mirror/binutils-gdb
2
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2025-04-24 14:53:34 +08:00
Code Issues Packages Projects Releases Wiki Activity
binutils-gdb/gdb/i386-netbsd-tdep.c
Andrew Burgess 1d506c26d9 Update copyright year range in header of all files managed by GDB 
This commit is the result of the following actions:

  - Running gdb/copyright.py to update all of the copyright headers to
    include 2024,

  - Manually updating a few files the copyright.py script told me to
    update, these files had copyright headers embedded within the
    file,

  - Regenerating gdbsupport/Makefile.in to refresh it's copyright
    date,

  - Using grep to find other files that still mentioned 2023.  If
    these files were updated last year from 2022 to 2023 then I've
    updated them this year to 2024.

I'm sure I've probably missed some dates.  Feel free to fix them up as
you spot them.
2024-01-12 15:49:57 +00:00

433 lines
11 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* Target-dependent code for NetBSD/i386.
Copyright (C) 1988-2024 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 "arch-utils.h"
#include "frame.h"
#include "gdbcore.h"
#include "regcache.h"
#include "regset.h"
#include "osabi.h"
#include "symtab.h"
#include "trad-frame.h"
#include "tramp-frame.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
#include "netbsd-tdep.h"
#include "solib-svr4.h"
/* From <machine/reg.h>. */
static int i386nbsd_r_reg_offset[] =
{
0 * 4, /* %eax */
1 * 4, /* %ecx */
2 * 4, /* %edx */
3 * 4, /* %ebx */
4 * 4, /* %esp */
5 * 4, /* %ebp */
6 * 4, /* %esi */
7 * 4, /* %edi */
8 * 4, /* %eip */
9 * 4, /* %eflags */
10 * 4, /* %cs */
11 * 4, /* %ss */
12 * 4, /* %ds */
13 * 4, /* %es */
14 * 4, /* %fs */
15 * 4 /* %gs */
};
/* From <machine/signal.h>. */
static int i386nbsd_sc_reg_offset[] =
{
10 * 4, /* %eax */
9 * 4, /* %ecx */
8 * 4, /* %edx */
7 * 4, /* %ebx */
14 * 4, /* %esp */
6 * 4, /* %ebp */
5 * 4, /* %esi */
4 * 4, /* %edi */
11 * 4, /* %eip */
13 * 4, /* %eflags */
12 * 4, /* %cs */
15 * 4, /* %ss */
3 * 4, /* %ds */
2 * 4, /* %es */
1 * 4, /* %fs */
0 * 4 /* %gs */
};
/* From <machine/mcontext.h>. */
static int i386nbsd_mc_reg_offset[] =
{
11 * 4, /* %eax */
10 * 4, /* %ecx */
9 * 4, /* %edx */
8 * 4, /* %ebx */
7 * 4, /* %esp */
6 * 4, /* %ebp */
5 * 4, /* %esi */
4 * 4, /* %edi */
14 * 4, /* %eip */
16 * 4, /* %eflags */
15 * 4, /* %cs */
18 * 4, /* %ss */
3 * 4, /* %ds */
2 * 4, /* %es */
1 * 4, /* %fs */
0 * 4 /* %gs */
};
static void i386nbsd_sigtramp_cache_init (const struct tramp_frame *,
frame_info_ptr,
struct trad_frame_cache *,
CORE_ADDR);
static const struct tramp_frame i386nbsd_sigtramp_sc16 =
{
SIGTRAMP_FRAME,
1,
{
/* leal 0x10(%esp), %eax */
{ 0x8d, ULONGEST_MAX },
{ 0x44, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x10, ULONGEST_MAX },
/* pushl %eax */
{ 0x50, ULONGEST_MAX },
/* pushl %eax */
{ 0x50, ULONGEST_MAX },
/* movl $0x127, %eax # __sigreturn14 */
{ 0xb8, ULONGEST_MAX },
{ 0x27, ULONGEST_MAX },
{0x01, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
/* int $0x80 */
{ 0xcd, ULONGEST_MAX },
{ 0x80, ULONGEST_MAX},
/* movl $0x1, %eax # exit */
{ 0xb8, ULONGEST_MAX },
{ 0x01, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
/* int $0x80 */
{ 0xcd, ULONGEST_MAX },
{ 0x80, ULONGEST_MAX},
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
