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68cc0bfb | 1 | /* Target-dependent code for FreeBSD/amd64. |
477f40d1 | 2 | |
ecd75fc8 | 3 | Copyright (C) 2003-2014 Free Software Foundation, Inc. |
68cc0bfb MK |
4 | |
5 | This file is part of GDB. | |
6 | ||
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
68cc0bfb MK |
10 | (at your option) any later version. |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
68cc0bfb MK |
19 | |
20 | #include "defs.h" | |
21 | #include "arch-utils.h" | |
22 | #include "frame.h" | |
23 | #include "gdbcore.h" | |
24 | #include "regcache.h" | |
25 | #include "osabi.h" | |
26 | ||
85be1ca6 | 27 | #include "amd64-tdep.h" |
1c02b2a5 | 28 | #include "bsd-uthread.h" |
7e654c37 | 29 | #include "solib-svr4.h" |
68cc0bfb MK |
30 | |
31 | /* Support for signal handlers. */ | |
32 | ||
10458914 DJ |
33 | /* Assuming THIS_FRAME is for a BSD sigtramp routine, return the |
34 | address of the associated sigcontext structure. */ | |
68cc0bfb MK |
35 | |
36 | static CORE_ADDR | |
10458914 | 37 | amd64fbsd_sigcontext_addr (struct frame_info *this_frame) |
68cc0bfb | 38 | { |
68cc0bfb MK |
39 | CORE_ADDR sp; |
40 | ||
212c460c MK |
41 | /* The `struct sigcontext' (which really is an `ucontext_t' on |
42 | FreeBSD/amd64) lives at a fixed offset in the signal frame. See | |
43 | <machine/sigframe.h>. */ | |
10458914 | 44 | sp = frame_unwind_register_unsigned (this_frame, AMD64_RSP_REGNUM); |
212c460c | 45 | return sp + 16; |
68cc0bfb MK |
46 | } |
47 | \f | |
48 | /* FreeBSD 5.1-RELEASE or later. */ | |
49 | ||
477f40d1 MK |
50 | /* Mapping between the general-purpose registers in `struct reg' |
51 | format and GDB's register cache layout. | |
52 | ||
53 | Note that some registers are 32-bit, but since we're little-endian | |
54 | we get away with that. */ | |
55 | ||
56 | /* From <machine/reg.h>. */ | |
57 | static int amd64fbsd_r_reg_offset[] = | |
58 | { | |
af233647 MK |
59 | 14 * 8, /* %rax */ |
60 | 11 * 8, /* %rbx */ | |
61 | 13 * 8, /* %rcx */ | |
62 | 12 * 8, /* %rdx */ | |
63 | 9 * 8, /* %rsi */ | |
64 | 8 * 8, /* %rdi */ | |
65 | 10 * 8, /* %rbp */ | |
66 | 20 * 8, /* %rsp */ | |
0963b4bd | 67 | 7 * 8, /* %r8 ... */ |
af233647 MK |
68 | 6 * 8, |
69 | 5 * 8, | |
70 | 4 * 8, | |
71 | 3 * 8, | |
72 | 2 * 8, | |
73 | 1 * 8, | |
74 | 0 * 8, /* ... %r15 */ | |
75 | 17 * 8, /* %rip */ | |
76 | 19 * 8, /* %eflags */ | |
77 | 18 * 8, /* %cs */ | |
78 | 21 * 8, /* %ss */ | |
79 | -1, /* %ds */ | |
80 | -1, /* %es */ | |
81 | -1, /* %fs */ | |
82 | -1 /* %gs */ | |
477f40d1 MK |
83 | }; |
84 | ||
68cc0bfb | 85 | /* Location of the signal trampoline. */ |
ec20a626 UW |
86 | CORE_ADDR amd64fbsd_sigtramp_start_addr = 0x7fffffffffc0ULL; |
87 | CORE_ADDR amd64fbsd_sigtramp_end_addr = 0x7fffffffffe0ULL; | |
68cc0bfb MK |
88 | |
89 | /* From <machine/signal.h>. */ | |
af233647 | 90 | int amd64fbsd_sc_reg_offset[] = |
68cc0bfb | 91 | { |
212c460c MK |
92 | 24 + 6 * 8, /* %rax */ |
93 | 24 + 7 * 8, /* %rbx */ | |
94 | 24 + 3 * 8, /* %rcx */ | |
95 | 24 + 2 * 8, /* %rdx */ | |
96 | 24 + 1 * 8, /* %rsi */ | |
97 | 24 + 0 * 8, /* %rdi */ | |
98 | 24 + 8 * 8, /* %rbp */ | |
dac94105 | 99 | 24 + 22 * 8, /* %rsp */ |
0963b4bd | 100 | 24 + 4 * 8, /* %r8 ... */ |
af233647 MK |
101 | 24 + 5 * 8, |
102 | 24 + 9 * 8, | |
103 | 24 + 10 * 8, | |
104 | 24 + 11 * 8, | |
105 | 24 + 12 * 8, | |
106 | 24 + 13 * 8, | |
107 | 24 + 14 * 8, /* ... %r15 */ | |
dac94105 MK |
108 | 24 + 19 * 8, /* %rip */ |
109 | 24 + 21 * 8, /* %eflags */ | |
af233647 MK |
110 | 24 + 20 * 8, /* %cs */ |
111 | 24 + 23 * 8, /* %ss */ | |
68cc0bfb MK |
112 | -1, /* %ds */ |
113 | -1, /* %es */ | |
