130 lines
3.9 KiB
C
130 lines
3.9 KiB
C
/* Target-dependent code for GNU/Linux UltraSPARC.
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Copyright 2003, 2004, 2005 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 "frame.h"
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#include "frame-unwind.h"
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#include "gdbarch.h"
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#include "osabi.h"
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#include "solib-svr4.h"
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#include "symtab.h"
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#include "trad-frame.h"
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#include "tramp-frame.h"
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#include "sparc64-tdep.h"
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/* Signal trampoline support. */
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static void sparc64_linux_sigframe_init (const struct tramp_frame *self,
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struct frame_info *next_frame,
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struct trad_frame_cache *this_cache,
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CORE_ADDR func);
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/* See sparc-linux-tdep.c for details. Note that 64-bit binaries only
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use RT signals. */
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static const struct tramp_frame sparc64_linux_rt_sigframe =
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{
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SIGTRAMP_FRAME,
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4,
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{
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{ 0x82102065, -1 }, /* mov __NR_rt_sigreturn, %g1 */
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{ 0x91d0206d, -1 }, /* ta 0x6d */
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{ TRAMP_SENTINEL_INSN, -1 }
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},
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sparc64_linux_sigframe_init
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};
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static void
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sparc64_linux_sigframe_init (const struct tramp_frame *self,
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struct frame_info *next_frame,
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struct trad_frame_cache *this_cache,
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CORE_ADDR func)
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{
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CORE_ADDR base, addr;
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int regnum;
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base = frame_unwind_register_unsigned (next_frame, SPARC_O1_REGNUM);
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base += 128;
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/* Offsets from <bits/sigcontext.h>. */
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/* Since %g0 is always zero, keep the identity encoding. */
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addr = base + 8;
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for (regnum = SPARC_G1_REGNUM; regnum <= SPARC_O7_REGNUM; regnum++)
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{
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trad_frame_set_reg_addr (this_cache, regnum, addr);
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addr += 8;
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}
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trad_frame_set_reg_addr (this_cache, SPARC64_STATE_REGNUM, addr + 0);
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trad_frame_set_reg_addr (this_cache, SPARC64_PC_REGNUM, addr + 8);
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trad_frame_set_reg_addr (this_cache, SPARC64_NPC_REGNUM, addr + 16);
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trad_frame_set_reg_addr (this_cache, SPARC64_Y_REGNUM, addr + 24);
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trad_frame_set_reg_addr (this_cache, SPARC64_FPRS_REGNUM, addr + 28);
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addr = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
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if (addr & 1)
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addr += BIAS;
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base = addr;
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for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
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{
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trad_frame_set_reg_addr (this_cache, regnum, addr);
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addr += 8;
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}
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trad_frame_set_id (this_cache, frame_id_build (base, func));
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}
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static void
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sparc64_linux_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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tramp_frame_prepend_unwinder (gdbarch, &sparc64_linux_rt_sigframe);
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sparc64_init_abi (info, gdbarch);
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/* GNU/Linux has SVR4-style shared libraries... */
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set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
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set_solib_svr4_fetch_link_map_offsets
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(gdbarch, svr4_lp64_fetch_link_map_offsets);
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/* ...which means that we need some special handling when doing
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prologue analysis. */
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tdep->plt_entry_size = 16;
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/* Enable TLS support. */
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set_gdbarch_fetch_tls_load_module_address (gdbarch,
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svr4_fetch_objfile_link_map);
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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extern void _initialize_sparc64_linux_tdep (void);
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void
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_initialize_sparc64_linux_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
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GDB_OSABI_LINUX, sparc64_linux_init_abi);
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}
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