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cced5e27 MK |
1 | /* Native-dependent code for AMD64 BSD's. |
2 | ||
32d0add0 | 3 | Copyright (C) 2003-2015 Free Software Foundation, Inc. |
cced5e27 MK |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
cced5e27 MK |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
cced5e27 MK |
19 | |
20 | #include "defs.h" | |
21 | #include "inferior.h" | |
22 | #include "regcache.h" | |
6a5c78a3 | 23 | #include "target.h" |
cced5e27 MK |
24 | |
25 | /* We include <signal.h> to make sure `struct fxsave64' is defined on | |
26 | NetBSD, since NetBSD's <machine/reg.h> needs it. */ | |
cced5e27 MK |
27 | #include <signal.h> |
28 | #include <sys/types.h> | |
29 | #include <sys/ptrace.h> | |
30 | #include <machine/reg.h> | |
31 | ||
85be1ca6 | 32 | #include "amd64-tdep.h" |
cced5e27 | 33 | #include "amd64-nat.h" |
649c7061 | 34 | #include "amd64bsd-nat.h" |
6a5c78a3 | 35 | #include "inf-ptrace.h" |
cced5e27 MK |
36 | \f |
37 | ||
97de3545 JB |
38 | #ifdef PT_GETXSTATE_INFO |
39 | size_t amd64bsd_xsave_len; | |
40 | #endif | |
41 | ||
cced5e27 MK |
42 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
43 | for all registers (including the floating-point registers). */ | |
44 | ||
6a5c78a3 | 45 | static void |
28439f5e PA |
46 | amd64bsd_fetch_inferior_registers (struct target_ops *ops, |
47 | struct regcache *regcache, int regnum) | |
cced5e27 | 48 | { |
f8028488 MD |
49 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
50 | ||
51 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) | |
cced5e27 MK |
52 | { |
53 | struct reg regs; | |
54 | ||
dfd4cc63 | 55 | if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid), |
9f8e0089 | 56 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
edefbb7c | 57 | perror_with_name (_("Couldn't get registers")); |
cced5e27 | 58 | |
56be3814 | 59 | amd64_supply_native_gregset (regcache, ®s, -1); |
cced5e27 MK |
60 | if (regnum != -1) |
61 | return; | |
62 | } | |
63 | ||
f8028488 | 64 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
cced5e27 MK |
65 | { |
66 | struct fpreg fpregs; | |
97de3545 JB |
67 | #ifdef PT_GETXSTATE_INFO |
68 | char *xstateregs; | |
69 | ||
70 | if (amd64bsd_xsave_len != 0) | |
71 | { | |
72 | xstateregs = alloca (amd64bsd_xsave_len); | |
73 | if (ptrace (PT_GETXSTATE, ptid_get_pid (inferior_ptid), | |
74 | (PTRACE_TYPE_ARG3) xstateregs, 0) == -1) | |
75 | perror_with_name (_("Couldn't get extended state status")); | |
76 | ||
77 | amd64_supply_xsave (regcache, -1, xstateregs); | |
78 | return; | |
79 | } | |
80 | #endif | |
cced5e27 | 81 | |
dfd4cc63 | 82 | if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid), |
9f8e0089 | 83 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
edefbb7c | 84 | perror_with_name (_("Couldn't get floating point status")); |
cced5e27 | 85 | |
56be3814 | 86 | amd64_supply_fxsave (regcache, -1, &fpregs); |
cced5e27 MK |
87 | } |
88 | } | |
89 | ||
90 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do | |
91 | this for all registers (including the floating-point registers). */ | |
92 | ||
6a5c78a3 | 93 | static void |
28439f5e PA |
94 | amd64bsd_store_inferior_registers (struct target_ops *ops, |
95 | struct regcache *regcache, int regnum) | |
cced5e27 | 96 | { |
f8028488 MD |
97 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
98 | ||
99 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) | |
cced5e27 MK |
100 | { |
101 | struct reg regs; | |
102 | ||
dfd4cc63 | 103 | if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid), |
9f8e0089 | 104 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
edefbb7c | 105 | perror_with_name (_("Couldn't get registers")); |
cced5e27 | 106 | |
56be3814 | 107 | amd64_collect_native_gregset (regcache, ®s, regnum); |
cced5e27 | 108 | |
dfd4cc63 | 109 | if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid), |
9f8e0089 | 110 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
edefbb7c | 111 | perror_with_name (_("Couldn't write registers")); |
cced5e27 MK |
112 | |
113 | if (regnum != -1) | |
114 | return; | |
115 | } | |
116 | ||
f8028488 | 117 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
