1 /* GNU/Linux/x86-64 specific low level interface, for the remote server
3 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008
4 Free Software Foundation, Inc.
6 This file is part of GDB.
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 3 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "linux-low.h"
25 #include "gdb_proc_service.h"
27 /* Defined in auto-generated file reg-x86-64-linux.c. */
28 void init_registers_x86_64_linux (void);
31 #include <sys/procfs.h>
32 #include <sys/ptrace.h>
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
39 /* The following definitions come from prctl.h, but may be absent
40 for certain configurations. */
42 #define ARCH_SET_GS 0x1001
43 #define ARCH_SET_FS 0x1002
44 #define ARCH_GET_FS 0x1003
45 #define ARCH_GET_GS 0x1004
48 static int x86_64_regmap[] = {
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,
53 RIP * 8, EFLAGS * 8, CS * 8, SS * 8,
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,
62 #define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int))
64 /* Called by libthread_db. */
67 ps_get_thread_area (const struct ps_prochandle *ph,
68 lwpid_t lwpid, int idx, void **base)
73 if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0)
77 if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0)
87 x86_64_fill_gregset (void *buf)
91 for (i = 0; i < X86_64_NUM_GREGS; i++)
92 if (x86_64_regmap[i] != -1)
93 collect_register (i, ((char *) buf) + x86_64_regmap[i]);
97 x86_64_store_gregset (const void *buf)
101 for (i = 0; i < X86_64_NUM_GREGS; i++)
102 if (x86_64_regmap[i] != -1)
103 supply_register (i, ((char *) buf) + x86_64_regmap[i]);
107 x86_64_fill_fpregset (void *buf)
109 i387_cache_to_fxsave (buf);
113 x86_64_store_fpregset (const void *buf)
115 i387_fxsave_to_cache (buf);
118 struct regset_info target_regsets[] = {
119 { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
121 x86_64_fill_gregset, x86_64_store_gregset },
122 { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
124 x86_64_fill_fpregset, x86_64_store_fpregset },
125 { 0, 0, -1, -1, NULL, NULL }
128 static const unsigned char x86_64_breakpoint[] = { 0xCC };
129 #define x86_64_breakpoint_len 1
131 extern int debug_threads;
138 collect_register_by_name ("rip", &pc);
141 fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc);
146 x86_64_set_pc (CORE_ADDR newpc)
149 fprintf (stderr, "set pc to %08lx\n", (long) newpc);
150 supply_register_by_name ("rip", &newpc);
154 x86_64_breakpoint_at (CORE_ADDR pc)
158 read_inferior_memory (pc, &c, 1);
165 struct linux_target_ops the_low_target = {
166 init_registers_x86_64_linux,
174 x86_64_breakpoint_len,
177 x86_64_breakpoint_at,