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push 149f0a5527ac85057a8ef03858d34d91c36f97e8
[wine/hacks.git] / dlls / ntdll / signal_x86_64.c
blob97a952ed2f5689d24539418e7a4aebfb3327fed5
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 #ifdef HAVE_UNISTD_H
32 # include <unistd.h>
33 #endif
34
35 #ifdef HAVE_SYS_PARAM_H
36 # include <sys/param.h>
37 #endif
38 #ifdef HAVE_SYS_SIGNAL_H
39 # include <sys/signal.h>
40 #endif
41
42 #define NONAMELESSUNION
43 #define NONAMELESSSTRUCT
44 #include "ntstatus.h"
45 #define WIN32_NO_STATUS
46 #include "windef.h"
47 #include "winternl.h"
48 #include "wine/library.h"
49 #include "wine/exception.h"
50 #include "ntdll_misc.h"
51 #include "wine/debug.h"
52
53 WINE_DEFAULT_DEBUG_CHANNEL(seh);
54
55 struct _DISPATCHER_CONTEXT;
56
57 typedef LONG (WINAPI *PC_LANGUAGE_EXCEPTION_HANDLER)( EXCEPTION_POINTERS *ptrs, ULONG64 frame );
58 typedef EXCEPTION_DISPOSITION (WINAPI *PEXCEPTION_ROUTINE)( EXCEPTION_RECORD *rec,
59 ULONG64 frame,
60 CONTEXT *context,
61 struct _DISPATCHER_CONTEXT *dispatch );
62
63 typedef struct _DISPATCHER_CONTEXT
64 {
65 ULONG64 ControlPc;
66 ULONG64 ImageBase;
67 PRUNTIME_FUNCTION FunctionEntry;
68 ULONG64 EstablisherFrame;
69 ULONG64 TargetIp;
70 PCONTEXT ContextRecord;
71 PEXCEPTION_ROUTINE LanguageHandler;
72 PVOID HandlerData;
73 PUNWIND_HISTORY_TABLE HistoryTable;
74 ULONG ScopeIndex;
75 } DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT;
76
77 typedef struct _SCOPE_TABLE
78 {
79 ULONG Count;
80 struct
81 {
82 ULONG BeginAddress;
83 ULONG EndAddress;
84 ULONG HandlerAddress;
85 ULONG JumpTarget;
86 } ScopeRecord[1];
87 } SCOPE_TABLE, *PSCOPE_TABLE;
88
89
90 /***********************************************************************
91 * signal context platform-specific definitions
92 */
93 #ifdef linux
94
95 #include <asm/prctl.h>
96 extern int arch_prctl(int func, void *ptr);
97
98 #define RAX_sig(context) ((context)->uc_mcontext.gregs[REG_RAX])
99 #define RBX_sig(context) ((context)->uc_mcontext.gregs[REG_RBX])
100 #define RCX_sig(context) ((context)->uc_mcontext.gregs[REG_RCX])
101 #define RDX_sig(context) ((context)->uc_mcontext.gregs[REG_RDX])
102 #define RSI_sig(context) ((context)->uc_mcontext.gregs[REG_RSI])
103 #define RDI_sig(context) ((context)->uc_mcontext.gregs[REG_RDI])
104 #define RBP_sig(context) ((context)->uc_mcontext.gregs[REG_RBP])
105 #define R8_sig(context) ((context)->uc_mcontext.gregs[REG_R8])
106 #define R9_sig(context) ((context)->uc_mcontext.gregs[REG_R9])
107 #define R10_sig(context) ((context)->uc_mcontext.gregs[REG_R10])
108 #define R11_sig(context) ((context)->uc_mcontext.gregs[REG_R11])
109 #define R12_sig(context) ((context)->uc_mcontext.gregs[REG_R12])
110 #define R13_sig(context) ((context)->uc_mcontext.gregs[REG_R13])
111 #define R14_sig(context) ((context)->uc_mcontext.gregs[REG_R14])
112 #define R15_sig(context) ((context)->uc_mcontext.gregs[REG_R15])
113
114 #define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0))
115 #define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1))
116 #define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2))
117
118 #define RSP_sig(context) ((context)->uc_mcontext.gregs[REG_RSP])
119 #define RIP_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
120 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
121 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
122 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
123
124 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.fpregs))
125
126 #endif /* linux */
127
128 #if defined(__NetBSD__)
129 # include <sys/ucontext.h>
130 # include <sys/types.h>
131 # include <signal.h>
132
133 #define RAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RAX])
134 #define RBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBX])
135 #define RCX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RCX])
136 #define RDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDX])
137 #define RSI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RSI])
138 #define RDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDI])
139 #define RBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBP])
140 #define R8_sig(context) ((context)->uc_mcontext.__gregs[_REG_R8])
141 #define R9_sig(context) ((context)->uc_mcontext.__gregs[_REG_R9])
142 #define R10_sig(context) ((context)->uc_mcontext.__gregs[_REG_R10])
143 #define R11_sig(context) ((context)->uc_mcontext.__gregs[_REG_R11])
144 #define R12_sig(context) ((context)->uc_mcontext.__gregs[_REG_R12])
145 #define R13_sig(context) ((context)->uc_mcontext.__gregs[_REG_R13])
146 #define R14_sig(context) ((context)->uc_mcontext.__gregs[_REG_R14])
147 #define R15_sig(context) ((context)->uc_mcontext.__gregs[_REG_R15])
148
149 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
150 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
151 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
152 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
153 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
154 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
155
156 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_RFL])
157
158 #define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_RIP]))
159 #define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_URSP]))
160
161 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
162 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
163
164 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.__fpregs))
165 #endif /* __NetBSD__ */
166
167 enum i386_trap_code
168 {
169 TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
170 TRAP_x86_DIVIDE = 0, /* Division by zero exception */
171 TRAP_x86_TRCTRAP = 1, /* Single-step exception */
172 TRAP_x86_NMI = 2, /* NMI interrupt */
173 TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
174 TRAP_x86_OFLOW = 4, /* Overflow exception */
175 TRAP_x86_BOUND = 5, /* Bound range exception */
176 TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
177 TRAP_x86_DNA = 7, /* Device not available exception */
178 TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
179 TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
180 TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
181 TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
182 TRAP_x86_STKFLT = 12, /* Stack fault */
183 TRAP_x86_PROTFLT = 13, /* General protection fault */
184 TRAP_x86_PAGEFLT = 14, /* Page fault */
185 TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
186 TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
187 TRAP_x86_MCHK = 18, /* Machine check exception */
188 TRAP_x86_CACHEFLT = 19 /* Cache flush exception */
189 };
190
191 static const size_t teb_size = 0x2000; /* we reserve two pages for the TEB */
192 static size_t signal_stack_size;
193
194 typedef void (*raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
195 typedef int (*wine_signal_handler)(unsigned int sig);
196
197 static wine_signal_handler handlers[256];
198
199
200 /***********************************************************************
201 * Definitions for Win32 unwind tables
202 */
203
204 union handler_data
205 {
206 RUNTIME_FUNCTION chain;
207 ULONG handler;
208 };
209
210 struct opcode
211 {
212 BYTE offset;
213 BYTE code : 4;
214 BYTE info : 4;
215 };
216
217 struct UNWIND_INFO
218 {
219 BYTE version : 3;
220 BYTE flags : 5;
221 BYTE prolog;
222 BYTE count;
223 BYTE frame_reg : 4;
224 BYTE frame_offset : 4;
225 struct opcode opcodes[1]; /* info->count entries */
226 /* followed by handler_data */
227 };
228
229 #define UWOP_PUSH_NONVOL 0
230 #define UWOP_ALLOC_LARGE 1
231 #define UWOP_ALLOC_SMALL 2
232 #define UWOP_SET_FPREG 3
233 #define UWOP_SAVE_NONVOL 4
234 #define UWOP_SAVE_NONVOL_FAR 5
235 #define UWOP_SAVE_XMM128 8
236 #define UWOP_SAVE_XMM128_FAR 9
237 #define UWOP_PUSH_MACHFRAME 10
238
239 static void dump_unwind_info( ULONG64 base, RUNTIME_FUNCTION *function )
240 {
241 static const char * const reg_names[16] =
242 { "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
243 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" };
244
245 union handler_data *handler_data;
246 struct UNWIND_INFO *info;
247 unsigned int i, count;
248
249 TRACE( "**** func %x-%x\n", function->BeginAddress, function->EndAddress );
250 for (;;)
251 {
252 if (function->UnwindData & 1)
253 {
254 RUNTIME_FUNCTION *next = (RUNTIME_FUNCTION *)((char *)base + (function->UnwindData & ~1));
255 TRACE( "unwind info for function %p-%p chained to function %p-%p\n",
256 (char *)base + function->BeginAddress, (char *)base + function->EndAddress,
257 (char *)base + next->BeginAddress, (char *)base + next->EndAddress );
258 function = next;
259 continue;
260 }
261 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
262
263 TRACE( "unwind info at %p flags %x prolog 0x%x bytes function %p-%p\n",
264 info, info->flags, info->prolog,
265 (char *)base + function->BeginAddress, (char *)base + function->EndAddress );
266
267 if (info->frame_reg)
268 TRACE( " frame register %s offset 0x%x(%%rsp)\n",
269 reg_names[info->frame_reg], info->frame_offset * 16 );
270
271 for (i = 0; i < info->count; i++)
272 {
273 TRACE( " 0x%x: ", info->opcodes[i].offset );
274 switch (info->opcodes[i].code)
275 {
276 case UWOP_PUSH_NONVOL:
277 TRACE( "pushq %%%s\n", reg_names[info->opcodes[i].info] );
278 break;
279 case UWOP_ALLOC_LARGE:
280 if (info->opcodes[i].info)
281 {
282 count = *(DWORD *)&info->opcodes[i+1];
283 i += 2;
284 }
285 else
286 {
287 count = *(USHORT *)&info->opcodes[i+1] * 8;
288 i++;
289 }
290 TRACE( "subq $0x%x,%%rsp\n", count );
291 break;
292 case UWOP_ALLOC_SMALL:
293 count = (info->opcodes[i].info + 1) * 8;
294 TRACE( "subq $0x%x,%%rsp\n", count );
295 break;
296 case UWOP_SET_FPREG:
297 TRACE( "leaq 0x%x(%%rsp),%s\n",
298 info->frame_offset * 16, reg_names[info->frame_reg] );
299 break;
300 case UWOP_SAVE_NONVOL:
301 count = *(USHORT *)&info->opcodes[i+1] * 8;
302 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
303 i++;
304 break;
305 case UWOP_SAVE_NONVOL_FAR:
306 count = *(DWORD *)&info->opcodes[i+1];
307 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
308 i += 2;
309 break;
310 case UWOP_SAVE_XMM128:
311 count = *(USHORT *)&info->opcodes[i+1] * 16;
312 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
313 i++;
314 break;
315 case UWOP_SAVE_XMM128_FAR:
316 count = *(DWORD *)&info->opcodes[i+1];
317 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
318 i += 2;
319 break;
320 case UWOP_PUSH_MACHFRAME:
321 TRACE( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
322 break;
323 default:
324 FIXME( "unknown code %u\n", info->opcodes[i].code );
325 break;
326 }
327 }
328
329 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
330 if (info->flags & UNW_FLAG_CHAININFO)
331 {
332 TRACE( " chained to function %p-%p\n",
333 (char *)base + handler_data->chain.BeginAddress,
334 (char *)base + handler_data->chain.EndAddress );
335 function = &handler_data->chain;
336 continue;
337 }
338 if (info->flags & (UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER))
339 TRACE( " handler %p data at %p\n",
340 (char *)base + handler_data->handler, &handler_data->handler + 1 );
341 break;
342 }
343 }
344
345 static void dump_scope_table( ULONG64 base, const SCOPE_TABLE *table )
346 {
347 unsigned int i;
348
349 TRACE( "scope table at %p\n", table );
350 for (i = 0; i < table->Count; i++)
351 TRACE( " %u: %lx-%lx handler %lx target %lx\n", i,
352 base + table->ScopeRecord[i].BeginAddress,
353 base + table->ScopeRecord[i].EndAddress,
354 base + table->ScopeRecord[i].HandlerAddress,
355 base + table->ScopeRecord[i].JumpTarget );
356 }
357
358
359 /***********************************************************************
360 * Definitions for Dwarf unwind tables
361 */
362
363 enum dwarf_call_frame_info
364 {
365 DW_CFA_advance_loc = 0x40,
366 DW_CFA_offset = 0x80,
367 DW_CFA_restore = 0xc0,
368 DW_CFA_nop = 0x00,
369 DW_CFA_set_loc = 0x01,
370 DW_CFA_advance_loc1 = 0x02,
371 DW_CFA_advance_loc2 = 0x03,
372 DW_CFA_advance_loc4 = 0x04,
373 DW_CFA_offset_extended = 0x05,
374 DW_CFA_restore_extended = 0x06,
375 DW_CFA_undefined = 0x07,
376 DW_CFA_same_value = 0x08,
377 DW_CFA_register = 0x09,
378 DW_CFA_remember_state = 0x0a,
379 DW_CFA_restore_state = 0x0b,
380 DW_CFA_def_cfa = 0x0c,
381 DW_CFA_def_cfa_register = 0x0d,
382 DW_CFA_def_cfa_offset = 0x0e,
383 DW_CFA_def_cfa_expression = 0x0f,
384 DW_CFA_expression = 0x10,
