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user32: Support forcing the DPI awareness through the image file execution options.
[wine.git] / dlls / ntdll / signal_x86_64.c
blob952b1a439543654743b883e9a5d478cf7a8a10e2
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 "config.h"
24 #include "wine/port.h"
25
26 #include <assert.h>
27 #include <signal.h>
28 #include <stdlib.h>
29 #include <stdarg.h>
30 #include <stdio.h>
31 #include <sys/types.h>
32 #ifdef HAVE_UNISTD_H
33 # include <unistd.h>
34 #endif
35 #ifdef HAVE_MACHINE_SYSARCH_H
36 # include <machine/sysarch.h>
37 #endif
38 #ifdef HAVE_SYS_PARAM_H
39 # include <sys/param.h>
40 #endif
41 #ifdef HAVE_SYSCALL_H
42 # include <syscall.h>
43 #else
44 # ifdef HAVE_SYS_SYSCALL_H
45 # include <sys/syscall.h>
46 # endif
47 #endif
48 #ifdef HAVE_SYS_SIGNAL_H
49 # include <sys/signal.h>
50 #endif
51 #ifdef HAVE_SYS_UCONTEXT_H
52 # include <sys/ucontext.h>
53 #endif
54 #ifdef HAVE_LIBUNWIND_H
55 # define UNW_LOCAL_ONLY
56 # include <libunwind.h>
57 #endif
58
59 #define NONAMELESSUNION
60 #define NONAMELESSSTRUCT
61 #include "ntstatus.h"
62 #define WIN32_NO_STATUS
63 #include "windef.h"
64 #include "winternl.h"
65 #include "wine/library.h"
66 #include "wine/exception.h"
67 #include "wine/list.h"
68 #include "ntdll_misc.h"
69 #include "wine/debug.h"
70
71 #ifdef HAVE_VALGRIND_MEMCHECK_H
72 #include <valgrind/memcheck.h>
73 #endif
74
75 WINE_DEFAULT_DEBUG_CHANNEL(seh);
76 WINE_DECLARE_DEBUG_CHANNEL(relay);
77
78 struct _DISPATCHER_CONTEXT;
79
80 typedef LONG (WINAPI *PC_LANGUAGE_EXCEPTION_HANDLER)( EXCEPTION_POINTERS *ptrs, ULONG64 frame );
81 typedef EXCEPTION_DISPOSITION (WINAPI *PEXCEPTION_ROUTINE)( EXCEPTION_RECORD *rec,
82 ULONG64 frame,
83 CONTEXT *context,
84 struct _DISPATCHER_CONTEXT *dispatch );
85 typedef void (WINAPI *TERMINATION_HANDLER)( ULONG flags, ULONG64 frame );
86
87 typedef struct _DISPATCHER_CONTEXT
88 {
89 ULONG64 ControlPc;
90 ULONG64 ImageBase;
91 PRUNTIME_FUNCTION FunctionEntry;
92 ULONG64 EstablisherFrame;
93 ULONG64 TargetIp;
94 PCONTEXT ContextRecord;
95 PEXCEPTION_ROUTINE LanguageHandler;
96 PVOID HandlerData;
97 PUNWIND_HISTORY_TABLE HistoryTable;
98 ULONG ScopeIndex;
99 } DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT;
100
101 typedef struct _SCOPE_TABLE
102 {
103 ULONG Count;
104 struct
105 {
106 ULONG BeginAddress;
107 ULONG EndAddress;
108 ULONG HandlerAddress;
109 ULONG JumpTarget;
110 } ScopeRecord[1];
111 } SCOPE_TABLE, *PSCOPE_TABLE;
112
113
114 /* layering violation: the setjmp buffer is defined in msvcrt, but used by RtlUnwindEx */
115 struct MSVCRT_JUMP_BUFFER
116 {
117 ULONG64 Frame;
118 ULONG64 Rbx;
119 ULONG64 Rsp;
120 ULONG64 Rbp;
121 ULONG64 Rsi;
122 ULONG64 Rdi;
123 ULONG64 R12;
124 ULONG64 R13;
125 ULONG64 R14;
126 ULONG64 R15;
127 ULONG64 Rip;
128 ULONG64 Spare;
129 M128A Xmm6;
130 M128A Xmm7;
131 M128A Xmm8;
132 M128A Xmm9;
133 M128A Xmm10;
134 M128A Xmm11;
135 M128A Xmm12;
136 M128A Xmm13;
137 M128A Xmm14;
138 M128A Xmm15;
139 };
140
141 /***********************************************************************
142 * signal context platform-specific definitions
143 */
144 #ifdef linux
145
146 #include <asm/prctl.h>
147 static inline int arch_prctl( int func, void *ptr ) { return syscall( __NR_arch_prctl, func, ptr ); }
148
149 #define RAX_sig(context) ((context)->uc_mcontext.gregs[REG_RAX])
150 #define RBX_sig(context) ((context)->uc_mcontext.gregs[REG_RBX])
151 #define RCX_sig(context) ((context)->uc_mcontext.gregs[REG_RCX])
152 #define RDX_sig(context) ((context)->uc_mcontext.gregs[REG_RDX])
153 #define RSI_sig(context) ((context)->uc_mcontext.gregs[REG_RSI])
154 #define RDI_sig(context) ((context)->uc_mcontext.gregs[REG_RDI])
155 #define RBP_sig(context) ((context)->uc_mcontext.gregs[REG_RBP])
156 #define R8_sig(context) ((context)->uc_mcontext.gregs[REG_R8])
157 #define R9_sig(context) ((context)->uc_mcontext.gregs[REG_R9])
158 #define R10_sig(context) ((context)->uc_mcontext.gregs[REG_R10])
159 #define R11_sig(context) ((context)->uc_mcontext.gregs[REG_R11])
160 #define R12_sig(context) ((context)->uc_mcontext.gregs[REG_R12])
161 #define R13_sig(context) ((context)->uc_mcontext.gregs[REG_R13])
162 #define R14_sig(context) ((context)->uc_mcontext.gregs[REG_R14])
163 #define R15_sig(context) ((context)->uc_mcontext.gregs[REG_R15])
164
165 #define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0))
166 #define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1))
167 #define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2))
168
169 #define RSP_sig(context) ((context)->uc_mcontext.gregs[REG_RSP])
170 #define RIP_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
171 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
172 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
173 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
174
175 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.fpregs))
176
177 #elif defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
178
179 #define RAX_sig(context) ((context)->uc_mcontext.mc_rax)
180 #define RBX_sig(context) ((context)->uc_mcontext.mc_rbx)
181 #define RCX_sig(context) ((context)->uc_mcontext.mc_rcx)
182 #define RDX_sig(context) ((context)->uc_mcontext.mc_rdx)
183 #define RSI_sig(context) ((context)->uc_mcontext.mc_rsi)
184 #define RDI_sig(context) ((context)->uc_mcontext.mc_rdi)
185 #define RBP_sig(context) ((context)->uc_mcontext.mc_rbp)
186 #define R8_sig(context) ((context)->uc_mcontext.mc_r8)
187 #define R9_sig(context) ((context)->uc_mcontext.mc_r9)
188 #define R10_sig(context) ((context)->uc_mcontext.mc_r10)
189 #define R11_sig(context) ((context)->uc_mcontext.mc_r11)
190 #define R12_sig(context) ((context)->uc_mcontext.mc_r12)
191 #define R13_sig(context) ((context)->uc_mcontext.mc_r13)
192 #define R14_sig(context) ((context)->uc_mcontext.mc_r14)
193 #define R15_sig(context) ((context)->uc_mcontext.mc_r15)
194
195 #define CS_sig(context) ((context)->uc_mcontext.mc_cs)
196 #define DS_sig(context) ((context)->uc_mcontext.mc_ds)
197 #define ES_sig(context) ((context)->uc_mcontext.mc_es)
198 #define FS_sig(context) ((context)->uc_mcontext.mc_fs)
199 #define GS_sig(context) ((context)->uc_mcontext.mc_gs)
200 #define SS_sig(context) ((context)->uc_mcontext.mc_ss)
201
202 #define EFL_sig(context) ((context)->uc_mcontext.mc_rflags)
203
204 #define RIP_sig(context) ((context)->uc_mcontext.mc_rip)
205 #define RSP_sig(context) ((context)->uc_mcontext.mc_rsp)
206 #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
207 #define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
208
209 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.mc_fpstate))
210
211 #elif defined(__NetBSD__)
212
213 #define RAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RAX])
214 #define RBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBX])
215 #define RCX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RCX])
216 #define RDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDX])
217 #define RSI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RSI])
218 #define RDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDI])
219 #define RBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBP])
220 #define R8_sig(context) ((context)->uc_mcontext.__gregs[_REG_R8])
221 #define R9_sig(context) ((context)->uc_mcontext.__gregs[_REG_R9])
222 #define R10_sig(context) ((context)->uc_mcontext.__gregs[_REG_R10])
223 #define R11_sig(context) ((context)->uc_mcontext.__gregs[_REG_R11])
224 #define R12_sig(context) ((context)->uc_mcontext.__gregs[_REG_R12])
225 #define R13_sig(context) ((context)->uc_mcontext.__gregs[_REG_R13])
226 #define R14_sig(context) ((context)->uc_mcontext.__gregs[_REG_R14])
227 #define R15_sig(context) ((context)->uc_mcontext.__gregs[_REG_R15])
228
229 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
230 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
231 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
232 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
233 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
234 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
235
236 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_RFL])
237
238 #define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_RIP]))
239 #define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_URSP]))
240
241 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
242 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
243
244 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.__fpregs))
245 #elif defined (__APPLE__)
246 #define RAX_sig(context) ((context)->uc_mcontext->__ss.__rax)
247 #define RBX_sig(context) ((context)->uc_mcontext->__ss.__rbx)
248 #define RCX_sig(context) ((context)->uc_mcontext->__ss.__rcx)
249 #define RDX_sig(context) ((context)->uc_mcontext->__ss.__rdx)
250 #define RSI_sig(context) ((context)->uc_mcontext->__ss.__rsi)
251 #define RDI_sig(context) ((context)->uc_mcontext->__ss.__rdi)
252 #define RBP_sig(context) ((context)->uc_mcontext->__ss.__rbp)
253 #define R8_sig(context) ((context)->uc_mcontext->__ss.__r8)
254 #define R9_sig(context) ((context)->uc_mcontext->__ss.__r9)
255 #define R10_sig(context) ((context)->uc_mcontext->__ss.__r10)
256 #define R11_sig(context) ((context)->uc_mcontext->__ss.__r11)
257 #define R12_sig(context) ((context)->uc_mcontext->__ss.__r12)
258 #define R13_sig(context) ((context)->uc_mcontext->__ss.__r13)
259 #define R14_sig(context) ((context)->uc_mcontext->__ss.__r14)
260 #define R15_sig(context) ((context)->uc_mcontext->__ss.__r15)
261
262 #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
263 #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
264 #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
265
266 #define EFL_sig(context) ((context)->uc_mcontext->__ss.__rflags)
267
268 #define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rip))
269 #define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rsp))
270
271 #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
272 #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
273
274 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
275
276 #else
277 #error You must define the signal context functions for your platform
278 #endif
279
280 enum i386_trap_code
281 {
282 TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
283 TRAP_x86_DIVIDE = 0, /* Division by zero exception */
284 TRAP_x86_TRCTRAP = 1, /* Single-step exception */
285 TRAP_x86_NMI = 2, /* NMI interrupt */
286 TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
287 TRAP_x86_OFLOW = 4, /* Overflow exception */
288 TRAP_x86_BOUND = 5, /* Bound range exception */
289 TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
290 TRAP_x86_DNA = 7, /* Device not available exception */
291 TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
292 TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
293 TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
294 TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
295 TRAP_x86_STKFLT = 12, /* Stack fault */
296 TRAP_x86_PROTFLT = 13, /* General protection fault */
297 TRAP_x86_PAGEFLT = 14, /* Page fault */
298 TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
299 TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
300 TRAP_x86_MCHK = 18, /* Machine check exception */
301 TRAP_x86_CACHEFLT = 19 /* Cache flush exception */
302 };
303
304 static const size_t teb_size = 0x2000; /* we reserve two pages for the TEB */
305 static size_t signal_stack_size;
306
307 typedef void (*raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
308 typedef int (*wine_signal_handler)(unsigned int sig);
309
310 static wine_signal_handler handlers[256];
311
312 struct amd64_thread_data
313 {
314 DWORD_PTR dr0; /* debug registers */
315 DWORD_PTR dr1;
316 DWORD_PTR dr2;
317 DWORD_PTR dr3;
318 DWORD_PTR dr6;
319 DWORD_PTR dr7;
320 void *exit_frame; /* exit frame pointer */
321 };
322
323 C_ASSERT( sizeof(struct amd64_thread_data) <= sizeof(((TEB *)0)->SystemReserved2) );
324 C_ASSERT( offsetof( TEB, SystemReserved2 ) + offsetof( struct amd64_thread_data, exit_frame ) == 0x330 );
325
326 static inline struct amd64_thread_data *amd64_thread_data(void)
327 {
328 return (struct amd64_thread_data *)NtCurrentTeb()->SystemReserved2;
329 }
330
331 /***********************************************************************
332 * Dynamic unwind table
333 */
334
335 struct dynamic_unwind_entry
336 {
337 struct list entry;
338
339 /* memory region which matches this entry */
340 DWORD64 base;
341 DWORD size;
342
343 /* lookup table */
344 RUNTIME_FUNCTION *table;
345 DWORD table_size;
346
347 /* user defined callback */
348 PGET_RUNTIME_FUNCTION_CALLBACK callback;
349 PVOID context;
350 };
351
352 static struct list dynamic_unwind_list = LIST_INIT(dynamic_unwind_list);
353
354 static RTL_CRITICAL_SECTION dynamic_unwind_section;
355 static RTL_CRITICAL_SECTION_DEBUG dynamic_unwind_debug =
356 {
357 0, 0, &dynamic_unwind_section,
358 { &dynamic_unwind_debug.ProcessLocksList, &dynamic_unwind_debug.ProcessLocksList },
359 0, 0, { (DWORD_PTR)(__FILE__ ": dynamic_unwind_section") }
360 };
361 static RTL_CRITICAL_SECTION dynamic_unwind_section = { &dynamic_unwind_debug, -1, 0, 0, 0, 0 };
362
363 /***********************************************************************
364 * Definitions for Win32 unwind tables
365 */
366
367 union handler_data
368 {
369 RUNTIME_FUNCTION chain;
370 ULONG handler;
371 };
372
373 struct opcode
374 {
375 BYTE offset;
376 BYTE code : 4;
377 BYTE info : 4;
378 };
379
380 struct UNWIND_INFO
381 {
382 BYTE version : 3;
383 BYTE flags : 5;
384 BYTE prolog;
385 BYTE count;
386 BYTE frame_reg : 4;
387 BYTE frame_offset : 4;
388 struct opcode opcodes[1]; /* info->count entries */
389 /* followed by handler_data */
390 };
391
392 #define UWOP_PUSH_NONVOL 0
393 #define UWOP_ALLOC_LARGE 1
394 #define UWOP_ALLOC_SMALL 2
395 #define UWOP_SET_FPREG 3
396 #define UWOP_SAVE_NONVOL 4
397 #define UWOP_SAVE_NONVOL_FAR 5
398 #define UWOP_SAVE_XMM128 8
399 #define UWOP_SAVE_XMM128_FAR 9
400 #define UWOP_PUSH_MACHFRAME 10
401
402 static void dump_unwind_info( ULONG64 base, RUNTIME_FUNCTION *function )
403 {
404 static const char * const reg_names[16] =
405 { "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
406 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" };
407
408 union handler_data *handler_data;
409 struct UNWIND_INFO *info;
410 unsigned int i, count;
411
412 TRACE( "**** func %x-%x\n", function->BeginAddress, function->EndAddress );
413 for (;;)
414 {
415 if (function->UnwindData & 1)
416 {
417 RUNTIME_FUNCTION *next = (RUNTIME_FUNCTION *)((char *)base + (function->UnwindData & ~1));
418 TRACE( "unwind info for function %p-%p chained to function %p-%p\n",
419 (char *)base + function->BeginAddress, (char *)base + function->EndAddress,
420 (char *)base + next->BeginAddress, (char *)base + next->EndAddress );
421 function = next;
422 continue;
423 }
424 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
425
426 TRACE( "unwind info at %p flags %x prolog 0x%x bytes function %p-%p\n",
427 info, info->flags, info->prolog,
428 (char *)base + function->BeginAddress, (char *)base + function->EndAddress );
429
430 if (info->frame_reg)
431 TRACE( " frame register %s offset 0x%x(%%rsp)\n",
432 reg_names[info->frame_reg], info->frame_offset * 16 );
433
434 for (i = 0; i < info->count; i++)
435 {
436 TRACE( " 0x%x: ", info->opcodes[i].offset );
437 switch (info->opcodes[i].code)
438 {
439 case UWOP_PUSH_NONVOL:
440 TRACE( "pushq %%%s\n", reg_names[info->opcodes[i].info] );
441 break;
442 case UWOP_ALLOC_LARGE:
443 if (info->opcodes[i].info)
444 {
445 count = *(DWORD *)&info->opcodes[i+1];
446 i += 2;
447 }
448 else
449 {
450 count = *(USHORT *)&info->opcodes[i+1] * 8;
451 i++;
452 }
453 TRACE( "subq $0x%x,%%rsp\n", count );
454 break;
455 case UWOP_ALLOC_SMALL:
456 count = (info->opcodes[i].info + 1) * 8;
457 TRACE( "subq $0x%x,%%rsp\n", count );
458 break;
459 case UWOP_SET_FPREG:
460 TRACE( "leaq 0x%x(%%rsp),%s\n",
461 info->frame_offset * 16, reg_names[info->frame_reg] );
462 break;
463 case UWOP_SAVE_NONVOL:
464 count = *(USHORT *)&info->opcodes[i+1] * 8;
465 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
466 i++;
467 break;
468 case UWOP_SAVE_NONVOL_FAR:
469 count = *(DWORD *)&info->opcodes[i+1];
470 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
471 i += 2;
472 break;
473 case UWOP_SAVE_XMM128:
474 count = *(USHORT *)&info->opcodes[i+1] * 16;
475 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
476 i++;
477 break;
478 case UWOP_SAVE_XMM128_FAR:
479 count = *(DWORD *)&info->opcodes[i+1];
480 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
481 i += 2;
482 break;
483 case UWOP_PUSH_MACHFRAME:
484 TRACE( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
485 break;
486 default:
487 FIXME( "unknown code %u\n", info->opcodes[i].code );
488 break;
489 }
490 }
491
492 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
493 if (info->flags & UNW_FLAG_CHAININFO)
494 {
495 TRACE( " chained to function %p-%p\n",
496 (char *)base + handler_data->chain.BeginAddress,
497 (char *)base + handler_data->chain.EndAddress );
498 function = &handler_data->chain;
499 continue;
500 }
501 if (info->flags & (UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER))
502 TRACE( " handler %p data at %p\n",
503 (char *)base + handler_data->handler, &handler_data->handler + 1 );
504 break;
505 }
506 }
507
508 static void dump_scope_table( ULONG64 base, const SCOPE_TABLE *table )
509 {
510 unsigned int i;
511
512 TRACE( "scope table at %p\n", table );
513 for (i = 0; i < table->Count; i++)
