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mfplat: Read queue subscriber within the critical section.
[wine/zf.git] / dlls / ntdll / signal_x86_64.c
blobd88f7ae553a32596be2cb7b09181e97acbb0108c
1 /*
2 * x86-64 signal handling routines
3 *
4 * Copyright 1999, 2005 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #ifdef __x86_64__
22
23 #include <stdlib.h>
24 #include <stdarg.h>
25
26 #define NONAMELESSUNION
27 #define NONAMELESSSTRUCT
28 #include "ntstatus.h"
29 #define WIN32_NO_STATUS
30 #include "windef.h"
31 #include "winternl.h"
32 #include "wine/exception.h"
33 #include "wine/list.h"
34 #include "ntdll_misc.h"
35 #include "wine/debug.h"
36
37 WINE_DEFAULT_DEBUG_CHANNEL(seh);
38
39 typedef struct _SCOPE_TABLE
40 {
41 ULONG Count;
42 struct
43 {
44 ULONG BeginAddress;
45 ULONG EndAddress;
46 ULONG HandlerAddress;
47 ULONG JumpTarget;
48 } ScopeRecord[1];
49 } SCOPE_TABLE, *PSCOPE_TABLE;
50
51
52 /* layering violation: the setjmp buffer is defined in msvcrt, but used by RtlUnwindEx */
53 struct MSVCRT_JUMP_BUFFER
54 {
55 ULONG64 Frame;
56 ULONG64 Rbx;
57 ULONG64 Rsp;
58 ULONG64 Rbp;
59 ULONG64 Rsi;
60 ULONG64 Rdi;
61 ULONG64 R12;
62 ULONG64 R13;
63 ULONG64 R14;
64 ULONG64 R15;
65 ULONG64 Rip;
66 ULONG64 Spare;
67 M128A Xmm6;
68 M128A Xmm7;
69 M128A Xmm8;
70 M128A Xmm9;
71 M128A Xmm10;
72 M128A Xmm11;
73 M128A Xmm12;
74 M128A Xmm13;
75 M128A Xmm14;
76 M128A Xmm15;
77 };
78
79 /***********************************************************************
80 * Definitions for Win32 unwind tables
81 */
82
83 union handler_data
84 {
85 RUNTIME_FUNCTION chain;
86 ULONG handler;
87 };
88
89 struct opcode
90 {
91 BYTE offset;
92 BYTE code : 4;
93 BYTE info : 4;
94 };
95
96 struct UNWIND_INFO
97 {
98 BYTE version : 3;
99 BYTE flags : 5;
100 BYTE prolog;
101 BYTE count;
102 BYTE frame_reg : 4;
103 BYTE frame_offset : 4;
104 struct opcode opcodes[1]; /* info->count entries */
105 /* followed by handler_data */
106 };
107
108 #define UWOP_PUSH_NONVOL 0
109 #define UWOP_ALLOC_LARGE 1
110 #define UWOP_ALLOC_SMALL 2
111 #define UWOP_SET_FPREG 3
112 #define UWOP_SAVE_NONVOL 4
113 #define UWOP_SAVE_NONVOL_FAR 5
114 #define UWOP_EPILOG 6
115 #define UWOP_SAVE_XMM128 8
116 #define UWOP_SAVE_XMM128_FAR 9
117 #define UWOP_PUSH_MACHFRAME 10
118
119 static void dump_unwind_info( ULONG64 base, RUNTIME_FUNCTION *function )
120 {
121 static const char * const reg_names[16] =
122 { "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
123 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" };
124
125 union handler_data *handler_data;
126 struct UNWIND_INFO *info;
127 unsigned int i, count;
128
129 TRACE( "**** func %x-%x\n", function->BeginAddress, function->EndAddress );
130 for (;;)
131 {
132 if (function->UnwindData & 1)
133 {
134 RUNTIME_FUNCTION *next = (RUNTIME_FUNCTION *)((char *)base + (function->UnwindData & ~1));
135 TRACE( "unwind info for function %p-%p chained to function %p-%p\n",
136 (char *)base + function->BeginAddress, (char *)base + function->EndAddress,
137 (char *)base + next->BeginAddress, (char *)base + next->EndAddress );
138 function = next;
139 continue;
140 }
141 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
142
143 TRACE( "unwind info at %p flags %x prolog 0x%x bytes function %p-%p\n",
144 info, info->flags, info->prolog,
145 (char *)base + function->BeginAddress, (char *)base + function->EndAddress );
146
147 if (info->frame_reg)
148 TRACE( " frame register %s offset 0x%x(%%rsp)\n",
149 reg_names[info->frame_reg], info->frame_offset * 16 );
150
151 for (i = 0; i < info->count; i++)
152 {
153 TRACE( " 0x%x: ", info->opcodes[i].offset );
154 switch (info->opcodes[i].code)
155 {
156 case UWOP_PUSH_NONVOL:
157 TRACE( "pushq %%%s\n", reg_names[info->opcodes[i].info] );
158 break;
159 case UWOP_ALLOC_LARGE:
160 if (info->opcodes[i].info)
161 {
162 count = *(DWORD *)&info->opcodes[i+1];
163 i += 2;
164 }
165 else
166 {
167 count = *(USHORT *)&info->opcodes[i+1] * 8;
168 i++;
169 }
170 TRACE( "subq $0x%x,%%rsp\n", count );
171 break;
172 case UWOP_ALLOC_SMALL:
173 count = (info->opcodes[i].info + 1) * 8;
174 TRACE( "subq $0x%x,%%rsp\n", count );
175 break;
176 case UWOP_SET_FPREG:
177 TRACE( "leaq 0x%x(%%rsp),%s\n",
178 info->frame_offset * 16, reg_names[info->frame_reg] );
179 break;
180 case UWOP_SAVE_NONVOL:
181 count = *(USHORT *)&info->opcodes[i+1] * 8;
182 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
183 i++;
184 break;
185 case UWOP_SAVE_NONVOL_FAR:
186 count = *(DWORD *)&info->opcodes[i+1];
187 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
188 i += 2;
189 break;
190 case UWOP_SAVE_XMM128:
191 count = *(USHORT *)&info->opcodes[i+1] * 16;
192 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
193 i++;
194 break;
195 case UWOP_SAVE_XMM128_FAR:
196 count = *(DWORD *)&info->opcodes[i+1];
197 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
198 i += 2;
199 break;
200 case UWOP_PUSH_MACHFRAME:
201 TRACE( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
202 break;
203 case UWOP_EPILOG:
204 if (info->version == 2)
205 {
206 unsigned int offset;
207 if (info->opcodes[i].info)
208 offset = info->opcodes[i].offset;
209 else
210 offset = (info->opcodes[i+1].info << 8) + info->opcodes[i+1].offset;
211 TRACE("epilog %p-%p\n", (char *)base + function->EndAddress - offset,
212 (char *)base + function->EndAddress - offset + info->opcodes[i].offset );
213 i += 1;
214 break;
215 }
216 default:
217 FIXME( "unknown code %u\n", info->opcodes[i].code );
218 break;
219 }
220 }
221
222 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
223 if (info->flags & UNW_FLAG_CHAININFO)
224 {
225 TRACE( " chained to function %p-%p\n",
226 (char *)base + handler_data->chain.BeginAddress,
227 (char *)base + handler_data->chain.EndAddress );
228 function = &handler_data->chain;
229 continue;
230 }
231 if (info->flags & (UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER))
232 TRACE( " handler %p data at %p\n",
233 (char *)base + handler_data->handler, &handler_data->handler + 1 );
234 break;
235 }
236 }
237
238 static void dump_scope_table( ULONG64 base, const SCOPE_TABLE *table )
239 {
240 unsigned int i;
241
242 TRACE( "scope table at %p\n", table );
243 for (i = 0; i < table->Count; i++)
244 TRACE( " %u: %p-%p handler %p target %p\n", i,
245 (char *)base + table->ScopeRecord[i].BeginAddress,
246 (char *)base + table->ScopeRecord[i].EndAddress,
247 (char *)base + table->ScopeRecord[i].HandlerAddress,
248 (char *)base + table->ScopeRecord[i].JumpTarget );
249 }
250
251
252 /***********************************************************************
253 * virtual_unwind
254 */
255 static NTSTATUS virtual_unwind( ULONG type, DISPATCHER_CONTEXT *dispatch, CONTEXT *context )
256 {
257 LDR_DATA_TABLE_ENTRY *module;
258 NTSTATUS status;
259
260 dispatch->ImageBase = 0;
261 dispatch->ScopeIndex = 0;
262 dispatch->ControlPc = context->Rip;
263
264 /* first look for PE exception information */
265
266 if ((dispatch->FunctionEntry = lookup_function_info( context->Rip, &dispatch->ImageBase, &module )))
267 {
268 dispatch->LanguageHandler = RtlVirtualUnwind( type, dispatch->ImageBase, context->Rip,
269 dispatch->FunctionEntry, context,
270 &dispatch->HandlerData, &dispatch->EstablisherFrame,
271 NULL );
272 return STATUS_SUCCESS;
273 }
274
275 /* then look for host system exception information */
276
277 if (!module || (module->Flags & LDR_WINE_INTERNAL))
278 {
279 status = unix_funcs->unwind_builtin_dll( type, dispatch, context );
280
281 if (!status && dispatch->LanguageHandler && !module)
282 {
283 FIXME( "calling personality routine in system library not supported yet\n" );
284 dispatch->LanguageHandler = NULL;
285 }
286 if (status != STATUS_UNSUCCESSFUL) return status;
287 }
288 else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
289
290 /* no exception information, treat as a leaf function */
291
292 dispatch->EstablisherFrame = context->Rsp;
293 dispatch->LanguageHandler = NULL;
294 context->Rip = *(ULONG64 *)context->Rsp;
295 context->Rsp = context->Rsp + sizeof(ULONG64);
296 return STATUS_SUCCESS;
297 }
298
299
300 /**************************************************************************
301 * __chkstk (NTDLL.@)
302 *
303 * Supposed to touch all the stack pages, but we shouldn't need that.