385 DW_CFA_offset_extended_sf = 0x11,
386 DW_CFA_def_cfa_sf = 0x12,
387 DW_CFA_def_cfa_offset_sf = 0x13,
388 DW_CFA_val_offset = 0x14,
389 DW_CFA_val_offset_sf = 0x15,
390 DW_CFA_val_expression = 0x16,
391 };
392
393 enum dwarf_operation
394 {
395 DW_OP_addr = 0x03,
396 DW_OP_deref = 0x06,
397 DW_OP_const1u = 0x08,
398 DW_OP_const1s = 0x09,
399 DW_OP_const2u = 0x0a,
400 DW_OP_const2s = 0x0b,
401 DW_OP_const4u = 0x0c,
402 DW_OP_const4s = 0x0d,
403 DW_OP_const8u = 0x0e,
404 DW_OP_const8s = 0x0f,
405 DW_OP_constu = 0x10,
406 DW_OP_consts = 0x11,
407 DW_OP_dup = 0x12,
408 DW_OP_drop = 0x13,
409 DW_OP_over = 0x14,
410 DW_OP_pick = 0x15,
411 DW_OP_swap = 0x16,
412 DW_OP_rot = 0x17,
413 DW_OP_xderef = 0x18,
414 DW_OP_abs = 0x19,
415 DW_OP_and = 0x1a,
416 DW_OP_div = 0x1b,
417 DW_OP_minus = 0x1c,
418 DW_OP_mod = 0x1d,
419 DW_OP_mul = 0x1e,
420 DW_OP_neg = 0x1f,
421 DW_OP_not = 0x20,
422 DW_OP_or = 0x21,
423 DW_OP_plus = 0x22,
424 DW_OP_plus_uconst = 0x23,
425 DW_OP_shl = 0x24,
426 DW_OP_shr = 0x25,
427 DW_OP_shra = 0x26,
428 DW_OP_xor = 0x27,
429 DW_OP_bra = 0x28,
430 DW_OP_eq = 0x29,
431 DW_OP_ge = 0x2a,
432 DW_OP_gt = 0x2b,
433 DW_OP_le = 0x2c,
434 DW_OP_lt = 0x2d,
435 DW_OP_ne = 0x2e,
436 DW_OP_skip = 0x2f,
437 DW_OP_lit0 = 0x30,
438 DW_OP_lit1 = 0x31,
439 DW_OP_lit2 = 0x32,
440 DW_OP_lit3 = 0x33,
441 DW_OP_lit4 = 0x34,
442 DW_OP_lit5 = 0x35,
443 DW_OP_lit6 = 0x36,
444 DW_OP_lit7 = 0x37,
445 DW_OP_lit8 = 0x38,
446 DW_OP_lit9 = 0x39,
447 DW_OP_lit10 = 0x3a,
448 DW_OP_lit11 = 0x3b,
449 DW_OP_lit12 = 0x3c,
450 DW_OP_lit13 = 0x3d,
451 DW_OP_lit14 = 0x3e,
452 DW_OP_lit15 = 0x3f,
453 DW_OP_lit16 = 0x40,
454 DW_OP_lit17 = 0x41,
455 DW_OP_lit18 = 0x42,
456 DW_OP_lit19 = 0x43,
457 DW_OP_lit20 = 0x44,
458 DW_OP_lit21 = 0x45,
459 DW_OP_lit22 = 0x46,
460 DW_OP_lit23 = 0x47,
461 DW_OP_lit24 = 0x48,
462 DW_OP_lit25 = 0x49,
463 DW_OP_lit26 = 0x4a,
464 DW_OP_lit27 = 0x4b,
465 DW_OP_lit28 = 0x4c,
466 DW_OP_lit29 = 0x4d,
467 DW_OP_lit30 = 0x4e,
468 DW_OP_lit31 = 0x4f,
469 DW_OP_reg0 = 0x50,
470 DW_OP_reg1 = 0x51,
471 DW_OP_reg2 = 0x52,
472 DW_OP_reg3 = 0x53,
473 DW_OP_reg4 = 0x54,
474 DW_OP_reg5 = 0x55,
475 DW_OP_reg6 = 0x56,
476 DW_OP_reg7 = 0x57,
477 DW_OP_reg8 = 0x58,
478 DW_OP_reg9 = 0x59,
479 DW_OP_reg10 = 0x5a,
480 DW_OP_reg11 = 0x5b,
481 DW_OP_reg12 = 0x5c,
482 DW_OP_reg13 = 0x5d,
483 DW_OP_reg14 = 0x5e,
484 DW_OP_reg15 = 0x5f,
485 DW_OP_reg16 = 0x60,
486 DW_OP_reg17 = 0x61,
487 DW_OP_reg18 = 0x62,
488 DW_OP_reg19 = 0x63,
489 DW_OP_reg20 = 0x64,
490 DW_OP_reg21 = 0x65,
491 DW_OP_reg22 = 0x66,
492 DW_OP_reg23 = 0x67,
493 DW_OP_reg24 = 0x68,
494 DW_OP_reg25 = 0x69,
495 DW_OP_reg26 = 0x6a,
496 DW_OP_reg27 = 0x6b,
497 DW_OP_reg28 = 0x6c,
498 DW_OP_reg29 = 0x6d,
499 DW_OP_reg30 = 0x6e,
500 DW_OP_reg31 = 0x6f,
501 DW_OP_breg0 = 0x70,
502 DW_OP_breg1 = 0x71,
503 DW_OP_breg2 = 0x72,
504 DW_OP_breg3 = 0x73,
505 DW_OP_breg4 = 0x74,
506 DW_OP_breg5 = 0x75,
507 DW_OP_breg6 = 0x76,
508 DW_OP_breg7 = 0x77,
509 DW_OP_breg8 = 0x78,
510 DW_OP_breg9 = 0x79,
511 DW_OP_breg10 = 0x7a,
512 DW_OP_breg11 = 0x7b,
513 DW_OP_breg12 = 0x7c,
514 DW_OP_breg13 = 0x7d,
515 DW_OP_breg14 = 0x7e,
516 DW_OP_breg15 = 0x7f,
517 DW_OP_breg16 = 0x80,
518 DW_OP_breg17 = 0x81,
519 DW_OP_breg18 = 0x82,
520 DW_OP_breg19 = 0x83,
521 DW_OP_breg20 = 0x84,
522 DW_OP_breg21 = 0x85,
523 DW_OP_breg22 = 0x86,
524 DW_OP_breg23 = 0x87,
525 DW_OP_breg24 = 0x88,
526 DW_OP_breg25 = 0x89,
527 DW_OP_breg26 = 0x8a,
528 DW_OP_breg27 = 0x8b,
529 DW_OP_breg28 = 0x8c,
530 DW_OP_breg29 = 0x8d,
531 DW_OP_breg30 = 0x8e,
532 DW_OP_breg31 = 0x8f,
533 DW_OP_regx = 0x90,
534 DW_OP_fbreg = 0x91,
535 DW_OP_bregx = 0x92,
536 DW_OP_piece = 0x93,
537 DW_OP_deref_size = 0x94,
538 DW_OP_xderef_size = 0x95,
539 DW_OP_nop = 0x96,
540 DW_OP_push_object_address = 0x97,
541 DW_OP_call2 = 0x98,
542 DW_OP_call4 = 0x99,
543 DW_OP_call_ref = 0x9a,
544 DW_OP_form_tls_address = 0x9b,
545 DW_OP_call_frame_cfa = 0x9c,
546 DW_OP_bit_piece = 0x9d,
547 DW_OP_lo_user = 0xe0,
548 DW_OP_hi_user = 0xff,
549 DW_OP_GNU_push_tls_address = 0xe0,
550 DW_OP_GNU_uninit = 0xf0,
551 DW_OP_GNU_encoded_addr = 0xf1,
552 };
553
554 #define DW_EH_PE_native 0x00
555 #define DW_EH_PE_leb128 0x01
556 #define DW_EH_PE_data2 0x02
557 #define DW_EH_PE_data4 0x03
558 #define DW_EH_PE_data8 0x04
559 #define DW_EH_PE_signed 0x08
560 #define DW_EH_PE_abs 0x00
561 #define DW_EH_PE_pcrel 0x10
562 #define DW_EH_PE_textrel 0x20
563 #define DW_EH_PE_datarel 0x30
564 #define DW_EH_PE_funcrel 0x40
565 #define DW_EH_PE_aligned 0x50
566 #define DW_EH_PE_indirect 0x80
567 #define DW_EH_PE_omit 0xff
568
569 struct dwarf_eh_bases
570 {
571 void *tbase;
572 void *dbase;
573 void *func;
574 };
575
576 struct dwarf_cie
577 {
578 unsigned int length;
579 int id;
580 unsigned char version;
581 unsigned char augmentation[1];
582 };
583
584 struct dwarf_fde
585 {
586 unsigned int length;
587 unsigned int cie_offset;
588 };
589
590 extern const struct dwarf_fde *_Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
591
592 static unsigned char dwarf_get_u1( const unsigned char **p )
593 {
594 return *(*p)++;
595 }
596
597 static unsigned short dwarf_get_u2( const unsigned char **p )
598 {
599 unsigned int ret = (*p)[0] | ((*p)[1] << 8);
600 (*p) += 2;
601 return ret;
602 }
603
604 static unsigned int dwarf_get_u4( const unsigned char **p )
605 {
606 unsigned int ret = (*p)[0] | ((*p)[1] << 8) | ((*p)[2] << 16) | ((*p)[3] << 24);
607 (*p) += 4;
608 return ret;
609 }
610
611 static ULONG64 dwarf_get_u8( const unsigned char **p )
612 {
613 ULONG64 low = dwarf_get_u4( p );
614 ULONG64 high = dwarf_get_u4( p );
615 return low | (high << 32);
616 }
617
618 static ULONG_PTR dwarf_get_uleb128( const unsigned char **p )
619 {
620 ULONG_PTR ret = 0;
621 unsigned int shift = 0;
622 unsigned char byte;
623
624 do
625 {
626 byte = **p;
627 ret |= (ULONG_PTR)(byte & 0x7f) << shift;
628 shift += 7;
629 (*p)++;
630 } while (byte & 0x80);
631 return ret;
632 }
633
634 static LONG_PTR dwarf_get_sleb128( const unsigned char **p )
635 {
636 ULONG_PTR ret = 0;
637 unsigned int shift = 0;
638 unsigned char byte;
639
640 do
641 {
642 byte = **p;
643 ret |= (ULONG_PTR)(byte & 0x7f) << shift;
644 shift += 7;
645 (*p)++;
646 } while (byte & 0x80);
647
648 if ((shift < 8 * sizeof(ret)) && (byte & 0x40)) ret |= -((ULONG_PTR)1 << shift);
649 return ret;
650 }
651
652 static ULONG_PTR dwarf_get_ptr( const unsigned char **p, unsigned char encoding )
653 {
654 ULONG_PTR base;
655
656 if (encoding == DW_EH_PE_omit) return 0;
657
658 switch (encoding & 0xf0)
659 {
660 case DW_EH_PE_abs:
661 base = 0;
662 break;
663 case DW_EH_PE_pcrel:
664 base = (ULONG_PTR)*p;
665 break;
666 default:
667 FIXME( "unsupported encoding %02x\n", encoding );
668 return 0;
669 }
670
671 switch (encoding & 0x0f)
672 {
673 case DW_EH_PE_native:
674 return base + dwarf_get_u8( p );
675 case DW_EH_PE_leb128:
676 return base + dwarf_get_uleb128( p );
677 case DW_EH_PE_data2:
678 return base + dwarf_get_u2( p );
679 case DW_EH_PE_data4:
680 return base + dwarf_get_u4( p );
681 case DW_EH_PE_data8:
682 return base + dwarf_get_u8( p );
683 case DW_EH_PE_signed|DW_EH_PE_leb128:
684 return base + dwarf_get_sleb128( p );
685 case DW_EH_PE_signed|DW_EH_PE_data2:
686 return base + (signed short)dwarf_get_u2( p );
687 case DW_EH_PE_signed|DW_EH_PE_data4:
688 return base + (signed int)dwarf_get_u4( p );
689 case DW_EH_PE_signed|DW_EH_PE_data8:
690 return base + (LONG64)dwarf_get_u8( p );
691 default:
692 FIXME( "unsupported encoding %02x\n", encoding );
693 return 0;
694 }
695 }
696
697 enum reg_rule
698 {
699 RULE_UNSET, /* not set at all */
700 RULE_UNDEFINED, /* undefined value */
701 RULE_SAME, /* same value as previous frame */
702 RULE_CFA_OFFSET, /* stored at cfa offset */
703 RULE_OTHER_REG, /* stored in other register */
704 RULE_EXPRESSION, /* address specified by expression */
705 RULE_VAL_EXPRESSION /* value specified by expression */
706 };
707
708 #define NB_FRAME_REGS 41
709
710 struct frame_info
711 {
712 ULONG_PTR ip;
713 ULONG_PTR code_align;
714 LONG_PTR data_align;
715 ULONG_PTR cfa_offset;
716 enum reg_rule cfa_rule;
717 unsigned char cfa_reg;
718 unsigned char retaddr_reg;
719 unsigned char fde_encoding;
720 unsigned char signal_frame;
721 enum reg_rule rules[NB_FRAME_REGS];
722 ULONG64 regs[NB_FRAME_REGS];
723 };
724
725 static const char *dwarf_reg_names[NB_FRAME_REGS] =
726 {
727 /* 0-7 */ "%rax", "%rdx", "%rcx", "%rbx", "%rsi", "%rdi", "%rbp", "%rsp",
728 /* 8-16 */ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%rip",
729 /* 17-24 */ "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7",
730 /* 25-32 */ "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15",
731 /* 33-40 */ "%st0", "%st1", "%st2", "%st3", "%st4", "%st5", "%st6", "%st7"
732 };
733
734 static int valid_reg( ULONG_PTR reg )
735 {
736 if (reg >= NB_FRAME_REGS) FIXME( "unsupported reg %lx\n", reg );
737 return (reg < NB_FRAME_REGS);
738 }
739
740 static void execute_cfa_instructions( const unsigned char *ptr, const unsigned char *end,
741 ULONG_PTR last_ip, struct frame_info *info )
742 {
743 while (ptr < end && info->ip < last_ip + info->signal_frame)
744 {
745 enum dwarf_call_frame_info op = *ptr++;
746
747 if (op & 0xc0)
748 {
749 switch (op & 0xc0)
750 {
751 case DW_CFA_advance_loc:
752 {
753 ULONG_PTR offset = (op & 0x3f) * info->code_align;
754 TRACE( "%lx: DW_CFA_advance_loc %lu\n", info->ip, offset );
755 info->ip += offset;
756 break;
757 }
758 case DW_CFA_offset:
759 {
760 ULONG_PTR reg = op & 0x3f;
761 LONG_PTR offset = dwarf_get_uleb128( &ptr ) * info->data_align;
762 if (!valid_reg( reg )) break;
763 TRACE( "%lx: DW_CFA_offset %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
764 info->regs[reg] = offset;
765 info->rules[reg] = RULE_CFA_OFFSET;
766 break;
767 }
768 case DW_CFA_restore:
769 {
770 ULONG_PTR reg = op & 0x3f;
771 if (!valid_reg( reg )) break;
772 TRACE( "%lx: DW_CFA_restore %s\n", info->ip, dwarf_reg_names[reg] );
773 info->rules[reg] = RULE_UNSET;
774 break;
775 }
776 }
777 }
778 else switch (op)
779 {
780 case DW_CFA_nop:
781 break;
782 case DW_CFA_set_loc:
783 {
784 ULONG_PTR loc = dwarf_get_ptr( &ptr, info->fde_encoding );
785 TRACE( "%lx: DW_CFA_set_loc %lx\n", info->ip, loc );
786 info->ip = loc;
787 break;
788 }
789 case DW_CFA_advance_loc1:
790 {
791 ULONG_PTR offset = *ptr++ * info->code_align;
792 TRACE( "%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset );
793 info->ip += offset;
794 break;
795 }
796 case DW_CFA_advance_loc2:
797 {
798 ULONG_PTR offset = dwarf_get_u2( &ptr ) * info->code_align;
799 TRACE( "%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset );
800 info->ip += offset;
801 break;
802 }
803 case DW_CFA_advance_loc4:
804 {
805 ULONG_PTR offset = dwarf_get_u4( &ptr ) * info->code_align;
806 TRACE( "%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset );
807 info->ip += offset;
808 break;
809 }
810 case DW_CFA_offset_extended:
811 case DW_CFA_offset_extended_sf:
812 {
813 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
814 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf_get_uleb128( &ptr ) * info->data_align
815 : dwarf_get_sleb128( &ptr ) * info->data_align;
816 if (!valid_reg( reg )) break;
817 TRACE( "%lx: DW_CFA_offset_extended %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
818 info->regs[reg] = offset;
819 info->rules[reg] = RULE_CFA_OFFSET;
820 break;
821 }
822 case DW_CFA_restore_extended:
823 {
824 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
825 if (!valid_reg( reg )) break;
826 TRACE( "%lx: DW_CFA_restore_extended %s\n", info->ip, dwarf_reg_names[reg] );
827 info->rules[reg] = RULE_UNSET;
828 break;
829 }
830 case DW_CFA_undefined:
831 {
832 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
833 if (!valid_reg( reg )) break;
834 TRACE( "%lx: DW_CFA_undefined %s\n", info->ip, dwarf_reg_names[reg] );
835 info->rules[reg] = RULE_UNDEFINED;
836 break;
837 }
838 case DW_CFA_same_value:
839 {
840 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
841 if (!valid_reg( reg )) break;
842 TRACE( "%lx: DW_CFA_same_value %s\n", info->ip, dwarf_reg_names[reg] );
843 info->regs[reg] = reg;
844 info->rules[reg] = RULE_SAME;
845 break;
846 }
847 case DW_CFA_register:
848 {
849 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
850 ULONG_PTR reg2 = dwarf_get_uleb128( &ptr );
851 if (!valid_reg( reg ) || !valid_reg( reg2 )) break;
852 TRACE( "%lx: DW_CFA_register %s == %s\n", info->ip, dwarf_reg_names[reg], dwarf_reg_names[reg2] );
