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ntdll: Restructure x86_64 exception processing to treat all functions with missing...
[wine.git] / dlls / ntdll / signal_x86_64.c
blob4900b434681daa911ebebc2401302a6505debf31
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 #ifdef HAVE_VALGRIND_MEMCHECK_H
54 #include <valgrind/memcheck.h>
55 #endif
56
57 WINE_DEFAULT_DEBUG_CHANNEL(seh);
58
59 struct _DISPATCHER_CONTEXT;
60
61 typedef LONG (WINAPI *PC_LANGUAGE_EXCEPTION_HANDLER)( EXCEPTION_POINTERS *ptrs, ULONG64 frame );
62 typedef EXCEPTION_DISPOSITION (WINAPI *PEXCEPTION_ROUTINE)( EXCEPTION_RECORD *rec,
63 ULONG64 frame,
64 CONTEXT *context,
65 struct _DISPATCHER_CONTEXT *dispatch );
66
67 typedef struct _DISPATCHER_CONTEXT
68 {
69 ULONG64 ControlPc;
70 ULONG64 ImageBase;
71 PRUNTIME_FUNCTION FunctionEntry;
72 ULONG64 EstablisherFrame;
73 ULONG64 TargetIp;
74 PCONTEXT ContextRecord;
75 PEXCEPTION_ROUTINE LanguageHandler;
76 PVOID HandlerData;
77 PUNWIND_HISTORY_TABLE HistoryTable;
78 ULONG ScopeIndex;
79 } DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT;
80
81 typedef struct _SCOPE_TABLE
82 {
83 ULONG Count;
84 struct
85 {
86 ULONG BeginAddress;
87 ULONG EndAddress;
88 ULONG HandlerAddress;
89 ULONG JumpTarget;
90 } ScopeRecord[1];
91 } SCOPE_TABLE, *PSCOPE_TABLE;
92
93
94 /***********************************************************************
95 * signal context platform-specific definitions
96 */
97 #ifdef linux
98
99 #include <asm/prctl.h>
100 extern int arch_prctl(int func, void *ptr);
101
102 #define RAX_sig(context) ((context)->uc_mcontext.gregs[REG_RAX])
103 #define RBX_sig(context) ((context)->uc_mcontext.gregs[REG_RBX])
104 #define RCX_sig(context) ((context)->uc_mcontext.gregs[REG_RCX])
105 #define RDX_sig(context) ((context)->uc_mcontext.gregs[REG_RDX])
106 #define RSI_sig(context) ((context)->uc_mcontext.gregs[REG_RSI])
107 #define RDI_sig(context) ((context)->uc_mcontext.gregs[REG_RDI])
108 #define RBP_sig(context) ((context)->uc_mcontext.gregs[REG_RBP])
109 #define R8_sig(context) ((context)->uc_mcontext.gregs[REG_R8])
110 #define R9_sig(context) ((context)->uc_mcontext.gregs[REG_R9])
111 #define R10_sig(context) ((context)->uc_mcontext.gregs[REG_R10])
112 #define R11_sig(context) ((context)->uc_mcontext.gregs[REG_R11])
113 #define R12_sig(context) ((context)->uc_mcontext.gregs[REG_R12])
114 #define R13_sig(context) ((context)->uc_mcontext.gregs[REG_R13])
115 #define R14_sig(context) ((context)->uc_mcontext.gregs[REG_R14])
116 #define R15_sig(context) ((context)->uc_mcontext.gregs[REG_R15])
117
118 #define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0))
119 #define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1))
120 #define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2))
121
122 #define RSP_sig(context) ((context)->uc_mcontext.gregs[REG_RSP])
123 #define RIP_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
124 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
125 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
126 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
127
128 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.fpregs))
129
130 #endif /* linux */
131
132 #if defined(__NetBSD__)
133 # include <sys/ucontext.h>
134 # include <sys/types.h>
135 # include <signal.h>
136
137 #define RAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RAX])
138 #define RBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBX])
139 #define RCX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RCX])
140 #define RDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDX])
141 #define RSI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RSI])
142 #define RDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDI])
143 #define RBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBP])
144 #define R8_sig(context) ((context)->uc_mcontext.__gregs[_REG_R8])
145 #define R9_sig(context) ((context)->uc_mcontext.__gregs[_REG_R9])
146 #define R10_sig(context) ((context)->uc_mcontext.__gregs[_REG_R10])
147 #define R11_sig(context) ((context)->uc_mcontext.__gregs[_REG_R11])
148 #define R12_sig(context) ((context)->uc_mcontext.__gregs[_REG_R12])
149 #define R13_sig(context) ((context)->uc_mcontext.__gregs[_REG_R13])
