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riched20: Fix ME_SetSelection when cpMax > strlen().
[wine.git] / dlls / dbghelp / cpu_x86_64.c
blobe0ffb1148d80895546193baa8afc6a3018e60c19
1 /*
2 * File cpu_x86_64.c
3 *
4 * Copyright (C) 1999, 2005 Alexandre Julliard
5 * Copyright (C) 2009, 2011 Eric Pouech.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library 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 GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 */
21
22 #include <assert.h>
23
24 #define NONAMELESSUNION
25 #define NONAMELESSSTRUCT
26 #include "ntstatus.h"
27 #define WIN32_NO_STATUS
28 #include "dbghelp_private.h"
29 #include "winternl.h"
30 #include "wine/debug.h"
31
32 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
33
34 /* x86-64 unwind information, for PE modules, as described on MSDN */
35
36 typedef enum _UNWIND_OP_CODES
37 {
38 UWOP_PUSH_NONVOL = 0,
39 UWOP_ALLOC_LARGE,
40 UWOP_ALLOC_SMALL,
41 UWOP_SET_FPREG,
42 UWOP_SAVE_NONVOL,
43 UWOP_SAVE_NONVOL_FAR,
44 UWOP_SAVE_XMM128,
45 UWOP_SAVE_XMM128_FAR,
46 UWOP_PUSH_MACHFRAME
47 } UNWIND_CODE_OPS;
48
49 typedef union _UNWIND_CODE
50 {
51 struct
52 {
53 BYTE CodeOffset;
54 BYTE UnwindOp : 4;
55 BYTE OpInfo : 4;
56 };
57 USHORT FrameOffset;
58 } UNWIND_CODE, *PUNWIND_CODE;
59
60 typedef struct _UNWIND_INFO
61 {
62 BYTE Version : 3;
63 BYTE Flags : 5;
64 BYTE SizeOfProlog;
65 BYTE CountOfCodes;
66 BYTE FrameRegister : 4;
67 BYTE FrameOffset : 4;
68 UNWIND_CODE UnwindCode[1]; /* actually CountOfCodes (aligned) */
69 /*
70 * union
71 * {
72 * OPTIONAL ULONG ExceptionHandler;
73 * OPTIONAL ULONG FunctionEntry;
74 * };
75 * OPTIONAL ULONG ExceptionData[];
76 */
77 } UNWIND_INFO, *PUNWIND_INFO;
78
79 #define GetUnwindCodeEntry(info, index) \
80 ((info)->UnwindCode[index])
81
82 #define GetLanguageSpecificDataPtr(info) \
83 ((PVOID)&GetUnwindCodeEntry((info),((info)->CountOfCodes + 1) & ~1))
84
85 #define GetExceptionHandler(base, info) \
86 ((PEXCEPTION_HANDLER)((base) + *(PULONG)GetLanguageSpecificDataPtr(info)))
87
88 #define GetChainedFunctionEntry(base, info) \
89 ((PRUNTIME_FUNCTION)((base) + *(PULONG)GetLanguageSpecificDataPtr(info)))
90
91 #define GetExceptionDataPtr(info) \
92 ((PVOID)((PULONG)GetLanguageSpecificData(info) + 1)
93
94 static BOOL x86_64_get_addr(HANDLE hThread, const CONTEXT* ctx,
95 enum cpu_addr ca, ADDRESS64* addr)
96 {
97 addr->Mode = AddrModeFlat;
98 switch (ca)
99 {
100 #ifdef __x86_64__
101 case cpu_addr_pc: addr->Segment = ctx->SegCs; addr->Offset = ctx->Rip; return TRUE;
102 case cpu_addr_stack: addr->Segment = ctx->SegSs; addr->Offset = ctx->Rsp; return TRUE;
103 case cpu_addr_frame: addr->Segment = ctx->SegSs; addr->Offset = ctx->Rbp; return TRUE;
104 #endif
105 default: addr->Mode = -1;
106 return FALSE;
107 }
108 }
109
110 enum st_mode {stm_start, stm_64bit, stm_done};
111
112 /* indexes in Reserved array */
113 #define __CurrentMode 0
114 #define __CurrentCount 1
115 /* #define __ 2 (unused) */
116
117 #define curr_mode (frame->Reserved[__CurrentMode])
118 #define curr_count (frame->Reserved[__CurrentCount])
119 /* #define ??? (frame->Reserved[__]) (unused) */
120
121 #ifdef __x86_64__
122 union handler_data
123 {
124 RUNTIME_FUNCTION chain;
125 ULONG handler;
126 };
127
128 static void dump_unwind_info(struct cpu_stack_walk* csw, ULONG64 base, RUNTIME_FUNCTION *function)
129 {
130 static const char * const reg_names[16] =
131 { "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
132 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" };
133
134 union handler_data handler_data;
135 char buffer[sizeof(UNWIND_INFO) + 256 * sizeof(UNWIND_CODE)];
136 UNWIND_INFO* info = (UNWIND_INFO*)buffer;
137 unsigned int i, count;
138 RUNTIME_FUNCTION snext;
139 ULONG64 addr;
140
141 TRACE("**** func %x-%x\n", function->BeginAddress, function->EndAddress);
142 for (;;)
143 {
144 if (function->UnwindData & 1)
145 {
146 if (!sw_read_mem(csw, base + function->UnwindData, &snext, sizeof(snext)))
147 {
148 TRACE("Couldn't unwind RUNTIME_INFO at %lx\n", base + function->UnwindData);
149 return;
150 }
151 TRACE("unwind info for function %p-%p chained to function %p-%p\n",