853 info->regs[reg] = reg2;
854 info->rules[reg] = RULE_OTHER_REG;
855 break;
856 }
857 case DW_CFA_remember_state:
858 FIXME( "%lx: DW_CFA_remember_state not implemented\n", info->ip );
859 break;
860 case DW_CFA_restore_state:
861 FIXME( "%lx: DW_CFA_restore_state not implemented\n", info->ip );
862 break;
863 case DW_CFA_def_cfa:
864 case DW_CFA_def_cfa_sf:
865 {
866 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
867 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf_get_uleb128( &ptr )
868 : dwarf_get_sleb128( &ptr ) * info->data_align;
869 if (!valid_reg( reg )) break;
870 TRACE( "%lx: DW_CFA_def_cfa %s, %lu\n", info->ip, dwarf_reg_names[reg], offset );
871 info->cfa_reg = reg;
872 info->cfa_offset = offset;
873 info->cfa_rule = RULE_CFA_OFFSET;
874 break;
875 }
876 case DW_CFA_def_cfa_register:
877 {
878 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
879 if (!valid_reg( reg )) break;
880 TRACE( "%lx: DW_CFA_def_cfa_register %s\n", info->ip, dwarf_reg_names[reg] );
881 info->cfa_reg = reg;
882 info->cfa_rule = RULE_CFA_OFFSET;
883 break;
884 }
885 case DW_CFA_def_cfa_offset:
886 case DW_CFA_def_cfa_offset_sf:
887 {
888 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf_get_uleb128( &ptr )
889 : dwarf_get_sleb128( &ptr ) * info->data_align;
890 TRACE( "%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset );
891 info->cfa_offset = offset;
892 info->cfa_rule = RULE_CFA_OFFSET;
893 break;
894 }
895 case DW_CFA_def_cfa_expression:
896 {
897 ULONG_PTR expr = (ULONG_PTR)ptr;
898 ULONG_PTR len = dwarf_get_uleb128( &ptr );
899 TRACE( "%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len );
900 info->cfa_offset = expr;
901 info->cfa_rule = RULE_VAL_EXPRESSION;
902 ptr += len;
903 break;
904 }
905 case DW_CFA_expression:
906 case DW_CFA_val_expression:
907 {
908 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
909 ULONG_PTR expr = (ULONG_PTR)ptr;
910 ULONG_PTR len = dwarf_get_uleb128( &ptr );
911 if (!valid_reg( reg )) break;
912 TRACE( "%lx: DW_CFA_%sexpression %s %lx-%lx\n",
913 info->ip, (op == DW_CFA_expression) ? "" : "val_", dwarf_reg_names[reg], expr, expr+len );
914 info->regs[reg] = expr;
915 info->rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
916 ptr += len;
917 break;
918 }
919 default:
920 FIXME( "%lx: unknown CFA opcode %02x\n", info->ip, op );
921 break;
922 }
923 }
924 }
925
926 /* retrieve a context register from its dwarf number */
927 static void *get_context_reg( CONTEXT *context, ULONG_PTR dw_reg )
928 {
929 switch (dw_reg)
930 {
931 case 0: return &context->Rax;
932 case 1: return &context->Rdx;
933 case 2: return &context->Rcx;
934 case 3: return &context->Rbx;
935 case 4: return &context->Rsi;
936 case 5: return &context->Rdi;
937 case 6: return &context->Rbp;
938 case 7: return &context->Rsp;
939 case 8: return &context->R8;
940 case 9: return &context->R9;
941 case 10: return &context->R10;
942 case 11: return &context->R11;
943 case 12: return &context->R12;
944 case 13: return &context->R13;
945 case 14: return &context->R14;
946 case 15: return &context->R15;
947 case 16: return &context->Rip;
948 case 17: return &context->u.s.Xmm0;
949 case 18: return &context->u.s.Xmm1;
950 case 19: return &context->u.s.Xmm2;
951 case 20: return &context->u.s.Xmm3;
952 case 21: return &context->u.s.Xmm4;
953 case 22: return &context->u.s.Xmm5;
954 case 23: return &context->u.s.Xmm6;
955 case 24: return &context->u.s.Xmm7;
956 case 25: return &context->u.s.Xmm8;
957 case 26: return &context->u.s.Xmm9;
958 case 27: return &context->u.s.Xmm10;
959 case 28: return &context->u.s.Xmm11;
960 case 29: return &context->u.s.Xmm12;
961 case 30: return &context->u.s.Xmm13;
962 case 31: return &context->u.s.Xmm14;
963 case 32: return &context->u.s.Xmm15;
964 case 33: return &context->u.s.Legacy[0];
965 case 34: return &context->u.s.Legacy[1];
966 case 35: return &context->u.s.Legacy[2];
967 case 36: return &context->u.s.Legacy[3];
968 case 37: return &context->u.s.Legacy[4];
969 case 38: return &context->u.s.Legacy[5];
970 case 39: return &context->u.s.Legacy[6];
971 case 40: return &context->u.s.Legacy[7];
972 default: return NULL;
973 }
974 }
975
976 /* set a context register from its dwarf number */
977 static void set_context_reg( CONTEXT *context, ULONG_PTR dw_reg, void *val )
978 {
979 switch (dw_reg)
980 {
981 case 0: context->Rax = *(ULONG64 *)val; break;
982 case 1: context->Rdx = *(ULONG64 *)val; break;
983 case 2: context->Rcx = *(ULONG64 *)val; break;
984 case 3: context->Rbx = *(ULONG64 *)val; break;
985 case 4: context->Rsi = *(ULONG64 *)val; break;
986 case 5: context->Rdi = *(ULONG64 *)val; break;
987 case 6: context->Rbp = *(ULONG64 *)val; break;
988 case 7: context->Rsp = *(ULONG64 *)val; break;
989 case 8: context->R8 = *(ULONG64 *)val; break;
990 case 9: context->R9 = *(ULONG64 *)val; break;
991 case 10: context->R10 = *(ULONG64 *)val; break;
992 case 11: context->R11 = *(ULONG64 *)val; break;
993 case 12: context->R12 = *(ULONG64 *)val; break;
994 case 13: context->R13 = *(ULONG64 *)val; break;
995 case 14: context->R14 = *(ULONG64 *)val; break;
996 case 15: context->R15 = *(ULONG64 *)val; break;
997 case 16: context->Rip = *(ULONG64 *)val; break;
998 case 17: context->u.s.Xmm0 = *(M128A *)val; break;
999 case 18: context->u.s.Xmm1 = *(M128A *)val; break;
1000 case 19: context->u.s.Xmm2 = *(M128A *)val; break;
1001 case 20: context->u.s.Xmm3 = *(M128A *)val; break;
1002 case 21: context->u.s.Xmm4 = *(M128A *)val; break;
1003 case 22: context->u.s.Xmm5 = *(M128A *)val; break;
1004 case 23: context->u.s.Xmm6 = *(M128A *)val; break;
1005 case 24: context->u.s.Xmm7 = *(M128A *)val; break;
1006 case 25: context->u.s.Xmm8 = *(M128A *)val; break;
1007 case 26: context->u.s.Xmm9 = *(M128A *)val; break;
1008 case 27: context->u.s.Xmm10 = *(M128A *)val; break;
1009 case 28: context->u.s.Xmm11 = *(M128A *)val; break;
1010 case 29: context->u.s.Xmm12 = *(M128A *)val; break;
1011 case 30: context->u.s.Xmm13 = *(M128A *)val; break;
1012 case 31: context->u.s.Xmm14 = *(M128A *)val; break;
1013 case 32: context->u.s.Xmm15 = *(M128A *)val; break;
1014 case 33: context->u.s.Legacy[0] = *(M128A *)val; break;
1015 case 34: context->u.s.Legacy[1] = *(M128A *)val; break;
1016 case 35: context->u.s.Legacy[2] = *(M128A *)val; break;
1017 case 36: context->u.s.Legacy[3] = *(M128A *)val; break;
1018 case 37: context->u.s.Legacy[4] = *(M128A *)val; break;
1019 case 38: context->u.s.Legacy[5] = *(M128A *)val; break;
1020 case 39: context->u.s.Legacy[6] = *(M128A *)val; break;
1021 case 40: context->u.s.Legacy[7] = *(M128A *)val; break;
1022 }
1023 }
1024
1025 static ULONG_PTR eval_expression( const unsigned char *p, CONTEXT *context )
1026 {
1027 ULONG_PTR reg, tmp, stack[64];
1028 int sp = -1;
1029 ULONG_PTR len = dwarf_get_uleb128(&p);
1030 const unsigned char *end = p + len;
1031
1032 while (p < end)
1033 {
1034 unsigned char opcode = dwarf_get_u1(&p);
1035
1036 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
1037 stack[++sp] = opcode - DW_OP_lit0;
1038 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
1039 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_reg0 );
1040 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
1041 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_breg0 ) + dwarf_get_sleb128(&p);
1042 else switch (opcode)
1043 {
1044 case DW_OP_nop: break;
1045 case DW_OP_addr: stack[++sp] = dwarf_get_u8(&p); break;
1046 case DW_OP_const1u: stack[++sp] = dwarf_get_u1(&p); break;
1047 case DW_OP_const1s: stack[++sp] = (signed char)dwarf_get_u1(&p); break;
1048 case DW_OP_const2u: stack[++sp] = dwarf_get_u2(&p); break;
1049 case DW_OP_const2s: stack[++sp] = (short)dwarf_get_u2(&p); break;
1050 case DW_OP_const4u: stack[++sp] = dwarf_get_u4(&p); break;
1051 case DW_OP_const4s: stack[++sp] = (signed int)dwarf_get_u4(&p); break;
1052 case DW_OP_const8u: stack[++sp] = dwarf_get_u8(&p); break;
1053 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf_get_u8(&p); break;
1054 case DW_OP_constu: stack[++sp] = dwarf_get_uleb128(&p); break;
1055 case DW_OP_consts: stack[++sp] = dwarf_get_sleb128(&p); break;
1056 case DW_OP_deref: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
1057 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
1058 case DW_OP_drop: sp--; break;
1059 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
1060 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf_get_u1(&p)]; sp++; break;
1061 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
1062 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
1063 case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
1064 case DW_OP_neg: stack[sp] = -stack[sp]; break;
1065 case DW_OP_not: stack[sp] = ~stack[sp]; break;
1066 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
1067 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
1068 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
1069 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
1070 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
1071 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
1072 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
1073 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
1074 case DW_OP_plus_uconst: stack[sp] += dwarf_get_uleb128(&p); break;
1075 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
1076 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
1077 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
1078 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
1079 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
1080 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
1081 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
1082 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
1083 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
1084 case DW_OP_skip: tmp = (short)dwarf_get_u2(&p); p += tmp; break;
1085 case DW_OP_bra: tmp = (short)dwarf_get_u2(&p); if (!stack[sp--]) p += tmp; break;
1086 case DW_OP_GNU_encoded_addr: tmp = *p++; stack[++sp] = dwarf_get_ptr( &p, tmp ); break;
1087 case DW_OP_regx: stack[++sp] = *(ULONG_PTR *)get_context_reg( context, dwarf_get_uleb128(&p) ); break;
1088 case DW_OP_bregx:
1089 reg = dwarf_get_uleb128(&p);
1090 tmp = dwarf_get_sleb128(&p);
1091 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, reg ) + tmp;
1092 break;
1093 case DW_OP_deref_size:
1094 switch (*p++)
1095 {
1096 case 1: stack[sp] = *(unsigned char *)stack[sp]; break;
1097 case 2: stack[sp] = *(unsigned short *)stack[sp]; break;
1098 case 4: stack[sp] = *(unsigned int *)stack[sp]; break;
1099 case 8: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
1100 }
1101 break;
1102 default:
1103 FIXME( "unhandled opcode %02x\n", opcode );
1104 }
1105 }
1106 return stack[sp];
1107 }
1108
1109 /* apply the computed frame info to the actual context */
1110 static void apply_frame_info( CONTEXT *context, struct frame_info *info )
1111 {
1112 unsigned int i;
1113 ULONG_PTR cfa, value;
1114 CONTEXT new_context = *context;
1115
1116 switch (info->cfa_rule)
1117 {
1118 case RULE_EXPRESSION:
1119 cfa = *(ULONG_PTR *)eval_expression( (const unsigned char *)info->cfa_offset, context );
1120 break;
1121 case RULE_VAL_EXPRESSION:
1122 cfa = eval_expression( (const unsigned char *)info->cfa_offset, context );
1123 break;
1124 default:
1125 cfa = *(ULONG_PTR *)get_context_reg( context, info->cfa_reg ) + info->cfa_offset;
1126 break;
1127 }
1128 if (!cfa) return;
1129
1130 for (i = 0; i < NB_FRAME_REGS; i++)
1131 {
1132 switch (info->rules[i])
1133 {
1134 case RULE_UNSET:
1135 case RULE_UNDEFINED:
1136 case RULE_SAME:
1137 break;
1138 case RULE_CFA_OFFSET:
1139 set_context_reg( &new_context, i, (char *)cfa + info->regs[i] );
1140 break;
1141 case RULE_OTHER_REG:
1142 set_context_reg( &new_context, i, get_context_reg( context, info->regs[i] ));
1143 break;
1144 case RULE_EXPRESSION:
1145 value = eval_expression( (const unsigned char *)info->regs[i], context );
1146 set_context_reg( &new_context, i, (void *)value );
1147 break;
1148 case RULE_VAL_EXPRESSION:
1149 value = eval_expression( (const unsigned char *)info->regs[i], context );
1150 set_context_reg( &new_context, i, &value );
1151 break;
1152 }
1153 }
1154 new_context.Rsp = cfa;
1155 *context = new_context;
1156 }
1157
1158
1159 /***********************************************************************
1160 * dwarf_virtual_unwind
1161 *
1162 * Equivalent of RtlVirtualUnwind for builtin modules.
