Commit | Line | Data |
---|---|---|
da59e081 | 1 | /* Low level interface to i386 running the GNU Hurd. |
b6ba6518 KB |
2 | Copyright 1992, 1995, 1996, 1998, 2000, 2001 |
3 | 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 | |
9 | the Free Software Foundation; either version 2 of the License, or | |
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 JM |
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. */ | |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "floatformat.h" | |
4e052eda | 25 | #include "regcache.h" |
c906108c | 26 | |
780a49fa | 27 | #include "gdb_assert.h" |
c906108c | 28 | #include <errno.h> |
383d750b | 29 | #include <stdio.h> |
c906108c SS |
30 | |
31 | #include <mach.h> | |
da59e081 | 32 | #include <mach_error.h> |
c906108c SS |
33 | #include <mach/message.h> |
34 | #include <mach/exception.h> | |
c906108c SS |
35 | |
36 | #include "gnu-nat.h" | |
383d750b | 37 | #include "i387-nat.h" |
c906108c | 38 | |
c906108c | 39 | |
da59e081 JM |
40 | /* Offset to the thread_state_t location where REG is stored. */ |
41 | #define REG_OFFSET(reg) offsetof (struct i386_thread_state, reg) | |
c906108c | 42 | |
383d750b MK |
43 | /* At REG_OFFSET[N] is the offset to the thread_state_t location where |
44 | the GDB register N is stored. */ | |
c5aa993b | 45 | static int reg_offset[] = |
c906108c | 46 | { |
c5aa993b JM |
47 | REG_OFFSET (eax), REG_OFFSET (ecx), REG_OFFSET (edx), REG_OFFSET (ebx), |
48 | REG_OFFSET (uesp), REG_OFFSET (ebp), REG_OFFSET (esi), REG_OFFSET (edi), | |
49 | REG_OFFSET (eip), REG_OFFSET (efl), REG_OFFSET (cs), REG_OFFSET (ss), | |
50 | REG_OFFSET (ds), REG_OFFSET (es), REG_OFFSET (fs), REG_OFFSET (gs) | |
c906108c SS |
51 | }; |
52 | ||
da59e081 JM |
53 | #define REG_ADDR(state, regnum) ((char *)(state) + reg_offset[regnum]) |
54 | ||
c906108c | 55 | \f |
da59e081 JM |
56 | /* Get the whole floating-point state of THREAD and record the |
57 | values of the corresponding (pseudo) registers. */ | |
58 | static void | |
59 | fetch_fpregs (struct proc *thread) | |
c906108c | 60 | { |
da59e081 JM |
61 | mach_msg_type_number_t count = i386_FLOAT_STATE_COUNT; |
62 | struct i386_float_state state; | |
da59e081 | 63 | error_t err; |
c906108c | 64 | |
da59e081 JM |
65 | err = thread_get_state (thread->port, i386_FLOAT_STATE, |
66 | (thread_state_t) &state, &count); | |
67 | if (err) | |
c906108c | 68 | { |
da59e081 JM |
69 | warning ("Couldn't fetch floating-point state from %s", |
70 | proc_string (thread)); | |
71 | return; | |
c906108c | 72 | } |
da59e081 | 73 | |
383d750b | 74 | if (!state.initialized) |
da59e081 | 75 | /* The floating-point state isn't initialized. */ |
c906108c | 76 | { |
383d750b MK |
77 | int i; |
78 | ||
da59e081 JM |
79 | for (i = FP0_REGNUM; i <= FP7_REGNUM; i++) |
80 | supply_register (i, NULL); | |
383d750b | 81 | for (i = FCTRL_REGNUM; i <= FOP_REGNUM; i++) |
da59e081 JM |
82 | supply_register (i, NULL); |
83 | ||
84 | return; | |
c906108c | 85 | } |
da59e081 JM |
86 | |
87 | /* Supply the floating-point registers. */ | |
383d750b | 88 | i387_supply_fsave (state.hw_state); |
c906108c | 89 | } |
da59e081 JM |
90 | |
91 | /* Fetch register REGNO, or all regs if REGNO is -1. */ | |
c906108c | 92 | void |
da59e081 | 93 | gnu_fetch_registers (int regno) |
c906108c SS |
94 | { |
95 | struct proc *thread; | |
c5aa993b | 96 | |
da59e081 JM |
