8349554deb
(i386_sol2_init_abi): Initialize TDEP->sigcontext_addr, TDEP->sc_reg_offset and TDEP->sc_num_regs.
120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/* Target-dependent code for Solaris x86.
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Copyright 2002, 2003 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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "value.h"
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#include "osabi.h"
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#include "i386-tdep.h"
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/* From <ia32/sys/reg.h>. */
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static int i386_sol2_gregset_reg_offset[] =
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{
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11 * 4, /* %eax */
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10 * 4, /* %ecx */
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9 * 4, /* %edx */
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8 * 4, /* %ebx */
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17 * 4, /* %esp */
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6 * 4, /* %ebp */
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5 * 4, /* %esi */
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4 * 4, /* %edi */
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14 * 4, /* %eip */
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16 * 4, /* %eflags */
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15 * 4, /* %cs */
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18 * 4, /* %ss */
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3 * 4, /* %ds */
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2 * 4, /* %es */
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1 * 4, /* %fs */
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0 * 4 /* %gs */
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};
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static int
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i386_sol2_pc_in_sigtramp (CORE_ADDR pc, char *name)
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{
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/* Signal handler frames under Solaris 2 are recognized by a return
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address of 0xffffffff. */
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return (pc == 0xffffffff);
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}
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/* Solaris doesn't have a `struct sigcontext', but it does have a
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`mcontext_t' that contains the saved set of machine registers. */
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static CORE_ADDR
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i386_sol2_mcontext_addr (struct frame_info *next_frame)
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{
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CORE_ADDR sp, ucontext_addr;
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sp = frame_unwind_register_unsigned (next_frame, I386_ESP_REGNUM);
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ucontext_addr = get_frame_memory_unsigned (next_frame, sp + 8, 4);
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return ucontext_addr + 36;
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}
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/* Solaris 2. */
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static void
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i386_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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/* Solaris is SVR4-based. */
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i386_svr4_init_abi (info, gdbarch);
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/* Solaris reserves space for its FPU emulator in `fpregset_t'.
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There is also some space reserved for the registers of a Weitek
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math coprocessor. */
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tdep->gregset_reg_offset = i386_sol2_gregset_reg_offset;
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tdep->gregset_num_regs = ARRAY_SIZE (i386_sol2_gregset_reg_offset);
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tdep->sizeof_gregset = 19 * 4;
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tdep->sizeof_fpregset = 380;
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tdep->sigcontext_addr = i386_sol2_mcontext_addr;
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tdep->sc_reg_offset = tdep->gregset_reg_offset;
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tdep->sc_num_regs = tdep->gregset_num_regs;
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/* Signal trampolines are slightly different from SVR4. */
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set_gdbarch_pc_in_sigtramp (gdbarch, i386_sol2_pc_in_sigtramp);
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}
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static enum gdb_osabi
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i386_sol2_osabi_sniffer (bfd *abfd)
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{
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/* If we have a section named .SUNW_version, then it is almost
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certainly Solaris 2. */
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if (bfd_get_section_by_name (abfd, ".SUNW_version"))
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return GDB_OSABI_SOLARIS;
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return GDB_OSABI_UNKNOWN;
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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void _initialize_i386_sol2_tdep (void);
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void
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_initialize_i386_sol2_tdep (void)
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{
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/* Register an ELF OS ABI sniffer for Solaris 2 binaries. */
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gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
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i386_sol2_osabi_sniffer);
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gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SOLARIS,
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i386_sol2_init_abi);
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}
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