1163 */
1164 static NTSTATUS dwarf_virtual_unwind( ULONG64 ip, ULONG64 *frame,CONTEXT *context,
1165 const struct dwarf_fde *fde, const struct dwarf_eh_bases *bases,
1166 PEXCEPTION_ROUTINE *handler, void **handler_data )
1167 {
1168 const struct dwarf_cie *cie;
1169 const unsigned char *ptr, *augmentation, *end;
1170 ULONG_PTR len, code_end;
1171 struct frame_info info;
1172 int aug_z_format = 0;
1173 unsigned char lsda_encoding = DW_EH_PE_omit;
1174
1175 memset( &info, 0, sizeof(info) );
1176 info.ip = (ULONG_PTR)bases->func;
1177 *handler = NULL;
1178
1179 cie = (const struct dwarf_cie *)((const char *)&fde->cie_offset - fde->cie_offset);
1180
1181 /* parse the CIE first */
1182
1183 if (cie->version != 1)
1184 {
1185 FIXME( "unknown CIE version %u at %p\n", cie->version, cie );
1186 return STATUS_INVALID_DISPOSITION;
1187 }
1188 ptr = cie->augmentation + strlen((const char *)cie->augmentation) + 1;
1189
1190 info.code_align = dwarf_get_uleb128( &ptr );
1191 info.data_align = dwarf_get_sleb128( &ptr );
1192 info.retaddr_reg = *ptr++;
1193 info.cfa_rule = RULE_CFA_OFFSET;
1194
1195 TRACE( "function %lx base %p cie %p len %x id %x version %x aug '%s' code_align %lu data_align %ld retaddr %s\n",
1196 ip, bases->func, cie, cie->length, cie->id, cie->version, cie->augmentation,
1197 info.code_align, info.data_align, dwarf_reg_names[info.retaddr_reg] );
1198
1199 end = NULL;
1200 for (augmentation = cie->augmentation; *augmentation; augmentation++)
1201 {
1202 switch (*augmentation)
1203 {
1204 case 'z':
1205 len = dwarf_get_uleb128( &ptr );
1206 end = ptr + len;
1207 aug_z_format = 1;
1208 continue;
1209 case 'L':
1210 lsda_encoding = *ptr++;
1211 continue;
1212 case 'P':
1213 {
1214 unsigned char encoding = *ptr++;
1215 *handler = (void *)dwarf_get_ptr( &ptr, encoding );
1216 continue;
1217 }
1218 case 'R':
1219 info.fde_encoding = *ptr++;
1220 continue;
1221 case 'S':
1222 info.signal_frame = 1;
1223 continue;
1224 }
1225 FIXME( "unknown augmentation '%c'\n", *augmentation );
1226 if (!end) return STATUS_INVALID_DISPOSITION; /* cannot continue */
1227 break;
1228 }
1229 if (end) ptr = end;
1230
1231 end = (const unsigned char *)(&cie->length + 1) + cie->length;
1232 execute_cfa_instructions( ptr, end, ip, &info );
1233
1234 ptr = (const unsigned char *)(fde + 1);
1235 info.ip = dwarf_get_ptr( &ptr, info.fde_encoding ); /* fde code start */
1236 code_end = info.ip + dwarf_get_ptr( &ptr, info.fde_encoding & 0x0f ); /* fde code length */
1237
1238 if (aug_z_format) /* get length of augmentation data */
1239 {
1240 len = dwarf_get_uleb128( &ptr );
1241 end = ptr + len;
1242 }
1243 else end = NULL;
1244
1245 *handler_data = (void *)dwarf_get_ptr( &ptr, lsda_encoding );
1246 if (end) ptr = end;
1247
1248 end = (const unsigned char *)(&fde->length + 1) + fde->length;
1249 TRACE( "fde %p len %x personality %p lsda %p code %lx-%lx\n",
1250 fde, fde->length, *handler, *handler_data, info.ip, code_end );
1251 execute_cfa_instructions( ptr, end, ip, &info );
1252 apply_frame_info( context, &info );
1253 *frame = context->Rsp;
1254
1255 TRACE( "next function rip=%016lx\n", context->Rip );
1256 TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
1257 context->Rax, context->Rbx, context->Rcx, context->Rdx );
1258 TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
1259 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
1260 TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
1261 context->R8, context->R9, context->R10, context->R11 );
1262 TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
1263 context->R12, context->R13, context->R14, context->R15 );
1264
1265 return STATUS_SUCCESS;
1266 }
1267
1268
1269 /***********************************************************************
1270 * dispatch_signal
1271 */
1272 static inline int dispatch_signal(unsigned int sig)
1273 {
1274 if (handlers[sig] == NULL) return 0;
1275 return handlers[sig](sig);
1276 }
1277
1278 /***********************************************************************
1279 * get_signal_stack
1280 *
1281 * Get the base of the signal stack for the current thread.
1282 */
1283 static inline void *get_signal_stack(void)
1284 {
1285 return (char *)NtCurrentTeb() + teb_size;
1286 }
1287
1288 /***********************************************************************
1289 * is_inside_signal_stack
1290 *
1291 * Check if pointer is inside the signal stack.
1292 */
1293 static inline int is_inside_signal_stack( void *ptr )
1294 {
1295 return ((char *)ptr >= (char *)get_signal_stack() &&
1296 (char *)ptr < (char *)get_signal_stack() + signal_stack_size);
1297 }
1298
1299 /***********************************************************************
1300 * save_context
1301 *
1302 * Set the register values from a sigcontext.
1303 */
1304 static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
1305 {
1306 context->ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS;
1307 context->Rax = RAX_sig(sigcontext);
1308 context->Rcx = RCX_sig(sigcontext);
1309 context->Rdx = RDX_sig(sigcontext);
1310 context->Rbx = RBX_sig(sigcontext);
1311 context->Rsp = RSP_sig(sigcontext);
1312 context->Rbp = RBP_sig(sigcontext);
1313 context->Rsi = RSI_sig(sigcontext);
1314 context->Rdi = RDI_sig(sigcontext);
1315 context->R8 = R8_sig(sigcontext);
1316 context->R9 = R9_sig(sigcontext);
1317 context->R10 = R10_sig(sigcontext);
1318 context->R11 = R11_sig(sigcontext);
1319 context->R12 = R12_sig(sigcontext);
1320 context->R13 = R13_sig(sigcontext);
1321 context->R14 = R14_sig(sigcontext);
1322 context->R15 = R15_sig(sigcontext);
1323 context->Rip = RIP_sig(sigcontext);
1324 context->SegCs = CS_sig(sigcontext);
1325 context->SegFs = FS_sig(sigcontext);
1326 context->SegGs = GS_sig(sigcontext);
1327 context->EFlags = EFL_sig(sigcontext);
1328 #ifdef DS_sig
1329 context->SegDs = DS_sig(sigcontext);
1330 #else
1331 __asm__("movw %%ds,%0" : "=m" (context->SegDs));
1332 #endif
1333 #ifdef ES_sig
1334 context->SegEs = ES_sig(sigcontext);
1335 #else
1336 __asm__("movw %%es,%0" : "=m" (context->SegEs));
1337 #endif
1338 #ifdef SS_sig
1339 context->SegSs = SS_sig(sigcontext);
1340 #else
1341 __asm__("movw %%ss,%0" : "=m" (context->SegSs));
1342 #endif
1343 if (FPU_sig(sigcontext))
1344 {
1345 context->ContextFlags |= CONTEXT_FLOATING_POINT;
1346 context->u.FltSave = *FPU_sig(sigcontext);
1347 context->MxCsr = context->u.FltSave.MxCsr;
1348 }
1349 }
1350
1351
1352 /***********************************************************************
1353 * restore_context
1354 *
1355 * Build a sigcontext from the register values.
1356 */
1357 static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
1358 {
1359 RAX_sig(sigcontext) = context->Rax;
1360 RCX_sig(sigcontext) = context->Rcx;
1361 RDX_sig(sigcontext) = context->Rdx;
1362 RBX_sig(sigcontext) = context->Rbx;
1363 RSP_sig(sigcontext) = context->Rsp;
1364 RBP_sig(sigcontext) = context->Rbp;
1365 RSI_sig(sigcontext) = context->Rsi;
1366 RDI_sig(sigcontext) = context->Rdi;
1367 R8_sig(sigcontext) = context->R8;
1368 R9_sig(sigcontext) = context->R9;
1369 R10_sig(sigcontext) = context->R10;
1370 R11_sig(sigcontext) = context->R11;
1371 R12_sig(sigcontext) = context->R12;
1372 R13_sig(sigcontext) = context->R13;
1373 R14_sig(sigcontext) = context->R14;
1374 R15_sig(sigcontext) = context->R15;
1375 RIP_sig(sigcontext) = context->Rip;
1376 CS_sig(sigcontext) = context->SegCs;
1377 FS_sig(sigcontext) = context->SegFs;
1378 GS_sig(sigcontext) = context->SegGs;
1379 EFL_sig(sigcontext) = context->EFlags;
1380 #ifdef DS_sig
1381 DS_sig(sigcontext) = context->SegDs;
1382 #endif
1383 #ifdef ES_sig
1384 ES_sig(sigcontext) = context->SegEs;
1385 #endif
1386 #ifdef SS_sig
1387 SS_sig(sigcontext) = context->SegSs;
1388 #endif
1389 if (FPU_sig(sigcontext)) *FPU_sig(sigcontext) = context->u.FltSave;
1390 }
1391
1392
1393 /***********************************************************************
1394 * RtlCaptureContext (NTDLL.@)
1395 */
1396 void WINAPI __regs_RtlCaptureContext( CONTEXT *context, CONTEXT *regs )
1397 {
1398 *context = *regs;
1399 }
1400 DEFINE_REGS_ENTRYPOINT( RtlCaptureContext, 1 )
1401
1402
1403 /***********************************************************************
1404 * set_cpu_context
1405 *
1406 * Set the new CPU context.
1407 */
1408 void set_cpu_context( const CONTEXT *context )
1409 {
1410 extern void CDECL __wine_restore_regs( const CONTEXT * ) DECLSPEC_NORETURN;
1411 __wine_restore_regs( context );
1412 }
1413
1414
1415 /***********************************************************************
1416 * copy_context
1417 *
1418 * Copy a register context according to the flags.