},
i386nbsd_sigtramp_cache_init
};
static const struct tramp_frame i386nbsd_sigtramp_sc2 =
{
SIGTRAMP_FRAME,
1,
{
/* leal 0x0c(%esp), %eax */
{ 0x8d, ULONGEST_MAX },
{ 0x44, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x0c, ULONGEST_MAX },
/* movl %eax, 0x4(%esp) */
{ 0x89, ULONGEST_MAX },
{ 0x44, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x04, ULONGEST_MAX },
/* movl $0x127, %eax # __sigreturn14 */
{ 0xb8, ULONGEST_MAX },
{ 0x27, ULONGEST_MAX },
{0x01, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
/* int $0x80 */
{ 0xcd, ULONGEST_MAX },
{ 0x80, ULONGEST_MAX},
/* movl %eax, 0x4(%esp) */
{ 0x89, ULONGEST_MAX },
{ 0x44, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x04, ULONGEST_MAX },
/* movl $0x1, %eax */
{ 0xb8, ULONGEST_MAX },
{ 0x01, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
/* int $0x80 */
{ 0xcd, ULONGEST_MAX },
{ 0x80, ULONGEST_MAX},
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
},
i386nbsd_sigtramp_cache_init
};
static const struct tramp_frame i386nbsd_sigtramp_si2 =
{
SIGTRAMP_FRAME,
1,
{
/* movl 8(%esp),%eax */
{ 0x8b, ULONGEST_MAX },
{ 0x44, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x08, ULONGEST_MAX },
/* movl %eax, 0x4(%esp) */
{ 0x89, ULONGEST_MAX },
{ 0x44, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x04, ULONGEST_MAX },
/* movl $0x134, %eax # setcontext */
{ 0xb8, ULONGEST_MAX },
{ 0x34, ULONGEST_MAX },
{ 0x01, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
/* int $0x80 */
{ 0xcd, ULONGEST_MAX },
{ 0x80, ULONGEST_MAX },
/* movl %eax, 0x4(%esp) */
{ 0x89, ULONGEST_MAX },
{ 0x44, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x04, ULONGEST_MAX },
/* movl $0x1, %eax */
{ 0xb8, ULONGEST_MAX },
{ 0x01, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
/* int $0x80 */
{ 0xcd, ULONGEST_MAX },
{ 0x80, ULONGEST_MAX },
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
},
i386nbsd_sigtramp_cache_init
};
static const struct tramp_frame i386nbsd_sigtramp_si31 =
{
SIGTRAMP_FRAME,
1,
{
/* leal 0x8c(%esp), %eax */
{ 0x8d, ULONGEST_MAX },
{ 0x84, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x8c, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
/* movl %eax, 0x4(%esp) */
{ 0x89, ULONGEST_MAX },
{ 0x44, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x04, ULONGEST_MAX },
/* movl $0x134, %eax # setcontext */
{ 0xb8, ULONGEST_MAX },
{ 0x34, ULONGEST_MAX },
{ 0x01, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
/* int $0x80 */
{ 0xcd, ULONGEST_MAX },
{ 0x80, ULONGEST_MAX},
/* movl %eax, 0x4(%esp) */
{ 0x89, ULONGEST_MAX },
{ 0x44, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x04, ULONGEST_MAX },
/* movl $0x1, %eax */
{ 0xb8, ULONGEST_MAX },
{ 0x01, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
/* int $0x80 */
{ 0xcd, ULONGEST_MAX },
{ 0x80, ULONGEST_MAX},
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
},
i386nbsd_sigtramp_cache_init
};
static const struct tramp_frame i386nbsd_sigtramp_si4 =
{
SIGTRAMP_FRAME,
1,
{
/* leal 0x8c(%esp), %eax */
{ 0x8d, ULONGEST_MAX },
{ 0x84, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x8c, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
/* movl %eax, 0x4(%esp) */
{ 0x89, ULONGEST_MAX },
{ 0x44, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x04, ULONGEST_MAX },
/* movl $0x134, %eax # setcontext */
