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58caa3dc DJ |
1 | /* GNU/Linux/x86-64 specific low level interface, for the remote server |
2 | for GDB. | |
6aba47ca | 3 | Copyright (C) 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
58caa3dc DJ |
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 |
58caa3dc DJ |
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/>. */ |
58caa3dc DJ |
19 | |
20 | #include "server.h" | |
21 | #include "linux-low.h" | |
22 | #include "i387-fp.h" | |
23 | ||
0050a760 | 24 | #include "gdb_proc_service.h" |
fd500816 | 25 | |
58caa3dc DJ |
26 | #include <sys/reg.h> |
27 | #include <sys/procfs.h> | |
28 | #include <sys/ptrace.h> | |
29 | ||
fd500816 DJ |
30 | /* This definition comes from prctl.h, but some kernels may not have it. */ |
31 | #ifndef PTRACE_ARCH_PRCTL | |
32 | #define PTRACE_ARCH_PRCTL 30 | |
33 | #endif | |
34 | ||
43360365 JB |
35 | /* The following definitions come from prctl.h, but may be absent |
36 | for certain configurations. */ | |
37 | #ifndef ARCH_GET_FS | |
38 | #define ARCH_SET_GS 0x1001 | |
39 | #define ARCH_SET_FS 0x1002 | |
40 | #define ARCH_GET_FS 0x1003 | |
41 | #define ARCH_GET_GS 0x1004 | |
42 | #endif | |
43 | ||
09ec9b38 | 44 | static int x86_64_regmap[] = { |
638c1580 ML |
45 | RAX * 8, RBX * 8, RCX * 8, RDX * 8, |
46 | RSI * 8, RDI * 8, RBP * 8, RSP * 8, | |
47 | R8 * 8, R9 * 8, R10 * 8, R11 * 8, | |
48 | R12 * 8, R13 * 8, R14 * 8, R15 * 8, | |
09ec9b38 | 49 | RIP * 8, EFLAGS * 8, CS * 8, SS * 8, |
8695c747 DJ |
50 | DS * 8, ES * 8, FS * 8, GS * 8, |
51 | -1, -1, -1, -1, -1, -1, -1, -1, | |
52 | -1, -1, -1, -1, -1, -1, -1, -1, | |
53 | -1, -1, -1, -1, -1, -1, -1, -1, | |
54 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
55 | ORIG_RAX * 8 | |
58caa3dc DJ |
56 | }; |
57 | ||
09ec9b38 ML |
58 | #define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int)) |
59 | ||
fd500816 DJ |
60 | /* Called by libthread_db. */ |
61 | ||
62 | ps_err_e | |
63 | ps_get_thread_area (const struct ps_prochandle *ph, | |
64 | lwpid_t lwpid, int idx, void **base) | |
65 | { | |
66 | switch (idx) | |
67 | { | |
68 | case FS: | |
69 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) | |
70 | return PS_OK; | |
71 | break; | |
72 | case GS: | |
73 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) | |
74 | return PS_OK; | |
75 | break; | |
76 | default: | |
77 | return PS_BADADDR; | |
78 | } | |
79 | return PS_ERR; | |
80 | } | |
81 | ||
58caa3dc DJ |
82 | static void |
83 | x86_64_fill_gregset (void *buf) | |
84 | { | |
85 | int i; | |
86 | ||
de220d0f | 87 | for (i = 0; i < X86_64_NUM_GREGS; i++) |
8695c747 DJ |
88 | if (x86_64_regmap[i] != -1) |
89 | collect_register (i, ((char *) buf) + x86_64_regmap[i]); | |
58caa3dc DJ |
90 | } |
91 | ||
92 | static void | |
638c1580 | 93 | x86_64_store_gregset (const void *buf) |
58caa3dc DJ |
94 | { |
95 | int i; | |
96 | ||
de220d0f | 97 | for (i = 0; i < X86_64_NUM_GREGS; i++) |
8695c747 DJ |
98 | if (x86_64_regmap[i] != -1) |
99 | supply_register (i, ((char *) buf) + x86_64_regmap[i]); | |
58caa3dc DJ |
100 | } |
101 | ||
102 | static void | |
103 | x86_64_fill_fpregset (void *buf) | |
104 | { | |
105 | i387_cache_to_fxsave (buf); | |
106 | } | |
107 | ||
108 | static void | |
638c1580 | 109 | x86_64_store_fpregset (const void *buf) |
58caa3dc DJ |
110 | { |
111 | i387_fxsave_to_cache (buf); | |
112 | } | |
113 | ||
58caa3dc DJ |
114 | struct regset_info target_regsets[] = { |
115 | { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t), | |
0d62e5e8 | 116 | GENERAL_REGS, |
58caa3dc DJ |
117 | x86_64_fill_gregset, x86_64_store_gregset }, |
118 | { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t), | |
0d62e5e8 | 119 | FP_REGS, |
58caa3dc | 120 | x86_64_fill_fpregset, x86_64_store_fpregset }, |
0d62e5e8 | 121 | { 0, 0, -1, -1, NULL, NULL } |
58caa3dc | 122 | }; |
2ec06d2e | 123 | |
011a70c2 DJ |
124 | static const unsigned char x86_64_breakpoint[] = { 0xCC }; |
125 | #define x86_64_breakpoint_len 1 | |
126 | ||
127 | extern int debug_threads; | |
128 | ||
129 | static CORE_ADDR | |
130 | x86_64_get_pc () | |
131 | { | |
132 | unsigned long pc; | |
133 | ||
134 | collect_register_by_name ("rip", &pc); | |
135 | ||
136 | if (debug_threads) | |
137 | fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc); | |
138 | return pc; | |
139 | } | |
140 | ||
141 | static void | |
142 | x86_64_set_pc (CORE_ADDR newpc) | |
143 | { | |
144 | if (debug_threads) | |
145 | fprintf (stderr, "set pc to %08lx\n", (long) newpc); | |
146 | supply_register_by_name ("rip", &newpc); | |
147 | } | |
148 | ||
149 | static int | |
150 | x86_64_breakpoint_at (CORE_ADDR pc) | |
151 | { | |
152 | unsigned char c; | |
153 | ||
154 | read_inferior_memory (pc, &c, 1); | |
155 | if (c == 0xCC) | |
156 | return 1; | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
2ec06d2e DJ |
161 | struct linux_target_ops the_low_target = { |
162 | -1, | |
163 | NULL, | |
164 | NULL, | |
165 | NULL, | |
011a70c2 DJ |
166 | x86_64_get_pc, |
167 | x86_64_set_pc, | |
168 | x86_64_breakpoint, | |
169 | x86_64_breakpoint_len, | |
170 | NULL, | |
171 | 1, | |
172 | x86_64_breakpoint_at, | |
23181151 DJ |
173 | NULL, |
174 | NULL, | |
175 | NULL, | |
176 | NULL, | |
177 | 0, | |
178 | "i386:x86-64", | |
2ec06d2e | 179 | }; |