152 (char*)base + function->BeginAddress, (char*)base + function->EndAddress,
153 (char*)base + snext.BeginAddress, (char*)base + snext.EndAddress);
154 function = &snext;
155 continue;
156 }
157 addr = base + function->UnwindData;
158 if (!sw_read_mem(csw, addr, info, FIELD_OFFSET(UNWIND_INFO, UnwindCode)) ||
159 !sw_read_mem(csw, addr + FIELD_OFFSET(UNWIND_INFO, UnwindCode),
160 info->UnwindCode, info->CountOfCodes * sizeof(UNWIND_CODE)))
161 {
162 FIXME("couldn't read memory for UNWIND_INFO at %lx\n", addr);
163 return;
164 }
165 TRACE("unwind info at %p flags %x prolog 0x%x bytes function %p-%p\n",
166 (char*)addr, info->Flags, info->SizeOfProlog,
167 (char*)base + function->BeginAddress, (char*)base + function->EndAddress);
168
169 if (info->FrameRegister)
170 TRACE(" frame register %s offset 0x%x(%%rsp)\n",
171 reg_names[info->FrameRegister], info->FrameOffset * 16);
172
173 for (i = 0; i < info->CountOfCodes; i++)
174 {
175 TRACE(" 0x%x: ", info->UnwindCode[i].CodeOffset);
176 switch (info->UnwindCode[i].UnwindOp)
177 {
178 case UWOP_PUSH_NONVOL:
179 TRACE("pushq %%%s\n", reg_names[info->UnwindCode[i].OpInfo]);
180 break;
181 case UWOP_ALLOC_LARGE:
182 if (info->UnwindCode[i].OpInfo)
183 {
184 count = *(DWORD*)&info->UnwindCode[i+1];
185 i += 2;
186 }
187 else
188 {
189 count = *(USHORT*)&info->UnwindCode[i+1] * 8;
190 i++;
191 }
192 TRACE("subq $0x%x,%%rsp\n", count);
193 break;
194 case UWOP_ALLOC_SMALL:
195 count = (info->UnwindCode[i].OpInfo + 1) * 8;
196 TRACE("subq $0x%x,%%rsp\n", count);
197 break;
198 case UWOP_SET_FPREG:
199 TRACE("leaq 0x%x(%%rsp),%s\n",
200 info->FrameOffset * 16, reg_names[info->FrameRegister]);
201 break;
202 case UWOP_SAVE_NONVOL:
203 count = *(USHORT*)&info->UnwindCode[i+1] * 8;
204 TRACE("movq %%%s,0x%x(%%rsp)\n", reg_names[info->UnwindCode[i].OpInfo], count);
205 i++;
206 break;
207 case UWOP_SAVE_NONVOL_FAR:
208 count = *(DWORD*)&info->UnwindCode[i+1];
209 TRACE("movq %%%s,0x%x(%%rsp)\n", reg_names[info->UnwindCode[i].OpInfo], count);
210 i += 2;
211 break;
212 case UWOP_SAVE_XMM128:
213 count = *(USHORT*)&info->UnwindCode[i+1] * 16;
214 TRACE("movaps %%xmm%u,0x%x(%%rsp)\n", info->UnwindCode[i].OpInfo, count);
215 i++;
216 break;
217 case UWOP_SAVE_XMM128_FAR:
218 count = *(DWORD*)&info->UnwindCode[i+1];
219 TRACE("movaps %%xmm%u,0x%x(%%rsp)\n", info->UnwindCode[i].OpInfo, count);
220 i += 2;
221 break;
222 case UWOP_PUSH_MACHFRAME:
223 TRACE("PUSH_MACHFRAME %u\n", info->UnwindCode[i].OpInfo);
224 break;
225 default:
226 FIXME("unknown code %u\n", info->UnwindCode[i].UnwindOp);
227 break;
228 }
229 }
230
231 addr += FIELD_OFFSET(UNWIND_INFO, UnwindCode) +
232 ((info->CountOfCodes + 1) & ~1) * sizeof(UNWIND_CODE);
233 if (info->Flags & UNW_FLAG_CHAININFO)
234 {
235 if (!sw_read_mem(csw, addr, &handler_data, sizeof(handler_data.chain)))
236 {
237 FIXME("couldn't read memory for handler_data.chain\n");
238 return;
239 }
240 TRACE(" chained to function %p-%p\n",
241 (char*)base + handler_data.chain.BeginAddress,
242 (char*)base + handler_data.chain.EndAddress);
243 function = &handler_data.chain;
244 continue;
245 }
246 if (info->Flags & (UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER))
247 {
248 if (!sw_read_mem(csw, addr, &handler_data, sizeof(handler_data.handler)))
249 {
250 FIXME("couldn't read memory for handler_data.handler\n");
251 return;
252 }
253 TRACE(" handler %p data at %p\n",
254 (char*)base + handler_data.handler, (char*)addr + sizeof(handler_data.handler));
255 }
256 break;
257 }
258 }
259
260 /* highly derived from dlls/ntdll/signal_x86_64.c */
261 static ULONG64 get_int_reg(CONTEXT *context, int reg)
262 {
263 return *(&context->Rax + reg);
264 }
265
266 static void set_int_reg(CONTEXT *context, int reg, ULONG64 val)
267 {
268 *(&context->Rax + reg) = val;
269 }
270
271 static void set_float_reg(CONTEXT *context, int reg, M128A val)
272 {
273 *(&context->u.s.Xmm0 + reg) = val;
274 }
275
276 static int get_opcode_size(UNWIND_CODE op)
277 {
278 switch (op.UnwindOp)
279 {
280 case UWOP_ALLOC_LARGE:
281 return 2 + (op.OpInfo != 0);
282 case UWOP_SAVE_NONVOL:
