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4c38e0a4 | 1 | /* Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
68070c10 PA |
2 | |
3 | This file is part of GDB. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 7 | the Free Software Foundation; either version 3 of the License, or |
68070c10 PA |
8 | (at your option) any later version. |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
68070c10 PA |
17 | |
18 | #include "server.h" | |
19 | #include "win32-low.h" | |
aa5ca48f | 20 | #include "i386-low.h" |
68070c10 | 21 | |
54709339 PM |
22 | #ifndef CONTEXT_EXTENDED_REGISTERS |
23 | #define CONTEXT_EXTENDED_REGISTERS 0 | |
24 | #endif | |
25 | ||
68070c10 PA |
26 | #define FCS_REGNUM 27 |
27 | #define FOP_REGNUM 31 | |
28 | ||
29 | #define FLAG_TRACE_BIT 0x100 | |
30 | ||
54709339 PM |
31 | #ifdef __x86_64 |
32 | /* Defined in auto-generated file reg-i386.c. */ | |
33 | void init_registers_amd64 (void); | |
34 | #else | |
d05b4ac3 UW |
35 | /* Defined in auto-generated file reg-i386.c. */ |
36 | void init_registers_i386 (void); | |
54709339 | 37 | #endif |
d05b4ac3 | 38 | |
aa5ca48f | 39 | static struct i386_debug_reg_state debug_reg_state; |
68070c10 | 40 | |
34b34921 PA |
41 | static int debug_registers_changed = 0; |
42 | static int debug_registers_used = 0; | |
43 | ||
aa5ca48f DE |
44 | /* Update the inferior's debug register REGNUM from STATE. */ |
45 | ||
46 | void | |
47 | i386_dr_low_set_addr (const struct i386_debug_reg_state *state, int regnum) | |
48 | { | |
49 | if (! (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR)) | |
50 | fatal ("Invalid debug register %d", regnum); | |
51 | ||
52 | /* debug_reg_state.dr_mirror is already set. | |
53 | Just notify i386_set_thread_context, i386_thread_added | |
54 | that the registers need to be updated. */ | |
55 | debug_registers_changed = 1; | |
56 | debug_registers_used = 1; | |
57 | } | |
58 | ||
59 | /* Update the inferior's DR7 debug control register from STATE. */ | |
60 | ||
61 | void | |
62 | i386_dr_low_set_control (const struct i386_debug_reg_state *state) | |
63 | { | |
64 | /* debug_reg_state.dr_control_mirror is already set. | |
65 | Just notify i386_set_thread_context, i386_thread_added | |
66 | that the registers need to be updated. */ | |
67 | debug_registers_changed = 1; | |
68 | debug_registers_used = 1; | |
69 | } | |
70 | ||
71 | /* Get the value of the DR6 debug status register from the inferior | |
72 | and record it in STATE. */ | |
73 | ||
74 | void | |
75 | i386_dr_low_get_status (struct i386_debug_reg_state *state) | |
76 | { | |
77 | /* We don't need to do anything here, the last call to thread_rec for | |
78 | current_event.dwThreadId id has already set it. */ | |
79 | } | |
80 | ||
81 | /* Watchpoint support. */ | |
82 | ||
83 | static int | |
84 | i386_insert_point (char type, CORE_ADDR addr, int len) | |
85 | { | |
86 | switch (type) | |
87 | { | |
88 | case '2': | |
89 | case '3': | |
90 | case '4': | |
91 | return i386_low_insert_watchpoint (&debug_reg_state, | |
92 | type, addr, len); | |
93 | default: | |
94 | /* Unsupported. */ | |
95 | return 1; | |
96 | } | |
97 | } | |
98 | ||
99 | static int | |
100 | i386_remove_point (char type, CORE_ADDR addr, int len) | |
101 | { | |
102 | switch (type) | |
103 | { | |
104 | case '2': | |
105 | case '3': | |
106 | case '4': | |
107 | return i386_low_remove_watchpoint (&debug_reg_state, | |
108 | type, addr, len); | |
109 | default: | |
110 | /* Unsupported. */ | |
111 | return 1; | |
112 | } | |
113 | } | |
114 | ||
115 | static int | |
116 | i386_stopped_by_watchpoint (void) | |
117 | { | |
118 | return i386_low_stopped_by_watchpoint (&debug_reg_state); | |
119 | } | |
120 | ||
121 | static CORE_ADDR | |
122 | i386_stopped_data_address (void) | |
