Commit | Line | Data |
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e2882c85 | 1 | /* Copyright (C) 2007-2018 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" | |
df7e5265 | 20 | #include "x86-low.h" |
22916b07 YQ |
21 | #include "x86-xstate.h" |
22 | #ifdef __x86_64__ | |
23 | #include "arch/amd64.h" | |
24 | #endif | |
25 | #include "arch/i386.h" | |
cc4d742f | 26 | #include "tdesc.h" |
68070c10 | 27 | |
54709339 PM |
28 | #ifndef CONTEXT_EXTENDED_REGISTERS |
29 | #define CONTEXT_EXTENDED_REGISTERS 0 | |
30 | #endif | |
31 | ||
68070c10 PA |
32 | #define FCS_REGNUM 27 |
33 | #define FOP_REGNUM 31 | |
34 | ||
35 | #define FLAG_TRACE_BIT 0x100 | |
36 | ||
df7e5265 | 37 | static struct x86_debug_reg_state debug_reg_state; |
68070c10 | 38 | |
0b360f19 SM |
39 | static void |
40 | update_debug_registers (thread_info *thread) | |
a2abc7de | 41 | { |
0b360f19 | 42 | win32_thread_info *th = (win32_thread_info *) thread_target_data (thread); |
a2abc7de | 43 | |
0b360f19 SM |
44 | /* The actual update is done later just before resuming the lwp, |
45 | we just mark that the registers need updating. */ | |
46 | th->debug_registers_changed = 1; | |
a2abc7de | 47 | } |
34b34921 | 48 | |
aa5ca48f DE |
49 | /* Update the inferior's debug register REGNUM from STATE. */ |
50 | ||
42995dbd | 51 | static void |
df7e5265 | 52 | x86_dr_low_set_addr (int regnum, CORE_ADDR addr) |
aa5ca48f | 53 | { |
0a5b1e09 | 54 | gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR); |
964e4306 | 55 | |
0b360f19 SM |
56 | /* Only update the threads of this process. */ |
57 | for_each_thread (current_thread->id.pid (), update_debug_registers); | |
964e4306 PA |
58 | } |
59 | ||
aa5ca48f DE |
60 | /* Update the inferior's DR7 debug control register from STATE. */ |
61 | ||
42995dbd | 62 | static void |
df7e5265 | 63 | x86_dr_low_set_control (unsigned long control) |
aa5ca48f | 64 | { |
a2abc7de | 65 | /* Only update the threads of this process. */ |
0b360f19 | 66 | for_each_thread (current_thread->id.pid (), update_debug_registers); |
a2abc7de PA |
67 | } |
68 | ||
69 | /* Return the current value of a DR register of the current thread's | |
70 | context. */ | |
71 | ||
72 | static DWORD64 | |
73 | win32_get_current_dr (int dr) | |
74 | { | |
c3de4d92 | 75 | win32_thread_info *th |
6afd337d | 76 | = (win32_thread_info *) thread_target_data (current_thread); |
a2abc7de PA |
77 | |
78 | win32_require_context (th); | |
79 | ||
80 | #define RET_DR(DR) \ | |
81 | case DR: \ | |
82 | return th->context.Dr ## DR | |
83 | ||
84 | switch (dr) | |
85 | { | |
86 | RET_DR (0); | |
87 | RET_DR (1); | |
88 | RET_DR (2); | |
89 | RET_DR (3); | |
90 | RET_DR (6); | |
91 | RET_DR (7); | |
92 | } | |
93 | ||
94 | #undef RET_DR | |
95 | ||
96 | gdb_assert_not_reached ("unhandled dr"); | |
97 | } | |
98 | ||
99 | static CORE_ADDR | |
100 | x86_dr_low_get_addr (int regnum) | |
101 | { | |
102 | gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR); | |
103 | ||
104 | return win32_get_current_dr (regnum - DR_FIRSTADDR); | |
aa5ca48f DE |
105 | } |
106 | ||
42995dbd | 107 | static unsigned long |
df7e5265 | 108 | x86_dr_low_get_control (void) |
964e4306 | 109 | { |
a2abc7de | 110 | return win32_get_current_dr (7); |
964e4306 PA |
111 | } |