514 TRACE( " %u: %lx-%lx handler %lx target %lx\n", i,
515 base + table->ScopeRecord[i].BeginAddress,
516 base + table->ScopeRecord[i].EndAddress,
517 base + table->ScopeRecord[i].HandlerAddress,
518 base + table->ScopeRecord[i].JumpTarget );
519 }
520
521
522 /***********************************************************************
523 * Definitions for Dwarf unwind tables
524 */
525
526 enum dwarf_call_frame_info
527 {
528 DW_CFA_advance_loc = 0x40,
529 DW_CFA_offset = 0x80,
530 DW_CFA_restore = 0xc0,
531 DW_CFA_nop = 0x00,
532 DW_CFA_set_loc = 0x01,
533 DW_CFA_advance_loc1 = 0x02,
534 DW_CFA_advance_loc2 = 0x03,
535 DW_CFA_advance_loc4 = 0x04,
536 DW_CFA_offset_extended = 0x05,
537 DW_CFA_restore_extended = 0x06,
538 DW_CFA_undefined = 0x07,
539 DW_CFA_same_value = 0x08,
540 DW_CFA_register = 0x09,
541 DW_CFA_remember_state = 0x0a,
542 DW_CFA_restore_state = 0x0b,
543 DW_CFA_def_cfa = 0x0c,
544 DW_CFA_def_cfa_register = 0x0d,
545 DW_CFA_def_cfa_offset = 0x0e,
546 DW_CFA_def_cfa_expression = 0x0f,
547 DW_CFA_expression = 0x10,
548 DW_CFA_offset_extended_sf = 0x11,
549 DW_CFA_def_cfa_sf = 0x12,
550 DW_CFA_def_cfa_offset_sf = 0x13,
551 DW_CFA_val_offset = 0x14,
552 DW_CFA_val_offset_sf = 0x15,
553 DW_CFA_val_expression = 0x16,
554 };
555
556 enum dwarf_operation
557 {
558 DW_OP_addr = 0x03,
559 DW_OP_deref = 0x06,
560 DW_OP_const1u = 0x08,
561 DW_OP_const1s = 0x09,
562 DW_OP_const2u = 0x0a,
563 DW_OP_const2s = 0x0b,
564 DW_OP_const4u = 0x0c,
565 DW_OP_const4s = 0x0d,
566 DW_OP_const8u = 0x0e,
567 DW_OP_const8s = 0x0f,
568 DW_OP_constu = 0x10,
569 DW_OP_consts = 0x11,
570 DW_OP_dup = 0x12,
571 DW_OP_drop = 0x13,
572 DW_OP_over = 0x14,
573 DW_OP_pick = 0x15,
574 DW_OP_swap = 0x16,
575 DW_OP_rot = 0x17,
576 DW_OP_xderef = 0x18,
577 DW_OP_abs = 0x19,
578 DW_OP_and = 0x1a,
579 DW_OP_div = 0x1b,
580 DW_OP_minus = 0x1c,
581 DW_OP_mod = 0x1d,
582 DW_OP_mul = 0x1e,
583 DW_OP_neg = 0x1f,
584 DW_OP_not = 0x20,
585 DW_OP_or = 0x21,
586 DW_OP_plus = 0x22,
587 DW_OP_plus_uconst = 0x23,
588 DW_OP_shl = 0x24,
589 DW_OP_shr = 0x25,
590 DW_OP_shra = 0x26,
591 DW_OP_xor = 0x27,
592 DW_OP_bra = 0x28,
593 DW_OP_eq = 0x29,
594 DW_OP_ge = 0x2a,
595 DW_OP_gt = 0x2b,
596 DW_OP_le = 0x2c,
597 DW_OP_lt = 0x2d,
598 DW_OP_ne = 0x2e,
599 DW_OP_skip = 0x2f,
600 DW_OP_lit0 = 0x30,
601 DW_OP_lit1 = 0x31,
602 DW_OP_lit2 = 0x32,
603 DW_OP_lit3 = 0x33,
604 DW_OP_lit4 = 0x34,
605 DW_OP_lit5 = 0x35,
606 DW_OP_lit6 = 0x36,
607 DW_OP_lit7 = 0x37,
608 DW_OP_lit8 = 0x38,
609 DW_OP_lit9 = 0x39,
610 DW_OP_lit10 = 0x3a,
611 DW_OP_lit11 = 0x3b,
612 DW_OP_lit12 = 0x3c,
613 DW_OP_lit13 = 0x3d,
614 DW_OP_lit14 = 0x3e,
615 DW_OP_lit15 = 0x3f,
616 DW_OP_lit16 = 0x40,
617 DW_OP_lit17 = 0x41,
618 DW_OP_lit18 = 0x42,
619 DW_OP_lit19 = 0x43,
620 DW_OP_lit20 = 0x44,
621 DW_OP_lit21 = 0x45,
622 DW_OP_lit22 = 0x46,
623 DW_OP_lit23 = 0x47,
624 DW_OP_lit24 = 0x48,
625 DW_OP_lit25 = 0x49,
626 DW_OP_lit26 = 0x4a,
627 DW_OP_lit27 = 0x4b,
628 DW_OP_lit28 = 0x4c,
629 DW_OP_lit29 = 0x4d,
630 DW_OP_lit30 = 0x4e,
631 DW_OP_lit31 = 0x4f,
632 DW_OP_reg0 = 0x50,
633 DW_OP_reg1 = 0x51,
634 DW_OP_reg2 = 0x52,
635 DW_OP_reg3 = 0x53,
636 DW_OP_reg4 = 0x54,
637 DW_OP_reg5 = 0x55,
638 DW_OP_reg6 = 0x56,
639 DW_OP_reg7 = 0x57,
640 DW_OP_reg8 = 0x58,
641 DW_OP_reg9 = 0x59,
642 DW_OP_reg10 = 0x5a,
643 DW_OP_reg11 = 0x5b,
644 DW_OP_reg12 = 0x5c,
645 DW_OP_reg13 = 0x5d,
646 DW_OP_reg14 = 0x5e,
647 DW_OP_reg15 = 0x5f,
648 DW_OP_reg16 = 0x60,
649 DW_OP_reg17 = 0x61,
650 DW_OP_reg18 = 0x62,
651 DW_OP_reg19 = 0x63,
652 DW_OP_reg20 = 0x64,
653 DW_OP_reg21 = 0x65,
654 DW_OP_reg22 = 0x66,
655 DW_OP_reg23 = 0x67,
656 DW_OP_reg24 = 0x68,
657 DW_OP_reg25 = 0x69,
658 DW_OP_reg26 = 0x6a,
659 DW_OP_reg27 = 0x6b,
660 DW_OP_reg28 = 0x6c,
661 DW_OP_reg29 = 0x6d,
662 DW_OP_reg30 = 0x6e,
663 DW_OP_reg31 = 0x6f,
664 DW_OP_breg0 = 0x70,
665 DW_OP_breg1 = 0x71,
666 DW_OP_breg2 = 0x72,
667 DW_OP_breg3 = 0x73,
668 DW_OP_breg4 = 0x74,
669 DW_OP_breg5 = 0x75,
670 DW_OP_breg6 = 0x76,
671 DW_OP_breg7 = 0x77,
672 DW_OP_breg8 = 0x78,
673 DW_OP_breg9 = 0x79,
674 DW_OP_breg10 = 0x7a,
675 DW_OP_breg11 = 0x7b,
676 DW_OP_breg12 = 0x7c,
677 DW_OP_breg13 = 0x7d,
678 DW_OP_breg14 = 0x7e,
679 DW_OP_breg15 = 0x7f,
680 DW_OP_breg16 = 0x80,
681 DW_OP_breg17 = 0x81,
682 DW_OP_breg18 = 0x82,
683 DW_OP_breg19 = 0x83,
684 DW_OP_breg20 = 0x84,
685 DW_OP_breg21 = 0x85,
686 DW_OP_breg22 = 0x86,
687 DW_OP_breg23 = 0x87,
688 DW_OP_breg24 = 0x88,
689 DW_OP_breg25 = 0x89,
690 DW_OP_breg26 = 0x8a,
691 DW_OP_breg27 = 0x8b,
692 DW_OP_breg28 = 0x8c,
693 DW_OP_breg29 = 0x8d,
694 DW_OP_breg30 = 0x8e,
695 DW_OP_breg31 = 0x8f,
696 DW_OP_regx = 0x90,
697 DW_OP_fbreg = 0x91,
698 DW_OP_bregx = 0x92,
699 DW_OP_piece = 0x93,
700 DW_OP_deref_size = 0x94,
701 DW_OP_xderef_size = 0x95,
702 DW_OP_nop = 0x96,
703 DW_OP_push_object_address = 0x97,
704 DW_OP_call2 = 0x98,
705 DW_OP_call4 = 0x99,
706 DW_OP_call_ref = 0x9a,
707 DW_OP_form_tls_address = 0x9b,
708 DW_OP_call_frame_cfa = 0x9c,
709 DW_OP_bit_piece = 0x9d,
710 DW_OP_lo_user = 0xe0,
711 DW_OP_hi_user = 0xff,
712 DW_OP_GNU_push_tls_address = 0xe0,
713 DW_OP_GNU_uninit = 0xf0,
714 DW_OP_GNU_encoded_addr = 0xf1,
715 };
716
717 #define DW_EH_PE_native 0x00
718 #define DW_EH_PE_leb128 0x01
719 #define DW_EH_PE_data2 0x02
720 #define DW_EH_PE_data4 0x03
721 #define DW_EH_PE_data8 0x04
722 #define DW_EH_PE_signed 0x08
723 #define DW_EH_PE_abs 0x00
724 #define DW_EH_PE_pcrel 0x10
725 #define DW_EH_PE_textrel 0x20
726 #define DW_EH_PE_datarel 0x30
727 #define DW_EH_PE_funcrel 0x40
728 #define DW_EH_PE_aligned 0x50
729 #define DW_EH_PE_indirect 0x80
730 #define DW_EH_PE_omit 0xff
731
732 struct dwarf_eh_bases
733 {
734 void *tbase;
735 void *dbase;
736 void *func;
737 };
738
739 struct dwarf_cie
740 {
741 unsigned int length;
742 int id;
743 unsigned char version;
744 unsigned char augmentation[1];
745 };
746
747 struct dwarf_fde
748 {
749 unsigned int length;
750 unsigned int cie_offset;
751 };
752
753 extern const struct dwarf_fde *_Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
754
755 static unsigned char dwarf_get_u1( const unsigned char **p )
756 {
757 return *(*p)++;
758 }
759
760 static unsigned short dwarf_get_u2( const unsigned char **p )
761 {
762 unsigned int ret = (*p)[0] | ((*p)[1] << 8);
763 (*p) += 2;
764 return ret;
765 }
766
767 static unsigned int dwarf_get_u4( const unsigned char **p )
768 {
769 unsigned int ret = (*p)[0] | ((*p)[1] << 8) | ((*p)[2] << 16) | ((*p)[3] << 24);
770 (*p) += 4;
771 return ret;
772 }
773
774 static ULONG64 dwarf_get_u8( const unsigned char **p )
775 {
776 ULONG64 low = dwarf_get_u4( p );
777 ULONG64 high = dwarf_get_u4( p );
778 return low | (high << 32);
779 }
780
781 static ULONG_PTR dwarf_get_uleb128( const unsigned char **p )
782 {
783 ULONG_PTR ret = 0;
784 unsigned int shift = 0;
785 unsigned char byte;
786
787 do
788 {
789 byte = **p;
790 ret |= (ULONG_PTR)(byte & 0x7f) << shift;
791 shift += 7;
792 (*p)++;
793 } while (byte & 0x80);
794 return ret;
795 }
796
797 static LONG_PTR dwarf_get_sleb128( const unsigned char **p )
798 {
799 ULONG_PTR ret = 0;
800 unsigned int shift = 0;
801 unsigned char byte;
802
803 do
804 {
805 byte = **p;
806 ret |= (ULONG_PTR)(byte & 0x7f) << shift;
807 shift += 7;
808 (*p)++;
809 } while (byte & 0x80);
810
811 if ((shift < 8 * sizeof(ret)) && (byte & 0x40)) ret |= -((ULONG_PTR)1 << shift);
812 return ret;
813 }
814
815 static ULONG_PTR dwarf_get_ptr( const unsigned char **p, unsigned char encoding )
816 {
817 ULONG_PTR base;
818
819 if (encoding == DW_EH_PE_omit) return 0;
820
821 switch (encoding & 0xf0)
822 {
823 case DW_EH_PE_abs:
824 base = 0;
825 break;
826 case DW_EH_PE_pcrel:
827 base = (ULONG_PTR)*p;
828 break;
829 default:
830 FIXME( "unsupported encoding %02x\n", encoding );
831 return 0;
832 }
833
834 switch (encoding & 0x0f)
835 {
836 case DW_EH_PE_native:
837 return base + dwarf_get_u8( p );
838 case DW_EH_PE_leb128:
839 return base + dwarf_get_uleb128( p );
840 case DW_EH_PE_data2:
841 return base + dwarf_get_u2( p );
842 case DW_EH_PE_data4:
843 return base + dwarf_get_u4( p );
844 case DW_EH_PE_data8:
845 return base + dwarf_get_u8( p );
846 case DW_EH_PE_signed|DW_EH_PE_leb128:
847 return base + dwarf_get_sleb128( p );
848 case DW_EH_PE_signed|DW_EH_PE_data2:
849 return base + (signed short)dwarf_get_u2( p );
850 case DW_EH_PE_signed|DW_EH_PE_data4:
851 return base + (signed int)dwarf_get_u4( p );
852 case DW_EH_PE_signed|DW_EH_PE_data8:
853 return base + (LONG64)dwarf_get_u8( p );
854 default:
855 FIXME( "unsupported encoding %02x\n", encoding );
856 return 0;
857 }
858 }
859
860 enum reg_rule
861 {
862 RULE_UNSET, /* not set at all */
863 RULE_UNDEFINED, /* undefined value */
864 RULE_SAME, /* same value as previous frame */
865 RULE_CFA_OFFSET, /* stored at cfa offset */
866 RULE_OTHER_REG, /* stored in other register */
867 RULE_EXPRESSION, /* address specified by expression */
868 RULE_VAL_EXPRESSION /* value specified by expression */
869 };
870
871 #define NB_FRAME_REGS 41
872 #define MAX_SAVED_STATES 16
873
874 struct frame_state
875 {
876 ULONG_PTR cfa_offset;
877 unsigned char cfa_reg;
878 enum reg_rule cfa_rule;
879 enum reg_rule rules[NB_FRAME_REGS];
880 ULONG64 regs[NB_FRAME_REGS];
881 };
882
883 struct frame_info
884 {
885 ULONG_PTR ip;
886 ULONG_PTR code_align;
887 LONG_PTR data_align;
888 unsigned char retaddr_reg;
889 unsigned char fde_encoding;
890 unsigned char signal_frame;
891 unsigned char state_sp;
892 struct frame_state state;
893 struct frame_state *state_stack;
894 };
895
896 static const char *dwarf_reg_names[NB_FRAME_REGS] =
897 {
898 /* 0-7 */ "%rax", "%rdx", "%rcx", "%rbx", "%rsi", "%rdi", "%rbp", "%rsp",
899 /* 8-16 */ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%rip",
900 /* 17-24 */ "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7",
901 /* 25-32 */ "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15",
902 /* 33-40 */ "%st0", "%st1", "%st2", "%st3", "%st4", "%st5", "%st6", "%st7"
903 };
904
905 static BOOL valid_reg( ULONG_PTR reg )
906 {
907 if (reg >= NB_FRAME_REGS) FIXME( "unsupported reg %lx\n", reg );
908 return (reg < NB_FRAME_REGS);
909 }
910
911 static void execute_cfa_instructions( const unsigned char *ptr, const unsigned char *end,
912 ULONG_PTR last_ip, struct frame_info *info )
913 {
914 while (ptr < end && info->ip < last_ip + info->signal_frame)
915 {
916 enum dwarf_call_frame_info op = *ptr++;
917
918 if (op & 0xc0)
919 {
920 switch (op & 0xc0)
921 {
922 case DW_CFA_advance_loc:
923 {
924 ULONG_PTR offset = (op & 0x3f) * info->code_align;
925 TRACE( "%lx: DW_CFA_advance_loc %lu\n", info->ip, offset );
926 info->ip += offset;
927 break;
928 }
929 case DW_CFA_offset:
930 {
931 ULONG_PTR reg = op & 0x3f;
932 LONG_PTR offset = dwarf_get_uleb128( &ptr ) * info->data_align;
933 if (!valid_reg( reg )) break;
934 TRACE( "%lx: DW_CFA_offset %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
935 info->state.regs[reg] = offset;
936 info->state.rules[reg] = RULE_CFA_OFFSET;
937 break;
938 }
939 case DW_CFA_restore:
940 {
941 ULONG_PTR reg = op & 0x3f;
942 if (!valid_reg( reg )) break;
943 TRACE( "%lx: DW_CFA_restore %s\n", info->ip, dwarf_reg_names[reg] );
944 info->state.rules[reg] = RULE_UNSET;
945 break;
946 }
947 }
948 }
949 else switch (op)
950 {
951 case DW_CFA_nop:
952 break;
953 case DW_CFA_set_loc:
954 {
955 ULONG_PTR loc = dwarf_get_ptr( &ptr, info->fde_encoding );
956 TRACE( "%lx: DW_CFA_set_loc %lx\n", info->ip, loc );
957 info->ip = loc;
958 break;
959 }
960 case DW_CFA_advance_loc1:
961 {
962 ULONG_PTR offset = *ptr++ * info->code_align;
963 TRACE( "%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset );
964 info->ip += offset;
965 break;
966 }
967 case DW_CFA_advance_loc2:
968 {
969 ULONG_PTR offset = dwarf_get_u2( &ptr ) * info->code_align;
970 TRACE( "%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset );
971 info->ip += offset;
972 break;
973 }
974 case DW_CFA_advance_loc4:
975 {
976 ULONG_PTR offset = dwarf_get_u4( &ptr ) * info->code_align;
977 TRACE( "%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset );
978 info->ip += offset;
979 break;
980 }
981 case DW_CFA_offset_extended:
982 case DW_CFA_offset_extended_sf:
983 {
984 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
985 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf_get_uleb128( &ptr ) * info->data_align
986 : dwarf_get_sleb128( &ptr ) * info->data_align;
987 if (!valid_reg( reg )) break;
988 TRACE( "%lx: DW_CFA_offset_extended %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
989 info->state.regs[reg] = offset;
990 info->state.rules[reg] = RULE_CFA_OFFSET;
991 break;
992 }
993 case DW_CFA_restore_extended:
994 {
995 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
996 if (!valid_reg( reg )) break;
997 TRACE( "%lx: DW_CFA_restore_extended %s\n", info->ip, dwarf_reg_names[reg] );
998 info->state.rules[reg] = RULE_UNSET;
999 break;
1000 }
1001 case DW_CFA_undefined:
1002 {
1003 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1004 if (!valid_reg( reg )) break;
1005 TRACE( "%lx: DW_CFA_undefined %s\n", info->ip, dwarf_reg_names[reg] );
1006 info->state.rules[reg] = RULE_UNDEFINED;
1007 break;
1008 }
1009 case DW_CFA_same_value:
1010 {
1011 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1012 if (!valid_reg( reg )) break;
1013 TRACE( "%lx: DW_CFA_same_value %s\n", info->ip, dwarf_reg_names[reg] );
1014 info->state.regs[reg] = reg;
1015 info->state.rules[reg] = RULE_SAME;
1016 break;
1017 }
1018 case DW_CFA_register:
1019 {
1020 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1021 ULONG_PTR reg2 = dwarf_get_uleb128( &ptr );
1022 if (!valid_reg( reg ) || !valid_reg( reg2 )) break;
1023 TRACE( "%lx: DW_CFA_register %s == %s\n", info->ip, dwarf_reg_names[reg], dwarf_reg_names[reg2] );
1024 info->state.regs[reg] = reg2;
1025 info->state.rules[reg] = RULE_OTHER_REG;
1026 break;
1027 }
1028 case DW_CFA_remember_state:
1029 TRACE( "%lx: DW_CFA_remember_state\n", info->ip );
1030 if (info->state_sp >= MAX_SAVED_STATES)
1031 FIXME( "%lx: DW_CFA_remember_state too many nested saves\n", info->ip );
1032 else
1033 info->state_stack[info->state_sp++] = info->state;
1034 break;
1035 case DW_CFA_restore_state:
1036 TRACE( "%lx: DW_CFA_restore_state\n", info->ip );
1037 if (!info->state_sp)
1038 FIXME( "%lx: DW_CFA_restore_state without corresponding save\n", info->ip );
1039 else
1040 info->state = info->state_stack[--info->state_sp];
1041 break;
1042 case DW_CFA_def_cfa:
1043 case DW_CFA_def_cfa_sf:
1044 {
1045 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1046 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf_get_uleb128( &ptr )
1047 : dwarf_get_sleb128( &ptr ) * info->data_align;
1048 if (!valid_reg( reg )) break;
1049 TRACE( "%lx: DW_CFA_def_cfa %s, %lu\n", info->ip, dwarf_reg_names[reg], offset );
1050 info->state.cfa_reg = reg;
1051 info->state.cfa_offset = offset;
1052 info->state.cfa_rule = RULE_CFA_OFFSET;
1053 break;
1054 }
1055 case DW_CFA_def_cfa_register:
1056 {
1057 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1058 if (!valid_reg( reg )) break;
1059 TRACE( "%lx: DW_CFA_def_cfa_register %s\n", info->ip, dwarf_reg_names[reg] );
1060 info->state.cfa_reg = reg;
1061 info->state.cfa_rule = RULE_CFA_OFFSET;
1062 break;
1063 }
1064 case DW_CFA_def_cfa_offset:
1065 case DW_CFA_def_cfa_offset_sf:
1066 {
1067 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf_get_uleb128( &ptr )
1068 : dwarf_get_sleb128( &ptr ) * info->data_align;
1069 TRACE( "%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset );
1070 info->state.cfa_offset = offset;
1071 info->state.cfa_rule = RULE_CFA_OFFSET;
1072 break;
1073 }
1074 case DW_CFA_def_cfa_expression:
1075 {
1076 ULONG_PTR expr = (ULONG_PTR)ptr;
1077 ULONG_PTR len = dwarf_get_uleb128( &ptr );
1078 TRACE( "%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len );
1079 info->state.cfa_offset = expr;
1080 info->state.cfa_rule = RULE_VAL_EXPRESSION;
1081 ptr += len;
1082 break;
1083 }
1084 case DW_CFA_expression:
1085 case DW_CFA_val_expression:
1086 {
1087 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1088 ULONG_PTR expr = (ULONG_PTR)ptr;
1089 ULONG_PTR len = dwarf_get_uleb128( &ptr );
1090 if (!valid_reg( reg )) break;
1091 TRACE( "%lx: DW_CFA_%sexpression %s %lx-%lx\n",
1092 info->ip, (op == DW_CFA_expression) ? "" : "val_", dwarf_reg_names[reg], expr, expr+len );
1093 info->state.regs[reg] = expr;
1094 info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
1095 ptr += len;
1096 break;
1097 }
1098 default:
1099 FIXME( "%lx: unknown CFA opcode %02x\n", info->ip, op );
1100 break;
1101 }
1102 }
1103 }
1104
1105 /* retrieve a context register from its dwarf number */
1106 static void *get_context_reg( CONTEXT *context, ULONG_PTR dw_reg )
1107 {
1108 switch (dw_reg)
1109 {
1110 case 0: return &context->Rax;
1111 case 1: return &context->Rdx;
1112 case 2: return &context->Rcx;
1113 case 3: return &context->Rbx;
1114 case 4: return &context->Rsi;
1115 case 5: return &context->Rdi;
1116 case 6: return &context->Rbp;
1117 case 7: return &context->Rsp;
1118 case 8: return &context->R8;
1119 case 9: return &context->R9;
1120 case 10: return &context->R10;
1121 case 11: return &context->R11;
1122 case 12: return &context->R12;
1123 case 13: return &context->R13;
1124 case 14: return &context->R14;
1125 case 15: return &context->R15;
1126 case 16: return &context->Rip;
1127 case 17: return &context->u.s.Xmm0;
1128 case 18: return &context->u.s.Xmm1;
1129 case 19: return &context->u.s.Xmm2;
1130 case 20: return &context->u.s.Xmm3;
1131 case 21: return &context->u.s.Xmm4;
1132 case 22: return &context->u.s.Xmm5;