304 */
305 __ASM_GLOBAL_FUNC( __chkstk, "ret" );
306
307
308 /***********************************************************************
309 * RtlCaptureContext (NTDLL.@)
310 */
311 __ASM_GLOBAL_FUNC( RtlCaptureContext,
312 "pushfq\n\t"
313 __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
314 "movl $0x10000f,0x30(%rcx)\n\t" /* context->ContextFlags */
315 "stmxcsr 0x34(%rcx)\n\t" /* context->MxCsr */
316 "movw %cs,0x38(%rcx)\n\t" /* context->SegCs */
317 "movw %ds,0x3a(%rcx)\n\t" /* context->SegDs */
318 "movw %es,0x3c(%rcx)\n\t" /* context->SegEs */
319 "movw %fs,0x3e(%rcx)\n\t" /* context->SegFs */
320 "movw %gs,0x40(%rcx)\n\t" /* context->SegGs */
321 "movw %ss,0x42(%rcx)\n\t" /* context->SegSs */
322 "popq 0x44(%rcx)\n\t" /* context->Eflags */
323 __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
324 "movq %rax,0x78(%rcx)\n\t" /* context->Rax */
325 "movq %rcx,0x80(%rcx)\n\t" /* context->Rcx */
326 "movq %rdx,0x88(%rcx)\n\t" /* context->Rdx */
327 "movq %rbx,0x90(%rcx)\n\t" /* context->Rbx */
328 "leaq 8(%rsp),%rax\n\t"
329 "movq %rax,0x98(%rcx)\n\t" /* context->Rsp */
330 "movq %rbp,0xa0(%rcx)\n\t" /* context->Rbp */
331 "movq %rsi,0xa8(%rcx)\n\t" /* context->Rsi */
332 "movq %rdi,0xb0(%rcx)\n\t" /* context->Rdi */
333 "movq %r8,0xb8(%rcx)\n\t" /* context->R8 */
334 "movq %r9,0xc0(%rcx)\n\t" /* context->R9 */
335 "movq %r10,0xc8(%rcx)\n\t" /* context->R10 */
336 "movq %r11,0xd0(%rcx)\n\t" /* context->R11 */
337 "movq %r12,0xd8(%rcx)\n\t" /* context->R12 */
338 "movq %r13,0xe0(%rcx)\n\t" /* context->R13 */
339 "movq %r14,0xe8(%rcx)\n\t" /* context->R14 */
340 "movq %r15,0xf0(%rcx)\n\t" /* context->R15 */
341 "movq (%rsp),%rax\n\t"
342 "movq %rax,0xf8(%rcx)\n\t" /* context->Rip */
343 "fxsave 0x100(%rcx)\n\t" /* context->FltSave */
344 "ret" );
345
346 /******************************************************************************
347 * RtlWow64GetThreadContext (NTDLL.@)
348 */
349 NTSTATUS WINAPI RtlWow64GetThreadContext( HANDLE handle, WOW64_CONTEXT *context )
350 {
351 return NtQueryInformationThread( handle, ThreadWow64Context, context, sizeof(*context), NULL );
352 }
353
354
355 /******************************************************************************
356 * RtlWow64SetThreadContext (NTDLL.@)
357 */
358 NTSTATUS WINAPI RtlWow64SetThreadContext( HANDLE handle, const WOW64_CONTEXT *context )
359 {
360 return NtSetInformationThread( handle, ThreadWow64Context, context, sizeof(*context) );
361 }
362
363
364 static DWORD __cdecl nested_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
365 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
366 {
367 if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
368 rec->ExceptionFlags |= EH_NESTED_CALL;
369
370 return ExceptionContinueSearch;
371 }
372
373 /**********************************************************************
374 * call_handler
375 *
376 * Call a single exception handler.
377 * FIXME: Handle nested exceptions.
378 */
379 static DWORD call_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch )
380 {
381 EXCEPTION_REGISTRATION_RECORD frame;
382 DWORD res;
383
384 frame.Handler = nested_exception_handler;
385 __wine_push_frame( &frame );
386
387 TRACE( "calling handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
388 dispatch->LanguageHandler, rec, (void *)dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
389 res = dispatch->LanguageHandler( rec, (void *)dispatch->EstablisherFrame, context, dispatch );
390 TRACE( "handler at %p returned %u\n", dispatch->LanguageHandler, res );
391
392 rec->ExceptionFlags &= EH_NONCONTINUABLE;
393 __wine_pop_frame( &frame );
394 return res;
395 }
396
397
398 /**********************************************************************
399 * call_teb_handler
400 *
401 * Call a single exception handler from the TEB chain.
402 * FIXME: Handle nested exceptions.
403 */
404 static DWORD call_teb_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch,
405 EXCEPTION_REGISTRATION_RECORD *teb_frame )
406 {
407 DWORD res;
408
409 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
410 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
411 res = teb_frame->Handler( rec, teb_frame, context, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
412 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
413 return res;
414 }
415
416
417 /**********************************************************************
418 * call_stack_handlers
419 *
420 * Call the stack handlers chain.
