1 /* Native-dependent code for AMD64 BSD's.
2
3 Copyright 2003, 2004 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
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.
11
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.
16
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., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #include "defs.h"
23 #include "inferior.h"
24 #include "regcache.h"
25 #include "target.h"
26
27 /* We include <signal.h> to make sure `struct fxsave64' is defined on
28 NetBSD, since NetBSD's <machine/reg.h> needs it. */
29 #include "gdb_assert.h"
30 #include <signal.h>
31 #include <sys/types.h>
32 #include <sys/ptrace.h>
33 #include <machine/reg.h>
34
35 #include "amd64-tdep.h"
36 #include "amd64-nat.h"
37 #include "inf-ptrace.h"
38
39
40 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
41 for all registers (including the floating-point registers). */
42
43 static void
amd64bsd_fetch_inferior_registers(int regnum)44 amd64bsd_fetch_inferior_registers (int regnum)
45 {
46 int pid;
47
48 /* Cater for systems like OpenBSD, that implement threads as
49 separate processes. */
50 pid = ptid_get_lwp (inferior_ptid);
51 if (pid == 0)
52 pid = ptid_get_pid (inferior_ptid);
53
54 if (regnum == -1 || amd64_native_gregset_supplies_p (regnum))
55 {
56 struct reg regs;
57
58 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
59 perror_with_name ("Couldn't get registers");
60
61 amd64_supply_native_gregset (current_regcache, ®s, -1);
62 if (regnum != -1)
63 return;
64 }
65
66 if (regnum == -1 || !amd64_native_gregset_supplies_p (regnum))
67 {
68 struct fpreg fpregs;
69
70 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
71 perror_with_name ("Couldn't get floating point status");
72
73 amd64_supply_fxsave (current_regcache, -1, &fpregs);
74 }
75 }
76
77 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
78 this for all registers (including the floating-point registers). */
79
80 static void
amd64bsd_store_inferior_registers(int regnum)81 amd64bsd_store_inferior_registers (int regnum)
82 {
83 int pid;
84
85 /* Cater for systems like OpenBSD, that implement threads as
86 separate processes. */
87 pid = ptid_get_lwp (inferior_ptid);
88 if (pid == 0)
89 pid = ptid_get_pid (inferior_ptid);
90
91 if (regnum == -1 || amd64_native_gregset_supplies_p (regnum))
92 {
93 struct reg regs;
94
95 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
96 perror_with_name ("Couldn't get registers");
97
98 amd64_collect_native_gregset (current_regcache, ®s, regnum);
99
100 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
101 perror_with_name ("Couldn't write registers");
102
103 if (regnum != -1)
104 return;
105 }
106
107 if (regnum == -1 || !amd64_native_gregset_supplies_p (regnum))
108 {
109 struct fpreg fpregs;
110
111 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
112 perror_with_name ("Couldn't get floating point status");
113
114 amd64_collect_fxsave (current_regcache, regnum, &fpregs);
115
116 if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
117 perror_with_name ("Couldn't write floating point status");
118 }
119 }
120
121 /* Create a prototype *BSD/amd64 target. The client can override it
122 with local methods. */
123
124 struct target_ops *
amd64bsd_target(void)125 amd64bsd_target (void)
126 {
127 struct target_ops *t;
128
129 t = inf_ptrace_target ();
130 t->to_fetch_registers = amd64bsd_fetch_inferior_registers;
131 t->to_store_registers = amd64bsd_store_inferior_registers;
132 return t;
133 }
134