1133 case 23: return &context->u.s.Xmm6;
1134 case 24: return &context->u.s.Xmm7;
1135 case 25: return &context->u.s.Xmm8;
1136 case 26: return &context->u.s.Xmm9;
1137 case 27: return &context->u.s.Xmm10;
1138 case 28: return &context->u.s.Xmm11;
1139 case 29: return &context->u.s.Xmm12;
1140 case 30: return &context->u.s.Xmm13;
1141 case 31: return &context->u.s.Xmm14;
1142 case 32: return &context->u.s.Xmm15;
1143 case 33: return &context->u.s.Legacy[0];
1144 case 34: return &context->u.s.Legacy[1];
1145 case 35: return &context->u.s.Legacy[2];
1146 case 36: return &context->u.s.Legacy[3];
1147 case 37: return &context->u.s.Legacy[4];
1148 case 38: return &context->u.s.Legacy[5];
1149 case 39: return &context->u.s.Legacy[6];
1150 case 40: return &context->u.s.Legacy[7];
1151 default: return NULL;
1152 }
1153 }
1154
1155 /* set a context register from its dwarf number */
1156 static void set_context_reg( CONTEXT *context, ULONG_PTR dw_reg, void *val )
1157 {
1158 switch (dw_reg)
1159 {
1160 case 0: context->Rax = *(ULONG64 *)val; break;
1161 case 1: context->Rdx = *(ULONG64 *)val; break;
1162 case 2: context->Rcx = *(ULONG64 *)val; break;
1163 case 3: context->Rbx = *(ULONG64 *)val; break;
1164 case 4: context->Rsi = *(ULONG64 *)val; break;
1165 case 5: context->Rdi = *(ULONG64 *)val; break;
1166 case 6: context->Rbp = *(ULONG64 *)val; break;
1167 case 7: context->Rsp = *(ULONG64 *)val; break;
1168 case 8: context->R8 = *(ULONG64 *)val; break;
1169 case 9: context->R9 = *(ULONG64 *)val; break;
1170 case 10: context->R10 = *(ULONG64 *)val; break;
1171 case 11: context->R11 = *(ULONG64 *)val; break;
1172 case 12: context->R12 = *(ULONG64 *)val; break;
1173 case 13: context->R13 = *(ULONG64 *)val; break;
1174 case 14: context->R14 = *(ULONG64 *)val; break;
1175 case 15: context->R15 = *(ULONG64 *)val; break;
1176 case 16: context->Rip = *(ULONG64 *)val; break;
1177 case 17: memcpy( &context->u.s.Xmm0, val, sizeof(M128A) ); break;
1178 case 18: memcpy( &context->u.s.Xmm1, val, sizeof(M128A) ); break;
1179 case 19: memcpy( &context->u.s.Xmm2, val, sizeof(M128A) ); break;
1180 case 20: memcpy( &context->u.s.Xmm3, val, sizeof(M128A) ); break;
1181 case 21: memcpy( &context->u.s.Xmm4, val, sizeof(M128A) ); break;
1182 case 22: memcpy( &context->u.s.Xmm5, val, sizeof(M128A) ); break;
1183 case 23: memcpy( &context->u.s.Xmm6, val, sizeof(M128A) ); break;
1184 case 24: memcpy( &context->u.s.Xmm7, val, sizeof(M128A) ); break;
1185 case 25: memcpy( &context->u.s.Xmm8, val, sizeof(M128A) ); break;
1186 case 26: memcpy( &context->u.s.Xmm9, val, sizeof(M128A) ); break;
1187 case 27: memcpy( &context->u.s.Xmm10, val, sizeof(M128A) ); break;
1188 case 28: memcpy( &context->u.s.Xmm11, val, sizeof(M128A) ); break;
1189 case 29: memcpy( &context->u.s.Xmm12, val, sizeof(M128A) ); break;
1190 case 30: memcpy( &context->u.s.Xmm13, val, sizeof(M128A) ); break;
1191 case 31: memcpy( &context->u.s.Xmm14, val, sizeof(M128A) ); break;
1192 case 32: memcpy( &context->u.s.Xmm15, val, sizeof(M128A) ); break;
1193 case 33: memcpy( &context->u.s.Legacy[0], val, sizeof(M128A) ); break;
1194 case 34: memcpy( &context->u.s.Legacy[1], val, sizeof(M128A) ); break;
1195 case 35: memcpy( &context->u.s.Legacy[2], val, sizeof(M128A) ); break;
1196 case 36: memcpy( &context->u.s.Legacy[3], val, sizeof(M128A) ); break;
1197 case 37: memcpy( &context->u.s.Legacy[4], val, sizeof(M128A) ); break;
1198 case 38: memcpy( &context->u.s.Legacy[5], val, sizeof(M128A) ); break;
1199 case 39: memcpy( &context->u.s.Legacy[6], val, sizeof(M128A) ); break;
1200 case 40: memcpy( &context->u.s.Legacy[7], val, sizeof(M128A) ); break;
1201 }
1202 }
1203
1204 static ULONG_PTR eval_expression( const unsigned char *p, CONTEXT *context )
1205 {
1206 ULONG_PTR reg, tmp, stack[64];
1207 int sp = -1;
1208 ULONG_PTR len = dwarf_get_uleb128(&p);
1209 const unsigned char *end = p + len;
1210
1211 while (p < end)
1212 {
1213 unsigned char opcode = dwarf_get_u1(&p);
1214
1215 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
1216 stack[++sp] = opcode - DW_OP_lit0;
1217 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
1218 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_reg0 );
1219 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
1220 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_breg0 ) + dwarf_get_sleb128(&p);
1221 else switch (opcode)
1222 {
1223 case DW_OP_nop: break;
1224 case DW_OP_addr: stack[++sp] = dwarf_get_u8(&p); break;
1225 case DW_OP_const1u: stack[++sp] = dwarf_get_u1(&p); break;
1226 case DW_OP_const1s: stack[++sp] = (signed char)dwarf_get_u1(&p); break;
1227 case DW_OP_const2u: stack[++sp] = dwarf_get_u2(&p); break;
1228 case DW_OP_const2s: stack[++sp] = (short)dwarf_get_u2(&p); break;
1229 case DW_OP_const4u: stack[++sp] = dwarf_get_u4(&p); break;
1230 case DW_OP_const4s: stack[++sp] = (signed int)dwarf_get_u4(&p); break;
1231 case DW_OP_const8u: stack[++sp] = dwarf_get_u8(&p); break;
1232 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf_get_u8(&p); break;
1233 case DW_OP_constu: stack[++sp] = dwarf_get_uleb128(&p); break;
1234 case DW_OP_consts: stack[++sp] = dwarf_get_sleb128(&p); break;
1235 case DW_OP_deref: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
1236 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
1237 case DW_OP_drop: sp--; break;
1238 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
1239 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf_get_u1(&p)]; sp++; break;
1240 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
1241 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
1242 case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
1243 case DW_OP_neg: stack[sp] = -stack[sp]; break;
1244 case DW_OP_not: stack[sp] = ~stack[sp]; break;
1245 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
1246 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
1247 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
1248 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
1249 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
1250 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
1251 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
1252 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
1253 case DW_OP_plus_uconst: stack[sp] += dwarf_get_uleb128(&p); break;
1254 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
1255 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
1256 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
1257 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
1258 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
1259 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
1260 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
1261 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
1262 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
1263 case DW_OP_skip: tmp = (short)dwarf_get_u2(&p); p += tmp; break;
1264 case DW_OP_bra: tmp = (short)dwarf_get_u2(&p); if (!stack[sp--]) p += tmp; break;
1265 case DW_OP_GNU_encoded_addr: tmp = *p++; stack[++sp] = dwarf_get_ptr( &p, tmp ); break;
1266 case DW_OP_regx: stack[++sp] = *(ULONG_PTR *)get_context_reg( context, dwarf_get_uleb128(&p) ); break;
1267 case DW_OP_bregx:
1268 reg = dwarf_get_uleb128(&p);
1269 tmp = dwarf_get_sleb128(&p);
1270 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, reg ) + tmp;
1271 break;
1272 case DW_OP_deref_size:
1273 switch (*p++)
1274 {
1275 case 1: stack[sp] = *(unsigned char *)stack[sp]; break;
1276 case 2: stack[sp] = *(unsigned short *)stack[sp]; break;
1277 case 4: stack[sp] = *(unsigned int *)stack[sp]; break;
1278 case 8: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
1279 }
1280 break;
1281 default:
1282 FIXME( "unhandled opcode %02x\n", opcode );
1283 }
1284 }
1285 return stack[sp];
1286 }
1287
1288 /* apply the computed frame info to the actual context */
1289 static void apply_frame_state( CONTEXT *context, struct frame_state *state )
1290 {
1291 unsigned int i;
1292 ULONG_PTR cfa, value;
1293 CONTEXT new_context = *context;
1294
1295 switch (state->cfa_rule)
1296 {
1297 case RULE_EXPRESSION:
1298 cfa = *(ULONG_PTR *)eval_expression( (const unsigned char *)state->cfa_offset, context );
1299 break;
1300 case RULE_VAL_EXPRESSION:
1301 cfa = eval_expression( (const unsigned char *)state->cfa_offset, context );
1302 break;
1303 default:
1304 cfa = *(ULONG_PTR *)get_context_reg( context, state->cfa_reg ) + state->cfa_offset;
1305 break;
1306 }
1307 if (!cfa) return;
1308
1309 for (i = 0; i < NB_FRAME_REGS; i++)
1310 {
1311 switch (state->rules[i])
1312 {
1313 case RULE_UNSET:
1314 case RULE_UNDEFINED:
1315 case RULE_SAME:
1316 break;
1317 case RULE_CFA_OFFSET:
1318 set_context_reg( &new_context, i, (char *)cfa + state->regs[i] );
1319 break;
1320 case RULE_OTHER_REG:
1321 set_context_reg( &new_context, i, get_context_reg( context, state->regs[i] ));
1322 break;
1323 case RULE_EXPRESSION:
1324 value = eval_expression( (const unsigned char *)state->regs[i], context );
1325 set_context_reg( &new_context, i, (void *)value );
1326 break;
1327 case RULE_VAL_EXPRESSION:
1328 value = eval_expression( (const unsigned char *)state->regs[i], context );
1329 set_context_reg( &new_context, i, &value );
1330 break;
1331 }
1332 }
1333 new_context.Rsp = cfa;
1334 *context = new_context;
1335 }
1336
1337
1338 /***********************************************************************
1339 * dwarf_virtual_unwind
1340 *
1341 * Equivalent of RtlVirtualUnwind for builtin modules.
1342 */
1343 static NTSTATUS dwarf_virtual_unwind( ULONG64 ip, ULONG64 *frame,CONTEXT *context,
1344 const struct dwarf_fde *fde, const struct dwarf_eh_bases *bases,
1345 PEXCEPTION_ROUTINE *handler, void **handler_data )
1346 {
1347 const struct dwarf_cie *cie;
1348 const unsigned char *ptr, *augmentation, *end;
1349 ULONG_PTR len, code_end;
1350 struct frame_info info;
1351 struct frame_state state_stack[MAX_SAVED_STATES];
1352 int aug_z_format = 0;
1353 unsigned char lsda_encoding = DW_EH_PE_omit;
1354
1355 memset( &info, 0, sizeof(info) );
1356 info.state_stack = state_stack;
1357 info.ip = (ULONG_PTR)bases->func;
1358 *handler = NULL;
1359
1360 cie = (const struct dwarf_cie *)((const char *)&fde->cie_offset - fde->cie_offset);
1361
1362 /* parse the CIE first */
1363
1364 if (cie->version != 1 && cie->version != 3)
1365 {
1366 FIXME( "unknown CIE version %u at %p\n", cie->version, cie );
1367 return STATUS_INVALID_DISPOSITION;
1368 }
1369 ptr = cie->augmentation + strlen((const char *)cie->augmentation) + 1;
1370
1371 info.code_align = dwarf_get_uleb128( &ptr );
1372 info.data_align = dwarf_get_sleb128( &ptr );
1373 if (cie->version == 1)
1374 info.retaddr_reg = *ptr++;
1375 else
1376 info.retaddr_reg = dwarf_get_uleb128( &ptr );
1377 info.state.cfa_rule = RULE_CFA_OFFSET;
1378
1379 TRACE( "function %lx base %p cie %p len %x id %x version %x aug '%s' code_align %lu data_align %ld retaddr %s\n",
1380 ip, bases->func, cie, cie->length, cie->id, cie->version, cie->augmentation,
1381 info.code_align, info.data_align, dwarf_reg_names[info.retaddr_reg] );
1382
1383 end = NULL;
1384 for (augmentation = cie->augmentation; *augmentation; augmentation++)
1385 {
1386 switch (*augmentation)
1387 {
1388 case 'z':
1389 len = dwarf_get_uleb128( &ptr );
1390 end = ptr + len;
1391 aug_z_format = 1;
1392 continue;
1393 case 'L':
1394 lsda_encoding = *ptr++;
1395 continue;
1396 case 'P':
1397 {
1398 unsigned char encoding = *ptr++;
1399 *handler = (void *)dwarf_get_ptr( &ptr, encoding );
1400 continue;
1401 }
1402 case 'R':
1403 info.fde_encoding = *ptr++;
1404 continue;
1405 case 'S':
1406 info.signal_frame = 1;
1407 continue;
1408 }
1409 FIXME( "unknown augmentation '%c'\n", *augmentation );
1410 if (!end) return STATUS_INVALID_DISPOSITION; /* cannot continue */
1411 break;
1412 }
1413 if (end) ptr = end;
1414
1415 end = (const unsigned char *)(&cie->length + 1) + cie->length;
1416 execute_cfa_instructions( ptr, end, ip, &info );
1417
1418 ptr = (const unsigned char *)(fde + 1);
1419 info.ip = dwarf_get_ptr( &ptr, info.fde_encoding ); /* fde code start */
1420 code_end = info.ip + dwarf_get_ptr( &ptr, info.fde_encoding & 0x0f ); /* fde code length */
1421
1422 if (aug_z_format) /* get length of augmentation data */
1423 {
1424 len = dwarf_get_uleb128( &ptr );
1425 end = ptr + len;
1426 }
1427 else end = NULL;
1428
1429 *handler_data = (void *)dwarf_get_ptr( &ptr, lsda_encoding );
1430 if (end) ptr = end;
1431
1432 end = (const unsigned char *)(&fde->length + 1) + fde->length;
1433 TRACE( "fde %p len %x personality %p lsda %p code %lx-%lx\n",
1434 fde, fde->length, *handler, *handler_data, info.ip, code_end );
1435 execute_cfa_instructions( ptr, end, ip, &info );
1436 *frame = context->Rsp;
1437 apply_frame_state( context, &info.state );
1438
1439 TRACE( "next function rip=%016lx\n", context->Rip );
1440 TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
1441 context->Rax, context->Rbx, context->Rcx, context->Rdx );
1442 TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
1443 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
1444 TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
1445 context->R8, context->R9, context->R10, context->R11 );
1446 TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
1447 context->R12, context->R13, context->R14, context->R15 );
1448
1449 return STATUS_SUCCESS;
1450 }
1451
1452
1453 #ifdef HAVE_LIBUNWIND_H
1454 /***********************************************************************
1455 * libunwind_set_cursor_from_context
1456 */
1457 static int libunwind_set_cursor_from_context( unw_cursor_t *cursor, CONTEXT *context, ULONG64 ip )
1458 {
1459 int rc;
1460
1461 rc = unw_set_reg(cursor, UNW_REG_IP, ip);
1462 if (rc == UNW_ESUCCESS)
1463 rc = unw_set_reg(cursor, UNW_REG_SP, context->Rsp);
1464 if (rc == UNW_ESUCCESS)
1465 rc = unw_set_reg(cursor, UNW_X86_64_RAX, context->Rax);
1466 if (rc == UNW_ESUCCESS)
1467 rc = unw_set_reg(cursor, UNW_X86_64_RDX, context->Rdx);
1468 if (rc == UNW_ESUCCESS)
1469 rc = unw_set_reg(cursor, UNW_X86_64_RCX, context->Rcx);
1470 if (rc == UNW_ESUCCESS)
1471 rc = unw_set_reg(cursor, UNW_X86_64_RBX, context->Rbx);
1472 if (rc == UNW_ESUCCESS)
1473 rc = unw_set_reg(cursor, UNW_X86_64_RSI, context->Rsi);
1474 if (rc == UNW_ESUCCESS)
1475 rc = unw_set_reg(cursor, UNW_X86_64_RDI, context->Rdi);
1476 if (rc == UNW_ESUCCESS)
1477 rc = unw_set_reg(cursor, UNW_X86_64_RBP, context->Rbp);
1478 if (rc == UNW_ESUCCESS)
1479 rc = unw_set_reg(cursor, UNW_X86_64_R8, context->R8);
1480 if (rc == UNW_ESUCCESS)
1481 rc = unw_set_reg(cursor, UNW_X86_64_R9, context->R9);
1482 if (rc == UNW_ESUCCESS)
1483 rc = unw_set_reg(cursor, UNW_X86_64_R10, context->R10);
1484 if (rc == UNW_ESUCCESS)
1485 rc = unw_set_reg(cursor, UNW_X86_64_R11, context->R11);
1486 if (rc == UNW_ESUCCESS)
1487 rc = unw_set_reg(cursor, UNW_X86_64_R12, context->R12);
1488 if (rc == UNW_ESUCCESS)
1489 rc = unw_set_reg(cursor, UNW_X86_64_R13, context->R13);
1490 if (rc == UNW_ESUCCESS)
1491 rc = unw_set_reg(cursor, UNW_X86_64_R14, context->R14);
1492 if (rc == UNW_ESUCCESS)
1493 rc = unw_set_reg(cursor, UNW_X86_64_R15, context->R15);
1494
1495 return rc;
1496 }
1497
1498
1499 /***********************************************************************
1500 * libunwind_get_reg
1501 */
1502 static int libunwind_get_reg( unw_cursor_t *cursor, unw_regnum_t reg, ULONG64 *val )
1503 {
1504 int rc;
1505 unw_word_t word;
1506
1507 rc = unw_get_reg(cursor, reg, &word);
1508 if (rc == UNW_ESUCCESS)
1509 *val = word;
1510
1511 return rc;
1512 }
1513
1514
1515 /***********************************************************************
1516 * libunwind_set_context_from_cursor
1517 */
1518 static BOOL libunwind_set_context_from_cursor( CONTEXT *context, unw_cursor_t *cursor )
1519 {
1520 int rc;
1521
1522 rc = libunwind_get_reg(cursor, UNW_REG_IP, &context->Rip);
1523 if (rc == UNW_ESUCCESS)
1524 rc = libunwind_get_reg(cursor, UNW_REG_SP, &context->Rsp);
1525 if (rc == UNW_ESUCCESS)
1526 rc = libunwind_get_reg(cursor, UNW_X86_64_RAX, &context->Rax);
1527 if (rc == UNW_ESUCCESS)
1528 rc = libunwind_get_reg(cursor, UNW_X86_64_RDX, &context->Rdx);
1529 if (rc == UNW_ESUCCESS)
1530 rc = libunwind_get_reg(cursor, UNW_X86_64_RCX, &context->Rcx);
1531 if (rc == UNW_ESUCCESS)
1532 rc = libunwind_get_reg(cursor, UNW_X86_64_RBX, &context->Rbx);
1533 if (rc == UNW_ESUCCESS)
1534 rc = libunwind_get_reg(cursor, UNW_X86_64_RSI, &context->Rsi);
1535 if (rc == UNW_ESUCCESS)
1536 rc = libunwind_get_reg(cursor, UNW_X86_64_RDI, &context->Rdi);
1537 if (rc == UNW_ESUCCESS)
1538 rc = libunwind_get_reg(cursor, UNW_X86_64_RBP, &context->Rbp);
1539 if (rc == UNW_ESUCCESS)
1540 rc = libunwind_get_reg(cursor, UNW_X86_64_R8, &context->R8);
1541 if (rc == UNW_ESUCCESS)
1542 rc = libunwind_get_reg(cursor, UNW_X86_64_R9, &context->R9);
1543 if (rc == UNW_ESUCCESS)
1544 rc = libunwind_get_reg(cursor, UNW_X86_64_R10, &context->R10);
1545 if (rc == UNW_ESUCCESS)
1546 rc = libunwind_get_reg(cursor, UNW_X86_64_R11, &context->R11);
1547 if (rc == UNW_ESUCCESS)
1548 rc = libunwind_get_reg(cursor, UNW_X86_64_R12, &context->R12);
1549 if (rc == UNW_ESUCCESS)
1550 rc = libunwind_get_reg(cursor, UNW_X86_64_R13, &context->R13);
1551 if (rc == UNW_ESUCCESS)
1552 rc = libunwind_get_reg(cursor, UNW_X86_64_R14, &context->R14);
1553 if (rc == UNW_ESUCCESS)
1554 rc = libunwind_get_reg(cursor, UNW_X86_64_R15, &context->R15);
1555
1556 return rc;
1557 }
1558
1559
1560 /***********************************************************************
1561 * libunwind_virtual_unwind
1562 *
1563 * Equivalent of RtlVirtualUnwind for builtin modules.
