a338618604
* i386-tdep.h (struct gdbarch_tdep): Add members `sc_reg_offset' and `sc_num_regs'. (I386_EAX_REGNUM, I386_EDX_REGNUM, I386_ESP_REGNUM, I386_EBP_REGNUM, I386_EIP_REGNUM, I386_EFLAGS_REGNUM, I386_ST0_REGNUM): Move here from... * i386-tdep.c: ... here. (I386_NUM_SAVED_REGS): Define to I386_NUM_REGS. (i386_sigtramp_frame_cache): Use `sc_reg_offset' to find saved registers if possible. (i386_gdbarch_init): Initialize TDEP->sc_reg_offset. * i386bsd-tdep.c (i386bsd_sc_pc_offset, i386bsd_sc_sp_offset): Remove variables. (i386bsd_sc_reg_offset): New variable. (i386bsd_init_abi): Initialize TDEP->sc_reg_offset and TDEP->sc_num_regs instead of TDEP->sc_pc_offset and TDEP->sc_sp_offset. (i386fbsd_sc_reg_offset): New variable. (i386fbsdaout_init_abi): Initialize TDEP->sc_reg_offset and TDEP->sc_num_regs. (i386fbsd4_sc_pc_offset, i386fbsd4_sc_sp_offset): Remove variables. (i386fbsd4_sc_reg_offset): New variable. (i3864bsd4_init_abi): Initialize TDEP->sc_reg_offset and TDEP->sc_num_regs instead of TDEP->sc_pc_offset and TDEP->sc_sp_offset. * i386-linux-tdep.c (i386_linux_sc_reg_offset): New variable. (i386_linux_init_abi): Set TDEP->sc_reg_offset and TDEP->sc_num_regs. * i386nbsd-tdep.c (i386nbsd_sc_pc_offset, i386nbsd_sc_sp_offset): Remove variables. (i386nbsd_sc_reg_offset): New variable. (i386nbsd_init_abi): Initialize TDEP->sc_reg_offset and TDEP->sc_num_regs instead of TDEP->sc_pc_offset and TDEP->sc_sp_offset. * i386obsd-tdep.c (i386obsd_sc_pc_offset, i386obsd_sc_sp_offset): Remove variables. (i386obsd_sc_reg_offset): New variable. (i386obsd_init_abi): Initialize TDEP->sc_reg_offset and TDEP->sc_num_regs instead of TDEP->sc_pc_offset and TDEP->sc_sp_offset. * i386bsd-nat.c (_initialize_i386bsd_nat): Adjust for changes in i386bsd-tdep.c, i386nbsd-tdep.c and i386obsd-tdep.c. Add check for frame pointer offset in `struct sigcontext'.
140 lines
3.7 KiB
C
140 lines
3.7 KiB
C
/* Target-dependent code for OpenBSD/i386.
|
||
Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002, 2003
|
||
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 2 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, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
#include "defs.h"
|
||
#include "arch-utils.h"
|
||
#include "gdbcore.h"
|
||
#include "regcache.h"
|
||
#include "osabi.h"
|
||
|
||
#include "i386-tdep.h"
|
||
#include "i387-tdep.h"
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
void _initialize_i386obsd_tdep (void);
|
||
|
||
#define SIZEOF_STRUCT_REG (16 * 4)
|
||
|
||
static void
|
||
i386obsd_supply_reg (char *regs, int regno)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i <= 15; i++)
|
||
if (regno == i || regno == -1)
|
||
supply_register (i, regs + i * 4);
|
||
}
|
||
|
||
static void
|
||
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
|
||
CORE_ADDR ignore)
|
||
{
|
||
char *regs, *fsave;
|
||
|
||
/* We get everything from one section. */
|
||
if (which != 0)
|
||
return;
|
||
|
||
if (core_reg_size < (SIZEOF_STRUCT_REG + 108))
|
||
{
|
||
warning ("Wrong size register set in core file.");
|
||
return;
|
||
}
|
||
|
||
regs = core_reg_sect;
|
||
fsave = core_reg_sect + SIZEOF_STRUCT_REG;
|
||
|
||
/* Integer registers. */
|
||
i386obsd_supply_reg (regs, -1);
|
||
|
||
/* Floating point registers. */
|
||
i387_supply_fsave (fsave);
|
||
}
|
||
|
||
static struct core_fns i386obsd_core_fns =
|
||
{
|
||
bfd_target_unknown_flavour, /* core_flavour */
|
||
default_check_format, /* check_format */
|
||
default_core_sniffer, /* core_sniffer */
|
||
fetch_core_registers, /* core_read_registers */
|
||
NULL /* next */
|
||
};
|
||
|
||
|
||
CORE_ADDR i386obsd_sigtramp_start = 0xbfbfdf20;
|
||
CORE_ADDR i386obsd_sigtramp_end = 0xbfbfdff0;
|
||
|
||
/* From <machine/signal.h>. */
|
||
int i386obsd_sc_reg_offset[I386_NUM_GREGS] =
|
||
{
|
||
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 */
|
||
};
|
||
|
||
static void
|
||
i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
/* Obviously OpenBSD is BSD-based. */
|
||
i386bsd_init_abi (info, gdbarch);
|
||
|
||
/* OpenBSD uses -freg-struct-return by default. */
|
||
tdep->struct_return = reg_struct_return;
|
||
|
||
/* OpenBSD uses a different memory layout. */
|
||
tdep->sigtramp_start = i386obsd_sigtramp_start;
|
||
tdep->sigtramp_end = i386obsd_sigtramp_end;
|
||
|
||
/* OpenBSD has a `struct sigcontext' that's different from the
|
||
origional 4.3 BSD. */
|
||
tdep->sc_reg_offset = i386obsd_sc_reg_offset;
|
||
tdep->sc_num_regs = I386_NUM_GREGS;
|
||
}
|
||
|
||
void
|
||
_initialize_i386obsd_tdep (void)
|
||
{
|
||
add_core_fns (&i386obsd_core_fns);
|
||
|
||
/* FIXME: kettenis/20021020: Since OpenBSD/i386 binaries are
|
||
indistingushable from NetBSD/i386 a.out binaries, building a GDB
|
||
that should support both these targets will probably not work as
|
||
expected. */
|
||
#define GDB_OSABI_OPENBSD_AOUT GDB_OSABI_NETBSD_AOUT
|
||
|
||
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_OPENBSD_AOUT,
|
||
i386obsd_init_abi);
|
||
}
|