
|
||
}
|
||
else
|
||
{
|
||
ir.ot = OT_QUAD;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
break;
|
||
|
||
case 0xf30fb8: /* popcnt */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (ir.reg);
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x660fd6: /* movq */
|
||
if (i386_record_modrm (&ir))
|
||
return -1;
|
||
if (ir.mod == 3)
|
||
{
|
||
ir.rm |= ir.rex_b;
|
||
if (!i386_xmm_regnum_p (gdbarch,
|
||
I387_XMM0_REGNUM (tdep) + ir.rm))
|
||
goto no_support;
|
||
record_full_arch_list_add_reg (ir.regcache,
|
||
I387_XMM0_REGNUM (tdep) + ir.rm);
|
||
}
|
||
else
|
||
{
|
||
ir.ot = OT_QUAD;
|
||
if (i386_record_lea_modrm (&ir))
|
||
return -1;
|
||
}
|
||
break;
|
||
|
||
case 0x660f3817: /* ptest */
|
||
case 0x0f2e: /* ucomiss */
|
||
case 0x660f2e: /* ucomisd */
|
||
case 0x0f2f: /* comiss */
|
||
case 0x660f2f: /* comisd */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
|
||
break;
|
||
|
||
case 0x0ff7: /* maskmovq */
|
||
regcache_raw_read_unsigned (ir.regcache,
|
||
ir.regmap[X86_RECORD_REDI_REGNUM],
|
||
&addr);
|
||
if (record_full_arch_list_add_mem (addr, 64))
|
||
return -1;
|
||
break;
|
||
|
||
case 0x660ff7: /* maskmovdqu */
|
||
regcache_raw_read_unsigned (ir.regcache,
|
||
ir.regmap[X86_RECORD_REDI_REGNUM],
|
||
&addr);
|
||
if (record_full_arch_list_add_mem (addr, 128))
|
||
return -1;
|
||
break;
|
||
|
||
default:
|
||
goto no_support;
|
||
break;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
goto no_support;
|
||
break;
|
||
}
|
||
|
||
/* In the future, maybe still need to deal with need_dasm. */
|
||
I386_RECORD_FULL_ARCH_LIST_ADD_REG (X86_RECORD_REIP_REGNUM);
|
||
if (record_full_arch_list_add_end ())
|
||
return -1;
|
||
|
||
return 0;
|
||
|
||
no_support:
|
||
printf_unfiltered (_("Process record does not support instruction 0x%02x "
|
||
"at address %s.\n"),
|
||
(unsigned int) (opcode),
|
||
paddress (gdbarch, ir.orig_addr));
|
||
return -1;
|
||
}
|
||
|
||
static const int i386_record_regmap[] =
|
||
{
|
||
I386_EAX_REGNUM, I386_ECX_REGNUM, I386_EDX_REGNUM, I386_EBX_REGNUM,
|
||
I386_ESP_REGNUM, I386_EBP_REGNUM, I386_ESI_REGNUM, I386_EDI_REGNUM,
|
||
0, 0, 0, 0, 0, 0, 0, 0,
|
||
I386_EIP_REGNUM, I386_EFLAGS_REGNUM, I386_CS_REGNUM, I386_SS_REGNUM,
|
||
I386_DS_REGNUM, I386_ES_REGNUM, I386_FS_REGNUM, I386_GS_REGNUM
|
||
};
|
||
|
||
/* Check that the given address appears suitable for a fast
|
||
tracepoint, which on x86-64 means that we need an instruction of at
|
||
least 5 bytes, so that we can overwrite it with a 4-byte-offset
|
||
jump and not have to worry about program jumps to an address in the
|
||
middle of the tracepoint jump. On x86, it may be possible to use
|
||
4-byte jumps with a 2-byte offset to a trampoline located in the
|
||
bottom 64 KiB of memory. Returns 1 if OK, and writes a size
|
||
of instruction to replace, and 0 if not, plus an explanatory
|
||
string. */
|
||
|
||
static int
|
||
i386_fast_tracepoint_valid_at (struct gdbarch *gdbarch,
|
||
CORE_ADDR addr, int *isize, char **msg)
|
||
{
|
||
int len, jumplen;
