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secur32: Don't try to set an empty target name in schan_InitializeSecurityContextW.
[wine/multimedia.git] / dlls / ntdll / signal_x86_64.c
blob493a9f7d0d750d90e82265001f2f858c797b3b5c
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
55 #define NONAMELESSUNION
56 #define NONAMELESSSTRUCT
57 #include "ntstatus.h"
58 #define WIN32_NO_STATUS
59 #include "windef.h"
60 #include "winternl.h"
61 #include "wine/library.h"
62 #include "wine/exception.h"
63 #include "wine/list.h"
64 #include "ntdll_misc.h"
65 #include "wine/debug.h"
66
67 #ifdef HAVE_VALGRIND_MEMCHECK_H
68 #include <valgrind/memcheck.h>
69 #endif
70
71 WINE_DEFAULT_DEBUG_CHANNEL(seh);
72
73 struct _DISPATCHER_CONTEXT;
74
75 typedef LONG (WINAPI *PC_LANGUAGE_EXCEPTION_HANDLER)( EXCEPTION_POINTERS *ptrs, ULONG64 frame );
76 typedef EXCEPTION_DISPOSITION (WINAPI *PEXCEPTION_ROUTINE)( EXCEPTION_RECORD *rec,
77 ULONG64 frame,
78 CONTEXT *context,
79 struct _DISPATCHER_CONTEXT *dispatch );
80
81 typedef struct _DISPATCHER_CONTEXT
82 {
83 ULONG64 ControlPc;
84 ULONG64 ImageBase;
85 PRUNTIME_FUNCTION FunctionEntry;
86 ULONG64 EstablisherFrame;
87 ULONG64 TargetIp;
88 PCONTEXT ContextRecord;
89 PEXCEPTION_ROUTINE LanguageHandler;
90 PVOID HandlerData;
91 PUNWIND_HISTORY_TABLE HistoryTable;
92 ULONG ScopeIndex;
93 } DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT;
94
95 typedef struct _SCOPE_TABLE
96 {
97 ULONG Count;
98 struct
99 {
100 ULONG BeginAddress;
101 ULONG EndAddress;
102 ULONG HandlerAddress;
103 ULONG JumpTarget;
104 } ScopeRecord[1];
105 } SCOPE_TABLE, *PSCOPE_TABLE;
106
107
108 /* layering violation: the setjmp buffer is defined in msvcrt, but used by RtlUnwindEx */
109 struct MSVCRT_JUMP_BUFFER
110 {
111 ULONG64 Frame;
112 ULONG64 Rbx;
113 ULONG64 Rsp;
114 ULONG64 Rbp;
115 ULONG64 Rsi;
116 ULONG64 Rdi;
117 ULONG64 R12;
118 ULONG64 R13;
119 ULONG64 R14;
120 ULONG64 R15;
121 ULONG64 Rip;
122 ULONG64 Spare;
123 M128A Xmm6;
124 M128A Xmm7;
125 M128A Xmm8;
126 M128A Xmm9;
127 M128A Xmm10;
128 M128A Xmm11;
129 M128A Xmm12;
130 M128A Xmm13;
131 M128A Xmm14;
132 M128A Xmm15;
133 };
134
135 /***********************************************************************
136 * signal context platform-specific definitions
137 */
138 #ifdef linux
139
140 #include <asm/prctl.h>
141 static inline int arch_prctl( int func, void *ptr ) { return syscall( __NR_arch_prctl, func, ptr ); }
142
143 #define RAX_sig(context) ((context)->uc_mcontext.gregs[REG_RAX])
144 #define RBX_sig(context) ((context)->uc_mcontext.gregs[REG_RBX])
145 #define RCX_sig(context) ((context)->uc_mcontext.gregs[REG_RCX])
146 #define RDX_sig(context) ((context)->uc_mcontext.gregs[REG_RDX])
147 #define RSI_sig(context) ((context)->uc_mcontext.gregs[REG_RSI])
148 #define RDI_sig(context) ((context)->uc_mcontext.gregs[REG_RDI])
149 #define RBP_sig(context) ((context)->uc_mcontext.gregs[REG_RBP])
150 #define R8_sig(context) ((context)->uc_mcontext.gregs[REG_R8])
151 #define R9_sig(context) ((context)->uc_mcontext.gregs[REG_R9])
152 #define R10_sig(context) ((context)->uc_mcontext.gregs[REG_R10])
153 #define R11_sig(context) ((context)->uc_mcontext.gregs[REG_R11])
154 #define R12_sig(context) ((context)->uc_mcontext.gregs[REG_R12])
155 #define R13_sig(context) ((context)->uc_mcontext.gregs[REG_R13])
156 #define R14_sig(context) ((context)->uc_mcontext.gregs[REG_R14])
157 #define R15_sig(context) ((context)->uc_mcontext.gregs[REG_R15])
158
159 #define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0))
160 #define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1))
161 #define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2))
162
163 #define RSP_sig(context) ((context)->uc_mcontext.gregs[REG_RSP])
164 #define RIP_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
165 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
166 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
167 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
168
169 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.fpregs))
170
171 #elif defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
172
173 #define RAX_sig(context) ((context)->uc_mcontext.mc_rax)
174 #define RBX_sig(context) ((context)->uc_mcontext.mc_rbx)
175 #define RCX_sig(context) ((context)->uc_mcontext.mc_rcx)
176 #define RDX_sig(context) ((context)->uc_mcontext.mc_rdx)
177 #define RSI_sig(context) ((context)->uc_mcontext.mc_rsi)
178 #define RDI_sig(context) ((context)->uc_mcontext.mc_rdi)
179 #define RBP_sig(context) ((context)->uc_mcontext.mc_rbp)
180 #define R8_sig(context) ((context)->uc_mcontext.mc_r8)
181 #define R9_sig(context) ((context)->uc_mcontext.mc_r9)
182 #define R10_sig(context) ((context)->uc_mcontext.mc_r10)
183 #define R11_sig(context) ((context)->uc_mcontext.mc_r11)
184 #define R12_sig(context) ((context)->uc_mcontext.mc_r12)
185 #define R13_sig(context) ((context)->uc_mcontext.mc_r13)
186 #define R14_sig(context) ((context)->uc_mcontext.mc_r14)
187 #define R15_sig(context) ((context)->uc_mcontext.mc_r15)
188
189 #define CS_sig(context) ((context)->uc_mcontext.mc_cs)
190 #define DS_sig(context) ((context)->uc_mcontext.mc_ds)
191 #define ES_sig(context) ((context)->uc_mcontext.mc_es)
192 #define FS_sig(context) ((context)->uc_mcontext.mc_fs)
193 #define GS_sig(context) ((context)->uc_mcontext.mc_gs)
194 #define SS_sig(context) ((context)->uc_mcontext.mc_ss)
195
196 #define EFL_sig(context) ((context)->uc_mcontext.mc_rflags)
197
198 #define RIP_sig(context) ((context)->uc_mcontext.mc_rip)
199 #define RSP_sig(context) ((context)->uc_mcontext.mc_rsp)
200 #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
201 #define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
202
203 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.mc_fpstate))
204
205 #elif defined(__NetBSD__)
206
207 #define RAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RAX])
208 #define RBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBX])
209 #define RCX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RCX])
210 #define RDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDX])
211 #define RSI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RSI])
212 #define RDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDI])
213 #define RBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBP])
214 #define R8_sig(context) ((context)->uc_mcontext.__gregs[_REG_R8])
215 #define R9_sig(context) ((context)->uc_mcontext.__gregs[_REG_R9])
216 #define R10_sig(context) ((context)->uc_mcontext.__gregs[_REG_R10])
217 #define R11_sig(context) ((context)->uc_mcontext.__gregs[_REG_R11])
218 #define R12_sig(context) ((context)->uc_mcontext.__gregs[_REG_R12])
219 #define R13_sig(context) ((context)->uc_mcontext.__gregs[_REG_R13])
220 #define R14_sig(context) ((context)->uc_mcontext.__gregs[_REG_R14])
221 #define R15_sig(context) ((context)->uc_mcontext.__gregs[_REG_R15])
222
223 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
224 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
225 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
226 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
227 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
228 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
229
230 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_RFL])
231
232 #define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_RIP]))
233 #define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_URSP]))
234
235 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
236 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
237
238 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.__fpregs))
239 #elif defined (__APPLE__)
240 static pthread_key_t teb_key;
241
242 #define RAX_sig(context) ((context)->uc_mcontext->__ss.__rax)
243 #define RBX_sig(context) ((context)->uc_mcontext->__ss.__rbx)
244 #define RCX_sig(context) ((context)->uc_mcontext->__ss.__rcx)
245 #define RDX_sig(context) ((context)->uc_mcontext->__ss.__rdx)
246 #define RSI_sig(context) ((context)->uc_mcontext->__ss.__rsi)
247 #define RDI_sig(context) ((context)->uc_mcontext->__ss.__rdi)
248 #define RBP_sig(context) ((context)->uc_mcontext->__ss.__rbp)
249 #define R8_sig(context) ((context)->uc_mcontext->__ss.__r8)
250 #define R9_sig(context) ((context)->uc_mcontext->__ss.__r9)
251 #define R10_sig(context) ((context)->uc_mcontext->__ss.__r10)
252 #define R11_sig(context) ((context)->uc_mcontext->__ss.__r11)
253 #define R12_sig(context) ((context)->uc_mcontext->__ss.__r12)
254 #define R13_sig(context) ((context)->uc_mcontext->__ss.__r13)
255 #define R14_sig(context) ((context)->uc_mcontext->__ss.__r14)
256 #define R15_sig(context) ((context)->uc_mcontext->__ss.__r15)
257
258 #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
259 #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
260 #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
261
262 #define EFL_sig(context) ((context)->uc_mcontext->__ss.__rflags)
263
264 #define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rip))
265 #define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rsp))
266
267 #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
268 #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
269
270 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
271
272 #else
273 #error You must define the signal context functions for your platform
274 #endif
275
276 enum i386_trap_code
277 {
278 TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
279 TRAP_x86_DIVIDE = 0, /* Division by zero exception */
280 TRAP_x86_TRCTRAP = 1, /* Single-step exception */
281 TRAP_x86_NMI = 2, /* NMI interrupt */
282 TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
283 TRAP_x86_OFLOW = 4, /* Overflow exception */
284 TRAP_x86_BOUND = 5, /* Bound range exception */
285 TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
286 TRAP_x86_DNA = 7, /* Device not available exception */
287 TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
288 TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
289 TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
290 TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
291 TRAP_x86_STKFLT = 12, /* Stack fault */
292 TRAP_x86_PROTFLT = 13, /* General protection fault */
293 TRAP_x86_PAGEFLT = 14, /* Page fault */
294 TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
295 TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
296 TRAP_x86_MCHK = 18, /* Machine check exception */
297 TRAP_x86_CACHEFLT = 19 /* Cache flush exception */
298 };
299
300 static const size_t teb_size = 0x2000; /* we reserve two pages for the TEB */
301 static size_t signal_stack_size;
302
303 typedef void (*raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
304 typedef int (*wine_signal_handler)(unsigned int sig);
305
306 static wine_signal_handler handlers[256];
307
308 /***********************************************************************
309 * Dynamic unwind table
310 */
311
312 struct dynamic_unwind_entry
313 {
314 struct list entry;
315
316 /* memory region which matches this entry */
317 DWORD64 base;
318 DWORD size;
319
320 /* lookup table */
321 RUNTIME_FUNCTION *table;
322 DWORD table_size;
323
324 /* user defined callback */
325 PGET_RUNTIME_FUNCTION_CALLBACK callback;
326 PVOID context;
327 };
328
329 static struct list dynamic_unwind_list = LIST_INIT(dynamic_unwind_list);
330
331 static RTL_CRITICAL_SECTION dynamic_unwind_section;
332 static RTL_CRITICAL_SECTION_DEBUG dynamic_unwind_debug =
333 {
334 0, 0, &dynamic_unwind_section,
335 { &dynamic_unwind_debug.ProcessLocksList, &dynamic_unwind_debug.ProcessLocksList },
336 0, 0, { (DWORD_PTR)(__FILE__ ": dynamic_unwind_section") }
337 };
338 static RTL_CRITICAL_SECTION dynamic_unwind_section = { &dynamic_unwind_debug, -1, 0, 0, 0, 0 };
339
340 /***********************************************************************
341 * Definitions for Win32 unwind tables
342 */
343
344 union handler_data
345 {
346 RUNTIME_FUNCTION chain;
347 ULONG handler;
348 };
349
350 struct opcode
351 {
352 BYTE offset;
353 BYTE code : 4;
354 BYTE info : 4;
355 };
356
357 struct UNWIND_INFO
358 {
359 BYTE version : 3;
360 BYTE flags : 5;
361 BYTE prolog;
362 BYTE count;
363 BYTE frame_reg : 4;
364 BYTE frame_offset : 4;
365 struct opcode opcodes[1]; /* info->count entries */
366 /* followed by handler_data */
367 };
368
369 #define UWOP_PUSH_NONVOL 0
370 #define UWOP_ALLOC_LARGE 1
371 #define UWOP_ALLOC_SMALL 2
372 #define UWOP_SET_FPREG 3
373 #define UWOP_SAVE_NONVOL 4
374 #define UWOP_SAVE_NONVOL_FAR 5
375 #define UWOP_SAVE_XMM128 8
376 #define UWOP_SAVE_XMM128_FAR 9
377 #define UWOP_PUSH_MACHFRAME 10
378
379 static void dump_unwind_info( ULONG64 base, RUNTIME_FUNCTION *function )
380 {
381 static const char * const reg_names[16] =
382 { "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
383 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" };
384
385 union handler_data *handler_data;
386 struct UNWIND_INFO *info;
387 unsigned int i, count;
388
389 TRACE( "**** func %x-%x\n", function->BeginAddress, function->EndAddress );
390 for (;;)
391 {
392 if (function->UnwindData & 1)
393 {
394 RUNTIME_FUNCTION *next = (RUNTIME_FUNCTION *)((char *)base + (function->UnwindData & ~1));
395 TRACE( "unwind info for function %p-%p chained to function %p-%p\n",
396 (char *)base + function->BeginAddress, (char *)base + function->EndAddress,
397 (char *)base + next->BeginAddress, (char *)base + next->EndAddress );
398 function = next;
399 continue;
400 }
401 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
402
403 TRACE( "unwind info at %p flags %x prolog 0x%x bytes function %p-%p\n",
404 info, info->flags, info->prolog,
405 (char *)base + function->BeginAddress, (char *)base + function->EndAddress );
406
407 if (info->frame_reg)
408 TRACE( " frame register %s offset 0x%x(%%rsp)\n",
409 reg_names[info->frame_reg], info->frame_offset * 16 );
410
411 for (i = 0; i < info->count; i++)
412 {
413 TRACE( " 0x%x: ", info->opcodes[i].offset );
414 switch (info->opcodes[i].code)
415 {
416 case UWOP_PUSH_NONVOL:
417 TRACE( "pushq %%%s\n", reg_names[info->opcodes[i].info] );
418 break;
419 case UWOP_ALLOC_LARGE:
420 if (info->opcodes[i].info)
421 {
422 count = *(DWORD *)&info->opcodes[i+1];
423 i += 2;
424 }
425 else
426 {