1419 */
1420 void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
1421 {
1422 flags &= ~CONTEXT_AMD64; /* get rid of CPU id */
1423 if (flags & CONTEXT_CONTROL)
1424 {
1425 to->Rbp = from->Rbp;
1426 to->Rip = from->Rip;
1427 to->Rsp = from->Rsp;
1428 to->SegCs = from->SegCs;
1429 to->SegSs = from->SegSs;
1430 to->EFlags = from->EFlags;
1431 }
1432 if (flags & CONTEXT_INTEGER)
1433 {
1434 to->Rax = from->Rax;
1435 to->Rcx = from->Rcx;
1436 to->Rdx = from->Rdx;
1437 to->Rbx = from->Rbx;
1438 to->Rsi = from->Rsi;
1439 to->Rdi = from->Rdi;
1440 to->R8 = from->R8;
1441 to->R9 = from->R9;
1442 to->R10 = from->R10;
1443 to->R11 = from->R11;
1444 to->R12 = from->R12;
1445 to->R13 = from->R13;
1446 to->R14 = from->R14;
1447 to->R15 = from->R15;
1448 }
1449 if (flags & CONTEXT_SEGMENTS)
1450 {
1451 to->SegDs = from->SegDs;
1452 to->SegEs = from->SegEs;
1453 to->SegFs = from->SegFs;
1454 to->SegGs = from->SegGs;
1455 }
1456 if (flags & CONTEXT_FLOATING_POINT)
1457 {
1458 to->MxCsr = from->MxCsr;
1459 to->u.FltSave = from->u.FltSave;
1460 }
1461 if (flags & CONTEXT_DEBUG_REGISTERS)
1462 {
1463 to->Dr0 = from->Dr0;
1464 to->Dr1 = from->Dr1;
1465 to->Dr2 = from->Dr2;
1466 to->Dr3 = from->Dr3;
1467 to->Dr6 = from->Dr6;
1468 to->Dr7 = from->Dr7;
1469 }
1470 }
1471
1472
1473 /***********************************************************************
1474 * context_to_server
1475 *
1476 * Convert a register context to the server format.
1477 */
1478 NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
1479 {
1480 DWORD flags = from->ContextFlags & ~CONTEXT_AMD64; /* get rid of CPU id */
1481
1482 memset( to, 0, sizeof(*to) );
1483 to->cpu = CPU_x86_64;
1484
1485 if (flags & CONTEXT_CONTROL)
1486 {
1487 to->flags |= SERVER_CTX_CONTROL;
1488 to->ctl.x86_64_regs.rbp = from->Rbp;
1489 to->ctl.x86_64_regs.rip = from->Rip;
1490 to->ctl.x86_64_regs.rsp = from->Rsp;
1491 to->ctl.x86_64_regs.cs = from->SegCs;
1492 to->ctl.x86_64_regs.ss = from->SegSs;
1493 to->ctl.x86_64_regs.flags = from->EFlags;
1494 }
1495 if (flags & CONTEXT_INTEGER)
1496 {
1497 to->flags |= SERVER_CTX_INTEGER;
1498 to->integer.x86_64_regs.rax = from->Rax;
1499 to->integer.x86_64_regs.rcx = from->Rcx;
1500 to->integer.x86_64_regs.rdx = from->Rdx;
1501 to->integer.x86_64_regs.rbx = from->Rbx;
1502 to->integer.x86_64_regs.rsi = from->Rsi;
1503 to->integer.x86_64_regs.rdi = from->Rdi;
1504 to->integer.x86_64_regs.r8 = from->R8;
1505 to->integer.x86_64_regs.r9 = from->R9;
1506 to->integer.x86_64_regs.r10 = from->R10;
1507 to->integer.x86_64_regs.r11 = from->R11;
1508 to->integer.x86_64_regs.r12 = from->R12;
1509 to->integer.x86_64_regs.r13 = from->R13;
1510 to->integer.x86_64_regs.r14 = from->R14;
1511 to->integer.x86_64_regs.r15 = from->R15;
1512 }
1513 if (flags & CONTEXT_SEGMENTS)
1514 {
1515 to->flags |= SERVER_CTX_SEGMENTS;
1516 to->seg.x86_64_regs.ds = from->SegDs;
1517 to->seg.x86_64_regs.es = from->SegEs;
1518 to->seg.x86_64_regs.fs = from->SegFs;
1519 to->seg.x86_64_regs.gs = from->SegGs;
1520 }
1521 if (flags & CONTEXT_FLOATING_POINT)
1522 {
1523 to->flags |= SERVER_CTX_FLOATING_POINT;
1524 memcpy( to->fp.x86_64_regs.fpregs, &from->u.FltSave, sizeof(to->fp.x86_64_regs.fpregs) );
1525 }
1526 if (flags & CONTEXT_DEBUG_REGISTERS)
1527 {
1528 to->flags |= SERVER_CTX_DEBUG_REGISTERS;
1529 to->debug.x86_64_regs.dr0 = from->Dr0;
1530 to->debug.x86_64_regs.dr1 = from->Dr1;
1531 to->debug.x86_64_regs.dr2 = from->Dr2;
1532 to->debug.x86_64_regs.dr3 = from->Dr3;
1533 to->debug.x86_64_regs.dr6 = from->Dr6;
1534 to->debug.x86_64_regs.dr7 = from->Dr7;
1535 }
1536 return STATUS_SUCCESS;
1537 }
1538
1539
1540 /***********************************************************************
1541 * context_from_server
1542 *
1543 * Convert a register context from the server format.
1544 */
1545 NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
1546 {
1547 if (from->cpu != CPU_x86_64) return STATUS_INVALID_PARAMETER;
1548
1549 to->ContextFlags = CONTEXT_AMD64;
1550 if (from->flags & SERVER_CTX_CONTROL)
1551 {
1552 to->ContextFlags |= CONTEXT_CONTROL;
1553 to->Rbp = from->ctl.x86_64_regs.rbp;
1554 to->Rip = from->ctl.x86_64_regs.rip;
1555 to->Rsp = from->ctl.x86_64_regs.rsp;
1556 to->SegCs = from->ctl.x86_64_regs.cs;
1557 to->SegSs = from->ctl.x86_64_regs.ss;
1558 to->EFlags = from->ctl.x86_64_regs.flags;
1559 }
1560
1561 if (from->flags & SERVER_CTX_INTEGER)
1562 {
1563 to->ContextFlags |= CONTEXT_INTEGER;
1564 to->Rax = from->integer.x86_64_regs.rax;
1565 to->Rcx = from->integer.x86_64_regs.rcx;
1566 to->Rdx = from->integer.x86_64_regs.rdx;
1567 to->Rbx = from->integer.x86_64_regs.rbx;
1568 to->Rsi = from->integer.x86_64_regs.rsi;
1569 to->Rdi = from->integer.x86_64_regs.rdi;
1570 to->R8 = from->integer.x86_64_regs.r8;
1571 to->R9 = from->integer.x86_64_regs.r9;
1572 to->R10 = from->integer.x86_64_regs.r10;
1573 to->R11 = from->integer.x86_64_regs.r11;
1574 to->R12 = from->integer.x86_64_regs.r12;
1575 to->R13 = from->integer.x86_64_regs.r13;
1576 to->R14 = from->integer.x86_64_regs.r14;
1577 to->R15 = from->integer.x86_64_regs.r15;
1578 }
1579 if (from->flags & SERVER_CTX_SEGMENTS)
1580 {
1581 to->ContextFlags |= CONTEXT_SEGMENTS;
1582 to->SegDs = from->seg.x86_64_regs.ds;
1583 to->SegEs = from->seg.x86_64_regs.es;
1584 to->SegFs = from->seg.x86_64_regs.fs;
1585 to->SegGs = from->seg.x86_64_regs.gs;
1586 }
1587 if (from->flags & SERVER_CTX_FLOATING_POINT)
1588 {
1589 to->ContextFlags |= CONTEXT_FLOATING_POINT;
1590 memcpy( &to->u.FltSave, from->fp.x86_64_regs.fpregs, sizeof(from->fp.x86_64_regs.fpregs) );
1591 to->MxCsr = to->u.FltSave.MxCsr;
1592 }
1593 if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
1594 {
1595 to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
1596 to->Dr0 = from->debug.x86_64_regs.dr0;
1597 to->Dr1 = from->debug.x86_64_regs.dr1;
1598 to->Dr2 = from->debug.x86_64_regs.dr2;
1599 to->Dr3 = from->debug.x86_64_regs.dr3;
1600 to->Dr6 = from->debug.x86_64_regs.dr6;
1601 to->Dr7 = from->debug.x86_64_regs.dr7;
1602 }
1603 return STATUS_SUCCESS;
1604 }
1605
1606
1607 extern void raise_func_trampoline( EXCEPTION_RECORD *rec, CONTEXT *context, raise_func func );
1608 __ASM_GLOBAL_FUNC( raise_func_trampoline,
1609 ".cfi_signal_frame\n\t"
1610 ".cfi_def_cfa %rbp,144\n\t" /* red zone + rip + rbp */
1611 ".cfi_rel_offset %rip,8\n\t"
1612 ".cfi_rel_offset %rbp,0\n\t"
1613 "call *%rdx\n\t"
1614 "int $3")
1615
1616 /***********************************************************************
1617 * setup_exception
1618 *
1619 * Setup a proper stack frame for the raise function, and modify the
1620 * sigcontext so that the return from the signal handler will call
1621 * the raise function.
1622 */
1623 static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func )
1624 {
1625 struct stack_layout
1626 {
1627 CONTEXT context;
1628 EXCEPTION_RECORD rec;
1629 ULONG64 rbp;
1630 ULONG64 rip;
1631 ULONG64 red_zone[16];
1632 } *stack;
1633 ULONG64 *rsp_ptr;
1634 DWORD exception_code = 0;
1635
1636 stack = (struct stack_layout *)(RSP_sig(sigcontext) & ~15);
1637
1638 /* stack sanity checks */
1639
1640 if (is_inside_signal_stack( stack ))
1641 {
1642 ERR( "nested exception on signal stack in thread %04x eip %016lx esp %016lx stack %p-%p\n",
1643 GetCurrentThreadId(), RIP_sig(sigcontext), RSP_sig(sigcontext),
1644 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1645 abort_thread(1);
1646 }
1647
1648 if (stack - 1 > stack || /* check for overflow in subtraction */
1649 (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack ||
1650 (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
1651 {
1652 WARN( "exception outside of stack limits in thread %04x eip %016lx esp %016lx stack %p-%p\n",
1653 GetCurrentThreadId(), RIP_sig(sigcontext), RSP_sig(sigcontext),
1654 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1655 }
1656 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096)
1657 {
1658 /* stack overflow on last page, unrecoverable */
1659 UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1);
1660 ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
1661 diff, GetCurrentThreadId(), RIP_sig(sigcontext),
1662 RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1663 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1664 abort_thread(1);
1665 }
1666 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit)
1667 {
1668 /* stack access below stack limit, may be recoverable */
1669 if (virtual_handle_stack_fault( stack - 1 )) exception_code = EXCEPTION_STACK_OVERFLOW;
1670 else
1671 {
1672 UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1);
1673 ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
1674 diff, GetCurrentThreadId(), RIP_sig(sigcontext),
1675 RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1676 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1677 abort_thread(1);
1678 }
1679 }
1680
1681 stack--; /* push the stack_layout structure */
1682 stack->rec.ExceptionRecord = NULL;
1683 stack->rec.ExceptionCode = exception_code;
1684 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1685 stack->rec.ExceptionAddress = (void *)RIP_sig(sigcontext);
1686 stack->rec.NumberParameters = 0;
1687 save_context( &stack->context, sigcontext );
1688
1689 /* store return address and %rbp without aligning, so that the offset is fixed */
1690 rsp_ptr = (ULONG64 *)RSP_sig(sigcontext) - 16;
1691 *(--rsp_ptr) = RIP_sig(sigcontext);
1692 *(--rsp_ptr) = RBP_sig(sigcontext);
1693
1694 /* now modify the sigcontext to return to the raise function */
1695 RIP_sig(sigcontext) = (ULONG_PTR)raise_func_trampoline;
1696 RDI_sig(sigcontext) = (ULONG_PTR)&stack->rec;
1697 RSI_sig(sigcontext) = (ULONG_PTR)&stack->context;
1698 RDX_sig(sigcontext) = (ULONG_PTR)func;
1699 RBP_sig(sigcontext) = (ULONG_PTR)rsp_ptr;
1700 RSP_sig(sigcontext) = (ULONG_PTR)stack;
1701 /* clear single-step, direction, and align check flag */
1702 EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
1703
1704 return &stack->rec;
1705 }
1706
1707
1708 /**********************************************************************
1709 * find_function_info
1710 */
1711 static RUNTIME_FUNCTION *find_function_info( ULONG64 pc, HMODULE module,
1712 RUNTIME_FUNCTION *func, ULONG size )
1713 {
1714 int min = 0;
1715 int max = size/sizeof(*func) - 1;
1716
1717 while (min <= max)
1718 {
1719 int pos = (min + max) / 2;
1720 if ((char *)pc < (char *)module + func[pos].BeginAddress) max = pos - 1;
1721 else if ((char *)pc >= (char *)module + func[pos].EndAddress) min = pos + 1;
1722 else
1723 {
1724 func += pos;
1725 while (func->UnwindData & 1) /* follow chained entry */
1726 func = (RUNTIME_FUNCTION *)((char *)module + (func->UnwindData & ~1));
1727 return func;
1728 }
1729 }
1730 return NULL;
1731 }
1732
1733
1734 /**********************************************************************
1735 * call_handler
1736 *
1737 * Call a single exception handler.
1738 * FIXME: Handle nested exceptions.
1739 */
1740 static NTSTATUS call_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch, CONTEXT *orig_context )
1741 {
1742 DWORD res;
1743
1744 dispatch->ControlPc = dispatch->ContextRecord->Rip;
1745
1746 TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
1747 dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
1748 res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
1749 TRACE( "handler at %p returned %u\n", dispatch->LanguageHandler, res );
1750
1751 switch (res)
1752 {
1753 case ExceptionContinueExecution:
1754 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
1755 *orig_context = *dispatch->ContextRecord;
1756 return STATUS_SUCCESS;
1757 case ExceptionContinueSearch:
1758 break;
1759 case ExceptionNestedException:
1760 break;
1761 default:
1762 return STATUS_INVALID_DISPOSITION;
1763 }
1764 return STATUS_UNHANDLED_EXCEPTION;
1765 }
1766
1767
1768 /**********************************************************************
1769 * call_teb_handler
1770 *
1771 * Call a single exception handler from the TEB chain.