112 | ||
aa5ca48f DE |
113 | /* Get the value of the DR6 debug status register from the inferior |
114 | and record it in STATE. */ | |
115 | ||
42995dbd | 116 | static unsigned long |
df7e5265 | 117 | x86_dr_low_get_status (void) |
aa5ca48f | 118 | { |
a2abc7de | 119 | return win32_get_current_dr (6); |
aa5ca48f DE |
120 | } |
121 | ||
42995dbd | 122 | /* Low-level function vector. */ |
df7e5265 | 123 | struct x86_dr_low_type x86_dr_low = |
42995dbd | 124 | { |
df7e5265 GB |
125 | x86_dr_low_set_control, |
126 | x86_dr_low_set_addr, | |
127 | x86_dr_low_get_addr, | |
128 | x86_dr_low_get_status, | |
129 | x86_dr_low_get_control, | |
42995dbd GB |
130 | sizeof (void *), |
131 | }; | |
132 | ||
802e8e6d | 133 | /* Breakpoint/watchpoint support. */ |
aa5ca48f DE |
134 | |
135 | static int | |
802e8e6d PA |
136 | i386_supports_z_point_type (char z_type) |
137 | { | |
138 | switch (z_type) | |
139 | { | |
140 | case Z_PACKET_WRITE_WP: | |
141 | case Z_PACKET_ACCESS_WP: | |
142 | return 1; | |
143 | default: | |
144 | return 0; | |
145 | } | |
146 | } | |
147 | ||
148 | static int | |
149 | i386_insert_point (enum raw_bkpt_type type, CORE_ADDR addr, | |
150 | int size, struct raw_breakpoint *bp) | |
aa5ca48f DE |
151 | { |
152 | switch (type) | |
153 | { | |
802e8e6d PA |
154 | case raw_bkpt_type_write_wp: |
155 | case raw_bkpt_type_access_wp: | |
a4165e94 | 156 | { |
802e8e6d PA |
157 | enum target_hw_bp_type hw_type |
158 | = raw_bkpt_type_to_target_hw_bp_type (type); | |
a4165e94 | 159 | |
df7e5265 GB |
160 | return x86_dr_insert_watchpoint (&debug_reg_state, |
161 | hw_type, addr, size); | |
a4165e94 | 162 | } |
aa5ca48f DE |
163 | default: |
164 | /* Unsupported. */ | |
165 | return 1; | |
166 | } | |
167 | } | |
168 | ||
169 | static int | |
802e8e6d PA |
170 | i386_remove_point (enum raw_bkpt_type type, CORE_ADDR addr, |
171 | int size, struct raw_breakpoint *bp) | |
aa5ca48f DE |
172 | { |
173 | switch (type) | |
174 | { | |
802e8e6d PA |
175 | case raw_bkpt_type_write_wp: |
176 | case raw_bkpt_type_access_wp: | |
a4165e94 | 177 | { |
802e8e6d PA |
178 | enum target_hw_bp_type hw_type |
179 | = raw_bkpt_type_to_target_hw_bp_type (type); | |
a4165e94 | 180 | |
df7e5265 GB |
181 | return x86_dr_remove_watchpoint (&debug_reg_state, |
182 | hw_type, addr, size); | |
a4165e94 | 183 | } |
aa5ca48f DE |
184 | default: |
185 | /* Unsupported. */ | |
186 | return 1; | |
187 | } | |
188 | } | |
189 | ||
190 | static int | |
df7e5265 | 191 | x86_stopped_by_watchpoint (void) |
aa5ca48f | 192 | { |
df7e5265 | 193 | return x86_dr_stopped_by_watchpoint (&debug_reg_state); |
aa5ca48f DE |
194 | } |
195 | ||
196 | static CORE_ADDR | |
df7e5265 | 197 | x86_stopped_data_address (void) |
aa5ca48f DE |
198 | { |
199 | CORE_ADDR addr; | |
df7e5265 | 200 | if (x86_dr_stopped_data_address (&debug_reg_state, &addr)) |
aa5ca48f DE |
201 | return addr; |
202 | return 0; | |
203 | } | |
204 | ||
68070c10 | 205 | static void |
34b34921 | 206 | i386_initial_stuff (void) |
68070c10 | 207 | { |
df7e5265 | 208 | x86_low_init_dregs (&debug_reg_state); |
68070c10 PA |
209 | } |
210 | ||
211 | static void | |
a2abc7de | 212 | i386_get_thread_context (win32_thread_info *th) |
68070c10 | 213 | { |
912cf4ba PA |
