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2c02bd7290
"name" parameter to const char ** from char **. All callers updated. (find_pc_partial_function): Ditto. (cache_pc_function_name): Change type to const char * from char *. * symtab.h ((find_pc_partial_function_gnu_ifunc): Update. (find_pc_partial_function): Update. * alpha-tdep.h (struct gdbarch_tdep, member pc_in_sigtramp): Change type of "name" parameter to const char * from char *. All uses updated. * arch-utils.c (generic_in_solib_return_trampoline): Change type of "name" parameter to const char * from char *. * arch-utils.h (generic_in_solib_return_trampoline): Update. * frv-linux-tdep.c (frv_linux_pc_in_sigtramp): Change type of "name" parameter to const char * from char *. * gdbarch.sh (in_solib_return_trampoline): Ditto. * gdbarch.c: Regenerate. * gdbarch.h: Regenerate. * hppa-hpux-tdep.c (hppa_hpux_in_solib_return_trampoline): Update. * rs6000-tdep.c (rs6000_in_solib_return_trampoline): Update. * m32r-linux-tdep.c (m32r_linux_pc_in_sigtramp): Change type of "name" parameter to const char * from char *. * skip.c (skip_function_pc): Ditto. * sparc-sol2-tdep.c (sparc_sol2_pc_in_sigtramp): Ditto. * sparc-tdep.h (sparc_sol2_pc_in_sigtramp): Update. * sparc64fbsd-tdep.c (sparc64fbsd_pc_in_sigtramp): Ditto. * sparc64nbsd-tdep.c (sparc64nbsd_pc_in_sigtramp): Ditto. * sparc64obsd-tdep.c (sparc64obsd_pc_in_sigtramp): Ditto. * sparcnbsd-tdep.c (sparc32nbsd_pc_in_sigtramp): Ditto. * sparcobsd-tdep.c (sparc32obsd_pc_in_sigtramp): Ditto. * nbsd-tdep.c (nbsd_pc_in_sigtramp): Similary for "func_name". * nbsd-tdep.h (nbsd_pc_in_sigtramp): Update.
138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
/* Target-dependent code for OpenBSD/alpha.
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Copyright (C) 2006-2012 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 "frame.h"
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#include "gdbcore.h"
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#include "osabi.h"
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#include "obsd-tdep.h"
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#include "alpha-tdep.h"
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#include "alphabsd-tdep.h"
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#include "solib-svr4.h"
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/* Signal trampolines. */
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/* The OpenBSD kernel maps the signal trampoline at some random
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location in user space, which means that the traditional BSD way of
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detecting it won't work.
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The signal trampoline will be mapped at an address that is page
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aligned. We recognize the signal trampoline by looking for the
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sigreturn system call. */
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static const int alphaobsd_page_size = 8192;
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static LONGEST
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alphaobsd_sigtramp_offset (struct gdbarch *gdbarch, CORE_ADDR pc)
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{
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return (pc & (alphaobsd_page_size - 1));
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}
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static int
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alphaobsd_pc_in_sigtramp (struct gdbarch *gdbarch,
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CORE_ADDR pc, const char *name)
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{
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CORE_ADDR start_pc = (pc & ~(alphaobsd_page_size - 1));
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unsigned insn;
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if (name)
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return 0;
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/* Check for "". */
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insn = alpha_read_insn (gdbarch, start_pc + 5 * ALPHA_INSN_SIZE);
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if (insn != 0x201f0067)
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return 0;
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/* Check for "". */
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insn = alpha_read_insn (gdbarch, start_pc + 6 * ALPHA_INSN_SIZE);
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if (insn != 0x00000083)
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return 0;
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return 1;
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}
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static CORE_ADDR
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alphaobsd_sigcontext_addr (struct frame_info *this_frame)
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{
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struct gdbarch *gdbarch = get_frame_arch (this_frame);
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CORE_ADDR pc = get_frame_pc (this_frame);
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if (alphaobsd_sigtramp_offset (gdbarch, pc) < 3 * ALPHA_INSN_SIZE)
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{
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/* On entry, a pointer the `struct sigcontext' is passed in %a2. */
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return get_frame_register_unsigned (this_frame, ALPHA_A0_REGNUM + 2);
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}
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else if (alphaobsd_sigtramp_offset (gdbarch, pc) < 4 * ALPHA_INSN_SIZE)
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{
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/* It is stored on the stack Before calling the signal handler. */
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CORE_ADDR sp;
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sp = get_frame_register_unsigned (this_frame, ALPHA_SP_REGNUM);
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return get_frame_memory_unsigned (this_frame, sp, 8);
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}
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else
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{
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/* It is reloaded into %a0 for the sigreturn(2) call. */
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return get_frame_register_unsigned (this_frame, ALPHA_A0_REGNUM);
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}
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}
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static void
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alphaobsd_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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/* Hook into the DWARF CFI frame unwinder. */
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alpha_dwarf2_init_abi (info, gdbarch);
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/* Hook into the MDEBUG frame unwinder. */
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alpha_mdebug_init_abi (info, gdbarch);
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/* OpenBSD/alpha 3.0 and earlier does not provide single step
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support via ptrace(2); use software single-stepping for now. */
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set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
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/* OpenBSD/alpha has SVR4-style shared libraries. */
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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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set_gdbarch_skip_solib_resolver (gdbarch, obsd_skip_solib_resolver);
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tdep->dynamic_sigtramp_offset = alphaobsd_sigtramp_offset;
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tdep->pc_in_sigtramp = alphaobsd_pc_in_sigtramp;
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tdep->sigcontext_addr = alphaobsd_sigcontext_addr;
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tdep->jb_pc = 2;
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tdep->jb_elt_size = 8;
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set_gdbarch_regset_from_core_section
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(gdbarch, alphanbsd_regset_from_core_section);
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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void _initialize_alphaobsd_tdep (void);
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void
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_initialize_alphaobsd_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_OPENBSD_ELF,
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alphaobsd_init_abi);
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}
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