1772 * FIXME: Handle nested exceptions.
1773 */
1774 static NTSTATUS call_teb_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
1775 EXCEPTION_REGISTRATION_RECORD *teb_frame, CONTEXT *orig_context )
1776 {
1777 EXCEPTION_REGISTRATION_RECORD *dispatcher;
1778 DWORD res;
1779
1780 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatcher=%p)\n",
1781 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, &dispatcher );
1782 res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, &dispatcher );
1783 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
1784
1785 switch (res)
1786 {
1787 case ExceptionContinueExecution:
1788 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
1789 *orig_context = *dispatch->ContextRecord;
1790 return STATUS_SUCCESS;
1791 case ExceptionContinueSearch:
1792 break;
1793 case ExceptionNestedException:
1794 break;
1795 default:
1796 return STATUS_INVALID_DISPOSITION;
1797 }
1798 return STATUS_UNHANDLED_EXCEPTION;
1799 }
1800
1801
1802 /**********************************************************************
1803 * call_stack_handlers
1804 *
1805 * Call the stack handlers chain.
1806 */
1807 static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *orig_context )
1808 {
1809 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
1810 UNWIND_HISTORY_TABLE table;
1811 RUNTIME_FUNCTION *dir;
1812 DISPATCHER_CONTEXT dispatch;
1813 CONTEXT context, new_context;
1814 LDR_MODULE *module;
1815 DWORD size;
1816 NTSTATUS status;
1817
1818 context = *orig_context;
1819 dispatch.TargetIp = 0;
1820 dispatch.ContextRecord = &context;
1821 dispatch.HistoryTable = &table;
1822 dispatch.ScopeIndex = 0; /* FIXME */
1823 for (;;)
1824 {
1825 new_context = context;
1826
1827 /* FIXME: should use the history table to make things faster */
1828
1829 dir = NULL;
1830 module = NULL;
1831 dispatch.ImageBase = 0;
1832
1833 if (!LdrFindEntryForAddress( (void *)context.Rip, &module ))
1834 {
1835 if (!(dir = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE,
1836 IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )) &&
1837 !(module->Flags & LDR_WINE_INTERNAL))
1838 {
1839 ERR( "module %s doesn't contain exception data, can't dispatch exception\n",
1840 debugstr_w(module->BaseDllName.Buffer) );
1841 break;
1842 }
1843 dispatch.ImageBase = (ULONG64)module->BaseAddress;
1844 }
1845
1846 if (!dir)
1847 {
1848 struct dwarf_eh_bases bases;
1849 const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context.Rip - 1), &bases );
1850 if (!fde)
1851 {
1852 /* assume leaf function */
1853 context.Rip = *(ULONG64 *)context.Rsp;
1854 context.Rsp += sizeof(ULONG64);
1855 continue;
1856 }
1857 status = dwarf_virtual_unwind( context.Rip, &dispatch.EstablisherFrame, &new_context,
1858 fde, &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
1859 if (status != STATUS_SUCCESS) return status;
1860 dispatch.FunctionEntry = NULL;
1861 if (dispatch.LanguageHandler && !module)
1862 {
1863 FIXME( "calling personality routine in system library not supported yet\n" );
1864 dispatch.LanguageHandler = NULL;
1865 }
1866 }
1867 else
1868 {
1869 if (!(dispatch.FunctionEntry = find_function_info( context.Rip, module->BaseAddress,
1870 dir, size )))
1871 {
1872 /* leaf function */
1873 context.Rip = *(ULONG64 *)context.Rsp;
1874 context.Rsp += sizeof(ULONG64);
1875 continue;
1876 }
1877 dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_EHANDLER, dispatch.ImageBase,
1878 context.Rip, dispatch.FunctionEntry,
1879 &new_context, &dispatch.HandlerData,
1880 &dispatch.EstablisherFrame, NULL );
1881 }
1882
1883 if (!dispatch.EstablisherFrame) break;
1884
1885 if ((dispatch.EstablisherFrame & 7) ||
1886 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
1887 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
1888 {
1889 ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
1890 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1891 rec->ExceptionFlags |= EH_STACK_INVALID;
1892 break;
1893 }
1894
1895 if (dispatch.LanguageHandler)
1896 {
1897 status = call_handler( rec, &dispatch, orig_context );
1898 if (status != STATUS_UNHANDLED_EXCEPTION) return status;
1899 }
1900 /* hack: call wine handlers registered in the tib list */
1901 else while ((ULONG64)teb_frame < new_context.Rsp)
1902 {
1903 TRACE( "found wine frame %p rsp %lx handler %p\n",
1904 teb_frame, new_context.Rsp, teb_frame->Handler );
1905 dispatch.EstablisherFrame = (ULONG64)teb_frame;
1906 context = *orig_context;
1907 status = call_teb_handler( rec, &dispatch, teb_frame, orig_context );
1908 if (status != STATUS_UNHANDLED_EXCEPTION) return status;
1909 teb_frame = teb_frame->Prev;
1910 }
1911
1912 if (new_context.Rsp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break;
1913 context = new_context;
1914 }
1915 return STATUS_UNHANDLED_EXCEPTION;
1916 }
1917
1918
1919 /*******************************************************************
1920 * raise_exception
1921 *
1922 * Implementation of NtRaiseException.
1923 */
1924 static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
1925 {
1926 NTSTATUS status;
1927
1928 if (first_chance)
1929 {
1930 DWORD c;
1931
1932 TRACE( "code=%x flags=%x addr=%p ip=%lx tid=%04x\n",
1933 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
1934 context->Rip, GetCurrentThreadId() );
1935 for (c = 0; c < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); c++)
1936 TRACE( " info[%d]=%08lx\n", c, rec->ExceptionInformation[c] );
1937 if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
1938 {
1939 if (rec->ExceptionInformation[1] >> 16)
1940 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
1941 rec->ExceptionAddress,
1942 (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
1943 else
1944 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
1945 rec->ExceptionAddress,
1946 (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
1947 }
1948 else
1949 {
1950 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
1951 context->Rax, context->Rbx, context->Rcx, context->Rdx );
1952 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
1953 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
1954 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
1955 context->R8, context->R9, context->R10, context->R11 );
1956 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
1957 context->R12, context->R13, context->R14, context->R15 );
1958 }
1959 status = send_debug_event( rec, TRUE, context );
1960 if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
1961 return STATUS_SUCCESS;
1962
1963 if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
1964 return STATUS_SUCCESS;
1965
1966 if ((status = call_stack_handlers( rec, context )) != STATUS_UNHANDLED_EXCEPTION)
1967 return status;
1968 }
1969
1970 /* last chance exception */
1971
1972 status = send_debug_event( rec, FALSE, context );
1973 if (status != DBG_CONTINUE)
1974 {
1975 if (rec->ExceptionFlags & EH_STACK_INVALID)
1976 ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
1977 else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
1978 ERR("Process attempted to continue execution after noncontinuable exception.\n");
1979 else
1980 ERR("Unhandled exception code %x flags %x addr %p\n",
1981 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
1982 NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
1983 }
1984 return STATUS_SUCCESS;
1985 }
1986
1987
1988 /**********************************************************************
1989 * raise_segv_exception
1990 */
1991 static void raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1992 {
1993 NTSTATUS status;
1994
1995 switch(rec->ExceptionCode)
1996 {
1997 case EXCEPTION_ACCESS_VIOLATION:
1998 if (rec->NumberParameters == 2)
1999 {
2000 if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
2001 rec->ExceptionInformation[0] )))
2002 set_cpu_context( context );
2003 }
2004 break;
2005 }
2006 status = raise_exception( rec, context, TRUE );
2007 if (status) raise_status( status, rec );
2008 set_cpu_context( context );
2009 }
2010
2011
2012 /**********************************************************************
2013 * raise_generic_exception
2014 *
2015 * Generic raise function for exceptions that don't need special treatment.
2016 */
2017 static void raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2018 {
2019 NTSTATUS status = raise_exception( rec, context, TRUE );
2020 if (status) raise_status( status, rec );
2021 set_cpu_context( context );
2022 }
2023
2024
2025 /**********************************************************************
2026 * segv_handler
2027 *
2028 * Handler for SIGSEGV and related errors.
2029 */
2030 static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2031 {
2032 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_segv_exception );
2033 ucontext_t *ucontext = sigcontext;
2034
2035 switch(TRAP_sig(ucontext))
2036 {
2037 case TRAP_x86_OFLOW: /* Overflow exception */
2038 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2039 break;
2040 case TRAP_x86_BOUND: /* Bound range exception */
2041 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2042 break;
2043 case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
2044 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2045 break;
2046 case TRAP_x86_STKFLT: /* Stack fault */
2047 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2048 break;
2049 case TRAP_x86_SEGNPFLT: /* Segment not present exception */
2050 case TRAP_x86_PROTFLT: /* General protection fault */
2051 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2052 rec->ExceptionCode = ERROR_sig(ucontext) ? EXCEPTION_ACCESS_VIOLATION : EXCEPTION_PRIV_INSTRUCTION;
2053 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2054 break;
2055 case TRAP_x86_PAGEFLT: /* Page fault */
2056 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2057 rec->NumberParameters = 2;
2058 rec->ExceptionInformation[0] = (ERROR_sig(ucontext) & 2) != 0;
2059 rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
2060 break;
2061 case TRAP_x86_ALIGNFLT: /* Alignment check exception */
2062 rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
2063 break;
2064 default:
2065 ERR( "Got unexpected trap %ld\n", TRAP_sig(ucontext) );
2066 /* fall through */
2067 case TRAP_x86_NMI: /* NMI interrupt */
2068 case TRAP_x86_DNA: /* Device not available exception */
2069 case TRAP_x86_DOUBLEFLT: /* Double fault exception */
2070 case TRAP_x86_TSSFLT: /* Invalid TSS exception */
2071 case TRAP_x86_MCHK: /* Machine check exception */
2072 case TRAP_x86_CACHEFLT: /* Cache flush exception */
2073 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2074 break;
2075 }
2076 }
2077
2078 /**********************************************************************
2079 * trap_handler
2080 *
2081 * Handler for SIGTRAP.
2082 */
2083 static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2084 {
2085 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2086
2087 switch (siginfo->si_code)
2088 {
2089 case TRAP_TRACE: /* Single-step exception */
2090 rec->ExceptionCode = EXCEPTION_SINGLE_STEP;
2091 break;
2092 case TRAP_BRKPT: /* Breakpoint exception */
2093 rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */
2094 /* fall through */
2095 default:
2096 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
2097 break;
2098 }
2099 }
2100
2101 /**********************************************************************
2102 * fpe_handler
2103 *
2104 * Handler for SIGFPE.
2105 */
2106 static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2107 {
2108 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2109
2110 switch (siginfo->si_code)
2111 {
2112 case FPE_FLTSUB:
2113 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2114 break;
2115 case FPE_INTDIV:
2116 rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
2117 break;
2118 case FPE_INTOVF:
2119 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2120 break;
2121 case FPE_FLTDIV:
2122 rec->ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
2123 break;
2124 case FPE_FLTOVF:
2125 rec->ExceptionCode = EXCEPTION_FLT_OVERFLOW;
2126 break;
2127 case FPE_FLTUND:
2128 rec->ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
2129 break;
2130 case FPE_FLTRES:
2131 rec->ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
2132 break;
2133 case FPE_FLTINV:
2134 default:
2135 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2136 break;
2137 }
2138 }
2139
2140 /**********************************************************************
2141 * int_handler
2142 *
2143 * Handler for SIGINT.
2144 */
2145 static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2146 {
2147 if (!dispatch_signal(SIGINT))
2148 {
2149 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2150 rec->ExceptionCode = CONTROL_C_EXIT;
2151 }
2152 }
2153
2154
2155 /**********************************************************************
2156 * abrt_handler
2157 *
2158 * Handler for SIGABRT.
2159 */
2160 static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2161 {
2162 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2163 rec->ExceptionCode = EXCEPTION_WINE_ASSERTION;
2164 rec->ExceptionFlags = EH_NONCONTINUABLE;
2165 }
2166
2167
2168 /**********************************************************************
2169 * quit_handler
2170 *
2171 * Handler for SIGQUIT.
2172 */
2173 static void quit_handler( int signal, siginfo_t *siginfo, void *ucontext )
2174 {
2175 abort_thread(0);
2176 }
2177
2178
2179 /**********************************************************************
2180 * usr1_handler
2181 *
2182 * Handler for SIGUSR1, used to signal a thread that it got suspended.
