Commit | Line | Data |
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da59e081 | 1 | /* Low level interface to i386 running the GNU Hurd. |
f6052080 | 2 | |
28e7fd62 | 3 | Copyright (C) 1992-2013 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> |
383d750b | 27 | #include <stdio.h> |
3303a276 | 28 | #include "gdb_string.h" |
c906108c SS |
29 | |
30 | #include <mach.h> | |
da59e081 | 31 | #include <mach_error.h> |
c906108c SS |
32 | #include <mach/message.h> |
33 | #include <mach/exception.h> | |
c906108c | 34 | |
4604bcad MK |
35 | #include "i386-tdep.h" |
36 | ||
c906108c | 37 | #include "gnu-nat.h" |
e750d25e | 38 | #include "i387-tdep.h" |
c906108c | 39 | |
57e76fac MS |
40 | #ifdef HAVE_SYS_PROCFS_H |
41 | # include <sys/procfs.h> | |
42 | # include "gregset.h" | |
43 | #endif | |
c906108c | 44 | |
da59e081 JM |
45 | /* Offset to the thread_state_t location where REG is stored. */ |
46 | #define REG_OFFSET(reg) offsetof (struct i386_thread_state, reg) | |
c906108c | 47 | |
383d750b MK |
48 | /* At REG_OFFSET[N] is the offset to the thread_state_t location where |
49 | the GDB register N is stored. */ | |
c5aa993b | 50 | static int reg_offset[] = |
c906108c | 51 | { |
c5aa993b JM |
52 | REG_OFFSET (eax), REG_OFFSET (ecx), REG_OFFSET (edx), REG_OFFSET (ebx), |
53 | REG_OFFSET (uesp), REG_OFFSET (ebp), REG_OFFSET (esi), REG_OFFSET (edi), | |
54 | REG_OFFSET (eip), REG_OFFSET (efl), REG_OFFSET (cs), REG_OFFSET (ss), | |
55 | REG_OFFSET (ds), REG_OFFSET (es), REG_OFFSET (fs), REG_OFFSET (gs) | |
c906108c SS |
56 | }; |
57 | ||
da59e081 | 58 | #define REG_ADDR(state, regnum) ((char *)(state) + reg_offset[regnum]) |
7f7fe91e | 59 | #define CREG_ADDR(state, regnum) ((const char *)(state) + reg_offset[regnum]) |
da59e081 | 60 | |
c906108c | 61 | \f |
3303a276 MK |
62 | /* Get the whole floating-point state of THREAD and record the values |
63 | of the corresponding (pseudo) registers. */ | |
64 | ||
da59e081 | 65 | static void |
56be3814 | 66 | fetch_fpregs (struct regcache *regcache, struct proc *thread) |
c906108c | 67 | { |
da59e081 JM |
68 | mach_msg_type_number_t count = i386_FLOAT_STATE_COUNT; |
69 | struct i386_float_state state; | |
da59e081 | 70 | error_t err; |
c906108c | 71 | |
da59e081 JM |
72 | err = thread_get_state (thread->port, i386_FLOAT_STATE, |
73 | (thread_state_t) &state, &count); | |
74 | if (err) | |
c906108c | 75 | { |
8a3fe4f8 | 76 | warning (_("Couldn't fetch floating-point state from %s"), |
da59e081 JM |
77 | proc_string (thread)); |
78 | return; | |
c906108c | 79 | } |
da59e081 | 80 | |
383d750b | 81 | if (!state.initialized) |
c906108c | 82 | { |
3303a276 | 83 | /* The floating-point state isn't initialized. */ |
56be3814 | 84 | i387_supply_fsave (regcache, -1, NULL); |
3303a276 MK |
85 | } |
86 | else | |
87 | { | |
88 | /* Supply the floating-point registers. */ | |
56be3814 | 89 | i387_supply_fsave (regcache, -1, state.hw_state); |
c906108c SS |
90 | } |
91 | } | |
da59e081 | 92 | |
57e76fac MS |
93 | #ifdef HAVE_SYS_PROCFS_H |
