mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-25 02:53:48 +08:00
235 lines
6.6 KiB
C
235 lines
6.6 KiB
C
/* Target-dependent code for FreeBSD/i386.
|
||
|
||
Copyright (C) 2003-2005, 2007-2012 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 "gdbcore.h"
|
||
#include "osabi.h"
|
||
#include "regcache.h"
|
||
|
||
#include "gdb_assert.h"
|
||
|
||
#include "i386-tdep.h"
|
||
#include "i387-tdep.h"
|
||
#include "bsd-uthread.h"
|
||
#include "solib-svr4.h"
|
||
|
||
/* FreeBSD 3.0-RELEASE or later. */
|
||
|
||
/* From <machine/reg.h>. */
|
||
static int i386fbsd_r_reg_offset[] =
|
||
{
|
||
9 * 4, 8 * 4, 7 * 4, 6 * 4, /* %eax, %ecx, %edx, %ebx */
|
||
15 * 4, 4 * 4, /* %esp, %ebp */
|
||
3 * 4, 2 * 4, /* %esi, %edi */
|
||
12 * 4, 14 * 4, /* %eip, %eflags */
|
||
13 * 4, 16 * 4, /* %cs, %ss */
|
||
1 * 4, 0 * 4, -1, -1 /* %ds, %es, %fs, %gs */
|
||
};
|
||
|
||
/* Sigtramp routine location. */
|
||
CORE_ADDR i386fbsd_sigtramp_start_addr = 0xbfbfdf20;
|
||
CORE_ADDR i386fbsd_sigtramp_end_addr = 0xbfbfdff0;
|
||
|
||
/* From <machine/signal.h>. */
|
||
int i386fbsd_sc_reg_offset[] =
|
||
{
|
||
8 + 14 * 4, /* %eax */
|
||
8 + 13 * 4, /* %ecx */
|
||
8 + 12 * 4, /* %edx */
|
||
8 + 11 * 4, /* %ebx */
|
||
8 + 0 * 4, /* %esp */
|
||
8 + 1 * 4, /* %ebp */
|
||
8 + 10 * 4, /* %esi */
|
||
8 + 9 * 4, /* %edi */
|
||
8 + 3 * 4, /* %eip */
|
||
8 + 4 * 4, /* %eflags */
|
||
8 + 7 * 4, /* %cs */
|
||
8 + 8 * 4, /* %ss */
|
||
8 + 6 * 4, /* %ds */
|
||
8 + 5 * 4, /* %es */
|
||
8 + 15 * 4, /* %fs */
|
||
8 + 16 * 4 /* %gs */
|
||
};
|
||
|
||
/* From /usr/src/lib/libc/i386/gen/_setjmp.S. */
|
||
static int i386fbsd_jmp_buf_reg_offset[] =
|
||
{
|
||
-1, /* %eax */
|
||
-1, /* %ecx */
|
||
-1, /* %edx */
|
||
1 * 4, /* %ebx */
|
||
2 * 4, /* %esp */
|
||
3 * 4, /* %ebp */
|
||
4 * 4, /* %esi */
|
||
5 * 4, /* %edi */
|
||
0 * 4 /* %eip */
|
||
};
|
||
|
||
static void
|
||
i386fbsd_supply_uthread (struct regcache *regcache,
|
||
int regnum, CORE_ADDR addr)
|
||
{
|
||
char buf[4];
|
||
int i;
|
||
|
||
gdb_assert (regnum >= -1);
|
||
|
||
for (i = 0; i < ARRAY_SIZE (i386fbsd_jmp_buf_reg_offset); i++)
|
||
{
|
||
if (i386fbsd_jmp_buf_reg_offset[i] != -1
|
||
&& (regnum == -1 || regnum == i))
|
||
{
|
||
read_memory (addr + i386fbsd_jmp_buf_reg_offset[i], buf, 4);
|
||
regcache_raw_supply (regcache, i, buf);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
i386fbsd_collect_uthread (const struct regcache *regcache,
|
||
int regnum, CORE_ADDR addr)
|
||
{
|
||
char buf[4];
|
||
int i;
|
||
|
||
gdb_assert (regnum >= -1);
|
||
|
||
for (i = 0; i < ARRAY_SIZE (i386fbsd_jmp_buf_reg_offset); i++)
|
||
{
|
||
if (i386fbsd_jmp_buf_reg_offset[i] != -1
|
||
&& (regnum == -1 || regnum == i))
|
||
{
|
||
regcache_raw_collect (regcache, i, buf);
|
||
write_memory (addr + i386fbsd_jmp_buf_reg_offset[i], buf, 4);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
i386fbsdaout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
/* Obviously FreeBSD is BSD-based. */
|
||
i386bsd_init_abi (info, gdbarch);
|
||
|
||
/* FreeBSD has a different `struct reg', and reserves some space for
|
||
its FPU emulator in `struct fpreg'. */
|
||
tdep->gregset_reg_offset = i386fbsd_r_reg_offset;
