1 /* GNU/Linux/x86-64 specific low level interface, for the remote server
3 Copyright (C) 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
5 This file is part of GDB.
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
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
23 #include "linux-low.h"
26 #include "gdb_proc_service.h"
29 #include <sys/procfs.h>
30 #include <sys/ptrace.h>
32 /* This definition comes from prctl.h, but some kernels may not have it. */
33 #ifndef PTRACE_ARCH_PRCTL
34 #define PTRACE_ARCH_PRCTL 30
37 /* The following definitions come from prctl.h, but may be absent
38 for certain configurations. */
40 #define ARCH_SET_GS 0x1001
41 #define ARCH_SET_FS 0x1002
42 #define ARCH_GET_FS 0x1003
43 #define ARCH_GET_GS 0x1004
46 static int x86_64_regmap[] = {
47 RAX * 8, RBX * 8, RCX * 8, RDX * 8,
48 RSI * 8, RDI * 8, RBP * 8, RSP * 8,
49 R8 * 8, R9 * 8, R10 * 8, R11 * 8,
50 R12 * 8, R13 * 8, R14 * 8, R15 * 8,
51 RIP * 8, EFLAGS * 8, CS * 8, SS * 8,
52 DS * 8, ES * 8, FS * 8, GS * 8,
53 -1, -1, -1, -1, -1, -1, -1, -1,
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, -1,
60 #define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int))
62 /* Called by libthread_db. */
65 ps_get_thread_area (const struct ps_prochandle *ph,
66 lwpid_t lwpid, int idx, void **base)
71 if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0)
75 if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0)
85 x86_64_fill_gregset (void *buf)
89 for (i = 0; i < X86_64_NUM_GREGS; i++)
90 if (x86_64_regmap[i] != -1)
91 collect_register (i, ((char *) buf) + x86_64_regmap[i]);
95 x86_64_store_gregset (const void *buf)
99 for (i = 0; i < X86_64_NUM_GREGS; i++)
100 if (x86_64_regmap[i] != -1)
101 supply_register (i, ((char *) buf) + x86_64_regmap[i]);
105 x86_64_fill_fpregset (void *buf)
107 i387_cache_to_fxsave (buf);
111 x86_64_store_fpregset (const void *buf)
113 i387_fxsave_to_cache (buf);
116 struct regset_info target_regsets[] = {
117 { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
119 x86_64_fill_gregset, x86_64_store_gregset },
120 { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
122 x86_64_fill_fpregset, x86_64_store_fpregset },
123 { 0, 0, -1, -1, NULL, NULL }
126 static const unsigned char x86_64_breakpoint[] = { 0xCC };
127 #define x86_64_breakpoint_len 1
129 extern int debug_threads;
136 collect_register_by_name ("rip", &pc);
139 fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc);
144 x86_64_set_pc (CORE_ADDR newpc)
147 fprintf (stderr, "set pc to %08lx\n", (long) newpc);
148 supply_register_by_name ("rip", &newpc);
152 x86_64_breakpoint_at (CORE_ADDR pc)
156 read_inferior_memory (pc, &c, 1);
163 struct linux_target_ops the_low_target = {
171 x86_64_breakpoint_len,
174 x86_64_breakpoint_at,