125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/* Target-dependent code for i386 BSD's.
|
||
|
||
Copyright (C) 2001, 2002, 2003, 2004, 2007, 2008
|
||
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 "osabi.h"
|
||
|
||
#include "gdb_string.h"
|
||
|
||
#include "i386-tdep.h"
|
||
|
||
/* Support for signal handlers. */
|
||
|
||
/* Assuming THIS_FRAME is for a BSD sigtramp routine, return the
|
||
address of the associated sigcontext structure. */
|
||
|
||
static CORE_ADDR
|
||
i386bsd_sigcontext_addr (struct frame_info *this_frame)
|
||
{
|
||
gdb_byte buf[4];
|
||
CORE_ADDR sp;
|
||
|
||
get_frame_register (this_frame, I386_ESP_REGNUM, buf);
|
||
sp = extract_unsigned_integer (buf, 4);
|
||
|
||
return read_memory_unsigned_integer (sp + 8, 4);
|
||
}
|
||
|
||
|
||
/* Support for shared libraries. */
|
||
|
||
/* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD). */
|
||
|
||
/* From <machine/signal.h>. */
|
||
int i386bsd_sc_reg_offset[] =
|
||
{
|
||
-1, /* %eax */
|
||
-1, /* %ecx */
|
||
-1, /* %edx */
|
||
-1, /* %ebx */
|
||
8 + 0 * 4, /* %esp */
|
||
8 + 1 * 4, /* %ebp */
|
||
-1, /* %esi */
|
||
-1, /* %edi */
|
||
8 + 3 * 4, /* %eip */
|
||
8 + 4 * 4, /* %eflags */
|
||
-1, /* %cs */
|
||
-1, /* %ss */
|
||
-1, /* %ds */
|
||
-1, /* %es */
|
||
-1, /* %fs */
|
||
-1 /* %gs */
|
||
};
|
||
|
||
void
|
||
i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
tdep->jb_pc_offset = 0;
|
||
|
||
tdep->sigtramp_start = 0xfdbfdfc0;
|
||
tdep->sigtramp_end = 0xfdbfe000;
|
||
tdep->sigcontext_addr = i386bsd_sigcontext_addr;
|
||
tdep->sc_reg_offset = i386bsd_sc_reg_offset;
|
||
tdep->sc_num_regs = ARRAY_SIZE (i386bsd_sc_reg_offset);
|
||
}
|
||
|
||
|
||
static enum gdb_osabi
|
||
i386bsd_aout_osabi_sniffer (bfd *abfd)
|
||
{
|
||
if (strcmp (bfd_get_target (abfd), "a.out-i386-netbsd") == 0)
|
||
return GDB_OSABI_NETBSD_AOUT;
|
||
|
||
if (strcmp (bfd_get_target (abfd), "a.out-i386-freebsd") == 0)
|
||
return GDB_OSABI_FREEBSD_AOUT;
|
||
|
||
return GDB_OSABI_UNKNOWN;
|
||
}
|
||
|
||
static enum gdb_osabi
|
||
i386bsd_core_osabi_sniffer (bfd *abfd)
|
||
{
|
||
if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
|
||
return GDB_OSABI_NETBSD_AOUT;
|
||
|
||
return GDB_OSABI_UNKNOWN;
|
||
}
|
||
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
void _initialize_i386bsd_tdep (void);
|
||
|
||
void
|
||
_initialize_i386bsd_tdep (void)
|
||
{
|
||
gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_aout_flavour,
|
||
i386bsd_aout_osabi_sniffer);
|
||
|
||
/* BFD doesn't set a flavour for NetBSD style a.out core files. */
|
||
gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_unknown_flavour,
|
||
i386bsd_core_osabi_sniffer);
|
||
}
|