Commit | Line | Data |
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da59e081 | 1 | /* Low level interface to i386 running the GNU Hurd. |
f6052080 | 2 | |
ecd75fc8 | 3 | Copyright (C) 1992-2014 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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 |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
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. | |
c906108c | 16 | |
c5aa993b | 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/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
21 | #include "inferior.h" | |
22 | #include "floatformat.h" | |
4e052eda | 23 | #include "regcache.h" |
c906108c | 24 | |
780a49fa | 25 | #include "gdb_assert.h" |
c906108c | 26 | #include <errno.h> |
0e9f083f | 27 | #include <string.h> |
c906108c SS |
28 | |
29 | #include <mach.h> | |
da59e081 | 30 | #include <mach_error.h> |
c906108c SS |
31 | #include <mach/message.h> |
32 | #include <mach/exception.h> | |
c906108c | 33 | |
4604bcad MK |
34 | #include "i386-tdep.h" |
35 | ||
c906108c | 36 | #include "gnu-nat.h" |
e750d25e | 37 | #include "i387-tdep.h" |
c906108c | 38 | |
57e76fac MS |
39 | #ifdef HAVE_SYS_PROCFS_H |
40 | # include <sys/procfs.h> | |
41 | # include "gregset.h" | |
42 | #endif | |
c906108c | 43 | |
da59e081 JM |
44 | /* Offset to the thread_state_t location where REG is stored. */ |
45 | #define REG_OFFSET(reg) offsetof (struct i386_thread_state, reg) | |
c906108c | 46 | |
383d750b MK |
47 | /* At REG_OFFSET[N] is the offset to the thread_state_t location where |
48 | the GDB register N is stored. */ | |
c5aa993b | 49 | static int reg_offset[] = |
c906108c | 50 | { |
c5aa993b JM |
51 | REG_OFFSET (eax), REG_OFFSET (ecx), REG_OFFSET (edx), REG_OFFSET (ebx), |
52 | REG_OFFSET (uesp), REG_OFFSET (ebp), REG_OFFSET (esi), REG_OFFSET (edi), | |
53 | REG_OFFSET (eip), REG_OFFSET (efl), REG_OFFSET (cs), REG_OFFSET (ss), | |
54 | REG_OFFSET (ds), REG_OFFSET (es), REG_OFFSET (fs), REG_OFFSET (gs) | |
c906108c SS |
55 | }; |
56 | ||
ecccb813 TS |
57 | /* Offset to the greg_t location where REG is stored. */ |
58 | #define CREG_OFFSET(reg) (REG_##reg * 4) | |
59 | ||
60 | /* At CREG_OFFSET[N] is the offset to the greg_t location where | |
61 | the GDB register N is stored. */ | |
62 | static int creg_offset[] = | |
63 | { | |
64 | CREG_OFFSET (EAX), CREG_OFFSET (ECX), CREG_OFFSET (EDX), CREG_OFFSET (EBX), | |
65 | CREG_OFFSET (UESP), CREG_OFFSET (EBP), CREG_OFFSET (ESI), CREG_OFFSET (EDI), | |
66 | CREG_OFFSET (EIP), CREG_OFFSET (EFL), CREG_OFFSET (CS), CREG_OFFSET (SS), | |
67 | CREG_OFFSET (DS), CREG_OFFSET (ES), CREG_OFFSET (FS), CREG_OFFSET (GS) | |
68 | }; | |
69 | ||
da59e081 | 70 | #define REG_ADDR(state, regnum) ((char *)(state) + reg_offset[regnum]) |
ecccb813 | 71 | #define CREG_ADDR(state, regnum) ((const char *)(state) + creg_offset[regnum]) |
da59e081 | 72 | |
c906108c | 73 | \f |
3303a276 MK |
74 | /* Get the whole floating-point state of THREAD and record the values |
75 | of the corresponding (pseudo) registers. */ | |
76 | ||
da59e081 | 77 | static void |
56be3814 | 78 | fetch_fpregs (struct regcache *regcache, struct proc *thread) |
c906108c | 79 | { |
da59e081 JM |
80 | mach_msg_type_number_t count = i386_FLOAT_STATE_COUNT; |
81 | struct i386_float_state state; | |