94 | /* These two calls are used by the core-regset.c code for | |
95 | reading ELF core files. */ | |
96 | void | |
7f7fe91e | 97 | supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregs) |
57e76fac MS |
98 | { |
99 | int i; | |
65e78234 | 100 | for (i = 0; i < I386_NUM_GREGS; i++) |
7f7fe91e | 101 | regcache_raw_supply (regcache, i, CREG_ADDR (gregs, i)); |
57e76fac MS |
102 | } |
103 | ||
104 | void | |
7f7fe91e | 105 | supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregs) |
57e76fac | 106 | { |
7f7fe91e | 107 | i387_supply_fsave (regcache, -1, fpregs); |
57e76fac MS |
108 | } |
109 | #endif | |
110 | ||
da59e081 | 111 | /* Fetch register REGNO, or all regs if REGNO is -1. */ |
b4d1e8c7 | 112 | static void |
85a772a5 TS |
113 | gnu_fetch_registers (struct target_ops *ops, |
114 | struct regcache *regcache, int regno) | |
c906108c SS |
115 | { |
116 | struct proc *thread; | |
c5aa993b | 117 | |
da59e081 | 118 | /* Make sure we know about new threads. */ |
c289427b | 119 | inf_update_procs (gnu_current_inf); |
c906108c | 120 | |
c289427b | 121 | thread = inf_tid_to_thread (gnu_current_inf, |
617fd3b5 | 122 | ptid_get_tid (inferior_ptid)); |
c5aa993b | 123 | if (!thread) |
617fd3b5 PA |
124 | error (_("Can't fetch registers from thread %s: No such thread"), |
125 | target_pid_to_str (inferior_ptid)); | |
c906108c | 126 | |
65e78234 | 127 | if (regno < I386_NUM_GREGS || regno == -1) |
c906108c | 128 | { |
da59e081 | 129 | thread_state_t state; |
383d750b | 130 | |
da59e081 JM |
131 | /* This does the dirty work for us. */ |
132 | state = proc_get_state (thread, 0); | |
133 | if (!state) | |
c906108c | 134 | { |
8a3fe4f8 | 135 | warning (_("Couldn't fetch registers from %s"), |
da59e081 JM |
136 | proc_string (thread)); |
137 | return; | |
c906108c SS |
138 | } |
139 | ||
da59e081 | 140 | if (regno == -1) |
c906108c | 141 | { |
da59e081 | 142 | int i; |
383d750b | 143 | |
da59e081 | 144 | proc_debug (thread, "fetching all register"); |
383d750b | 145 | |
65e78234 | 146 | for (i = 0; i < I386_NUM_GREGS; i++) |
56be3814 | 147 | regcache_raw_supply (regcache, i, REG_ADDR (state, i)); |
da59e081 | 148 | thread->fetched_regs = ~0; |
c906108c SS |
149 | } |
150 | else | |
151 | { | |
c9f4d572 | 152 | proc_debug (thread, "fetching register %s", |
875f8d0e UW |
153 | gdbarch_register_name (get_regcache_arch (regcache), |
154 | regno)); | |
383d750b | 155 | |
56be3814 | 156 | regcache_raw_supply (regcache, regno, |
23a6d369 | 157 | REG_ADDR (state, regno)); |
da59e081 | 158 | thread->fetched_regs |= (1 << regno); |
c906108c SS |
159 | } |
160 | } | |
da59e081 | 161 | |
65e78234 | 162 | if (regno >= I386_NUM_GREGS || regno == -1) |
da59e081 JM |
163 | { |
164 | proc_debug (thread, "fetching floating-point registers"); | |
383d750b | 165 | |
56be3814 | 166 | fetch_fpregs (regcache, thread); |
da59e081 | 167 | } |
c906108c SS |
168 | } |
169 | \f | |
da59e081 JM |
170 | |
171 | /* Store the whole floating-point state into THREAD using information | |