427 count = *(USHORT *)&info->opcodes[i+1] * 8;
428 i++;
429 }
430 TRACE( "subq $0x%x,%%rsp\n", count );
431 break;
432 case UWOP_ALLOC_SMALL:
433 count = (info->opcodes[i].info + 1) * 8;
434 TRACE( "subq $0x%x,%%rsp\n", count );
435 break;
436 case UWOP_SET_FPREG:
437 TRACE( "leaq 0x%x(%%rsp),%s\n",
438 info->frame_offset * 16, reg_names[info->frame_reg] );
439 break;
440 case UWOP_SAVE_NONVOL:
441 count = *(USHORT *)&info->opcodes[i+1] * 8;
442 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
443 i++;
444 break;
445 case UWOP_SAVE_NONVOL_FAR:
446 count = *(DWORD *)&info->opcodes[i+1];
447 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
448 i += 2;
449 break;
450 case UWOP_SAVE_XMM128:
451 count = *(USHORT *)&info->opcodes[i+1] * 16;
452 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
453 i++;
454 break;
455 case UWOP_SAVE_XMM128_FAR:
456 count = *(DWORD *)&info->opcodes[i+1];
457 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
458 i += 2;
459 break;
460 case UWOP_PUSH_MACHFRAME:
461 TRACE( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
462 break;
463 default:
464 FIXME( "unknown code %u\n", info->opcodes[i].code );
465 break;
466 }
467 }
468
469 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
470 if (info->flags & UNW_FLAG_CHAININFO)
471 {
472 TRACE( " chained to function %p-%p\n",
473 (char *)base + handler_data->chain.BeginAddress,
474 (char *)base + handler_data->chain.EndAddress );
475 function = &handler_data->chain;
476 continue;
477 }
478 if (info->flags & (UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER))
479 TRACE( " handler %p data at %p\n",
480 (char *)base + handler_data->handler, &handler_data->handler + 1 );
481 break;
482 }
483 }
484
485 static void dump_scope_table( ULONG64 base, const SCOPE_TABLE *table )
486 {
487 unsigned int i;
488
489 TRACE( "scope table at %p\n", table );
490 for (i = 0; i < table->Count; i++)
491 TRACE( " %u: %lx-%lx handler %lx target %lx\n", i,
492 base + table->ScopeRecord[i].BeginAddress,
493 base + table->ScopeRecord[i].EndAddress,
494 base + table->ScopeRecord[i].HandlerAddress,
495 base + table->ScopeRecord[i].JumpTarget );
496 }
497
498
499 /***********************************************************************
500 * Definitions for Dwarf unwind tables
501 */
502
503 enum dwarf_call_frame_info
504 {
505 DW_CFA_advance_loc = 0x40,
506 DW_CFA_offset = 0x80,
507 DW_CFA_restore = 0xc0,
508 DW_CFA_nop = 0x00,
509 DW_CFA_set_loc = 0x01,
510 DW_CFA_advance_loc1 = 0x02,
511 DW_CFA_advance_loc2 = 0x03,
512 DW_CFA_advance_loc4 = 0x04,
513 DW_CFA_offset_extended = 0x05,
514 DW_CFA_restore_extended = 0x06,
515 DW_CFA_undefined = 0x07,
516 DW_CFA_same_value = 0x08,
517 DW_CFA_register = 0x09,
518 DW_CFA_remember_state = 0x0a,
519 DW_CFA_restore_state = 0x0b,
520 DW_CFA_def_cfa = 0x0c,
521 DW_CFA_def_cfa_register = 0x0d,
522 DW_CFA_def_cfa_offset = 0x0e,
523 DW_CFA_def_cfa_expression = 0x0f,
524 DW_CFA_expression = 0x10,
525 DW_CFA_offset_extended_sf = 0x11,
526 DW_CFA_def_cfa_sf = 0x12,
527 DW_CFA_def_cfa_offset_sf = 0x13,
528 DW_CFA_val_offset = 0x14,
529 DW_CFA_val_offset_sf = 0x15,
530 DW_CFA_val_expression = 0x16,
531 };
532
533 enum dwarf_operation
534 {
535 DW_OP_addr = 0x03,
536 DW_OP_deref = 0x06,
537 DW_OP_const1u = 0x08,
538 DW_OP_const1s = 0x09,
539 DW_OP_const2u = 0x0a,
540 DW_OP_const2s = 0x0b,
541 DW_OP_const4u = 0x0c,
542 DW_OP_const4s = 0x0d,
543 DW_OP_const8u = 0x0e,
544 DW_OP_const8s = 0x0f,
545 DW_OP_constu = 0x10,
546 DW_OP_consts = 0x11,
547 DW_OP_dup = 0x12,
548 DW_OP_drop = 0x13,
549 DW_OP_over = 0x14,
550 DW_OP_pick = 0x15,
551 DW_OP_swap = 0x16,
552 DW_OP_rot = 0x17,
553 DW_OP_xderef = 0x18,
554 DW_OP_abs = 0x19,
555 DW_OP_and = 0x1a,
556 DW_OP_div = 0x1b,
557 DW_OP_minus = 0x1c,
558 DW_OP_mod = 0x1d,
559 DW_OP_mul = 0x1e,
560 DW_OP_neg = 0x1f,
561 DW_OP_not = 0x20,
562 DW_OP_or = 0x21,
563 DW_OP_plus = 0x22,
564 DW_OP_plus_uconst = 0x23,
565 DW_OP_shl = 0x24,
566 DW_OP_shr = 0x25,
567 DW_OP_shra = 0x26,
568 DW_OP_xor = 0x27,
569 DW_OP_bra = 0x28,
570 DW_OP_eq = 0x29,
571 DW_OP_ge = 0x2a,
572 DW_OP_gt = 0x2b,
573 DW_OP_le = 0x2c,
574 DW_OP_lt = 0x2d,
575 DW_OP_ne = 0x2e,
576 DW_OP_skip = 0x2f,
577 DW_OP_lit0 = 0x30,
578 DW_OP_lit1 = 0x31,
579 DW_OP_lit2 = 0x32,
580 DW_OP_lit3 = 0x33,
581 DW_OP_lit4 = 0x34,
582 DW_OP_lit5 = 0x35,
583 DW_OP_lit6 = 0x36,
584 DW_OP_lit7 = 0x37,
585 DW_OP_lit8 = 0x38,
586 DW_OP_lit9 = 0x39,
587 DW_OP_lit10 = 0x3a,
588 DW_OP_lit11 = 0x3b,
589 DW_OP_lit12 = 0x3c,
590 DW_OP_lit13 = 0x3d,
591 DW_OP_lit14 = 0x3e,
592 DW_OP_lit15 = 0x3f,
593 DW_OP_lit16 = 0x40,
594 DW_OP_lit17 = 0x41,
595 DW_OP_lit18 = 0x42,
596 DW_OP_lit19 = 0x43,
597 DW_OP_lit20 = 0x44,
598 DW_OP_lit21 = 0x45,
599 DW_OP_lit22 = 0x46,
600 DW_OP_lit23 = 0x47,
601 DW_OP_lit24 = 0x48,
602 DW_OP_lit25 = 0x49,
603 DW_OP_lit26 = 0x4a,
604 DW_OP_lit27 = 0x4b,
605 DW_OP_lit28 = 0x4c,
606 DW_OP_lit29 = 0x4d,
607 DW_OP_lit30 = 0x4e,
608 DW_OP_lit31 = 0x4f,
609 DW_OP_reg0 = 0x50,
610 DW_OP_reg1 = 0x51,
611 DW_OP_reg2 = 0x52,
612 DW_OP_reg3 = 0x53,
613 DW_OP_reg4 = 0x54,
614 DW_OP_reg5 = 0x55,
615 DW_OP_reg6 = 0x56,
616 DW_OP_reg7 = 0x57,
617 DW_OP_reg8 = 0x58,
618 DW_OP_reg9 = 0x59,
619 DW_OP_reg10 = 0x5a,
620 DW_OP_reg11 = 0x5b,
621 DW_OP_reg12 = 0x5c,
622 DW_OP_reg13 = 0x5d,
623 DW_OP_reg14 = 0x5e,
624 DW_OP_reg15 = 0x5f,
625 DW_OP_reg16 = 0x60,
626 DW_OP_reg17 = 0x61,
627 DW_OP_reg18 = 0x62,
628 DW_OP_reg19 = 0x63,
629 DW_OP_reg20 = 0x64,
630 DW_OP_reg21 = 0x65,
631 DW_OP_reg22 = 0x66,
632 DW_OP_reg23 = 0x67,
633 DW_OP_reg24 = 0x68,
634 DW_OP_reg25 = 0x69,
635 DW_OP_reg26 = 0x6a,
636 DW_OP_reg27 = 0x6b,
637 DW_OP_reg28 = 0x6c,
638 DW_OP_reg29 = 0x6d,
639 DW_OP_reg30 = 0x6e,
640 DW_OP_reg31 = 0x6f,
641 DW_OP_breg0 = 0x70,
642 DW_OP_breg1 = 0x71,
643 DW_OP_breg2 = 0x72,
644 DW_OP_breg3 = 0x73,
645 DW_OP_breg4 = 0x74,
646 DW_OP_breg5 = 0x75,
647 DW_OP_breg6 = 0x76,
648 DW_OP_breg7 = 0x77,
649 DW_OP_breg8 = 0x78,
650 DW_OP_breg9 = 0x79,
651 DW_OP_breg10 = 0x7a,
652 DW_OP_breg11 = 0x7b,
653 DW_OP_breg12 = 0x7c,
654 DW_OP_breg13 = 0x7d,
655 DW_OP_breg14 = 0x7e,
656 DW_OP_breg15 = 0x7f,
657 DW_OP_breg16 = 0x80,
658 DW_OP_breg17 = 0x81,
659 DW_OP_breg18 = 0x82,
660 DW_OP_breg19 = 0x83,
661 DW_OP_breg20 = 0x84,
662 DW_OP_breg21 = 0x85,
663 DW_OP_breg22 = 0x86,
664 DW_OP_breg23 = 0x87,
665 DW_OP_breg24 = 0x88,
666 DW_OP_breg25 = 0x89,
667 DW_OP_breg26 = 0x8a,
668 DW_OP_breg27 = 0x8b,
669 DW_OP_breg28 = 0x8c,
670 DW_OP_breg29 = 0x8d,
671 DW_OP_breg30 = 0x8e,
672 DW_OP_breg31 = 0x8f,
673 DW_OP_regx = 0x90,
674 DW_OP_fbreg = 0x91,
675 DW_OP_bregx = 0x92,
676 DW_OP_piece = 0x93,
677 DW_OP_deref_size = 0x94,
678 DW_OP_xderef_size = 0x95,
679 DW_OP_nop = 0x96,
680 DW_OP_push_object_address = 0x97,
681 DW_OP_call2 = 0x98,
682 DW_OP_call4 = 0x99,
683 DW_OP_call_ref = 0x9a,
684 DW_OP_form_tls_address = 0x9b,
685 DW_OP_call_frame_cfa = 0x9c,
686 DW_OP_bit_piece = 0x9d,
687 DW_OP_lo_user = 0xe0,
688 DW_OP_hi_user = 0xff,
689 DW_OP_GNU_push_tls_address = 0xe0,
690 DW_OP_GNU_uninit = 0xf0,
691 DW_OP_GNU_encoded_addr = 0xf1,
692 };
693
694 #define DW_EH_PE_native 0x00
695 #define DW_EH_PE_leb128 0x01
696 #define DW_EH_PE_data2 0x02
697 #define DW_EH_PE_data4 0x03
698 #define DW_EH_PE_data8 0x04
699 #define DW_EH_PE_signed 0x08
700 #define DW_EH_PE_abs 0x00
701 #define DW_EH_PE_pcrel 0x10
702 #define DW_EH_PE_textrel 0x20
703 #define DW_EH_PE_datarel 0x30
704 #define DW_EH_PE_funcrel 0x40
705 #define DW_EH_PE_aligned 0x50
706 #define DW_EH_PE_indirect 0x80
707 #define DW_EH_PE_omit 0xff
708
709 struct dwarf_eh_bases
710 {
711 void *tbase;
712 void *dbase;
713 void *func;
714 };
715
716 struct dwarf_cie
717 {
718 unsigned int length;
719 int id;
720 unsigned char version;
721 unsigned char augmentation[1];
722 };
723
724 struct dwarf_fde
725 {
726 unsigned int length;
727 unsigned int cie_offset;
728 };
729
730 extern const struct dwarf_fde *_Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
731
732 static unsigned char dwarf_get_u1( const unsigned char **p )
733 {
734 return *(*p)++;
735 }
736
737 static unsigned short dwarf_get_u2( const unsigned char **p )
738 {
739 unsigned int ret = (*p)[0] | ((*p)[1] << 8);
740 (*p) += 2;
741 return ret;
742 }
743
744 static unsigned int dwarf_get_u4( const unsigned char **p )
745 {
746 unsigned int ret = (*p)[0] | ((*p)[1] << 8) | ((*p)[2] << 16) | ((*p)[3] << 24);
747 (*p) += 4;
748 return ret;
749 }
750
751 static ULONG64 dwarf_get_u8( const unsigned char **p )
752 {
753 ULONG64 low = dwarf_get_u4( p );
754 ULONG64 high = dwarf_get_u4( p );
755 return low | (high << 32);
756 }
757
758 static ULONG_PTR dwarf_get_uleb128( const unsigned char **p )
759 {
760 ULONG_PTR ret = 0;
761 unsigned int shift = 0;
762 unsigned char byte;
763
764 do
765 {
766 byte = **p;
767 ret |= (ULONG_PTR)(byte & 0x7f) << shift;
768 shift += 7;
769 (*p)++;
770 } while (byte & 0x80);
771 return ret;
772 }
773
774 static LONG_PTR dwarf_get_sleb128( const unsigned char **p )
775 {
776 ULONG_PTR ret = 0;
777 unsigned int shift = 0;
778 unsigned char byte;
779
780 do
781 {
782 byte = **p;
783 ret |= (ULONG_PTR)(byte & 0x7f) << shift;
784 shift += 7;
785 (*p)++;
786 } while (byte & 0x80);
787
788 if ((shift < 8 * sizeof(ret)) && (byte & 0x40)) ret |= -((ULONG_PTR)1 << shift);
789 return ret;
790 }
791
792 static ULONG_PTR dwarf_get_ptr( const unsigned char **p, unsigned char encoding )
793 {
794 ULONG_PTR base;
795
796 if (encoding == DW_EH_PE_omit) return 0;
797
798 switch (encoding & 0xf0)
799 {
800 case DW_EH_PE_abs:
801 base = 0;
802 break;
803 case DW_EH_PE_pcrel:
804 base = (ULONG_PTR)*p;
805 break;
806 default:
807 FIXME( "unsupported encoding %02x\n", encoding );
808 return 0;
809 }
810
811 switch (encoding & 0x0f)
812 {
813 case DW_EH_PE_native:
814 return base + dwarf_get_u8( p );
815 case DW_EH_PE_leb128:
816 return base + dwarf_get_uleb128( p );
817 case DW_EH_PE_data2:
818 return base + dwarf_get_u2( p );
819 case DW_EH_PE_data4:
820 return base + dwarf_get_u4( p );
821 case DW_EH_PE_data8:
822 return base + dwarf_get_u8( p );
823 case DW_EH_PE_signed|DW_EH_PE_leb128:
824 return base + dwarf_get_sleb128( p );
825 case DW_EH_PE_signed|DW_EH_PE_data2:
826 return base + (signed short)dwarf_get_u2( p );
827 case DW_EH_PE_signed|DW_EH_PE_data4:
828 return base + (signed int)dwarf_get_u4( p );
829 case DW_EH_PE_signed|DW_EH_PE_data8:
830 return base + (LONG64)dwarf_get_u8( p );
831 default:
832 FIXME( "unsupported encoding %02x\n", encoding );
833 return 0;
834 }
835 }
836
837 enum reg_rule
838 {
839 RULE_UNSET, /* not set at all */
840 RULE_UNDEFINED, /* undefined value */
841 RULE_SAME, /* same value as previous frame */
842 RULE_CFA_OFFSET, /* stored at cfa offset */
843 RULE_OTHER_REG, /* stored in other register */
844 RULE_EXPRESSION, /* address specified by expression */
845 RULE_VAL_EXPRESSION /* value specified by expression */
846 };
847
848 #define NB_FRAME_REGS 41
849 #define MAX_SAVED_STATES 16
850
851 struct frame_state
852 {
853 ULONG_PTR cfa_offset;
854 unsigned char cfa_reg;
855 enum reg_rule cfa_rule;
856 enum reg_rule rules[NB_FRAME_REGS];
857 ULONG64 regs[NB_FRAME_REGS];
858 };
859
860 struct frame_info
861 {
862 ULONG_PTR ip;
863 ULONG_PTR code_align;
864 LONG_PTR data_align;
865 unsigned char retaddr_reg;
866 unsigned char fde_encoding;
867 unsigned char signal_frame;
868 unsigned char state_sp;
869 struct frame_state state;
870 struct frame_state *state_stack;
871 };
872
873 static const char *dwarf_reg_names[NB_FRAME_REGS] =
874 {
875 /* 0-7 */ "%rax", "%rdx", "%rcx", "%rbx", "%rsi", "%rdi", "%rbp", "%rsp",
876 /* 8-16 */ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%rip",
877 /* 17-24 */ "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7",
878 /* 25-32 */ "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15",
879 /* 33-40 */ "%st0", "%st1", "%st2", "%st3", "%st4", "%st5", "%st6", "%st7"
880 };
881
882 static BOOL valid_reg( ULONG_PTR reg )
883 {
884 if (reg >= NB_FRAME_REGS) FIXME( "unsupported reg %lx\n", reg );
885 return (reg < NB_FRAME_REGS);
886 }
887
888 static void execute_cfa_instructions( const unsigned char *ptr, const unsigned char *end,
889 ULONG_PTR last_ip, struct frame_info *info )
890 {
891 while (ptr < end && info->ip < last_ip + info->signal_frame)
892 {
893 enum dwarf_call_frame_info op = *ptr++;
894
895 if (op & 0xc0)
896 {
897 switch (op & 0xc0)
898 {
899 case DW_CFA_advance_loc:
900 {
901 ULONG_PTR offset = (op & 0x3f) * info->code_align;
902 TRACE( "%lx: DW_CFA_advance_loc %lu\n", info->ip, offset );
903 info->ip += offset;
904 break;
905 }
906 case DW_CFA_offset:
907 {
908 ULONG_PTR reg = op & 0x3f;
909 LONG_PTR offset = dwarf_get_uleb128( &ptr ) * info->data_align;
910 if (!valid_reg( reg )) break;
911 TRACE( "%lx: DW_CFA_offset %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
912 info->state.regs[reg] = offset;
913 info->state.rules[reg] = RULE_CFA_OFFSET;
914 break;
915 }
916 case DW_CFA_restore:
917 {
918 ULONG_PTR reg = op & 0x3f;
919 if (!valid_reg( reg )) break;
920 TRACE( "%lx: DW_CFA_restore %s\n", info->ip, dwarf_reg_names[reg] );
921 info->state.rules[reg] = RULE_UNSET;
922 break;
923 }
924 }
925 }
926 else switch (op)
927 {
928 case DW_CFA_nop:
929 break;
930 case DW_CFA_set_loc:
931 {
932 ULONG_PTR loc = dwarf_get_ptr( &ptr, info->fde_encoding );
933 TRACE( "%lx: DW_CFA_set_loc %lx\n", info->ip, loc );
934 info->ip = loc;
935 break;
936 }
937 case DW_CFA_advance_loc1:
938 {
939 ULONG_PTR offset = *ptr++ * info->code_align;
940 TRACE( "%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset );
941 info->ip += offset;
942 break;
943 }
944 case DW_CFA_advance_loc2:
945 {
946 ULONG_PTR offset = dwarf_get_u2( &ptr ) * info->code_align;
947 TRACE( "%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset );
948 info->ip += offset;
949 break;
950 }
951 case DW_CFA_advance_loc4:
952 {
953 ULONG_PTR offset = dwarf_get_u4( &ptr ) * info->code_align;
954 TRACE( "%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset );
955 info->ip += offset;
956 break;
957 }
958 case DW_CFA_offset_extended:
959 case DW_CFA_offset_extended_sf:
960 {
961 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
962 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf_get_uleb128( &ptr ) * info->data_align
963 : dwarf_get_sleb128( &ptr ) * info->data_align;
964 if (!valid_reg( reg )) break;