283 case UWOP_SAVE_XMM128:
284 return 2;
285 case UWOP_SAVE_NONVOL_FAR:
286 case UWOP_SAVE_XMM128_FAR:
287 return 3;
288 default:
289 return 1;
290 }
291 }
292
293 static BOOL is_inside_epilog(struct cpu_stack_walk* csw, DWORD64 pc,
294 DWORD64 base, const RUNTIME_FUNCTION *function )
295 {
296 BYTE op0, op1, op2;
297 LONG val32;
298
299 if (!sw_read_mem(csw, pc, &op0, 1)) return FALSE;
300
301 /* add or lea must be the first instruction, and it must have a rex.W prefix */
302 if ((op0 & 0xf8) == 0x48)
303 {
304 if (!sw_read_mem(csw, pc + 1, &op1, 1)) return FALSE;
305 switch (op1)
306 {
307 case 0x81: /* add $nnnn,%rsp */
308 if (!sw_read_mem(csw, pc + 2, &op2, 1)) return FALSE;
309 if (op0 == 0x48 && op2 == 0xc4)
310 {
311 pc += 7;
312 break;
313 }
314 return FALSE;
315 case 0x83: /* add $n,%rsp */
316 if (!sw_read_mem(csw, pc + 2, &op2, 1)) return FALSE;
317 if (op0 == 0x48 && op2 == 0xc4)
318 {
319 pc += 4;
320 break;
321 }
322 return FALSE;
323 case 0x8d: /* lea n(reg),%rsp */
324 if (!sw_read_mem(csw, pc + 2, &op2, 1)) return FALSE;
325 if (op0 & 0x06) return FALSE; /* rex.RX must be cleared */
326 if (((op2 >> 3) & 7) != 4) return FALSE; /* dest reg mus be %rsp */
327 if ((op2 & 7) == 4) return FALSE; /* no SIB byte allowed */
328 if ((op2 >> 6) == 1) /* 8-bit offset */
329 {
330 pc += 4;
331 break;
332 }
333 if ((op2 >> 6) == 2) /* 32-bit offset */
334 {
335 pc += 7;
336 break;
337 }
338 return FALSE;
339 }
340 }
341
342 /* now check for various pop instructions */
343 for (;;)
344 {
345 if (!sw_read_mem(csw, pc, &op0, 1)) return FALSE;
346 if ((op0 & 0xf0) == 0x40) /* rex prefix */
347 {
348 if (!sw_read_mem(csw, ++pc, &op0, 1)) return FALSE;
349 }
350
351 switch (op0)
352 {
353 case 0x58: /* pop %rax/%r8 */
354 case 0x59: /* pop %rcx/%r9 */
355 case 0x5a: /* pop %rdx/%r10 */
356 case 0x5b: /* pop %rbx/%r11 */
357 case 0x5c: /* pop %rsp/%r12 */
358 case 0x5d: /* pop %rbp/%r13 */
359 case 0x5e: /* pop %rsi/%r14 */
360 case 0x5f: /* pop %rdi/%r15 */
361 pc++;
362 continue;
363 case 0xc2: /* ret $nn */
364 case 0xc3: /* ret */
365 return TRUE;
366 case 0xe9: /* jmp nnnn */
367 if (!sw_read_mem(csw, pc + 1, &val32, sizeof(LONG))) return FALSE;
368 pc += 5 + val32;
369 if (pc - base >= function->BeginAddress && pc - base < function->EndAddress)
370 continue;
371 break;
372 case 0xeb: /* jmp n */
373 if (!sw_read_mem(csw, pc + 1, &op1, 1)) return FALSE;
374 pc += 2 + (signed char)op1;
375 if (pc - base >= function->BeginAddress && pc - base < function->EndAddress)
376 continue;
377 break;
378 case 0xf3: /* rep; ret (for amd64 prediction bug) */
379 if (!sw_read_mem(csw, pc + 1, &op1, 1)) return FALSE;
380 return op1 == 0xc3;
381 }
382 return FALSE;
383 }
384 }
385
386 static BOOL interpret_epilog(struct cpu_stack_walk* csw, ULONG64 pc, CONTEXT *context )
387 {
388 BYTE insn, val8;
389 WORD val16;
390 LONG val32;
391 DWORD64 val64;
392
393 for (;;)
394 {
395 BYTE rex = 0;
396
397 if (!sw_read_mem(csw, pc, &insn, 1)) return FALSE;
398 if ((insn & 0xf0) == 0x40)
399 {
400 rex = insn & 0x0f; /* rex prefix */
401 if (!sw_read_mem(csw, ++pc, &insn, 1)) return FALSE;
402 }
403
404 switch (insn)
405 {
406 case 0x58: /* pop %rax/r8 */
407 case 0x59: /* pop %rcx/r9 */
408 case 0x5a: /* pop %rdx/r10 */
409 case 0x5b: /* pop %rbx/r11 */
410 case 0x5c: /* pop %rsp/r12 */
411 case 0x5d: /* pop %rbp/r13 */
412 case 0x5e: /* pop %rsi/r14 */
413 case 0x5f: /* pop %rdi/r15 */
414 if (!sw_read_mem(csw, context->Rsp, &val64, sizeof(DWORD64))) return FALSE;
415 set_int_reg(context, insn - 0x58 + (rex & 1) * 8, val64);
416 context->Rsp += sizeof(ULONG64);
417 pc++;
418 continue;
419 case 0x81: /* add $nnnn,%rsp */
420 if (!sw_read_mem(csw, pc + 2, &val32, sizeof(LONG))) return FALSE;
421 context->Rsp += val32;
422 pc += 2 + sizeof(LONG);
423 continue;
424 case 0x83: /* add $n,%rsp */
425 if (!sw_read_mem(csw, pc + 2, &val8, sizeof(BYTE))) return FALSE;
426 context->Rsp += (signed char)val8;
427 pc += 3;
428 continue;
429 case 0x8d:
430 if (!sw_read_mem(csw, pc + 1, &insn, sizeof(BYTE))) return FALSE;
431 if ((insn >> 6) == 1) /* lea n(reg),%rsp */
432 {