1564 */
1565 static NTSTATUS libunwind_virtual_unwind( ULONG64 ip, BOOL* got_info, ULONG64 *frame, CONTEXT *context,
1566 PEXCEPTION_ROUTINE *handler, void **handler_data )
1567 {
1568 unw_context_t unw_context;
1569 unw_cursor_t cursor;
1570 unw_proc_info_t info;
1571 int rc;
1572
1573 rc = unw_getcontext( &unw_context );
1574 if (rc == UNW_ESUCCESS)
1575 rc = unw_init_local( &cursor, &unw_context );
1576 if (rc == UNW_ESUCCESS)
1577 rc = libunwind_set_cursor_from_context( &cursor, context, ip - 1 );
1578 if (rc != UNW_ESUCCESS)
1579 {
1580 WARN( "setup failed: %d\n", rc );
1581 return STATUS_INVALID_DISPOSITION;
1582 }
1583
1584 rc = unw_get_proc_info(&cursor, &info);
1585 if (rc != UNW_ESUCCESS && rc != UNW_ENOINFO)
1586 {
1587 WARN( "failed to get info: %d\n", rc );
1588 return STATUS_INVALID_DISPOSITION;
1589 }
1590 if (rc == UNW_ENOINFO || ip < info.start_ip || info.end_ip <= ip || !info.format)
1591 {
1592 *got_info = FALSE;
1593 return STATUS_SUCCESS;
1594 }
1595
1596 TRACE( "ip %#lx function %#lx-%#lx personality %#lx lsda %#lx fde %#lx\n",
1597 ip, (unsigned long)info.start_ip, (unsigned long)info.end_ip, (unsigned long)info.handler,
1598 (unsigned long)info.lsda, (unsigned long)info.unwind_info );
1599
1600 rc = unw_step(&cursor);
1601 if (rc < 0)
1602 {
1603 WARN( "failed to unwind: %d\n", rc );
1604 return STATUS_INVALID_DISPOSITION;
1605 }
1606
1607 *frame = context->Rsp;
1608
1609 rc = libunwind_set_context_from_cursor( context, &cursor );
1610 if (rc != UNW_ESUCCESS)
1611 {
1612 WARN( "failed to update context after unwind: %d\n", rc );
1613 return STATUS_INVALID_DISPOSITION;
1614 }
1615
1616 *handler = (void*)info.handler;
1617 *handler_data = (void*)info.lsda;
1618 *got_info = TRUE;
1619
1620 TRACE( "next function rip=%016lx\n", context->Rip );
1621 TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
1622 context->Rax, context->Rbx, context->Rcx, context->Rdx );
1623 TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
1624 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
1625 TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
1626 context->R8, context->R9, context->R10, context->R11 );
1627 TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
1628 context->R12, context->R13, context->R14, context->R15 );
1629
1630 return STATUS_SUCCESS;
1631 }
1632 #endif
1633
1634
1635 /***********************************************************************
1636 * dispatch_signal
1637 */
1638 static inline int dispatch_signal(unsigned int sig)
1639 {
1640 if (handlers[sig] == NULL) return 0;
1641 return handlers[sig](sig);
1642 }
1643
1644 /***********************************************************************
1645 * get_signal_stack
1646 *
1647 * Get the base of the signal stack for the current thread.
1648 */
1649 static inline void *get_signal_stack(void)
1650 {
1651 return (char *)NtCurrentTeb() + teb_size;
1652 }
1653
1654 /***********************************************************************
1655 * is_inside_signal_stack
1656 *
1657 * Check if pointer is inside the signal stack.
1658 */
1659 static inline BOOL is_inside_signal_stack( void *ptr )
1660 {
1661 return ((char *)ptr >= (char *)get_signal_stack() &&
1662 (char *)ptr < (char *)get_signal_stack() + signal_stack_size);
1663 }
1664
1665 /***********************************************************************
1666 * save_context
1667 *
1668 * Set the register values from a sigcontext.
1669 */
1670 static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
1671 {
1672 context->ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS;
1673 context->Rax = RAX_sig(sigcontext);
1674 context->Rcx = RCX_sig(sigcontext);
1675 context->Rdx = RDX_sig(sigcontext);
1676 context->Rbx = RBX_sig(sigcontext);
1677 context->Rsp = RSP_sig(sigcontext);
1678 context->Rbp = RBP_sig(sigcontext);
1679 context->Rsi = RSI_sig(sigcontext);
1680 context->Rdi = RDI_sig(sigcontext);
1681 context->R8 = R8_sig(sigcontext);
1682 context->R9 = R9_sig(sigcontext);
1683 context->R10 = R10_sig(sigcontext);
1684 context->R11 = R11_sig(sigcontext);
1685 context->R12 = R12_sig(sigcontext);
1686 context->R13 = R13_sig(sigcontext);
1687 context->R14 = R14_sig(sigcontext);
1688 context->R15 = R15_sig(sigcontext);
1689 context->Rip = RIP_sig(sigcontext);
1690 context->SegCs = CS_sig(sigcontext);
1691 context->SegFs = FS_sig(sigcontext);
1692 context->SegGs = GS_sig(sigcontext);
1693 context->EFlags = EFL_sig(sigcontext);
1694 #ifdef DS_sig
1695 context->SegDs = DS_sig(sigcontext);
1696 #else
1697 __asm__("movw %%ds,%0" : "=m" (context->SegDs));
1698 #endif
1699 #ifdef ES_sig
1700 context->SegEs = ES_sig(sigcontext);
1701 #else
1702 __asm__("movw %%es,%0" : "=m" (context->SegEs));
1703 #endif
1704 #ifdef SS_sig
1705 context->SegSs = SS_sig(sigcontext);
1706 #else
1707 __asm__("movw %%ss,%0" : "=m" (context->SegSs));
1708 #endif
1709 context->Dr0 = amd64_thread_data()->dr0;
1710 context->Dr1 = amd64_thread_data()->dr1;
1711 context->Dr2 = amd64_thread_data()->dr2;
1712 context->Dr3 = amd64_thread_data()->dr3;
1713 context->Dr6 = amd64_thread_data()->dr6;
1714 context->Dr7 = amd64_thread_data()->dr7;
1715 if (FPU_sig(sigcontext))
1716 {
1717 context->ContextFlags |= CONTEXT_FLOATING_POINT;
1718 context->u.FltSave = *FPU_sig(sigcontext);
1719 context->MxCsr = context->u.FltSave.MxCsr;
1720 }
1721 }
1722
1723
1724 /***********************************************************************
1725 * restore_context
1726 *
1727 * Build a sigcontext from the register values.
1728 */
1729 static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
1730 {
1731 amd64_thread_data()->dr0 = context->Dr0;
1732 amd64_thread_data()->dr1 = context->Dr1;
1733 amd64_thread_data()->dr2 = context->Dr2;
1734 amd64_thread_data()->dr3 = context->Dr3;
1735 amd64_thread_data()->dr6 = context->Dr6;
1736 amd64_thread_data()->dr7 = context->Dr7;
1737 RAX_sig(sigcontext) = context->Rax;
1738 RCX_sig(sigcontext) = context->Rcx;
1739 RDX_sig(sigcontext) = context->Rdx;
1740 RBX_sig(sigcontext) = context->Rbx;
1741 RSP_sig(sigcontext) = context->Rsp;
1742 RBP_sig(sigcontext) = context->Rbp;
1743 RSI_sig(sigcontext) = context->Rsi;
1744 RDI_sig(sigcontext) = context->Rdi;
1745 R8_sig(sigcontext) = context->R8;
1746 R9_sig(sigcontext) = context->R9;
1747 R10_sig(sigcontext) = context->R10;
1748 R11_sig(sigcontext) = context->R11;
1749 R12_sig(sigcontext) = context->R12;
1750 R13_sig(sigcontext) = context->R13;
1751 R14_sig(sigcontext) = context->R14;
1752 R15_sig(sigcontext) = context->R15;
1753 RIP_sig(sigcontext) = context->Rip;
1754 CS_sig(sigcontext) = context->SegCs;
1755 FS_sig(sigcontext) = context->SegFs;
1756 GS_sig(sigcontext) = context->SegGs;
1757 EFL_sig(sigcontext) = context->EFlags;
1758 #ifdef DS_sig
1759 DS_sig(sigcontext) = context->SegDs;
1760 #endif
1761 #ifdef ES_sig
1762 ES_sig(sigcontext) = context->SegEs;
1763 #endif
1764 #ifdef SS_sig
1765 SS_sig(sigcontext) = context->SegSs;
1766 #endif
1767 if (FPU_sig(sigcontext)) *FPU_sig(sigcontext) = context->u.FltSave;
1768 }
1769
1770
1771 /**************************************************************************
1772 * __chkstk (NTDLL.@)
1773 *
1774 * Supposed to touch all the stack pages, but we shouldn't need that.
1775 */
1776 __ASM_GLOBAL_FUNC( __chkstk, "ret" );
1777
1778
1779 /***********************************************************************
1780 * RtlCaptureContext (NTDLL.@)
1781 */
1782 __ASM_GLOBAL_FUNC( RtlCaptureContext,
1783 "pushfq\n\t"
1784 __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
1785 "movl $0x001000f,0x30(%rcx)\n\t" /* context->ContextFlags */
1786 "stmxcsr 0x34(%rcx)\n\t" /* context->MxCsr */
1787 "movw %cs,0x38(%rcx)\n\t" /* context->SegCs */
1788 "movw %ds,0x3a(%rcx)\n\t" /* context->SegDs */
1789 "movw %es,0x3c(%rcx)\n\t" /* context->SegEs */
1790 "movw %fs,0x3e(%rcx)\n\t" /* context->SegFs */
1791 "movw %gs,0x40(%rcx)\n\t" /* context->SegGs */
1792 "movw %ss,0x42(%rcx)\n\t" /* context->SegSs */
1793 "popq 0x44(%rcx)\n\t" /* context->Eflags */
1794 __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
1795 "movq %rax,0x78(%rcx)\n\t" /* context->Rax */
1796 "movq %rcx,0x80(%rcx)\n\t" /* context->Rcx */
1797 "movq %rdx,0x88(%rcx)\n\t" /* context->Rdx */
1798 "movq %rbx,0x90(%rcx)\n\t" /* context->Rbx */
1799 "leaq 8(%rsp),%rax\n\t"
1800 "movq %rax,0x98(%rcx)\n\t" /* context->Rsp */
1801 "movq %rbp,0xa0(%rcx)\n\t" /* context->Rbp */
1802 "movq %rsi,0xa8(%rcx)\n\t" /* context->Rsi */
1803 "movq %rdi,0xb0(%rcx)\n\t" /* context->Rdi */
1804 "movq %r8,0xb8(%rcx)\n\t" /* context->R8 */
1805 "movq %r9,0xc0(%rcx)\n\t" /* context->R9 */
1806 "movq %r10,0xc8(%rcx)\n\t" /* context->R10 */
1807 "movq %r11,0xd0(%rcx)\n\t" /* context->R11 */
1808 "movq %r12,0xd8(%rcx)\n\t" /* context->R12 */
1809 "movq %r13,0xe0(%rcx)\n\t" /* context->R13 */
1810 "movq %r14,0xe8(%rcx)\n\t" /* context->R14 */
1811 "movq %r15,0xf0(%rcx)\n\t" /* context->R15 */
1812 "movq (%rsp),%rax\n\t"
1813 "movq %rax,0xf8(%rcx)\n\t" /* context->Rip */
1814 "fxsave 0x100(%rcx)\n\t" /* context->FtlSave */
1815 "movdqa %xmm0,0x1a0(%rcx)\n\t" /* context->Xmm0 */
1816 "movdqa %xmm1,0x1b0(%rcx)\n\t" /* context->Xmm1 */
1817 "movdqa %xmm2,0x1c0(%rcx)\n\t" /* context->Xmm2 */
1818 "movdqa %xmm3,0x1d0(%rcx)\n\t" /* context->Xmm3 */
1819 "movdqa %xmm4,0x1e0(%rcx)\n\t" /* context->Xmm4 */
1820 "movdqa %xmm5,0x1f0(%rcx)\n\t" /* context->Xmm5 */
1821 "movdqa %xmm6,0x200(%rcx)\n\t" /* context->Xmm6 */
1822 "movdqa %xmm7,0x210(%rcx)\n\t" /* context->Xmm7 */
1823 "movdqa %xmm8,0x220(%rcx)\n\t" /* context->Xmm8 */
1824 "movdqa %xmm9,0x230(%rcx)\n\t" /* context->Xmm9 */
1825 "movdqa %xmm10,0x240(%rcx)\n\t" /* context->Xmm10 */
1826 "movdqa %xmm11,0x250(%rcx)\n\t" /* context->Xmm11 */
1827 "movdqa %xmm12,0x260(%rcx)\n\t" /* context->Xmm12 */
1828 "movdqa %xmm13,0x270(%rcx)\n\t" /* context->Xmm13 */
1829 "movdqa %xmm14,0x280(%rcx)\n\t" /* context->Xmm14 */
1830 "movdqa %xmm15,0x290(%rcx)\n\t" /* context->Xmm15 */
1831 "ret" );
1832
1833 /***********************************************************************
1834 * set_full_cpu_context
1835 *
1836 * Set the new CPU context.
1837 */
1838 extern void set_full_cpu_context( const CONTEXT *context );
1839 __ASM_GLOBAL_FUNC( set_full_cpu_context,
1840 "subq $40,%rsp\n\t"
1841 __ASM_CFI(".cfi_adjust_cfa_offset 40\n\t")
1842 "ldmxcsr 0x34(%rdi)\n\t" /* context->MxCsr */
1843 "movw 0x38(%rdi),%ax\n\t" /* context->SegCs */
1844 "movq %rax,8(%rsp)\n\t"
1845 "movw 0x42(%rdi),%ax\n\t" /* context->SegSs */
1846 "movq %rax,32(%rsp)\n\t"
1847 "movq 0x44(%rdi),%rax\n\t" /* context->Eflags */
1848 "movq %rax,16(%rsp)\n\t"
1849 "movq 0x80(%rdi),%rcx\n\t" /* context->Rcx */
1850 "movq 0x88(%rdi),%rdx\n\t" /* context->Rdx */
1851 "movq 0x90(%rdi),%rbx\n\t" /* context->Rbx */
1852 "movq 0x98(%rdi),%rax\n\t" /* context->Rsp */
1853 "movq %rax,24(%rsp)\n\t"
1854 "movq 0xa0(%rdi),%rbp\n\t" /* context->Rbp */
1855 "movq 0xa8(%rdi),%rsi\n\t" /* context->Rsi */
1856 "movq 0xb8(%rdi),%r8\n\t" /* context->R8 */
1857 "movq 0xc0(%rdi),%r9\n\t" /* context->R9 */
1858 "movq 0xc8(%rdi),%r10\n\t" /* context->R10 */
1859 "movq 0xd0(%rdi),%r11\n\t" /* context->R11 */
1860 "movq 0xd8(%rdi),%r12\n\t" /* context->R12 */
1861 "movq 0xe0(%rdi),%r13\n\t" /* context->R13 */
1862 "movq 0xe8(%rdi),%r14\n\t" /* context->R14 */
1863 "movq 0xf0(%rdi),%r15\n\t" /* context->R15 */
1864 "movq 0xf8(%rdi),%rax\n\t" /* context->Rip */
1865 "movq %rax,(%rsp)\n\t"
1866 "fxrstor 0x100(%rdi)\n\t" /* context->FtlSave */
1867 "movdqa 0x1a0(%rdi),%xmm0\n\t" /* context->Xmm0 */
1868 "movdqa 0x1b0(%rdi),%xmm1\n\t" /* context->Xmm1 */
1869 "movdqa 0x1c0(%rdi),%xmm2\n\t" /* context->Xmm2 */
1870 "movdqa 0x1d0(%rdi),%xmm3\n\t" /* context->Xmm3 */
1871 "movdqa 0x1e0(%rdi),%xmm4\n\t" /* context->Xmm4 */
1872 "movdqa 0x1f0(%rdi),%xmm5\n\t" /* context->Xmm5 */
1873 "movdqa 0x200(%rdi),%xmm6\n\t" /* context->Xmm6 */
1874 "movdqa 0x210(%rdi),%xmm7\n\t" /* context->Xmm7 */
1875 "movdqa 0x220(%rdi),%xmm8\n\t" /* context->Xmm8 */
1876 "movdqa 0x230(%rdi),%xmm9\n\t" /* context->Xmm9 */
1877 "movdqa 0x240(%rdi),%xmm10\n\t" /* context->Xmm10 */
1878 "movdqa 0x250(%rdi),%xmm11\n\t" /* context->Xmm11 */
1879 "movdqa 0x260(%rdi),%xmm12\n\t" /* context->Xmm12 */
1880 "movdqa 0x270(%rdi),%xmm13\n\t" /* context->Xmm13 */
1881 "movdqa 0x280(%rdi),%xmm14\n\t" /* context->Xmm14 */
1882 "movdqa 0x290(%rdi),%xmm15\n\t" /* context->Xmm15 */
1883 "movq 0x78(%rdi),%rax\n\t" /* context->Rax */
1884 "movq 0xb0(%rdi),%rdi\n\t" /* context->Rdi */
1885 "iretq" );
1886
1887
1888 /***********************************************************************
1889 * set_cpu_context
1890 *
1891 * Set the new CPU context. Used by NtSetContextThread.
1892 */
1893 void DECLSPEC_HIDDEN set_cpu_context( const CONTEXT *context )
1894 {
1895 DWORD flags = context->ContextFlags & ~CONTEXT_AMD64;
1896
1897 if (flags & CONTEXT_DEBUG_REGISTERS)
1898 {
1899 amd64_thread_data()->dr0 = context->Dr0;
1900 amd64_thread_data()->dr1 = context->Dr1;
1901 amd64_thread_data()->dr2 = context->Dr2;
1902 amd64_thread_data()->dr3 = context->Dr3;
1903 amd64_thread_data()->dr6 = context->Dr6;
1904 amd64_thread_data()->dr7 = context->Dr7;
1905 }
1906 if (flags & CONTEXT_FULL)
1907 {
1908 if (!(flags & CONTEXT_CONTROL))
1909 FIXME( "setting partial context (%x) not supported\n", flags );
1910 else
1911 set_full_cpu_context( context );
1912 }
1913 }
1914
1915
1916 /***********************************************************************
1917 * copy_context
1918 *
1919 * Copy a register context according to the flags.
1920 */
1921 static void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
1922 {
1923 flags &= ~CONTEXT_AMD64; /* get rid of CPU id */
1924 if (flags & CONTEXT_CONTROL)
1925 {
1926 to->Rbp = from->Rbp;
1927 to->Rip = from->Rip;
1928 to->Rsp = from->Rsp;
1929 to->SegCs = from->SegCs;
1930 to->SegSs = from->SegSs;
1931 to->EFlags = from->EFlags;
1932 }
1933 if (flags & CONTEXT_INTEGER)
1934 {
1935 to->Rax = from->Rax;
1936 to->Rcx = from->Rcx;
1937 to->Rdx = from->Rdx;
1938 to->Rbx = from->Rbx;
1939 to->Rsi = from->Rsi;
1940 to->Rdi = from->Rdi;
1941 to->R8 = from->R8;
1942 to->R9 = from->R9;
1943 to->R10 = from->R10;
1944 to->R11 = from->R11;
1945 to->R12 = from->R12;
1946 to->R13 = from->R13;
1947 to->R14 = from->R14;
1948 to->R15 = from->R15;
1949 }
1950 if (flags & CONTEXT_SEGMENTS)
1951 {
1952 to->SegDs = from->SegDs;
1953 to->SegEs = from->SegEs;
1954 to->SegFs = from->SegFs;
1955 to->SegGs = from->SegGs;
1956 }
1957 if (flags & CONTEXT_FLOATING_POINT)
1958 {
1959 to->MxCsr = from->MxCsr;
1960 to->u.FltSave = from->u.FltSave;
1961 }
1962 if (flags & CONTEXT_DEBUG_REGISTERS)
1963 {
1964 to->Dr0 = from->Dr0;
1965 to->Dr1 = from->Dr1;
1966 to->Dr2 = from->Dr2;
1967 to->Dr3 = from->Dr3;
1968 to->Dr6 = from->Dr6;
1969 to->Dr7 = from->Dr7;
1970 }
1971 }
1972
1973
1974 /***********************************************************************
1975 * context_to_server
1976 *
1977 * Convert a register context to the server format.
1978 */
1979 NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
1980 {
1981 DWORD flags = from->ContextFlags & ~CONTEXT_AMD64; /* get rid of CPU id */
1982
1983 memset( to, 0, sizeof(*to) );
1984 to->cpu = CPU_x86_64;
1985
1986 if (flags & CONTEXT_CONTROL)
1987 {
1988 to->flags |= SERVER_CTX_CONTROL;
1989 to->ctl.x86_64_regs.rbp = from->Rbp;
1990 to->ctl.x86_64_regs.rip = from->Rip;
1991 to->ctl.x86_64_regs.rsp = from->Rsp;
1992 to->ctl.x86_64_regs.cs = from->SegCs;
1993 to->ctl.x86_64_regs.ss = from->SegSs;
1994 to->ctl.x86_64_regs.flags = from->EFlags;
1995 }
1996 if (flags & CONTEXT_INTEGER)
1997 {
1998 to->flags |= SERVER_CTX_INTEGER;
1999 to->integer.x86_64_regs.rax = from->Rax;
2000 to->integer.x86_64_regs.rcx = from->Rcx;
2001 to->integer.x86_64_regs.rdx = from->Rdx;
2002 to->integer.x86_64_regs.rbx = from->Rbx;
2003 to->integer.x86_64_regs.rsi = from->Rsi;
2004 to->integer.x86_64_regs.rdi = from->Rdi;
2005 to->integer.x86_64_regs.r8 = from->R8;
2006 to->integer.x86_64_regs.r9 = from->R9;
2007 to->integer.x86_64_regs.r10 = from->R10;
2008 to->integer.x86_64_regs.r11 = from->R11;
2009 to->integer.x86_64_regs.r12 = from->R12;
2010 to->integer.x86_64_regs.r13 = from->R13;
2011 to->integer.x86_64_regs.r14 = from->R14;
2012 to->integer.x86_64_regs.r15 = from->R15;
2013 }
2014 if (flags & CONTEXT_SEGMENTS)
2015 {
2016 to->flags |= SERVER_CTX_SEGMENTS;
2017 to->seg.x86_64_regs.ds = from->SegDs;
2018 to->seg.x86_64_regs.es = from->SegEs;
2019 to->seg.x86_64_regs.fs = from->SegFs;
2020 to->seg.x86_64_regs.gs = from->SegGs;
2021 }
2022 if (flags & CONTEXT_FLOATING_POINT)
2023 {
2024 to->flags |= SERVER_CTX_FLOATING_POINT;
2025 memcpy( to->fp.x86_64_regs.fpregs, &from->u.FltSave, sizeof(to->fp.x86_64_regs.fpregs) );
2026 }
2027 if (flags & CONTEXT_DEBUG_REGISTERS)
2028 {
2029 to->flags |= SERVER_CTX_DEBUG_REGISTERS;
2030 to->debug.x86_64_regs.dr0 = from->Dr0;
2031 to->debug.x86_64_regs.dr1 = from->Dr1;
2032 to->debug.x86_64_regs.dr2 = from->Dr2;
2033 to->debug.x86_64_regs.dr3 = from->Dr3;
2034 to->debug.x86_64_regs.dr6 = from->Dr6;
2035 to->debug.x86_64_regs.dr7 = from->Dr7;
2036 }
2037 return STATUS_SUCCESS;
2038 }
2039
2040
2041 /***********************************************************************
2042 * context_from_server
2043 *
2044 * Convert a register context from the server format.