421 */
422 static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *orig_context )
423 {
424 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
425 UNWIND_HISTORY_TABLE table;
426 DISPATCHER_CONTEXT dispatch;
427 CONTEXT context;
428 NTSTATUS status;
429
430 context = *orig_context;
431 context.ContextFlags &= ~0x40; /* Clear xstate flag. */
432
433 dispatch.TargetIp = 0;
434 dispatch.ContextRecord = &context;
435 dispatch.HistoryTable = &table;
436 for (;;)
437 {
438 status = virtual_unwind( UNW_FLAG_EHANDLER, &dispatch, &context );
439 if (status != STATUS_SUCCESS) return status;
440
441 unwind_done:
442 if (!dispatch.EstablisherFrame) break;
443
444 if ((dispatch.EstablisherFrame & 7) ||
445 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
446 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
447 {
448 ERR( "invalid frame %p (%p-%p)\n", (void *)dispatch.EstablisherFrame,
449 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
450 rec->ExceptionFlags |= EH_STACK_INVALID;
451 break;
452 }
453
454 if (dispatch.LanguageHandler)
455 {
456 switch (call_handler( rec, orig_context, &dispatch ))
457 {
458 case ExceptionContinueExecution:
459 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
460 return STATUS_SUCCESS;
461 case ExceptionContinueSearch:
462 break;
463 case ExceptionNestedException:
464 FIXME( "nested exception\n" );
465 break;
466 case ExceptionCollidedUnwind: {
467 ULONG64 frame;
468
469 context = *dispatch.ContextRecord;
470 dispatch.ContextRecord = &context;
471 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
472 dispatch.ControlPc, dispatch.FunctionEntry,
473 &context, NULL, &frame, NULL );
474 goto unwind_done;
475 }
476 default:
477 return STATUS_INVALID_DISPOSITION;
478 }
479 }
480 /* hack: call wine handlers registered in the tib list */
481 else while ((ULONG64)teb_frame < context.Rsp)
482 {
483 TRACE( "found wine frame %p rsp %p handler %p\n",
484 teb_frame, (void *)context.Rsp, teb_frame->Handler );
485 dispatch.EstablisherFrame = (ULONG64)teb_frame;
486 switch (call_teb_handler( rec, orig_context, &dispatch, teb_frame ))
487 {
488 case ExceptionContinueExecution:
489 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
490 return STATUS_SUCCESS;
491 case ExceptionContinueSearch:
492 break;
493 case ExceptionNestedException:
494 FIXME( "nested exception\n" );
495 break;
496 case ExceptionCollidedUnwind: {
497 ULONG64 frame;
498
499 context = *dispatch.ContextRecord;
500 dispatch.ContextRecord = &context;
501 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
502 dispatch.ControlPc, dispatch.FunctionEntry,
503 &context, NULL, &frame, NULL );
504 teb_frame = teb_frame->Prev;
505 goto unwind_done;
506 }
507 default:
508 return STATUS_INVALID_DISPOSITION;
509 }
510 teb_frame = teb_frame->Prev;
511 }
512
513 if (context.Rsp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break;
514 }
515 return STATUS_UNHANDLED_EXCEPTION;
516 }
517
518
519 NTSTATUS WINAPI dispatch_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
520 {
521 NTSTATUS status;
522 DWORD c;
523
524 TRACE( "code=%x flags=%x addr=%p ip=%p tid=%04x\n",
525 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
526 (void *)context->Rip, GetCurrentThreadId() );
527 for (c = 0; c < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); c++)
528 TRACE( " info[%d]=%016lx\n", c, rec->ExceptionInformation[c] );
529
530 if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
531 {
532 if (rec->ExceptionInformation[1] >> 16)
533 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
534 rec->ExceptionAddress,
535 (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
536 else
537 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
538 rec->ExceptionAddress,
539 (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
540 }
541 else if (rec->ExceptionCode == EXCEPTION_WINE_NAME_THREAD && rec->ExceptionInformation[0] == 0x1000)
542 {
543 WARN( "Thread %04x renamed to %s\n", (DWORD)rec->ExceptionInformation[2], debugstr_a((char *)rec->ExceptionInformation[1]) );
544 }
545 else if (rec->ExceptionCode == DBG_PRINTEXCEPTION_C)
546 {
547 WARN( "%s\n", debugstr_an((char *)rec->ExceptionInformation[1], rec->ExceptionInformation[0] - 1) );
548 }
549 else if (rec->ExceptionCode == DBG_PRINTEXCEPTION_WIDE_C)
550 {
551 WARN( "%s\n", debugstr_wn((WCHAR *)rec->ExceptionInformation[1], rec->ExceptionInformation[0] - 1) );
552 }
553 else
554 {
555 if (rec->ExceptionCode == STATUS_ASSERTION_FAILURE)
556 ERR( "%s exception (code=%x) raised\n", debugstr_exception_code(rec->ExceptionCode), rec->ExceptionCode );
557 else
558 WARN( "%s exception (code=%x) raised\n", debugstr_exception_code(rec->ExceptionCode), rec->ExceptionCode );
559
560 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
561 context->Rax, context->Rbx, context->Rcx, context->Rdx );
562 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
563 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
564 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
565 context->R8, context->R9, context->R10, context->R11 );
566 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
567 context->R12, context->R13, context->R14, context->R15 );
568 }
569
570 /* Legends of Runeterra depends on having SegDs == SegSs in an exception
571 * handler. */
572 context->SegDs = context->SegSs;
573
574 if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
575 NtContinue( context, FALSE );
576
577 if ((status = call_stack_handlers( rec, context )) == STATUS_SUCCESS)
578 NtContinue( context, FALSE );
579
580 if (status != STATUS_UNHANDLED_EXCEPTION) RtlRaiseStatus( status );
581 return NtRaiseException( rec, context, FALSE );
582 }
583
584
585 /*******************************************************************
586 * KiUserExceptionDispatcher (NTDLL.@)
587 */
588 __ASM_GLOBAL_FUNC( KiUserExceptionDispatcher,
589 "mov 0x98(%rsp),%rcx\n\t" /* context->Rsp */
590 "mov 0xf8(%rsp),%rdx\n\t" /* context->Rip */
591 "mov %rdx,-0x8(%rcx)\n\t"
592 "mov %rbp,-0x10(%rcx)\n\t"
593 "mov %rdi,-0x18(%rcx)\n\t"
594 "mov %rsi,-0x20(%rcx)\n\t"
595 "lea -0x20(%rcx),%rbp\n\t"
596 "mov %rsp,%rdx\n\t" /* context */
597 "lea 0x4f0(%rsp),%rcx\n\t" /* rec */
598 __ASM_SEH(".seh_pushreg %rbp\n\t")
599 __ASM_SEH(".seh_pushreg %rdi\n\t")
600 __ASM_SEH(".seh_pushreg %rsi\n\t")
601 __ASM_SEH(".seh_setframe %rbp,0\n\t")
602 __ASM_SEH(".seh_endprologue\n\t")
603
604 __ASM_CFI(".cfi_signal_frame\n\t")
605 __ASM_CFI(".cfi_adjust_cfa_offset 0x20\n\t")
606 __ASM_CFI(".cfi_def_cfa %rbp,0x20\n\t")
607 __ASM_CFI(".cfi_rel_offset %rip,0x18\n\t")
608 __ASM_CFI(".cfi_rel_offset %rbp,0x10\n\t")
609 __ASM_CFI(".cfi_rel_offset %rdi,0x8\n\t")
610 __ASM_CFI(".cfi_rel_offset %rsi,0\n\t")
611 "call " __ASM_NAME("dispatch_exception") "\n\t"
612 "int3")