97 | /* Make sure we know about new threads. */ |
98 | inf_update_procs (current_inferior); | |
c906108c | 99 | |
39f77062 | 100 | thread = inf_tid_to_thread (current_inferior, PIDGET (inferior_ptid)); |
c5aa993b | 101 | if (!thread) |
da59e081 | 102 | error ("Can't fetch registers from thread %d: No such thread", |
39f77062 | 103 | PIDGET (inferior_ptid)); |
c906108c | 104 | |
da59e081 | 105 | if (regno < NUM_GREGS || regno == -1) |
c906108c | 106 | { |
da59e081 | 107 | thread_state_t state; |
383d750b | 108 | |
da59e081 JM |
109 | /* This does the dirty work for us. */ |
110 | state = proc_get_state (thread, 0); | |
111 | if (!state) | |
c906108c | 112 | { |
da59e081 JM |
113 | warning ("Couldn't fetch registers from %s", |
114 | proc_string (thread)); | |
115 | return; | |
c906108c SS |
116 | } |
117 | ||
da59e081 | 118 | if (regno == -1) |
c906108c | 119 | { |
da59e081 | 120 | int i; |
383d750b | 121 | |
da59e081 | 122 | proc_debug (thread, "fetching all register"); |
383d750b | 123 | |
da59e081 JM |
124 | for (i = 0; i < NUM_GREGS; i++) |
125 | supply_register (i, REG_ADDR (state, i)); | |
126 | thread->fetched_regs = ~0; | |
c906108c SS |
127 | } |
128 | else | |
129 | { | |
da59e081 | 130 | proc_debug (thread, "fetching register %s", REGISTER_NAME (regno)); |
383d750b | 131 | |
da59e081 JM |
132 | supply_register (regno, REG_ADDR (state, regno)); |
133 | thread->fetched_regs |= (1 << regno); | |
c906108c SS |
134 | } |
135 | } | |
da59e081 JM |
136 | |
137 | if (regno >= NUM_GREGS || regno == -1) | |
138 | { | |
139 | proc_debug (thread, "fetching floating-point registers"); | |
383d750b | 140 | |
da59e081 JM |
141 | fetch_fpregs (thread); |
142 | } | |
c906108c SS |
143 | } |
144 | \f | |
da59e081 JM |
145 | |
146 | /* Store the whole floating-point state into THREAD using information | |
147 | from the corresponding (pseudo) registers. */ | |
148 | static void | |
383d750b | 149 | store_fpregs (struct proc *thread, int regno) |
da59e081 JM |
150 | { |
151 | mach_msg_type_number_t count = i386_FLOAT_STATE_COUNT; | |
152 | struct i386_float_state state; | |
153 | error_t err; | |
c5aa993b | 154 | |
da59e081 JM |
155 | err = thread_get_state (thread->port, i386_FLOAT_STATE, |
156 | (thread_state_t) &state, &count); | |
157 | if (err) | |
c906108c | 158 | { |
da59e081 JM |
159 | warning ("Couldn't fetch floating-point state from %s", |
160 | proc_string (thread)); | |
161 | return; | |
c906108c | 162 | } |
c5aa993b | 163 | |
383d750b MK |
164 | /* FIXME: kettenis/2001-07-15: Is this right? Should we somehow |
165 | take into account REGISTER_VALID like the old code did? */ | |
166 | i387_fill_fsave (state.hw_state, regno); | |
167 | ||
da59e081 JM |
168 | err = thread_set_state (thread->port, i386_FLOAT_STATE, |
169 | (thread_state_t) &state, i386_FLOAT_STATE_COUNT); | |
170 | if (err) | |
c906108c | 171 | { |
da59e081 JM |
172 | warning ("Couldn't store floating-point state into %s", |
173 | proc_string (thread)); | |
174 | return; | |
c906108c | 175 | } |
c906108c | 176 | } |
c5aa993b | 177 | |
da59e081 JM |
178 | /* Store at least register REGNO, or all regs if REGNO == -1. */ |
179 | void | |
180 | gnu_store_registers (int regno) | |
c5aa993b | 181 | { |
da59e081 | 182 | struct proc *thread; |
c906108c | 183 | |
da59e081 JM |
184 | /* Make sure we know about new threads. */ |
185 | inf_update_procs (current_inferior); | |