2045 */
2046 NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
2047 {
2048 if (from->cpu != CPU_x86_64) return STATUS_INVALID_PARAMETER;
2049
2050 to->ContextFlags = CONTEXT_AMD64;
2051 if (from->flags & SERVER_CTX_CONTROL)
2052 {
2053 to->ContextFlags |= CONTEXT_CONTROL;
2054 to->Rbp = from->ctl.x86_64_regs.rbp;
2055 to->Rip = from->ctl.x86_64_regs.rip;
2056 to->Rsp = from->ctl.x86_64_regs.rsp;
2057 to->SegCs = from->ctl.x86_64_regs.cs;
2058 to->SegSs = from->ctl.x86_64_regs.ss;
2059 to->EFlags = from->ctl.x86_64_regs.flags;
2060 }
2061
2062 if (from->flags & SERVER_CTX_INTEGER)
2063 {
2064 to->ContextFlags |= CONTEXT_INTEGER;
2065 to->Rax = from->integer.x86_64_regs.rax;
2066 to->Rcx = from->integer.x86_64_regs.rcx;
2067 to->Rdx = from->integer.x86_64_regs.rdx;
2068 to->Rbx = from->integer.x86_64_regs.rbx;
2069 to->Rsi = from->integer.x86_64_regs.rsi;
2070 to->Rdi = from->integer.x86_64_regs.rdi;
2071 to->R8 = from->integer.x86_64_regs.r8;
2072 to->R9 = from->integer.x86_64_regs.r9;
2073 to->R10 = from->integer.x86_64_regs.r10;
2074 to->R11 = from->integer.x86_64_regs.r11;
2075 to->R12 = from->integer.x86_64_regs.r12;
2076 to->R13 = from->integer.x86_64_regs.r13;
2077 to->R14 = from->integer.x86_64_regs.r14;
2078 to->R15 = from->integer.x86_64_regs.r15;
2079 }
2080 if (from->flags & SERVER_CTX_SEGMENTS)
2081 {
2082 to->ContextFlags |= CONTEXT_SEGMENTS;
2083 to->SegDs = from->seg.x86_64_regs.ds;
2084 to->SegEs = from->seg.x86_64_regs.es;
2085 to->SegFs = from->seg.x86_64_regs.fs;
2086 to->SegGs = from->seg.x86_64_regs.gs;
2087 }
2088 if (from->flags & SERVER_CTX_FLOATING_POINT)
2089 {
2090 to->ContextFlags |= CONTEXT_FLOATING_POINT;
2091 memcpy( &to->u.FltSave, from->fp.x86_64_regs.fpregs, sizeof(from->fp.x86_64_regs.fpregs) );
2092 to->MxCsr = to->u.FltSave.MxCsr;
2093 }
2094 if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
2095 {
2096 to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
2097 to->Dr0 = from->debug.x86_64_regs.dr0;
2098 to->Dr1 = from->debug.x86_64_regs.dr1;
2099 to->Dr2 = from->debug.x86_64_regs.dr2;
2100 to->Dr3 = from->debug.x86_64_regs.dr3;
2101 to->Dr6 = from->debug.x86_64_regs.dr6;
2102 to->Dr7 = from->debug.x86_64_regs.dr7;
2103 }
2104 return STATUS_SUCCESS;
2105 }
2106
2107
2108 /***********************************************************************
2109 * NtSetContextThread (NTDLL.@)
2110 * ZwSetContextThread (NTDLL.@)
2111 */
2112 NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
2113 {
2114 NTSTATUS ret = STATUS_SUCCESS;
2115 BOOL self = (handle == GetCurrentThread());
2116
2117 /* debug registers require a server call */
2118 if (self && (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_AMD64)))
2119 self = (amd64_thread_data()->dr0 == context->Dr0 &&
2120 amd64_thread_data()->dr1 == context->Dr1 &&
2121 amd64_thread_data()->dr2 == context->Dr2 &&
2122 amd64_thread_data()->dr3 == context->Dr3 &&
2123 amd64_thread_data()->dr6 == context->Dr6 &&
2124 amd64_thread_data()->dr7 == context->Dr7);
2125
2126 if (!self) ret = set_thread_context( handle, context, &self );
2127
2128 if (self && ret == STATUS_SUCCESS) set_cpu_context( context );
2129 return ret;
2130 }
2131
2132
2133 /***********************************************************************
2134 * NtGetContextThread (NTDLL.@)
2135 * ZwGetContextThread (NTDLL.@)
2136 */
2137 NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
2138 {
2139 NTSTATUS ret;
2140 DWORD needed_flags = context->ContextFlags;
2141 BOOL self = (handle == GetCurrentThread());
2142
2143 /* debug registers require a server call */
2144 if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_AMD64)) self = FALSE;
2145
2146 if (!self)
2147 {
2148 if ((ret = get_thread_context( handle, context, &self ))) return ret;
2149 needed_flags &= ~context->ContextFlags;
2150 }
2151
2152 if (self)
2153 {
2154 if (needed_flags)
2155 {
2156 CONTEXT ctx;
2157 RtlCaptureContext( &ctx );
2158 copy_context( context, &ctx, ctx.ContextFlags & needed_flags );
2159 context->ContextFlags |= ctx.ContextFlags & needed_flags;
2160 }
2161 /* update the cached version of the debug registers */
2162 if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_AMD64))
2163 {
2164 amd64_thread_data()->dr0 = context->Dr0;
2165 amd64_thread_data()->dr1 = context->Dr1;
2166 amd64_thread_data()->dr2 = context->Dr2;
2167 amd64_thread_data()->dr3 = context->Dr3;
2168 amd64_thread_data()->dr6 = context->Dr6;
2169 amd64_thread_data()->dr7 = context->Dr7;
2170 }
2171 }
2172 return STATUS_SUCCESS;
2173 }
2174
2175
2176 extern void raise_func_trampoline( EXCEPTION_RECORD *rec, CONTEXT *context, raise_func func );
2177 __ASM_GLOBAL_FUNC( raise_func_trampoline,
2178 __ASM_CFI(".cfi_signal_frame\n\t")
2179 __ASM_CFI(".cfi_def_cfa %rbp,160\n\t") /* red zone + rip + rbp + rdi + rsi */
2180 __ASM_CFI(".cfi_rel_offset %rip,24\n\t")
2181 __ASM_CFI(".cfi_rel_offset %rbp,16\n\t")
2182 __ASM_CFI(".cfi_rel_offset %rdi,8\n\t")
2183 __ASM_CFI(".cfi_rel_offset %rsi,0\n\t")
2184 "call *%rdx\n\t"
2185 "int $3")
2186
2187 /***********************************************************************
2188 * setup_exception
2189 *
2190 * Setup a proper stack frame for the raise function, and modify the
2191 * sigcontext so that the return from the signal handler will call
2192 * the raise function.
2193 */
2194 static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func )
2195 {
2196 struct stack_layout
2197 {
2198 CONTEXT context;
2199 EXCEPTION_RECORD rec;
2200 ULONG64 rsi;
2201 ULONG64 rdi;
2202 ULONG64 rbp;
2203 ULONG64 rip;
2204 ULONG64 red_zone[16];
2205 } *stack;
2206 ULONG64 *rsp_ptr;
2207 DWORD exception_code = 0;
2208
2209 stack = (struct stack_layout *)(RSP_sig(sigcontext) & ~15);
2210
2211 /* stack sanity checks */
2212
2213 if (is_inside_signal_stack( stack ))
2214 {
2215 ERR( "nested exception on signal stack in thread %04x eip %016lx esp %016lx stack %p-%p\n",
2216 GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext),
2217 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2218 abort_thread(1);
2219 }
2220
2221 if (stack - 1 > stack || /* check for overflow in subtraction */
2222 (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack ||
2223 (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
2224 {
2225 WARN( "exception outside of stack limits in thread %04x eip %016lx esp %016lx stack %p-%p\n",
2226 GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext),
2227 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2228 }
2229 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096)
2230 {
2231 /* stack overflow on last page, unrecoverable */
2232 UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1);
2233 ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
2234 diff, GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext),
2235 (ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
2236 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2237 abort_thread(1);
2238 }
2239 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit)
2240 {
2241 /* stack access below stack limit, may be recoverable */
2242 if (virtual_handle_stack_fault( stack - 1 )) exception_code = EXCEPTION_STACK_OVERFLOW;
2243 else
2244 {
2245 UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1);
2246 ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
2247 diff, GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext),
2248 (ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
2249 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2250 abort_thread(1);
2251 }
2252 }
2253
2254 stack--; /* push the stack_layout structure */
2255 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
2256 VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack));
2257 #elif defined(VALGRIND_MAKE_WRITABLE)
2258 VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack));
2259 #endif
2260 stack->rec.ExceptionRecord = NULL;
2261 stack->rec.ExceptionCode = exception_code;
2262 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
2263 stack->rec.ExceptionAddress = (void *)RIP_sig(sigcontext);
2264 stack->rec.NumberParameters = 0;
2265 save_context( &stack->context, sigcontext );
2266
2267 /* store return address and %rbp without aligning, so that the offset is fixed */
2268 rsp_ptr = (ULONG64 *)RSP_sig(sigcontext) - 16;
2269 *(--rsp_ptr) = RIP_sig(sigcontext);
2270 *(--rsp_ptr) = RBP_sig(sigcontext);
2271 *(--rsp_ptr) = RDI_sig(sigcontext);
2272 *(--rsp_ptr) = RSI_sig(sigcontext);
2273
2274 /* now modify the sigcontext to return to the raise function */
2275 RIP_sig(sigcontext) = (ULONG_PTR)raise_func_trampoline;
2276 RDI_sig(sigcontext) = (ULONG_PTR)&stack->rec;
2277 RSI_sig(sigcontext) = (ULONG_PTR)&stack->context;
2278 RDX_sig(sigcontext) = (ULONG_PTR)func;
2279 RBP_sig(sigcontext) = (ULONG_PTR)rsp_ptr;
2280 RSP_sig(sigcontext) = (ULONG_PTR)stack;
2281 /* clear single-step, direction, and align check flag */
2282 EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
2283
2284 return &stack->rec;
2285 }
2286
2287
2288 /***********************************************************************
2289 * get_exception_context
2290 *
2291 * Get a pointer to the context built by setup_exception.
2292 */
2293 static inline CONTEXT *get_exception_context( EXCEPTION_RECORD *rec )
2294 {
2295 return (CONTEXT *)rec - 1; /* cf. stack_layout structure */
2296 }
2297
2298
2299 /**********************************************************************
2300 * find_function_info
2301 */
2302 static RUNTIME_FUNCTION *find_function_info( ULONG64 pc, HMODULE module,
2303 RUNTIME_FUNCTION *func, ULONG size )
2304 {
2305 int min = 0;
2306 int max = size/sizeof(*func) - 1;
2307
2308 while (min <= max)
2309 {
2310 int pos = (min + max) / 2;
2311 if ((char *)pc < (char *)module + func[pos].BeginAddress) max = pos - 1;
2312 else if ((char *)pc >= (char *)module + func[pos].EndAddress) min = pos + 1;
2313 else
2314 {
2315 func += pos;
2316 while (func->UnwindData & 1) /* follow chained entry */
2317 func = (RUNTIME_FUNCTION *)((char *)module + (func->UnwindData & ~1));
2318 return func;
2319 }
2320 }
2321 return NULL;
2322 }
2323
2324 /**********************************************************************
2325 * lookup_function_info
2326 */
2327 static RUNTIME_FUNCTION *lookup_function_info( ULONG64 pc, ULONG64 *base, LDR_MODULE **module )
2328 {
2329 RUNTIME_FUNCTION *func = NULL;
2330 struct dynamic_unwind_entry *entry;
2331 ULONG size;
2332
2333 /* PE module or wine module */
2334 if (!LdrFindEntryForAddress( (void *)pc, module ))
2335 {
2336 *base = (ULONG64)(*module)->BaseAddress;
2337 if ((func = RtlImageDirectoryEntryToData( (*module)->BaseAddress, TRUE,
2338 IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )))
2339 {
2340 /* lookup in function table */
2341 func = find_function_info( pc, (*module)->BaseAddress, func, size );
2342 }
2343 }
2344 else
2345 {
2346 *module = NULL;
2347
2348 RtlEnterCriticalSection( &dynamic_unwind_section );
2349 LIST_FOR_EACH_ENTRY( entry, &dynamic_unwind_list, struct dynamic_unwind_entry, entry )
2350 {
2351 if (pc >= entry->base && pc < entry->base + entry->size)
2352 {
2353 *base = entry->base;
2354
2355 /* use callback or lookup in function table */
2356 if (entry->callback)
2357 func = entry->callback( pc, entry->context );
2358 else
2359 func = find_function_info( pc, (HMODULE)entry->base, entry->table, entry->table_size );
2360 break;
2361 }
2362 }
2363 RtlLeaveCriticalSection( &dynamic_unwind_section );
2364 }
2365
2366 return func;
2367 }
2368
2369 static DWORD nested_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
2370 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
2371 {
2372 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) return ExceptionContinueSearch;
2373
2374 /* FIXME */
2375 return ExceptionNestedException;
2376 }
2377
2378 /**********************************************************************
2379 * call_handler
2380 *
2381 * Call a single exception handler.
2382 * FIXME: Handle nested exceptions.
2383 */
2384 static DWORD call_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch )
2385 {
2386 EXCEPTION_REGISTRATION_RECORD frame;
2387 DWORD res;
2388
2389 frame.Handler = nested_exception_handler;
2390 __wine_push_frame( &frame );
2391
2392 TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
2393 dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
2394 res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, context, dispatch );
2395 TRACE( "handler at %p returned %u\n", dispatch->LanguageHandler, res );
2396
2397 __wine_pop_frame( &frame );
2398 return res;
2399 }
2400
2401
2402 /**********************************************************************
2403 * call_teb_handler
2404 *
2405 * Call a single exception handler from the TEB chain.
2406 * FIXME: Handle nested exceptions.
2407 */
2408 static DWORD call_teb_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch,
2409 EXCEPTION_REGISTRATION_RECORD *teb_frame )
2410 {
2411 DWORD res;
2412
2413 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
2414 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
2415 res = teb_frame->Handler( rec, teb_frame, context, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
2416 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
2417 return res;
2418 }
2419
2420
2421 /**********************************************************************
2422 * call_stack_handlers
2423 *
2424 * Call the stack handlers chain.
2425 */
2426 static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *orig_context )
2427 {
2428 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
2429 UNWIND_HISTORY_TABLE table;
2430 DISPATCHER_CONTEXT dispatch;
2431 CONTEXT context;
2432 LDR_MODULE *module;
2433 NTSTATUS status;
2434
2435 context = *orig_context;
2436 dispatch.TargetIp = 0;
2437 dispatch.ContextRecord = &context;
2438 dispatch.HistoryTable = &table;
2439 for (;;)
2440 {
2441 /* FIXME: should use the history table to make things faster */
2442
2443 dispatch.ImageBase = 0;
2444 dispatch.ControlPc = context.Rip;
2445 dispatch.ScopeIndex = 0;
2446
2447 /* first look for PE exception information */
2448
2449 if ((dispatch.FunctionEntry = lookup_function_info( dispatch.ControlPc, &dispatch.ImageBase, &module )))
2450 {
2451 dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_EHANDLER, dispatch.ImageBase,
2452 dispatch.ControlPc, dispatch.FunctionEntry,
2453 &context, &dispatch.HandlerData,
2454 &dispatch.EstablisherFrame, NULL );
2455 goto unwind_done;
2456 }
2457
2458 /* then look for host system exception information */
2459
2460 if (!module || (module->Flags & LDR_WINE_INTERNAL))
2461 {
2462 BOOL got_info = FALSE;
2463 struct dwarf_eh_bases bases;
2464 const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(dispatch.ControlPc - 1), &bases );
2465
2466 if (fde)
2467 {
2468 status = dwarf_virtual_unwind( dispatch.ControlPc, &dispatch.EstablisherFrame, &context,
2469 fde, &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
2470 if (status != STATUS_SUCCESS) return status;
2471 got_info = TRUE;
2472 }
2473 #ifdef HAVE_LIBUNWIND_H
2474 else
2475 {
2476 status = libunwind_virtual_unwind( dispatch.ControlPc, &got_info, &dispatch.EstablisherFrame, &context,
2477 &dispatch.LanguageHandler, &dispatch.HandlerData );
2478 if (status != STATUS_SUCCESS) return status;
2479 }
2480 #endif
2481
2482 if (got_info)
2483 {
2484 dispatch.FunctionEntry = NULL;
2485 if (dispatch.LanguageHandler && !module)
2486 {
2487 FIXME( "calling personality routine in system library not supported yet\n" );
2488 dispatch.LanguageHandler = NULL;
2489 }
2490 goto unwind_done;
2491 }
2492 }
2493 else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
2494
2495 context.Rip = *(ULONG64 *)context.Rsp;
2496 context.Rsp = context.Rsp + sizeof(ULONG64);
2497 dispatch.EstablisherFrame = context.Rsp;
2498 dispatch.LanguageHandler = NULL;
2499
2500 unwind_done:
2501 if (!dispatch.EstablisherFrame) break;
2502
2503 if ((dispatch.EstablisherFrame & 7) ||
2504 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
2505 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
2506 {
2507 ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
2508 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2509 rec->ExceptionFlags |= EH_STACK_INVALID;
2510 break;
2511 }
2512
2513 if (dispatch.LanguageHandler)
2514 {
2515 switch (call_handler( rec, orig_context, &dispatch ))
2516 {
2517 case ExceptionContinueExecution:
2518 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
2519 return STATUS_SUCCESS;
2520 case ExceptionContinueSearch:
2521 break;
2522 case ExceptionNestedException:
2523 FIXME( "nested exception\n" );
2524 break;
2525 case ExceptionCollidedUnwind: {
2526 ULONG64 frame;
2527
2528 context = *dispatch.ContextRecord;
2529 dispatch.ContextRecord = &context;
2530 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
2531 dispatch.ControlPc, dispatch.FunctionEntry,
2532 &context, NULL, &frame, NULL );
2533 goto unwind_done;
2534 }
2535 default:
2536 return STATUS_INVALID_DISPOSITION;
2537 }
2538 }
2539 /* hack: call wine handlers registered in the tib list */
2540 else while ((ULONG64)teb_frame < context.Rsp)
2541 {
2542 TRACE( "found wine frame %p rsp %lx handler %p\n",
2543 teb_frame, context.Rsp, teb_frame->Handler );
2544 dispatch.EstablisherFrame = (ULONG64)teb_frame;
2545 switch (call_teb_handler( rec, orig_context, &dispatch, teb_frame ))
2546 {
2547 case ExceptionContinueExecution:
2548 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
2549 return STATUS_SUCCESS;
2550 case ExceptionContinueSearch:
2551 break;
2552 case ExceptionNestedException:
2553 FIXME( "nested exception\n" );
2554 break;
2555 case ExceptionCollidedUnwind: {
2556 ULONG64 frame;
2557
2558 context = *dispatch.ContextRecord;
2559 dispatch.ContextRecord = &context;
2560 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
2561 dispatch.ControlPc, dispatch.FunctionEntry,
2562 &context, NULL, &frame, NULL );
2563 teb_frame = teb_frame->Prev;
2564 goto unwind_done;
2565 }
2566 default:
2567 return STATUS_INVALID_DISPOSITION;
2568 }
2569 teb_frame = teb_frame->Prev;
2570 }
2571
2572 if (context.Rsp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break;
2573 }
2574 return STATUS_UNHANDLED_EXCEPTION;
2575 }
2576
2577
2578 /*******************************************************************
2579 * NtRaiseException (NTDLL.@)
2580 */
2581 NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
2582 {
2583 NTSTATUS status;
2584
2585 if (first_chance)
2586 {
2587 DWORD c;
2588
2589 TRACE( "code=%x flags=%x addr=%p ip=%lx tid=%04x\n",
2590 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
2591 context->Rip, GetCurrentThreadId() );
2592 for (c = 0; c < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); c++)
2593 TRACE( " info[%d]=%016lx\n", c, rec->ExceptionInformation[c] );
2594 if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
2595 {
2596 if (rec->ExceptionInformation[1] >> 16)
2597 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
2598 rec->ExceptionAddress,
2599 (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
2600 else
2601 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
2602 rec->ExceptionAddress,
2603 (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
2604 }
2605 else
2606 {
2607 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
2608 context->Rax, context->Rbx, context->Rcx, context->Rdx );
2609 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
2610 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
2611 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
2612 context->R8, context->R9, context->R10, context->R11 );
2613 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
2614 context->R12, context->R13, context->R14, context->R15 );
2615 }
2616 status = send_debug_event( rec, TRUE, context );
2617 if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED) goto done;
2618
2619 /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
2620 if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Rip--;
2621
2622 if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION) goto done;
2623
2624 if ((status = call_stack_handlers( rec, context )) == STATUS_SUCCESS) goto done;
2625 if (status != STATUS_UNHANDLED_EXCEPTION) return status;
2626 }
2627
2628 /* last chance exception */
2629
2630 status = send_debug_event( rec, FALSE, context );
2631 if (status != DBG_CONTINUE)
2632 {
2633 if (rec->ExceptionFlags & EH_STACK_INVALID)
2634 ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
2635 else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
2636 ERR("Process attempted to continue execution after noncontinuable exception.\n");
2637 else
2638 ERR("Unhandled exception code %x flags %x addr %p\n",
2639 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
2640 NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
2641 }
2642
2643 done:
2644 return NtSetContextThread( GetCurrentThread(), context );
2645 }
2646
2647
2648 /**********************************************************************
2649 * raise_segv_exception
2650 */
2651 static void raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2652 {
2653 NTSTATUS status;
2654
2655 switch(rec->ExceptionCode)
2656 {
2657 case EXCEPTION_ACCESS_VIOLATION:
2658 if (rec->NumberParameters == 2)
2659 {
2660 if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
2661 rec->ExceptionInformation[0], FALSE )))
2662 set_cpu_context( context );
2663 }
2664 break;
2665 case EXCEPTION_BREAKPOINT:
2666 switch (rec->ExceptionInformation[0])
2667 {
2668 case 1: /* BREAKPOINT_PRINT */
2669 case 3: /* BREAKPOINT_LOAD_SYMBOLS */
2670 case 4: /* BREAKPOINT_UNLOAD_SYMBOLS */
2671 case 5: /* BREAKPOINT_COMMAND_STRING (>= Win2003) */
2672 set_cpu_context( context );
2673 }
2674 break;
2675 }
2676 status = NtRaiseException( rec, context, TRUE );
2677 raise_status( status, rec );
2678 }
2679
2680
2681 /**********************************************************************
2682 * raise_trap_exception
2683 */
2684 static void raise_trap_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2685 {
2686 NTSTATUS status;
2687
2688 if (rec->ExceptionCode == EXCEPTION_SINGLE_STEP)
2689 {
2690 /* when single stepping can't tell whether this is a hw bp or a
2691 * single step interrupt. try to avoid as much overhead as possible
2692 * and only do a server call if there is any hw bp enabled. */
2693
2694 if( !(context->EFlags & 0x100) || (amd64_thread_data()->dr7 & 0xff) )
2695 {
2696 /* (possible) hardware breakpoint, fetch the debug registers */
2697 DWORD saved_flags = context->ContextFlags;
2698 context->ContextFlags = CONTEXT_DEBUG_REGISTERS;
2699 NtGetContextThread(GetCurrentThread(), context);
2700 context->ContextFlags |= saved_flags; /* restore flags */
2701 }
2702
2703 context->EFlags &= ~0x100; /* clear single-step flag */
2704 }
2705
2706 status = NtRaiseException( rec, context, TRUE );
2707 raise_status( status, rec );
2708 }
2709
2710
2711 /**********************************************************************
2712 * raise_generic_exception
2713 *
2714 * Generic raise function for exceptions that don't need special treatment.