214 | /* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if |
215 | the system doesn't support extended registers. */ | |
216 | static DWORD extended_registers = CONTEXT_EXTENDED_REGISTERS; | |
34b34921 | 217 | |
912cf4ba PA |
218 | again: |
219 | th->context.ContextFlags = (CONTEXT_FULL | |
220 | | CONTEXT_FLOATING_POINT | |
221 | | CONTEXT_DEBUG_REGISTERS | |
222 | | extended_registers); | |
223 | ||
224 | if (!GetThreadContext (th->h, &th->context)) | |
225 | { | |
226 | DWORD e = GetLastError (); | |
227 | ||
228 | if (extended_registers && e == ERROR_INVALID_PARAMETER) | |
229 | { | |
230 | extended_registers = 0; | |
231 | goto again; | |
232 | } | |
233 | ||
234 | error ("GetThreadContext failure %ld\n", (long) e); | |
235 | } | |
68070c10 PA |
236 | } |
237 | ||
238 | static void | |
a2abc7de | 239 | i386_prepare_to_resume (win32_thread_info *th) |
68070c10 | 240 | { |
a2abc7de | 241 | if (th->debug_registers_changed) |
34b34921 | 242 | { |
df7e5265 | 243 | struct x86_debug_reg_state *dr = &debug_reg_state; |
a2abc7de PA |
244 | |
245 | win32_require_context (th); | |
246 | ||
aa5ca48f DE |
247 | th->context.Dr0 = dr->dr_mirror[0]; |
248 | th->context.Dr1 = dr->dr_mirror[1]; | |
249 | th->context.Dr2 = dr->dr_mirror[2]; | |
250 | th->context.Dr3 = dr->dr_mirror[3]; | |
8d26e50c | 251 | /* th->context.Dr6 = dr->dr_status_mirror; |
34b34921 | 252 | FIXME: should we set dr6 also ?? */ |
8d26e50c | 253 | th->context.Dr7 = dr->dr_control_mirror; |
34b34921 | 254 | |
a2abc7de PA |
255 | th->debug_registers_changed = 0; |
256 | } | |
68070c10 PA |
257 | } |
258 | ||
68070c10 | 259 | static void |
34b34921 | 260 | i386_thread_added (win32_thread_info *th) |
68070c10 | 261 | { |
a2abc7de | 262 | th->debug_registers_changed = 1; |
68070c10 PA |
263 | } |
264 | ||
265 | static void | |
34b34921 | 266 | i386_single_step (win32_thread_info *th) |
68070c10 PA |
267 | { |
268 | th->context.EFlags |= FLAG_TRACE_BIT; | |
269 | } | |
270 | ||
1c07cc19 | 271 | #ifndef __x86_64__ |
54709339 | 272 | |
68070c10 PA |
273 | /* An array of offset mappings into a Win32 Context structure. |
274 | This is a one-to-one mapping which is indexed by gdb's register | |
275 | numbers. It retrieves an offset into the context structure where | |
276 | the 4 byte register is located. | |
277 | An offset value of -1 indicates that Win32 does not provide this | |
278 | register in it's CONTEXT structure. In this case regptr will return | |
279 | a pointer into a dummy register. */ | |
280 | #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) | |
281 | static const int mappings[] = { | |
282 | context_offset (Eax), | |
283 | context_offset (Ecx), | |
284 | context_offset (Edx), | |
285 | context_offset (Ebx), | |
286 | context_offset (Esp), | |
287 | context_offset (Ebp), | |
288 | context_offset (Esi), | |
289 | context_offset (Edi), | |
290 | context_offset (Eip), | |
291 | context_offset (EFlags), | |
292 | context_offset (SegCs), | |
293 | context_offset (SegSs), | |
294 | context_offset (SegDs), | |
295 | context_offset (SegEs), | |
296 | context_offset (SegFs), | |
297 | context_offset (SegGs), | |
298 | context_offset (FloatSave.RegisterArea[0 * 10]), | |
299 | context_offset (FloatSave.RegisterArea[1 * 10]), | |
300 | context_offset (FloatSave.RegisterArea[2 * 10]), | |