172 | from the corresponding (pseudo) registers. */ | |
173 | static void | |
56be3814 | 174 | store_fpregs (const struct regcache *regcache, struct proc *thread, int regno) |
da59e081 JM |
175 | { |
176 | mach_msg_type_number_t count = i386_FLOAT_STATE_COUNT; | |
177 | struct i386_float_state state; | |
178 | error_t err; | |
c5aa993b | 179 | |
da59e081 JM |
180 | err = thread_get_state (thread->port, i386_FLOAT_STATE, |
181 | (thread_state_t) &state, &count); | |
182 | if (err) | |
c906108c | 183 | { |
8a3fe4f8 | 184 | warning (_("Couldn't fetch floating-point state from %s"), |
da59e081 JM |
185 | proc_string (thread)); |
186 | return; | |
c906108c | 187 | } |
c5aa993b | 188 | |
383d750b | 189 | /* FIXME: kettenis/2001-07-15: Is this right? Should we somehow |
8262ee23 | 190 | take into account DEPRECATED_REGISTER_VALID like the old code did? */ |
56be3814 | 191 | i387_collect_fsave (regcache, regno, state.hw_state); |
383d750b | 192 | |
da59e081 JM |
193 | err = thread_set_state (thread->port, i386_FLOAT_STATE, |
194 | (thread_state_t) &state, i386_FLOAT_STATE_COUNT); | |
195 | if (err) | |
c906108c | 196 | { |
8a3fe4f8 | 197 | warning (_("Couldn't store floating-point state into %s"), |
da59e081 JM |
198 | proc_string (thread)); |
199 | return; | |
c906108c | 200 | } |
c906108c | 201 | } |
c5aa993b | 202 | |
da59e081 | 203 | /* Store at least register REGNO, or all regs if REGNO == -1. */ |
b4d1e8c7 | 204 | static void |
85a772a5 TS |
205 | gnu_store_registers (struct target_ops *ops, |
206 | struct regcache *regcache, int regno) | |
c5aa993b | 207 | { |
da59e081 | 208 | struct proc *thread; |
875f8d0e | 209 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c906108c | 210 | |
da59e081 | 211 | /* Make sure we know about new threads. */ |
c289427b | 212 | inf_update_procs (gnu_current_inf); |
c5aa993b | 213 | |
c289427b | 214 | thread = inf_tid_to_thread (gnu_current_inf, |
617fd3b5 | 215 | ptid_get_tid (inferior_ptid)); |
c906108c | 216 | if (!thread) |
617fd3b5 PA |
217 | error (_("Couldn't store registers into thread %s: No such thread"), |
218 | target_pid_to_str (inferior_ptid)); | |
c906108c | 219 | |
65e78234 | 220 | if (regno < I386_NUM_GREGS || regno == -1) |
c906108c | 221 | { |
da59e081 JM |
222 | thread_state_t state; |
223 | thread_state_data_t old_state; | |
224 | int was_aborted = thread->aborted; | |
225 | int was_valid = thread->state_valid; | |
fb557744 | 226 | int trace; |
c906108c | 227 | |
da59e081 JM |
228 | if (!was_aborted && was_valid) |
229 | memcpy (&old_state, &thread->state, sizeof (old_state)); | |
c906108c | 230 | |
da59e081 JM |
231 | state = proc_get_state (thread, 1); |
232 | if (!state) | |
233 | { | |
1777feb0 MS |
234 | warning (_("Couldn't store registers into %s"), |
235 | proc_string (thread)); | |
da59e081 JM |
236 | return; |
237 | } | |
c906108c | 238 | |
fb557744 MK |
239 | /* Save the T bit. We might try to restore the %eflags register |
240 | below, but changing the T bit would seriously confuse GDB. */ | |