2715 */
2716 static void raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2717 {
2718 NTSTATUS status = NtRaiseException( rec, context, TRUE );
2719 raise_status( status, rec );
2720 }
2721
2722
2723 /***********************************************************************
2724 * is_privileged_instr
2725 *
2726 * Check if the fault location is a privileged instruction.
2727 */
2728 static inline DWORD is_privileged_instr( CONTEXT *context )
2729 {
2730 const BYTE *instr = (BYTE *)context->Rip;
2731 unsigned int prefix_count = 0;
2732
2733 for (;;) switch(*instr)
2734 {
2735 /* instruction prefixes */
2736 case 0x2e: /* %cs: */
2737 case 0x36: /* %ss: */
2738 case 0x3e: /* %ds: */
2739 case 0x26: /* %es: */
2740 case 0x40: /* rex */
2741 case 0x41: /* rex */
2742 case 0x42: /* rex */
2743 case 0x43: /* rex */
2744 case 0x44: /* rex */
2745 case 0x45: /* rex */
2746 case 0x46: /* rex */
2747 case 0x47: /* rex */
2748 case 0x48: /* rex */
2749 case 0x49: /* rex */
2750 case 0x4a: /* rex */
2751 case 0x4b: /* rex */
2752 case 0x4c: /* rex */
2753 case 0x4d: /* rex */
2754 case 0x4e: /* rex */
2755 case 0x4f: /* rex */
2756 case 0x64: /* %fs: */
2757 case 0x65: /* %gs: */
2758 case 0x66: /* opcode size */
2759 case 0x67: /* addr size */
2760 case 0xf0: /* lock */
2761 case 0xf2: /* repne */
2762 case 0xf3: /* repe */
2763 if (++prefix_count >= 15) return EXCEPTION_ILLEGAL_INSTRUCTION;
2764 instr++;
2765 continue;
2766
2767 case 0x0f: /* extended instruction */
2768 switch(instr[1])
2769 {
2770 case 0x06: /* clts */
2771 case 0x08: /* invd */
2772 case 0x09: /* wbinvd */
2773 case 0x20: /* mov crX, reg */
2774 case 0x21: /* mov drX, reg */
2775 case 0x22: /* mov reg, crX */
2776 case 0x23: /* mov reg drX */
2777 return EXCEPTION_PRIV_INSTRUCTION;
2778 }
2779 return 0;
2780 case 0x6c: /* insb (%dx) */
2781 case 0x6d: /* insl (%dx) */
2782 case 0x6e: /* outsb (%dx) */
2783 case 0x6f: /* outsl (%dx) */
2784 case 0xcd: /* int $xx */
2785 case 0xe4: /* inb al,XX */
2786 case 0xe5: /* in (e)ax,XX */
2787 case 0xe6: /* outb XX,al */
2788 case 0xe7: /* out XX,(e)ax */
2789 case 0xec: /* inb (%dx),%al */
2790 case 0xed: /* inl (%dx),%eax */
2791 case 0xee: /* outb %al,(%dx) */
2792 case 0xef: /* outl %eax,(%dx) */
2793 case 0xf4: /* hlt */
2794 case 0xfa: /* cli */
2795 case 0xfb: /* sti */
2796 return EXCEPTION_PRIV_INSTRUCTION;
2797 default:
2798 return 0;
2799 }
2800 }
2801
2802
2803 /***********************************************************************
2804 * handle_interrupt
2805 *
2806 * Handle an interrupt.
2807 */
2808 static inline BOOL handle_interrupt( unsigned int interrupt, EXCEPTION_RECORD *rec, CONTEXT *context )
2809 {
2810 switch(interrupt)
2811 {
2812 case 0x2c:
2813 rec->ExceptionCode = STATUS_ASSERTION_FAILURE;
2814 return TRUE;
2815 case 0x2d:
2816 context->Rip += 3;
2817 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
2818 rec->ExceptionAddress = (void *)context->Rip;
2819 rec->NumberParameters = 1;
2820 rec->ExceptionInformation[0] = context->Rax;
2821 return TRUE;
2822 default:
2823 return FALSE;
2824 }
2825 }
2826
2827
2828 /**********************************************************************
2829 * segv_handler
2830 *
2831 * Handler for SIGSEGV and related errors.
2832 */
2833 static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2834 {
2835 EXCEPTION_RECORD *rec;
2836 ucontext_t *ucontext = sigcontext;
2837
2838 /* check for page fault inside the thread stack */
2839 if (TRAP_sig(ucontext) == TRAP_x86_PAGEFLT &&
2840 (char *)siginfo->si_addr >= (char *)NtCurrentTeb()->DeallocationStack &&
2841 (char *)siginfo->si_addr < (char *)NtCurrentTeb()->Tib.StackBase &&
2842 virtual_handle_stack_fault( siginfo->si_addr ))
2843 {
2844 /* check if this was the last guard page */
2845 if ((char *)siginfo->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096)
2846 {
2847 rec = setup_exception( sigcontext, raise_segv_exception );
2848 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2849 }
2850 return;
2851 }
2852
2853 rec = setup_exception( sigcontext, raise_segv_exception );
2854 if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return;
2855
2856 switch(TRAP_sig(ucontext))
2857 {
2858 case TRAP_x86_OFLOW: /* Overflow exception */
2859 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2860 break;
2861 case TRAP_x86_BOUND: /* Bound range exception */
2862 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2863 break;
2864 case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
2865 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2866 break;
2867 case TRAP_x86_STKFLT: /* Stack fault */
2868 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2869 break;
2870 case TRAP_x86_SEGNPFLT: /* Segment not present exception */
2871 case TRAP_x86_PROTFLT: /* General protection fault */
2872 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2873 {
2874 CONTEXT *win_context = get_exception_context( rec );
2875 WORD err = ERROR_sig(ucontext);
2876 if (!err && (rec->ExceptionCode = is_privileged_instr( win_context ))) break;
2877 if ((err & 7) == 2 && handle_interrupt( err >> 3, rec, win_context )) break;
2878 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2879 rec->NumberParameters = 2;
2880 rec->ExceptionInformation[0] = 0;
2881 rec->ExceptionInformation[1] = 0xffffffffffffffff;
2882 }
2883 break;
2884 case TRAP_x86_PAGEFLT: /* Page fault */
2885 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2886 rec->NumberParameters = 2;
2887 rec->ExceptionInformation[0] = (ERROR_sig(ucontext) >> 1) & 0x09;
2888 rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
2889 break;
2890 case TRAP_x86_ALIGNFLT: /* Alignment check exception */
2891 rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
2892 break;
2893 default:
2894 ERR( "Got unexpected trap %ld\n", (ULONG_PTR)TRAP_sig(ucontext) );
2895 /* fall through */
2896 case TRAP_x86_NMI: /* NMI interrupt */
2897 case TRAP_x86_DNA: /* Device not available exception */
2898 case TRAP_x86_DOUBLEFLT: /* Double fault exception */
2899 case TRAP_x86_TSSFLT: /* Invalid TSS exception */
2900 case TRAP_x86_MCHK: /* Machine check exception */
2901 case TRAP_x86_CACHEFLT: /* Cache flush exception */
2902 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2903 break;
2904 }
2905 }
2906
2907 /**********************************************************************
2908 * trap_handler
2909 *
2910 * Handler for SIGTRAP.
2911 */
2912 static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2913 {
2914 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_trap_exception );
2915
2916 switch (siginfo->si_code)
2917 {
2918 case TRAP_TRACE: /* Single-step exception */
2919 case 4 /* TRAP_HWBKPT */: /* Hardware breakpoint exception */
2920 rec->ExceptionCode = EXCEPTION_SINGLE_STEP;
2921 break;
2922 case TRAP_BRKPT: /* Breakpoint exception */
2923 /* Check if this is actuallly icebp instruction */
2924 if (((unsigned char *)rec->ExceptionAddress)[-1] == 0xF1)
2925 {
2926 rec->ExceptionCode = EXCEPTION_SINGLE_STEP;
2927 break;
2928 }
2929 rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */
2930 /* fall through */
2931 default:
2932 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
2933 rec->NumberParameters = 1;
2934 rec->ExceptionInformation[0] = 0;
2935 break;
2936 }
2937 }
2938
2939 /**********************************************************************
2940 * fpe_handler
2941 *
2942 * Handler for SIGFPE.
2943 */
2944 static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2945 {
2946 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2947
2948 switch (siginfo->si_code)
2949 {
2950 case FPE_FLTSUB:
2951 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2952 break;
2953 case FPE_INTDIV:
2954 rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
2955 break;
2956 case FPE_INTOVF:
2957 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2958 break;
2959 case FPE_FLTDIV:
2960 rec->ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
2961 break;
2962 case FPE_FLTOVF:
2963 rec->ExceptionCode = EXCEPTION_FLT_OVERFLOW;
2964 break;
2965 case FPE_FLTUND:
2966 rec->ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
2967 break;
2968 case FPE_FLTRES:
2969 rec->ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
2970 break;
2971 case FPE_FLTINV:
2972 default:
2973 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2974 break;
2975 }
2976 }
2977
2978 /**********************************************************************
2979 * int_handler
2980 *
2981 * Handler for SIGINT.
2982 */
2983 static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2984 {
2985 if (!dispatch_signal(SIGINT))
2986 {
2987 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2988 rec->ExceptionCode = CONTROL_C_EXIT;
2989 }
2990 }
2991
2992
2993 /**********************************************************************
2994 * abrt_handler
2995 *
2996 * Handler for SIGABRT.
2997 */
2998 static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2999 {
3000 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
3001 rec->ExceptionCode = EXCEPTION_WINE_ASSERTION;
3002 rec->ExceptionFlags = EH_NONCONTINUABLE;
3003 }
3004
3005
3006 /**********************************************************************
3007 * quit_handler
3008 *
3009 * Handler for SIGQUIT.
3010 */
3011 static void quit_handler( int signal, siginfo_t *siginfo, void *ucontext )
3012 {
3013 abort_thread(0);
3014 }
3015
3016
3017 /**********************************************************************
3018 * usr1_handler
3019 *
3020 * Handler for SIGUSR1, used to signal a thread that it got suspended.
3021 */
3022 static void usr1_handler( int signal, siginfo_t *siginfo, void *ucontext )
3023 {
3024 CONTEXT context;
3025
3026 save_context( &context, ucontext );
3027 wait_suspend( &context );
3028 restore_context( &context, ucontext );
3029 }
3030
3031
3032 /***********************************************************************
3033 * __wine_set_signal_handler (NTDLL.@)
3034 */
3035 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
3036 {
3037 if (sig >= sizeof(handlers) / sizeof(handlers[0])) return -1;
3038 if (handlers[sig] != NULL) return -2;
3039 handlers[sig] = wsh;
3040 return 0;
3041 }
3042
3043
3044 /**********************************************************************
3045 * signal_alloc_thread
3046 */
3047 NTSTATUS signal_alloc_thread( TEB **teb )
3048 {
3049 static size_t sigstack_zero_bits;
3050 SIZE_T size;
3051 NTSTATUS status;
3052
3053 if (!sigstack_zero_bits)
3054 {
3055 size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
3056 /* find the first power of two not smaller than min_size */
3057 sigstack_zero_bits = 12;
3058 while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
3059 signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
3060 assert( sizeof(TEB) <= teb_size );
3061 }
3062
3063 size = 1 << sigstack_zero_bits;
3064 *teb = NULL;
3065 if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
3066 &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
3067 {
3068 (*teb)->Tib.Self = &(*teb)->Tib;
3069 (*teb)->Tib.ExceptionList = (void *)~0UL;
3070 }
3071 return status;
3072 }
3073
3074
3075 /**********************************************************************
3076 * signal_free_thread
3077 */
3078 void signal_free_thread( TEB *teb )
3079 {
3080 SIZE_T size = 0;
3081
3082 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
3083 }
3084
3085 #ifdef __APPLE__
3086 /**********************************************************************
3087 * mac_thread_gsbase
3088 */
3089 static void *mac_thread_gsbase(void)
3090 {
3091 static int gsbase_offset = -1;
3092 void *ret;
3093
3094 if (gsbase_offset < 0)
3095 {
3096 /* Search for the array of TLS slots within the pthread data structure.