433 if (!sw_read_mem(csw, pc + 2, &val8, sizeof(BYTE))) return FALSE;
434 context->Rsp = get_int_reg( context, (insn & 7) + (rex & 1) * 8 ) + (signed char)val8;
435 pc += 3;
436 }
437 else /* lea nnnn(reg),%rsp */
438 {
439 if (!sw_read_mem(csw, pc + 2, &val32, sizeof(LONG))) return FALSE;
440 context->Rsp = get_int_reg( context, (insn & 7) + (rex & 1) * 8 ) + val32;
441 pc += 2 + sizeof(LONG);
442 }
443 continue;
444 case 0xc2: /* ret $nn */
445 if (!sw_read_mem(csw, context->Rsp, &val64, sizeof(DWORD64))) return FALSE;
446 if (!sw_read_mem(csw, pc + 1, &val16, sizeof(WORD))) return FALSE;
447 context->Rip = val64;
448 context->Rsp += sizeof(ULONG64) + val16;
449 return TRUE;
450 case 0xc3: /* ret */
451 case 0xf3: /* rep; ret */
452 if (!sw_read_mem(csw, context->Rsp, &val64, sizeof(DWORD64))) return FALSE;
453 context->Rip = val64;
454 context->Rsp += sizeof(ULONG64);
455 return TRUE;
456 case 0xe9: /* jmp nnnn */
457 if (!sw_read_mem(csw, pc + 1, &val32, sizeof(LONG))) return FALSE;
458 pc += 5 + val32;
459 continue;
460 case 0xeb: /* jmp n */
461 if (!sw_read_mem(csw, pc + 1, &val8, sizeof(BYTE))) return FALSE;
462 pc += 2 + (signed char)val8;
463 continue;
464 }
465 FIXME("unsupported insn %x\n", insn);
466 return FALSE;
467 }
468 }
469
470 static BOOL default_unwind(struct cpu_stack_walk* csw, CONTEXT* context)
471 {
472 if (!sw_read_mem(csw, context->Rsp, &context->Rip, sizeof(DWORD64)))
473 {
474 WARN("Cannot read new frame offset %s\n", wine_dbgstr_longlong(context->Rsp));
475 return FALSE;
476 }
477 context->Rsp += sizeof(DWORD64);
478 return TRUE;
479 }
480
481 static BOOL interpret_function_table_entry(struct cpu_stack_walk* csw,
482 CONTEXT* context, RUNTIME_FUNCTION* function, DWORD64 base)
483 {
484 char buffer[sizeof(UNWIND_INFO) + 256 * sizeof(UNWIND_CODE)];
485 UNWIND_INFO* info = (UNWIND_INFO*)buffer;
486 unsigned i;
487 DWORD64 newframe, prolog_offset, off, value;
488 M128A floatvalue;
489 union handler_data handler_data;
490
491 /* FIXME: we have some assumptions here */
492 assert(context);
493 dump_unwind_info(csw, sw_module_base(csw, context->Rip), function);
494 newframe = context->Rsp;
495 for (;;)
496 {
497 if (!sw_read_mem(csw, base + function->UnwindData, info, sizeof(*info)) ||
498 !sw_read_mem(csw, base + function->UnwindData + FIELD_OFFSET(UNWIND_INFO, UnwindCode),
499 info->UnwindCode, info->CountOfCodes * sizeof(UNWIND_CODE)))
500 {
501 WARN("Couldn't read unwind_code at %lx\n", base + function->UnwindData);
502 return FALSE;
503 }
504
505 if (info->Version != 1)
506 {
507 WARN("unknown unwind info version %u at %lx\n", info->Version, base + function->UnwindData);
508 return FALSE;
509 }
510
511 if (info->FrameRegister)
512 newframe = get_int_reg(context, info->FrameRegister) - info->FrameOffset * 16;
513
514 /* check if in prolog */
515 if (context->Rip >= base + function->BeginAddress &&
516 context->Rip < base + function->BeginAddress + info->SizeOfProlog)
517 {
518 prolog_offset = context->Rip - base - function->BeginAddress;
519 }
520 else
521 {
522 prolog_offset = ~0;
523 if (is_inside_epilog(csw, context->Rip, base, function))
524 {
525 interpret_epilog(csw, context->Rip, context);
526 return TRUE;
527 }
528 }
529
530 for (i = 0; i < info->CountOfCodes; i += get_opcode_size(info->UnwindCode[i]))
531 {
532 if (prolog_offset < info->UnwindCode[i].CodeOffset) continue; /* skip it */
533
534 switch (info->UnwindCode[i].UnwindOp)
535 {
536 case UWOP_PUSH_NONVOL: /* pushq %reg */
537 if (!sw_read_mem(csw, context->Rsp, &value, sizeof(DWORD64))) return FALSE;
538 set_int_reg(context, info->UnwindCode[i].OpInfo, value);
539 context->Rsp += sizeof(ULONG64);
540 break;
541 case UWOP_ALLOC_LARGE: /* subq $nn,%rsp */
542 if (info->UnwindCode[i].OpInfo) context->Rsp += *(DWORD*)&info->UnwindCode[i+1];
543 else context->Rsp += *(USHORT*)&info->UnwindCode[i+1] * 8;
544 break;
545 case UWOP_ALLOC_SMALL: /* subq $n,%rsp */
546 context->Rsp += (info->UnwindCode[i].OpInfo + 1) * 8;
547 break;
548 case UWOP_SET_FPREG: /* leaq nn(%rsp),%framereg */
549 context->Rsp = newframe;
550 break;
551 case UWOP_SAVE_NONVOL: /* movq %reg,n(%rsp) */