965 TRACE( "%lx: DW_CFA_offset_extended %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
966 info->state.regs[reg] = offset;
967 info->state.rules[reg] = RULE_CFA_OFFSET;
968 break;
969 }
970 case DW_CFA_restore_extended:
971 {
972 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
973 if (!valid_reg( reg )) break;
974 TRACE( "%lx: DW_CFA_restore_extended %s\n", info->ip, dwarf_reg_names[reg] );
975 info->state.rules[reg] = RULE_UNSET;
976 break;
977 }
978 case DW_CFA_undefined:
979 {
980 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
981 if (!valid_reg( reg )) break;
982 TRACE( "%lx: DW_CFA_undefined %s\n", info->ip, dwarf_reg_names[reg] );
983 info->state.rules[reg] = RULE_UNDEFINED;
984 break;
985 }
986 case DW_CFA_same_value:
987 {
988 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
989 if (!valid_reg( reg )) break;
990 TRACE( "%lx: DW_CFA_same_value %s\n", info->ip, dwarf_reg_names[reg] );
991 info->state.regs[reg] = reg;
992 info->state.rules[reg] = RULE_SAME;
993 break;
994 }
995 case DW_CFA_register:
996 {
997 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
998 ULONG_PTR reg2 = dwarf_get_uleb128( &ptr );
999 if (!valid_reg( reg ) || !valid_reg( reg2 )) break;
1000 TRACE( "%lx: DW_CFA_register %s == %s\n", info->ip, dwarf_reg_names[reg], dwarf_reg_names[reg2] );
1001 info->state.regs[reg] = reg2;
1002 info->state.rules[reg] = RULE_OTHER_REG;
1003 break;
1004 }
1005 case DW_CFA_remember_state:
1006 TRACE( "%lx: DW_CFA_remember_state\n", info->ip );
1007 if (info->state_sp >= MAX_SAVED_STATES)
1008 FIXME( "%lx: DW_CFA_remember_state too many nested saves\n", info->ip );
1009 else
1010 info->state_stack[info->state_sp++] = info->state;
1011 break;
1012 case DW_CFA_restore_state:
1013 TRACE( "%lx: DW_CFA_restore_state\n", info->ip );
1014 if (!info->state_sp)
1015 FIXME( "%lx: DW_CFA_restore_state without corresponding save\n", info->ip );
1016 else
1017 info->state = info->state_stack[--info->state_sp];
1018 break;
1019 case DW_CFA_def_cfa:
1020 case DW_CFA_def_cfa_sf:
1021 {
1022 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1023 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf_get_uleb128( &ptr )
1024 : dwarf_get_sleb128( &ptr ) * info->data_align;
1025 if (!valid_reg( reg )) break;
1026 TRACE( "%lx: DW_CFA_def_cfa %s, %lu\n", info->ip, dwarf_reg_names[reg], offset );
1027 info->state.cfa_reg = reg;
1028 info->state.cfa_offset = offset;
1029 info->state.cfa_rule = RULE_CFA_OFFSET;
1030 break;
1031 }
1032 case DW_CFA_def_cfa_register:
1033 {
1034 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1035 if (!valid_reg( reg )) break;
1036 TRACE( "%lx: DW_CFA_def_cfa_register %s\n", info->ip, dwarf_reg_names[reg] );
1037 info->state.cfa_reg = reg;
1038 info->state.cfa_rule = RULE_CFA_OFFSET;
1039 break;
1040 }
1041 case DW_CFA_def_cfa_offset:
1042 case DW_CFA_def_cfa_offset_sf:
1043 {
1044 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf_get_uleb128( &ptr )
1045 : dwarf_get_sleb128( &ptr ) * info->data_align;
1046 TRACE( "%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset );
1047 info->state.cfa_offset = offset;
1048 info->state.cfa_rule = RULE_CFA_OFFSET;
1049 break;
1050 }
1051 case DW_CFA_def_cfa_expression:
1052 {
1053 ULONG_PTR expr = (ULONG_PTR)ptr;
1054 ULONG_PTR len = dwarf_get_uleb128( &ptr );
1055 TRACE( "%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len );
1056 info->state.cfa_offset = expr;
1057 info->state.cfa_rule = RULE_VAL_EXPRESSION;
1058 ptr += len;
1059 break;
1060 }
1061 case DW_CFA_expression:
1062 case DW_CFA_val_expression:
1063 {
1064 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1065 ULONG_PTR expr = (ULONG_PTR)ptr;
1066 ULONG_PTR len = dwarf_get_uleb128( &ptr );
1067 if (!valid_reg( reg )) break;
1068 TRACE( "%lx: DW_CFA_%sexpression %s %lx-%lx\n",
1069 info->ip, (op == DW_CFA_expression) ? "" : "val_", dwarf_reg_names[reg], expr, expr+len );
1070 info->state.regs[reg] = expr;
1071 info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
1072 ptr += len;
1073 break;
1074 }
1075 default:
1076 FIXME( "%lx: unknown CFA opcode %02x\n", info->ip, op );
1077 break;
1078 }
1079 }
1080 }
1081
1082 /* retrieve a context register from its dwarf number */
1083 static void *get_context_reg( CONTEXT *context, ULONG_PTR dw_reg )
1084 {
1085 switch (dw_reg)
1086 {
1087 case 0: return &context->Rax;
1088 case 1: return &context->Rdx;
1089 case 2: return &context->Rcx;
1090 case 3: return &context->Rbx;
1091 case 4: return &context->Rsi;
1092 case 5: return &context->Rdi;
1093 case 6: return &context->Rbp;
1094 case 7: return &context->Rsp;
1095 case 8: return &context->R8;
1096 case 9: return &context->R9;
1097 case 10: return &context->R10;
1098 case 11: return &context->R11;
1099 case 12: return &context->R12;
1100 case 13: return &context->R13;
1101 case 14: return &context->R14;
1102 case 15: return &context->R15;
1103 case 16: return &context->Rip;
1104 case 17: return &context->u.s.Xmm0;
1105 case 18: return &context->u.s.Xmm1;
1106 case 19: return &context->u.s.Xmm2;
1107 case 20: return &context->u.s.Xmm3;
1108 case 21: return &context->u.s.Xmm4;
1109 case 22: return &context->u.s.Xmm5;
1110 case 23: return &context->u.s.Xmm6;
1111 case 24: return &context->u.s.Xmm7;
1112 case 25: return &context->u.s.Xmm8;
1113 case 26: return &context->u.s.Xmm9;
1114 case 27: return &context->u.s.Xmm10;
1115 case 28: return &context->u.s.Xmm11;
1116 case 29: return &context->u.s.Xmm12;
1117 case 30: return &context->u.s.Xmm13;
1118 case 31: return &context->u.s.Xmm14;
1119 case 32: return &context->u.s.Xmm15;
1120 case 33: return &context->u.s.Legacy[0];
1121 case 34: return &context->u.s.Legacy[1];
1122 case 35: return &context->u.s.Legacy[2];
1123 case 36: return &context->u.s.Legacy[3];
1124 case 37: return &context->u.s.Legacy[4];
1125 case 38: return &context->u.s.Legacy[5];
1126 case 39: return &context->u.s.Legacy[6];
1127 case 40: return &context->u.s.Legacy[7];
1128 default: return NULL;
1129 }
1130 }
1131
1132 /* set a context register from its dwarf number */
1133 static void set_context_reg( CONTEXT *context, ULONG_PTR dw_reg, void *val )
1134 {
1135 switch (dw_reg)
1136 {
1137 case 0: context->Rax = *(ULONG64 *)val; break;
1138 case 1: context->Rdx = *(ULONG64 *)val; break;
1139 case 2: context->Rcx = *(ULONG64 *)val; break;
1140 case 3: context->Rbx = *(ULONG64 *)val; break;
1141 case 4: context->Rsi = *(ULONG64 *)val; break;
1142 case 5: context->Rdi = *(ULONG64 *)val; break;
1143 case 6: context->Rbp = *(ULONG64 *)val; break;
1144 case 7: context->Rsp = *(ULONG64 *)val; break;
1145 case 8: context->R8 = *(ULONG64 *)val; break;
1146 case 9: context->R9 = *(ULONG64 *)val; break;
1147 case 10: context->R10 = *(ULONG64 *)val; break;
1148 case 11: context->R11 = *(ULONG64 *)val; break;
1149 case 12: context->R12 = *(ULONG64 *)val; break;
1150 case 13: context->R13 = *(ULONG64 *)val; break;
1151 case 14: context->R14 = *(ULONG64 *)val; break;
1152 case 15: context->R15 = *(ULONG64 *)val; break;
1153 case 16: context->Rip = *(ULONG64 *)val; break;
1154 case 17: context->u.s.Xmm0 = *(M128A *)val; break;
1155 case 18: context->u.s.Xmm1 = *(M128A *)val; break;
1156 case 19: context->u.s.Xmm2 = *(M128A *)val; break;
1157 case 20: context->u.s.Xmm3 = *(M128A *)val; break;
1158 case 21: context->u.s.Xmm4 = *(M128A *)val; break;
1159 case 22: context->u.s.Xmm5 = *(M128A *)val; break;
1160 case 23: context->u.s.Xmm6 = *(M128A *)val; break;
1161 case 24: context->u.s.Xmm7 = *(M128A *)val; break;
1162 case 25: context->u.s.Xmm8 = *(M128A *)val; break;
1163 case 26: context->u.s.Xmm9 = *(M128A *)val; break;
1164 case 27: context->u.s.Xmm10 = *(M128A *)val; break;
1165 case 28: context->u.s.Xmm11 = *(M128A *)val; break;
1166 case 29: context->u.s.Xmm12 = *(M128A *)val; break;
1167 case 30: context->u.s.Xmm13 = *(M128A *)val; break;
1168 case 31: context->u.s.Xmm14 = *(M128A *)val; break;
1169 case 32: context->u.s.Xmm15 = *(M128A *)val; break;
1170 case 33: context->u.s.Legacy[0] = *(M128A *)val; break;
1171 case 34: context->u.s.Legacy[1] = *(M128A *)val; break;
1172 case 35: context->u.s.Legacy[2] = *(M128A *)val; break;
1173 case 36: context->u.s.Legacy[3] = *(M128A *)val; break;
1174 case 37: context->u.s.Legacy[4] = *(M128A *)val; break;
1175 case 38: context->u.s.Legacy[5] = *(M128A *)val; break;
1176 case 39: context->u.s.Legacy[6] = *(M128A *)val; break;
1177 case 40: context->u.s.Legacy[7] = *(M128A *)val; break;
1178 }
1179 }
1180
1181 static ULONG_PTR eval_expression( const unsigned char *p, CONTEXT *context )
1182 {
1183 ULONG_PTR reg, tmp, stack[64];
1184 int sp = -1;
1185 ULONG_PTR len = dwarf_get_uleb128(&p);
1186 const unsigned char *end = p + len;
1187
1188 while (p < end)
1189 {
1190 unsigned char opcode = dwarf_get_u1(&p);
1191
1192 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
1193 stack[++sp] = opcode - DW_OP_lit0;
1194 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
1195 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_reg0 );
1196 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
1197 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_breg0 ) + dwarf_get_sleb128(&p);
1198 else switch (opcode)
1199 {
1200 case DW_OP_nop: break;
1201 case DW_OP_addr: stack[++sp] = dwarf_get_u8(&p); break;
1202 case DW_OP_const1u: stack[++sp] = dwarf_get_u1(&p); break;
1203 case DW_OP_const1s: stack[++sp] = (signed char)dwarf_get_u1(&p); break;
1204 case DW_OP_const2u: stack[++sp] = dwarf_get_u2(&p); break;
1205 case DW_OP_const2s: stack[++sp] = (short)dwarf_get_u2(&p); break;
1206 case DW_OP_const4u: stack[++sp] = dwarf_get_u4(&p); break;
1207 case DW_OP_const4s: stack[++sp] = (signed int)dwarf_get_u4(&p); break;
1208 case DW_OP_const8u: stack[++sp] = dwarf_get_u8(&p); break;
1209 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf_get_u8(&p); break;
1210 case DW_OP_constu: stack[++sp] = dwarf_get_uleb128(&p); break;
1211 case DW_OP_consts: stack[++sp] = dwarf_get_sleb128(&p); break;
1212 case DW_OP_deref: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
1213 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
1214 case DW_OP_drop: sp--; break;
1215 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
1216 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf_get_u1(&p)]; sp++; break;
1217 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
1218 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
1219 case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
1220 case DW_OP_neg: stack[sp] = -stack[sp]; break;
1221 case DW_OP_not: stack[sp] = ~stack[sp]; break;
1222 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
1223 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
1224 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
1225 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
1226 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
1227 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
1228 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
1229 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
1230 case DW_OP_plus_uconst: stack[sp] += dwarf_get_uleb128(&p); break;
1231 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
1232 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
1233 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
1234 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
1235 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
1236 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
1237 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
1238 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
1239 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
1240 case DW_OP_skip: tmp = (short)dwarf_get_u2(&p); p += tmp; break;
1241 case DW_OP_bra: tmp = (short)dwarf_get_u2(&p); if (!stack[sp--]) p += tmp; break;
1242 case DW_OP_GNU_encoded_addr: tmp = *p++; stack[++sp] = dwarf_get_ptr( &p, tmp ); break;
1243 case DW_OP_regx: stack[++sp] = *(ULONG_PTR *)get_context_reg( context, dwarf_get_uleb128(&p) ); break;
1244 case DW_OP_bregx:
1245 reg = dwarf_get_uleb128(&p);
1246 tmp = dwarf_get_sleb128(&p);
1247 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, reg ) + tmp;
1248 break;
1249 case DW_OP_deref_size:
1250 switch (*p++)
1251 {
1252 case 1: stack[sp] = *(unsigned char *)stack[sp]; break;
1253 case 2: stack[sp] = *(unsigned short *)stack[sp]; break;
1254 case 4: stack[sp] = *(unsigned int *)stack[sp]; break;
1255 case 8: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
1256 }
1257 break;
1258 default:
1259 FIXME( "unhandled opcode %02x\n", opcode );
1260 }
1261 }
1262 return stack[sp];
1263 }
1264
1265 /* apply the computed frame info to the actual context */
1266 static void apply_frame_state( CONTEXT *context, struct frame_state *state )
1267 {
1268 unsigned int i;
1269 ULONG_PTR cfa, value;
1270 CONTEXT new_context = *context;
1271
1272 switch (state->cfa_rule)
1273 {
1274 case RULE_EXPRESSION:
1275 cfa = *(ULONG_PTR *)eval_expression( (const unsigned char *)state->cfa_offset, context );
1276 break;
1277 case RULE_VAL_EXPRESSION:
1278 cfa = eval_expression( (const unsigned char *)state->cfa_offset, context );
1279 break;
1280 default:
1281 cfa = *(ULONG_PTR *)get_context_reg( context, state->cfa_reg ) + state->cfa_offset;
1282 break;
1283 }
1284 if (!cfa) return;
1285
1286 for (i = 0; i < NB_FRAME_REGS; i++)
1287 {
1288 switch (state->rules[i])
1289 {
1290 case RULE_UNSET:
1291 case RULE_UNDEFINED:
1292 case RULE_SAME:
1293 break;
1294 case RULE_CFA_OFFSET:
1295 set_context_reg( &new_context, i, (char *)cfa + state->regs[i] );
1296 break;
1297 case RULE_OTHER_REG:
1298 set_context_reg( &new_context, i, get_context_reg( context, state->regs[i] ));
1299 break;
1300 case RULE_EXPRESSION:
1301 value = eval_expression( (const unsigned char *)state->regs[i], context );
1302 set_context_reg( &new_context, i, (void *)value );
1303 break;
1304 case RULE_VAL_EXPRESSION:
1305 value = eval_expression( (const unsigned char *)state->regs[i], context );
1306 set_context_reg( &new_context, i, &value );
1307 break;
1308 }
1309 }
1310 new_context.Rsp = cfa;
1311 *context = new_context;
1312 }
1313
1314
1315 /***********************************************************************
1316 * dwarf_virtual_unwind
1317 *
1318 * Equivalent of RtlVirtualUnwind for builtin modules.