114 | -1, /* %fs */ | |
115 | -1 /* %gs */ | |
116 | }; | |
117 | ||
1c02b2a5 MK |
118 | /* From /usr/src/lib/libc/amd64/gen/_setjmp.S. */ |
119 | static int amd64fbsd_jmp_buf_reg_offset[] = | |
120 | { | |
121 | -1, /* %rax */ | |
122 | 1 * 8, /* %rbx */ | |
123 | -1, /* %rcx */ | |
124 | -1, /* %rdx */ | |
125 | -1, /* %rsi */ | |
126 | -1, /* %rdi */ | |
127 | 3 * 8, /* %rbp */ | |
128 | 2 * 8, /* %rsp */ | |
0963b4bd | 129 | -1, /* %r8 ... */ |
1c02b2a5 MK |
130 | -1, |
131 | -1, | |
132 | -1, /* ... %r11 */ | |
0963b4bd | 133 | 4 * 8, /* %r12 ... */ |
1c02b2a5 MK |
134 | 5 * 8, |
135 | 6 * 8, | |
136 | 7 * 8, /* ... %r15 */ | |
137 | 0 * 8 /* %rip */ | |
138 | }; | |
139 | ||
140 | static void | |
141 | amd64fbsd_supply_uthread (struct regcache *regcache, | |
142 | int regnum, CORE_ADDR addr) | |
143 | { | |
4252dc94 | 144 | gdb_byte buf[8]; |
1c02b2a5 MK |
145 | int i; |
146 | ||
147 | gdb_assert (regnum >= -1); | |
148 | ||
149 | for (i = 0; i < ARRAY_SIZE (amd64fbsd_jmp_buf_reg_offset); i++) | |
150 | { | |
151 | if (amd64fbsd_jmp_buf_reg_offset[i] != -1 | |
152 | && (regnum == -1 || regnum == i)) | |
153 | { | |
154 | read_memory (addr + amd64fbsd_jmp_buf_reg_offset[i], buf, 8); | |
155 | regcache_raw_supply (regcache, i, buf); | |
156 | } | |
157 | } | |
158 | } | |
159 | ||
160 | static void | |
161 | amd64fbsd_collect_uthread (const struct regcache *regcache, | |
162 | int regnum, CORE_ADDR addr) | |
163 | { | |
4252dc94 | 164 | gdb_byte buf[8]; |
1c02b2a5 MK |
165 | int i; |
166 | ||
167 | gdb_assert (regnum >= -1); | |
168 | ||
169 | for (i = 0; i < ARRAY_SIZE (amd64fbsd_jmp_buf_reg_offset); i++) | |
170 | { | |
171 | if (amd64fbsd_jmp_buf_reg_offset[i] != -1 | |
172 | && (regnum == -1 || regnum == i)) | |
173 | { | |
174 | regcache_raw_collect (regcache, i, buf); | |
175 | write_memory (addr + amd64fbsd_jmp_buf_reg_offset[i], buf, 8); | |
176 | } | |
177 | } | |
178 | } | |
179 | ||
63807e1d | 180 | static void |
68cc0bfb MK |
181 | amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
182 | { | |
183 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
184 | ||
185 | /* Obviously FreeBSD is BSD-based. */ | |
186 | i386bsd_init_abi (info, gdbarch); | |
187 | ||
477f40d1 MK |
188 | tdep->gregset_reg_offset = amd64fbsd_r_reg_offset; |
189 | tdep->gregset_num_regs = ARRAY_SIZE (amd64fbsd_r_reg_offset); | |
190 | tdep->sizeof_gregset = 22 * 8; | |
191 | ||
90f90721 | 192 | amd64_init_abi (info, gdbarch); |
68cc0bfb | 193 | |
10fc94a4 MK |
194 | tdep->sigtramp_start = amd64fbsd_sigtramp_start_addr; |
195 | tdep->sigtramp_end = amd64fbsd_sigtramp_end_addr; | |
68cc0bfb MK |
196 | tdep->sigcontext_addr = amd64fbsd_sigcontext_addr; |
197 | tdep->sc_reg_offset = amd64fbsd_sc_reg_offset; | |
477f40d1 | 198 | tdep->sc_num_regs = ARRAY_SIZE (amd64fbsd_sc_reg_offset); |
7e654c37 | 199 | |
1c02b2a5 MK |
200 | /* FreeBSD provides a user-level threads implementation. */ |
201 | bsd_uthread_set_supply_uthread (gdbarch, amd64fbsd_supply_uthread); | |
202 | bsd_uthread_set_collect_uthread (gdbarch, amd64fbsd_collect_uthread); | |
203 | ||
7e654c37 MK |
204 | /* FreeBSD uses SVR4-style shared libraries. */ |
205 | set_solib_svr4_fetch_link_map_offsets | |
206 | (gdbarch, svr4_lp64_fetch_link_map_offsets); | |
68cc0bfb MK |
207 | } |
208 | \f | |
209 | ||
210 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
211 | void _initialize_amd64fbsd_tdep (void); | |
212 | ||
213 | void | |
214 | _initialize_amd64fbsd_tdep (void) | |
215 | { | |
216 | gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, | |
217 | GDB_OSABI_FREEBSD_ELF, amd64fbsd_init_abi); | |
218 | } |