552 off = newframe + *(USHORT*)&info->UnwindCode[i+1] * 8;
553 if (!sw_read_mem(csw, off, &value, sizeof(DWORD64))) return FALSE;
554 set_int_reg(context, info->UnwindCode[i].OpInfo, value);
555 break;
556 case UWOP_SAVE_NONVOL_FAR: /* movq %reg,nn(%rsp) */
557 off = newframe + *(DWORD*)&info->UnwindCode[i+1];
558 if (!sw_read_mem(csw, off, &value, sizeof(DWORD64))) return FALSE;
559 set_int_reg(context, info->UnwindCode[i].OpInfo, value);
560 break;
561 case UWOP_SAVE_XMM128: /* movaps %xmmreg,n(%rsp) */
562 off = newframe + *(USHORT*)&info->UnwindCode[i+1] * 16;
563 if (!sw_read_mem(csw, off, &floatvalue, sizeof(M128A))) return FALSE;
564 set_float_reg(context, info->UnwindCode[i].OpInfo, floatvalue);
565 break;
566 case UWOP_SAVE_XMM128_FAR: /* movaps %xmmreg,nn(%rsp) */
567 off = newframe + *(DWORD*)&info->UnwindCode[i+1];
568 if (!sw_read_mem(csw, off, &floatvalue, sizeof(M128A))) return FALSE;
569 set_float_reg(context, info->UnwindCode[i].OpInfo, floatvalue);
570 break;
571 case UWOP_PUSH_MACHFRAME:
572 FIXME("PUSH_MACHFRAME %u\n", info->UnwindCode[i].OpInfo);
573 break;
574 default:
575 FIXME("unknown code %u\n", info->UnwindCode[i].UnwindOp);
576 break;
577 }
578 }
579 if (!(info->Flags & UNW_FLAG_CHAININFO)) break;
580 if (!sw_read_mem(csw, base + function->UnwindData + FIELD_OFFSET(UNWIND_INFO, UnwindCode) +
581 ((info->CountOfCodes + 1) & ~1) * sizeof(UNWIND_CODE),
582 &handler_data, sizeof(handler_data))) return FALSE;
583 function = &handler_data.chain; /* restart with the chained info */
584 }
585 return default_unwind(csw, context);
586 }
587
588 /* fetch_next_frame()
589 *
590 * modify (at least) context.{rip, rsp, rbp} using unwind information
591 * either out of PE exception handlers, debug info (dwarf), or simple stack unwind
592 */
593 static BOOL fetch_next_frame(struct cpu_stack_walk* csw, CONTEXT* context,
594 DWORD_PTR curr_pc, void** prtf)
595 {
596 DWORD_PTR cfa;
597 RUNTIME_FUNCTION* rtf;
598 DWORD64 base;
599
600 if (!curr_pc || !(base = sw_module_base(csw, curr_pc))) return FALSE;
601 rtf = sw_table_access(csw, curr_pc);
602 if (prtf) *prtf = rtf;
603 if (rtf)
604 {
605 return interpret_function_table_entry(csw, context, rtf, base);
606 }
607 else if (dwarf2_virtual_unwind(csw, curr_pc, context, &cfa))
608 {
609 context->Rsp = cfa;
610 TRACE("next function rip=%016lx\n", context->Rip);
611 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
612 context->Rax, context->Rbx, context->Rcx, context->Rdx);
613 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
614 context->Rsi, context->Rdi, context->Rbp, context->Rsp);
615 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
616 context->R8, context->R9, context->R10, context->R11);
617 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
618 context->R12, context->R13, context->R14, context->R15);
619 return TRUE;
620 }
621 else
622 return default_unwind(csw, context);
623 }
624
625 static BOOL x86_64_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, CONTEXT* context)
626 {
627 unsigned deltapc = curr_count <= 1 ? 0 : 1;
628
629 /* sanity check */
630 if (curr_mode >= stm_done) return FALSE;
631 assert(!csw->is32);
632
633 TRACE("Enter: PC=%s Frame=%s Return=%s Stack=%s Mode=%s Count=%s\n",
634 wine_dbgstr_addr(&frame->AddrPC),
635 wine_dbgstr_addr(&frame->AddrFrame),
636 wine_dbgstr_addr(&frame->AddrReturn),
637 wine_dbgstr_addr(&frame->AddrStack),
638 curr_mode == stm_start ? "start" : "64bit",
639 wine_dbgstr_longlong(curr_count));
640
641 if (curr_mode == stm_start)
642 {
643 if ((frame->AddrPC.Mode == AddrModeFlat) &&
644 (frame->AddrFrame.Mode != AddrModeFlat))
645 {
646 WARN("Bad AddrPC.Mode / AddrFrame.Mode combination\n");
647 goto done_err;
648 }
649
650 /* Init done */
651 curr_mode = stm_64bit;
652 frame->AddrReturn.Mode = frame->AddrStack.Mode = AddrModeFlat;
653 /* don't set up AddrStack on first call. Either the caller has set it up, or
654 * we will get it in the next frame
655 */
656 memset(&frame->AddrBStore, 0, sizeof(frame->AddrBStore));
657 }
658 else
659 {
660 if (context->Rsp != frame->AddrStack.Offset) FIXME("inconsistent Stack Pointer\n");
