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/* Target-dependent code for FreeBSD/amd64.
Copyright 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 "frame.h"
#include "gdbcore.h"
#include "regcache.h"
#include "osabi.h"
#include "gdb_string.h"
#include "x86-64-tdep.h"
/* Support for signal handlers. */
/* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
routine, return the address of the associated sigcontext structure. */
static CORE_ADDR
amd64fbsd_sigcontext_addr (struct frame_info *next_frame)
{
char buf[8];
CORE_ADDR sp;
frame_unwind_register (next_frame, X86_64_RSP_REGNUM, buf);
sp = extract_unsigned_integer (buf, 8);
return read_memory_unsigned_integer (sp + 16, 8);
}
/* FreeBSD 5.1-RELEASE or later. */
/* Location of the signal trampoline. */
CORE_ADDR amd64fbsd_sigtramp_start = 0x7fffffffc0;
CORE_ADDR amd64fbsd_sigtramp_end = 0x7fffffffe0;
/* From <machine/signal.h>. */
int amd64fbsd_sc_reg_offset[X86_64_NUM_GREGS] =
{
24 + 14 * 8, /* %rax */
24 + 11 * 8, /* %rbx */
24 + 13 * 8, /* %rcx */
24 + 12 * 8, /* %rdx */
24 + 9 * 8, /* %rsi */
24 + 8 * 8, /* %rdi */
24 + 10 * 8, /* %rbp */
24 + 20 * 8, /* %rsp */
24 + 7 * 8, /* %r8 */
24 + 6 * 8, /* %r9 */
24 + 5 * 8, /* %r10 */
24 + 4 * 8, /* %r11 */
24 + 3 * 8, /* %r12 */
24 + 2 * 8, /* %r13 */
24 + 1 * 8, /* %r14 */
24 + 0 * 8, /* %r15 */
24 + 17 * 8, /* %rip */
24 + 19 * 8, /* %eflags */
-1, /* %ds */
-1, /* %es */
-1, /* %fs */
-1 /* %gs */
};
void
amd64fbsd_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);
x86_64_init_abi (info, gdbarch);
tdep->sigtramp_start = amd64fbsd_sigtramp_start;
tdep->sigtramp_end = amd64fbsd_sigtramp_start;
tdep->sigcontext_addr = amd64fbsd_sigcontext_addr;
tdep->sc_reg_offset = amd64fbsd_sc_reg_offset;
tdep->sc_num_regs = X86_64_NUM_GREGS;
}
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_amd64fbsd_tdep (void);
void
_initialize_amd64fbsd_tdep (void)
{
gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
GDB_OSABI_FREEBSD_ELF, amd64fbsd_init_abi);
}
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