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/* 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 (current_regcache, -1, 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);
}
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