241 | trace = ((struct i386_thread_state *)state)->efl & 0x100; | |
242 | ||
da59e081 JM |
243 | if (!was_aborted && was_valid) |
244 | /* See which registers have changed after aborting the thread. */ | |
245 | { | |
246 | int check_regno; | |
247 | ||
65e78234 | 248 | for (check_regno = 0; check_regno < I386_NUM_GREGS; check_regno++) |
da59e081 JM |
249 | if ((thread->fetched_regs & (1 << check_regno)) |
250 | && memcpy (REG_ADDR (&old_state, check_regno), | |
251 | REG_ADDR (state, check_regno), | |
875f8d0e | 252 | register_size (gdbarch, check_regno))) |
da59e081 JM |
253 | /* Register CHECK_REGNO has changed! Ack! */ |
254 | { | |
8a3fe4f8 | 255 | warning (_("Register %s changed after the thread was aborted"), |
875f8d0e | 256 | gdbarch_register_name (gdbarch, check_regno)); |
da59e081 | 257 | if (regno >= 0 && regno != check_regno) |
383d750b | 258 | /* Update GDB's copy of the register. */ |
f6052080 | 259 | regcache_raw_supply (regcache, check_regno, |
23a6d369 | 260 | REG_ADDR (state, check_regno)); |
da59e081 | 261 | else |
1777feb0 MS |
262 | warning (_("... also writing this register! " |
263 | "Suspicious...")); | |
da59e081 JM |
264 | } |
265 | } | |
c906108c | 266 | |
da59e081 JM |
267 | if (regno == -1) |
268 | { | |
269 | int i; | |
383d750b | 270 | |
da59e081 | 271 | proc_debug (thread, "storing all registers"); |
c5aa993b | 272 | |
65e78234 | 273 | for (i = 0; i < I386_NUM_GREGS; i++) |
672c9795 | 274 | if (REG_VALID == regcache_register_status (regcache, i)) |
9b8607ce | 275 | regcache_raw_collect (regcache, i, REG_ADDR (state, i)); |
da59e081 JM |
276 | } |
277 | else | |
278 | { | |
c9f4d572 | 279 | proc_debug (thread, "storing register %s", |
875f8d0e | 280 | gdbarch_register_name (gdbarch, regno)); |
c906108c | 281 | |
672c9795 | 282 | gdb_assert (REG_VALID == regcache_register_status (regcache, regno)); |
ecac404d | 283 | regcache_raw_collect (regcache, regno, REG_ADDR (state, regno)); |
da59e081 | 284 | } |
fb557744 MK |
285 | |
286 | /* Restore the T bit. */ | |
287 | ((struct i386_thread_state *)state)->efl &= ~0x100; | |
288 | ((struct i386_thread_state *)state)->efl |= trace; | |
c906108c | 289 | } |
c5aa993b | 290 | |
65e78234 | 291 | if (regno >= I386_NUM_GREGS || regno == -1) |
da59e081 JM |
292 | { |
293 | proc_debug (thread, "storing floating-point registers"); | |
383d750b | 294 | |
56be3814 | 295 | store_fpregs (regcache, thread, regno); |
da59e081 | 296 | } |
c906108c | 297 | } |
b4d1e8c7 PA |
298 | |
299 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
300 | extern initialize_file_ftype _initialize_i386gnu_nat; | |
301 | ||
302 | void | |
303 | _initialize_i386gnu_nat (void) | |
304 | { | |
305 | struct target_ops *t; | |
306 | ||
307 | /* Fill in the generic GNU/Hurd methods. */ | |
308 | t = gnu_target (); | |
309 | ||
310 | t->to_fetch_registers = gnu_fetch_registers; | |
311 | t->to_store_registers = gnu_store_registers; | |
312 | ||
313 | /* Register the target. */ | |
314 | add_target (t); | |
315 | } |