{ 0xb8, ULONGEST_MAX },
{ 0x34, ULONGEST_MAX },
{ 0x01, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
{ 0x00, ULONGEST_MAX },
/* int $0x80 */
{ 0xcd, ULONGEST_MAX },
{ 0x80, ULONGEST_MAX},
/* movl $0xffffffff,0x4(%esp) */
{ 0xc7, ULONGEST_MAX },
{ 0x44, ULONGEST_MAX },
{ 0x24, ULONGEST_MAX },
{ 0x04, ULONGEST_MAX },
{ 0xff, ULONGEST_MAX },
{ 0xff, ULONGEST_MAX },
{ 0xff, ULONGEST_MAX },
{ 0xff, ULONGEST_MAX },
/* movl $0x1, %eax */
{ 0xb8, ULONGEST_MAX },
{ 0x01, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
{0x00, ULONGEST_MAX },
/* int $0x80 */
{ 0xcd, ULONGEST_MAX },
{ 0x80, ULONGEST_MAX},
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
},
i386nbsd_sigtramp_cache_init
};
static void
i386nbsd_sigtramp_cache_init (const struct tramp_frame *self,
frame_info_ptr this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR sp = get_frame_register_unsigned (this_frame, I386_ESP_REGNUM);
CORE_ADDR base;
int *reg_offset;
int num_regs;
int i;
if (self == &i386nbsd_sigtramp_sc16 || self == &i386nbsd_sigtramp_sc2)
{
reg_offset = i386nbsd_sc_reg_offset;
num_regs = ARRAY_SIZE (i386nbsd_sc_reg_offset);
/* Read in the sigcontext address. */
base = read_memory_unsigned_integer (sp + 8, 4, byte_order);
}
else
{
reg_offset = i386nbsd_mc_reg_offset;
num_regs = ARRAY_SIZE (i386nbsd_mc_reg_offset);
/* Read in the ucontext address. */
base = read_memory_unsigned_integer (sp + 8, 4, byte_order);
/* offsetof(ucontext_t, uc_mcontext) == 36 */
base += 36;
}
for (i = 0; i < num_regs; i++)
if (reg_offset[i] != -1)
trad_frame_set_reg_addr (this_cache, i, base + reg_offset[i]);
/* Construct the frame ID using the function start. */
trad_frame_set_id (this_cache, frame_id_build (sp, func));
}
static void
i386nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_gdbarch_tdep> (gdbarch);
/* Obviously NetBSD is BSD-based. */
i386bsd_init_abi (info, gdbarch);
nbsd_init_abi (info, gdbarch);
/* NetBSD has a different `struct reg'. */
tdep->gregset_reg_offset = i386nbsd_r_reg_offset;
tdep->gregset_num_regs = ARRAY_SIZE (i386nbsd_r_reg_offset);
tdep->sizeof_gregset = 16 * 4;
/* NetBSD uses -freg-struct-return by default. */
tdep->struct_return = reg_struct_return;
/* NetBSD uses tramp_frame sniffers for signal trampolines. */
tdep->sigcontext_addr= 0;
tdep->sigtramp_start = 0;
tdep->sigtramp_end = 0;
tdep->sigtramp_p = 0;
tdep->sc_reg_offset = 0;
tdep->sc_num_regs = 0;
tramp_frame_prepend_unwinder (gdbarch, &i386nbsd_sigtramp_sc16);
tramp_frame_prepend_unwinder (gdbarch, &i386nbsd_sigtramp_sc2);
tramp_frame_prepend_unwinder (gdbarch, &i386nbsd_sigtramp_si2);
tramp_frame_prepend_unwinder (gdbarch, &i386nbsd_sigtramp_si31);
tramp_frame_prepend_unwinder (gdbarch, &i386nbsd_sigtramp_si4);
}
/* NetBSD ELF. */
static void
i386nbsdelf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_gdbarch_tdep> (gdbarch);
/* It's still NetBSD. */
i386nbsd_init_abi (info, gdbarch);
/* But ELF-based. */
i386_elf_init_abi (info, gdbarch);
/* NetBSD ELF uses SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
/* NetBSD ELF uses -fpcc-struct-return by default. */
tdep->struct_return = pcc_struct_return;
}
void _initialize_i386nbsd_tdep ();
void
_initialize_i386nbsd_tdep ()
{
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_NETBSD,
i386nbsdelf_init_abi);
}
Reference in New Issue View Git Blame Copy Permalink