150 #define R14_sig(context) ((context)->uc_mcontext.__gregs[_REG_R14])
151 #define R15_sig(context) ((context)->uc_mcontext.__gregs[_REG_R15])
152
153 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
154 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
155 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
156 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
157 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
158 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
159
160 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_RFL])
161
162 #define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_RIP]))
163 #define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_URSP]))
164
165 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
166 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
167
168 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.__fpregs))
169 #endif /* __NetBSD__ */
170
171 enum i386_trap_code
172 {
173 TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
174 TRAP_x86_DIVIDE = 0, /* Division by zero exception */
175 TRAP_x86_TRCTRAP = 1, /* Single-step exception */
176 TRAP_x86_NMI = 2, /* NMI interrupt */
177 TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
178 TRAP_x86_OFLOW = 4, /* Overflow exception */
179 TRAP_x86_BOUND = 5, /* Bound range exception */
180 TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
181 TRAP_x86_DNA = 7, /* Device not available exception */
182 TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
183 TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
184 TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
185 TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
186 TRAP_x86_STKFLT = 12, /* Stack fault */
187 TRAP_x86_PROTFLT = 13, /* General protection fault */
188 TRAP_x86_PAGEFLT = 14, /* Page fault */
189 TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
190 TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
191 TRAP_x86_MCHK = 18, /* Machine check exception */
192 TRAP_x86_CACHEFLT = 19 /* Cache flush exception */
193 };
194
195 static const size_t teb_size = 0x2000; /* we reserve two pages for the TEB */
196 static size_t signal_stack_size;
197
198 typedef void (*raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
199 typedef int (*wine_signal_handler)(unsigned int sig);
200
201 static wine_signal_handler handlers[256];
202
203
204 /***********************************************************************
205 * Definitions for Win32 unwind tables
206 */
207
208 union handler_data
209 {
210 RUNTIME_FUNCTION chain;
211 ULONG handler;
212 };
213
214 struct opcode
215 {
216 BYTE offset;
217 BYTE code : 4;
218 BYTE info : 4;
219 };
220
221 struct UNWIND_INFO
222 {
223 BYTE version : 3;
224 BYTE flags : 5;
225 BYTE prolog;
226 BYTE count;
227 BYTE frame_reg : 4;
228 BYTE frame_offset : 4;
229 struct opcode opcodes[1]; /* info->count entries */
230 /* followed by handler_data */
231 };
232
233 #define UWOP_PUSH_NONVOL 0
234 #define UWOP_ALLOC_LARGE 1
235 #define UWOP_ALLOC_SMALL 2
236 #define UWOP_SET_FPREG 3
237 #define UWOP_SAVE_NONVOL 4
238 #define UWOP_SAVE_NONVOL_FAR 5
239 #define UWOP_SAVE_XMM128 8
240 #define UWOP_SAVE_XMM128_FAR 9
241 #define UWOP_PUSH_MACHFRAME 10
242
243 static void dump_unwind_info( ULONG64 base, RUNTIME_FUNCTION *function )
244 {
245 static const char * const reg_names[16] =
246 { "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
247 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" };
248
249 union handler_data *handler_data;
250 struct UNWIND_INFO *info;
251 unsigned int i, count;
252
253 TRACE( "**** func %x-%x\n", function->BeginAddress, function->EndAddress );
254 for (;;)
255 {
256 if (function->UnwindData & 1)
257 {
258 RUNTIME_FUNCTION *next = (RUNTIME_FUNCTION *)((char *)base + (function->UnwindData & ~1));
259 TRACE( "unwind info for function %p-%p chained to function %p-%p\n",
260 (char *)base + function->BeginAddress, (char *)base + function->EndAddress,
261 (char *)base + next->BeginAddress, (char *)base + next->EndAddress );
262 function = next;
263 continue;
264 }
265 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
266
267 TRACE( "unwind info at %p flags %x prolog 0x%x bytes function %p-%p\n",
268 info, info->flags, info->prolog,
