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58caa3dc DJ |
1 | /* GNU/Linux/x86-64 specific low level interface, for the remote server |
2 | for GDB. | |
fd500816 | 3 | Copyright 2002, 2004 |
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 | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "server.h" | |
24 | #include "linux-low.h" | |
25 | #include "i387-fp.h" | |
26 | ||
fd500816 DJ |
27 | /* Correct for all GNU/Linux targets (for quite some time). */ |
28 | #define GDB_GREGSET_T elf_gregset_t | |
29 | #define GDB_FPREGSET_T elf_fpregset_t | |
30 | ||
31 | #ifndef HAVE_ELF_FPREGSET_T | |
32 | /* Make sure we have said types. Not all platforms bring in <linux/elf.h> | |
33 | via <sys/procfs.h>. */ | |
34 | #ifdef HAVE_LINUX_ELF_H | |
35 | #include <linux/elf.h> | |
36 | #endif | |
37 | #endif | |
38 | ||
39 | #include "../gdb_proc_service.h" | |
40 | ||
58caa3dc DJ |
41 | #include <sys/reg.h> |
42 | #include <sys/procfs.h> | |
43 | #include <sys/ptrace.h> | |
44 | ||
fd500816 DJ |
45 | /* This definition comes from prctl.h, but some kernels may not have it. */ |
46 | #ifndef PTRACE_ARCH_PRCTL | |
47 | #define PTRACE_ARCH_PRCTL 30 | |
48 | #endif | |
49 | ||
09ec9b38 | 50 | static int x86_64_regmap[] = { |
638c1580 ML |
51 | RAX * 8, RBX * 8, RCX * 8, RDX * 8, |
52 | RSI * 8, RDI * 8, RBP * 8, RSP * 8, | |
53 | R8 * 8, R9 * 8, R10 * 8, R11 * 8, | |
54 | R12 * 8, R13 * 8, R14 * 8, R15 * 8, | |
09ec9b38 | 55 | RIP * 8, EFLAGS * 8, CS * 8, SS * 8, |
638c1580 | 56 | DS * 8, ES * 8, FS * 8, GS * 8 |
58caa3dc DJ |
57 | }; |
58 | ||
09ec9b38 ML |
59 | #define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int)) |
60 | ||
fd500816 DJ |
61 | /* Called by libthread_db. */ |
62 | ||
63 | ps_err_e | |
64 | ps_get_thread_area (const struct ps_prochandle *ph, | |
65 | lwpid_t lwpid, int idx, void **base) | |
66 | { | |
67 | switch (idx) | |
68 | { | |
69 | case FS: | |
70 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) | |
71 | return PS_OK; | |
72 | break; | |
73 | case GS: | |
74 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) | |
75 | return PS_OK; | |
76 | break; | |
77 | default: | |
78 | return PS_BADADDR; | |
79 | } | |
80 | return PS_ERR; | |
81 | } | |
82 | ||
58caa3dc DJ |
83 | static void |
84 | x86_64_fill_gregset (void *buf) | |
85 | { | |
86 | int i; | |
87 | ||
de220d0f | 88 | for (i = 0; i < X86_64_NUM_GREGS; i++) |
2ec06d2e | 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++) |
2ec06d2e | 98 | supply_register (i, ((char *) buf) + x86_64_regmap[i]); |
58caa3dc DJ |
99 | } |
100 | ||
101 | static void | |
102 | x86_64_fill_fpregset (void *buf) | |
103 | { | |
104 | i387_cache_to_fxsave (buf); | |
105 | } | |
106 | ||
107 | static void | |
638c1580 | 108 | x86_64_store_fpregset (const void *buf) |
58caa3dc DJ |
109 | { |
110 | i387_fxsave_to_cache (buf); | |
111 | } | |
112 | ||
58caa3dc DJ |
113 | struct regset_info target_regsets[] = { |
114 | { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t), | |
0d62e5e8 | 115 | GENERAL_REGS, |
58caa3dc DJ |
116 | x86_64_fill_gregset, x86_64_store_gregset }, |
117 | { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t), | |
0d62e5e8 | 118 | FP_REGS, |
58caa3dc | 119 | x86_64_fill_fpregset, x86_64_store_fpregset }, |
0d62e5e8 | 120 | { 0, 0, -1, -1, NULL, NULL } |
58caa3dc | 121 | }; |
2ec06d2e DJ |
122 | |
123 | struct linux_target_ops the_low_target = { | |
124 | -1, | |
125 | NULL, | |
126 | NULL, | |
127 | NULL, | |
128 | }; |