|
||
static struct ui_file *gdb_null = NULL;
|
||
|
||
/* Ask the target for the minimum instruction length supported. */
|
||
jumplen = target_get_min_fast_tracepoint_insn_len ();
|
||
|
||
if (jumplen < 0)
|
||
{
|
||
/* If the target does not support the get_min_fast_tracepoint_insn_len
|
||
operation, assume that fast tracepoints will always be implemented
|
||
using 4-byte relative jumps on both x86 and x86-64. */
|
||
jumplen = 5;
|
||
}
|
||
else if (jumplen == 0)
|
||
{
|
||
/* If the target does support get_min_fast_tracepoint_insn_len but
|
||
returns zero, then the IPA has not loaded yet. In this case,
|
||
we optimistically assume that truncated 2-byte relative jumps
|
||
will be available on x86, and compensate later if this assumption
|
||
turns out to be incorrect. On x86-64 architectures, 4-byte relative
|
||
jumps will always be used. */
|
||
jumplen = (register_size (gdbarch, 0) == 8) ? 5 : 4;
|
||
}
|
||
|
||
/* Dummy file descriptor for the disassembler. */
|
||
if (!gdb_null)
|
||
gdb_null = ui_file_new ();
|
||
|
||
/* Check for fit. */
|
||
len = gdb_print_insn (gdbarch, addr, gdb_null, NULL);
|
||
if (isize)
|
||
*isize = len;
|
||
|
||
if (len < jumplen)
|
||
{
|
||
/* Return a bit of target-specific detail to add to the caller's
|
||
generic failure message. */
|
||
if (msg)
|
||
*msg = xstrprintf (_("; instruction is only %d bytes long, "
|
||
"need at least %d bytes for the jump"),
|
||
len, jumplen);
|
||
return 0;
|
||
}
|
||
else
|
||
{
|
||
if (msg)
|
||
*msg = NULL;
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
static int
|
||
i386_validate_tdesc_p (struct gdbarch_tdep *tdep,
|
||
struct tdesc_arch_data *tdesc_data)
|
||
{
|
||
const struct target_desc *tdesc = tdep->tdesc;
|
||
const struct tdesc_feature *feature_core;
|
||
const struct tdesc_feature *feature_sse, *feature_avx, *feature_mpx;
|
||
int i, num_regs, valid_p;
|
||
|
||
if (! tdesc_has_registers (tdesc))
|
||
return 0;
|
||
|
||
/* Get core registers. */
|
||
feature_core = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.core");
|
||
if (feature_core == NULL)
|
||
return 0;
|
||
|
||
/* Get SSE registers. */
|
||
feature_sse = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.sse");
|
||
|
||
/* Try AVX registers. */
|
||
feature_avx = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.avx");
|
||
|
||
/* Try MPX registers. */
|
||
feature_mpx = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.mpx");
|
||
|
||
valid_p = 1;
|
||
|
||
/* The XCR0 bits. */
|
||
if (feature_avx)
|
||
{
|
||
/* AVX register description requires SSE register description. */
|
||
if (!feature_sse)
|
||
return 0;
|
||
|
||
tdep->xcr0 = I386_XSTATE_AVX_MASK;
|
||
|
||
/* It may have been set by OSABI initialization function. */
|
||
if (tdep->num_ymm_regs == 0)
|
||
{
|
||
tdep->ymmh_register_names = i386_ymmh_names;
|
||
tdep->num_ymm_regs = 8;
|
||
tdep->ymm0h_regnum = I386_YMM0H_REGNUM;
|
||
}
|
||
|
||
for (i = 0; i < tdep->num_ymm_regs; i++)
|
||
valid_p &= tdesc_numbered_register (feature_avx, tdesc_data,
