mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
bd2b40ac12
This changes GDB to use frame_info_ptr instead of frame_info *
The substitution was done with multiple sequential `sed` commands:
sed 's/^struct frame_info;/class frame_info_ptr;/'
sed 's/struct frame_info \*/frame_info_ptr /g' - which left some
issues in a few files, that were manually fixed.
sed 's/\<frame_info \*/frame_info_ptr /g'
sed 's/frame_info_ptr $/frame_info_ptr/g' - used to remove whitespace
problems.
The changed files were then manually checked and some 'sed' changes
undone, some constructors and some gets were added, according to what
made sense, and what Tromey originally did
Co-Authored-By: Bruno Larsen <blarsen@redhat.com>
Approved-by: Tom Tomey <tom@tromey.com>
136 lines
4.0 KiB
C
136 lines
4.0 KiB
C
/* Target-dependent code for OpenBSD/alpha.
|
||
|
||
Copyright (C) 2006-2022 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#include "defs.h"
|
||
#include "frame.h"
|
||
#include "gdbcore.h"
|
||
#include "osabi.h"
|
||
|
||
#include "obsd-tdep.h"
|
||
#include "alpha-tdep.h"
|
||
#include "alpha-bsd-tdep.h"
|
||
#include "solib-svr4.h"
|
||
|
||
/* Signal trampolines. */
|
||
|
||
/* The OpenBSD kernel maps the signal trampoline at some random
|
||
location in user space, which means that the traditional BSD way of
|
||
detecting it won't work.
|
||
|
||
The signal trampoline will be mapped at an address that is page
|
||
aligned. We recognize the signal trampoline by looking for the
|
||
sigreturn system call. */
|
||
|
||
static const int alphaobsd_page_size = 8192;
|
||
|
||
static LONGEST
|
||
alphaobsd_sigtramp_offset (struct gdbarch *gdbarch, CORE_ADDR pc)
|
||
{
|
||
return (pc & (alphaobsd_page_size - 1));
|
||
}
|
||
|
||
static int
|
||
alphaobsd_pc_in_sigtramp (struct gdbarch *gdbarch,
|
||
CORE_ADDR pc, const char *name)
|
||
{
|
||
CORE_ADDR start_pc = (pc & ~(alphaobsd_page_size - 1));
|
||
unsigned insn;
|
||
|
||
if (name)
|
||
return 0;
|
||
|
||
/* Check for "". */
|
||
insn = alpha_read_insn (gdbarch, start_pc + 5 * ALPHA_INSN_SIZE);
|
||
if (insn != 0x201f0067)
|
||
return 0;
|
||
|
||
/* Check for "". */
|
||
insn = alpha_read_insn (gdbarch, start_pc + 6 * ALPHA_INSN_SIZE);
|
||
if (insn != 0x00000083)
|
||
return 0;
|
||
|
||
return 1;
|
||
}
|
||
|
||
static CORE_ADDR
|
||
alphaobsd_sigcontext_addr (frame_info_ptr this_frame)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
||
CORE_ADDR pc = get_frame_pc (this_frame);
|
||
|
||
if (alphaobsd_sigtramp_offset (gdbarch, pc) < 3 * ALPHA_INSN_SIZE)
|
||
{
|
||
/* On entry, a pointer the `struct sigcontext' is passed in %a2. */
|
||
return get_frame_register_unsigned (this_frame, ALPHA_A0_REGNUM + 2);
|
||
}
|
||
else if (alphaobsd_sigtramp_offset (gdbarch, pc) < 4 * ALPHA_INSN_SIZE)
|
||
{
|
||
/* It is stored on the stack Before calling the signal handler. */
|
||
CORE_ADDR sp;
|
||
sp = get_frame_register_unsigned (this_frame, ALPHA_SP_REGNUM);
|
||
return get_frame_memory_unsigned (this_frame, sp, 8);
|
||
}
|
||
else
|
||
{
|
||
/* It is reloaded into %a0 for the sigreturn(2) call. */
|
||
return get_frame_register_unsigned (this_frame, ALPHA_A0_REGNUM);
|
||
}
|
||
}
|
||
|
||
|
||
static void
|
||
alphaobsd_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
alpha_gdbarch_tdep *tdep = gdbarch_tdep<alpha_gdbarch_tdep> (gdbarch);
|
||
|
||
/* Hook into the DWARF CFI frame unwinder. */
|
||
alpha_dwarf2_init_abi (info, gdbarch);
|
||
|
||
/* Hook into the MDEBUG frame unwinder. */
|
||
alpha_mdebug_init_abi (info, gdbarch);
|
||
|
||
/* OpenBSD/alpha 3.0 and earlier does not provide single step
|
||
support via ptrace(2); use software single-stepping for now. */
|
||
set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
|
||
|
||
/* OpenBSD/alpha has SVR4-style shared libraries. */
|
||
set_solib_svr4_fetch_link_map_offsets
|
||
(gdbarch, svr4_lp64_fetch_link_map_offsets);
|
||
set_gdbarch_skip_solib_resolver (gdbarch, obsd_skip_solib_resolver);
|
||
|
||
tdep->dynamic_sigtramp_offset = alphaobsd_sigtramp_offset;
|
||
tdep->pc_in_sigtramp = alphaobsd_pc_in_sigtramp;
|
||
tdep->sigcontext_addr = alphaobsd_sigcontext_addr;
|
||
|
||
tdep->jb_pc = 2;
|
||
tdep->jb_elt_size = 8;
|
||
|
||
set_gdbarch_iterate_over_regset_sections
|
||
(gdbarch, alphanbsd_iterate_over_regset_sections);
|
||
}
|
||
|
||
|
||
void _initialize_alphaobsd_tdep ();
|
||
void
|
||
_initialize_alphaobsd_tdep ()
|
||
{
|
||
gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_OPENBSD,
|
||
alphaobsd_init_abi);
|
||
}
|