661 if (context->Rip != frame->AddrPC.Offset) FIXME("inconsistent Instruction Pointer\n");
662
663 if (frame->AddrReturn.Offset == 0) goto done_err;
664 if (!fetch_next_frame(csw, context, frame->AddrPC.Offset - deltapc, &frame->FuncTableEntry))
665 goto done_err;
666 deltapc = 1;
667 }
668
669 memset(&frame->Params, 0, sizeof(frame->Params));
670
671 /* set frame information */
672 frame->AddrStack.Offset = context->Rsp;
673 frame->AddrFrame.Offset = context->Rbp;
674 frame->AddrPC.Offset = context->Rip;
675 if (1)
676 {
677 CONTEXT newctx = *context;
678
679 if (!fetch_next_frame(csw, &newctx, frame->AddrPC.Offset - deltapc, NULL))
680 goto done_err;
681 frame->AddrReturn.Mode = AddrModeFlat;
682 frame->AddrReturn.Offset = newctx.Rip;
683 }
684
685 frame->Far = TRUE;
686 frame->Virtual = TRUE;
687 curr_count++;
688
689 TRACE("Leave: PC=%s Frame=%s Return=%s Stack=%s Mode=%s Count=%s FuncTable=%p\n",
690 wine_dbgstr_addr(&frame->AddrPC),
691 wine_dbgstr_addr(&frame->AddrFrame),
692 wine_dbgstr_addr(&frame->AddrReturn),
693 wine_dbgstr_addr(&frame->AddrStack),
694 curr_mode == stm_start ? "start" : "64bit",
695 wine_dbgstr_longlong(curr_count),
696 frame->FuncTableEntry);
697
698 return TRUE;
699 done_err:
700 curr_mode = stm_done;
701 return FALSE;
702 }
703 #else
704 static BOOL x86_64_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, CONTEXT* context)
705 {
706 return FALSE;
707 }
708 #endif
709
710 static void* x86_64_find_runtime_function(struct module* module, DWORD64 addr)
711 {
712 #ifdef __x86_64__
713 RUNTIME_FUNCTION* rtf;
714 ULONG size;
715 int min, max;
716
717 rtf = (RUNTIME_FUNCTION*)pe_map_directory(module, IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size);
718 if (rtf) for (min = 0, max = size / sizeof(*rtf); min <= max; )
719 {
720 int pos = (min + max) / 2;
721 if (addr < module->module.BaseOfImage + rtf[pos].BeginAddress) max = pos - 1;
722 else if (addr >= module->module.BaseOfImage + rtf[pos].EndAddress) min = pos + 1;
723 else
724 {
725 rtf += pos;
726 while (rtf->UnwindData & 1) /* follow chained entry */
727 {
728 FIXME("RunTime_Function outside IMAGE_DIRECTORY_ENTRY_EXCEPTION unimplemented yet!\n");
729 /* we need to read into the other process */
730 /* rtf = (RUNTIME_FUNCTION*)(module->module.BaseOfImage + (rtf->UnwindData & ~1)); */
731 }
732 return rtf;
733 }
734 }
735 #endif
736 return NULL;
737 }
738
739 static unsigned x86_64_map_dwarf_register(unsigned regno)
740 {
741 unsigned reg;
742
743 if (regno >= 17 && regno <= 24)
744 reg = CV_AMD64_XMM0 + regno - 17;
745 else if (regno >= 25 && regno <= 32)
746 reg = CV_AMD64_XMM8 + regno - 25;
747 else if (regno >= 33 && regno <= 40)
748 reg = CV_AMD64_ST0 + regno - 33;
749 else switch (regno)
750 {
751 case 0: reg = CV_AMD64_RAX; break;
752 case 1: reg = CV_AMD64_RDX; break;
753 case 2: reg = CV_AMD64_RCX; break;
754 case 3: reg = CV_AMD64_RBX; break;
755 case 4: reg = CV_AMD64_RSI; break;
756 case 5: reg = CV_AMD64_RDI; break;
757 case 6: reg = CV_AMD64_RBP; break;
758 case 7: reg = CV_AMD64_RSP; break;
759 case 8: reg = CV_AMD64_R8; break;
760 case 9: reg = CV_AMD64_R9; break;
761 case 10: reg = CV_AMD64_R10; break;
762 case 11: reg = CV_AMD64_R11; break;
763 case 12: reg = CV_AMD64_R12; break;
764 case 13: reg = CV_AMD64_R13; break;
765 case 14: reg = CV_AMD64_R14; break;
766 case 15: reg = CV_AMD64_R15; break;
767 case 16: reg = CV_AMD64_RIP; break;
768 case 49: reg = CV_AMD64_EFLAGS; break;
769 case 50: reg = CV_AMD64_ES; break;
770 case 51: reg = CV_AMD64_CS; break;
771 case 52: reg = CV_AMD64_SS; break;
772 case 53: reg = CV_AMD64_DS; break;
773 case 54: reg = CV_AMD64_FS; break;
774 case 55: reg = CV_AMD64_GS; break;
775 case 62: reg = CV_AMD64_TR; break;
776 case 63: reg = CV_AMD64_LDTR; break;
777 case 64: reg = CV_AMD64_MXCSR; break;
778 case 65: reg = CV_AMD64_CTRL; break;
779 case 66: reg = CV_AMD64_STAT; break;
780 /*
781 * 56-57 reserved
782 * 58 %fs.base
783 * 59 %gs.base
784 * 60-61 reserved
785 */
786 default:
787 FIXME("Don't know how to map register %d\n", regno);
788 return 0;
789 }
790 return reg;
791 }
792
793 static void* x86_64_fetch_context_reg(CONTEXT* ctx, unsigned regno, unsigned* size)