|
||
tdep->ymm0h_regnum + i,
|
||
tdep->ymmh_register_names[i]);
|
||
}
|
||
else if (feature_sse)
|
||
tdep->xcr0 = I386_XSTATE_SSE_MASK;
|
||
else
|
||
{
|
||
tdep->xcr0 = I386_XSTATE_X87_MASK;
|
||
tdep->num_xmm_regs = 0;
|
||
}
|
||
|
||
num_regs = tdep->num_core_regs;
|
||
for (i = 0; i < num_regs; i++)
|
||
valid_p &= tdesc_numbered_register (feature_core, tdesc_data, i,
|
||
tdep->register_names[i]);
|
||
|
||
if (feature_sse)
|
||
{
|
||
/* Need to include %mxcsr, so add one. */
|
||
num_regs += tdep->num_xmm_regs + 1;
|
||
for (; i < num_regs; i++)
|
||
valid_p &= tdesc_numbered_register (feature_sse, tdesc_data, i,
|
||
tdep->register_names[i]);
|
||
}
|
||
|
||
if (feature_mpx)
|
||
{
|
||
tdep->xcr0 = I386_XSTATE_MPX_MASK;
|
||
|
||
if (tdep->bnd0r_regnum < 0)
|
||
{
|
||
tdep->mpx_register_names = i386_mpx_names;
|
||
tdep->bnd0r_regnum = I386_BND0R_REGNUM;
|
||
tdep->bndcfgu_regnum = I386_BNDCFGU_REGNUM;
|
||
}
|
||
|
||
for (i = 0; i < I387_NUM_MPX_REGS; i++)
|
||
valid_p &= tdesc_numbered_register (feature_mpx, tdesc_data,
|
||
I387_BND0R_REGNUM (tdep) + i,
|
||
tdep->mpx_register_names[i]);
|
||
}
|
||
|
||
return valid_p;
|
||
}
|
||
|
||
|
||
static struct gdbarch *
|
||
i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
||
{
|
||
struct gdbarch_tdep *tdep;
|
||
struct gdbarch *gdbarch;
|
||
struct tdesc_arch_data *tdesc_data;
|
||
const struct target_desc *tdesc;
|
||
int mm0_regnum;
|
||
int ymm0_regnum;
|
||
int bnd0_regnum;
|
||
int num_bnd_cooked;
|
||
|
||
/* If there is already a candidate, use it. */
|
||
arches = gdbarch_list_lookup_by_info (arches, &info);
|
||
if (arches != NULL)
|
||
return arches->gdbarch;
|
||
|
||
/* Allocate space for the new architecture. */
|
||
tdep = XCNEW (struct gdbarch_tdep);
|
||
gdbarch = gdbarch_alloc (&info, tdep);
|
||
|
||
/* General-purpose registers. */
|
||
tdep->gregset = NULL;
|
||
tdep->gregset_reg_offset = NULL;
|
||
tdep->gregset_num_regs = I386_NUM_GREGS;
|
||
tdep->sizeof_gregset = 0;
|
||
|
||
/* Floating-point registers. */
|
||
tdep->fpregset = NULL;
|
||
tdep->sizeof_fpregset = I387_SIZEOF_FSAVE;
|
||
|
||
tdep->xstateregset = NULL;
|
||
|
||
/* The default settings include the FPU registers, the MMX registers
|
||
and the SSE registers. This can be overridden for a specific ABI
|
||
by adjusting the members `st0_regnum', `mm0_regnum' and
|
||
`num_xmm_regs' of `struct gdbarch_tdep', otherwise the registers
|
||
will show up in the output of "info all-registers". */
|
||
|
||
tdep->st0_regnum = I386_ST0_REGNUM;
|
||
|
||
/* I386_NUM_XREGS includes %mxcsr, so substract one. */
|
||
tdep->num_xmm_regs = I386_NUM_XREGS - 1;
|
||
|
||
tdep->jb_pc_offset = -1;
|
||
tdep->struct_return = pcc_struct_return;
|
||
tdep->sigtramp_start = 0;
|
||
tdep->sigtramp_end = 0;
|
||
tdep->sigtramp_p = i386_sigtramp_p;
|
||
tdep->sigcontext_addr = NULL;
|
||
tdep->sc_reg_offset = NULL;
|
||
tdep->sc_pc_offset = -1;
|
||
tdep->sc_sp_offset = -1;
|
||
|
||
tdep->xsave_xcr0_offset = -1;
|
||
|
||