da59e081 | 82 | error_t err; |
c906108c | 83 | |
da59e081 JM |
84 | err = thread_get_state (thread->port, i386_FLOAT_STATE, |
85 | (thread_state_t) &state, &count); | |
86 | if (err) | |
c906108c | 87 | { |
8a3fe4f8 | 88 | warning (_("Couldn't fetch floating-point state from %s"), |
da59e081 JM |
89 | proc_string (thread)); |
90 | return; | |
c906108c | 91 | } |
da59e081 | 92 | |
383d750b | 93 | if (!state.initialized) |
c906108c | 94 | { |
3303a276 | 95 | /* The floating-point state isn't initialized. */ |
56be3814 | 96 | i387_supply_fsave (regcache, -1, NULL); |
3303a276 MK |
97 | } |
98 | else | |
99 | { | |
100 | /* Supply the floating-point registers. */ | |
56be3814 | 101 | i387_supply_fsave (regcache, -1, state.hw_state); |
c906108c SS |
102 | } |
103 | } | |
da59e081 | 104 | |
57e76fac MS |
105 | #ifdef HAVE_SYS_PROCFS_H |
106 | /* These two calls are used by the core-regset.c code for | |
107 | reading ELF core files. */ | |
108 | void | |
7f7fe91e | 109 | supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregs) |
57e76fac MS |
110 | { |
111 | int i; | |
65e78234 | 112 | for (i = 0; i < I386_NUM_GREGS; i++) |
7f7fe91e | 113 | regcache_raw_supply (regcache, i, CREG_ADDR (gregs, i)); |
57e76fac MS |
114 | } |
115 | ||
116 | void | |
7f7fe91e | 117 | supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregs) |
57e76fac | 118 | { |
7f7fe91e | 119 | i387_supply_fsave (regcache, -1, fpregs); |
57e76fac MS |
120 | } |
121 | #endif | |
122 | ||
da59e081 | 123 | /* Fetch register REGNO, or all regs if REGNO is -1. */ |
b4d1e8c7 | 124 | static void |
85a772a5 TS |
125 | gnu_fetch_registers (struct target_ops *ops, |
126 | struct regcache *regcache, int regno) | |
c906108c SS |
127 | { |
128 | struct proc *thread; | |
c5aa993b | 129 | |
da59e081 | 130 | /* Make sure we know about new threads. */ |
c289427b | 131 | inf_update_procs (gnu_current_inf); |
c906108c | 132 | |
c289427b | 133 | thread = inf_tid_to_thread (gnu_current_inf, |
ca08a94c | 134 | ptid_get_lwp (inferior_ptid)); |
c5aa993b | 135 | if (!thread) |
617fd3b5 PA |
136 | error (_("Can't fetch registers from thread %s: No such thread"), |
137 | target_pid_to_str (inferior_ptid)); | |
c906108c | 138 | |
65e78234 | 139 | if (regno < I386_NUM_GREGS || regno == -1) |
c906108c | 140 | { |
da59e081 | 141 | thread_state_t state; |
383d750b | 142 | |
da59e081 JM |
143 | /* This does the dirty work for us. */ |
144 | state = proc_get_state (thread, 0); | |
145 | if (!state) | |
c906108c | 146 | { |
8a3fe4f8 | 147 | warning (_("Couldn't fetch registers from %s"), |
da59e081 JM |
148 | proc_string (thread)); |
149 | return; | |
c906108c SS |
150 | } |
151 | ||
da59e081 | 152 | if (regno == -1) |
c906108c | 153 | { |
da59e081 | 154 | int i; |
383d750b | 155 | |
da59e081 | 156 | proc_debug (thread, "fetching all register"); |
383d750b | 157 | |
65e78234 | 158 | for (i = 0; i < I386_NUM_GREGS; i++) |
56be3814 | 159 | regcache_raw_supply (regcache, i, REG_ADDR (state, i)); |
da59e081 | 160 | thread->fetched_regs = ~0; |
c906108c SS |
161 | } |
162 | else | |
163 | { | |
c9f4d572 | 164 | proc_debug (thread, "fetching register %s", |
875f8d0e UW |
165 | gdbarch_register_name (get_regcache_arch (regcache), |
166 | regno)); | |
383d750b | 167 | |
56be3814 | 168 | regcache_raw_supply (regcache, regno, |
