old-cross-binutils/gdb/i386fbsd-tdep.c
Joel Brobecker a9762ec78a Switch the license of all .c files to GPLv3.
Switch the license of all .h files to GPLv3.
        Switch the license of all .cc files to GPLv3.
2007-08-23 18:08:50 +00:00

234 lines
6.6 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 FreeBSD/i386.
Copyright (C) 2003, 2004, 2005, 2007 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);
}