tdep->record_regmap = i386_record_regmap;
|
||
|
||
set_gdbarch_long_long_align_bit (gdbarch, 32);
|
||
|
||
/* The format used for `long double' on almost all i386 targets is
|
||
the i387 extended floating-point format. In fact, of all targets
|
||
in the GCC 2.95 tree, only OSF/1 does it different, and insists
|
||
on having a `long double' that's not `long' at all. */
|
||
set_gdbarch_long_double_format (gdbarch, floatformats_i387_ext);
|
||
|
||
/* Although the i387 extended floating-point has only 80 significant
|
||
bits, a `long double' actually takes up 96, probably to enforce
|
||
alignment. */
|
||
set_gdbarch_long_double_bit (gdbarch, 96);
|
||
|
||
/* Register numbers of various important registers. */
|
||
set_gdbarch_sp_regnum (gdbarch, I386_ESP_REGNUM); /* %esp */
|
||
set_gdbarch_pc_regnum (gdbarch, I386_EIP_REGNUM); /* %eip */
|
||
set_gdbarch_ps_regnum (gdbarch, I386_EFLAGS_REGNUM); /* %eflags */
|
||
set_gdbarch_fp0_regnum (gdbarch, I386_ST0_REGNUM); /* %st(0) */
|
||
|
||
/* NOTE: kettenis/20040418: GCC does have two possible register
|
||
numbering schemes on the i386: dbx and SVR4. These schemes
|
||
differ in how they number %ebp, %esp, %eflags, and the
|
||
floating-point registers, and are implemented by the arrays
|
||
dbx_register_map[] and svr4_dbx_register_map in
|
||
gcc/config/i386.c. GCC also defines a third numbering scheme in
|
||
gcc/config/i386.c, which it designates as the "default" register
|
||
map used in 64bit mode. This last register numbering scheme is
|
||
implemented in dbx64_register_map, and is used for AMD64; see
|
||
amd64-tdep.c.
|
||
|
||
Currently, each GCC i386 target always uses the same register
|
||
numbering scheme across all its supported debugging formats
|
||
i.e. SDB (COFF), stabs and DWARF 2. This is because
|
||
gcc/sdbout.c, gcc/dbxout.c and gcc/dwarf2out.c all use the
|
||
DBX_REGISTER_NUMBER macro which is defined by each target's
|
||
respective config header in a manner independent of the requested
|
||
output debugging format.
|
||
|
||
This does not match the arrangement below, which presumes that
|
||
the SDB and stabs numbering schemes differ from the DWARF and
|
||
DWARF 2 ones. The reason for this arrangement is that it is
|
||
likely to get the numbering scheme for the target's
|
||
default/native debug format right. For targets where GCC is the
|
||
native compiler (FreeBSD, NetBSD, OpenBSD, GNU/Linux) or for
|
||
targets where the native toolchain uses a different numbering
|
||
scheme for a particular debug format (stabs-in-ELF on Solaris)
|
||
the defaults below will have to be overridden, like
|
||
i386_elf_init_abi() does. */
|
||
|
||
/* Use the dbx register numbering scheme for stabs and COFF. */
|
||
set_gdbarch_stab_reg_to_regnum (gdbarch, i386_dbx_reg_to_regnum);
|
||
set_gdbarch_sdb_reg_to_regnum (gdbarch, i386_dbx_reg_to_regnum);
|
||
|
||
/* Use the SVR4 register numbering scheme for DWARF 2. */
|
||
set_gdbarch_dwarf2_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum);
|
||
|
||