23a6d369 | 169 | REG_ADDR (state, regno)); |
da59e081 | 170 | thread->fetched_regs |= (1 << regno); |
c906108c SS |
171 | } |
172 | } | |
da59e081 | 173 | |
65e78234 | 174 | if (regno >= I386_NUM_GREGS || regno == -1) |
da59e081 JM |
175 | { |
176 | proc_debug (thread, "fetching floating-point registers"); | |
383d750b | 177 | |
56be3814 | 178 | fetch_fpregs (regcache, thread); |
da59e081 | 179 | } |
c906108c SS |
180 | } |
181 | \f | |
da59e081 JM |
182 | |
183 | /* Store the whole floating-point state into THREAD using information | |
184 | from the corresponding (pseudo) registers. */ | |
185 | static void | |
56be3814 | 186 | store_fpregs (const struct regcache *regcache, struct proc *thread, int regno) |
da59e081 JM |
187 | { |
188 | mach_msg_type_number_t count = i386_FLOAT_STATE_COUNT; | |
189 | struct i386_float_state state; | |
190 | error_t err; | |
c5aa993b | 191 | |
da59e081 JM |
192 | err = thread_get_state (thread->port, i386_FLOAT_STATE, |
193 | (thread_state_t) &state, &count); | |
194 | if (err) | |
c906108c | 195 | { |
8a3fe4f8 | 196 | warning (_("Couldn't fetch floating-point state from %s"), |
da59e081 JM |
197 | proc_string (thread)); |
198 | return; | |
c906108c | 199 | } |
c5aa993b | 200 | |
383d750b | 201 | /* FIXME: kettenis/2001-07-15: Is this right? Should we somehow |
8262ee23 | 202 | take into account DEPRECATED_REGISTER_VALID like the old code did? */ |
56be3814 | 203 | i387_collect_fsave (regcache, regno, state.hw_state); |
383d750b | 204 | |
da59e081 JM |
205 | err = thread_set_state (thread->port, i386_FLOAT_STATE, |
206 | (thread_state_t) &state, i386_FLOAT_STATE_COUNT); | |
207 | if (err) | |
c906108c | 208 | { |
8a3fe4f8 | 209 | warning (_("Couldn't store floating-point state into %s"), |
da59e081 JM |
210 | proc_string (thread)); |
211 | return; | |
c906108c | 212 | } |
c906108c | 213 | } |
c5aa993b | 214 | |
da59e081 | 215 | /* Store at least register REGNO, or all regs if REGNO == -1. */ |
b4d1e8c7 | 216 | static void |
85a772a5 TS |
217 | gnu_store_registers (struct target_ops *ops, |
218 | struct regcache *regcache, int regno) | |
c5aa993b | 219 | { |
da59e081 | 220 | struct proc *thread; |
875f8d0e | 221 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c906108c | 222 | |
da59e081 | 223 | /* Make sure we know about new threads. */ |
c289427b | 224 | inf_update_procs (gnu_current_inf); |
c5aa993b | 225 | |
c289427b | 226 | thread = inf_tid_to_thread (gnu_current_inf, |
ca08a94c | 227 | ptid_get_lwp (inferior_ptid)); |
c906108c | 228 | if (!thread) |
617fd3b5 PA |
229 | error (_("Couldn't store registers into thread %s: No such thread"), |
230 | target_pid_to_str (inferior_ptid)); | |
c906108c | 231 | |
65e78234 | 232 | if (regno < I386_NUM_GREGS || regno == -1) |
c906108c | 233 | { |
da59e081 JM |
234 | thread_state_t state; |
235 | thread_state_data_t old_state; | |
236 | int was_aborted = thread->aborted; | |
237 | int was_valid = thread->state_valid; | |
fb557744 | 238 | int trace; |
c906108c | 239 | |
da59e081 JM |
240 | if (!was_aborted && was_valid) |
241 | memcpy (&old_state, &thread->state, sizeof (old_state)); | |
c906108c | 242 | |
da59e081 JM |
243 | state = proc_get_state (thread, 1); |
244 | if (!state) | |
245 | { | |
1777feb0 MS |