613
614
615 /*******************************************************************
616 * KiUserApcDispatcher (NTDLL.@)
617 */
618 void WINAPI dispatch_apc( CONTEXT *context, ULONG_PTR ctx, ULONG_PTR arg1, ULONG_PTR arg2,
619 PNTAPCFUNC func )
620 {
621 func( ctx, arg1, arg2 );
622 NtContinue( context, TRUE );
623 }
624
625 __ASM_GLOBAL_FUNC( KiUserApcDispatcher,
626 "addq $0x8,%rsp\n\t"
627 "mov 0x98(%rcx),%r10\n\t" /* context->Rsp */
628 "mov 0xf8(%rcx),%r11\n\t" /* context->Rip */
629 "mov %r11,-0x8(%r10)\n\t"
630 "mov %rbp,-0x10(%r10)\n\t"
631 "lea -0x10(%r10),%rbp\n\t"
632 __ASM_SEH(".seh_pushreg %rbp\n\t")
633 __ASM_SEH(".seh_setframe %rbp,0\n\t")
634 __ASM_SEH(".seh_endprologue\n\t")
635 __ASM_CFI(".cfi_signal_frame\n\t")
636 __ASM_CFI(".cfi_adjust_cfa_offset 0x10\n\t")
637 __ASM_CFI(".cfi_def_cfa %rbp,0x10\n\t")
638 __ASM_CFI(".cfi_rel_offset %rip,0x8\n\t")
639 __ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
640 "call " __ASM_NAME("dispatch_apc") "\n\t"
641 "int3")
642
643
644 static ULONG64 get_int_reg( CONTEXT *context, int reg )
645 {
646 return *(&context->Rax + reg);
647 }
648
649 static void set_int_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, ULONG64 *val )
650 {
651 *(&context->Rax + reg) = *val;
652 if (ctx_ptr) ctx_ptr->u2.IntegerContext[reg] = val;
653 }
654
655 static void set_float_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, M128A *val )
656 {
657 /* Use a memcpy() to avoid issues if val is misaligned. */
658 memcpy(&context->u.s.Xmm0 + reg, val, sizeof(*val));
659 if (ctx_ptr) ctx_ptr->u.FloatingContext[reg] = val;
660 }
661
662 static int get_opcode_size( struct opcode op )
663 {
664 switch (op.code)
665 {
666 case UWOP_ALLOC_LARGE:
667 return 2 + (op.info != 0);
668 case UWOP_SAVE_NONVOL:
669 case UWOP_SAVE_XMM128:
670 case UWOP_EPILOG:
671 return 2;
672 case UWOP_SAVE_NONVOL_FAR:
673 case UWOP_SAVE_XMM128_FAR:
674 return 3;
675 default:
676 return 1;
677 }
678 }
679
680 static BOOL is_inside_epilog( BYTE *pc, ULONG64 base, const RUNTIME_FUNCTION *function )
681 {
682 /* add or lea must be the first instruction, and it must have a rex.W prefix */
683 if ((pc[0] & 0xf8) == 0x48)
684 {
685 switch (pc[1])
686 {
687 case 0x81: /* add $nnnn,%rsp */
688 if (pc[0] == 0x48 && pc[2] == 0xc4)
689 {
690 pc += 7;
691 break;
692 }
693 return FALSE;
694 case 0x83: /* add $n,%rsp */
695 if (pc[0] == 0x48 && pc[2] == 0xc4)
696 {
697 pc += 4;
698 break;
699 }
700 return FALSE;
701 case 0x8d: /* lea n(reg),%rsp */
702 if (pc[0] & 0x06) return FALSE; /* rex.RX must be cleared */
703 if (((pc[2] >> 3) & 7) != 4) return FALSE; /* dest reg mus be %rsp */
704 if ((pc[2] & 7) == 4) return FALSE; /* no SIB byte allowed */
705 if ((pc[2] >> 6) == 1) /* 8-bit offset */
706 {
707 pc += 4;
708 break;
709 }
710 if ((pc[2] >> 6) == 2) /* 32-bit offset */
711 {
712 pc += 7;
713 break;
714 }
715 return FALSE;
716 }
717 }
718
719 /* now check for various pop instructions */
720
721 for (;;)
722 {
723 if ((*pc & 0xf0) == 0x40) pc++; /* rex prefix */
724
725 switch (*pc)
726 {
727 case 0x58: /* pop %rax/%r8 */
728 case 0x59: /* pop %rcx/%r9 */
729 case 0x5a: /* pop %rdx/%r10 */
730 case 0x5b: /* pop %rbx/%r11 */
731 case 0x5c: /* pop %rsp/%r12 */
732 case 0x5d: /* pop %rbp/%r13 */
733 case 0x5e: /* pop %rsi/%r14 */
734 case 0x5f: /* pop %rdi/%r15 */
735 pc++;
736 continue;
737 case 0xc2: /* ret $nn */
738 case 0xc3: /* ret */
739 return TRUE;
740 case 0xe9: /* jmp nnnn */
741 pc += 5 + *(LONG *)(pc + 1);
742 if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress)
743 continue;
744 break;
745 case 0xeb: /* jmp n */
746 pc += 2 + (signed char)pc[1];
747 if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress)
748 continue;
749 break;
750 case 0xf3: /* rep; ret (for amd64 prediction bug) */
751 return pc[1] == 0xc3;
752 }
753 return FALSE;
754 }
755 }
756
757 /* execute a function epilog, which must have been validated with is_inside_epilog() */
758 static void interpret_epilog( BYTE *pc, CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
759 {
760 for (;;)
761 {
762 BYTE rex = 0;
763
764 if ((*pc & 0xf0) == 0x40) rex = *pc++ & 0x0f; /* rex prefix */
765
766 switch (*pc)
767 {
768 case 0x58: /* pop %rax/r8 */
769 case 0x59: /* pop %rcx/r9 */
770 case 0x5a: /* pop %rdx/r10 */
771 case 0x5b: /* pop %rbx/r11 */
772 case 0x5c: /* pop %rsp/r12 */
773 case 0x5d: /* pop %rbp/r13 */
774 case 0x5e: /* pop %rsi/r14 */
775 case 0x5f: /* pop %rdi/r15 */
776 set_int_reg( context, ctx_ptr, *pc - 0x58 + (rex & 1) * 8, (ULONG64 *)context->Rsp );
777 context->Rsp += sizeof(ULONG64);
778 pc++;
779 continue;
780 case 0x81: /* add $nnnn,%rsp */
781 context->Rsp += *(LONG *)(pc + 2);
782 pc += 2 + sizeof(LONG);
783 continue;
784 case 0x83: /* add $n,%rsp */
785 context->Rsp += (signed char)pc[2];
786 pc += 3;
787 continue;
788 case 0x8d:
789 if ((pc[1] >> 6) == 1) /* lea n(reg),%rsp */
790 {
791 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + (signed char)pc[2];
792 pc += 3;
793 }
794 else /* lea nnnn(reg),%rsp */
795 {
796 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + *(LONG *)(pc + 2);
797 pc += 2 + sizeof(LONG);
798 }
799 continue;
800 case 0xc2: /* ret $nn */
801 context->Rip = *(ULONG64 *)context->Rsp;
802 context->Rsp += sizeof(ULONG64) + *(WORD *)(pc + 1);
803 return;
804 case 0xc3: /* ret */
805 case 0xf3: /* rep; ret */
806 context->Rip = *(ULONG64 *)context->Rsp;
807 context->Rsp += sizeof(ULONG64);
808 return;
809 case 0xe9: /* jmp nnnn */
810 pc += 5 + *(LONG *)(pc + 1);
811 continue;
812 case 0xeb: /* jmp n */
813 pc += 2 + (signed char)pc[1];
814 continue;
815 }
816 return;
817 }
818 }
819
820 /**********************************************************************
821 * RtlVirtualUnwind (NTDLL.@)
822 */
823 PVOID WINAPI RtlVirtualUnwind( ULONG type, ULONG64 base, ULONG64 pc,
824 RUNTIME_FUNCTION *function, CONTEXT *context,
825 PVOID *data, ULONG64 *frame_ret,
826 KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
827 {
828 union handler_data *handler_data;
829 ULONG64 frame, off;
830 struct UNWIND_INFO *info;
831 unsigned int i, prolog_offset;
832 BOOL mach_frame = FALSE;
833
834 TRACE( "type %x rip %p rsp %p\n", type, (void *)pc, (void *)context->Rsp );
835 if (TRACE_ON(seh)) dump_unwind_info( base, function );
836
837 frame = *frame_ret = context->Rsp;
838 for (;;)
839 {
840 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
841 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
842
843 if (info->version != 1 && info->version != 2)
844 {
845 FIXME( "unknown unwind info version %u at %p\n", info->version, info );
846 return NULL;
847 }
848
849 if (info->frame_reg)
850 frame = get_int_reg( context, info->frame_reg ) - info->frame_offset * 16;
851
852 /* check if in prolog */