/* We don't set gdbarch_stab_reg_to_regnum, since ECOFF doesn't seem to
|
||
be in use on any of the supported i386 targets. */
|
||
|
||
set_gdbarch_print_float_info (gdbarch, i387_print_float_info);
|
||
|
||
set_gdbarch_get_longjmp_target (gdbarch, i386_get_longjmp_target);
|
||
|
||
/* Call dummy code. */
|
||
set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
|
||
set_gdbarch_push_dummy_code (gdbarch, i386_push_dummy_code);
|
||
set_gdbarch_push_dummy_call (gdbarch, i386_push_dummy_call);
|
||
set_gdbarch_frame_align (gdbarch, i386_frame_align);
|
||
|
||
set_gdbarch_convert_register_p (gdbarch, i386_convert_register_p);
|
||
set_gdbarch_register_to_value (gdbarch, i386_register_to_value);
|
||
set_gdbarch_value_to_register (gdbarch, i386_value_to_register);
|
||
|
||
set_gdbarch_return_value (gdbarch, i386_return_value);
|
||
|
||
set_gdbarch_skip_prologue (gdbarch, i386_skip_prologue);
|
||
|
||
/* Stack grows downward. */
|
||
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
|
||
|
||
set_gdbarch_breakpoint_from_pc (gdbarch, i386_breakpoint_from_pc);
|
||
set_gdbarch_decr_pc_after_break (gdbarch, 1);
|
||
set_gdbarch_max_insn_length (gdbarch, I386_MAX_INSN_LEN);
|
||
|
||
set_gdbarch_frame_args_skip (gdbarch, 8);
|
||
|
||
set_gdbarch_print_insn (gdbarch, i386_print_insn);
|
||
|
||
set_gdbarch_dummy_id (gdbarch, i386_dummy_id);
|
||
|
||
set_gdbarch_unwind_pc (gdbarch, i386_unwind_pc);
|
||
|
||
/* Add the i386 register groups. */
|
||
i386_add_reggroups (gdbarch);
|
||
tdep->register_reggroup_p = i386_register_reggroup_p;
|
||
|
||
/* Helper for function argument information. */
|
||
set_gdbarch_fetch_pointer_argument (gdbarch, i386_fetch_pointer_argument);
|
||
|
||
/* Hook the function epilogue frame unwinder. This unwinder is
|
||
appended to the list first, so that it supercedes the DWARF
|
||
unwinder in function epilogues (where the DWARF unwinder
|
||
currently fails). */
|
||
frame_unwind_append_unwinder (gdbarch, &i386_epilogue_frame_unwind);
|
||
|
||
/* Hook in the DWARF CFI frame unwinder. This unwinder is appended
|
||
to the list before the prologue-based unwinders, so that DWARF
|
||
CFI info will be used if it is available. */
|
||
dwarf2_append_unwinders (gdbarch);
|
||
|
||
frame_base_set_default (gdbarch, &i386_frame_base);
|
||
|
||
/* Pseudo registers may be changed by amd64_init_abi. */
|
||
set_gdbarch_pseudo_register_read_value (gdbarch,
|
||
i386_pseudo_register_read_value);
|
||
set_gdbarch_pseudo_register_write (gdbarch, i386_pseudo_register_write);
|
||
|
||
set_tdesc_pseudo_register_type (gdbarch, i386_pseudo_register_type);
|
||
set_tdesc_pseudo_register_name (gdbarch, i386_pseudo_register_name);
|
||
|
||
/* Override the normal target description method to make the AVX
|
||
upper halves anonymous. */
|
||
set_gdbarch_register_name (gdbarch, i386_register_name);
|
||
|
||
/* Even though the default ABI only includes general-purpose registers,
|
||
floating-point registers and the SSE registers, we have to leave a
|
||
gap for the upper AVX registers and the MPX registers. */