1319 */
1320 static NTSTATUS dwarf_virtual_unwind( ULONG64 ip, ULONG64 *frame,CONTEXT *context,
1321 const struct dwarf_fde *fde, const struct dwarf_eh_bases *bases,
1322 PEXCEPTION_ROUTINE *handler, void **handler_data )
1323 {
1324 const struct dwarf_cie *cie;
1325 const unsigned char *ptr, *augmentation, *end;
1326 ULONG_PTR len, code_end;
1327 struct frame_info info;
1328 struct frame_state state_stack[MAX_SAVED_STATES];
1329 int aug_z_format = 0;
1330 unsigned char lsda_encoding = DW_EH_PE_omit;
1331
1332 memset( &info, 0, sizeof(info) );
1333 info.state_stack = state_stack;
1334 info.ip = (ULONG_PTR)bases->func;
1335 *handler = NULL;
1336
1337 cie = (const struct dwarf_cie *)((const char *)&fde->cie_offset - fde->cie_offset);
1338
1339 /* parse the CIE first */
1340
1341 if (cie->version != 1)
1342 {
1343 FIXME( "unknown CIE version %u at %p\n", cie->version, cie );
1344 return STATUS_INVALID_DISPOSITION;
1345 }
1346 ptr = cie->augmentation + strlen((const char *)cie->augmentation) + 1;
1347
1348 info.code_align = dwarf_get_uleb128( &ptr );
1349 info.data_align = dwarf_get_sleb128( &ptr );
1350 info.retaddr_reg = *ptr++;
1351 info.state.cfa_rule = RULE_CFA_OFFSET;
1352
1353 TRACE( "function %lx base %p cie %p len %x id %x version %x aug '%s' code_align %lu data_align %ld retaddr %s\n",
1354 ip, bases->func, cie, cie->length, cie->id, cie->version, cie->augmentation,
1355 info.code_align, info.data_align, dwarf_reg_names[info.retaddr_reg] );
1356
1357 end = NULL;
1358 for (augmentation = cie->augmentation; *augmentation; augmentation++)
1359 {
1360 switch (*augmentation)
1361 {
1362 case 'z':
1363 len = dwarf_get_uleb128( &ptr );
1364 end = ptr + len;
1365 aug_z_format = 1;
1366 continue;
1367 case 'L':
1368 lsda_encoding = *ptr++;
1369 continue;
1370 case 'P':
1371 {
1372 unsigned char encoding = *ptr++;
1373 *handler = (void *)dwarf_get_ptr( &ptr, encoding );
1374 continue;
1375 }
1376 case 'R':
1377 info.fde_encoding = *ptr++;
1378 continue;
1379 case 'S':
1380 info.signal_frame = 1;
1381 continue;
1382 }
1383 FIXME( "unknown augmentation '%c'\n", *augmentation );
1384 if (!end) return STATUS_INVALID_DISPOSITION; /* cannot continue */
1385 break;
1386 }
1387 if (end) ptr = end;
1388
1389 end = (const unsigned char *)(&cie->length + 1) + cie->length;
1390 execute_cfa_instructions( ptr, end, ip, &info );
1391
1392 ptr = (const unsigned char *)(fde + 1);
1393 info.ip = dwarf_get_ptr( &ptr, info.fde_encoding ); /* fde code start */
1394 code_end = info.ip + dwarf_get_ptr( &ptr, info.fde_encoding & 0x0f ); /* fde code length */
1395
1396 if (aug_z_format) /* get length of augmentation data */
1397 {
1398 len = dwarf_get_uleb128( &ptr );
1399 end = ptr + len;
1400 }
1401 else end = NULL;
1402
1403 *handler_data = (void *)dwarf_get_ptr( &ptr, lsda_encoding );
1404 if (end) ptr = end;
1405
1406 end = (const unsigned char *)(&fde->length + 1) + fde->length;
1407 TRACE( "fde %p len %x personality %p lsda %p code %lx-%lx\n",
1408 fde, fde->length, *handler, *handler_data, info.ip, code_end );
1409 execute_cfa_instructions( ptr, end, ip, &info );
1410 *frame = context->Rsp;
1411 apply_frame_state( context, &info.state );
1412
1413 TRACE( "next function rip=%016lx\n", context->Rip );
1414 TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
1415 context->Rax, context->Rbx, context->Rcx, context->Rdx );
1416 TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
1417 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
1418 TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
1419 context->R8, context->R9, context->R10, context->R11 );
1420 TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
1421 context->R12, context->R13, context->R14, context->R15 );
1422
1423 return STATUS_SUCCESS;
1424 }
1425
1426
1427 /***********************************************************************
1428 * dispatch_signal
1429 */
1430 static inline int dispatch_signal(unsigned int sig)
1431 {
1432 if (handlers[sig] == NULL) return 0;
1433 return handlers[sig](sig);
1434 }
1435
1436 /***********************************************************************
1437 * get_signal_stack
1438 *
1439 * Get the base of the signal stack for the current thread.
1440 */
1441 static inline void *get_signal_stack(void)
1442 {
1443 return (char *)NtCurrentTeb() + teb_size;
1444 }
1445
1446 /***********************************************************************
1447 * is_inside_signal_stack
1448 *
1449 * Check if pointer is inside the signal stack.
1450 */
1451 static inline BOOL is_inside_signal_stack( void *ptr )
1452 {
1453 return ((char *)ptr >= (char *)get_signal_stack() &&
1454 (char *)ptr < (char *)get_signal_stack() + signal_stack_size);
1455 }
1456
1457 /***********************************************************************
1458 * save_context
1459 *
1460 * Set the register values from a sigcontext.
1461 */
1462 static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
1463 {
1464 context->ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS;
1465 context->Rax = RAX_sig(sigcontext);
1466 context->Rcx = RCX_sig(sigcontext);
1467 context->Rdx = RDX_sig(sigcontext);
1468 context->Rbx = RBX_sig(sigcontext);
1469 context->Rsp = RSP_sig(sigcontext);
1470 context->Rbp = RBP_sig(sigcontext);
1471 context->Rsi = RSI_sig(sigcontext);
1472 context->Rdi = RDI_sig(sigcontext);
1473 context->R8 = R8_sig(sigcontext);
1474 context->R9 = R9_sig(sigcontext);
1475 context->R10 = R10_sig(sigcontext);
1476 context->R11 = R11_sig(sigcontext);
1477 context->R12 = R12_sig(sigcontext);
1478 context->R13 = R13_sig(sigcontext);
1479 context->R14 = R14_sig(sigcontext);
1480 context->R15 = R15_sig(sigcontext);
1481 context->Rip = RIP_sig(sigcontext);
1482 context->SegCs = CS_sig(sigcontext);
1483 context->SegFs = FS_sig(sigcontext);
1484 context->SegGs = GS_sig(sigcontext);
1485 context->EFlags = EFL_sig(sigcontext);
1486 #ifdef DS_sig
1487 context->SegDs = DS_sig(sigcontext);
1488 #else
1489 __asm__("movw %%ds,%0" : "=m" (context->SegDs));
1490 #endif
1491 #ifdef ES_sig
1492 context->SegEs = ES_sig(sigcontext);
1493 #else
1494 __asm__("movw %%es,%0" : "=m" (context->SegEs));
1495 #endif
1496 #ifdef SS_sig
1497 context->SegSs = SS_sig(sigcontext);
1498 #else
1499 __asm__("movw %%ss,%0" : "=m" (context->SegSs));
1500 #endif
1501 if (FPU_sig(sigcontext))
1502 {
1503 context->ContextFlags |= CONTEXT_FLOATING_POINT;
1504 context->u.FltSave = *FPU_sig(sigcontext);
1505 context->MxCsr = context->u.FltSave.MxCsr;
1506 }
1507 }
1508
1509
1510 /***********************************************************************
1511 * restore_context
1512 *
1513 * Build a sigcontext from the register values.
1514 */
1515 static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
1516 {
1517 RAX_sig(sigcontext) = context->Rax;
1518 RCX_sig(sigcontext) = context->Rcx;
1519 RDX_sig(sigcontext) = context->Rdx;
1520 RBX_sig(sigcontext) = context->Rbx;
1521 RSP_sig(sigcontext) = context->Rsp;
1522 RBP_sig(sigcontext) = context->Rbp;
1523 RSI_sig(sigcontext) = context->Rsi;
1524 RDI_sig(sigcontext) = context->Rdi;
1525 R8_sig(sigcontext) = context->R8;
1526 R9_sig(sigcontext) = context->R9;
1527 R10_sig(sigcontext) = context->R10;
1528 R11_sig(sigcontext) = context->R11;
1529 R12_sig(sigcontext) = context->R12;
1530 R13_sig(sigcontext) = context->R13;
1531 R14_sig(sigcontext) = context->R14;
1532 R15_sig(sigcontext) = context->R15;
1533 RIP_sig(sigcontext) = context->Rip;
1534 CS_sig(sigcontext) = context->SegCs;
1535 FS_sig(sigcontext) = context->SegFs;
1536 GS_sig(sigcontext) = context->SegGs;
1537 EFL_sig(sigcontext) = context->EFlags;
1538 #ifdef DS_sig
1539 DS_sig(sigcontext) = context->SegDs;
1540 #endif
1541 #ifdef ES_sig
1542 ES_sig(sigcontext) = context->SegEs;
1543 #endif
1544 #ifdef SS_sig
1545 SS_sig(sigcontext) = context->SegSs;
1546 #endif
1547 if (FPU_sig(sigcontext)) *FPU_sig(sigcontext) = context->u.FltSave;
1548 }
1549
1550
1551 /**************************************************************************
1552 * __chkstk (NTDLL.@)
1553 *
1554 * Supposed to touch all the stack pages, but we shouldn't need that.
1555 */
1556 __ASM_GLOBAL_FUNC( __chkstk, "ret" );
1557
1558
1559 /***********************************************************************
1560 * RtlCaptureContext (NTDLL.@)
1561 */
1562 __ASM_GLOBAL_FUNC( RtlCaptureContext,
1563 "pushfq\n\t"
1564 __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
1565 "movl $0x001000f,0x30(%rcx)\n\t" /* context->ContextFlags */
1566 "stmxcsr 0x34(%rcx)\n\t" /* context->MxCsr */
1567 "movw %cs,0x38(%rcx)\n\t" /* context->SegCs */
1568 "movw %ds,0x3a(%rcx)\n\t" /* context->SegDs */
1569 "movw %es,0x3c(%rcx)\n\t" /* context->SegEs */
1570 "movw %fs,0x3e(%rcx)\n\t" /* context->SegFs */
1571 "movw %gs,0x40(%rcx)\n\t" /* context->SegGs */
1572 "movw %ss,0x42(%rcx)\n\t" /* context->SegSs */
1573 "popq 0x44(%rcx)\n\t" /* context->Eflags */
1574 __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
1575 "movq %rax,0x78(%rcx)\n\t" /* context->Rax */
1576 "movq %rcx,0x80(%rcx)\n\t" /* context->Rcx */
1577 "movq %rdx,0x88(%rcx)\n\t" /* context->Rdx */
1578 "movq %rbx,0x90(%rcx)\n\t" /* context->Rbx */
1579 "leaq 8(%rsp),%rax\n\t"
1580 "movq %rax,0x98(%rcx)\n\t" /* context->Rsp */
1581 "movq %rbp,0xa0(%rcx)\n\t" /* context->Rbp */
1582 "movq %rsi,0xa8(%rcx)\n\t" /* context->Rsi */
1583 "movq %rdi,0xb0(%rcx)\n\t" /* context->Rdi */
1584 "movq %r8,0xb8(%rcx)\n\t" /* context->R8 */
1585 "movq %r9,0xc0(%rcx)\n\t" /* context->R9 */
1586 "movq %r10,0xc8(%rcx)\n\t" /* context->R10 */
1587 "movq %r11,0xd0(%rcx)\n\t" /* context->R11 */
1588 "movq %r12,0xd8(%rcx)\n\t" /* context->R12 */
1589 "movq %r13,0xe0(%rcx)\n\t" /* context->R13 */
1590 "movq %r14,0xe8(%rcx)\n\t" /* context->R14 */
1591 "movq %r15,0xf0(%rcx)\n\t" /* context->R15 */
1592 "movq (%rsp),%rax\n\t"
1593 "movq %rax,0xf8(%rcx)\n\t" /* context->Rip */
1594 "fxsave 0x100(%rcx)\n\t" /* context->FtlSave */
1595 "movdqa %xmm0,0x1a0(%rcx)\n\t" /* context->Xmm0 */
1596 "movdqa %xmm1,0x1b0(%rcx)\n\t" /* context->Xmm1 */
1597 "movdqa %xmm2,0x1c0(%rcx)\n\t" /* context->Xmm2 */
1598 "movdqa %xmm3,0x1d0(%rcx)\n\t" /* context->Xmm3 */
1599 "movdqa %xmm4,0x1e0(%rcx)\n\t" /* context->Xmm4 */
1600 "movdqa %xmm5,0x1f0(%rcx)\n\t" /* context->Xmm5 */
1601 "movdqa %xmm6,0x200(%rcx)\n\t" /* context->Xmm6 */
1602 "movdqa %xmm7,0x210(%rcx)\n\t" /* context->Xmm7 */
1603 "movdqa %xmm8,0x220(%rcx)\n\t" /* context->Xmm8 */
1604 "movdqa %xmm9,0x230(%rcx)\n\t" /* context->Xmm9 */
1605 "movdqa %xmm10,0x240(%rcx)\n\t" /* context->Xmm10 */
1606 "movdqa %xmm11,0x250(%rcx)\n\t" /* context->Xmm11 */
1607 "movdqa %xmm12,0x260(%rcx)\n\t" /* context->Xmm12 */
1608 "movdqa %xmm13,0x270(%rcx)\n\t" /* context->Xmm13 */
1609 "movdqa %xmm14,0x280(%rcx)\n\t" /* context->Xmm14 */
1610 "movdqa %xmm15,0x290(%rcx)\n\t" /* context->Xmm15 */
1611 "ret" );
1612
1613 /***********************************************************************
1614 * set_cpu_context
1615 *
1616 * Set the new CPU context.
1617 */
1618 __ASM_GLOBAL_FUNC( set_cpu_context,
1619 "subq $40,%rsp\n\t"
1620 __ASM_CFI(".cfi_adjust_cfa_offset 40\n\t")
1621 "ldmxcsr 0x34(%rdi)\n\t" /* context->MxCsr */
1622 "movw 0x38(%rdi),%ax\n\t" /* context->SegCs */
1623 "movq %rax,8(%rsp)\n\t"
1624 "movw 0x42(%rdi),%ax\n\t" /* context->SegSs */
1625 "movq %rax,32(%rsp)\n\t"
1626 "movq 0x44(%rdi),%rax\n\t" /* context->Eflags */
1627 "movq %rax,16(%rsp)\n\t"
1628 "movq 0x80(%rdi),%rcx\n\t" /* context->Rcx */
1629 "movq 0x88(%rdi),%rdx\n\t" /* context->Rdx */
1630 "movq 0x90(%rdi),%rbx\n\t" /* context->Rbx */
1631 "movq 0x98(%rdi),%rax\n\t" /* context->Rsp */
1632 "movq %rax,24(%rsp)\n\t"
1633 "movq 0xa0(%rdi),%rbp\n\t" /* context->Rbp */
1634 "movq 0xa8(%rdi),%rsi\n\t" /* context->Rsi */
1635 "movq 0xb8(%rdi),%r8\n\t" /* context->R8 */
1636 "movq 0xc0(%rdi),%r9\n\t" /* context->R9 */
1637 "movq 0xc8(%rdi),%r10\n\t" /* context->R10 */
1638 "movq 0xd0(%rdi),%r11\n\t" /* context->R11 */
1639 "movq 0xd8(%rdi),%r12\n\t" /* context->R12 */
1640 "movq 0xe0(%rdi),%r13\n\t" /* context->R13 */
1641 "movq 0xe8(%rdi),%r14\n\t" /* context->R14 */
1642 "movq 0xf0(%rdi),%r15\n\t" /* context->R15 */
1643 "movq 0xf8(%rdi),%rax\n\t" /* context->Rip */
1644 "movq %rax,(%rsp)\n\t"
1645 "fxrstor 0x100(%rdi)\n\t" /* context->FtlSave */
1646 "movdqa 0x1a0(%rdi),%xmm0\n\t" /* context->Xmm0 */
1647 "movdqa 0x1b0(%rdi),%xmm1\n\t" /* context->Xmm1 */
1648 "movdqa 0x1c0(%rdi),%xmm2\n\t" /* context->Xmm2 */
1649 "movdqa 0x1d0(%rdi),%xmm3\n\t" /* context->Xmm3 */
1650 "movdqa 0x1e0(%rdi),%xmm4\n\t" /* context->Xmm4 */
1651 "movdqa 0x1f0(%rdi),%xmm5\n\t" /* context->Xmm5 */
1652 "movdqa 0x200(%rdi),%xmm6\n\t" /* context->Xmm6 */
1653 "movdqa 0x210(%rdi),%xmm7\n\t" /* context->Xmm7 */
1654 "movdqa 0x220(%rdi),%xmm8\n\t" /* context->Xmm8 */
1655 "movdqa 0x230(%rdi),%xmm9\n\t" /* context->Xmm9 */
1656 "movdqa 0x240(%rdi),%xmm10\n\t" /* context->Xmm10 */
1657 "movdqa 0x250(%rdi),%xmm11\n\t" /* context->Xmm11 */
1658 "movdqa 0x260(%rdi),%xmm12\n\t" /* context->Xmm12 */
1659 "movdqa 0x270(%rdi),%xmm13\n\t" /* context->Xmm13 */
1660 "movdqa 0x280(%rdi),%xmm14\n\t" /* context->Xmm14 */
1661 "movdqa 0x290(%rdi),%xmm15\n\t" /* context->Xmm15 */
1662 "movq 0x78(%rdi),%rax\n\t" /* context->Rax */
1663 "movq 0xb0(%rdi),%rdi\n\t" /* context->Rdi */
1664 "iretq" );
1665
1666 /***********************************************************************
1667 * copy_context
1668 *
1669 * Copy a register context according to the flags.