853 if (pc >= base + function->BeginAddress && pc < base + function->BeginAddress + info->prolog)
854 {
855 TRACE("inside prolog.\n");
856 prolog_offset = pc - base - function->BeginAddress;
857 }
858 else
859 {
860 prolog_offset = ~0;
861 /* Since Win10 1809 epilogue does not have a special treatment in case of zero opcode count. */
862 if (info->count && is_inside_epilog( (BYTE *)pc, base, function ))
863 {
864 TRACE("inside epilog.\n");
865 interpret_epilog( (BYTE *)pc, context, ctx_ptr );
866 *frame_ret = frame;
867 return NULL;
868 }
869 }
870
871 for (i = 0; i < info->count; i += get_opcode_size(info->opcodes[i]))
872 {
873 if (prolog_offset < info->opcodes[i].offset) continue; /* skip it */
874
875 switch (info->opcodes[i].code)
876 {
877 case UWOP_PUSH_NONVOL: /* pushq %reg */
878 set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)context->Rsp );
879 context->Rsp += sizeof(ULONG64);
880 break;
881 case UWOP_ALLOC_LARGE: /* subq $nn,%rsp */
882 if (info->opcodes[i].info) context->Rsp += *(DWORD *)&info->opcodes[i+1];
883 else context->Rsp += *(USHORT *)&info->opcodes[i+1] * 8;
884 break;
885 case UWOP_ALLOC_SMALL: /* subq $n,%rsp */
886 context->Rsp += (info->opcodes[i].info + 1) * 8;
887 break;
888 case UWOP_SET_FPREG: /* leaq nn(%rsp),%framereg */
889 context->Rsp = *frame_ret = frame;
890 break;
891 case UWOP_SAVE_NONVOL: /* movq %reg,n(%rsp) */
892 off = frame + *(USHORT *)&info->opcodes[i+1] * 8;
893 set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)off );
894 break;
895 case UWOP_SAVE_NONVOL_FAR: /* movq %reg,nn(%rsp) */
896 off = frame + *(DWORD *)&info->opcodes[i+1];
897 set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)off );
898 break;
899 case UWOP_SAVE_XMM128: /* movaps %xmmreg,n(%rsp) */
900 off = frame + *(USHORT *)&info->opcodes[i+1] * 16;
901 set_float_reg( context, ctx_ptr, info->opcodes[i].info, (M128A *)off );
902 break;
903 case UWOP_SAVE_XMM128_FAR: /* movaps %xmmreg,nn(%rsp) */
904 off = frame + *(DWORD *)&info->opcodes[i+1];
905 set_float_reg( context, ctx_ptr, info->opcodes[i].info, (M128A *)off );
906 break;
907 case UWOP_PUSH_MACHFRAME:
908 if (info->flags & UNW_FLAG_CHAININFO)
909 {
910 FIXME("PUSH_MACHFRAME with chained unwind info.\n");
911 break;
912 }
913 if (i + get_opcode_size(info->opcodes[i]) < info->count )
914 {
915 FIXME("PUSH_MACHFRAME is not the last opcode.\n");
916 break;
917 }
918
919 if (info->opcodes[i].info)
920 context->Rsp += 0x8;
921
922 context->Rip = *(ULONG64 *)context->Rsp;
923 context->Rsp = *(ULONG64 *)(context->Rsp + 24);
924 mach_frame = TRUE;
925 break;
926 case UWOP_EPILOG:
927 if (info->version == 2)
928 break; /* nothing to do */
929 default:
930 FIXME( "unknown code %u\n", info->opcodes[i].code );
931 break;
932 }
933 }
934
935 if (!(info->flags & UNW_FLAG_CHAININFO)) break;
936 function = &handler_data->chain; /* restart with the chained info */
937 }
938
939 if (!mach_frame)
940 {
941 /* now pop return address */
942 context->Rip = *(ULONG64 *)context->Rsp;
943 context->Rsp += sizeof(ULONG64);
944 }
945
946 if (!(info->flags & type)) return NULL; /* no matching handler */
947 if (prolog_offset != ~0) return NULL; /* inside prolog */
948
949 *data = &handler_data->handler + 1;
950 return (char *)base + handler_data->handler;
951 }
952
953 struct unwind_exception_frame
954 {
955 EXCEPTION_REGISTRATION_RECORD frame;
956 DISPATCHER_CONTEXT *dispatch;
957 };
958
959 /**********************************************************************
960 * unwind_exception_handler
961 *
962 * Handler for exceptions happening while calling an unwind handler.
963 */
964 static DWORD __cdecl unwind_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
965 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
966 {
967 struct unwind_exception_frame *unwind_frame = (struct unwind_exception_frame *)frame;
968 DISPATCHER_CONTEXT *dispatch = (DISPATCHER_CONTEXT *)dispatcher;
969
970 /* copy the original dispatcher into the current one, except for the TargetIp */
971 dispatch->ControlPc = unwind_frame->dispatch->ControlPc;
972 dispatch->ImageBase = unwind_frame->dispatch->ImageBase;
973 dispatch->FunctionEntry = unwind_frame->dispatch->FunctionEntry;
974 dispatch->EstablisherFrame = unwind_frame->dispatch->EstablisherFrame;
975 dispatch->ContextRecord = unwind_frame->dispatch->ContextRecord;
976 dispatch->LanguageHandler = unwind_frame->dispatch->LanguageHandler;
977 dispatch->HandlerData = unwind_frame->dispatch->HandlerData;
978 dispatch->HistoryTable = unwind_frame->dispatch->HistoryTable;
979 dispatch->ScopeIndex = unwind_frame->dispatch->ScopeIndex;
980 TRACE( "detected collided unwind\n" );
981 return ExceptionCollidedUnwind;
982 }
983
984 /**********************************************************************
985 * call_unwind_handler
986 *
987 * Call a single unwind handler.
988 */
989 static DWORD call_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch )
990 {
991 struct unwind_exception_frame frame;
992 DWORD res;
993
994 frame.frame.Handler = unwind_exception_handler;
995 frame.dispatch = dispatch;
996 __wine_push_frame( &frame.frame );
997
998 TRACE( "calling handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
999 dispatch->LanguageHandler, rec, (void *)dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
1000 res = dispatch->LanguageHandler( rec, (void *)dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
1001 TRACE( "handler %p returned %x\n", dispatch->LanguageHandler, res );
1002
1003 __wine_pop_frame( &frame.frame );
1004
1005 switch (res)
1006 {
1007 case ExceptionContinueSearch:
1008 case ExceptionCollidedUnwind:
1009 break;
1010 default:
1011 raise_status( STATUS_INVALID_DISPOSITION, rec );
1012 break;
1013 }
1014
1015 return res;
1016 }
1017
1018
1019 /**********************************************************************
1020 * call_teb_unwind_handler
1021 *
1022 * Call a single unwind handler from the TEB chain.
1023 */
1024 static DWORD call_teb_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
1025 EXCEPTION_REGISTRATION_RECORD *teb_frame )
1026 {
1027 DWORD res;
1028
1029 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
1030 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
1031 res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
1032 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
1033
1034 switch (res)
1035 {
1036 case ExceptionContinueSearch:
1037 case ExceptionCollidedUnwind:
1038 break;
1039 default:
1040 raise_status( STATUS_INVALID_DISPOSITION, rec );
1041 break;
1042 }
1043
1044 return res;
1045 }
1046
1047
1048 /**********************************************************************
1049 * call_consolidate_callback
1050 *
1051 * Wrapper function to call a consolidate callback from a fake frame.
