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58caa3dc DJ |
1 | /* GNU/Linux/x86-64 specific low level interface, for the remote server |
2 | for GDB. | |
0fb0cc75 | 3 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009 |
9b254dd1 | 4 | Free Software Foundation, Inc. |
58caa3dc DJ |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
58caa3dc DJ |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
58caa3dc DJ |
20 | |
21 | #include "server.h" | |
22 | #include "linux-low.h" | |
23 | #include "i387-fp.h" | |
24 | ||
0050a760 | 25 | #include "gdb_proc_service.h" |
fd500816 | 26 | |
d05b4ac3 UW |
27 | /* Defined in auto-generated file reg-x86-64-linux.c. */ |
28 | void init_registers_x86_64_linux (void); | |
29 | ||
58caa3dc DJ |
30 | #include <sys/reg.h> |
31 | #include <sys/procfs.h> | |
32 | #include <sys/ptrace.h> | |
33 | ||
fd500816 DJ |
34 | /* This definition comes from prctl.h, but some kernels may not have it. */ |
35 | #ifndef PTRACE_ARCH_PRCTL | |
36 | #define PTRACE_ARCH_PRCTL 30 | |
37 | #endif | |
38 | ||
43360365 JB |
39 | /* The following definitions come from prctl.h, but may be absent |
40 | for certain configurations. */ | |
41 | #ifndef ARCH_GET_FS | |
42 | #define ARCH_SET_GS 0x1001 | |
43 | #define ARCH_SET_FS 0x1002 | |
44 | #define ARCH_GET_FS 0x1003 | |
45 | #define ARCH_GET_GS 0x1004 | |
46 | #endif | |
47 | ||
09ec9b38 | 48 | static int x86_64_regmap[] = { |
638c1580 ML |
49 | RAX * 8, RBX * 8, RCX * 8, RDX * 8, |
50 | RSI * 8, RDI * 8, RBP * 8, RSP * 8, | |
51 | R8 * 8, R9 * 8, R10 * 8, R11 * 8, | |
52 | R12 * 8, R13 * 8, R14 * 8, R15 * 8, | |
1b3f6016 | 53 | RIP * 8, EFLAGS * 8, CS * 8, SS * 8, |
8695c747 DJ |
54 | DS * 8, ES * 8, FS * 8, GS * 8, |
55 | -1, -1, -1, -1, -1, -1, -1, -1, | |
56 | -1, -1, -1, -1, -1, -1, -1, -1, | |
57 | -1, -1, -1, -1, -1, -1, -1, -1, | |
58 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
59 | ORIG_RAX * 8 | |
58caa3dc DJ |
60 | }; |
61 | ||
09ec9b38 ML |
62 | #define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int)) |
63 | ||
fd500816 DJ |
64 | /* Called by libthread_db. */ |
65 | ||
66 | ps_err_e | |
67 | ps_get_thread_area (const struct ps_prochandle *ph, | |
1b3f6016 | 68 | lwpid_t lwpid, int idx, void **base) |
fd500816 DJ |
69 | { |
70 | switch (idx) | |
71 | { | |
72 | case FS: | |
73 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) | |
74 | return PS_OK; | |
75 | break; | |
76 | case GS: | |
77 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) | |
78 | return PS_OK; | |
79 | break; | |
80 | default: | |
81 | return PS_BADADDR; | |
82 | } | |
83 | return PS_ERR; | |
84 | } | |
85 | ||
58caa3dc DJ |
86 | static void |
87 | x86_64_fill_gregset (void *buf) | |
88 | { | |
89 | int i; | |
90 | ||
de220d0f | 91 | for (i = 0; i < X86_64_NUM_GREGS; i++) |
8695c747 DJ |
92 | if (x86_64_regmap[i] != -1) |
93 | collect_register (i, ((char *) buf) + x86_64_regmap[i]); | |
58caa3dc DJ |
94 | } |
95 | ||
96 | static void | |
638c1580 | 97 | x86_64_store_gregset (const void *buf) |
58caa3dc DJ |
98 | { |
99 | int i; | |
100 | ||
de220d0f | 101 | for (i = 0; i < X86_64_NUM_GREGS; i++) |
8695c747 DJ |
102 | if (x86_64_regmap[i] != -1) |
103 | supply_register (i, ((char *) buf) + x86_64_regmap[i]); | |
58caa3dc DJ |
104 | } |
105 | ||
106 | static void | |
107 | x86_64_fill_fpregset (void *buf) | |
108 | { | |
109 | i387_cache_to_fxsave (buf); | |
110 | } | |
111 | ||
112 | static void | |
638c1580 | 113 | x86_64_store_fpregset (const void *buf) |
58caa3dc DJ |
114 | { |
115 | i387_fxsave_to_cache (buf); | |
116 | } | |
117 | ||
58caa3dc DJ |
118 | struct regset_info target_regsets[] = { |
119 | { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t), | |
0d62e5e8 | 120 | GENERAL_REGS, |
58caa3dc DJ |
121 | x86_64_fill_gregset, x86_64_store_gregset }, |
122 | { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t), | |
0d62e5e8 | 123 | FP_REGS, |
58caa3dc | 124 | x86_64_fill_fpregset, x86_64_store_fpregset }, |
0d62e5e8 | 125 | { 0, 0, -1, -1, NULL, NULL } |
58caa3dc | 126 | }; |
2ec06d2e | 127 | |
011a70c2 DJ |
128 | static const unsigned char x86_64_breakpoint[] = { 0xCC }; |
129 | #define x86_64_breakpoint_len 1 | |
1b3f6016 | 130 | |
011a70c2 DJ |
131 | extern int debug_threads; |
132 | ||
133 | static CORE_ADDR | |
134 | x86_64_get_pc () | |
135 | { | |
136 | unsigned long pc; | |
137 | ||
138 | collect_register_by_name ("rip", &pc); | |
139 | ||
140 | if (debug_threads) | |
141 | fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc); | |
142 | return pc; | |
143 | } | |
144 | ||
145 | static void | |
146 | x86_64_set_pc (CORE_ADDR newpc) | |
147 | { | |
148 | if (debug_threads) | |
149 | fprintf (stderr, "set pc to %08lx\n", (long) newpc); | |
150 | supply_register_by_name ("rip", &newpc); | |
151 | } | |
152 | ||
153 | static int | |
154 | x86_64_breakpoint_at (CORE_ADDR pc) | |
155 | { | |
156 | unsigned char c; | |
157 | ||
158 | read_inferior_memory (pc, &c, 1); | |
159 | if (c == 0xCC) | |
160 | return 1; | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
2ec06d2e | 165 | struct linux_target_ops the_low_target = { |
d05b4ac3 | 166 | init_registers_x86_64_linux, |
2ec06d2e DJ |
167 | -1, |
168 | NULL, | |
169 | NULL, | |
170 | NULL, | |
011a70c2 DJ |
171 | x86_64_get_pc, |
172 | x86_64_set_pc, | |
1b3f6016 | 173 | x86_64_breakpoint, |
011a70c2 | 174 | x86_64_breakpoint_len, |
1b3f6016 | 175 | NULL, |
011a70c2 DJ |
176 | 1, |
177 | x86_64_breakpoint_at, | |
23181151 DJ |
178 | NULL, |
179 | NULL, | |
180 | NULL, | |
181 | NULL, | |
ee1a7ae4 UW |
182 | NULL, |
183 | NULL, | |
2ec06d2e | 184 | }; |