123 | { | |
124 | CORE_ADDR addr; | |
125 | if (i386_low_stopped_data_address (&debug_reg_state, &addr)) | |
126 | return addr; | |
127 | return 0; | |
128 | } | |
129 | ||
68070c10 | 130 | static void |
34b34921 | 131 | i386_initial_stuff (void) |
68070c10 | 132 | { |
aa5ca48f | 133 | i386_low_init_dregs (&debug_reg_state); |
34b34921 PA |
134 | debug_registers_changed = 0; |
135 | debug_registers_used = 0; | |
68070c10 PA |
136 | } |
137 | ||
138 | static void | |
34b34921 | 139 | i386_get_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event) |
68070c10 | 140 | { |
912cf4ba PA |
141 | /* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if |
142 | the system doesn't support extended registers. */ | |
143 | static DWORD extended_registers = CONTEXT_EXTENDED_REGISTERS; | |
34b34921 | 144 | |
912cf4ba PA |
145 | again: |
146 | th->context.ContextFlags = (CONTEXT_FULL | |
147 | | CONTEXT_FLOATING_POINT | |
148 | | CONTEXT_DEBUG_REGISTERS | |
149 | | extended_registers); | |
150 | ||
151 | if (!GetThreadContext (th->h, &th->context)) | |
152 | { | |
153 | DWORD e = GetLastError (); | |
154 | ||
155 | if (extended_registers && e == ERROR_INVALID_PARAMETER) | |
156 | { | |
157 | extended_registers = 0; | |
158 | goto again; | |
159 | } | |
160 | ||
161 | error ("GetThreadContext failure %ld\n", (long) e); | |
162 | } | |
34b34921 PA |
163 | |
164 | debug_registers_changed = 0; | |
165 | ||
166 | if (th->tid == current_event->dwThreadId) | |
167 | { | |
168 | /* Copy dr values from the current thread. */ | |
aa5ca48f DE |
169 | struct i386_debug_reg_state *dr = &debug_reg_state; |
170 | dr->dr_mirror[0] = th->context.Dr0; | |
171 | dr->dr_mirror[1] = th->context.Dr1; | |
172 | dr->dr_mirror[2] = th->context.Dr2; | |
173 | dr->dr_mirror[3] = th->context.Dr3; | |
174 | dr->dr_status_mirror = th->context.Dr6; | |
175 | dr->dr_control_mirror = th->context.Dr7; | |
34b34921 | 176 | } |
68070c10 PA |
177 | } |
178 | ||
179 | static void | |
34b34921 | 180 | i386_set_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event) |
68070c10 | 181 | { |
34b34921 PA |
182 | if (debug_registers_changed) |
183 | { | |
aa5ca48f DE |
184 | struct i386_debug_reg_state *dr = &debug_reg_state; |
185 | th->context.Dr0 = dr->dr_mirror[0]; | |
186 | th->context.Dr1 = dr->dr_mirror[1]; | |
187 | th->context.Dr2 = dr->dr_mirror[2]; | |
188 | th->context.Dr3 = dr->dr_mirror[3]; | |
189 | /* th->context.Dr6 = dr->dr_status_mirror; | |
34b34921 | 190 | FIXME: should we set dr6 also ?? */ |
aa5ca48f | 191 | th->context.Dr7 = dr->dr_control_mirror; |
34b34921 PA |
192 | } |
193 | ||
194 | SetThreadContext (th->h, &th->context); | |
68070c10 PA |
195 | } |
196 | ||
68070c10 | 197 | static void |
34b34921 | 198 | i386_thread_added (win32_thread_info *th) |
68070c10 | 199 | { |
34b34921 PA |
200 | /* Set the debug registers for the new thread if they are used. */ |
201 | if (debug_registers_used) | |
68070c10 | 202 | { |
aa5ca48f | 203 | struct i386_debug_reg_state *dr = &debug_reg_state; |
34b34921 PA |
204 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
205 | GetThreadContext (th->h, &th->context); | |
206 | ||
aa5ca48f DE |
207 | th->context.Dr0 = dr->dr_mirror[0]; |
208 | th->context.Dr1 = dr->dr_mirror[1]; | |
209 | th->context.Dr2 = dr->dr_mirror[2]; | |
210 | th->context.Dr3 = dr->dr_mirror[3]; | |
211 | /* th->context.Dr6 = dr->dr_status_mirror; | |
34b34921 | 212 | FIXME: should we set dr6 also ?? */ |
aa5ca48f | 213 | th->context.Dr7 = dr->dr_control_mirror; |
34b34921 PA |
214 | |
215 | SetThreadContext (th->h, &th->context); | |
216 | th->context.ContextFlags = 0; | |
68070c10 | 217 | } |
68070c10 PA |
218 | } |
219 | ||
220 | static void | |
34b34921 | 221 | i386_single_step (win32_thread_info *th) |
