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"
28 #include <sys/procfs.h>
29 #include <sys/ptrace.h>
31 /* This definition comes from prctl.h, but some kernels may not have it. */
32 #ifndef PTRACE_ARCH_PRCTL
33 #define PTRACE_ARCH_PRCTL 30
36 /* The following definitions come from prctl.h, but may be absent
37 for certain configurations. */
39 #define ARCH_SET_GS 0x1001
40 #define ARCH_SET_FS 0x1002
41 #define ARCH_GET_FS 0x1003
42 #define ARCH_GET_GS 0x1004
45 static int x86_64_regmap
[] = {
46 RAX
* 8, RBX
* 8, RCX
* 8, RDX
* 8,
47 RSI
* 8, RDI
* 8, RBP
* 8, RSP
* 8,
48 R8
* 8, R9
* 8, R10
* 8, R11
* 8,
49 R12
* 8, R13
* 8, R14
* 8, R15
* 8,
50 RIP
* 8, EFLAGS
* 8, CS
* 8, SS
* 8,
51 DS
* 8, ES
* 8, FS
* 8, GS
* 8,
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,
55 -1, -1, -1, -1, -1, -1, -1, -1, -1,
59 #define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int))
61 /* Called by libthread_db. */
64 ps_get_thread_area (const struct ps_prochandle
*ph
,
65 lwpid_t lwpid
, int idx
, void **base
)
70 if (ptrace (PTRACE_ARCH_PRCTL
, lwpid
, base
, ARCH_GET_FS
) == 0)
74 if (ptrace (PTRACE_ARCH_PRCTL
, lwpid
, base
, ARCH_GET_GS
) == 0)
84 x86_64_fill_gregset (void *buf
)
88 for (i
= 0; i
< X86_64_NUM_GREGS
; i
++)
89 if (x86_64_regmap
[i
] != -1)
90 collect_register (i
, ((char *) buf
) + x86_64_regmap
[i
]);
94 x86_64_store_gregset (const void *buf
)
98 for (i
= 0; i
< X86_64_NUM_GREGS
; i
++)
99 if (x86_64_regmap
[i
] != -1)
100 supply_register (i
, ((char *) buf
) + x86_64_regmap
[i
]);
104 x86_64_fill_fpregset (void *buf
)
106 i387_cache_to_fxsave (buf
);
110 x86_64_store_fpregset (const void *buf
)
112 i387_fxsave_to_cache (buf
);
115 struct regset_info target_regsets
[] = {
116 { PTRACE_GETREGS
, PTRACE_SETREGS
, sizeof (elf_gregset_t
),
118 x86_64_fill_gregset
, x86_64_store_gregset
},
119 { PTRACE_GETFPREGS
, PTRACE_SETFPREGS
, sizeof (elf_fpregset_t
),
121 x86_64_fill_fpregset
, x86_64_store_fpregset
},
122 { 0, 0, -1, -1, NULL
, NULL
}
125 static const unsigned char x86_64_breakpoint
[] = { 0xCC };
126 #define x86_64_breakpoint_len 1
128 extern int debug_threads
;
135 collect_register_by_name ("rip", &pc
);
138 fprintf (stderr
, "stop pc (before any decrement) is %08lx\n", pc
);
143 x86_64_set_pc (CORE_ADDR newpc
)
146 fprintf (stderr
, "set pc to %08lx\n", (long) newpc
);
147 supply_register_by_name ("rip", &newpc
);
151 x86_64_breakpoint_at (CORE_ADDR pc
)
155 read_inferior_memory (pc
, &c
, 1);
162 struct linux_target_ops the_low_target
= {
170 x86_64_breakpoint_len
,
173 x86_64_breakpoint_at
,