1052 * If the callback executes RtlUnwindEx (like for example done in C++ handlers),
1053 * we have to skip all frames which were already processed. To do that we
1054 * trick the unwinding functions into thinking the call came from the specified
1055 * context. All CFI instructions are either DW_CFA_def_cfa_expression or
1056 * DW_CFA_expression, and the expressions have the following format:
1057 *
1058 * DW_OP_breg6; sleb128 0x10 | Load %rbp + 0x10
1059 * DW_OP_deref | Get *(%rbp + 0x10) == context
1060 * DW_OP_plus_uconst; uleb128 <OFFSET> | Add offset to get struct member
1061 * [DW_OP_deref] | Dereference, only for CFA
1062 */
1063 extern void * WINAPI call_consolidate_callback( CONTEXT *context,
1064 void *(CALLBACK *callback)(EXCEPTION_RECORD *),
1065 EXCEPTION_RECORD *rec );
1066 __ASM_GLOBAL_FUNC( call_consolidate_callback,
1067 "pushq %rbp\n\t"
1068 __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
1069 __ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
1070 "movq %rsp,%rbp\n\t"
1071 __ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
1072
1073 /* Setup SEH machine frame. */
1074 "subq $0x28,%rsp\n\t"
1075 __ASM_CFI(".cfi_adjust_cfa_offset 0x28\n\t")
1076 "movq 0xf8(%rcx),%rax\n\t" /* Context->Rip */
1077 "movq %rax,(%rsp)\n\t"
1078 "movq 0x98(%rcx),%rax\n\t" /* context->Rsp */
1079 "movq %rax,0x18(%rsp)\n\t"
1080 __ASM_SEH(".seh_pushframe\n\t")
1081 __ASM_SEH(".seh_endprologue\n\t")
1082
1083 "subq $0x108,%rsp\n\t" /* 10*16 (float regs) + 8*8 (int regs) + 32 (shadow store) + 8 (align). */
1084 __ASM_SEH(".seh_stackalloc 0x108\n\t")
1085 __ASM_CFI(".cfi_adjust_cfa_offset 0x108\n\t")
1086
1087 /* Setup CFI unwind to context. */
1088 "movq %rcx,0x10(%rbp)\n\t"
1089 __ASM_CFI(".cfi_remember_state\n\t")
1090 __ASM_CFI(".cfi_escape 0x0f,0x07,0x76,0x10,0x06,0x23,0x98,0x01,0x06\n\t") /* CFA */
1091 __ASM_CFI(".cfi_escape 0x10,0x03,0x06,0x76,0x10,0x06,0x23,0x90,0x01\n\t") /* %rbx */
1092 __ASM_CFI(".cfi_escape 0x10,0x04,0x06,0x76,0x10,0x06,0x23,0xa8,0x01\n\t") /* %rsi */
1093 __ASM_CFI(".cfi_escape 0x10,0x05,0x06,0x76,0x10,0x06,0x23,0xb0,0x01\n\t") /* %rdi */
1094 __ASM_CFI(".cfi_escape 0x10,0x06,0x06,0x76,0x10,0x06,0x23,0xa0,0x01\n\t") /* %rbp */
1095 __ASM_CFI(".cfi_escape 0x10,0x0c,0x06,0x76,0x10,0x06,0x23,0xd8,0x01\n\t") /* %r12 */
1096 __ASM_CFI(".cfi_escape 0x10,0x0d,0x06,0x76,0x10,0x06,0x23,0xe0,0x01\n\t") /* %r13 */
1097 __ASM_CFI(".cfi_escape 0x10,0x0e,0x06,0x76,0x10,0x06,0x23,0xe8,0x01\n\t") /* %r14 */
1098 __ASM_CFI(".cfi_escape 0x10,0x0f,0x06,0x76,0x10,0x06,0x23,0xf0,0x01\n\t") /* %r15 */
1099 __ASM_CFI(".cfi_escape 0x10,0x10,0x06,0x76,0x10,0x06,0x23,0xf8,0x01\n\t") /* %rip */
1100 __ASM_CFI(".cfi_escape 0x10,0x17,0x06,0x76,0x10,0x06,0x23,0x80,0x04\n\t") /* %xmm6 */
1101 __ASM_CFI(".cfi_escape 0x10,0x18,0x06,0x76,0x10,0x06,0x23,0x90,0x04\n\t") /* %xmm7 */
1102 __ASM_CFI(".cfi_escape 0x10,0x19,0x06,0x76,0x10,0x06,0x23,0xa0,0x04\n\t") /* %xmm8 */
1103 __ASM_CFI(".cfi_escape 0x10,0x1a,0x06,0x76,0x10,0x06,0x23,0xb0,0x04\n\t") /* %xmm9 */
1104 __ASM_CFI(".cfi_escape 0x10,0x1b,0x06,0x76,0x10,0x06,0x23,0xc0,0x04\n\t") /* %xmm10 */
1105 __ASM_CFI(".cfi_escape 0x10,0x1c,0x06,0x76,0x10,0x06,0x23,0xd0,0x04\n\t") /* %xmm11 */
1106 __ASM_CFI(".cfi_escape 0x10,0x1d,0x06,0x76,0x10,0x06,0x23,0xe0,0x04\n\t") /* %xmm12 */
1107 __ASM_CFI(".cfi_escape 0x10,0x1e,0x06,0x76,0x10,0x06,0x23,0xf0,0x04\n\t") /* %xmm13 */
1108 __ASM_CFI(".cfi_escape 0x10,0x1f,0x06,0x76,0x10,0x06,0x23,0x80,0x05\n\t") /* %xmm14 */
1109 __ASM_CFI(".cfi_escape 0x10,0x20,0x06,0x76,0x10,0x06,0x23,0x90,0x05\n\t") /* %xmm15 */
1110
1111 /* Setup SEH unwind registers restore. */
1112 "movq 0xa0(%rcx),%rax\n\t" /* context->Rbp */
1113 "movq %rax,0x100(%rsp)\n\t"
1114 __ASM_SEH(".seh_savereg %rbp, 0x100\n\t")
1115 "movq 0x90(%rcx),%rax\n\t" /* context->Rbx */
1116 "movq %rax,0x20(%rsp)\n\t"
1117 __ASM_SEH(".seh_savereg %rbx, 0x20\n\t")
1118 "movq 0xa8(%rcx),%rax\n\t" /* context->Rsi */
1119 "movq %rax,0x28(%rsp)\n\t"
1120 __ASM_SEH(".seh_savereg %rsi, 0x28\n\t")
1121 "movq 0xb0(%rcx),%rax\n\t" /* context->Rdi */
1122 "movq %rax,0x30(%rsp)\n\t"
1123 __ASM_SEH(".seh_savereg %rdi, 0x30\n\t")
1124
1125 "movq 0xd8(%rcx),%rax\n\t" /* context->R12 */
1126 "movq %rax,0x38(%rsp)\n\t"
1127 __ASM_SEH(".seh_savereg %r12, 0x38\n\t")
1128 "movq 0xe0(%rcx),%rax\n\t" /* context->R13 */
1129 "movq %rax,0x40(%rsp)\n\t"
1130 __ASM_SEH(".seh_savereg %r13, 0x40\n\t")
1131 "movq 0xe8(%rcx),%rax\n\t" /* context->R14 */
1132 "movq %rax,0x48(%rsp)\n\t"
1133 __ASM_SEH(".seh_savereg %r14, 0x48\n\t")
1134 "movq 0xf0(%rcx),%rax\n\t" /* context->R15 */
1135 "movq %rax,0x50(%rsp)\n\t"
1136 __ASM_SEH(".seh_savereg %r15, 0x50\n\t")
1137 "pushq %rsi\n\t"
1138 "pushq %rdi\n\t"
1139 "leaq 0x200(%rcx),%rsi\n\t"
1140 "leaq 0x70(%rsp),%rdi\n\t"
1141 "movq $0x14,%rcx\n\t"
1142 "cld\n\t"
1143 "rep; movsq\n\t"
1144 "popq %rdi\n\t"
1145 "popq %rsi\n\t"
1146 __ASM_SEH(".seh_savexmm %xmm6, 0x60\n\t")
1147 __ASM_SEH(".seh_savexmm %xmm7, 0x70\n\t")
1148 __ASM_SEH(".seh_savexmm %xmm8, 0x80\n\t")
1149 __ASM_SEH(".seh_savexmm %xmm9, 0x90\n\t")
1150 __ASM_SEH(".seh_savexmm %xmm10, 0xa0\n\t")
1151 __ASM_SEH(".seh_savexmm %xmm11, 0xb0\n\t")
1152 __ASM_SEH(".seh_savexmm %xmm12, 0xc0\n\t")
1153 __ASM_SEH(".seh_savexmm %xmm13, 0xd0\n\t")
1154 __ASM_SEH(".seh_savexmm %xmm14, 0xe0\n\t")
1155 __ASM_SEH(".seh_savexmm %xmm15, 0xf0\n\t")
1156
1157 /* call the callback. */
1158 "movq %r8,%rcx\n\t"
1159 "callq *%rdx\n\t"
1160 __ASM_CFI(".cfi_restore_state\n\t")
1161 "nop\n\t" /* Otherwise RtlVirtualUnwind() will think we are inside epilogue and
1162 * interpret / execute the rest of opcodes here instead of unwind through
1163 * machine frame. */
1164 "leaq 0(%rbp),%rsp\n\t"
1165 __ASM_CFI(".cfi_def_cfa_register %rsp\n\t")
1166 "popq %rbp\n\t"
1167 __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
1168 __ASM_CFI(".cfi_same_value %rbp\n\t")
1169 "ret")
1170
1171 /*******************************************************************
1172 * RtlRestoreContext (NTDLL.@)
1173 */
1174 void CDECL RtlRestoreContext( CONTEXT *context, EXCEPTION_RECORD *rec )
1175 {
1176 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
1177
1178 if (rec && rec->ExceptionCode == STATUS_LONGJUMP && rec->NumberParameters >= 1)
1179 {
1180 struct MSVCRT_JUMP_BUFFER *jmp = (struct MSVCRT_JUMP_BUFFER *)rec->ExceptionInformation[0];
1181 context->Rbx = jmp->Rbx;
1182 context->Rsp = jmp->Rsp;
1183 context->Rbp = jmp->Rbp;
1184 context->Rsi = jmp->Rsi;
1185 context->Rdi = jmp->Rdi;
1186 context->R12 = jmp->R12;
1187 context->R13 = jmp->R13;
1188 context->R14 = jmp->R14;
1189 context->R15 = jmp->R15;
1190 context->Rip = jmp->Rip;
1191 context->u.s.Xmm6 = jmp->Xmm6;
1192 context->u.s.Xmm7 = jmp->Xmm7;
1193 context->u.s.Xmm8 = jmp->Xmm8;
1194 context->u.s.Xmm9 = jmp->Xmm9;
1195 context->u.s.Xmm10 = jmp->Xmm10;