68070c10 PA |
222 | { |
223 | th->context.EFlags |= FLAG_TRACE_BIT; | |
224 | } | |
225 | ||
54709339 PM |
226 | #ifndef __x86_64 |
227 | ||
68070c10 PA |
228 | /* An array of offset mappings into a Win32 Context structure. |
229 | This is a one-to-one mapping which is indexed by gdb's register | |
230 | numbers. It retrieves an offset into the context structure where | |
231 | the 4 byte register is located. | |
232 | An offset value of -1 indicates that Win32 does not provide this | |
233 | register in it's CONTEXT structure. In this case regptr will return | |
234 | a pointer into a dummy register. */ | |
235 | #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) | |
236 | static const int mappings[] = { | |
237 | context_offset (Eax), | |
238 | context_offset (Ecx), | |
239 | context_offset (Edx), | |
240 | context_offset (Ebx), | |
241 | context_offset (Esp), | |
242 | context_offset (Ebp), | |
243 | context_offset (Esi), | |
244 | context_offset (Edi), | |
245 | context_offset (Eip), | |
246 | context_offset (EFlags), | |
247 | context_offset (SegCs), | |
248 | context_offset (SegSs), | |
249 | context_offset (SegDs), | |
250 | context_offset (SegEs), | |
251 | context_offset (SegFs), | |
252 | context_offset (SegGs), | |
253 | context_offset (FloatSave.RegisterArea[0 * 10]), | |
254 | context_offset (FloatSave.RegisterArea[1 * 10]), | |
255 | context_offset (FloatSave.RegisterArea[2 * 10]), | |
256 | context_offset (FloatSave.RegisterArea[3 * 10]), | |
257 | context_offset (FloatSave.RegisterArea[4 * 10]), | |
258 | context_offset (FloatSave.RegisterArea[5 * 10]), | |
259 | context_offset (FloatSave.RegisterArea[6 * 10]), | |
260 | context_offset (FloatSave.RegisterArea[7 * 10]), | |
261 | context_offset (FloatSave.ControlWord), | |
262 | context_offset (FloatSave.StatusWord), | |
263 | context_offset (FloatSave.TagWord), | |
264 | context_offset (FloatSave.ErrorSelector), | |
265 | context_offset (FloatSave.ErrorOffset), | |
266 | context_offset (FloatSave.DataSelector), | |
267 | context_offset (FloatSave.DataOffset), | |
268 | context_offset (FloatSave.ErrorSelector), | |
269 | /* XMM0-7 */ | |
270 | context_offset (ExtendedRegisters[10 * 16]), | |
271 | context_offset (ExtendedRegisters[11 * 16]), | |
272 | context_offset (ExtendedRegisters[12 * 16]), | |
273 | context_offset (ExtendedRegisters[13 * 16]), | |
274 | context_offset (ExtendedRegisters[14 * 16]), | |
275 | context_offset (ExtendedRegisters[15 * 16]), | |
276 | context_offset (ExtendedRegisters[16 * 16]), | |
277 | context_offset (ExtendedRegisters[17 * 16]), | |
278 | /* MXCSR */ | |
279 | context_offset (ExtendedRegisters[24]) | |
280 | }; | |
281 | #undef context_offset | |
282 | ||
54709339 PM |
283 | #else /* __x86_64 */ |
284 | ||
285 | #define context_offset(x) (offsetof (CONTEXT, x)) | |
286 | static const int mappings[] = | |
287 | { | |
288 | context_offset (Rax), | |
289 | context_offset (Rbx), | |
290 | context_offset (Rcx), | |
291 | context_offset (Rdx), | |
292 | context_offset (Rsi), | |
293 | context_offset (Rdi), | |
294 | context_offset (Rbp), | |
295 | context_offset (Rsp), | |
296 | context_offset (R8), | |
297 | context_offset (R9), | |
298 | context_offset (R10), | |
299 | context_offset (R11), | |
300 | context_offset (R12), | |
301 | context_offset (R13), | |
302 | context_offset (R14), | |
303 | context_offset (R15), | |
304 | context_offset (Rip), | |
305 | context_offset (EFlags), | |
306 | context_offset (SegCs), | |
307 | context_offset (SegSs), | |
308 | context_offset (SegDs), | |
309 | context_offset (SegEs), | |
310 | context_offset (SegFs), | |
311 | context_offset (SegGs), | |
312 | context_offset (FloatSave.FloatRegisters[0]), | |