1670 */
1671 void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
1672 {
1673 flags &= ~CONTEXT_AMD64; /* get rid of CPU id */
1674 if (flags & CONTEXT_CONTROL)
1675 {
1676 to->Rbp = from->Rbp;
1677 to->Rip = from->Rip;
1678 to->Rsp = from->Rsp;
1679 to->SegCs = from->SegCs;
1680 to->SegSs = from->SegSs;
1681 to->EFlags = from->EFlags;
1682 }
1683 if (flags & CONTEXT_INTEGER)
1684 {
1685 to->Rax = from->Rax;
1686 to->Rcx = from->Rcx;
1687 to->Rdx = from->Rdx;
1688 to->Rbx = from->Rbx;
1689 to->Rsi = from->Rsi;
1690 to->Rdi = from->Rdi;
1691 to->R8 = from->R8;
1692 to->R9 = from->R9;
1693 to->R10 = from->R10;
1694 to->R11 = from->R11;
1695 to->R12 = from->R12;
1696 to->R13 = from->R13;
1697 to->R14 = from->R14;
1698 to->R15 = from->R15;
1699 }
1700 if (flags & CONTEXT_SEGMENTS)
1701 {
1702 to->SegDs = from->SegDs;
1703 to->SegEs = from->SegEs;
1704 to->SegFs = from->SegFs;
1705 to->SegGs = from->SegGs;
1706 }
1707 if (flags & CONTEXT_FLOATING_POINT)
1708 {
1709 to->MxCsr = from->MxCsr;
1710 to->u.FltSave = from->u.FltSave;
1711 }
1712 if (flags & CONTEXT_DEBUG_REGISTERS)
1713 {
1714 to->Dr0 = from->Dr0;
1715 to->Dr1 = from->Dr1;
1716 to->Dr2 = from->Dr2;
1717 to->Dr3 = from->Dr3;
1718 to->Dr6 = from->Dr6;
1719 to->Dr7 = from->Dr7;
1720 }
1721 }
1722
1723
1724 /***********************************************************************
1725 * context_to_server
1726 *
1727 * Convert a register context to the server format.
1728 */
1729 NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
1730 {
1731 DWORD flags = from->ContextFlags & ~CONTEXT_AMD64; /* get rid of CPU id */
1732
1733 memset( to, 0, sizeof(*to) );
1734 to->cpu = CPU_x86_64;
1735
1736 if (flags & CONTEXT_CONTROL)
1737 {
1738 to->flags |= SERVER_CTX_CONTROL;
1739 to->ctl.x86_64_regs.rbp = from->Rbp;
1740 to->ctl.x86_64_regs.rip = from->Rip;
1741 to->ctl.x86_64_regs.rsp = from->Rsp;
1742 to->ctl.x86_64_regs.cs = from->SegCs;
1743 to->ctl.x86_64_regs.ss = from->SegSs;
1744 to->ctl.x86_64_regs.flags = from->EFlags;
1745 }
1746 if (flags & CONTEXT_INTEGER)
1747 {
1748 to->flags |= SERVER_CTX_INTEGER;
1749 to->integer.x86_64_regs.rax = from->Rax;
1750 to->integer.x86_64_regs.rcx = from->Rcx;
1751 to->integer.x86_64_regs.rdx = from->Rdx;
1752 to->integer.x86_64_regs.rbx = from->Rbx;
1753 to->integer.x86_64_regs.rsi = from->Rsi;
1754 to->integer.x86_64_regs.rdi = from->Rdi;
1755 to->integer.x86_64_regs.r8 = from->R8;
1756 to->integer.x86_64_regs.r9 = from->R9;
1757 to->integer.x86_64_regs.r10 = from->R10;
1758 to->integer.x86_64_regs.r11 = from->R11;
1759 to->integer.x86_64_regs.r12 = from->R12;
1760 to->integer.x86_64_regs.r13 = from->R13;
1761 to->integer.x86_64_regs.r14 = from->R14;
1762 to->integer.x86_64_regs.r15 = from->R15;
1763 }
1764 if (flags & CONTEXT_SEGMENTS)
1765 {
1766 to->flags |= SERVER_CTX_SEGMENTS;
1767 to->seg.x86_64_regs.ds = from->SegDs;
1768 to->seg.x86_64_regs.es = from->SegEs;
1769 to->seg.x86_64_regs.fs = from->SegFs;
1770 to->seg.x86_64_regs.gs = from->SegGs;
1771 }
1772 if (flags & CONTEXT_FLOATING_POINT)
1773 {
1774 to->flags |= SERVER_CTX_FLOATING_POINT;
1775 memcpy( to->fp.x86_64_regs.fpregs, &from->u.FltSave, sizeof(to->fp.x86_64_regs.fpregs) );
1776 }
1777 if (flags & CONTEXT_DEBUG_REGISTERS)
1778 {
1779 to->flags |= SERVER_CTX_DEBUG_REGISTERS;
1780 to->debug.x86_64_regs.dr0 = from->Dr0;
1781 to->debug.x86_64_regs.dr1 = from->Dr1;
1782 to->debug.x86_64_regs.dr2 = from->Dr2;
1783 to->debug.x86_64_regs.dr3 = from->Dr3;
1784 to->debug.x86_64_regs.dr6 = from->Dr6;
1785 to->debug.x86_64_regs.dr7 = from->Dr7;
1786 }
1787 return STATUS_SUCCESS;
1788 }
1789
1790
1791 /***********************************************************************
1792 * context_from_server
1793 *
1794 * Convert a register context from the server format.
1795 */
1796 NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
1797 {
1798 if (from->cpu != CPU_x86_64) return STATUS_INVALID_PARAMETER;
1799
1800 to->ContextFlags = CONTEXT_AMD64;
1801 if (from->flags & SERVER_CTX_CONTROL)
1802 {
1803 to->ContextFlags |= CONTEXT_CONTROL;
1804 to->Rbp = from->ctl.x86_64_regs.rbp;
1805 to->Rip = from->ctl.x86_64_regs.rip;
1806 to->Rsp = from->ctl.x86_64_regs.rsp;
1807 to->SegCs = from->ctl.x86_64_regs.cs;
1808 to->SegSs = from->ctl.x86_64_regs.ss;
1809 to->EFlags = from->ctl.x86_64_regs.flags;
1810 }
1811
1812 if (from->flags & SERVER_CTX_INTEGER)
1813 {
1814 to->ContextFlags |= CONTEXT_INTEGER;
1815 to->Rax = from->integer.x86_64_regs.rax;
1816 to->Rcx = from->integer.x86_64_regs.rcx;
1817 to->Rdx = from->integer.x86_64_regs.rdx;
1818 to->Rbx = from->integer.x86_64_regs.rbx;
1819 to->Rsi = from->integer.x86_64_regs.rsi;
1820 to->Rdi = from->integer.x86_64_regs.rdi;
1821 to->R8 = from->integer.x86_64_regs.r8;
1822 to->R9 = from->integer.x86_64_regs.r9;
1823 to->R10 = from->integer.x86_64_regs.r10;
1824 to->R11 = from->integer.x86_64_regs.r11;
1825 to->R12 = from->integer.x86_64_regs.r12;
1826 to->R13 = from->integer.x86_64_regs.r13;
1827 to->R14 = from->integer.x86_64_regs.r14;
1828 to->R15 = from->integer.x86_64_regs.r15;
1829 }
1830 if (from->flags & SERVER_CTX_SEGMENTS)
1831 {
1832 to->ContextFlags |= CONTEXT_SEGMENTS;
1833 to->SegDs = from->seg.x86_64_regs.ds;
1834 to->SegEs = from->seg.x86_64_regs.es;
1835 to->SegFs = from->seg.x86_64_regs.fs;
1836 to->SegGs = from->seg.x86_64_regs.gs;
1837 }
1838 if (from->flags & SERVER_CTX_FLOATING_POINT)
1839 {
1840 to->ContextFlags |= CONTEXT_FLOATING_POINT;
1841 memcpy( &to->u.FltSave, from->fp.x86_64_regs.fpregs, sizeof(from->fp.x86_64_regs.fpregs) );
1842 to->MxCsr = to->u.FltSave.MxCsr;
1843 }
1844 if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
1845 {
1846 to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
1847 to->Dr0 = from->debug.x86_64_regs.dr0;
1848 to->Dr1 = from->debug.x86_64_regs.dr1;
1849 to->Dr2 = from->debug.x86_64_regs.dr2;
1850 to->Dr3 = from->debug.x86_64_regs.dr3;
1851 to->Dr6 = from->debug.x86_64_regs.dr6;
1852 to->Dr7 = from->debug.x86_64_regs.dr7;
1853 }
1854 return STATUS_SUCCESS;
1855 }
1856
1857
1858 extern void raise_func_trampoline( EXCEPTION_RECORD *rec, CONTEXT *context, raise_func func );
1859 __ASM_GLOBAL_FUNC( raise_func_trampoline,
1860 __ASM_CFI(".cfi_signal_frame\n\t")
1861 __ASM_CFI(".cfi_def_cfa %rbp,144\n\t") /* red zone + rip + rbp */
1862 __ASM_CFI(".cfi_rel_offset %rip,8\n\t")
1863 __ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
1864 "call *%rdx\n\t"
1865 "int $3")
1866
1867 /***********************************************************************
1868 * setup_exception
1869 *
1870 * Setup a proper stack frame for the raise function, and modify the
1871 * sigcontext so that the return from the signal handler will call
1872 * the raise function.
1873 */
1874 static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func )
1875 {
1876 struct stack_layout
1877 {
1878 CONTEXT context;
1879 EXCEPTION_RECORD rec;
1880 ULONG64 rbp;
1881 ULONG64 rip;
1882 ULONG64 red_zone[16];
1883 } *stack;
1884 ULONG64 *rsp_ptr;
1885 DWORD exception_code = 0;
1886
1887 stack = (struct stack_layout *)(RSP_sig(sigcontext) & ~15);
1888
1889 /* stack sanity checks */
1890
1891 if (is_inside_signal_stack( stack ))
1892 {
1893 ERR( "nested exception on signal stack in thread %04x eip %016lx esp %016lx stack %p-%p\n",
1894 GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext),
1895 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1896 abort_thread(1);
1897 }
1898
1899 if (stack - 1 > stack || /* check for overflow in subtraction */
1900 (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack ||
1901 (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
1902 {
1903 WARN( "exception outside of stack limits in thread %04x eip %016lx esp %016lx stack %p-%p\n",
1904 GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext),
1905 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1906 }
1907 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096)
1908 {
1909 /* stack overflow on last page, unrecoverable */
1910 UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1);
1911 ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
1912 diff, GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext),
1913 (ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1914 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1915 abort_thread(1);
1916 }
1917 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit)
1918 {
1919 /* stack access below stack limit, may be recoverable */
1920 if (virtual_handle_stack_fault( stack - 1 )) exception_code = EXCEPTION_STACK_OVERFLOW;
1921 else
1922 {
1923 UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1);
1924 ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
1925 diff, GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext),
1926 (ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1927 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1928 abort_thread(1);
1929 }
1930 }
1931
1932 stack--; /* push the stack_layout structure */
1933 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
1934 VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack));
1935 #elif defined(VALGRIND_MAKE_WRITABLE)
1936 VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack));
1937 #endif
1938 stack->rec.ExceptionRecord = NULL;
1939 stack->rec.ExceptionCode = exception_code;
1940 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1941 stack->rec.ExceptionAddress = (void *)RIP_sig(sigcontext);
1942 stack->rec.NumberParameters = 0;
1943 save_context( &stack->context, sigcontext );
1944
1945 /* store return address and %rbp without aligning, so that the offset is fixed */
1946 rsp_ptr = (ULONG64 *)RSP_sig(sigcontext) - 16;
1947 *(--rsp_ptr) = RIP_sig(sigcontext);
1948 *(--rsp_ptr) = RBP_sig(sigcontext);
1949
1950 /* now modify the sigcontext to return to the raise function */
1951 RIP_sig(sigcontext) = (ULONG_PTR)raise_func_trampoline;
1952 RDI_sig(sigcontext) = (ULONG_PTR)&stack->rec;
1953 RSI_sig(sigcontext) = (ULONG_PTR)&stack->context;
1954 RDX_sig(sigcontext) = (ULONG_PTR)func;
1955 RBP_sig(sigcontext) = (ULONG_PTR)rsp_ptr;
1956 RSP_sig(sigcontext) = (ULONG_PTR)stack;
1957 /* clear single-step, direction, and align check flag */
1958 EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
1959
1960 return &stack->rec;
1961 }
1962
1963
1964 /**********************************************************************
1965 * find_function_info
1966 */
1967 static RUNTIME_FUNCTION *find_function_info( ULONG64 pc, HMODULE module,
1968 RUNTIME_FUNCTION *func, ULONG size )
1969 {
1970 int min = 0;
1971 int max = size/sizeof(*func) - 1;
1972
1973 while (min <= max)
1974 {
1975 int pos = (min + max) / 2;
1976 if ((char *)pc < (char *)module + func[pos].BeginAddress) max = pos - 1;
1977 else if ((char *)pc >= (char *)module + func[pos].EndAddress) min = pos + 1;
1978 else
1979 {
1980 func += pos;
1981 while (func->UnwindData & 1) /* follow chained entry */
1982 func = (RUNTIME_FUNCTION *)((char *)module + (func->UnwindData & ~1));
1983 return func;
1984 }
1985 }
1986 return NULL;
1987 }
1988
1989 /**********************************************************************
1990 * lookup_function_info
1991 */
1992 static RUNTIME_FUNCTION *lookup_function_info( ULONG64 pc, ULONG64 *base, LDR_MODULE **module )
1993 {
1994 RUNTIME_FUNCTION *func = NULL;
1995 struct dynamic_unwind_entry *entry;
1996 ULONG size;
1997
1998 /* PE module or wine module */
1999 if (!LdrFindEntryForAddress( (void *)pc, module ))
2000 {
2001 *base = (ULONG64)(*module)->BaseAddress;
2002 if ((func = RtlImageDirectoryEntryToData( (*module)->BaseAddress, TRUE,
2003 IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )))
2004 {
2005 /* lookup in function table */
2006 func = find_function_info( pc, (*module)->BaseAddress, func, size );
2007 }
2008 }
2009 else
2010 {
2011 *module = NULL;
2012
2013 RtlEnterCriticalSection( &dynamic_unwind_section );
2014 LIST_FOR_EACH_ENTRY( entry, &dynamic_unwind_list, struct dynamic_unwind_entry, entry )
2015 {
2016 if (pc >= entry->base && pc < entry->base + entry->size)
2017 {
2018 *base = entry->base;
2019
2020 /* use callback or lookup in function table */
2021 if (entry->callback)
2022 func = entry->callback( pc, entry->context );
2023 else
2024 func = find_function_info( pc, (HMODULE)entry->base, entry->table, entry->table_size );
2025 break;
2026 }
2027 }
2028 RtlLeaveCriticalSection( &dynamic_unwind_section );
2029 }
2030
2031 return func;
2032 }
2033
2034 /**********************************************************************
2035 * call_handler
2036 *
2037 * Call a single exception handler.
2038 * FIXME: Handle nested exceptions.