1196 context->u.s.Xmm11 = jmp->Xmm11;
1197 context->u.s.Xmm12 = jmp->Xmm12;
1198 context->u.s.Xmm13 = jmp->Xmm13;
1199 context->u.s.Xmm14 = jmp->Xmm14;
1200 context->u.s.Xmm15 = jmp->Xmm15;
1201 }
1202 else if (rec && rec->ExceptionCode == STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters >= 1)
1203 {
1204 PVOID (CALLBACK *consolidate)(EXCEPTION_RECORD *) = (void *)rec->ExceptionInformation[0];
1205 TRACE( "calling consolidate callback %p (rec=%p)\n", consolidate, rec );
1206 context->Rip = (ULONG64)call_consolidate_callback( context, consolidate, rec );
1207 }
1208
1209 /* hack: remove no longer accessible TEB frames */
1210 while ((ULONG64)teb_frame < context->Rsp)
1211 {
1212 TRACE( "removing TEB frame: %p\n", teb_frame );
1213 teb_frame = __wine_pop_frame( teb_frame );
1214 }
1215
1216 TRACE( "returning to %p stack %p\n", (void *)context->Rip, (void *)context->Rsp );
1217 NtContinue( context, FALSE );
1218 }
1219
1220
1221 /*******************************************************************
1222 * RtlUnwindEx (NTDLL.@)
1223 */
1224 void WINAPI RtlUnwindEx( PVOID end_frame, PVOID target_ip, EXCEPTION_RECORD *rec,
1225 PVOID retval, CONTEXT *context, UNWIND_HISTORY_TABLE *table )
1226 {
1227 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
1228 EXCEPTION_RECORD record;
1229 DISPATCHER_CONTEXT dispatch;
1230 CONTEXT new_context;
1231 NTSTATUS status;
1232 DWORD i;
1233
1234 RtlCaptureContext( context );
1235 new_context = *context;
1236
1237 /* build an exception record, if we do not have one */
1238 if (!rec)
1239 {
1240 record.ExceptionCode = STATUS_UNWIND;
1241 record.ExceptionFlags = 0;
1242 record.ExceptionRecord = NULL;
1243 record.ExceptionAddress = (void *)context->Rip;
1244 record.NumberParameters = 0;
1245 rec = &record;
1246 }
1247
1248 rec->ExceptionFlags |= EH_UNWINDING | (end_frame ? 0 : EH_EXIT_UNWIND);
1249
1250 TRACE( "code=%x flags=%x end_frame=%p target_ip=%p rip=%016lx\n",
1251 rec->ExceptionCode, rec->ExceptionFlags, end_frame, target_ip, context->Rip );
1252 for (i = 0; i < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); i++)
1253 TRACE( " info[%d]=%016lx\n", i, rec->ExceptionInformation[i] );
1254 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
1255 context->Rax, context->Rbx, context->Rcx, context->Rdx );
1256 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
1257 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
1258 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
1259 context->R8, context->R9, context->R10, context->R11 );
1260 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
1261 context->R12, context->R13, context->R14, context->R15 );
1262
1263 dispatch.EstablisherFrame = context->Rsp;
1264 dispatch.TargetIp = (ULONG64)target_ip;
1265 dispatch.ContextRecord = context;
1266 dispatch.HistoryTable = table;
1267
1268 for (;;)
1269 {
1270 status = virtual_unwind( UNW_FLAG_UHANDLER, &dispatch, &new_context );
1271 if (status != STATUS_SUCCESS) raise_status( status, rec );
1272
1273 unwind_done:
1274 if (!dispatch.EstablisherFrame) break;
1275
1276 if ((dispatch.EstablisherFrame & 7) ||
1277 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
1278 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
1279 {
1280 ERR( "invalid frame %p (%p-%p)\n", (void *)dispatch.EstablisherFrame,
1281 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1282 rec->ExceptionFlags |= EH_STACK_INVALID;
1283 break;
1284 }
1285
1286 if (dispatch.LanguageHandler)
1287 {
1288 if (end_frame && (dispatch.EstablisherFrame > (ULONG64)end_frame))
1289 {
1290 ERR( "invalid end frame %p/%p\n", (void *)dispatch.EstablisherFrame, end_frame );
1291 raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
1292 }
1293 if (dispatch.EstablisherFrame == (ULONG64)end_frame) rec->ExceptionFlags |= EH_TARGET_UNWIND;
1294 if (call_unwind_handler( rec, &dispatch ) == ExceptionCollidedUnwind)
1295 {
1296 ULONG64 frame;
1297
1298 new_context = *dispatch.ContextRecord;
1299 new_context.ContextFlags &= ~0x40;
1300 *context = new_context;
1301 dispatch.ContextRecord = context;
1302 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
1303 dispatch.ControlPc, dispatch.FunctionEntry,
1304 &new_context, NULL, &frame, NULL );
1305 rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
1306 goto unwind_done;
1307 }
1308 rec->ExceptionFlags &= ~EH_COLLIDED_UNWIND;
1309 }
1310 else /* hack: call builtin handlers registered in the tib list */
1311 {
1312 DWORD64 backup_frame = dispatch.EstablisherFrame;
1313 while ((ULONG64)teb_frame < new_context.Rsp && (ULONG64)teb_frame < (ULONG64)end_frame)
1314 {
1315 TRACE( "found builtin frame %p handler %p\n", teb_frame, teb_frame->Handler );
1316 dispatch.EstablisherFrame = (ULONG64)teb_frame;
1317 if (call_teb_unwind_handler( rec, &dispatch, teb_frame ) == ExceptionCollidedUnwind)
1318 {
1319 ULONG64 frame;
1320
1321 teb_frame = __wine_pop_frame( teb_frame );
1322
1323 new_context = *dispatch.ContextRecord;
1324 new_context.ContextFlags &= ~0x40;
1325 *context = new_context;
1326 dispatch.ContextRecord = context;
1327 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
1328 dispatch.ControlPc, dispatch.FunctionEntry,
1329 &new_context, NULL, &frame, NULL );
1330 rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
1331 goto unwind_done;
1332 }
1333 teb_frame = __wine_pop_frame( teb_frame );
1334 }
1335 if ((ULONG64)teb_frame == (ULONG64)end_frame && (ULONG64)end_frame < new_context.Rsp) break;
1336 dispatch.EstablisherFrame = backup_frame;
1337 }
1338
1339 if (dispatch.EstablisherFrame == (ULONG64)end_frame) break;
1340 *context = new_context;
1341 }
1342
1343 context->Rax = (ULONG64)retval;
1344 context->Rip = (ULONG64)target_ip;
1345 RtlRestoreContext(context, rec);
1346 }
1347
1348
1349 /*******************************************************************
1350 * RtlUnwind (NTDLL.@)
1351 */
1352 void WINAPI RtlUnwind( void *frame, void *target_ip, EXCEPTION_RECORD *rec, void *retval )
1353 {
1354 CONTEXT context;
1355 RtlUnwindEx( frame, target_ip, rec, retval, &context, NULL );
1356 }
1357
1358
1359 /*******************************************************************
1360 * _local_unwind (NTDLL.@)
1361 */
1362 void WINAPI _local_unwind( void *frame, void *target_ip )
1363 {
1364 CONTEXT context;
1365 RtlUnwindEx( frame, target_ip, NULL, NULL, &context, NULL );
1366 }
1367
1368 /*******************************************************************
1369 * __C_specific_handler (NTDLL.@)
1370 */
1371 EXCEPTION_DISPOSITION WINAPI __C_specific_handler( EXCEPTION_RECORD *rec,
1372 void *frame,
1373 CONTEXT *context,
1374 struct _DISPATCHER_CONTEXT *dispatch )
1375 {
1376 SCOPE_TABLE *table = dispatch->HandlerData;
1377 ULONG i;
1378
1379 TRACE( "%p %p %p %p\n", rec, frame, context, dispatch );
1380 if (TRACE_ON(seh)) dump_scope_table( dispatch->ImageBase, table );
1381