313 | context_offset (FloatSave.FloatRegisters[1]), | |
314 | context_offset (FloatSave.FloatRegisters[2]), | |
315 | context_offset (FloatSave.FloatRegisters[3]), | |
316 | context_offset (FloatSave.FloatRegisters[4]), | |
317 | context_offset (FloatSave.FloatRegisters[5]), | |
318 | context_offset (FloatSave.FloatRegisters[6]), | |
319 | context_offset (FloatSave.FloatRegisters[7]), | |
320 | context_offset (FloatSave.ControlWord), | |
321 | context_offset (FloatSave.StatusWord), | |
322 | context_offset (FloatSave.TagWord), | |
323 | context_offset (FloatSave.ErrorSelector), | |
324 | context_offset (FloatSave.ErrorOffset), | |
325 | context_offset (FloatSave.DataSelector), | |
326 | context_offset (FloatSave.DataOffset), | |
327 | context_offset (FloatSave.ErrorSelector) | |
328 | /* XMM0-7 */ , | |
329 | context_offset (Xmm0), | |
330 | context_offset (Xmm1), | |
331 | context_offset (Xmm2), | |
332 | context_offset (Xmm3), | |
333 | context_offset (Xmm4), | |
334 | context_offset (Xmm5), | |
335 | context_offset (Xmm6), | |
336 | context_offset (Xmm7), | |
337 | context_offset (Xmm8), | |
338 | context_offset (Xmm9), | |
339 | context_offset (Xmm10), | |
340 | context_offset (Xmm11), | |
341 | context_offset (Xmm12), | |
342 | context_offset (Xmm13), | |
343 | context_offset (Xmm14), | |
344 | context_offset (Xmm15), | |
345 | /* MXCSR */ | |
346 | context_offset (FloatSave.MxCsr) | |
347 | }; | |
348 | #undef context_offset | |
349 | ||
350 | #endif /* __x86_64 */ | |
351 | ||
34b34921 PA |
352 | /* Fetch register from gdbserver regcache data. */ |
353 | static void | |
442ea881 PA |
354 | i386_fetch_inferior_register (struct regcache *regcache, |
355 | win32_thread_info *th, int r) | |
34b34921 PA |
356 | { |
357 | char *context_offset = (char *) &th->context + mappings[r]; | |
358 | ||
359 | long l; | |
360 | if (r == FCS_REGNUM) | |
361 | { | |
362 | l = *((long *) context_offset) & 0xffff; | |
442ea881 | 363 | supply_register (regcache, r, (char *) &l); |
34b34921 PA |
364 | } |
365 | else if (r == FOP_REGNUM) | |
366 | { | |
367 | l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); | |
442ea881 | 368 | supply_register (regcache, r, (char *) &l); |
34b34921 PA |
369 | } |
370 | else | |
442ea881 | 371 | supply_register (regcache, r, context_offset); |
34b34921 PA |
372 | } |
373 | ||
374 | /* Store a new register value into the thread context of TH. */ | |
375 | static void | |
442ea881 PA |
376 | i386_store_inferior_register (struct regcache *regcache, |
377 | win32_thread_info *th, int r) | |
34b34921 PA |
378 | { |
379 | char *context_offset = (char *) &th->context + mappings[r]; | |
442ea881 | 380 | collect_register (regcache, r, context_offset); |
34b34921 PA |
381 | } |
382 | ||
912cf4ba PA |
383 | static const unsigned char i386_win32_breakpoint = 0xcc; |
384 | #define i386_win32_breakpoint_len 1 | |
385 | ||
54709339 PM |
386 | static void |
387 | init_windows_x86 (void) | |
388 | { | |
389 | #ifdef __x86_64 | |
390 | init_registers_amd64 (); | |
391 | #else | |
392 | init_registers_i386 (); | |
393 | #endif | |
394 | } | |
395 | ||
68070c10 | 396 | struct win32_target_ops the_low_target = { |
54709339 | 397 | init_windows_x86, |
68070c10 | 398 | sizeof (mappings) / sizeof (mappings[0]), |
34b34921 PA |
399 | i386_initial_stuff, |
400 | i386_get_thread_context, | |
401 | i386_set_thread_context, | |
402 | i386_thread_added, | |
403 | i386_fetch_inferior_register, | |
404 | i386_store_inferior_register, | |
405 | i386_single_step, | |
912cf4ba PA |
406 | &i386_win32_breakpoint, |
407 | i386_win32_breakpoint_len, | |
aa5ca48f DE |
408 | i386_insert_point, |
409 | i386_remove_point, | |
410 | i386_stopped_by_watchpoint, | |
411 | i386_stopped_data_address | |
68070c10 | 412 | }; |