301 | context_offset (FloatSave.RegisterArea[3 * 10]), | |
302 | context_offset (FloatSave.RegisterArea[4 * 10]), | |
303 | context_offset (FloatSave.RegisterArea[5 * 10]), | |
304 | context_offset (FloatSave.RegisterArea[6 * 10]), | |
305 | context_offset (FloatSave.RegisterArea[7 * 10]), | |
306 | context_offset (FloatSave.ControlWord), | |
307 | context_offset (FloatSave.StatusWord), | |
308 | context_offset (FloatSave.TagWord), | |
309 | context_offset (FloatSave.ErrorSelector), | |
310 | context_offset (FloatSave.ErrorOffset), | |
311 | context_offset (FloatSave.DataSelector), | |
312 | context_offset (FloatSave.DataOffset), | |
313 | context_offset (FloatSave.ErrorSelector), | |
314 | /* XMM0-7 */ | |
315 | context_offset (ExtendedRegisters[10 * 16]), | |
316 | context_offset (ExtendedRegisters[11 * 16]), | |
317 | context_offset (ExtendedRegisters[12 * 16]), | |
318 | context_offset (ExtendedRegisters[13 * 16]), | |
319 | context_offset (ExtendedRegisters[14 * 16]), | |
320 | context_offset (ExtendedRegisters[15 * 16]), | |
321 | context_offset (ExtendedRegisters[16 * 16]), | |
322 | context_offset (ExtendedRegisters[17 * 16]), | |
323 | /* MXCSR */ | |
324 | context_offset (ExtendedRegisters[24]) | |
325 | }; | |
326 | #undef context_offset | |
327 | ||
1c07cc19 | 328 | #else /* __x86_64__ */ |
54709339 PM |
329 | |
330 | #define context_offset(x) (offsetof (CONTEXT, x)) | |
331 | static const int mappings[] = | |
332 | { | |
333 | context_offset (Rax), | |
334 | context_offset (Rbx), | |
335 | context_offset (Rcx), | |
336 | context_offset (Rdx), | |
337 | context_offset (Rsi), | |
338 | context_offset (Rdi), | |
339 | context_offset (Rbp), | |
340 | context_offset (Rsp), | |
341 | context_offset (R8), | |
342 | context_offset (R9), | |
343 | context_offset (R10), | |
344 | context_offset (R11), | |
345 | context_offset (R12), | |
346 | context_offset (R13), | |
347 | context_offset (R14), | |
348 | context_offset (R15), | |
349 | context_offset (Rip), | |
350 | context_offset (EFlags), | |
351 | context_offset (SegCs), | |
352 | context_offset (SegSs), | |
353 | context_offset (SegDs), | |
354 | context_offset (SegEs), | |
355 | context_offset (SegFs), | |
356 | context_offset (SegGs), | |
357 | context_offset (FloatSave.FloatRegisters[0]), | |
358 | context_offset (FloatSave.FloatRegisters[1]), | |
359 | context_offset (FloatSave.FloatRegisters[2]), | |
360 | context_offset (FloatSave.FloatRegisters[3]), | |
361 | context_offset (FloatSave.FloatRegisters[4]), | |
362 | context_offset (FloatSave.FloatRegisters[5]), | |
363 | context_offset (FloatSave.FloatRegisters[6]), | |
364 | context_offset (FloatSave.FloatRegisters[7]), | |
365 | context_offset (FloatSave.ControlWord), | |
366 | context_offset (FloatSave.StatusWord), | |
367 | context_offset (FloatSave.TagWord), | |
368 | context_offset (FloatSave.ErrorSelector), | |
369 | context_offset (FloatSave.ErrorOffset), | |
370 | context_offset (FloatSave.DataSelector), | |
371 | context_offset (FloatSave.DataOffset), | |
372 | context_offset (FloatSave.ErrorSelector) | |
373 | /* XMM0-7 */ , | |
374 | context_offset (Xmm0), | |
375 | context_offset (Xmm1), | |
376 | context_offset (Xmm2), | |
377 | context_offset (Xmm3), | |
