1 /* Target-dependent code for FreeBSD/amd64.
3 Copyright 2003, 2004 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include "arch-utils.h"
29 #include "gdb_string.h"
31 #include "x86-64-tdep.h"
33 /* Support for signal handlers. */
35 /* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
36 routine, return the address of the associated sigcontext structure. */
39 amd64fbsd_sigcontext_addr (struct frame_info
*next_frame
)
43 /* The `struct sigcontext' (which really is an `ucontext_t' on
44 FreeBSD/amd64) lives at a fixed offset in the signal frame. See
45 <machine/sigframe.h>. */
46 sp
= frame_unwind_register_unsigned (next_frame
, X86_64_RSP_REGNUM
);
50 /* FreeBSD 5.1-RELEASE or later. */
52 /* Mapping between the general-purpose registers in `struct reg'
53 format and GDB's register cache layout.
55 Note that some registers are 32-bit, but since we're little-endian
56 we get away with that. */
58 /* From <machine/reg.h>. */
59 static int amd64fbsd_r_reg_offset
[] =
87 /* Location of the signal trampoline. */
88 CORE_ADDR amd64fbsd_sigtramp_start
= 0x7fffffffffc0;
89 CORE_ADDR amd64fbsd_sigtramp_end
= 0x7fffffffffe0;
91 /* From <machine/signal.h>. */
92 int amd64fbsd_sc_reg_offset
[] =
94 24 + 6 * 8, /* %rax */
95 24 + 7 * 8, /* %rbx */
96 24 + 3 * 8, /* %rcx */
97 24 + 2 * 8, /* %rdx */
98 24 + 1 * 8, /* %rsi */
99 24 + 0 * 8, /* %rdi */
100 24 + 8 * 8, /* %rbp */
101 24 + 22 * 8, /* %rsp */
102 24 + 4 * 8, /* %r8 ... */
109 24 + 14 * 8, /* ... %r15 */
110 24 + 19 * 8, /* %rip */
111 24 + 21 * 8, /* %eflags */
112 24 + 20 * 8, /* %cs */
113 24 + 23 * 8, /* %ss */
121 amd64fbsd_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
123 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
125 /* Obviously FreeBSD is BSD-based. */
126 i386bsd_init_abi (info
, gdbarch
);
128 tdep
->gregset_reg_offset
= amd64fbsd_r_reg_offset
;
129 tdep
->gregset_num_regs
= ARRAY_SIZE (amd64fbsd_r_reg_offset
);
130 tdep
->sizeof_gregset
= 22 * 8;
132 x86_64_init_abi (info
, gdbarch
);
134 tdep
->sigtramp_start
= amd64fbsd_sigtramp_start
;
135 tdep
->sigtramp_end
= amd64fbsd_sigtramp_end
;
136 tdep
->sigcontext_addr
= amd64fbsd_sigcontext_addr
;
137 tdep
->sc_reg_offset
= amd64fbsd_sc_reg_offset
;
138 tdep
->sc_num_regs
= ARRAY_SIZE (amd64fbsd_sc_reg_offset
);
142 /* Provide a prototype to silence -Wmissing-prototypes. */
143 void _initialize_amd64fbsd_tdep (void);
146 _initialize_amd64fbsd_tdep (void)
148 gdbarch_register_osabi (bfd_arch_i386
, bfd_mach_x86_64
,
149 GDB_OSABI_FREEBSD_ELF
, amd64fbsd_init_abi
);