2039 */
2040 static NTSTATUS call_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch, CONTEXT *orig_context )
2041 {
2042 DWORD res;
2043
2044 dispatch->ControlPc = dispatch->ContextRecord->Rip;
2045
2046 TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
2047 dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
2048 res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
2049 TRACE( "handler at %p returned %u\n", dispatch->LanguageHandler, res );
2050
2051 switch (res)
2052 {
2053 case ExceptionContinueExecution:
2054 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
2055 *orig_context = *dispatch->ContextRecord;
2056 return STATUS_SUCCESS;
2057 case ExceptionContinueSearch:
2058 break;
2059 case ExceptionNestedException:
2060 break;
2061 default:
2062 return STATUS_INVALID_DISPOSITION;
2063 }
2064 return STATUS_UNHANDLED_EXCEPTION;
2065 }
2066
2067
2068 /**********************************************************************
2069 * call_teb_handler
2070 *
2071 * Call a single exception handler from the TEB chain.
2072 * FIXME: Handle nested exceptions.
2073 */
2074 static NTSTATUS call_teb_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
2075 EXCEPTION_REGISTRATION_RECORD *teb_frame, CONTEXT *orig_context )
2076 {
2077 EXCEPTION_REGISTRATION_RECORD *dispatcher;
2078 DWORD res;
2079
2080 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatcher=%p)\n",
2081 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, &dispatcher );
2082 res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, &dispatcher );
2083 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
2084
2085 switch (res)
2086 {
2087 case ExceptionContinueExecution:
2088 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
2089 *orig_context = *dispatch->ContextRecord;
2090 return STATUS_SUCCESS;
2091 case ExceptionContinueSearch:
2092 break;
2093 case ExceptionNestedException:
2094 break;
2095 default:
2096 return STATUS_INVALID_DISPOSITION;
2097 }
2098 return STATUS_UNHANDLED_EXCEPTION;
2099 }
2100
2101
2102 /**********************************************************************
2103 * call_stack_handlers
2104 *
2105 * Call the stack handlers chain.
2106 */
2107 static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *orig_context )
2108 {
2109 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
2110 UNWIND_HISTORY_TABLE table;
2111 DISPATCHER_CONTEXT dispatch;
2112 CONTEXT context, new_context;
2113 LDR_MODULE *module;
2114 NTSTATUS status;
2115
2116 context = *orig_context;
2117 dispatch.TargetIp = 0;
2118 dispatch.ContextRecord = &context;
2119 dispatch.HistoryTable = &table;
2120 dispatch.ScopeIndex = 0; /* FIXME */
2121 for (;;)
2122 {
2123 new_context = context;
2124
2125 /* FIXME: should use the history table to make things faster */
2126
2127 dispatch.ImageBase = 0;
2128
2129 /* first look for PE exception information */
2130
2131 if ((dispatch.FunctionEntry = lookup_function_info( context.Rip, &dispatch.ImageBase, &module )))
2132 {
2133 dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_EHANDLER, dispatch.ImageBase,
2134 context.Rip, dispatch.FunctionEntry,
2135 &new_context, &dispatch.HandlerData,
2136 &dispatch.EstablisherFrame, NULL );
2137 goto unwind_done;
2138 }
2139
2140 /* then look for host system exception information */
2141
2142 if (!module || (module->Flags & LDR_WINE_INTERNAL))
2143 {
2144 struct dwarf_eh_bases bases;
2145 const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context.Rip - 1), &bases );
2146
2147 if (fde)
2148 {
2149 status = dwarf_virtual_unwind( context.Rip, &dispatch.EstablisherFrame, &new_context,
2150 fde, &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
2151 if (status != STATUS_SUCCESS) return status;
2152 dispatch.FunctionEntry = NULL;
2153 if (dispatch.LanguageHandler && !module)
2154 {
2155 FIXME( "calling personality routine in system library not supported yet\n" );
2156 dispatch.LanguageHandler = NULL;
2157 }
2158 goto unwind_done;
2159 }
2160 }
2161 else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
2162
2163 /* no exception information, treat as a leaf function */
2164
2165 new_context.Rip = *(ULONG64 *)context.Rsp;
2166 new_context.Rsp = context.Rsp + sizeof(ULONG64);
2167 dispatch.EstablisherFrame = new_context.Rsp;
2168 dispatch.LanguageHandler = NULL;
2169
2170 unwind_done:
2171 if (!dispatch.EstablisherFrame) break;
2172
2173 if ((dispatch.EstablisherFrame & 7) ||
2174 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
2175 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
2176 {
2177 ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
2178 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2179 rec->ExceptionFlags |= EH_STACK_INVALID;
2180 break;
2181 }
2182
2183 if (dispatch.LanguageHandler)
2184 {
2185 status = call_handler( rec, &dispatch, orig_context );
2186 if (status != STATUS_UNHANDLED_EXCEPTION) return status;
2187 }
2188 /* hack: call wine handlers registered in the tib list */
2189 else while ((ULONG64)teb_frame < new_context.Rsp)
2190 {
2191 TRACE( "found wine frame %p rsp %lx handler %p\n",
2192 teb_frame, new_context.Rsp, teb_frame->Handler );
2193 dispatch.EstablisherFrame = (ULONG64)teb_frame;
2194 context = *orig_context;
2195 status = call_teb_handler( rec, &dispatch, teb_frame, orig_context );
2196 if (status != STATUS_UNHANDLED_EXCEPTION) return status;
2197 teb_frame = teb_frame->Prev;
2198 }
2199
2200 if (new_context.Rsp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break;
2201 context = new_context;
2202 }
2203 return STATUS_UNHANDLED_EXCEPTION;
2204 }
2205
2206
2207 /*******************************************************************
2208 * raise_exception
2209 *
2210 * Implementation of NtRaiseException.
2211 */
2212 static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
2213 {
2214 NTSTATUS status;
2215
2216 if (first_chance)
2217 {
2218 DWORD c;
2219
2220 TRACE( "code=%x flags=%x addr=%p ip=%lx tid=%04x\n",
2221 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
2222 context->Rip, GetCurrentThreadId() );
2223 for (c = 0; c < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); c++)
2224 TRACE( " info[%d]=%016lx\n", c, rec->ExceptionInformation[c] );
2225 if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
2226 {
2227 if (rec->ExceptionInformation[1] >> 16)
2228 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
2229 rec->ExceptionAddress,
2230 (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
2231 else
2232 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
2233 rec->ExceptionAddress,
2234 (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
2235 }
2236 else
2237 {
2238 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
2239 context->Rax, context->Rbx, context->Rcx, context->Rdx );
2240 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
2241 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
2242 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
2243 context->R8, context->R9, context->R10, context->R11 );
2244 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
2245 context->R12, context->R13, context->R14, context->R15 );
2246 }
2247 status = send_debug_event( rec, TRUE, context );
2248 if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
2249 return STATUS_SUCCESS;
2250
2251 if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
2252 return STATUS_SUCCESS;
2253
2254 if ((status = call_stack_handlers( rec, context )) != STATUS_UNHANDLED_EXCEPTION)
2255 return status;
2256 }
2257
2258 /* last chance exception */
2259
2260 status = send_debug_event( rec, FALSE, context );
2261 if (status != DBG_CONTINUE)
2262 {
2263 if (rec->ExceptionFlags & EH_STACK_INVALID)
2264 ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
2265 else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
2266 ERR("Process attempted to continue execution after noncontinuable exception.\n");
2267 else
2268 ERR("Unhandled exception code %x flags %x addr %p\n",
2269 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
2270 NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
2271 }
2272 return STATUS_SUCCESS;
2273 }
2274
2275
2276 /**********************************************************************
2277 * raise_segv_exception
2278 */
2279 static void raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2280 {
2281 NTSTATUS status;
2282
2283 switch(rec->ExceptionCode)
2284 {
2285 case EXCEPTION_ACCESS_VIOLATION:
2286 if (rec->NumberParameters == 2)
2287 {
2288 if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
2289 rec->ExceptionInformation[0], FALSE )))
2290 set_cpu_context( context );
2291 }
2292 break;
2293 }
2294 status = raise_exception( rec, context, TRUE );
2295 if (status) raise_status( status, rec );
2296 set_cpu_context( context );
2297 }
2298
2299
2300 /**********************************************************************
2301 * raise_generic_exception
2302 *
2303 * Generic raise function for exceptions that don't need special treatment.
2304 */
2305 static void raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2306 {
2307 NTSTATUS status = raise_exception( rec, context, TRUE );
2308 if (status) raise_status( status, rec );
2309 set_cpu_context( context );
2310 }
2311
2312
2313 /**********************************************************************
2314 * segv_handler
2315 *
2316 * Handler for SIGSEGV and related errors.
2317 */
2318 static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2319 {
2320 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_segv_exception );
2321 ucontext_t *ucontext = sigcontext;
2322
2323 switch(TRAP_sig(ucontext))
2324 {
2325 case TRAP_x86_OFLOW: /* Overflow exception */
2326 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2327 break;
2328 case TRAP_x86_BOUND: /* Bound range exception */
2329 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2330 break;
2331 case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
2332 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2333 break;
2334 case TRAP_x86_STKFLT: /* Stack fault */
2335 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2336 break;
2337 case TRAP_x86_SEGNPFLT: /* Segment not present exception */
2338 case TRAP_x86_PROTFLT: /* General protection fault */
2339 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2340 rec->ExceptionCode = ERROR_sig(ucontext) ? EXCEPTION_ACCESS_VIOLATION : EXCEPTION_PRIV_INSTRUCTION;
2341 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2342 break;
2343 case TRAP_x86_PAGEFLT: /* Page fault */
2344 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2345 rec->NumberParameters = 2;
2346 rec->ExceptionInformation[0] = (ERROR_sig(ucontext) & 2) != 0;
2347 rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
2348 break;
2349 case TRAP_x86_ALIGNFLT: /* Alignment check exception */
2350 rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
2351 break;
2352 default:
2353 ERR( "Got unexpected trap %ld\n", (ULONG_PTR)TRAP_sig(ucontext) );
2354 /* fall through */
2355 case TRAP_x86_NMI: /* NMI interrupt */
2356 case TRAP_x86_DNA: /* Device not available exception */
2357 case TRAP_x86_DOUBLEFLT: /* Double fault exception */
2358 case TRAP_x86_TSSFLT: /* Invalid TSS exception */
2359 case TRAP_x86_MCHK: /* Machine check exception */
2360 case TRAP_x86_CACHEFLT: /* Cache flush exception */
2361 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2362 break;
2363 }
2364 }
2365
2366 /**********************************************************************
2367 * trap_handler
2368 *
2369 * Handler for SIGTRAP.
2370 */
2371 static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2372 {
2373 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2374
2375 switch (siginfo->si_code)
2376 {
2377 case TRAP_TRACE: /* Single-step exception */
2378 case 4 /* TRAP_HWBKPT */: /* Hardware breakpoint exception */
2379 rec->ExceptionCode = EXCEPTION_SINGLE_STEP;
2380 break;
2381 case TRAP_BRKPT: /* Breakpoint exception */
2382 rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */
2383 /* fall through */
2384 default:
2385 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
2386 break;
2387 }
2388 }
2389
2390 /**********************************************************************
2391 * fpe_handler
2392 *
2393 * Handler for SIGFPE.
2394 */
2395 static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2396 {
2397 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2398
2399 switch (siginfo->si_code)
2400 {
2401 case FPE_FLTSUB:
2402 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2403 break;
2404 case FPE_INTDIV:
2405 rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
2406 break;
2407 case FPE_INTOVF:
2408 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2409 break;
2410 case FPE_FLTDIV:
2411 rec->ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
2412 break;
2413 case FPE_FLTOVF:
2414 rec->ExceptionCode = EXCEPTION_FLT_OVERFLOW;
2415 break;
2416 case FPE_FLTUND:
2417 rec->ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
2418 break;
2419 case FPE_FLTRES:
2420 rec->ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
2421 break;
2422 case FPE_FLTINV:
2423 default:
2424 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2425 break;
2426 }
2427 }
2428
2429 /**********************************************************************
2430 * int_handler
2431 *
2432 * Handler for SIGINT.
2433 */
2434 static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2435 {
2436 if (!dispatch_signal(SIGINT))
2437 {
2438 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2439 rec->ExceptionCode = CONTROL_C_EXIT;
2440 }
2441 }
2442
2443
2444 /**********************************************************************
2445 * abrt_handler
2446 *
2447 * Handler for SIGABRT.
2448 */
2449 static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2450 {
2451 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2452 rec->ExceptionCode = EXCEPTION_WINE_ASSERTION;
2453 rec->ExceptionFlags = EH_NONCONTINUABLE;
2454 }
2455
2456
2457 /**********************************************************************
2458 * quit_handler
2459 *
2460 * Handler for SIGQUIT.
2461 */
2462 static void quit_handler( int signal, siginfo_t *siginfo, void *ucontext )
2463 {
2464 abort_thread(0);
2465 }
2466
2467
2468 /**********************************************************************
2469 * usr1_handler
2470 *
2471 * Handler for SIGUSR1, used to signal a thread that it got suspended.