794 {
795 #ifdef __x86_64__
796 switch (regno)
797 {
798 case CV_AMD64_RAX: *size = sizeof(ctx->Rax); return &ctx->Rax;
799 case CV_AMD64_RDX: *size = sizeof(ctx->Rdx); return &ctx->Rdx;
800 case CV_AMD64_RCX: *size = sizeof(ctx->Rcx); return &ctx->Rcx;
801 case CV_AMD64_RBX: *size = sizeof(ctx->Rbx); return &ctx->Rbx;
802 case CV_AMD64_RSI: *size = sizeof(ctx->Rsi); return &ctx->Rsi;
803 case CV_AMD64_RDI: *size = sizeof(ctx->Rdi); return &ctx->Rdi;
804 case CV_AMD64_RBP: *size = sizeof(ctx->Rbp); return &ctx->Rbp;
805 case CV_AMD64_RSP: *size = sizeof(ctx->Rsp); return &ctx->Rsp;
806 case CV_AMD64_R8: *size = sizeof(ctx->R8); return &ctx->R8;
807 case CV_AMD64_R9: *size = sizeof(ctx->R9); return &ctx->R9;
808 case CV_AMD64_R10: *size = sizeof(ctx->R10); return &ctx->R10;
809 case CV_AMD64_R11: *size = sizeof(ctx->R11); return &ctx->R11;
810 case CV_AMD64_R12: *size = sizeof(ctx->R12); return &ctx->R12;
811 case CV_AMD64_R13: *size = sizeof(ctx->R13); return &ctx->R13;
812 case CV_AMD64_R14: *size = sizeof(ctx->R14); return &ctx->R14;
813 case CV_AMD64_R15: *size = sizeof(ctx->R15); return &ctx->R15;
814 case CV_AMD64_RIP: *size = sizeof(ctx->Rip); return &ctx->Rip;
815
816 case CV_AMD64_XMM0 + 0: *size = sizeof(ctx->u.s.Xmm0 ); return &ctx->u.s.Xmm0;
817 case CV_AMD64_XMM0 + 1: *size = sizeof(ctx->u.s.Xmm1 ); return &ctx->u.s.Xmm1;
818 case CV_AMD64_XMM0 + 2: *size = sizeof(ctx->u.s.Xmm2 ); return &ctx->u.s.Xmm2;
819 case CV_AMD64_XMM0 + 3: *size = sizeof(ctx->u.s.Xmm3 ); return &ctx->u.s.Xmm3;
820 case CV_AMD64_XMM0 + 4: *size = sizeof(ctx->u.s.Xmm4 ); return &ctx->u.s.Xmm4;
821 case CV_AMD64_XMM0 + 5: *size = sizeof(ctx->u.s.Xmm5 ); return &ctx->u.s.Xmm5;
822 case CV_AMD64_XMM0 + 6: *size = sizeof(ctx->u.s.Xmm6 ); return &ctx->u.s.Xmm6;
823 case CV_AMD64_XMM0 + 7: *size = sizeof(ctx->u.s.Xmm7 ); return &ctx->u.s.Xmm7;
824 case CV_AMD64_XMM8 + 0: *size = sizeof(ctx->u.s.Xmm8 ); return &ctx->u.s.Xmm8;
825 case CV_AMD64_XMM8 + 1: *size = sizeof(ctx->u.s.Xmm9 ); return &ctx->u.s.Xmm9;
826 case CV_AMD64_XMM8 + 2: *size = sizeof(ctx->u.s.Xmm10); return &ctx->u.s.Xmm10;
827 case CV_AMD64_XMM8 + 3: *size = sizeof(ctx->u.s.Xmm11); return &ctx->u.s.Xmm11;
828 case CV_AMD64_XMM8 + 4: *size = sizeof(ctx->u.s.Xmm12); return &ctx->u.s.Xmm12;
829 case CV_AMD64_XMM8 + 5: *size = sizeof(ctx->u.s.Xmm13); return &ctx->u.s.Xmm13;
830 case CV_AMD64_XMM8 + 6: *size = sizeof(ctx->u.s.Xmm14); return &ctx->u.s.Xmm14;
831 case CV_AMD64_XMM8 + 7: *size = sizeof(ctx->u.s.Xmm15); return &ctx->u.s.Xmm15;
832
833 case CV_AMD64_ST0 + 0: *size = sizeof(ctx->u.s.Legacy[0]); return &ctx->u.s.Legacy[0];
834 case CV_AMD64_ST0 + 1: *size = sizeof(ctx->u.s.Legacy[1]); return &ctx->u.s.Legacy[1];
835 case CV_AMD64_ST0 + 2: *size = sizeof(ctx->u.s.Legacy[2]); return &ctx->u.s.Legacy[2];
836 case CV_AMD64_ST0 + 3: *size = sizeof(ctx->u.s.Legacy[3]); return &ctx->u.s.Legacy[3];
837 case CV_AMD64_ST0 + 4: *size = sizeof(ctx->u.s.Legacy[4]); return &ctx->u.s.Legacy[4];
838 case CV_AMD64_ST0 + 5: *size = sizeof(ctx->u.s.Legacy[5]); return &ctx->u.s.Legacy[5];
839 case CV_AMD64_ST0 + 6: *size = sizeof(ctx->u.s.Legacy[6]); return &ctx->u.s.Legacy[6];
840 case CV_AMD64_ST0 + 7: *size = sizeof(ctx->u.s.Legacy[7]); return &ctx->u.s.Legacy[7];
841
842 case CV_AMD64_EFLAGS: *size = sizeof(ctx->EFlags); return &ctx->EFlags;
843 case CV_AMD64_ES: *size = sizeof(ctx->SegEs); return &ctx->SegEs;
844 case CV_AMD64_CS: *size = sizeof(ctx->SegCs); return &ctx->SegCs;
845 case CV_AMD64_SS: *size = sizeof(ctx->SegSs); return &ctx->SegSs;
846 case CV_AMD64_DS: *size = sizeof(ctx->SegDs); return &ctx->SegDs;
847 case CV_AMD64_FS: *size = sizeof(ctx->SegFs); return &ctx->SegFs;
848 case CV_AMD64_GS: *size = sizeof(ctx->SegGs); return &ctx->SegGs;
849
850 }
851 #endif
852 FIXME("Unknown register %x\n", regno);
853 return NULL;
854 }
855
856 static const char* x86_64_fetch_regname(unsigned regno)
857 {
858 switch (regno)
859 {
860 case CV_AMD64_RAX: return "rax";
861 case CV_AMD64_RDX: return "rdx";
862 case CV_AMD64_RCX: return "rcx";
863 case CV_AMD64_RBX: return "rbx";