2183 */
2184 static void usr1_handler( int signal, siginfo_t *siginfo, void *ucontext )
2185 {
2186 CONTEXT context;
2187
2188 save_context( &context, ucontext );
2189 wait_suspend( &context );
2190 restore_context( &context, ucontext );
2191 }
2192
2193
2194 /***********************************************************************
2195 * __wine_set_signal_handler (NTDLL.@)
2196 */
2197 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
2198 {
2199 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
2200 if (handlers[sig] != NULL) return -2;
2201 handlers[sig] = wsh;
2202 return 0;
2203 }
2204
2205
2206 /**********************************************************************
2207 * signal_alloc_thread
2208 */
2209 NTSTATUS signal_alloc_thread( TEB **teb )
2210 {
2211 static size_t sigstack_zero_bits;
2212 SIZE_T size;
2213 NTSTATUS status;
2214
2215 if (!sigstack_zero_bits)
2216 {
2217 size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
2218 /* find the first power of two not smaller than min_size */
2219 sigstack_zero_bits = 12;
2220 while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
2221 signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
2222 assert( sizeof(TEB) <= teb_size );
2223 }
2224
2225 size = 1 << sigstack_zero_bits;
2226 *teb = NULL;
2227 if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
2228 &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
2229 {
2230 (*teb)->Tib.Self = &(*teb)->Tib;
2231 (*teb)->Tib.ExceptionList = (void *)~0UL;
2232 }
2233 return status;
2234 }
2235
2236
2237 /**********************************************************************
2238 * signal_free_thread
2239 */
2240 void signal_free_thread( TEB *teb )
2241 {
2242 SIZE_T size;
2243
2244 if (teb->DeallocationStack)
2245 {
2246 size = 0;
2247 NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
2248 }
2249 size = 0;
2250 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
2251 }
2252
2253
2254 /**********************************************************************
2255 * signal_init_thread
2256 */
2257 void signal_init_thread( TEB *teb )
2258 {
2259 stack_t ss;
2260
2261 #ifdef __linux__
2262 arch_prctl( ARCH_SET_GS, teb );
2263 #else
2264 # error Please define setting %gs for your architecture
2265 #endif
2266
2267 ss.ss_sp = (char *)teb + teb_size;
2268 ss.ss_size = signal_stack_size;
2269 ss.ss_flags = 0;
2270 if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
2271 }
2272
2273 /**********************************************************************
2274 * signal_init_process
2275 */
2276 void signal_init_process(void)
2277 {
2278 struct sigaction sig_act;
2279
2280 sig_act.sa_mask = server_block_set;
2281 sig_act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
2282
2283 sig_act.sa_sigaction = int_handler;
2284 if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
2285 sig_act.sa_sigaction = fpe_handler;
2286 if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
2287 sig_act.sa_sigaction = abrt_handler;
2288 if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
2289 sig_act.sa_sigaction = quit_handler;
2290 if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
2291 sig_act.sa_sigaction = usr1_handler;
2292 if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
2293
2294 sig_act.sa_sigaction = segv_handler;
2295 if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
2296 if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
2297 #ifdef SIGBUS
2298 if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
2299 #endif
2300
2301 #ifdef SIGTRAP
2302 sig_act.sa_sigaction = trap_handler;
2303 if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
2304 #endif
2305 return;
2306
2307 error:
2308 perror("sigaction");
2309 exit(1);
2310 }
2311
2312
2313 /**********************************************************************
2314 * RtlAddFunctionTable (NTDLL.@)
2315 */
2316 BOOLEAN CDECL RtlAddFunctionTable( RUNTIME_FUNCTION *table, DWORD count, DWORD64 addr )
2317 {
2318 FIXME( "%p %u %lx: stub\n", table, count, addr );
2319 return FALSE;
2320 }
2321
2322
2323 /**********************************************************************
2324 * RtlDeleteFunctionTable (NTDLL.@)
2325 */
2326 BOOLEAN CDECL RtlDeleteFunctionTable( RUNTIME_FUNCTION *table )
2327 {
2328 FIXME( "%p: stub\n", table );
2329 return FALSE;
2330 }
2331
2332
2333 /**********************************************************************
2334 * RtlLookupFunctionEntry (NTDLL.@)
2335 */
2336 PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry( ULONG64 pc, ULONG64 *base, UNWIND_HISTORY_TABLE *table )
2337 {
2338 LDR_MODULE *module;
2339 RUNTIME_FUNCTION *func;
2340 ULONG size;
2341
2342 /* FIXME: should use the history table to make things faster */
2343
2344 if (LdrFindEntryForAddress( (void *)pc, &module ))
2345 {
2346 WARN( "module not found for %lx\n", pc );
2347 return NULL;
2348 }
2349 if (!(func = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE,
2350 IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )))
2351 {
2352 WARN( "no exception table found in module %p pc %lx\n", module->BaseAddress, pc );
2353 return NULL;
2354 }
2355 func = find_function_info( pc, module->BaseAddress, func, size );
2356 if (func) *base = (ULONG64)module->BaseAddress;
2357 return func;
2358 }
2359
2360 static ULONG64 get_int_reg( CONTEXT *context, int reg )
2361 {
2362 return *(&context->Rax + reg);
2363 }
2364
2365 static void set_int_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, ULONG64 val )
2366 {
2367 *(&context->Rax + reg) = val;
2368 if (ctx_ptr) ctx_ptr->u2.IntegerContext[reg] = &context->Rax + reg;
2369 }
2370
2371 static void set_float_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, M128A val )
2372 {
2373 *(&context->u.s.Xmm0 + reg) = val;
2374 if (ctx_ptr) ctx_ptr->u1.FloatingContext[reg] = &context->u.s.Xmm0 + reg;
2375 }
2376
2377 static int get_opcode_size( struct opcode op )
2378 {
2379 switch (op.code)
2380 {
2381 case UWOP_ALLOC_LARGE:
2382 return 2 + (op.info != 0);
2383 case UWOP_SAVE_NONVOL:
2384 case UWOP_SAVE_XMM128:
2385 return 2;
2386 case UWOP_SAVE_NONVOL_FAR:
2387 case UWOP_SAVE_XMM128_FAR:
2388 return 3;
2389 default:
2390 return 1;
2391 }
2392 }
2393
2394 static BOOL is_inside_epilog( BYTE *pc )
2395 {
2396 /* add or lea must be the first instruction, and it must have a rex.W prefix */
2397 if ((pc[0] & 0xf8) == 0x48)
2398 {
2399 switch (pc[1])
2400 {
2401 case 0x81: /* add $nnnn,%rsp */
2402 if (pc[0] == 0x48 && pc[2] == 0xc4)
2403 {
2404 pc += 7;
2405 break;
2406 }
2407 return FALSE;
2408 case 0x83: /* add $n,%rsp */
2409 if (pc[0] == 0x48 && pc[2] == 0xc4)
2410 {
2411 pc += 4;
2412 break;
2413 }
2414 return FALSE;
2415 case 0x8d: /* lea n(reg),%rsp */
2416 if (pc[0] & 0x06) return FALSE; /* rex.RX must be cleared */
2417 if (((pc[2] >> 3) & 7) != 4) return FALSE; /* dest reg mus be %rsp */
2418 if ((pc[2] & 7) == 4) return FALSE; /* no SIB byte allowed */
2419 if ((pc[2] >> 6) == 1) /* 8-bit offset */
2420 {
2421 pc += 4;
2422 break;
2423 }
2424 if ((pc[2] >> 6) == 2) /* 32-bit offset */
2425 {
2426 pc += 7;
2427 break;
2428 }
2429 return FALSE;
2430 }
2431 }
2432
2433 /* now check for various pop instructions */
2434
2435 for (;;)
2436 {
2437 BYTE rex = 0;
2438
2439 if ((*pc & 0xf0) == 0x40) rex = *pc++ & 0x0f; /* rex prefix */
2440
2441 switch (*pc)
2442 {
2443 case 0x58: /* pop %rax/%r8 */
2444 case 0x59: /* pop %rcx/%r9 */
2445 case 0x5a: /* pop %rdx/%r10 */
2446 case 0x5b: /* pop %rbx/%r11 */
2447 case 0x5c: /* pop %rsp/%r12 */
2448 case 0x5d: /* pop %rbp/%r13 */
2449 case 0x5e: /* pop %rsi/%r14 */
2450 case 0x5f: /* pop %rdi/%r15 */
2451 pc++;
2452 continue;
2453 case 0xc2: /* ret $nn */
2454 case 0xc3: /* ret */
2455 return TRUE;
2456 /* FIXME: add various jump instructions */
2457 }
2458 return FALSE;
2459 }
2460 }
2461
2462 /* execute a function epilog, which must have been validated with is_inside_epilog() */
2463 static void interpret_epilog( BYTE *pc, CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
2464 {
2465 for (;;)
2466 {
2467 BYTE rex = 0;
2468
2469 if ((*pc & 0xf0) == 0x40) rex = *pc++ & 0x0f; /* rex prefix */
2470
2471 switch (*pc)
2472 {
2473 case 0x58: /* pop %rax/r8 */
2474 case 0x59: /* pop %rcx/r9 */
2475 case 0x5a: /* pop %rdx/r10 */
2476 case 0x5b: /* pop %rbx/r11 */
2477 case 0x5c: /* pop %rsp/r12 */
2478 case 0x5d: /* pop %rbp/r13 */
2479 case 0x5e: /* pop %rsi/r14 */
2480 case 0x5f: /* pop %rdi/r15 */
2481 set_int_reg( context, ctx_ptr, *pc - 0x58 + (rex & 1) * 8, *(ULONG64 *)context->Rsp );
2482 context->Rsp += sizeof(ULONG64);
2483 pc++;
2484 continue;
2485 case 0x81: /* add $nnnn,%rsp */
2486 context->Rsp += *(LONG *)(pc + 2);
2487 pc += 2 + sizeof(LONG);
2488 continue;
2489 case 0x83: /* add $n,%rsp */
2490 context->Rsp += (signed char)pc[2];
2491 pc += 3;
2492 continue;
2493 case 0x8d:
2494 if ((pc[1] >> 6) == 1) /* lea n(reg),%rsp */
2495 {
2496 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + (signed char)pc[2];
2497 pc += 3;
2498 }
2499 else /* lea nnnn(reg),%rsp */
2500 {
2501 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + *(LONG *)(pc + 2);
2502 pc += 2 + sizeof(LONG);
2503 }
2504 continue;
2505 case 0xc2: /* ret $nn */
2506 context->Rip = *(ULONG64 *)context->Rsp;
2507 context->Rsp += sizeof(ULONG64) + *(WORD *)(pc + 1);
2508 return;
2509 case 0xc3: /* ret */
2510 context->Rip = *(ULONG64 *)context->Rsp;
2511 context->Rsp += sizeof(ULONG64);
2512 return;
2513 /* FIXME: add various jump instructions */
2514 }
2515 return;
2516 }
2517 }
2518
2519 /**********************************************************************
2520 * RtlVirtualUnwind (NTDLL.@)
2521 */
2522 PVOID WINAPI RtlVirtualUnwind( ULONG type, ULONG64 base, ULONG64 pc,
2523 RUNTIME_FUNCTION *function, CONTEXT *context,
2524 PVOID *data, ULONG64 *frame_ret,
2525 KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
2526 {
2527 union handler_data *handler_data;
2528 ULONG64 frame, off;
2529 struct UNWIND_INFO *info;
2530 unsigned int i, prolog_offset;
2531
2532 TRACE( "type %x rip %lx rsp %lx\n", type, pc, context->Rsp );
2533 if (TRACE_ON(seh)) dump_unwind_info( base, function );
2534
2535 frame = *frame_ret = context->Rsp;
2536 for (;;)
2537 {
2538 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
2539 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
2540
2541 if (info->version != 1)
2542 {
2543 FIXME( "unknown unwind info version %u at %p\n", info->version, info );
2544 return NULL;
2545 }
2546
2547 if (info->frame_reg)
2548 frame = get_int_reg( context, info->frame_reg ) - info->frame_offset * 16;
2549
2550 /* check if in prolog */
2551 if (pc >= base + function->BeginAddress && pc < base + function->BeginAddress + info->prolog)
2552 {
2553 prolog_offset = pc - base - function->BeginAddress;
2554 }
2555 else
2556 {
2557 prolog_offset = ~0;
2558 if (is_inside_epilog( (BYTE *)pc ))
2559 {
2560 interpret_epilog( (BYTE *)pc, context, ctx_ptr );
2561 *frame_ret = frame;
2562 return NULL;
2563 }
2564 }
2565
2566 for (i = 0; i < info->count; i += get_opcode_size(info->opcodes[i]))
2567 {
2568 if (prolog_offset < info->opcodes[i].offset) continue; /* skip it */
2569
2570 switch (info->opcodes[i].code)
2571 {
2572 case UWOP_PUSH_NONVOL: /* pushq %reg */
2573 set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)context->Rsp );
2574 context->Rsp += sizeof(ULONG64);
2575 break;
2576 case UWOP_ALLOC_LARGE: /* subq $nn,%rsp */
2577 if (info->opcodes[i].info) context->Rsp += *(DWORD *)&info->opcodes[i+1];
2578 else context->Rsp += *(USHORT *)&info->opcodes[i+1] * 8;
2579 break;
2580 case UWOP_ALLOC_SMALL: /* subq $n,%rsp */
2581 context->Rsp += (info->opcodes[i].info + 1) * 8;
2582 break;
2583 case UWOP_SET_FPREG: /* leaq nn(%rsp),%framereg */
2584 context->Rsp = *frame_ret = frame;
2585 break;
2586 case UWOP_SAVE_NONVOL: /* movq %reg,n(%rsp) */
2587 off = frame + *(USHORT *)&info->opcodes[i+1] * 8;
2588 set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)off );
2589 break;
2590 case UWOP_SAVE_NONVOL_FAR: /* movq %reg,nn(%rsp) */
2591 off = frame + *(DWORD *)&info->opcodes[i+1];
2592 set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)off );
2593 break;
2594 case UWOP_SAVE_XMM128: /* movaps %xmmreg,n(%rsp) */
2595 off = frame + *(USHORT *)&info->opcodes[i+1] * 16;
2596 set_float_reg( context, ctx_ptr, info->opcodes[i].info, *(M128A *)off );
2597 break;
2598 case UWOP_SAVE_XMM128_FAR: /* movaps %xmmreg,nn(%rsp) */
2599 off = frame + *(DWORD *)&info->opcodes[i+1];
2600 set_float_reg( context, ctx_ptr, info->opcodes[i].info, *(M128A *)off );
2601 break;
2602 case UWOP_PUSH_MACHFRAME:
2603 FIXME( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
2604 break;
2605 default:
2606 FIXME( "unknown code %u\n", info->opcodes[i].code );
2607 break;
2608 }
2609 }
2610
2611 if (!(info->flags & UNW_FLAG_CHAININFO)) break;
2612 function = &handler_data->chain; /* restart with the chained info */
2613 }
2614
2615 /* now pop return address */
2616 context->Rip = *(ULONG64 *)context->Rsp;
2617 context->Rsp += sizeof(ULONG64);
2618
2619 if (!(info->flags & type)) return NULL; /* no matching handler */
2620 if (prolog_offset != ~0) return NULL; /* inside prolog */
2621
2622 *data = &handler_data->handler + 1;
2623 return (char *)base + handler_data->handler;
2624 }
2625
2626
2627 /**********************************************************************
2628 * call_unwind_handler
2629 *
2630 * Call a single unwind handler.
2631 * FIXME: Handle nested exceptions.