1382 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
1383 {
1384 for (i = dispatch->ScopeIndex; i < table->Count; i++)
1385 {
1386 if (dispatch->ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
1387 dispatch->ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
1388 {
1389 PTERMINATION_HANDLER handler;
1390
1391 if (table->ScopeRecord[i].JumpTarget) continue;
1392
1393 if (rec->ExceptionFlags & EH_TARGET_UNWIND &&
1394 dispatch->TargetIp >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
1395 dispatch->TargetIp < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
1396 {
1397 break;
1398 }
1399
1400 handler = (PTERMINATION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
1401 dispatch->ScopeIndex = i+1;
1402
1403 TRACE( "calling __finally %p frame %p\n", handler, frame );
1404 handler( TRUE, frame );
1405 }
1406 }
1407 return ExceptionContinueSearch;
1408 }
1409
1410 for (i = dispatch->ScopeIndex; i < table->Count; i++)
1411 {
1412 if (dispatch->ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
1413 dispatch->ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
1414 {
1415 if (!table->ScopeRecord[i].JumpTarget) continue;
1416 if (table->ScopeRecord[i].HandlerAddress != EXCEPTION_EXECUTE_HANDLER)
1417 {
1418 EXCEPTION_POINTERS ptrs;
1419 PEXCEPTION_FILTER filter;
1420
1421 filter = (PEXCEPTION_FILTER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
1422 ptrs.ExceptionRecord = rec;
1423 ptrs.ContextRecord = context;
1424 TRACE( "calling filter %p ptrs %p frame %p\n", filter, &ptrs, frame );
1425 switch (filter( &ptrs, frame ))
1426 {
1427 case EXCEPTION_EXECUTE_HANDLER:
1428 break;
1429 case EXCEPTION_CONTINUE_SEARCH:
1430 continue;
1431 case EXCEPTION_CONTINUE_EXECUTION:
1432 return ExceptionContinueExecution;
1433 }
1434 }
1435 TRACE( "unwinding to target %p\n", (char *)dispatch->ImageBase + table->ScopeRecord[i].JumpTarget );
1436 RtlUnwindEx( frame, (char *)dispatch->ImageBase + table->ScopeRecord[i].JumpTarget,
1437 rec, 0, dispatch->ContextRecord, dispatch->HistoryTable );
1438 }
1439 }
1440 return ExceptionContinueSearch;
1441 }
1442
1443
1444 /***********************************************************************
1445 * RtlRaiseException (NTDLL.@)
1446 */
1447 __ASM_GLOBAL_FUNC( RtlRaiseException,
1448 "sub $0x4f8,%rsp\n\t"
1449 __ASM_SEH(".seh_stackalloc 0x4f8\n\t")
1450 __ASM_SEH(".seh_endprologue\n\t")
1451 __ASM_CFI(".cfi_adjust_cfa_offset 0x4f8\n\t")
1452 "movq %rcx,0x500(%rsp)\n\t"
1453 "leaq 0x20(%rsp),%rcx\n\t"
1454 "call " __ASM_NAME("RtlCaptureContext") "\n\t"
1455 "leaq 0x20(%rsp),%rdx\n\t" /* context pointer */
1456 "leaq 0x500(%rsp),%rax\n\t" /* orig stack pointer */
1457 "movq %rax,0x98(%rdx)\n\t" /* context->Rsp */
1458 "movq (%rax),%rcx\n\t" /* original first parameter */
1459 "movq %rcx,0x80(%rdx)\n\t" /* context->Rcx */
1460 "movq 0x4f8(%rsp),%rax\n\t" /* return address */
1461 "movq %rax,0xf8(%rdx)\n\t" /* context->Rip */
1462 "movq %rax,0x10(%rcx)\n\t" /* rec->ExceptionAddress */
1463 "movl $1,%r8d\n\t"
1464 "movq %gs:(0x30),%rax\n\t" /* Teb */
1465 "movq 0x60(%rax),%rax\n\t" /* Peb */
1466 "cmpb $0,0x02(%rax)\n\t" /* BeingDebugged */
1467 "jne 1f\n\t"
1468 "call " __ASM_NAME("dispatch_exception") "\n"
1469 "1:\tcall " __ASM_NAME("NtRaiseException") "\n\t"
1470 "movq %rax,%rcx\n\t"
1471 "call " __ASM_NAME("RtlRaiseStatus") /* does not return */ );
1472
1473
1474 static inline ULONG hash_pointers( void **ptrs, ULONG count )
1475 {
1476 /* Based on MurmurHash2, which is in the public domain */
1477 static const ULONG m = 0x5bd1e995;
1478 static const ULONG r = 24;
1479 ULONG hash = count * sizeof(void*);
1480 for (; count > 0; ptrs++, count--)
1481 {
1482 ULONG_PTR data = (ULONG_PTR)*ptrs;
1483 ULONG k1 = (ULONG)(data & 0xffffffff), k2 = (ULONG)(data >> 32);
1484 k1 *= m;
1485 k1 = (k1 ^ (k1 >> r)) * m;
1486 k2 *= m;
1487 k2 = (k2 ^ (k2 >> r)) * m;
1488 hash = (((hash * m) ^ k1) * m) ^ k2;
1489 }
1490 hash = (hash ^ (hash >> 13)) * m;
1491 return hash ^ (hash >> 15);
1492 }
1493
1494
1495 /*************************************************************************
1496 * RtlCaptureStackBackTrace (NTDLL.@)
1497 */
1498 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
1499 {
1500 UNWIND_HISTORY_TABLE table;
1501 DISPATCHER_CONTEXT dispatch;
1502 CONTEXT context;
1503 NTSTATUS status;
1504 ULONG i;
1505 USHORT num_entries = 0;
1506
1507 TRACE( "(%u, %u, %p, %p)\n", skip, count, buffer, hash );
1508
1509 RtlCaptureContext( &context );
1510 dispatch.TargetIp = 0;
1511 dispatch.ContextRecord = &context;
1512 dispatch.HistoryTable = &table;
1513 if (hash) *hash = 0;
1514 for (i = 0; i < skip + count; i++)
1515 {
1516 status = virtual_unwind( UNW_FLAG_NHANDLER, &dispatch, &context );
1517 if (status != STATUS_SUCCESS) return i;
1518
1519 if (!dispatch.EstablisherFrame) break;
1520
1521 if ((dispatch.EstablisherFrame & 7) ||
1522 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
1523 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
1524 {
1525 ERR( "invalid frame %p (%p-%p)\n", (void *)dispatch.EstablisherFrame,
1526 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1527 break;
1528 }
1529
1530 if (context.Rsp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break;
1531
1532 if (i >= skip) buffer[num_entries++] = (void *)context.Rip;
1533 }
1534 if (hash && num_entries > 0) *hash = hash_pointers( buffer, num_entries );
1535 TRACE( "captured %hu frames\n", num_entries );
1536 return num_entries;
1537 }
1538
1539
1540 /***********************************************************************
1541 * signal_start_thread
1542 */
1543 __ASM_GLOBAL_FUNC( signal_start_thread,
1544 "movq %rcx,%rbx\n\t" /* context */
1545 /* clear the thread stack */
1546 "andq $~0xfff,%rcx\n\t" /* round down to page size */
1547 "movq %gs:0x30,%rax\n\t"
1548 "movq 0x10(%rax),%rdi\n\t" /* NtCurrentTeb()->Tib.StackLimit */
1549 "addq $0x2000,%rdi\n\t"
1550 "movq %rdi,%rsp\n\t"
1551 "subq %rdi,%rcx\n\t"
1552 "xorl %eax,%eax\n\t"
1553 "shrq $3,%rcx\n\t"
1554 "rep; stosq\n\t"
1555 /* switch to the initial context */
1556 "leaq -32(%rbx),%rsp\n\t"
1557 "movq %rbx,%rcx\n\t"
1558 "movl $1,%edx\n\t"
1559 "call " __ASM_NAME("NtContinue") )
1560
1561
1562 /**********************************************************************
1563 * DbgBreakPoint (NTDLL.@)
1564 */
1565 __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret"
1566 "\n\tnop; nop; nop; nop; nop; nop; nop; nop"
1567 "\n\tnop; nop; nop; nop; nop; nop" );
1568
1569 /**********************************************************************
1570 * DbgUserBreakPoint (NTDLL.@)
1571 */
1572 __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret"
1573 "\n\tnop; nop; nop; nop; nop; nop; nop; nop"
1574 "\n\tnop; nop; nop; nop; nop; nop" );
1575
1576 #endif /* __x86_64__ */
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