cced5e27 MK |
118 | { |
119 | struct fpreg fpregs; | |
97de3545 JB |
120 | #ifdef PT_GETXSTATE_INFO |
121 | char *xstateregs; | |
122 | ||
123 | if (amd64bsd_xsave_len != 0) | |
124 | { | |
125 | xstateregs = alloca (amd64bsd_xsave_len); | |
126 | if (ptrace (PT_GETXSTATE, ptid_get_pid (inferior_ptid), | |
127 | (PTRACE_TYPE_ARG3) xstateregs, 0) == -1) | |
128 | perror_with_name (_("Couldn't get extended state status")); | |
129 | ||
130 | amd64_collect_xsave (regcache, regnum, xstateregs, 0); | |
131 | ||
132 | if (ptrace (PT_SETXSTATE, ptid_get_pid (inferior_ptid), | |
133 | (PTRACE_TYPE_ARG3) xstateregs, amd64bsd_xsave_len) == -1) | |
134 | perror_with_name (_("Couldn't write extended state status")); | |
135 | return; | |
136 | } | |
137 | #endif | |
cced5e27 | 138 | |
dfd4cc63 | 139 | if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid), |
9f8e0089 | 140 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
edefbb7c | 141 | perror_with_name (_("Couldn't get floating point status")); |
cced5e27 | 142 | |
56be3814 | 143 | amd64_collect_fxsave (regcache, regnum, &fpregs); |
cced5e27 | 144 | |
dfd4cc63 | 145 | if (ptrace (PT_SETFPREGS, ptid_get_pid (inferior_ptid), |
9f8e0089 | 146 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
edefbb7c | 147 | perror_with_name (_("Couldn't write floating point status")); |
cced5e27 MK |
148 | } |
149 | } | |
6a5c78a3 MK |
150 | |
151 | /* Create a prototype *BSD/amd64 target. The client can override it | |
152 | with local methods. */ | |
153 | ||
154 | struct target_ops * | |
155 | amd64bsd_target (void) | |
156 | { | |
157 | struct target_ops *t; | |
158 | ||
159 | t = inf_ptrace_target (); | |
160 | t->to_fetch_registers = amd64bsd_fetch_inferior_registers; | |
161 | t->to_store_registers = amd64bsd_store_inferior_registers; | |
162 | return t; | |
163 | } | |
1916efaf PA |
164 | \f |
165 | ||
166 | /* Support for debug registers. */ | |
167 | ||
168 | #ifdef HAVE_PT_GETDBREGS | |
169 | ||
170 | static unsigned long | |
171 | amd64bsd_dr_get (ptid_t ptid, int regnum) | |
172 | { | |
173 | struct dbreg dbregs; | |
174 | ||
dfd4cc63 | 175 | if (ptrace (PT_GETDBREGS, ptid_get_pid (inferior_ptid), |
1916efaf PA |
176 | (PTRACE_TYPE_ARG3) &dbregs, 0) == -1) |
177 | perror_with_name (_("Couldn't read debug registers")); | |
178 | ||
179 | return DBREG_DRX ((&dbregs), regnum); | |
180 | } | |
181 | ||
182 | static void | |
183 | amd64bsd_dr_set (int regnum, unsigned long value) | |
184 | { | |
185 | struct dbreg dbregs; | |
186 | ||
dfd4cc63 | 187 | if (ptrace (PT_GETDBREGS, ptid_get_pid (inferior_ptid), |
1916efaf PA |
188 | (PTRACE_TYPE_ARG3) &dbregs, 0) == -1) |
189 | perror_with_name (_("Couldn't get debug registers")); | |
190 | ||
191 | /* For some mysterious reason, some of the reserved bits in the | |
192 | debug control register get set. Mask these off, otherwise the | |
193 | ptrace call below will fail. */ | |
194 | DBREG_DRX ((&dbregs), 7) &= ~(0xffffffff0000fc00); | |
195 | ||
196 | DBREG_DRX ((&dbregs), regnum) = value; | |
197 | ||
dfd4cc63 | 198 | if (ptrace (PT_SETDBREGS, ptid_get_pid (inferior_ptid), |
1916efaf PA |
199 | (PTRACE_TYPE_ARG3) &dbregs, 0) == -1) |
200 | perror_with_name (_("Couldn't write debug registers")); | |
201 | } | |
202 | ||
203 | void | |
204 | amd64bsd_dr_set_control (unsigned long control) | |
205 | { | |
206 | amd64bsd_dr_set (7, control); | |
207 | } | |
208 | ||
209 | void | |
210 | amd64bsd_dr_set_addr (int regnum, CORE_ADDR addr) | |
211 | { | |
212 | gdb_assert (regnum >= 0 && regnum <= 4); | |
213 | ||
214 | amd64bsd_dr_set (regnum, addr); | |
215 | } | |
216 | ||
217 | CORE_ADDR | |
218 | amd64bsd_dr_get_addr (int regnum) | |
219 | { | |
220 | return amd64bsd_dr_get (inferior_ptid, regnum); | |
221 | } | |
222 | ||
223 | unsigned long | |
224 | amd64bsd_dr_get_status (void) | |
225 | { | |
226 | return amd64bsd_dr_get (inferior_ptid, 6); | |
227 | } | |
228 | ||
229 | unsigned long | |
230 | amd64bsd_dr_get_control (void) | |
231 | { | |
232 | return amd64bsd_dr_get (inferior_ptid, 7); | |
233 | } | |
234 | ||
235 | #endif /* PT_GETDBREGS */ |