2472 */
2473 static void usr1_handler( int signal, siginfo_t *siginfo, void *ucontext )
2474 {
2475 CONTEXT context;
2476
2477 save_context( &context, ucontext );
2478 wait_suspend( &context );
2479 restore_context( &context, ucontext );
2480 }
2481
2482
2483 /***********************************************************************
2484 * __wine_set_signal_handler (NTDLL.@)
2485 */
2486 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
2487 {
2488 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
2489 if (handlers[sig] != NULL) return -2;
2490 handlers[sig] = wsh;
2491 return 0;
2492 }
2493
2494
2495 /**********************************************************************
2496 * signal_alloc_thread
2497 */
2498 NTSTATUS signal_alloc_thread( TEB **teb )
2499 {
2500 static size_t sigstack_zero_bits;
2501 SIZE_T size;
2502 NTSTATUS status;
2503
2504 if (!sigstack_zero_bits)
2505 {
2506 size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
2507 /* find the first power of two not smaller than min_size */
2508 sigstack_zero_bits = 12;
2509 while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
2510 signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
2511 assert( sizeof(TEB) <= teb_size );
2512 }
2513
2514 size = 1 << sigstack_zero_bits;
2515 *teb = NULL;
2516 if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
2517 &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
2518 {
2519 (*teb)->Tib.Self = &(*teb)->Tib;
2520 (*teb)->Tib.ExceptionList = (void *)~0UL;
2521 }
2522 return status;
2523 }
2524
2525
2526 /**********************************************************************
2527 * signal_free_thread
2528 */
2529 void signal_free_thread( TEB *teb )
2530 {
2531 SIZE_T size;
2532
2533 if (teb->DeallocationStack)
2534 {
2535 size = 0;
2536 NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
2537 }
2538 size = 0;
2539 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
2540 }
2541
2542 #ifdef __APPLE__
2543 static void init_teb_key(void)
2544 {
2545 pthread_key_create( &teb_key, NULL );
2546 }
2547 #endif
2548
2549 /**********************************************************************
2550 * signal_init_thread
2551 */
2552 void signal_init_thread( TEB *teb )
2553 {
2554 const WORD fpu_cw = 0x27f;
2555 stack_t ss;
2556
2557 #ifdef __APPLE__
2558 static pthread_once_t init_once = PTHREAD_ONCE_INIT;
2559 #endif
2560
2561 #if defined __linux__
2562 arch_prctl( ARCH_SET_GS, teb );
2563 #elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
2564 amd64_set_gsbase( teb );
2565 #elif defined(__NetBSD__)
2566 sysarch( X86_64_SET_GSBASE, &teb );
2567 #elif defined (__APPLE__)
2568 /* FIXME: Actually setting %gs needs support from the OS */
2569 pthread_once( &init_once, init_teb_key );
2570 pthread_setspecific( teb_key, teb );
2571 #else
2572 # error Please define setting %gs for your architecture
2573 #endif
2574
2575 ss.ss_sp = (char *)teb + teb_size;
2576 ss.ss_size = signal_stack_size;
2577 ss.ss_flags = 0;
2578 if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
2579
2580 #ifdef __GNUC__
2581 __asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
2582 #else
2583 FIXME("FPU setup not implemented for this platform.\n");
2584 #endif
2585 }
2586
2587 /**********************************************************************
2588 * signal_init_process
2589 */
2590 void signal_init_process(void)
2591 {
2592 struct sigaction sig_act;
2593
2594 sig_act.sa_mask = server_block_set;
2595 sig_act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
2596
2597 sig_act.sa_sigaction = int_handler;
2598 if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
2599 sig_act.sa_sigaction = fpe_handler;
2600 if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
2601 sig_act.sa_sigaction = abrt_handler;
2602 if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
2603 sig_act.sa_sigaction = quit_handler;
2604 if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
2605 sig_act.sa_sigaction = usr1_handler;
2606 if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
2607
2608 sig_act.sa_sigaction = segv_handler;
2609 if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
2610 if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
2611 #ifdef SIGBUS
2612 if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
2613 #endif
2614
2615 #ifdef SIGTRAP
2616 sig_act.sa_sigaction = trap_handler;
2617 if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
2618 #endif
2619 return;
2620
2621 error:
2622 perror("sigaction");
2623 exit(1);
2624 }
2625
2626
2627 /**********************************************************************
2628 * RtlAddFunctionTable (NTDLL.@)
2629 */
2630 BOOLEAN CDECL RtlAddFunctionTable( RUNTIME_FUNCTION *table, DWORD count, DWORD64 addr )
2631 {
2632 struct dynamic_unwind_entry *entry;
2633
2634 TRACE( "%p %u %lx\n", table, count, addr );
2635
2636 /* NOTE: Windows doesn't check if table is aligned or a NULL pointer */
2637
2638 entry = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*entry) );
2639 if (!entry)
2640 return FALSE;
2641
2642 entry->base = addr;
2643 entry->size = table[count - 1].EndAddress;
2644 entry->table = table;
2645 entry->table_size = count * sizeof(RUNTIME_FUNCTION);
2646 entry->callback = NULL;
2647 entry->context = NULL;
2648
2649 RtlEnterCriticalSection( &dynamic_unwind_section );
2650 list_add_tail( &dynamic_unwind_list, &entry->entry );
2651 RtlLeaveCriticalSection( &dynamic_unwind_section );
2652
2653 return TRUE;
2654 }
2655
2656
2657 /**********************************************************************
2658 * RtlInstallFunctionTableCallback (NTDLL.@)
2659 */
2660 BOOLEAN CDECL RtlInstallFunctionTableCallback( DWORD64 table, DWORD64 base, DWORD length,
2661 PGET_RUNTIME_FUNCTION_CALLBACK callback, PVOID context, PCWSTR dll )
2662 {
2663 struct dynamic_unwind_entry *entry;
2664
2665 TRACE( "%lx %lx %d %p %p %s\n", table, base, length, callback, context, wine_dbgstr_w(dll) );
2666
2667 /* NOTE: Windows doesn't check if the provided callback is a NULL pointer */
2668
2669 /* both low-order bits must be set */
2670 if ((table & 0x3) != 0x3)
2671 return FALSE;
2672
2673 entry = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*entry) );
2674 if (!entry)
2675 return FALSE;
2676
2677 entry->base = base;
2678 entry->size = length;
2679 entry->table = (RUNTIME_FUNCTION *)table;
2680 entry->table_size = 0;
2681 entry->callback = callback;
2682 entry->context = context;
2683
2684 RtlEnterCriticalSection( &dynamic_unwind_section );
2685 list_add_tail( &dynamic_unwind_list, &entry->entry );
2686 RtlLeaveCriticalSection( &dynamic_unwind_section );
2687
2688 return TRUE;
2689 }
2690
2691
2692 /**********************************************************************
2693 * RtlDeleteFunctionTable (NTDLL.@)
2694 */
2695 BOOLEAN CDECL RtlDeleteFunctionTable( RUNTIME_FUNCTION *table )
2696 {
2697 struct dynamic_unwind_entry *entry, *to_free = NULL;
2698
2699 TRACE( "%p\n", table );
2700
2701 RtlEnterCriticalSection( &dynamic_unwind_section );
2702 LIST_FOR_EACH_ENTRY( entry, &dynamic_unwind_list, struct dynamic_unwind_entry, entry )
2703 {
2704 if (entry->table == table)
2705 {
2706 to_free = entry;
2707 list_remove( &entry->entry );
2708 break;
2709 }
2710 }
2711 RtlLeaveCriticalSection( &dynamic_unwind_section );
2712
2713 if (!to_free)
2714 return FALSE;
2715
2716 RtlFreeHeap( GetProcessHeap(), 0, to_free );
2717 return TRUE;
2718 }
2719
2720
2721 /**********************************************************************
2722 * RtlLookupFunctionEntry (NTDLL.@)
2723 */
2724 PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry( ULONG64 pc, ULONG64 *base, UNWIND_HISTORY_TABLE *table )
2725 {
2726 LDR_MODULE *module;
2727 RUNTIME_FUNCTION *func;
2728
2729 /* FIXME: should use the history table to make things faster */
2730
2731 func = lookup_function_info( pc, base, &module );
2732 if (!func)
2733 {
2734 *base = 0;
2735 if (module)
2736 WARN( "no exception table found in module %p pc %lx\n", module->BaseAddress, pc );
2737 else
2738 WARN( "module not found for %lx\n", pc );
2739 }
2740
2741 return func;
2742 }
2743
2744 static ULONG64 get_int_reg( CONTEXT *context, int reg )
2745 {
2746 return *(&context->Rax + reg);
2747 }
2748
2749 static void set_int_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, ULONG64 val )
2750 {
2751 *(&context->Rax + reg) = val;
2752 if (ctx_ptr) ctx_ptr->u2.IntegerContext[reg] = &context->Rax + reg;
2753 }
2754
2755 static void set_float_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, M128A val )
2756 {
2757 *(&context->u.s.Xmm0 + reg) = val;
2758 if (ctx_ptr) ctx_ptr->u.FloatingContext[reg] = &context->u.s.Xmm0 + reg;
2759 }
2760
2761 static int get_opcode_size( struct opcode op )
2762 {
2763 switch (op.code)
2764 {
2765 case UWOP_ALLOC_LARGE:
2766 return 2 + (op.info != 0);
2767 case UWOP_SAVE_NONVOL:
2768 case UWOP_SAVE_XMM128:
2769 return 2;
2770 case UWOP_SAVE_NONVOL_FAR:
2771 case UWOP_SAVE_XMM128_FAR:
2772 return 3;
2773 default:
2774 return 1;
2775 }
2776 }
2777
2778 static BOOL is_inside_epilog( BYTE *pc, ULONG64 base, const RUNTIME_FUNCTION *function )
2779 {
2780 /* add or lea must be the first instruction, and it must have a rex.W prefix */
2781 if ((pc[0] & 0xf8) == 0x48)
2782 {
2783 switch (pc[1])
2784 {
2785 case 0x81: /* add $nnnn,%rsp */
2786 if (pc[0] == 0x48 && pc[2] == 0xc4)
2787 {
2788 pc += 7;
2789 break;
2790 }
2791 return FALSE;
2792 case 0x83: /* add $n,%rsp */
2793 if (pc[0] == 0x48 && pc[2] == 0xc4)
2794 {
2795 pc += 4;
2796 break;
2797 }
2798 return FALSE;
2799 case 0x8d: /* lea n(reg),%rsp */
2800 if (pc[0] & 0x06) return FALSE; /* rex.RX must be cleared */
2801 if (((pc[2] >> 3) & 7) != 4) return FALSE; /* dest reg mus be %rsp */
2802 if ((pc[2] & 7) == 4) return FALSE; /* no SIB byte allowed */
2803 if ((pc[2] >> 6) == 1) /* 8-bit offset */
2804 {
2805 pc += 4;
2806 break;
2807 }
2808 if ((pc[2] >> 6) == 2) /* 32-bit offset */
2809 {
2810 pc += 7;
2811 break;
2812 }
2813 return FALSE;
2814 }
2815 }
2816
2817 /* now check for various pop instructions */
2818
2819 for (;;)
2820 {
2821 if ((*pc & 0xf0) == 0x40) pc++; /* rex prefix */
2822
2823 switch (*pc)
2824 {
2825 case 0x58: /* pop %rax/%r8 */
2826 case 0x59: /* pop %rcx/%r9 */
2827 case 0x5a: /* pop %rdx/%r10 */
2828 case 0x5b: /* pop %rbx/%r11 */
2829 case 0x5c: /* pop %rsp/%r12 */
2830 case 0x5d: /* pop %rbp/%r13 */
2831 case 0x5e: /* pop %rsi/%r14 */
2832 case 0x5f: /* pop %rdi/%r15 */
2833 pc++;
2834 continue;
2835 case 0xc2: /* ret $nn */
2836 case 0xc3: /* ret */
2837 return TRUE;
2838 case 0xe9: /* jmp nnnn */
2839 pc += 5 + *(LONG *)(pc + 1);
2840 if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress)
2841 continue;
2842 break;
2843 case 0xeb: /* jmp n */
2844 pc += 2 + (signed char)pc[1];
2845 if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress)
2846 continue;
2847 break;
2848 case 0xf3: /* rep; ret (for amd64 prediction bug) */
2849 return pc[1] == 0xc3;
2850 }
2851 return FALSE;
2852 }
2853 }
2854
2855 /* execute a function epilog, which must have been validated with is_inside_epilog() */
2856 static void interpret_epilog( BYTE *pc, CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
2857 {
2858 for (;;)
2859 {
2860 BYTE rex = 0;
2861
2862 if ((*pc & 0xf0) == 0x40) rex = *pc++ & 0x0f; /* rex prefix */
2863
2864 switch (*pc)
2865 {
2866 case 0x58: /* pop %rax/r8 */
2867 case 0x59: /* pop %rcx/r9 */
2868 case 0x5a: /* pop %rdx/r10 */
2869 case 0x5b: /* pop %rbx/r11 */
2870 case 0x5c: /* pop %rsp/r12 */
2871 case 0x5d: /* pop %rbp/r13 */
2872 case 0x5e: /* pop %rsi/r14 */
2873 case 0x5f: /* pop %rdi/r15 */
2874 set_int_reg( context, ctx_ptr, *pc - 0x58 + (rex & 1) * 8, *(ULONG64 *)context->Rsp );
2875 context->Rsp += sizeof(ULONG64);
2876 pc++;
2877 continue;
2878 case 0x81: /* add $nnnn,%rsp */
2879 context->Rsp += *(LONG *)(pc + 2);
2880 pc += 2 + sizeof(LONG);
2881 continue;
2882 case 0x83: /* add $n,%rsp */
2883 context->Rsp += (signed char)pc[2];
2884 pc += 3;
2885 continue;
2886 case 0x8d:
2887 if ((pc[1] >> 6) == 1) /* lea n(reg),%rsp */
2888 {
2889 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + (signed char)pc[2];
2890 pc += 3;
2891 }
2892 else /* lea nnnn(reg),%rsp */
2893 {
2894 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + *(LONG *)(pc + 2);
2895 pc += 2 + sizeof(LONG);
2896 }
2897 continue;
2898 case 0xc2: /* ret $nn */
2899 context->Rip = *(ULONG64 *)context->Rsp;
2900 context->Rsp += sizeof(ULONG64) + *(WORD *)(pc + 1);
2901 return;
2902 case 0xc3: /* ret */
2903 case 0xf3: /* rep; ret */
2904 context->Rip = *(ULONG64 *)context->Rsp;
2905 context->Rsp += sizeof(ULONG64);
2906 return;
2907 case 0xe9: /* jmp nnnn */
2908 pc += 5 + *(LONG *)(pc + 1);
2909 continue;
2910 case 0xeb: /* jmp n */
2911 pc += 2 + (signed char)pc[1];
2912 continue;
2913 }
2914 return;
2915 }
2916 }
2917
2918 /**********************************************************************
2919 * RtlVirtualUnwind (NTDLL.@)
2920 */
2921 PVOID WINAPI RtlVirtualUnwind( ULONG type, ULONG64 base, ULONG64 pc,
2922 RUNTIME_FUNCTION *function, CONTEXT *context,
2923 PVOID *data, ULONG64 *frame_ret,
2924 KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
2925 {
2926 union handler_data *handler_data;
2927 ULONG64 frame, off;
2928 struct UNWIND_INFO *info;
2929 unsigned int i, prolog_offset;
2930
2931 TRACE( "type %x rip %lx rsp %lx\n", type, pc, context->Rsp );
2932 if (TRACE_ON(seh)) dump_unwind_info( base, function );
2933
2934 frame = *frame_ret = context->Rsp;
2935 for (;;)
2936 {
2937 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
2938 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
2939
2940 if (info->version != 1)
2941 {
2942 FIXME( "unknown unwind info version %u at %p\n", info->version, info );
2943 return NULL;
2944 }
2945
2946 if (info->frame_reg)
2947 frame = get_int_reg( context, info->frame_reg ) - info->frame_offset * 16;
2948
2949 /* check if in prolog */
2950 if (pc >= base + function->BeginAddress && pc < base + function->BeginAddress + info->prolog)
2951 {
2952 prolog_offset = pc - base - function->BeginAddress;
2953 }
2954 else
2955 {
2956 prolog_offset = ~0;
2957 if (is_inside_epilog( (BYTE *)pc, base, function ))
2958 {
2959 interpret_epilog( (BYTE *)pc, context, ctx_ptr );
2960 *frame_ret = frame;
2961 return NULL;
2962 }
2963 }
2964
2965 for (i = 0; i < info->count; i += get_opcode_size(info->opcodes[i]))
2966 {
2967 if (prolog_offset < info->opcodes[i].offset) continue; /* skip it */
2968
2969 switch (info->opcodes[i].code)
2970 {
2971 case UWOP_PUSH_NONVOL: /* pushq %reg */
2972 set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)context->Rsp );
2973 context->Rsp += sizeof(ULONG64);
2974 break;
2975 case UWOP_ALLOC_LARGE: /* subq $nn,%rsp */
2976 if (info->opcodes[i].info) context->Rsp += *(DWORD *)&info->opcodes[i+1];
2977 else context->Rsp += *(USHORT *)&info->opcodes[i+1] * 8;
2978 break;
2979 case UWOP_ALLOC_SMALL: /* subq $n,%rsp */
2980 context->Rsp += (info->opcodes[i].info + 1) * 8;
2981 break;
2982 case UWOP_SET_FPREG: /* leaq nn(%rsp),%framereg */
2983 context->Rsp = *frame_ret = frame;
2984 break;
2985 case UWOP_SAVE_NONVOL: /* movq %reg,n(%rsp) */
2986 off = frame + *(USHORT *)&info->opcodes[i+1] * 8;
2987 set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)off );
2988 break;
2989 case UWOP_SAVE_NONVOL_FAR: /* movq %reg,nn(%rsp) */
2990 off = frame + *(DWORD *)&info->opcodes[i+1];
2991 set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)off );
2992 break;
2993 case UWOP_SAVE_XMM128: /* movaps %xmmreg,n(%rsp) */
2994 off = frame + *(USHORT *)&info->opcodes[i+1] * 16;
2995 set_float_reg( context, ctx_ptr, info->opcodes[i].info, *(M128A *)off );
2996 break;
2997 case UWOP_SAVE_XMM128_FAR: /* movaps %xmmreg,nn(%rsp) */
2998 off = frame + *(DWORD *)&info->opcodes[i+1];
2999 set_float_reg( context, ctx_ptr, info->opcodes[i].info, *(M128A *)off );
3000 break;
3001 case UWOP_PUSH_MACHFRAME:
3002 FIXME( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
3003 break;
3004 default:
3005 FIXME( "unknown code %u\n", info->opcodes[i].code );
3006 break;
3007 }
3008 }
3009
3010 if (!(info->flags & UNW_FLAG_CHAININFO)) break;
3011 function = &handler_data->chain; /* restart with the chained info */
3012 }
3013
3014 /* now pop return address */
3015 context->Rip = *(ULONG64 *)context->Rsp;
3016 context->Rsp += sizeof(ULONG64);
3017
3018 if (!(info->flags & type)) return NULL; /* no matching handler */
3019 if (prolog_offset != ~0) return NULL; /* inside prolog */
3020
3021 *data = &handler_data->handler + 1;
3022 return (char *)base + handler_data->handler;
3023 }
3024
3025
3026 /**********************************************************************
3027 * call_unwind_handler
3028 *
3029 * Call a single unwind handler.
3030 * FIXME: Handle nested exceptions.
3031 */
3032 static void call_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch )
3033 {
3034 DWORD res;
3035
3036 dispatch->ControlPc = dispatch->ContextRecord->Rip;
3037
3038 TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
3039 dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
3040 res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
3041 TRACE( "handler %p returned %x\n", dispatch->LanguageHandler, res );
3042
3043 switch (res)
3044 {
3045 case ExceptionContinueSearch:
3046 break;
3047 case ExceptionCollidedUnwind:
3048 FIXME( "ExceptionCollidedUnwind not supported yet\n" );
3049 break;
3050 default:
3051 raise_status( STATUS_INVALID_DISPOSITION, rec );
3052 break;
3053 }
3054 }
3055
3056
3057 /**********************************************************************
3058 * call_teb_unwind_handler
3059 *
3060 * Call a single unwind handler from the TEB chain.
3061 * FIXME: Handle nested exceptions.