c5aa993b | 186 | |
39f77062 | 187 | thread = inf_tid_to_thread (current_inferior, PIDGET (inferior_ptid)); |
c906108c | 188 | if (!thread) |
da59e081 | 189 | error ("Couldn't store registers into thread %d: No such thread", |
39f77062 | 190 | PIDGET (inferior_ptid)); |
c906108c | 191 | |
da59e081 | 192 | if (regno < NUM_GREGS || regno == -1) |
c906108c | 193 | { |
da59e081 JM |
194 | thread_state_t state; |
195 | thread_state_data_t old_state; | |
196 | int was_aborted = thread->aborted; | |
197 | int was_valid = thread->state_valid; | |
fb557744 | 198 | int trace; |
c906108c | 199 | |
da59e081 JM |
200 | if (!was_aborted && was_valid) |
201 | memcpy (&old_state, &thread->state, sizeof (old_state)); | |
c906108c | 202 | |
da59e081 JM |
203 | state = proc_get_state (thread, 1); |
204 | if (!state) | |
205 | { | |
206 | warning ("Couldn't store registers into %s", proc_string (thread)); | |
207 | return; | |
208 | } | |
c906108c | 209 | |
fb557744 MK |
210 | /* Save the T bit. We might try to restore the %eflags register |
211 | below, but changing the T bit would seriously confuse GDB. */ | |
212 | trace = ((struct i386_thread_state *)state)->efl & 0x100; | |
213 | ||
da59e081 JM |
214 | if (!was_aborted && was_valid) |
215 | /* See which registers have changed after aborting the thread. */ | |
216 | { | |
217 | int check_regno; | |
218 | ||
219 | for (check_regno = 0; check_regno < NUM_GREGS; check_regno++) | |
220 | if ((thread->fetched_regs & (1 << check_regno)) | |
221 | && memcpy (REG_ADDR (&old_state, check_regno), | |
222 | REG_ADDR (state, check_regno), | |
223 | REGISTER_RAW_SIZE (check_regno))) | |
224 | /* Register CHECK_REGNO has changed! Ack! */ | |
225 | { | |
226 | warning ("Register %s changed after the thread was aborted", | |
227 | REGISTER_NAME (check_regno)); | |
228 | if (regno >= 0 && regno != check_regno) | |
383d750b | 229 | /* Update GDB's copy of the register. */ |
da59e081 JM |
230 | supply_register (check_regno, REG_ADDR (state, check_regno)); |
231 | else | |
232 | warning ("... also writing this register! Suspicious..."); | |
233 | } | |
234 | } | |
c906108c | 235 | |
da59e081 JM |
236 | #define fill(state, regno) \ |
237 | memcpy (REG_ADDR(state, regno), ®isters[REGISTER_BYTE (regno)], \ | |
238 | REGISTER_RAW_SIZE (regno)) | |
c906108c | 239 | |
da59e081 JM |
240 | if (regno == -1) |
241 | { | |
242 | int i; | |
383d750b | 243 | |
da59e081 | 244 | proc_debug (thread, "storing all registers"); |
c5aa993b | 245 | |
da59e081 JM |
246 | for (i = 0; i < NUM_GREGS; i++) |
247 | if (register_valid[i]) | |
248 | fill (state, i); | |
249 | } | |
250 | else | |
251 | { | |
252 | proc_debug (thread, "storing register %s", REGISTER_NAME (regno)); | |
c906108c | 253 | |
780a49fa | 254 | gdb_assert (register_valid[regno]); |
da59e081 JM |
255 | fill (state, regno); |
256 | } | |
fb557744 MK |
257 | |
258 | /* Restore the T bit. */ | |
259 | ((struct i386_thread_state *)state)->efl &= ~0x100; | |
260 | ((struct i386_thread_state *)state)->efl |= trace; | |
c906108c | 261 | } |
c5aa993b | 262 | |
da59e081 | 263 | #undef fill |
c906108c | 264 | |
da59e081 JM |
265 | if (regno >= NUM_GREGS || regno == -1) |
266 | { | |
267 | proc_debug (thread, "storing floating-point registers"); | |
383d750b MK |
268 | |
269 | store_fpregs (thread, regno); | |
da59e081 | 270 | } |
c906108c | 271 | } |