378 | context_offset (Xmm4), | |
379 | context_offset (Xmm5), | |
380 | context_offset (Xmm6), | |
381 | context_offset (Xmm7), | |
382 | context_offset (Xmm8), | |
383 | context_offset (Xmm9), | |
384 | context_offset (Xmm10), | |
385 | context_offset (Xmm11), | |
386 | context_offset (Xmm12), | |
387 | context_offset (Xmm13), | |
388 | context_offset (Xmm14), | |
389 | context_offset (Xmm15), | |
390 | /* MXCSR */ | |
391 | context_offset (FloatSave.MxCsr) | |
392 | }; | |
393 | #undef context_offset | |
394 | ||
1c07cc19 | 395 | #endif /* __x86_64__ */ |
54709339 | 396 | |
34b34921 PA |
397 | /* Fetch register from gdbserver regcache data. */ |
398 | static void | |
442ea881 PA |
399 | i386_fetch_inferior_register (struct regcache *regcache, |
400 | win32_thread_info *th, int r) | |
34b34921 PA |
401 | { |
402 | char *context_offset = (char *) &th->context + mappings[r]; | |
403 | ||
404 | long l; | |
405 | if (r == FCS_REGNUM) | |
406 | { | |
407 | l = *((long *) context_offset) & 0xffff; | |
442ea881 | 408 | supply_register (regcache, r, (char *) &l); |
34b34921 PA |
409 | } |
410 | else if (r == FOP_REGNUM) | |
411 | { | |
412 | l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); | |
442ea881 | 413 | supply_register (regcache, r, (char *) &l); |
34b34921 PA |
414 | } |
415 | else | |
442ea881 | 416 | supply_register (regcache, r, context_offset); |
34b34921 PA |
417 | } |
418 | ||
419 | /* Store a new register value into the thread context of TH. */ | |
420 | static void | |
442ea881 PA |
421 | i386_store_inferior_register (struct regcache *regcache, |
422 | win32_thread_info *th, int r) | |
34b34921 PA |
423 | { |
424 | char *context_offset = (char *) &th->context + mappings[r]; | |
442ea881 | 425 | collect_register (regcache, r, context_offset); |
34b34921 PA |
426 | } |
427 | ||
912cf4ba PA |
428 | static const unsigned char i386_win32_breakpoint = 0xcc; |
429 | #define i386_win32_breakpoint_len 1 | |
430 | ||
54709339 | 431 | static void |
3aee8918 | 432 | i386_arch_setup (void) |
54709339 | 433 | { |
cc4d742f SM |
434 | struct target_desc *tdesc; |
435 | ||
1c07cc19 | 436 | #ifdef __x86_64__ |
cc4d742f | 437 | tdesc = amd64_create_target_description (X86_XSTATE_SSE_MASK, false, |
22916b07 | 438 | false); |
54709339 | 439 | #else |
cc4d742f | 440 | tdesc = i386_create_target_description (X86_XSTATE_SSE_MASK, false); |
54709339 | 441 | #endif |
cc4d742f SM |
442 | |
443 | init_target_desc (tdesc); | |
444 | ||
445 | win32_tdesc = tdesc; | |
54709339 PM |
446 | } |
447 | ||
68070c10 | 448 | struct win32_target_ops the_low_target = { |
3aee8918 | 449 | i386_arch_setup, |
68070c10 | 450 | sizeof (mappings) / sizeof (mappings[0]), |
34b34921 PA |
451 | i386_initial_stuff, |
452 | i386_get_thread_context, | |
a2abc7de | 453 | i386_prepare_to_resume, |
34b34921 PA |
454 | i386_thread_added, |
455 | i386_fetch_inferior_register, | |
456 | i386_store_inferior_register, | |
457 | i386_single_step, | |
912cf4ba PA |
458 | &i386_win32_breakpoint, |
459 | i386_win32_breakpoint_len, | |
802e8e6d | 460 | i386_supports_z_point_type, |
aa5ca48f DE |
461 | i386_insert_point, |
462 | i386_remove_point, | |
df7e5265 GB |
463 | x86_stopped_by_watchpoint, |
464 | x86_stopped_data_address | |
68070c10 | 465 | }; |