|
||
set_gdbarch_num_regs (gdbarch, I386_MPX_NUM_REGS);
|
||
|
||
/* Get the x86 target description from INFO. */
|
||
tdesc = info.target_desc;
|
||
if (! tdesc_has_registers (tdesc))
|
||
tdesc = tdesc_i386;
|
||
tdep->tdesc = tdesc;
|
||
|
||
tdep->num_core_regs = I386_NUM_GREGS + I387_NUM_REGS;
|
||
tdep->register_names = i386_register_names;
|
||
|
||
/* No upper YMM registers. */
|
||
tdep->ymmh_register_names = NULL;
|
||
tdep->ymm0h_regnum = -1;
|
||
|
||
tdep->num_byte_regs = 8;
|
||
tdep->num_word_regs = 8;
|
||
tdep->num_dword_regs = 0;
|
||
tdep->num_mmx_regs = 8;
|
||
tdep->num_ymm_regs = 0;
|
||
|
||
/* No MPX registers. */
|
||
tdep->bnd0r_regnum = -1;
|
||
tdep->bndcfgu_regnum = -1;
|
||
|
||
tdesc_data = tdesc_data_alloc ();
|
||
|
||
set_gdbarch_relocate_instruction (gdbarch, i386_relocate_instruction);
|
||
|
||
set_gdbarch_gen_return_address (gdbarch, i386_gen_return_address);
|
||
|
||
set_gdbarch_insn_is_call (gdbarch, i386_insn_is_call);
|
||
set_gdbarch_insn_is_ret (gdbarch, i386_insn_is_ret);
|
||
set_gdbarch_insn_is_jump (gdbarch, i386_insn_is_jump);
|
||
|
||
/* Hook in ABI-specific overrides, if they have been registered. */
|
||
info.tdep_info = (void *) tdesc_data;
|
||
gdbarch_init_osabi (info, gdbarch);
|
||
|
||
if (!i386_validate_tdesc_p (tdep, tdesc_data))
|
||
{
|
||
tdesc_data_cleanup (tdesc_data);
|
||
xfree (tdep);
|
||
gdbarch_free (gdbarch);
|
||
return NULL;
|
||
}
|
||
|
||
num_bnd_cooked = (tdep->bnd0r_regnum > 0 ? I387_NUM_BND_REGS : 0);
|
||
|
||
/* Wire in pseudo registers. Number of pseudo registers may be
|
||
changed. */
|
||
set_gdbarch_num_pseudo_regs (gdbarch, (tdep->num_byte_regs
|
||
+ tdep->num_word_regs
|
||
+ tdep->num_dword_regs
|
||
+ tdep->num_mmx_regs
|
||
+ tdep->num_ymm_regs
|
||
+ num_bnd_cooked));
|
||
|
||
/* Target description may be changed. */
|
||
tdesc = tdep->tdesc;
|
||
|
||
tdesc_use_registers (gdbarch, tdesc, tdesc_data);
|
||
|
||
/* Override gdbarch_register_reggroup_p set in tdesc_use_registers. */
|
||
set_gdbarch_register_reggroup_p (gdbarch, tdep->register_reggroup_p);
|
||
|
||
/* Make %al the first pseudo-register. */
|
||
tdep->al_regnum = gdbarch_num_regs (gdbarch);
|
||
tdep->ax_regnum = tdep->al_regnum + tdep->num_byte_regs;
|
||
|
||
ymm0_regnum = tdep->ax_regnum + tdep->num_word_regs;
|
||
if (tdep->num_dword_regs)
|
||
{
|
||
/* Support dword pseudo-register if it hasn't been disabled. */
|
||
tdep->eax_regnum = ymm0_regnum;
|
||
ymm0_regnum += tdep->num_dword_regs;
|
||
}
|
||
else
|
||
tdep->eax_regnum = -1;
|
||
|
||
mm0_regnum = ymm0_regnum;
|
||
if (tdep->num_ymm_regs)
|
||
{
|
||
/* Support YMM pseudo-register if it is available. */
|
||
tdep->ymm0_regnum = ymm0_regnum;
|
||
mm0_regnum += tdep->num_ymm_regs;
|
||
}
|
||
else
|
||
tdep->ymm0_regnum = -1;
|
||
|
||
bnd0_regnum = mm0_regnum;
|
||
if (tdep->num_mmx_regs != 0)
|
||
{
|
||
/* Support MMX pseudo-register if MMX hasn't been disabled. */
|
||
tdep->mm0_regnum = mm0_regnum;
|
||
bnd0_regnum += tdep->num_mmx_regs;
|
||
}
|
||
else
|
