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58caa3dc DJ |
1 | /* GNU/Linux/x86-64 specific low level interface, for the remote server |
2 | for GDB. | |
0050a760 | 3 | Copyright (C) 2002, 2004, 2005, 2006 |
58caa3dc DJ |
4 | Free Software Foundation, Inc. |
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 | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
19 | along with this program; if not, write to the Free Software | |
6f0f660e EZ |
20 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
58caa3dc DJ |
22 | |
23 | #include "server.h" | |
24 | #include "linux-low.h" | |
25 | #include "i387-fp.h" | |
26 | ||
0050a760 | 27 | #include "gdb_proc_service.h" |
fd500816 | 28 | |
58caa3dc DJ |
29 | #include <sys/reg.h> |
30 | #include <sys/procfs.h> | |
31 | #include <sys/ptrace.h> | |
32 | ||
fd500816 DJ |
33 | /* This definition comes from prctl.h, but some kernels may not have it. */ |
34 | #ifndef PTRACE_ARCH_PRCTL | |
35 | #define PTRACE_ARCH_PRCTL 30 | |
36 | #endif | |
37 | ||
43360365 JB |
38 | /* The following definitions come from prctl.h, but may be absent |
39 | for certain configurations. */ | |
40 | #ifndef ARCH_GET_FS | |
41 | #define ARCH_SET_GS 0x1001 | |
42 | #define ARCH_SET_FS 0x1002 | |
43 | #define ARCH_GET_FS 0x1003 | |
44 | #define ARCH_GET_GS 0x1004 | |
45 | #endif | |
46 | ||
09ec9b38 | 47 | static int x86_64_regmap[] = { |
638c1580 ML |
48 | RAX * 8, RBX * 8, RCX * 8, RDX * 8, |
49 | RSI * 8, RDI * 8, RBP * 8, RSP * 8, | |
50 | R8 * 8, R9 * 8, R10 * 8, R11 * 8, | |
51 | R12 * 8, R13 * 8, R14 * 8, R15 * 8, | |
09ec9b38 | 52 | RIP * 8, EFLAGS * 8, CS * 8, SS * 8, |
8695c747 DJ |
53 | DS * 8, ES * 8, FS * 8, GS * 8, |
54 | -1, -1, -1, -1, -1, -1, -1, -1, | |
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, -1, | |
58 | ORIG_RAX * 8 | |
58caa3dc DJ |
59 | }; |
60 | ||
09ec9b38 ML |
61 | #define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int)) |
62 | ||
fd500816 DJ |
63 | /* Called by libthread_db. */ |
64 | ||
65 | ps_err_e | |
66 | ps_get_thread_area (const struct ps_prochandle *ph, | |
67 | lwpid_t lwpid, int idx, void **base) | |
68 | { | |
69 | switch (idx) | |
70 | { | |
71 | case FS: | |
72 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) | |
73 | return PS_OK; | |
74 | break; | |
75 | case GS: | |
76 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) | |
77 | return PS_OK; | |
78 | break; | |
79 | default: | |
80 | return PS_BADADDR; | |
81 | } | |
82 | return PS_ERR; | |
83 | } | |
84 | ||
58caa3dc DJ |
85 | static void |
86 | x86_64_fill_gregset (void *buf) | |
87 | { | |
88 | int i; | |
89 | ||
de220d0f | 90 | for (i = 0; i < X86_64_NUM_GREGS; i++) |
8695c747 DJ |
91 | if (x86_64_regmap[i] != -1) |
92 | collect_register (i, ((char *) buf) + x86_64_regmap[i]); | |
58caa3dc DJ |
93 | } |
94 | ||
95 | static void | |
638c1580 | 96 | x86_64_store_gregset (const void *buf) |
58caa3dc DJ |
97 | { |
98 | int i; | |
99 | ||
de220d0f | 100 | for (i = 0; i < X86_64_NUM_GREGS; i++) |
8695c747 DJ |
101 | if (x86_64_regmap[i] != -1) |
102 | supply_register (i, ((char *) buf) + x86_64_regmap[i]); | |
58caa3dc DJ |
103 | } |
104 | ||
105 | static void | |
106 | x86_64_fill_fpregset (void *buf) | |
107 | { | |
108 | i387_cache_to_fxsave (buf); | |
109 | } | |
110 | ||
111 | static void | |
638c1580 | 112 | x86_64_store_fpregset (const void *buf) |
58caa3dc DJ |
113 | { |
114 | i387_fxsave_to_cache (buf); | |
115 | } | |
116 | ||
58caa3dc DJ |
117 | struct regset_info target_regsets[] = { |
118 | { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t), | |
0d62e5e8 | 119 | GENERAL_REGS, |
58caa3dc DJ |
120 | x86_64_fill_gregset, x86_64_store_gregset }, |
121 | { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t), | |
0d62e5e8 | 122 | FP_REGS, |
58caa3dc | 123 | x86_64_fill_fpregset, x86_64_store_fpregset }, |
0d62e5e8 | 124 | { 0, 0, -1, -1, NULL, NULL } |
58caa3dc | 125 | }; |
2ec06d2e | 126 | |
011a70c2 DJ |
127 | static const unsigned char x86_64_breakpoint[] = { 0xCC }; |
128 | #define x86_64_breakpoint_len 1 | |
129 | ||
130 | extern int debug_threads; | |
131 | ||
132 | static CORE_ADDR | |
133 | x86_64_get_pc () | |
134 | { | |
135 | unsigned long pc; | |
136 | ||
137 | collect_register_by_name ("rip", &pc); | |
138 | ||
139 | if (debug_threads) | |
140 | fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc); | |
141 | return pc; | |
142 | } | |
143 | ||
144 | static void | |
145 | x86_64_set_pc (CORE_ADDR newpc) | |
146 | { | |
147 | if (debug_threads) | |
148 | fprintf (stderr, "set pc to %08lx\n", (long) newpc); | |
149 | supply_register_by_name ("rip", &newpc); | |
150 | } | |
151 | ||
152 | static int | |
153 | x86_64_breakpoint_at (CORE_ADDR pc) | |
154 | { | |
155 | unsigned char c; | |
156 | ||
157 | read_inferior_memory (pc, &c, 1); | |
158 | if (c == 0xCC) | |
159 | return 1; | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
2ec06d2e DJ |
164 | struct linux_target_ops the_low_target = { |
165 | -1, | |
166 | NULL, | |
167 | NULL, | |
168 | NULL, | |
011a70c2 DJ |
169 | x86_64_get_pc, |
170 | x86_64_set_pc, | |
171 | x86_64_breakpoint, | |
172 | x86_64_breakpoint_len, | |
173 | NULL, | |
174 | 1, | |
175 | x86_64_breakpoint_at, | |
2ec06d2e | 176 | }; |