3062 */
3063 static void call_teb_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
3064 EXCEPTION_REGISTRATION_RECORD *teb_frame )
3065 {
3066 EXCEPTION_REGISTRATION_RECORD *dispatcher;
3067 DWORD res;
3068
3069 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatcher=%p)\n",
3070 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, &dispatcher );
3071 res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, &dispatcher );
3072 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
3073
3074 switch (res)
3075 {
3076 case ExceptionContinueSearch:
3077 break;
3078 case ExceptionCollidedUnwind:
3079 FIXME( "ExceptionCollidedUnwind not supported yet\n" );
3080 break;
3081 default:
3082 raise_status( STATUS_INVALID_DISPOSITION, rec );
3083 break;
3084 }
3085 }
3086
3087
3088 /*******************************************************************
3089 * RtlUnwindEx (NTDLL.@)
3090 */
3091 void WINAPI RtlUnwindEx( PVOID end_frame, PVOID target_ip, EXCEPTION_RECORD *rec,
3092 PVOID retval, CONTEXT *context, UNWIND_HISTORY_TABLE *table )
3093 {
3094 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
3095 EXCEPTION_RECORD record;
3096 DISPATCHER_CONTEXT dispatch;
3097 CONTEXT new_context;
3098 LDR_MODULE *module;
3099 NTSTATUS status;
3100 DWORD i;
3101
3102 RtlCaptureContext( context );
3103 new_context = *context;
3104
3105 /* build an exception record, if we do not have one */
3106 if (!rec)
3107 {
3108 record.ExceptionCode = STATUS_UNWIND;
3109 record.ExceptionFlags = 0;
3110 record.ExceptionRecord = NULL;
3111 record.ExceptionAddress = (void *)context->Rip;
3112 record.NumberParameters = 0;
3113 rec = &record;
3114 }
3115
3116 rec->ExceptionFlags |= EH_UNWINDING | (end_frame ? 0 : EH_EXIT_UNWIND);
3117
3118 TRACE( "code=%x flags=%x end_frame=%p target_ip=%p rip=%016lx\n",
3119 rec->ExceptionCode, rec->ExceptionFlags, end_frame, target_ip, context->Rip );
3120 for (i = 0; i < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); i++)
3121 TRACE( " info[%d]=%016lx\n", i, rec->ExceptionInformation[i] );
3122 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
3123 context->Rax, context->Rbx, context->Rcx, context->Rdx );
3124 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
3125 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
3126 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
3127 context->R8, context->R9, context->R10, context->R11 );
3128 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
3129 context->R12, context->R13, context->R14, context->R15 );
3130
3131 dispatch.EstablisherFrame = context->Rsp;
3132 dispatch.TargetIp = (ULONG64)target_ip;
3133 dispatch.ContextRecord = context;
3134 dispatch.HistoryTable = table;
3135
3136 for (;;)
3137 {
3138 /* FIXME: should use the history table to make things faster */
3139
3140 dispatch.ImageBase = 0;
3141 dispatch.ScopeIndex = 0; /* FIXME */
3142
3143 /* first look for PE exception information */
3144
3145 if ((dispatch.FunctionEntry = lookup_function_info( context->Rip, &dispatch.ImageBase, &module )))
3146 {
3147 dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_UHANDLER, dispatch.ImageBase,
3148 context->Rip, dispatch.FunctionEntry,
3149 &new_context, &dispatch.HandlerData,
3150 &dispatch.EstablisherFrame, NULL );
3151 goto unwind_done;
3152 }
3153
3154 /* then look for host system exception information */
3155
3156 if (!module || (module->Flags & LDR_WINE_INTERNAL))
3157 {
3158 struct dwarf_eh_bases bases;
3159 const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context->Rip - 1), &bases );
3160
3161 if (fde)
3162 {
3163 dispatch.FunctionEntry = NULL;
3164 status = dwarf_virtual_unwind( context->Rip, &dispatch.EstablisherFrame, &new_context, fde,
3165 &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
3166 if (status != STATUS_SUCCESS) raise_status( status, rec );
3167 if (dispatch.LanguageHandler && !module)
3168 {
3169 FIXME( "calling personality routine in system library not supported yet\n" );
3170 dispatch.LanguageHandler = NULL;
3171 }
3172 goto unwind_done;
3173 }
3174 }
3175 else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
3176
3177 /* no exception information, treat as a leaf function */
3178
3179 new_context.Rip = *(ULONG64 *)context->Rsp;
3180 new_context.Rsp = context->Rsp + sizeof(ULONG64);
3181 dispatch.EstablisherFrame = new_context.Rsp;
3182 dispatch.LanguageHandler = NULL;
3183
3184 unwind_done:
3185 if (!dispatch.EstablisherFrame) break;
3186
3187 if (is_inside_signal_stack( (void *)dispatch.EstablisherFrame ))
3188 {
3189 TRACE( "frame %lx is inside signal stack (%p-%p)\n", dispatch.EstablisherFrame,
3190 get_signal_stack(), (char *)get_signal_stack() + signal_stack_size );
3191 *context = new_context;
3192 continue;
3193 }
3194
3195 if ((dispatch.EstablisherFrame & 7) ||
3196 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
3197 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
3198 {
3199 ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
3200 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
3201 rec->ExceptionFlags |= EH_STACK_INVALID;
3202 break;
3203 }
3204
3205 if (dispatch.LanguageHandler)
3206 {
3207 if (end_frame && (dispatch.EstablisherFrame > (ULONG64)end_frame))
3208 {
3209 ERR( "invalid end frame %lx/%p\n", dispatch.EstablisherFrame, end_frame );
3210 raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
3211 }
3212 if (dispatch.EstablisherFrame == (ULONG64)end_frame) rec->ExceptionFlags |= EH_TARGET_UNWIND;
3213 call_unwind_handler( rec, &dispatch );
3214 }
3215 else /* hack: call builtin handlers registered in the tib list */
3216 {
3217 DWORD64 backup_frame = dispatch.EstablisherFrame;
3218 while ((ULONG64)teb_frame < new_context.Rsp && (ULONG64)teb_frame < (ULONG64)end_frame)
3219 {
3220 TRACE( "found builtin frame %p handler %p\n", teb_frame, teb_frame->Handler );
3221 dispatch.EstablisherFrame = (ULONG64)teb_frame;
3222 call_teb_unwind_handler( rec, &dispatch, teb_frame );
3223 teb_frame = __wine_pop_frame( teb_frame );
3224 }
3225 if ((ULONG64)teb_frame == (ULONG64)end_frame && (ULONG64)end_frame < new_context.Rsp) break;
3226 dispatch.EstablisherFrame = backup_frame;
3227 }
3228
3229 if (dispatch.EstablisherFrame == (ULONG64)end_frame) break;
3230 *context = new_context;
3231 }
3232
3233 if (rec->ExceptionCode == STATUS_LONGJUMP && rec->NumberParameters >= 1)
3234 {
3235 struct MSVCRT_JUMP_BUFFER *jmp = (struct MSVCRT_JUMP_BUFFER *)rec->ExceptionInformation[0];
3236 context->Rbx = jmp->Rbx;
3237 context->Rsp = jmp->Rsp;
3238 context->Rbp = jmp->Rbp;
3239 context->Rsi = jmp->Rsi;
3240 context->Rdi = jmp->Rdi;
3241 context->R12 = jmp->R12;
3242 context->R13 = jmp->R13;
3243 context->R14 = jmp->R14;
3244 context->R15 = jmp->R15;
3245 context->Rip = jmp->Rip;
3246 context->u.s.Xmm6 = jmp->Xmm6;
3247 context->u.s.Xmm7 = jmp->Xmm7;
3248 context->u.s.Xmm8 = jmp->Xmm8;
3249 context->u.s.Xmm9 = jmp->Xmm9;
3250 context->u.s.Xmm10 = jmp->Xmm10;
3251 context->u.s.Xmm11 = jmp->Xmm11;
3252 context->u.s.Xmm12 = jmp->Xmm12;
3253 context->u.s.Xmm13 = jmp->Xmm13;
3254 context->u.s.Xmm14 = jmp->Xmm14;
3255 context->u.s.Xmm15 = jmp->Xmm15;
3256 }
3257 else if (rec->ExceptionCode == STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters >= 1)
3258 {
3259 PVOID (CALLBACK *consolidate)(EXCEPTION_RECORD *) = (void *)rec->ExceptionInformation[0];
3260 TRACE( "calling consolidate callback %p\n", consolidate );
3261 target_ip = consolidate( rec );
3262 }
3263 context->Rax = (ULONG64)retval;
3264 context->Rip = (ULONG64)target_ip;
3265 TRACE( "returning to %lx stack %lx\n", context->Rip, context->Rsp );
3266 set_cpu_context( context );
3267 }
3268
3269
3270 /*******************************************************************
3271 * RtlUnwind (NTDLL.@)
3272 */
3273 void WINAPI RtlUnwind( void *frame, void *target_ip, EXCEPTION_RECORD *rec, void *retval )
3274 {
3275 CONTEXT context;
3276 RtlUnwindEx( frame, target_ip, rec, retval, &context, NULL );
3277 }
3278
3279
3280 /*******************************************************************
3281 * _local_unwind (NTDLL.@)
3282 */
3283 void WINAPI _local_unwind( void *frame, void *target_ip )
3284 {
3285 CONTEXT context;
3286 RtlUnwindEx( frame, target_ip, NULL, NULL, &context, NULL );
3287 }
3288
3289
3290 /*******************************************************************
3291 * __C_specific_handler (NTDLL.@)
3292 */
3293 EXCEPTION_DISPOSITION WINAPI __C_specific_handler( EXCEPTION_RECORD *rec,
3294 ULONG64 frame,
3295 CONTEXT *context,
3296 struct _DISPATCHER_CONTEXT *dispatch )
3297 {
3298 SCOPE_TABLE *table = dispatch->HandlerData;
3299 ULONG i;
3300
3301 TRACE( "%p %lx %p %p\n", rec, frame, context, dispatch );
3302 if (TRACE_ON(seh)) dump_scope_table( dispatch->ImageBase, table );
3303
3304 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) /* FIXME */
3305 return ExceptionContinueSearch;
3306
3307 for (i = 0; i < table->Count; i++)
3308 {
3309 if (context->Rip >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
3310 context->Rip < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
3311 {
3312 if (!table->ScopeRecord[i].JumpTarget) continue;
3313 if (table->ScopeRecord[i].HandlerAddress != EXCEPTION_EXECUTE_HANDLER)
3314 {
3315 EXCEPTION_POINTERS ptrs;
3316 PC_LANGUAGE_EXCEPTION_HANDLER filter;
3317
3318 filter = (PC_LANGUAGE_EXCEPTION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
3319 ptrs.ExceptionRecord = rec;
3320 ptrs.ContextRecord = context;
3321 TRACE( "calling filter %p ptrs %p frame %lx\n", filter, &ptrs, frame );
3322 switch (filter( &ptrs, frame ))
3323 {
3324 case EXCEPTION_EXECUTE_HANDLER:
3325 break;
3326 case EXCEPTION_CONTINUE_SEARCH:
3327 continue;
3328 case EXCEPTION_CONTINUE_EXECUTION:
3329 return ExceptionContinueExecution;
3330 }
3331 }
3332 TRACE( "unwinding to target %lx\n", dispatch->ImageBase + table->ScopeRecord[i].JumpTarget );
3333 RtlUnwindEx( (void *)frame, (char *)dispatch->ImageBase + table->ScopeRecord[i].JumpTarget,
3334 rec, 0, context, dispatch->HistoryTable );
3335 }
3336 }
3337 return ExceptionContinueSearch;
3338 }
3339
3340
3341 /*******************************************************************
3342 * NtRaiseException (NTDLL.@)
3343 */
3344 NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
3345 {
3346 NTSTATUS status = raise_exception( rec, context, first_chance );
3347 if (status == STATUS_SUCCESS) NtSetContextThread( GetCurrentThread(), context );
3348 return status;
3349 }
3350
3351
3352 /***********************************************************************
3353 * RtlRaiseException (NTDLL.@)
3354 */
3355 void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
3356 {
3357 NTSTATUS status;
3358
3359 rec->ExceptionAddress = (void *)context->Rip;
3360 status = raise_exception( rec, context, TRUE );
3361 if (status != STATUS_SUCCESS) raise_status( status, rec );
3362 }
3363 __ASM_GLOBAL_FUNC( RtlRaiseException,
3364 "movq %rcx,8(%rsp)\n\t"
3365 "sub $0x4f8,%rsp\n\t"
3366 __ASM_CFI(".cfi_adjust_cfa_offset 0x4f8\n\t")
3367 "leaq 0x20(%rsp),%rcx\n\t"
3368 "call " __ASM_NAME("RtlCaptureContext") "\n\t"
3369 "leaq 0x20(%rsp),%rdx\n\t" /* context pointer */
3370 "movq 0x4f8(%rsp),%rax\n\t" /* return address */
3371 "movq %rax,0xf8(%rdx)\n\t" /* context->Rip */
3372 "leaq 0x500(%rsp),%rax\n\t" /* orig stack pointer */
3373 "movq %rax,0x98(%rdx)\n\t" /* context->Rsp */
3374 "movq (%rax),%rcx\n\t" /* original first parameter */
3375 "movq %rcx,0x80(%rdx)\n\t" /* context->Rcx */
3376 "call " __ASM_NAME("__regs_RtlRaiseException") "\n\t"
3377 "leaq 0x20(%rsp),%rdi\n\t" /* context pointer */
3378 "call " __ASM_NAME("set_cpu_context") /* does not return */ );
3379
3380
3381 /*************************************************************************
3382 * RtlCaptureStackBackTrace (NTDLL.@)
3383 */
3384 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
3385 {
3386 FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash );
3387 return 0;
3388 }
3389
3390
3391 /***********************************************************************
3392 * call_thread_func
3393 */
3394 void call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg, void *frame )
3395 {
3396 ntdll_get_thread_data()->exit_frame = frame;
3397 __TRY
3398 {
3399 RtlExitUserThread( entry( arg ));
3400 }
3401 __EXCEPT(unhandled_exception_filter)
3402 {
3403 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
3404 }
3405 __ENDTRY
3406 abort(); /* should not be reached */
3407 }
3408
3409 extern void DECLSPEC_NORETURN call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg );
3410 __ASM_GLOBAL_FUNC( call_thread_entry_point,
3411 "subq $56,%rsp\n\t"
3412 __ASM_CFI(".cfi_adjust_cfa_offset 56\n\t")
3413 "movq %rbp,48(%rsp)\n\t"
3414 __ASM_CFI(".cfi_rel_offset %rbp,48\n\t")
3415 "movq %rbx,40(%rsp)\n\t"
3416 __ASM_CFI(".cfi_rel_offset %rbx,40\n\t")
3417 "movq %r12,32(%rsp)\n\t"
3418 __ASM_CFI(".cfi_rel_offset %r12,32\n\t")
3419 "movq %r13,24(%rsp)\n\t"
3420 __ASM_CFI(".cfi_rel_offset %r13,24\n\t")
3421 "movq %r14,16(%rsp)\n\t"
3422 __ASM_CFI(".cfi_rel_offset %r14,16\n\t")
3423 "movq %r15,8(%rsp)\n\t"
3424 __ASM_CFI(".cfi_rel_offset %r15,8\n\t")
3425 "movq %rsp,%rdx\n\t"
3426 "call " __ASM_NAME("call_thread_func") );
3427
3428 extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), void *frame );
3429 __ASM_GLOBAL_FUNC( call_thread_exit_func,
3430 "movq %rdx,%rsp\n\t"
3431 __ASM_CFI(".cfi_adjust_cfa_offset 56\n\t")
3432 __ASM_CFI(".cfi_rel_offset %rbp,48\n\t")
3433 __ASM_CFI(".cfi_rel_offset %rbx,40\n\t")
3434 __ASM_CFI(".cfi_rel_offset %r12,32\n\t")
3435 __ASM_CFI(".cfi_rel_offset %r13,24\n\t")
3436 __ASM_CFI(".cfi_rel_offset %r14,16\n\t")
3437 __ASM_CFI(".cfi_rel_offset %r15,8\n\t")
3438 "call *%rsi" );
3439
3440 /***********************************************************************
3441 * RtlExitUserThread (NTDLL.@)
3442 */
3443 void WINAPI RtlExitUserThread( ULONG status )
3444 {
3445 if (!ntdll_get_thread_data()->exit_frame) exit_thread( status );
3446 call_thread_exit_func( status, exit_thread, ntdll_get_thread_data()->exit_frame );
3447 }
3448
3449 /***********************************************************************
3450 * abort_thread
3451 */
3452 void abort_thread( int status )
3453 {
3454 if (!ntdll_get_thread_data()->exit_frame) terminate_thread( status );
3455 call_thread_exit_func( status, terminate_thread, ntdll_get_thread_data()->exit_frame );
3456 }
3457
3458 /**********************************************************************
3459 * __wine_enter_vm86 (NTDLL.@)
3460 */
3461 void __wine_enter_vm86( CONTEXT *context )
3462 {
3463 MESSAGE("vm86 mode not supported on this platform\n");
3464 }
3465
3466 /**********************************************************************
3467 * DbgBreakPoint (NTDLL.@)
3468 */
3469 __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret")
3470
3471 /**********************************************************************
3472 * DbgUserBreakPoint (NTDLL.@)
3473 */
3474 __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret")
3475
3476 /**********************************************************************
3477 * NtCurrentTeb (NTDLL.@)
3478 *
3479 * FIXME: This isn't exported from NTDLL on real NT. This should be
3480 * removed if and when we can set the GSBASE MSR on Mac OS X.
3481 */
3482 #ifdef __APPLE__
3483 TEB * WINAPI NtCurrentTeb(void)
3484 {
3485 return pthread_getspecific( teb_key );
3486 }
3487 #else
3488 __ASM_STDCALL_FUNC( NtCurrentTeb, 0, ".byte 0x65\n\tmovq 0x30,%rax\n\tret" )
3489 #endif
3490
3491 #endif /* __x86_64__ */
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