1*b725ae77Skettenis /* Target-dependent code for FreeBSD/amd64.
2*b725ae77Skettenis
3*b725ae77Skettenis Copyright 2003, 2004 Free Software Foundation, Inc.
4*b725ae77Skettenis
5*b725ae77Skettenis This file is part of GDB.
6*b725ae77Skettenis
7*b725ae77Skettenis This program is free software; you can redistribute it and/or modify
8*b725ae77Skettenis it under the terms of the GNU General Public License as published by
9*b725ae77Skettenis the Free Software Foundation; either version 2 of the License, or
10*b725ae77Skettenis (at your option) any later version.
11*b725ae77Skettenis
12*b725ae77Skettenis This program is distributed in the hope that it will be useful,
13*b725ae77Skettenis but WITHOUT ANY WARRANTY; without even the implied warranty of
14*b725ae77Skettenis MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15*b725ae77Skettenis GNU General Public License for more details.
16*b725ae77Skettenis
17*b725ae77Skettenis You should have received a copy of the GNU General Public License
18*b725ae77Skettenis along with this program; if not, write to the Free Software
19*b725ae77Skettenis Foundation, Inc., 59 Temple Place - Suite 330,
20*b725ae77Skettenis Boston, MA 02111-1307, USA. */
21*b725ae77Skettenis
22*b725ae77Skettenis #include "defs.h"
23*b725ae77Skettenis #include "arch-utils.h"
24*b725ae77Skettenis #include "frame.h"
25*b725ae77Skettenis #include "gdbcore.h"
26*b725ae77Skettenis #include "regcache.h"
27*b725ae77Skettenis #include "osabi.h"
28*b725ae77Skettenis
29*b725ae77Skettenis #include "gdb_string.h"
30*b725ae77Skettenis
31*b725ae77Skettenis #include "amd64-tdep.h"
32*b725ae77Skettenis #include "solib-svr4.h"
33*b725ae77Skettenis
34*b725ae77Skettenis /* Support for signal handlers. */
35*b725ae77Skettenis
36*b725ae77Skettenis /* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
37*b725ae77Skettenis routine, return the address of the associated sigcontext structure. */
38*b725ae77Skettenis
39*b725ae77Skettenis static CORE_ADDR
amd64fbsd_sigcontext_addr(struct frame_info * next_frame)40*b725ae77Skettenis amd64fbsd_sigcontext_addr (struct frame_info *next_frame)
41*b725ae77Skettenis {
42*b725ae77Skettenis CORE_ADDR sp;
43*b725ae77Skettenis
44*b725ae77Skettenis /* The `struct sigcontext' (which really is an `ucontext_t' on
45*b725ae77Skettenis FreeBSD/amd64) lives at a fixed offset in the signal frame. See
46*b725ae77Skettenis <machine/sigframe.h>. */
47*b725ae77Skettenis sp = frame_unwind_register_unsigned (next_frame, AMD64_RSP_REGNUM);
48*b725ae77Skettenis return sp + 16;
49*b725ae77Skettenis }
50*b725ae77Skettenis
51*b725ae77Skettenis /* FreeBSD 5.1-RELEASE or later. */
52*b725ae77Skettenis
53*b725ae77Skettenis /* Mapping between the general-purpose registers in `struct reg'
54*b725ae77Skettenis format and GDB's register cache layout.
55*b725ae77Skettenis
56*b725ae77Skettenis Note that some registers are 32-bit, but since we're little-endian
57*b725ae77Skettenis we get away with that. */
58*b725ae77Skettenis
59*b725ae77Skettenis /* From <machine/reg.h>. */
60*b725ae77Skettenis static int amd64fbsd_r_reg_offset[] =
61*b725ae77Skettenis {
62*b725ae77Skettenis 14 * 8, /* %rax */
63*b725ae77Skettenis 11 * 8, /* %rbx */
64*b725ae77Skettenis 13 * 8, /* %rcx */
65*b725ae77Skettenis 12 * 8, /* %rdx */
66*b725ae77Skettenis 9 * 8, /* %rsi */
67*b725ae77Skettenis 8 * 8, /* %rdi */
68*b725ae77Skettenis 10 * 8, /* %rbp */
69*b725ae77Skettenis 20 * 8, /* %rsp */
70*b725ae77Skettenis 7 * 8, /* %r8 ... */
71*b725ae77Skettenis 6 * 8,
72*b725ae77Skettenis 5 * 8,
73*b725ae77Skettenis 4 * 8,
74*b725ae77Skettenis 3 * 8,
75*b725ae77Skettenis 2 * 8,
76*b725ae77Skettenis 1 * 8,