||
tdep->mm0_regnum = -1;
|
||
|
||
if (tdep->bnd0r_regnum > 0)
|
||
tdep->bnd0_regnum = bnd0_regnum;
|
||
else
|
||
tdep-> bnd0_regnum = -1;
|
||
|
||
/* Hook in the legacy prologue-based unwinders last (fallback). */
|
||
frame_unwind_append_unwinder (gdbarch, &i386_stack_tramp_frame_unwind);
|
||
frame_unwind_append_unwinder (gdbarch, &i386_sigtramp_frame_unwind);
|
||
frame_unwind_append_unwinder (gdbarch, &i386_frame_unwind);
|
||
|
||
/* If we have a register mapping, enable the generic core file
|
||
support, unless it has already been enabled. */
|
||
if (tdep->gregset_reg_offset
|
||
&& !gdbarch_regset_from_core_section_p (gdbarch))
|
||
set_gdbarch_regset_from_core_section (gdbarch,
|
||
i386_regset_from_core_section);
|
||
|
||
set_gdbarch_skip_permanent_breakpoint (gdbarch,
|
||
i386_skip_permanent_breakpoint);
|
||
|
||
set_gdbarch_fast_tracepoint_valid_at (gdbarch,
|
||
i386_fast_tracepoint_valid_at);
|
||
|
||
return gdbarch;
|
||
}
|
||
|
||
static enum gdb_osabi
|
||
i386_coff_osabi_sniffer (bfd *abfd)
|
||
{
|
||
if (strcmp (bfd_get_target (abfd), "coff-go32-exe") == 0
|
||
|| strcmp (bfd_get_target (abfd), "coff-go32") == 0)
|
||
return GDB_OSABI_GO32;
|
||
|
||
return GDB_OSABI_UNKNOWN;
|
||
}
|
||
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
void _initialize_i386_tdep (void);
|
||
|
||
void
|
||
_initialize_i386_tdep (void)
|
||
{
|
||
register_gdbarch_init (bfd_arch_i386, i386_gdbarch_init);
|
||
|
||
/* Add the variable that controls the disassembly flavor. */
|
||
add_setshow_enum_cmd ("disassembly-flavor", no_class, valid_flavors,
|
||
&disassembly_flavor, _("\
|
||
Set the disassembly flavor."), _("\
|
||
Show the disassembly flavor."), _("\
|
||
The valid values are \"att\" and \"intel\", and the default value is \"att\"."),
|
||
NULL,
|
||
NULL, /* FIXME: i18n: */
|
||
&setlist, &showlist);
|
||
|
||
/* Add the variable that controls the convention for returning
|
||
structs. */
|
||
add_setshow_enum_cmd ("struct-convention", no_class, valid_conventions,
|
||
&struct_convention, _("\
|
||
Set the convention for returning small structs."), _("\
|
||
Show the convention for returning small structs."), _("\
|
||
Valid values are \"default\", \"pcc\" and \"reg\", and the default value\n\
|
||
is \"default\"."),
|
||
NULL,
|
||
NULL, /* FIXME: i18n: */
|
||
&setlist, &showlist);
|
||
|
||
gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
|
||
i386_coff_osabi_sniffer);
|
||
|
||
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SVR4,
|
||
i386_svr4_init_abi);
|
||
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_GO32,
|
||
i386_go32_init_abi);
|
||
|
||
/* Initialize the i386-specific register groups. */
|
||
i386_init_reggroups ();
|
||
|
||
/* Initialize the standard target descriptions. */
|
||
initialize_tdesc_i386 ();
|
||
initialize_tdesc_i386_mmx ();
|
||
initialize_tdesc_i386_avx ();
|
||
initialize_tdesc_i386_mpx ();
|
||
|
||
/* Tell remote stub that we support XML target description. */
|
||
register_remote_support_xml ("i386");
|
||
}
|