3097 That's what the macOS pthread implementation uses for gsbase. */
3098 const void* const sentinel1 = (const void*)0x2bffb6b4f11228ae;
3099 const void* const sentinel2 = (const void*)0x0845a7ff6ab76707;
3100 int rc;
3101 pthread_key_t key;
3102 const void** p = (const void**)pthread_self();
3103 int i;
3104
3105 gsbase_offset = 0;
3106 if ((rc = pthread_key_create(&key, NULL)))
3107 {
3108 ERR("failed to create sentinel key for gsbase search: %d\n", rc);
3109 return NULL;
3110 }
3111
3112 pthread_setspecific(key, sentinel1);
3113
3114 for (i = key + 1; i < 2000; i++) /* arbitrary limit */
3115 {
3116 if (p[i] == sentinel1)
3117 {
3118 pthread_setspecific(key, sentinel2);
3119
3120 if (p[i] == sentinel2)
3121 {
3122 gsbase_offset = (i - key) * sizeof(*p);
3123 break;
3124 }
3125
3126 pthread_setspecific(key, sentinel1);
3127 }
3128 }
3129
3130 pthread_key_delete(key);
3131 }
3132
3133 if (gsbase_offset)
3134 {
3135 ret = (char*)pthread_self() + gsbase_offset;
3136 TRACE("pthread_self() %p + offset 0x%08x -> gsbase %p\n", pthread_self(), gsbase_offset, ret);
3137 }
3138 else
3139 {
3140 ret = NULL;
3141 ERR("failed to locate gsbase; won't be able to poke ThreadLocalStoragePointer into pthread TLS; expect crashes\n");
3142 }
3143
3144 return ret;
3145 }
3146 #endif
3147
3148
3149 /**********************************************************************
3150 * signal_init_thread
3151 */
3152 void signal_init_thread( TEB *teb )
3153 {
3154 const WORD fpu_cw = 0x27f;
3155 stack_t ss;
3156
3157 #if defined __linux__
3158 arch_prctl( ARCH_SET_GS, teb );
3159 #elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
3160 amd64_set_gsbase( teb );
3161 #elif defined(__NetBSD__)
3162 sysarch( X86_64_SET_GSBASE, &teb );
3163 #elif defined (__APPLE__)
3164 __asm__ volatile (".byte 0x65\n\tmovq %0,%c1"
3165 :
3166 : "r" (teb->Tib.Self), "n" (FIELD_OFFSET(TEB, Tib.Self)));
3167 __asm__ volatile (".byte 0x65\n\tmovq %0,%c1"
3168 :
3169 : "r" (teb->ThreadLocalStoragePointer), "n" (FIELD_OFFSET(TEB, ThreadLocalStoragePointer)));
3170
3171 /* alloc_tls_slot() needs to poke a value to an address relative to each
3172 thread's gsbase. Have each thread record its gsbase pointer into its
3173 TEB so alloc_tls_slot() can find it. */
3174 teb->Reserved5[0] = mac_thread_gsbase();
3175 #else
3176 # error Please define setting %gs for your architecture
3177 #endif
3178
3179 ss.ss_sp = (char *)teb + teb_size;
3180 ss.ss_size = signal_stack_size;
3181 ss.ss_flags = 0;
3182 if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
3183
3184 #ifdef __GNUC__
3185 __asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
3186 #else
3187 FIXME("FPU setup not implemented for this platform.\n");
3188 #endif
3189 }
3190
3191 /**********************************************************************
3192 * signal_init_process
3193 */
3194 void signal_init_process(void)
3195 {
3196 struct sigaction sig_act;
3197
3198 sig_act.sa_mask = server_block_set;
3199 sig_act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
3200
3201 sig_act.sa_sigaction = int_handler;
3202 if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
3203 sig_act.sa_sigaction = fpe_handler;
3204 if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
3205 sig_act.sa_sigaction = abrt_handler;
3206 if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
3207 sig_act.sa_sigaction = quit_handler;
3208 if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
3209 sig_act.sa_sigaction = usr1_handler;
3210 if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
3211
3212 sig_act.sa_sigaction = segv_handler;
3213 if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
3214 if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
3215 #ifdef SIGBUS
3216 if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
3217 #endif
3218
3219 #ifdef SIGTRAP
3220 sig_act.sa_sigaction = trap_handler;
3221 if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
3222 #endif
3223 return;
3224
3225 error:
3226 perror("sigaction");
3227 exit(1);
3228 }
3229
3230
3231 /**********************************************************************
3232 * RtlAddFunctionTable (NTDLL.@)
3233 */
3234 BOOLEAN CDECL RtlAddFunctionTable( RUNTIME_FUNCTION *table, DWORD count, DWORD64 addr )
3235 {
3236 struct dynamic_unwind_entry *entry;
3237
3238 TRACE( "%p %u %lx\n", table, count, addr );
3239
3240 /* NOTE: Windows doesn't check if table is aligned or a NULL pointer */
3241
3242 entry = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*entry) );
3243 if (!entry)
3244 return FALSE;
3245
3246 entry->base = addr;
3247 entry->size = table[count - 1].EndAddress;
3248 entry->table = table;
3249 entry->table_size = count * sizeof(RUNTIME_FUNCTION);
3250 entry->callback = NULL;
3251 entry->context = NULL;
3252
3253 RtlEnterCriticalSection( &dynamic_unwind_section );
3254 list_add_tail( &dynamic_unwind_list, &entry->entry );
3255 RtlLeaveCriticalSection( &dynamic_unwind_section );
3256
3257 return TRUE;
3258 }
3259
3260
3261 /**********************************************************************
3262 * RtlInstallFunctionTableCallback (NTDLL.@)
3263 */
3264 BOOLEAN CDECL RtlInstallFunctionTableCallback( DWORD64 table, DWORD64 base, DWORD length,
3265 PGET_RUNTIME_FUNCTION_CALLBACK callback, PVOID context, PCWSTR dll )
3266 {
3267 struct dynamic_unwind_entry *entry;
3268
3269 TRACE( "%lx %lx %d %p %p %s\n", table, base, length, callback, context, wine_dbgstr_w(dll) );
3270
3271 /* NOTE: Windows doesn't check if the provided callback is a NULL pointer */
3272
3273 /* both low-order bits must be set */
3274 if ((table & 0x3) != 0x3)
3275 return FALSE;
3276
3277 entry = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*entry) );
3278 if (!entry)
3279 return FALSE;
3280
3281 entry->base = base;
3282 entry->size = length;
3283 entry->table = (RUNTIME_FUNCTION *)table;
3284 entry->table_size = 0;
3285 entry->callback = callback;
3286 entry->context = context;
3287
3288 RtlEnterCriticalSection( &dynamic_unwind_section );
3289 list_add_tail( &dynamic_unwind_list, &entry->entry );
3290 RtlLeaveCriticalSection( &dynamic_unwind_section );
3291
3292 return TRUE;
3293 }
3294
3295
3296 /**********************************************************************
3297 * RtlDeleteFunctionTable (NTDLL.@)
3298 */
3299 BOOLEAN CDECL RtlDeleteFunctionTable( RUNTIME_FUNCTION *table )
3300 {
3301 struct dynamic_unwind_entry *entry, *to_free = NULL;
3302
3303 TRACE( "%p\n", table );
3304
3305 RtlEnterCriticalSection( &dynamic_unwind_section );
3306 LIST_FOR_EACH_ENTRY( entry, &dynamic_unwind_list, struct dynamic_unwind_entry, entry )
3307 {
3308 if (entry->table == table)
3309 {
3310 to_free = entry;
3311 list_remove( &entry->entry );
3312 break;
3313 }
3314 }
3315 RtlLeaveCriticalSection( &dynamic_unwind_section );
3316
3317 if (!to_free)
3318 return FALSE;
3319
3320 RtlFreeHeap( GetProcessHeap(), 0, to_free );
3321 return TRUE;
3322 }
3323
3324
3325 /**********************************************************************
3326 * RtlLookupFunctionEntry (NTDLL.@)
3327 */
3328 PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry( ULONG64 pc, ULONG64 *base, UNWIND_HISTORY_TABLE *table )
3329 {
3330 LDR_MODULE *module;
3331 RUNTIME_FUNCTION *func;
3332
3333 /* FIXME: should use the history table to make things faster */
3334
3335 func = lookup_function_info( pc, base, &module );
3336 if (!func)
3337 {
3338 *base = 0;
3339 if (module)
3340 WARN( "no exception table found in module %p pc %lx\n", module->BaseAddress, pc );
3341 else
3342 WARN( "module not found for %lx\n", pc );
3343 }
3344
3345 return func;
3346 }
3347
3348 static ULONG64 get_int_reg( CONTEXT *context, int reg )
3349 {
3350 return *(&context->Rax + reg);
3351 }
3352
3353 static void set_int_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, ULONG64 *val )
3354 {
3355 *(&context->Rax + reg) = *val;
3356 if (ctx_ptr) ctx_ptr->u2.IntegerContext[reg] = val;
3357 }
3358
3359 static void set_float_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, M128A *val )
3360 {
3361 *(&context->u.s.Xmm0 + reg) = *val;
3362 if (ctx_ptr) ctx_ptr->u.FloatingContext[reg] = val;
3363 }
3364
3365 static int get_opcode_size( struct opcode op )
3366 {
3367 switch (op.code)
3368 {
3369 case UWOP_ALLOC_LARGE:
3370 return 2 + (op.info != 0);
3371 case UWOP_SAVE_NONVOL:
3372 case UWOP_SAVE_XMM128:
3373 return 2;
3374 case UWOP_SAVE_NONVOL_FAR:
3375 case UWOP_SAVE_XMM128_FAR:
3376 return 3;
3377 default:
3378 return 1;
3379 }
3380 }
3381
3382 static BOOL is_inside_epilog( BYTE *pc, ULONG64 base, const RUNTIME_FUNCTION *function )
3383 {
3384 /* add or lea must be the first instruction, and it must have a rex.W prefix */
3385 if ((pc[0] & 0xf8) == 0x48)
3386 {
3387 switch (pc[1])
3388 {
3389 case 0x81: /* add $nnnn,%rsp */
3390 if (pc[0] == 0x48 && pc[2] == 0xc4)
3391 {
3392 pc += 7;
3393 break;
3394 }
3395 return FALSE;
3396 case 0x83: /* add $n,%rsp */
3397 if (pc[0] == 0x48 && pc[2] == 0xc4)
3398 {
3399 pc += 4;
3400 break;
3401 }
3402 return FALSE;
3403 case 0x8d: /* lea n(reg),%rsp */
3404 if (pc[0] & 0x06) return FALSE; /* rex.RX must be cleared */
3405 if (((pc[2] >> 3) & 7) != 4) return FALSE; /* dest reg mus be %rsp */
3406 if ((pc[2] & 7) == 4) return FALSE; /* no SIB byte allowed */
3407 if ((pc[2] >> 6) == 1) /* 8-bit offset */
3408 {
3409 pc += 4;
3410 break;
3411 }
3412 if ((pc[2] >> 6) == 2) /* 32-bit offset */
3413 {
3414 pc += 7;
3415 break;
3416 }
3417 return FALSE;
3418 }
3419 }
3420
3421 /* now check for various pop instructions */
3422
3423 for (;;)
3424 {
3425 if ((*pc & 0xf0) == 0x40) pc++; /* rex prefix */
3426
3427 switch (*pc)
3428 {
3429 case 0x58: /* pop %rax/%r8 */
3430 case 0x59: /* pop %rcx/%r9 */
3431 case 0x5a: /* pop %rdx/%r10 */
3432 case 0x5b: /* pop %rbx/%r11 */
3433 case 0x5c: /* pop %rsp/%r12 */
3434 case 0x5d: /* pop %rbp/%r13 */
3435 case 0x5e: /* pop %rsi/%r14 */
3436 case 0x5f: /* pop %rdi/%r15 */
3437 pc++;
3438 continue;
3439 case 0xc2: /* ret $nn */
3440 case 0xc3: /* ret */
3441 return TRUE;
3442 case 0xe9: /* jmp nnnn */
3443 pc += 5 + *(LONG *)(pc + 1);
3444 if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress)
3445 continue;
3446 break;
3447 case 0xeb: /* jmp n */
3448 pc += 2 + (signed char)pc[1];
3449 if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress)
3450 continue;
3451 break;
3452 case 0xf3: /* rep; ret (for amd64 prediction bug) */
3453 return pc[1] == 0xc3;
3454 }
3455 return FALSE;
3456 }
3457 }
3458
3459 /* execute a function epilog, which must have been validated with is_inside_epilog() */
3460 static void interpret_epilog( BYTE *pc, CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
3461 {
3462 for (;;)
3463 {
3464 BYTE rex = 0;
3465
3466 if ((*pc & 0xf0) == 0x40) rex = *pc++ & 0x0f; /* rex prefix */
3467
3468 switch (*pc)
3469 {
3470 case 0x58: /* pop %rax/r8 */
3471 case 0x59: /* pop %rcx/r9 */
3472 case 0x5a: /* pop %rdx/r10 */
3473 case 0x5b: /* pop %rbx/r11 */
3474 case 0x5c: /* pop %rsp/r12 */
3475 case 0x5d: /* pop %rbp/r13 */
3476 case 0x5e: /* pop %rsi/r14 */
3477 case 0x5f: /* pop %rdi/r15 */
3478 set_int_reg( context, ctx_ptr, *pc - 0x58 + (rex & 1) * 8, (ULONG64 *)context->Rsp );
3479 context->Rsp += sizeof(ULONG64);
3480 pc++;
3481 continue;
3482 case 0x81: /* add $nnnn,%rsp */
3483 context->Rsp += *(LONG *)(pc + 2);
3484 pc += 2 + sizeof(LONG);
3485 continue;
3486 case 0x83: /* add $n,%rsp */
3487 context->Rsp += (signed char)pc[2];
3488 pc += 3;
3489 continue;
3490 case 0x8d:
3491 if ((pc[1] >> 6) == 1) /* lea n(reg),%rsp */
3492 {
3493 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + (signed char)pc[2];
3494 pc += 3;
3495 }
3496 else /* lea nnnn(reg),%rsp */
3497 {
3498 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + *(LONG *)(pc + 2);
3499 pc += 2 + sizeof(LONG);
3500 }
3501 continue;
3502 case 0xc2: /* ret $nn */
3503 context->Rip = *(ULONG64 *)context->Rsp;
3504 context->Rsp += sizeof(ULONG64) + *(WORD *)(pc + 1);
3505 return;
3506 case 0xc3: /* ret */
3507 case 0xf3: /* rep; ret */
3508 context->Rip = *(ULONG64 *)context->Rsp;
3509 context->Rsp += sizeof(ULONG64);
3510 return;
3511 case 0xe9: /* jmp nnnn */
3512 pc += 5 + *(LONG *)(pc + 1);
3513 continue;
3514 case 0xeb: /* jmp n */
3515 pc += 2 + (signed char)pc[1];
3516 continue;
3517 }
3518 return;
3519 }
3520 }
3521
3522 /**********************************************************************
3523 * RtlVirtualUnwind (NTDLL.@)
3524 */
3525 PVOID WINAPI RtlVirtualUnwind( ULONG type, ULONG64 base, ULONG64 pc,
3526 RUNTIME_FUNCTION *function, CONTEXT *context,
3527 PVOID *data, ULONG64 *frame_ret,
3528 KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
3529 {
3530 union handler_data *handler_data;
3531 ULONG64 frame, off;
3532 struct UNWIND_INFO *info;
3533 unsigned int i, prolog_offset;
3534
3535 TRACE( "type %x rip %lx rsp %lx\n", type, pc, context->Rsp );
3536 if (TRACE_ON(seh)) dump_unwind_info( base, function );
3537
3538 frame = *frame_ret = context->Rsp;
3539 for (;;)
3540 {
3541 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
3542 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
3543
3544 if (info->version != 1)
3545 {
3546 FIXME( "unknown unwind info version %u at %p\n", info->version, info );
3547 return NULL;
3548 }
3549
3550 if (info->frame_reg)
3551 frame = get_int_reg( context, info->frame_reg ) - info->frame_offset * 16;
3552
3553 /* check if in prolog */
3554 if (pc >= base + function->BeginAddress && pc < base + function->BeginAddress + info->prolog)
3555 {
3556 prolog_offset = pc - base - function->BeginAddress;
3557 }
3558 else
3559 {
3560 prolog_offset = ~0;
3561 if (is_inside_epilog( (BYTE *)pc, base, function ))
3562 {
3563 interpret_epilog( (BYTE *)pc, context, ctx_ptr );
3564 *frame_ret = frame;
3565 return NULL;
3566 }
3567 }
3568
3569 for (i = 0; i < info->count; i += get_opcode_size(info->opcodes[i]))
3570 {
3571 if (prolog_offset < info->opcodes[i].offset) continue; /* skip it */
3572
3573 switch (info->opcodes[i].code)
3574 {
3575 case UWOP_PUSH_NONVOL: /* pushq %reg */
3576 set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)context->Rsp );
3577 context->Rsp += sizeof(ULONG64);
3578 break;
3579 case UWOP_ALLOC_LARGE: /* subq $nn,%rsp */
3580 if (info->opcodes[i].info) context->Rsp += *(DWORD *)&info->opcodes[i+1];
3581 else context->Rsp += *(USHORT *)&info->opcodes[i+1] * 8;
3582 break;
3583 case UWOP_ALLOC_SMALL: /* subq $n,%rsp */
3584 context->Rsp += (info->opcodes[i].info + 1) * 8;
3585 break;
3586 case UWOP_SET_FPREG: /* leaq nn(%rsp),%framereg */
3587 context->Rsp = *frame_ret = frame;
3588 break;
3589 case UWOP_SAVE_NONVOL: /* movq %reg,n(%rsp) */
3590 off = frame + *(USHORT *)&info->opcodes[i+1] * 8;
3591 set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)off );
3592 break;
3593 case UWOP_SAVE_NONVOL_FAR: /* movq %reg,nn(%rsp) */
3594 off = frame + *(DWORD *)&info->opcodes[i+1];
3595 set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)off );
3596 break;
3597 case UWOP_SAVE_XMM128: /* movaps %xmmreg,n(%rsp) */
3598 off = frame + *(USHORT *)&info->opcodes[i+1] * 16;
3599 set_float_reg( context, ctx_ptr, info->opcodes[i].info, (M128A *)off );
3600 break;
3601 case UWOP_SAVE_XMM128_FAR: /* movaps %xmmreg,nn(%rsp) */
3602 off = frame + *(DWORD *)&info->opcodes[i+1];
3603 set_float_reg( context, ctx_ptr, info->opcodes[i].info, (M128A *)off );
3604 break;
3605 case UWOP_PUSH_MACHFRAME:
3606 FIXME( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
3607 break;
3608 default:
3609 FIXME( "unknown code %u\n", info->opcodes[i].code );
3610 break;
3611 }
3612 }
3613
3614 if (!(info->flags & UNW_FLAG_CHAININFO)) break;
3615 function = &handler_data->chain; /* restart with the chained info */
3616 }
3617
3618 /* now pop return address */
3619 context->Rip = *(ULONG64 *)context->Rsp;
3620 context->Rsp += sizeof(ULONG64);
3621
3622 if (!(info->flags & type)) return NULL; /* no matching handler */
3623 if (prolog_offset != ~0) return NULL; /* inside prolog */
3624
3625 *data = &handler_data->handler + 1;
3626 return (char *)base + handler_data->handler;
3627 }
3628
3629 struct unwind_exception_frame
3630 {
3631 EXCEPTION_REGISTRATION_RECORD frame;
3632 DISPATCHER_CONTEXT *dispatch;
3633 };
3634
3635 /**********************************************************************
3636 * unwind_exception_handler
3637 *
3638 * Handler for exceptions happening while calling an unwind handler.
3639 */
3640 static DWORD unwind_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
3641 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
3642 {
3643 struct unwind_exception_frame *unwind_frame = (struct unwind_exception_frame *)frame;
3644 DISPATCHER_CONTEXT *dispatch = (DISPATCHER_CONTEXT *)dispatcher;
3645
3646 /* copy the original dispatcher into the current one, except for the TargetIp */
3647 dispatch->ControlPc = unwind_frame->dispatch->ControlPc;
3648 dispatch->ImageBase = unwind_frame->dispatch->ImageBase;
3649 dispatch->FunctionEntry = unwind_frame->dispatch->FunctionEntry;
3650 dispatch->EstablisherFrame = unwind_frame->dispatch->EstablisherFrame;
3651 dispatch->ContextRecord = unwind_frame->dispatch->ContextRecord;
3652 dispatch->LanguageHandler = unwind_frame->dispatch->LanguageHandler;
3653 dispatch->HandlerData = unwind_frame->dispatch->HandlerData;
3654 dispatch->HistoryTable = unwind_frame->dispatch->HistoryTable;
3655 dispatch->ScopeIndex = unwind_frame->dispatch->ScopeIndex;
3656 TRACE( "detected collided unwind\n" );
3657 return ExceptionCollidedUnwind;
3658 }
3659
3660 /**********************************************************************
3661 * call_unwind_handler
3662 *
3663 * Call a single unwind handler.
3664 */
3665 static DWORD call_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch )
3666 {
3667 struct unwind_exception_frame frame;
3668 DWORD res;
3669
3670 frame.frame.Handler = unwind_exception_handler;
3671 frame.dispatch = dispatch;
3672 __wine_push_frame( &frame.frame );
3673
3674 TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
3675 dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
3676 res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
3677 TRACE( "handler %p returned %x\n", dispatch->LanguageHandler, res );
3678
3679 __wine_pop_frame( &frame.frame );
3680
3681 switch (res)
3682 {
3683 case ExceptionContinueSearch:
3684 case ExceptionCollidedUnwind:
3685 break;
3686 default:
3687 raise_status( STATUS_INVALID_DISPOSITION, rec );
3688 break;
3689 }
3690
3691 return res;
3692 }
3693
3694
3695 /**********************************************************************
3696 * call_teb_unwind_handler
3697 *
3698 * Call a single unwind handler from the TEB chain.
3699 */
3700 static DWORD call_teb_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
3701 EXCEPTION_REGISTRATION_RECORD *teb_frame )
3702 {
3703 DWORD res;
3704
3705 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
3706 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
3707 res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
3708 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
3709
3710 switch (res)
3711 {
3712 case ExceptionContinueSearch:
3713 case ExceptionCollidedUnwind:
3714 break;
3715 default:
3716 raise_status( STATUS_INVALID_DISPOSITION, rec );
3717 break;
3718 }
3719
3720 return res;
3721 }
3722
3723
3724 /**********************************************************************
3725 * call_consolidate_callback
3726 *
3727 * Wrapper function to call a consolidate callback from a fake frame.