2632 */
2633 static void call_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch )
2634 {
2635 DWORD res;
2636
2637 dispatch->ControlPc = dispatch->ContextRecord->Rip;
2638
2639 TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
2640 dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
2641 res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
2642 TRACE( "handler %p returned %x\n", dispatch->LanguageHandler, res );
2643
2644 switch (res)
2645 {
2646 case ExceptionContinueSearch:
2647 break;
2648 case ExceptionCollidedUnwind:
2649 FIXME( "ExceptionCollidedUnwind not supported yet\n" );
2650 break;
2651 default:
2652 raise_status( STATUS_INVALID_DISPOSITION, rec );
2653 break;
2654 }
2655 }
2656
2657
2658 /**********************************************************************
2659 * call_teb_unwind_handler
2660 *
2661 * Call a single unwind handler from the TEB chain.
2662 * FIXME: Handle nested exceptions.
2663 */
2664 static void call_teb_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
2665 EXCEPTION_REGISTRATION_RECORD *teb_frame )
2666 {
2667 EXCEPTION_REGISTRATION_RECORD *dispatcher;
2668 DWORD res;
2669
2670 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatcher=%p)\n",
2671 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, &dispatcher );
2672 res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, &dispatcher );
2673 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
2674
2675 switch (res)
2676 {
2677 case ExceptionContinueSearch:
2678 break;
2679 case ExceptionCollidedUnwind:
2680 FIXME( "ExceptionCollidedUnwind not supported yet\n" );
2681 break;
2682 default:
2683 raise_status( STATUS_INVALID_DISPOSITION, rec );
2684 break;
2685 }
2686 }
2687
2688
2689 /*******************************************************************
2690 * RtlUnwindEx (NTDLL.@)
2691 */
2692 void WINAPI RtlUnwindEx( ULONG64 end_frame, ULONG64 target_ip, EXCEPTION_RECORD *rec,
2693 ULONG64 retval, CONTEXT *orig_context, UNWIND_HISTORY_TABLE *table )
2694 {
2695 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
2696 EXCEPTION_RECORD record;
2697 RUNTIME_FUNCTION *dir;
2698 DISPATCHER_CONTEXT dispatch;
2699 CONTEXT context, new_context;
2700 LDR_MODULE *module;
2701 NTSTATUS status;
2702 DWORD size;
2703
2704 /* build an exception record, if we do not have one */
2705 if (!rec)
2706 {
2707 record.ExceptionCode = STATUS_UNWIND;
2708 record.ExceptionFlags = 0;
2709 record.ExceptionRecord = NULL;
2710 record.ExceptionAddress = (void *)orig_context->Rip;
2711 record.NumberParameters = 0;
2712 rec = &record;
2713 }
2714
2715 rec->ExceptionFlags |= EH_UNWINDING | (end_frame ? 0 : EH_EXIT_UNWIND);
2716
2717 TRACE( "code=%x flags=%x end_frame=%lx target_ip=%lx rip=%016lx\n",
2718 rec->ExceptionCode, rec->ExceptionFlags, end_frame, target_ip, orig_context->Rip );
2719 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
2720 orig_context->Rax, orig_context->Rbx, orig_context->Rcx, orig_context->Rdx );
2721 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
2722 orig_context->Rsi, orig_context->Rdi, orig_context->Rbp, orig_context->Rsp );
2723 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
2724 orig_context->R8, orig_context->R9, orig_context->R10, orig_context->R11 );
2725 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
2726 orig_context->R12, orig_context->R13, orig_context->R14, orig_context->R15 );
2727
2728 context = *orig_context;
2729 dispatch.EstablisherFrame = context.Rsp;
2730 dispatch.TargetIp = target_ip;
2731 dispatch.ContextRecord = &context;
2732 dispatch.HistoryTable = table;
2733
2734 while (dispatch.EstablisherFrame != end_frame)
2735 {
2736 new_context = context;
2737
2738 /* FIXME: should use the history table to make things faster */
2739
2740 dir = NULL;
2741 module = NULL;
2742 dispatch.ImageBase = 0;
2743 dispatch.ScopeIndex = 0; /* FIXME */
2744
2745 if (!LdrFindEntryForAddress( (void *)context.Rip, &module ))
2746 {
2747 if (!(dir = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE,
2748 IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )) &&
2749 !(module->Flags & LDR_WINE_INTERNAL))
2750 {
2751 ERR( "module %s doesn't contain exception data, can't unwind exception\n",
2752 debugstr_w(module->BaseDllName.Buffer) );
2753 raise_status( STATUS_BAD_FUNCTION_TABLE, rec );
2754 }
2755 dispatch.ImageBase = (ULONG64)module->BaseAddress;
2756 }
2757
2758 if (!dir)
2759 {
2760 struct dwarf_eh_bases bases;
2761 const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context.Rip - 1), &bases );
2762 if (!fde)
2763 {
2764 /* assume leaf function */
2765 context.Rip = *(ULONG64 *)context.Rsp;
2766 context.Rsp += sizeof(ULONG64);
2767 continue;
2768 }
2769 dispatch.FunctionEntry = NULL;
2770 status = dwarf_virtual_unwind( context.Rip, &dispatch.EstablisherFrame, &new_context, fde,
2771 &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
2772 if (status != STATUS_SUCCESS) raise_status( status, rec );
2773 if (dispatch.LanguageHandler && !module)
2774 {
2775 FIXME( "calling personality routine in system library not supported yet\n" );
2776 dispatch.LanguageHandler = NULL;
2777 }
2778 }
2779 else
2780 {
2781 if (!(dispatch.FunctionEntry = find_function_info( context.Rip, module->BaseAddress,
2782 dir, size )))
2783 {
2784 /* leaf function */
2785 context.Rip = *(ULONG64 *)context.Rsp;
2786 context.Rsp += sizeof(ULONG64);
2787 continue;
2788 }
2789 dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_UHANDLER, dispatch.ImageBase,
2790 context.Rip, dispatch.FunctionEntry,
2791 &new_context, &dispatch.HandlerData,
2792 &dispatch.EstablisherFrame, NULL );
2793 }
2794
2795 if (!dispatch.EstablisherFrame) break;
2796
2797 if (is_inside_signal_stack( (void *)dispatch.EstablisherFrame ))
2798 {
2799 TRACE( "frame %lx is inside signal stack (%p-%p)\n", dispatch.EstablisherFrame,
2800 get_signal_stack(), (char *)get_signal_stack() + signal_stack_size );
2801 context = new_context;
2802 continue;
2803 }
2804
2805 if ((dispatch.EstablisherFrame & 7) ||
2806 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
2807 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
2808 {
2809 ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
2810 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2811 rec->ExceptionFlags |= EH_STACK_INVALID;
2812 break;
2813 }
2814
2815 if (dispatch.LanguageHandler)
2816 {
2817 if (end_frame && (dispatch.EstablisherFrame > end_frame))
2818 {
2819 ERR( "invalid end frame %lx/%lx\n", dispatch.EstablisherFrame, end_frame );
2820 raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
2821 }
2822 call_unwind_handler( rec, &dispatch );
2823 }
2824 else /* hack: call builtin handlers registered in the tib list */
2825 {
2826 while ((ULONG64)teb_frame < new_context.Rsp && (ULONG64)teb_frame < end_frame)
2827 {
2828 TRACE( "found builtin frame %p handler %p\n", teb_frame, teb_frame->Handler );
2829 dispatch.EstablisherFrame = (ULONG64)teb_frame;
2830 call_teb_unwind_handler( rec, &dispatch, teb_frame );
2831 teb_frame = __wine_pop_frame( teb_frame );
2832 }
2833 if ((ULONG64)teb_frame == end_frame && end_frame < new_context.Rsp) break;
2834 dispatch.EstablisherFrame = new_context.Rsp;
2835 }
2836
2837 context = new_context;
2838 }
2839 context.Rax = retval;
2840 context.Rip = target_ip;
2841 TRACE( "returning to %lx stack %lx\n", context.Rip, context.Rsp );
2842 set_cpu_context( &context );
2843 }
2844
2845
2846 /*******************************************************************
2847 * RtlUnwind (NTDLL.@)
2848 */
2849 void WINAPI __regs_RtlUnwind( ULONG64 frame, ULONG64 target_ip, EXCEPTION_RECORD *rec,
2850 ULONG64 retval, CONTEXT *context )
2851 {
2852 RtlUnwindEx( frame, target_ip, rec, retval, context, NULL );
2853 }
2854 DEFINE_REGS_ENTRYPOINT( RtlUnwind, 4 )
2855
2856
2857 /*******************************************************************
2858 * __C_specific_handler (NTDLL.@)
2859 */
2860 EXCEPTION_DISPOSITION WINAPI __C_specific_handler( EXCEPTION_RECORD *rec,
2861 ULONG64 frame,
2862 CONTEXT *context,
2863 struct _DISPATCHER_CONTEXT *dispatch )
2864 {
2865 SCOPE_TABLE *table = dispatch->HandlerData;
2866 ULONG i;
2867
2868 TRACE( "%p %lx %p %p\n", rec, frame, context, dispatch );
2869 if (TRACE_ON(seh)) dump_scope_table( dispatch->ImageBase, table );
2870
2871 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) /* FIXME */
2872 return ExceptionContinueSearch;
2873
2874 for (i = 0; i < table->Count; i++)
2875 {
2876 if (context->Rip >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
2877 context->Rip < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
2878 {
2879 if (!table->ScopeRecord[i].JumpTarget) continue;
2880 if (table->ScopeRecord[i].HandlerAddress != EXCEPTION_EXECUTE_HANDLER)
2881 {
2882 EXCEPTION_POINTERS ptrs;
2883 PC_LANGUAGE_EXCEPTION_HANDLER filter;
2884
2885 filter = (PC_LANGUAGE_EXCEPTION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
2886 ptrs.ExceptionRecord = rec;
2887 ptrs.ContextRecord = context;
2888 TRACE( "calling filter %p ptrs %p frame %lx\n", filter, &ptrs, frame );
2889 switch (filter( &ptrs, frame ))
2890 {
2891 case EXCEPTION_EXECUTE_HANDLER:
2892 break;
2893 case EXCEPTION_CONTINUE_SEARCH:
2894 continue;
2895 case EXCEPTION_CONTINUE_EXECUTION:
2896 return ExceptionContinueExecution;
2897 }
2898 }
2899 TRACE( "unwinding to target %lx\n", dispatch->ImageBase + table->ScopeRecord[i].JumpTarget );
2900 RtlUnwindEx( frame, dispatch->ImageBase + table->ScopeRecord[i].JumpTarget,
2901 rec, 0, context, dispatch->HistoryTable );
2902 }
2903 }
2904 return ExceptionContinueSearch;
2905 }
2906
2907
2908 /*******************************************************************
2909 * NtRaiseException (NTDLL.@)
2910 */
2911 NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
2912 {
2913 NTSTATUS status = raise_exception( rec, context, first_chance );
2914 if (status == STATUS_SUCCESS) NtSetContextThread( GetCurrentThread(), context );
2915 return status;
2916 }
2917
2918
2919 /***********************************************************************
2920 * RtlRaiseException (NTDLL.@)
2921 */
2922 void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
2923 {
2924 NTSTATUS status;
2925
2926 rec->ExceptionAddress = (void *)context->Rip;
2927 status = raise_exception( rec, context, TRUE );
2928 if (status != STATUS_SUCCESS) raise_status( status, rec );
2929 }
2930 DEFINE_REGS_ENTRYPOINT( RtlRaiseException, 1 )
2931
2932
2933 /*************************************************************************
2934 * RtlCaptureStackBackTrace (NTDLL.@)
2935 */
2936 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
2937 {
2938 FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash );
2939 return 0;
2940 }
2941
2942
2943 /***********************************************************************
2944 * call_thread_func
2945 */
2946 void call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg, void *frame )
2947 {
2948 ntdll_get_thread_data()->exit_frame = frame;
2949 __TRY
2950 {
2951 RtlExitUserThread( entry( arg ));
2952 }
2953 __EXCEPT(unhandled_exception_filter)
2954 {
2955 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
2956 }
2957 __ENDTRY
2958 abort(); /* should not be reached */
2959 }
2960
2961 extern void DECLSPEC_NORETURN call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg );
2962 __ASM_GLOBAL_FUNC( call_thread_entry_point,
2963 "subq $8,%rsp\n\t"
2964 ".cfi_adjust_cfa_offset 8\n\t"
2965 "movq %rsp,%rdx\n\t"
2966 "call " __ASM_NAME("call_thread_func") );
2967
2968 extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), void *frame );
2969 __ASM_GLOBAL_FUNC( call_thread_exit_func,
2970 "subq $8,%rsp\n\t"
2971 ".cfi_adjust_cfa_offset 8\n\t"
2972 "movq %rdx,%rsp\n\t"
2973 "call *%rsi" );
2974
2975 /***********************************************************************
2976 * RtlExitUserThread (NTDLL.@)
2977 */
2978 void WINAPI RtlExitUserThread( ULONG status )
2979 {
2980 if (!ntdll_get_thread_data()->exit_frame) exit_thread( status );
2981 call_thread_exit_func( status, exit_thread, ntdll_get_thread_data()->exit_frame );
2982 }
2983
2984 /***********************************************************************
2985 * abort_thread
2986 */
2987 void abort_thread( int status )
2988 {
2989 if (!ntdll_get_thread_data()->exit_frame) terminate_thread( status );
2990 call_thread_exit_func( status, terminate_thread, ntdll_get_thread_data()->exit_frame );
2991 }
2992
2993 /**********************************************************************
2994 * __wine_enter_vm86 (NTDLL.@)
2995 */
2996 void __wine_enter_vm86( CONTEXT *context )
2997 {
2998 MESSAGE("vm86 mode not supported on this platform\n");
2999 }
3000
3001 /**********************************************************************
3002 * DbgBreakPoint (NTDLL.@)
3003 */
3004 __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret")
3005
3006 /**********************************************************************
3007 * DbgUserBreakPoint (NTDLL.@)
3008 */
3009 __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret")
3010
3011 #endif /* __x86_64__ */
useful hacks and other patches not (yet) suitable for mainline