864 case CV_AMD64_RSI: return "rsi";
865 case CV_AMD64_RDI: return "rdi";
866 case CV_AMD64_RBP: return "rbp";
867 case CV_AMD64_RSP: return "rsp";
868 case CV_AMD64_R8: return "r8";
869 case CV_AMD64_R9: return "r9";
870 case CV_AMD64_R10: return "r10";
871 case CV_AMD64_R11: return "r11";
872 case CV_AMD64_R12: return "r12";
873 case CV_AMD64_R13: return "r13";
874 case CV_AMD64_R14: return "r14";
875 case CV_AMD64_R15: return "r15";
876 case CV_AMD64_RIP: return "rip";
877
878 case CV_AMD64_XMM0 + 0: return "xmm0";
879 case CV_AMD64_XMM0 + 1: return "xmm1";
880 case CV_AMD64_XMM0 + 2: return "xmm2";
881 case CV_AMD64_XMM0 + 3: return "xmm3";
882 case CV_AMD64_XMM0 + 4: return "xmm4";
883 case CV_AMD64_XMM0 + 5: return "xmm5";
884 case CV_AMD64_XMM0 + 6: return "xmm6";
885 case CV_AMD64_XMM0 + 7: return "xmm7";
886 case CV_AMD64_XMM8 + 0: return "xmm8";
887 case CV_AMD64_XMM8 + 1: return "xmm9";
888 case CV_AMD64_XMM8 + 2: return "xmm10";
889 case CV_AMD64_XMM8 + 3: return "xmm11";
890 case CV_AMD64_XMM8 + 4: return "xmm12";
891 case CV_AMD64_XMM8 + 5: return "xmm13";
892 case CV_AMD64_XMM8 + 6: return "xmm14";
893 case CV_AMD64_XMM8 + 7: return "xmm15";
894
895 case CV_AMD64_ST0 + 0: return "st0";
896 case CV_AMD64_ST0 + 1: return "st1";
897 case CV_AMD64_ST0 + 2: return "st2";
898 case CV_AMD64_ST0 + 3: return "st3";
899 case CV_AMD64_ST0 + 4: return "st4";
900 case CV_AMD64_ST0 + 5: return "st5";
901 case CV_AMD64_ST0 + 6: return "st6";
902 case CV_AMD64_ST0 + 7: return "st7";
903
904 case CV_AMD64_EFLAGS: return "eflags";
905 case CV_AMD64_ES: return "es";
906 case CV_AMD64_CS: return "cs";
907 case CV_AMD64_SS: return "ss";
908 case CV_AMD64_DS: return "ds";
909 case CV_AMD64_FS: return "fs";
910 case CV_AMD64_GS: return "gs";
911 }
912 FIXME("Unknown register %x\n", regno);
913 return NULL;
914 }
915
916 static BOOL x86_64_fetch_minidump_thread(struct dump_context* dc, unsigned index, unsigned flags, const CONTEXT* ctx)
917 {
918 if (ctx->ContextFlags && (flags & ThreadWriteInstructionWindow))
919 {
920 /* FIXME: crop values across module boundaries, */
921 #ifdef __x86_64__
922 ULONG64 base = ctx->Rip <= 0x80 ? 0 : ctx->Rip - 0x80;
923 minidump_add_memory_block(dc, base, ctx->Rip + 0x80 - base, 0);
924 #endif
925 }
926
927 return TRUE;
928 }
929
930 static BOOL x86_64_fetch_minidump_module(struct dump_context* dc, unsigned index, unsigned flags)
931 {
932 /* FIXME: not sure about the flags... */
933 if (1)
934 {
935 /* FIXME: crop values across module boundaries, */
936 #ifdef __x86_64__
937 struct process* pcs;
938 struct module* module;
939 const RUNTIME_FUNCTION* rtf;
940 ULONG size;
941
942 if (!(pcs = process_find_by_handle(dc->hProcess)) ||
943 !(module = module_find_by_addr(pcs, dc->modules[index].base, DMT_UNKNOWN)))
944 return FALSE;
945 rtf = (const RUNTIME_FUNCTION*)pe_map_directory(module, IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size);
946 if (rtf)
947 {
948 const RUNTIME_FUNCTION* end = (const RUNTIME_FUNCTION*)((const char*)rtf + size);
949 UNWIND_INFO ui;
950
951 while (rtf + 1 < end)
952 {
953 while (rtf->UnwindData & 1) /* follow chained entry */
954 {
955 FIXME("RunTime_Function outside IMAGE_DIRECTORY_ENTRY_EXCEPTION unimplemented yet!\n");
956 return FALSE;
957 /* we need to read into the other process */
958 /* rtf = (RUNTIME_FUNCTION*)(module->module.BaseOfImage + (rtf->UnwindData & ~1)); */
959 }
960 if (ReadProcessMemory(dc->hProcess,
961 (void*)(dc->modules[index].base + rtf->UnwindData),
962 &ui, sizeof(ui), NULL))
963 minidump_add_memory_block(dc, dc->modules[index].base + rtf->UnwindData,
964 FIELD_OFFSET(UNWIND_INFO, UnwindCode) + ui.CountOfCodes * sizeof(UNWIND_CODE), 0);
965 rtf++;
966 }
967 }
968 #endif
969 }
970
971 return TRUE;
972 }
973
974 DECLSPEC_HIDDEN struct cpu cpu_x86_64 = {
975 IMAGE_FILE_MACHINE_AMD64,
976 8,
977 CV_AMD64_RSP,
978 x86_64_get_addr,
979 x86_64_stack_walk,
980 x86_64_find_runtime_function,
981 x86_64_map_dwarf_register,
982 x86_64_fetch_context_reg,
983 x86_64_fetch_regname,
984 x86_64_fetch_minidump_thread,
985 x86_64_fetch_minidump_module,
986 };
Windows API implementation