77*b725ae77Skettenis 0 * 8, /* ... %r15 */
78*b725ae77Skettenis 17 * 8, /* %rip */
79*b725ae77Skettenis 19 * 8, /* %eflags */
80*b725ae77Skettenis 18 * 8, /* %cs */
81*b725ae77Skettenis 21 * 8, /* %ss */
82*b725ae77Skettenis -1, /* %ds */
83*b725ae77Skettenis -1, /* %es */
84*b725ae77Skettenis -1, /* %fs */
85*b725ae77Skettenis -1 /* %gs */
86*b725ae77Skettenis };
87*b725ae77Skettenis
88*b725ae77Skettenis /* Location of the signal trampoline. */
89*b725ae77Skettenis CORE_ADDR amd64fbsd_sigtramp_start_addr = 0x7fffffffffc0;
90*b725ae77Skettenis CORE_ADDR amd64fbsd_sigtramp_end_addr = 0x7fffffffffe0;
91*b725ae77Skettenis
92*b725ae77Skettenis /* From <machine/signal.h>. */
93*b725ae77Skettenis int amd64fbsd_sc_reg_offset[] =
94*b725ae77Skettenis {
95*b725ae77Skettenis 24 + 6 * 8, /* %rax */
96*b725ae77Skettenis 24 + 7 * 8, /* %rbx */
97*b725ae77Skettenis 24 + 3 * 8, /* %rcx */
98*b725ae77Skettenis 24 + 2 * 8, /* %rdx */
99*b725ae77Skettenis 24 + 1 * 8, /* %rsi */
100*b725ae77Skettenis 24 + 0 * 8, /* %rdi */
101*b725ae77Skettenis 24 + 8 * 8, /* %rbp */
102*b725ae77Skettenis 24 + 22 * 8, /* %rsp */
103*b725ae77Skettenis 24 + 4 * 8, /* %r8 ... */
104*b725ae77Skettenis 24 + 5 * 8,
105*b725ae77Skettenis 24 + 9 * 8,
106*b725ae77Skettenis 24 + 10 * 8,
107*b725ae77Skettenis 24 + 11 * 8,
108*b725ae77Skettenis 24 + 12 * 8,
109*b725ae77Skettenis 24 + 13 * 8,
110*b725ae77Skettenis 24 + 14 * 8, /* ... %r15 */
111*b725ae77Skettenis 24 + 19 * 8, /* %rip */
112*b725ae77Skettenis 24 + 21 * 8, /* %eflags */
113*b725ae77Skettenis 24 + 20 * 8, /* %cs */
114*b725ae77Skettenis 24 + 23 * 8, /* %ss */
115*b725ae77Skettenis -1, /* %ds */
116*b725ae77Skettenis -1, /* %es */
117*b725ae77Skettenis -1, /* %fs */
118*b725ae77Skettenis -1 /* %gs */
119*b725ae77Skettenis };
120*b725ae77Skettenis
121*b725ae77Skettenis void
amd64fbsd_init_abi(struct gdbarch_info info,struct gdbarch * gdbarch)122*b725ae77Skettenis amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
123*b725ae77Skettenis {
124*b725ae77Skettenis struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
125*b725ae77Skettenis
126*b725ae77Skettenis /* Obviously FreeBSD is BSD-based. */
127*b725ae77Skettenis i386bsd_init_abi (info, gdbarch);
128*b725ae77Skettenis
129*b725ae77Skettenis tdep->gregset_reg_offset = amd64fbsd_r_reg_offset;
130*b725ae77Skettenis tdep->gregset_num_regs = ARRAY_SIZE (amd64fbsd_r_reg_offset);
131*b725ae77Skettenis tdep->sizeof_gregset = 22 * 8;
132*b725ae77Skettenis
133*b725ae77Skettenis amd64_init_abi (info, gdbarch);
134*b725ae77Skettenis
135*b725ae77Skettenis tdep->sigtramp_start = amd64fbsd_sigtramp_start_addr;
136*b725ae77Skettenis tdep->sigtramp_end = amd64fbsd_sigtramp_end_addr;
137*b725ae77Skettenis tdep->sigcontext_addr = amd64fbsd_sigcontext_addr;
138*b725ae77Skettenis tdep->sc_reg_offset = amd64fbsd_sc_reg_offset;
139*b725ae77Skettenis tdep->sc_num_regs = ARRAY_SIZE (amd64fbsd_sc_reg_offset);
140*b725ae77Skettenis
141*b725ae77Skettenis /* FreeBSD uses SVR4-style shared libraries. */
142*b725ae77Skettenis set_solib_svr4_fetch_link_map_offsets
143*b725ae77Skettenis (gdbarch, svr4_lp64_fetch_link_map_offsets);
144*b725ae77Skettenis }
145*b725ae77Skettenis
146*b725ae77Skettenis
147*b725ae77Skettenis /* Provide a prototype to silence -Wmissing-prototypes. */
148*b725ae77Skettenis void _initialize_amd64fbsd_tdep (void);
149*b725ae77Skettenis
150*b725ae77Skettenis void
_initialize_amd64fbsd_tdep(void)151*b725ae77Skettenis _initialize_amd64fbsd_tdep (void)
152*b725ae77Skettenis {
153*b725ae77Skettenis gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
154*b725ae77Skettenis GDB_OSABI_FREEBSD_ELF, amd64fbsd_init_abi);
155*b725ae77Skettenis }
156