|
||
tdep->gregset_num_regs = ARRAY_SIZE (i386fbsd_r_reg_offset);
|
||
tdep->sizeof_gregset = 18 * 4;
|
||
tdep->sizeof_fpregset = 176;
|
||
|
||
/* FreeBSD uses -freg-struct-return by default. */
|
||
tdep->struct_return = reg_struct_return;
|
||
|
||
/* FreeBSD uses a different memory layout. */
|
||
tdep->sigtramp_start = i386fbsd_sigtramp_start_addr;
|
||
tdep->sigtramp_end = i386fbsd_sigtramp_end_addr;
|
||
|
||
/* FreeBSD has a more complete `struct sigcontext'. */
|
||
tdep->sc_reg_offset = i386fbsd_sc_reg_offset;
|
||
tdep->sc_num_regs = ARRAY_SIZE (i386fbsd_sc_reg_offset);
|
||
|
||
/* FreeBSD provides a user-level threads implementation. */
|
||
bsd_uthread_set_supply_uthread (gdbarch, i386fbsd_supply_uthread);
|
||
bsd_uthread_set_collect_uthread (gdbarch, i386fbsd_collect_uthread);
|
||
}
|
||
|
||
static void
|
||
i386fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
/* It's almost identical to FreeBSD a.out. */
|
||
i386fbsdaout_init_abi (info, gdbarch);
|
||
|
||
/* Except that it uses ELF. */
|
||
i386_elf_init_abi (info, gdbarch);
|
||
|
||
/* FreeBSD ELF uses SVR4-style shared libraries. */
|
||
set_solib_svr4_fetch_link_map_offsets
|
||
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
|
||
}
|
||
|
||
/* FreeBSD 4.0-RELEASE or later. */
|
||
|
||
/* From <machine/reg.h>. */
|
||
static int i386fbsd4_r_reg_offset[] =
|
||
{
|
||
10 * 4, 9 * 4, 8 * 4, 7 * 4, /* %eax, %ecx, %edx, %ebx */
|
||
16 * 4, 5 * 4, /* %esp, %ebp */
|
||
4 * 4, 3 * 4, /* %esi, %edi */
|
||
13 * 4, 15 * 4, /* %eip, %eflags */
|
||
14 * 4, 17 * 4, /* %cs, %ss */
|
||
2 * 4, 1 * 4, 0 * 4, 18 * 4 /* %ds, %es, %fs, %gs */
|
||
};
|
||
|
||
/* From <machine/signal.h>. */
|
||
int i386fbsd4_sc_reg_offset[] =
|
||
{
|
||
20 + 11 * 4, /* %eax */
|
||
20 + 10 * 4, /* %ecx */
|
||
20 + 9 * 4, /* %edx */
|
||
20 + 8 * 4, /* %ebx */
|
||
20 + 17 * 4, /* %esp */
|
||
20 + 6 * 4, /* %ebp */
|
||
20 + 5 * 4, /* %esi */
|
||
20 + 4 * 4, /* %edi */
|
||
20 + 14 * 4, /* %eip */
|
||
20 + 16 * 4, /* %eflags */
|
||
20 + 15 * 4, /* %cs */
|
||
20 + 18 * 4, /* %ss */
|
||
20 + 3 * 4, /* %ds */
|
||
20 + 2 * 4, /* %es */
|
||
20 + 1 * 4, /* %fs */
|
||
20 + 0 * 4 /* %gs */
|
||
};
|
||
|
||
static void
|
||
i386fbsd4_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
/* Inherit stuff from older releases. We assume that FreeBSD
|
||
4.0-RELEASE always uses ELF. */
|
||
i386fbsd_init_abi (info, gdbarch);
|
||
|
||
/* FreeBSD 4.0 introduced a new `struct reg'. */
|
||
tdep->gregset_reg_offset = i386fbsd4_r_reg_offset;
|
||
tdep->gregset_num_regs = ARRAY_SIZE (i386fbsd4_r_reg_offset);
|
||
tdep->sizeof_gregset = 19 * 4;
|
||
|
||
/* FreeBSD 4.0 introduced a new `struct sigcontext'. */
|
||
tdep->sc_reg_offset = i386fbsd4_sc_reg_offset;
|
||
tdep->sc_num_regs = ARRAY_SIZE (i386fbsd4_sc_reg_offset);
|
||
}
|
||
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
void _initialize_i386fbsd_tdep (void);
|
||
|
||
void
|
||
_initialize_i386fbsd_tdep (void)
|
||
{
|
||
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_AOUT,
|
||
i386fbsdaout_init_abi);
|
||
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_ELF,
|
||
i386fbsd4_init_abi);
|
||
}
|