3728 * If the callback executes RtlUnwindEx (like for example done in C++ handlers),
3729 * we have to skip all frames which were already processed. To do that we
3730 * trick the unwinding functions into thinking the call came from somewhere
3731 * else. All CFI instructions are either DW_CFA_def_cfa_expression or
3732 * DW_CFA_expression, and the expressions have the following format:
3733 *
3734 * DW_OP_breg6; sleb128 0x10 | Load %rbp + 0x10
3735 * DW_OP_deref | Get *(%rbp + 0x10) == context
3736 * DW_OP_plus_uconst; uleb128 <OFFSET> | Add offset to get struct member
3737 * [DW_OP_deref] | Dereference, only for CFA
3738 */
3739 extern void * WINAPI call_consolidate_callback( CONTEXT *context,
3740 void *(CALLBACK *callback)(EXCEPTION_RECORD *),
3741 EXCEPTION_RECORD *rec );
3742 __ASM_GLOBAL_FUNC( call_consolidate_callback,
3743 "pushq %rbp\n\t"
3744 __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
3745 __ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
3746 "movq %rsp,%rbp\n\t"
3747 __ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
3748 "subq $0x20,%rsp\n\t"
3749 "movq %rcx,0x10(%rbp)\n\t"
3750 __ASM_CFI(".cfi_remember_state\n\t")
3751 __ASM_CFI(".cfi_escape 0x0f,0x07,0x76,0x10,0x06,0x23,0x98,0x01,0x06\n\t") /* CFA */
3752 __ASM_CFI(".cfi_escape 0x10,0x03,0x06,0x76,0x10,0x06,0x23,0x90,0x01\n\t") /* %rbx */
3753 __ASM_CFI(".cfi_escape 0x10,0x04,0x06,0x76,0x10,0x06,0x23,0xa8,0x01\n\t") /* %rsi */
3754 __ASM_CFI(".cfi_escape 0x10,0x05,0x06,0x76,0x10,0x06,0x23,0xb0,0x01\n\t") /* %rdi */
3755 __ASM_CFI(".cfi_escape 0x10,0x06,0x06,0x76,0x10,0x06,0x23,0xa0,0x01\n\t") /* %rbp */
3756 __ASM_CFI(".cfi_escape 0x10,0x0c,0x06,0x76,0x10,0x06,0x23,0xd8,0x01\n\t") /* %r12 */
3757 __ASM_CFI(".cfi_escape 0x10,0x0d,0x06,0x76,0x10,0x06,0x23,0xe0,0x01\n\t") /* %r13 */
3758 __ASM_CFI(".cfi_escape 0x10,0x0e,0x06,0x76,0x10,0x06,0x23,0xe8,0x01\n\t") /* %r14 */
3759 __ASM_CFI(".cfi_escape 0x10,0x0f,0x06,0x76,0x10,0x06,0x23,0xf0,0x01\n\t") /* %r15 */
3760 __ASM_CFI(".cfi_escape 0x10,0x10,0x06,0x76,0x10,0x06,0x23,0xf8,0x01\n\t") /* %rip */
3761 __ASM_CFI(".cfi_escape 0x10,0x17,0x06,0x76,0x10,0x06,0x23,0x80,0x04\n\t") /* %xmm6 */
3762 __ASM_CFI(".cfi_escape 0x10,0x18,0x06,0x76,0x10,0x06,0x23,0x90,0x04\n\t") /* %xmm7 */
3763 __ASM_CFI(".cfi_escape 0x10,0x19,0x06,0x76,0x10,0x06,0x23,0xa0,0x04\n\t") /* %xmm8 */
3764 __ASM_CFI(".cfi_escape 0x10,0x1a,0x06,0x76,0x10,0x06,0x23,0xb0,0x04\n\t") /* %xmm9 */
3765 __ASM_CFI(".cfi_escape 0x10,0x1b,0x06,0x76,0x10,0x06,0x23,0xc0,0x04\n\t") /* %xmm10 */
3766 __ASM_CFI(".cfi_escape 0x10,0x1c,0x06,0x76,0x10,0x06,0x23,0xd0,0x04\n\t") /* %xmm11 */
3767 __ASM_CFI(".cfi_escape 0x10,0x1d,0x06,0x76,0x10,0x06,0x23,0xe0,0x04\n\t") /* %xmm12 */
3768 __ASM_CFI(".cfi_escape 0x10,0x1e,0x06,0x76,0x10,0x06,0x23,0xf0,0x04\n\t") /* %xmm13 */
3769 __ASM_CFI(".cfi_escape 0x10,0x1f,0x06,0x76,0x10,0x06,0x23,0x80,0x05\n\t") /* %xmm14 */
3770 __ASM_CFI(".cfi_escape 0x10,0x20,0x06,0x76,0x10,0x06,0x23,0x90,0x05\n\t") /* %xmm15 */
3771 "movq %r8,%rcx\n\t"
3772 "callq *%rdx\n\t"
3773 __ASM_CFI(".cfi_restore_state\n\t")
3774 "movq %rbp,%rsp\n\t"
3775 __ASM_CFI(".cfi_def_cfa_register %rsp\n\t")
3776 "popq %rbp\n\t"
3777 __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
3778 __ASM_CFI(".cfi_same_value %rbp\n\t")
3779 "ret")
3780
3781 /*******************************************************************
3782 * RtlRestoreContext (NTDLL.@)
3783 */
3784 void WINAPI RtlRestoreContext( CONTEXT *context, EXCEPTION_RECORD *rec )
3785 {
3786 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
3787
3788 if (rec && rec->ExceptionCode == STATUS_LONGJUMP && rec->NumberParameters >= 1)
3789 {
3790 struct MSVCRT_JUMP_BUFFER *jmp = (struct MSVCRT_JUMP_BUFFER *)rec->ExceptionInformation[0];
3791 context->Rbx = jmp->Rbx;
3792 context->Rsp = jmp->Rsp;
3793 context->Rbp = jmp->Rbp;
3794 context->Rsi = jmp->Rsi;
3795 context->Rdi = jmp->Rdi;
3796 context->R12 = jmp->R12;
3797 context->R13 = jmp->R13;
3798 context->R14 = jmp->R14;
3799 context->R15 = jmp->R15;
3800 context->Rip = jmp->Rip;
3801 context->u.s.Xmm6 = jmp->Xmm6;
3802 context->u.s.Xmm7 = jmp->Xmm7;
3803 context->u.s.Xmm8 = jmp->Xmm8;
3804 context->u.s.Xmm9 = jmp->Xmm9;
3805 context->u.s.Xmm10 = jmp->Xmm10;
3806 context->u.s.Xmm11 = jmp->Xmm11;
3807 context->u.s.Xmm12 = jmp->Xmm12;
3808 context->u.s.Xmm13 = jmp->Xmm13;
3809 context->u.s.Xmm14 = jmp->Xmm14;
3810 context->u.s.Xmm15 = jmp->Xmm15;
3811 }
3812 else if (rec && rec->ExceptionCode == STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters >= 1)
3813 {
3814 PVOID (CALLBACK *consolidate)(EXCEPTION_RECORD *) = (void *)rec->ExceptionInformation[0];
3815 TRACE( "calling consolidate callback %p (rec=%p)\n", consolidate, rec );
3816 context->Rip = (ULONG64)call_consolidate_callback( context, consolidate, rec );
3817 }
3818
3819 /* hack: remove no longer accessible TEB frames */
3820 while ((ULONG64)teb_frame < context->Rsp)
3821 {
3822 TRACE( "removing TEB frame: %p\n", teb_frame );
3823 teb_frame = __wine_pop_frame( teb_frame );
3824 }
3825
3826 TRACE( "returning to %lx stack %lx\n", context->Rip, context->Rsp );
3827 set_cpu_context( context );
3828 }
3829
3830
3831 /*******************************************************************
3832 * RtlUnwindEx (NTDLL.@)
3833 */
3834 void WINAPI RtlUnwindEx( PVOID end_frame, PVOID target_ip, EXCEPTION_RECORD *rec,
3835 PVOID retval, CONTEXT *context, UNWIND_HISTORY_TABLE *table )
3836 {
3837 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
3838 EXCEPTION_RECORD record;
3839 DISPATCHER_CONTEXT dispatch;
3840 CONTEXT new_context;
3841 LDR_MODULE *module;
3842 NTSTATUS status;
3843 DWORD i;
3844
3845 RtlCaptureContext( context );
3846 new_context = *context;
3847
3848 /* build an exception record, if we do not have one */
3849 if (!rec)
3850 {
3851 record.ExceptionCode = STATUS_UNWIND;
3852 record.ExceptionFlags = 0;
3853 record.ExceptionRecord = NULL;
3854 record.ExceptionAddress = (void *)context->Rip;
3855 record.NumberParameters = 0;
3856 rec = &record;
3857 }
3858
3859 rec->ExceptionFlags |= EH_UNWINDING | (end_frame ? 0 : EH_EXIT_UNWIND);
3860
3861 TRACE( "code=%x flags=%x end_frame=%p target_ip=%p rip=%016lx\n",
3862 rec->ExceptionCode, rec->ExceptionFlags, end_frame, target_ip, context->Rip );
3863 for (i = 0; i < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); i++)
3864 TRACE( " info[%d]=%016lx\n", i, rec->ExceptionInformation[i] );
3865 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
3866 context->Rax, context->Rbx, context->Rcx, context->Rdx );
3867 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
3868 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
3869 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
3870 context->R8, context->R9, context->R10, context->R11 );
3871 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
3872 context->R12, context->R13, context->R14, context->R15 );
3873
3874 dispatch.EstablisherFrame = context->Rsp;
3875 dispatch.TargetIp = (ULONG64)target_ip;
3876 dispatch.ContextRecord = context;
3877 dispatch.HistoryTable = table;
3878
3879 for (;;)
3880 {
3881 /* FIXME: should use the history table to make things faster */
3882
3883 dispatch.ImageBase = 0;
3884 dispatch.ScopeIndex = 0;
3885 dispatch.ControlPc = context->Rip;
3886
3887 /* first look for PE exception information */
3888
3889 if ((dispatch.FunctionEntry = lookup_function_info( context->Rip, &dispatch.ImageBase, &module )))
3890 {
3891 dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_UHANDLER, dispatch.ImageBase,
3892 context->Rip, dispatch.FunctionEntry,
3893 &new_context, &dispatch.HandlerData,
3894 &dispatch.EstablisherFrame, NULL );
3895 goto unwind_done;
3896 }
3897
3898 /* then look for host system exception information */
3899
3900 if (!module || (module->Flags & LDR_WINE_INTERNAL))
3901 {
3902 BOOL got_info = FALSE;
3903 struct dwarf_eh_bases bases;
3904 const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context->Rip - 1), &bases );
3905
3906 if (fde)
3907 {
3908 status = dwarf_virtual_unwind( context->Rip, &dispatch.EstablisherFrame, &new_context, fde,
3909 &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
3910 if (status != STATUS_SUCCESS) raise_status( status, rec );
3911 got_info = TRUE;
3912 }
3913 #ifdef HAVE_LIBUNWIND_H
3914 else
3915 {
3916 status = libunwind_virtual_unwind( context->Rip, &got_info, &dispatch.EstablisherFrame, &new_context,
3917 &dispatch.LanguageHandler, &dispatch.HandlerData );
3918 if (status != STATUS_SUCCESS) raise_status( status, rec );
3919 }
3920 #endif
3921
3922 if (got_info)
3923 {
3924 dispatch.FunctionEntry = NULL;
3925 if (dispatch.LanguageHandler && !module)
3926 {
3927 FIXME( "calling personality routine in system library not supported yet\n" );
3928 dispatch.LanguageHandler = NULL;
3929 }
3930 goto unwind_done;
3931 }
3932 }
3933 else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
3934
3935 /* no exception information, treat as a leaf function */
3936
3937 new_context.Rip = *(ULONG64 *)context->Rsp;
3938 new_context.Rsp = context->Rsp + sizeof(ULONG64);
3939 dispatch.EstablisherFrame = new_context.Rsp;
3940 dispatch.LanguageHandler = NULL;
3941
3942 unwind_done:
3943 if (!dispatch.EstablisherFrame) break;
3944
3945 if (is_inside_signal_stack( (void *)dispatch.EstablisherFrame ))
3946 {
3947 TRACE( "frame %lx is inside signal stack (%p-%p)\n", dispatch.EstablisherFrame,
3948 get_signal_stack(), (char *)get_signal_stack() + signal_stack_size );
3949 *context = new_context;
3950 continue;
3951 }
3952
3953 if ((dispatch.EstablisherFrame & 7) ||
3954 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
3955 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
3956 {
3957 ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
3958 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
3959 rec->ExceptionFlags |= EH_STACK_INVALID;
3960 break;
3961 }
3962
3963 if (dispatch.LanguageHandler)
3964 {
3965 if (end_frame && (dispatch.EstablisherFrame > (ULONG64)end_frame))
3966 {
3967 ERR( "invalid end frame %lx/%p\n", dispatch.EstablisherFrame, end_frame );
3968 raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
3969 }
3970 if (dispatch.EstablisherFrame == (ULONG64)end_frame) rec->ExceptionFlags |= EH_TARGET_UNWIND;
3971 if (call_unwind_handler( rec, &dispatch ) == ExceptionCollidedUnwind)
3972 {
3973 ULONG64 frame;
3974
3975 *context = new_context = *dispatch.ContextRecord;
3976 dispatch.ContextRecord = context;
3977 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
3978 dispatch.ControlPc, dispatch.FunctionEntry,
3979 &new_context, NULL, &frame, NULL );
3980 rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
3981 goto unwind_done;
3982 }
3983 rec->ExceptionFlags &= ~EH_COLLIDED_UNWIND;
3984 }
3985 else /* hack: call builtin handlers registered in the tib list */
3986 {
3987 DWORD64 backup_frame = dispatch.EstablisherFrame;
3988 while ((ULONG64)teb_frame < new_context.Rsp && (ULONG64)teb_frame < (ULONG64)end_frame)
3989 {
3990 TRACE( "found builtin frame %p handler %p\n", teb_frame, teb_frame->Handler );
3991 dispatch.EstablisherFrame = (ULONG64)teb_frame;
3992 if (call_teb_unwind_handler( rec, &dispatch, teb_frame ) == ExceptionCollidedUnwind)
3993 {
3994 ULONG64 frame;
3995
3996 teb_frame = __wine_pop_frame( teb_frame );
3997
3998 *context = new_context = *dispatch.ContextRecord;
3999 dispatch.ContextRecord = context;
4000 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
4001 dispatch.ControlPc, dispatch.FunctionEntry,
4002 &new_context, NULL, &frame, NULL );
4003 rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
4004 goto unwind_done;
4005 }
4006 teb_frame = __wine_pop_frame( teb_frame );
4007 }
4008 if ((ULONG64)teb_frame == (ULONG64)end_frame && (ULONG64)end_frame < new_context.Rsp) break;
4009 dispatch.EstablisherFrame = backup_frame;
4010 }
4011
4012 if (dispatch.EstablisherFrame == (ULONG64)end_frame) break;
4013 *context = new_context;
4014 }
4015
4016 context->Rax = (ULONG64)retval;
4017 context->Rip = (ULONG64)target_ip;
4018 RtlRestoreContext(context, rec);
4019 }
4020
4021
4022 /*******************************************************************
4023 * RtlUnwind (NTDLL.@)
4024 */
4025 void WINAPI RtlUnwind( void *frame, void *target_ip, EXCEPTION_RECORD *rec, void *retval )
4026 {
4027 CONTEXT context;
4028 RtlUnwindEx( frame, target_ip, rec, retval, &context, NULL );
4029 }
4030
4031
4032 /*******************************************************************
4033 * _local_unwind (NTDLL.@)
4034 */
4035 void WINAPI _local_unwind( void *frame, void *target_ip )
4036 {
4037 CONTEXT context;
4038 RtlUnwindEx( frame, target_ip, NULL, NULL, &context, NULL );
4039 }
4040
4041 /*******************************************************************
4042 * __C_specific_handler (NTDLL.@)
4043 */
4044 EXCEPTION_DISPOSITION WINAPI __C_specific_handler( EXCEPTION_RECORD *rec,
4045 ULONG64 frame,
4046 CONTEXT *context,
4047 struct _DISPATCHER_CONTEXT *dispatch )
4048 {
4049 SCOPE_TABLE *table = dispatch->HandlerData;
4050 ULONG i;
4051
4052 TRACE( "%p %lx %p %p\n", rec, frame, context, dispatch );
4053 if (TRACE_ON(seh)) dump_scope_table( dispatch->ImageBase, table );
4054
4055 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
4056 {
4057 for (i = dispatch->ScopeIndex; i < table->Count; i++)
4058 {
4059 if (dispatch->ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
4060 dispatch->ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
4061 {
4062 TERMINATION_HANDLER handler;
4063
4064 if (table->ScopeRecord[i].JumpTarget) continue;
4065
4066 if (rec->ExceptionFlags & EH_TARGET_UNWIND &&
4067 dispatch->TargetIp >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
4068 dispatch->TargetIp < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
4069 {
4070 break;
4071 }
4072
4073 handler = (TERMINATION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
4074 dispatch->ScopeIndex = i+1;
4075
4076 TRACE( "calling __finally %p frame %lx\n", handler, frame );
4077 handler( 1, frame );
4078 }
4079 }
4080 return ExceptionContinueSearch;
4081 }
4082
4083 for (i = dispatch->ScopeIndex; i < table->Count; i++)
4084 {
4085 if (dispatch->ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
4086 dispatch->ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
4087 {
4088 if (!table->ScopeRecord[i].JumpTarget) continue;
4089 if (table->ScopeRecord[i].HandlerAddress != EXCEPTION_EXECUTE_HANDLER)
4090 {
4091 EXCEPTION_POINTERS ptrs;
4092 PC_LANGUAGE_EXCEPTION_HANDLER filter;
4093
4094 filter = (PC_LANGUAGE_EXCEPTION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
4095 ptrs.ExceptionRecord = rec;
4096 ptrs.ContextRecord = context;
4097 TRACE( "calling filter %p ptrs %p frame %lx\n", filter, &ptrs, frame );
4098 switch (filter( &ptrs, frame ))
4099 {
4100 case EXCEPTION_EXECUTE_HANDLER:
4101 break;
4102 case EXCEPTION_CONTINUE_SEARCH:
4103 continue;
4104 case EXCEPTION_CONTINUE_EXECUTION:
4105 return ExceptionContinueExecution;
4106 }
4107 }
4108 TRACE( "unwinding to target %lx\n", dispatch->ImageBase + table->ScopeRecord[i].JumpTarget );
4109 RtlUnwindEx( (void *)frame, (char *)dispatch->ImageBase + table->ScopeRecord[i].JumpTarget,
4110 rec, 0, dispatch->ContextRecord, dispatch->HistoryTable );
4111 }
4112 }
4113 return ExceptionContinueSearch;
4114 }
4115
4116
4117 /***********************************************************************
4118 * RtlRaiseException (NTDLL.@)
4119 */
4120 __ASM_GLOBAL_FUNC( RtlRaiseException,
4121 "movq %rcx,8(%rsp)\n\t"
4122 "sub $0x4f8,%rsp\n\t"
4123 __ASM_CFI(".cfi_adjust_cfa_offset 0x4f8\n\t")
4124 "leaq 0x20(%rsp),%rcx\n\t"
4125 "call " __ASM_NAME("RtlCaptureContext") "\n\t"
4126 "leaq 0x20(%rsp),%rdx\n\t" /* context pointer */
4127 "leaq 0x500(%rsp),%rax\n\t" /* orig stack pointer */
4128 "movq %rax,0x98(%rdx)\n\t" /* context->Rsp */
4129 "movq (%rax),%rcx\n\t" /* original first parameter */
4130 "movq %rcx,0x80(%rdx)\n\t" /* context->Rcx */
4131 "movq 0x4f8(%rsp),%rax\n\t" /* return address */
4132 "movq %rax,0xf8(%rdx)\n\t" /* context->Rip */
4133 "movq %rax,0x10(%rcx)\n\t" /* rec->ExceptionAddress */
4134 "movl $1,%r8d\n\t"
4135 "call " __ASM_NAME("NtRaiseException") "\n\t"
4136 "movq %rax,%rcx\n\t"
4137 "call " __ASM_NAME("RtlRaiseStatus") /* does not return */ );
4138
4139
4140 /*************************************************************************
4141 * RtlCaptureStackBackTrace (NTDLL.@)
4142 */
4143 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
4144 {
4145 FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash );
4146 return 0;
4147 }
4148
4149
4150 /***********************************************************************
4151 * call_thread_func
4152 */
4153 static void WINAPI call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg )
4154 {
4155 __TRY
4156 {
4157 TRACE_(relay)( "\1Starting thread proc %p (arg=%p)\n", entry, arg );
4158 RtlExitUserThread( entry( arg ));
4159 }
4160 __EXCEPT(unhandled_exception_filter)
4161 {
4162 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
4163 }
4164 __ENDTRY
4165 abort(); /* should not be reached */
4166 }
4167
4168
4169 extern void DECLSPEC_NORETURN start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend,
4170 void *relay );
4171 __ASM_GLOBAL_FUNC( start_thread,
4172 "subq $56,%rsp\n\t"
4173 __ASM_CFI(".cfi_adjust_cfa_offset 56\n\t")
4174 "movq %rbp,48(%rsp)\n\t"
4175 __ASM_CFI(".cfi_rel_offset %rbp,48\n\t")
4176 "movq %rbx,40(%rsp)\n\t"
4177 __ASM_CFI(".cfi_rel_offset %rbx,40\n\t")
4178 "movq %r12,32(%rsp)\n\t"
4179 __ASM_CFI(".cfi_rel_offset %r12,32\n\t")
4180 "movq %r13,24(%rsp)\n\t"
4181 __ASM_CFI(".cfi_rel_offset %r13,24\n\t")
4182 "movq %r14,16(%rsp)\n\t"
4183 __ASM_CFI(".cfi_rel_offset %r14,16\n\t")
4184 "movq %r15,8(%rsp)\n\t"
4185 __ASM_CFI(".cfi_rel_offset %r15,8\n\t")
4186 /* store exit frame */
4187 "movq %gs:0x30,%rax\n\t"
4188 "movq %rsp,0x330(%rax)\n\t" /* amd64_thread_data()->exit_frame */
4189 /* switch to thread stack */
4190 "movq 8(%rax),%rax\n\t" /* NtCurrentTeb()->Tib.StackBase */
4191 "leaq -0x1000(%rax),%rsp\n\t"
4192 /* attach dlls */
4193 "call " __ASM_NAME("attach_thread") "\n\t"
4194 "movq %rax,%rsp\n\t"
4195 /* clear the stack */
4196 "andq $~0xfff,%rax\n\t" /* round down to page size */
4197 "movq %rax,%rdi\n\t"
4198 "call " __ASM_NAME("virtual_clear_thread_stack") "\n\t"
4199 /* switch to the initial context */
4200 "movq %rsp,%rdi\n\t"
4201 "call " __ASM_NAME("set_cpu_context") )
4202
4203 extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int) );
4204 __ASM_GLOBAL_FUNC( call_thread_exit_func,
4205 /* fetch exit frame */
4206 "movq %gs:0x30,%rax\n\t"
4207 "movq 0x330(%rax),%rdx\n\t" /* amd64_thread_data()->exit_frame */
4208 "testq %rdx,%rdx\n\t"
4209 "jnz 1f\n\t"
4210 "jmp *%rsi\n"
4211 /* switch to exit frame stack */
4212 "1:\tmovq $0,0x330(%rax)\n\t"
4213 "movq %rdx,%rsp\n\t"
4214 __ASM_CFI(".cfi_adjust_cfa_offset 56\n\t")
4215 __ASM_CFI(".cfi_rel_offset %rbp,48\n\t")
4216 __ASM_CFI(".cfi_rel_offset %rbx,40\n\t")
4217 __ASM_CFI(".cfi_rel_offset %r12,32\n\t")
4218 __ASM_CFI(".cfi_rel_offset %r13,24\n\t")
4219 __ASM_CFI(".cfi_rel_offset %r14,16\n\t")
4220 __ASM_CFI(".cfi_rel_offset %r15,8\n\t")
4221 "call *%rsi" )
4222
4223
4224 /***********************************************************************
4225 * init_thread_context
4226 */
4227 static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg, void *relay )
4228 {
4229 __asm__( "movw %%cs,%0" : "=m" (context->SegCs) );
4230 __asm__( "movw %%ss,%0" : "=m" (context->SegSs) );
4231 __asm__( "fxsave %0" : "=m" (context->u.FltSave) );
4232 context->Rcx = (ULONG_PTR)entry;
4233 context->Rdx = (ULONG_PTR)arg;
4234 context->Rsp = (ULONG_PTR)NtCurrentTeb()->Tib.StackBase - 0x28;
4235 context->Rip = (ULONG_PTR)relay;
4236 context->EFlags = 0x200;
4237 }
4238
4239
4240 /***********************************************************************
4241 * attach_thread
4242 */
4243 PCONTEXT DECLSPEC_HIDDEN attach_thread( LPTHREAD_START_ROUTINE entry, void *arg,
4244 BOOL suspend, void *relay )
4245 {
4246 CONTEXT *ctx;
4247
4248 if (suspend)
4249 {
4250 CONTEXT context = { 0 };
4251
4252 context.ContextFlags = CONTEXT_ALL;
4253 init_thread_context( &context, entry, arg, relay );
4254 wait_suspend( &context );
4255 ctx = (CONTEXT *)((ULONG_PTR)context.Rsp & ~15) - 1;
4256 *ctx = context;
4257 }
4258 else
4259 {
4260 ctx = (CONTEXT *)((char *)NtCurrentTeb()->Tib.StackBase - 0x30) - 1;
4261 init_thread_context( ctx, entry, arg, relay );
4262 }
4263 ctx->ContextFlags = CONTEXT_FULL;
4264 attach_dlls( ctx, (void **)&ctx->Rcx );
4265 return ctx;
4266 }
4267
4268
4269 /***********************************************************************
4270 * signal_start_thread
4271 *
4272 * Thread startup sequence:
4273 * signal_start_thread()
4274 * -> start_thread()
4275 * -> call_thread_func()
4276 */
4277 void signal_start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend )
4278 {
4279 start_thread( entry, arg, suspend, call_thread_func );
4280 }
4281
4282
4283 /**********************************************************************
4284 * signal_start_process
4285 *
4286 * Process startup sequence:
4287 * signal_start_process()
4288 * -> start_thread()
4289 * -> kernel32_start_process()
4290 */
4291 void signal_start_process( LPTHREAD_START_ROUTINE entry, BOOL suspend )
4292 {
4293 start_thread( entry, NtCurrentTeb()->Peb, suspend, kernel32_start_process );
4294 }
4295
4296
4297 /***********************************************************************
4298 * signal_exit_thread
4299 */
4300 void signal_exit_thread( int status )
4301 {
4302 call_thread_exit_func( status, exit_thread );
4303 }
4304
4305 /***********************************************************************
4306 * signal_exit_process
4307 */
4308 void signal_exit_process( int status )
4309 {
4310 call_thread_exit_func( status, exit );
4311 }
4312
4313 /**********************************************************************
4314 * DbgBreakPoint (NTDLL.@)
4315 */
4316 __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret")
4317
4318 /**********************************************************************
4319 * DbgUserBreakPoint (NTDLL.@)
4320 */
4321 __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret")
4322
4323 #endif /* __x86_64__ */
Windows API implementation