246 | warning (_("Couldn't store registers into %s"), |
247 | proc_string (thread)); | |
da59e081 JM |
248 | return; |
249 | } | |
c906108c | 250 | |
fb557744 MK |
251 | /* Save the T bit. We might try to restore the %eflags register |
252 | below, but changing the T bit would seriously confuse GDB. */ | |
253 | trace = ((struct i386_thread_state *)state)->efl & 0x100; | |
254 | ||
da59e081 JM |
255 | if (!was_aborted && was_valid) |
256 | /* See which registers have changed after aborting the thread. */ | |
257 | { | |
258 | int check_regno; | |
259 | ||
65e78234 | 260 | for (check_regno = 0; check_regno < I386_NUM_GREGS; check_regno++) |
da59e081 JM |
261 | if ((thread->fetched_regs & (1 << check_regno)) |
262 | && memcpy (REG_ADDR (&old_state, check_regno), | |
263 | REG_ADDR (state, check_regno), | |
875f8d0e | 264 | register_size (gdbarch, check_regno))) |
da59e081 JM |
265 | /* Register CHECK_REGNO has changed! Ack! */ |
266 | { | |
8a3fe4f8 | 267 | warning (_("Register %s changed after the thread was aborted"), |
875f8d0e | 268 | gdbarch_register_name (gdbarch, check_regno)); |
da59e081 | 269 | if (regno >= 0 && regno != check_regno) |
383d750b | 270 | /* Update GDB's copy of the register. */ |
f6052080 | 271 | regcache_raw_supply (regcache, check_regno, |
23a6d369 | 272 | REG_ADDR (state, check_regno)); |
da59e081 | 273 | else |
1777feb0 MS |
274 | warning (_("... also writing this register! " |
275 | "Suspicious...")); | |
da59e081 JM |
276 | } |
277 | } | |
c906108c | 278 | |
da59e081 JM |
279 | if (regno == -1) |
280 | { | |
281 | int i; | |
383d750b | 282 | |
da59e081 | 283 | proc_debug (thread, "storing all registers"); |
c5aa993b | 284 | |
65e78234 | 285 | for (i = 0; i < I386_NUM_GREGS; i++) |
672c9795 | 286 | if (REG_VALID == regcache_register_status (regcache, i)) |
9b8607ce | 287 | regcache_raw_collect (regcache, i, REG_ADDR (state, i)); |
da59e081 JM |
288 | } |
289 | else | |
290 | { | |
c9f4d572 | 291 | proc_debug (thread, "storing register %s", |
875f8d0e | 292 | gdbarch_register_name (gdbarch, regno)); |
c906108c | 293 | |
672c9795 | 294 | gdb_assert (REG_VALID == regcache_register_status (regcache, regno)); |
ecac404d | 295 | regcache_raw_collect (regcache, regno, REG_ADDR (state, regno)); |
da59e081 | 296 | } |
fb557744 MK |
297 | |
298 | /* Restore the T bit. */ | |
299 | ((struct i386_thread_state *)state)->efl &= ~0x100; | |
300 | ((struct i386_thread_state *)state)->efl |= trace; | |
c906108c | 301 | } |
c5aa993b | 302 | |
65e78234 | 303 | if (regno >= I386_NUM_GREGS || regno == -1) |
da59e081 JM |
304 | { |
305 | proc_debug (thread, "storing floating-point registers"); | |
383d750b | 306 | |
56be3814 | 307 | store_fpregs (regcache, thread, regno); |
da59e081 | 308 | } |
c906108c | 309 | } |
b4d1e8c7 PA |
310 | |
311 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
312 | extern initialize_file_ftype _initialize_i386gnu_nat; | |
313 | ||
314 | void | |
315 | _initialize_i386gnu_nat (void) | |
316 | { | |
317 | struct target_ops *t; | |
318 | ||
319 | /* Fill in the generic GNU/Hurd methods. */ | |
320 | t = gnu_target (); | |
321 | ||
322 | t->to_fetch_registers = gnu_fetch_registers; | |
323 | t->to_store_registers = gnu_store_registers; | |
324 | ||
325 | /* Register the target. */ | |
326 | add_target (t); | |
327 | } |