269 (char *)base + function->BeginAddress, (char *)base + function->EndAddress );
270
271 if (info->frame_reg)
272 TRACE( " frame register %s offset 0x%x(%%rsp)\n",
273 reg_names[info->frame_reg], info->frame_offset * 16 );
274
275 for (i = 0; i < info->count; i++)
276 {
277 TRACE( " 0x%x: ", info->opcodes[i].offset );
278 switch (info->opcodes[i].code)
279 {
280 case UWOP_PUSH_NONVOL:
281 TRACE( "pushq %%%s\n", reg_names[info->opcodes[i].info] );
282 break;
283 case UWOP_ALLOC_LARGE:
284 if (info->opcodes[i].info)
285 {
286 count = *(DWORD *)&info->opcodes[i+1];
287 i += 2;
288 }
289 else
290 {
291 count = *(USHORT *)&info->opcodes[i+1] * 8;
292 i++;
293 }
294 TRACE( "subq $0x%x,%%rsp\n", count );
295 break;
296 case UWOP_ALLOC_SMALL:
297 count = (info->opcodes[i].info + 1) * 8;
298 TRACE( "subq $0x%x,%%rsp\n", count );
299 break;
300 case UWOP_SET_FPREG:
301 TRACE( "leaq 0x%x(%%rsp),%s\n",
302 info->frame_offset * 16, reg_names[info->frame_reg] );
303 break;
304 case UWOP_SAVE_NONVOL:
305 count = *(USHORT *)&info->opcodes[i+1] * 8;
306 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
307 i++;
308 break;
309 case UWOP_SAVE_NONVOL_FAR:
310 count = *(DWORD *)&info->opcodes[i+1];
311 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
312 i += 2;
313 break;
314 case UWOP_SAVE_XMM128:
315 count = *(USHORT *)&info->opcodes[i+1] * 16;
316 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
317 i++;
318 break;
319 case UWOP_SAVE_XMM128_FAR:
320 count = *(DWORD *)&info->opcodes[i+1];
321 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
322 i += 2;
323 break;
324 case UWOP_PUSH_MACHFRAME:
325 TRACE( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
326 break;
327 default:
328 FIXME( "unknown code %u\n", info->opcodes[i].code );
329 break;
330 }
331 }
332
333 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
334 if (info->flags & UNW_FLAG_CHAININFO)
335 {
336 TRACE( " chained to function %p-%p\n",
337 (char *)base + handler_data->chain.BeginAddress,
338 (char *)base + handler_data->chain.EndAddress );
339 function = &handler_data->chain;
340 continue;
341 }
342 if (info->flags & (UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER))
343 TRACE( " handler %p data at %p\n",
344 (char *)base + handler_data->handler, &handler_data->handler + 1 );
345 break;
346 }
347 }
348
349 static void dump_scope_table( ULONG64 base, const SCOPE_TABLE *table )
350 {
351 unsigned int i;
352
353 TRACE( "scope table at %p\n", table );
354 for (i = 0; i < table->Count; i++)
355 TRACE( " %u: %lx-%lx handler %lx target %lx\n", i,
356 base + table->ScopeRecord[i].BeginAddress,
357 base + table->ScopeRecord[i].EndAddress,
358 base + table->ScopeRecord[i].HandlerAddress,
359 base + table->ScopeRecord[i].JumpTarget );
360 }
361
362
363 /***********************************************************************
364 * Definitions for Dwarf unwind tables
365 */
366
367 enum dwarf_call_frame_info
368 {
369 DW_CFA_advance_loc = 0x40,
370 DW_CFA_offset = 0x80,
371 DW_CFA_restore = 0xc0,
372 DW_CFA_nop = 0x00,
373 DW_CFA_set_loc = 0x01,
374 DW_CFA_advance_loc1 = 0x02,
375 DW_CFA_advance_loc2 = 0x03,
376 DW_CFA_advance_loc4 = 0x04,
377 DW_CFA_offset_extended = 0x05,
378 DW_CFA_restore_extended = 0x06,
379 DW_CFA_undefined = 0x07,
380 DW_CFA_same_value = 0x08,
381 DW_CFA_register = 0x09,
382 DW_CFA_remember_state = 0x0a,
383 DW_CFA_restore_state = 0x0b,
384 DW_CFA_def_cfa = 0x0c,
385 DW_CFA_def_cfa_register = 0x0d,
386 DW_CFA_def_cfa_offset = 0x0e,
387 DW_CFA_def_cfa_expression = 0x0f,
388 DW_CFA_expression = 0x10,
389 DW_CFA_offset_extended_sf = 0x11,
390 DW_CFA_def_cfa_sf = 0x12,
391 DW_CFA_def_cfa_offset_sf = 0x13,
392 DW_CFA_val_offset = 0x14,
393 DW_CFA_val_offset_sf = 0x15,
394 DW_CFA_val_expression = 0x16,
395 };
396
397 enum dwarf_operation
398 {
399 DW_OP_addr = 0x03,
400 DW_OP_deref = 0x06,
401 DW_OP_const1u = 0x08,
402 DW_OP_const1s = 0x09,
403 DW_OP_const2u = 0x0a,
404 DW_OP_const2s = 0x0b,
405 DW_OP_const4u = 0x0c,
406 DW_OP_const4s = 0x0d,
407 DW_OP_const8u = 0x0e,
408 DW_OP_const8s = 0x0f,
409 DW_OP_constu = 0x10,
410 DW_OP_consts = 0x11,
411 DW_OP_dup = 0x12,
412 DW_OP_drop = 0x13,
413 DW_OP_over = 0x14,
414 DW_OP_pick = 0x15,
415 DW_OP_swap = 0x16,
416 DW_OP_rot = 0x17,
417 DW_OP_xderef = 0x18,
418 DW_OP_abs = 0x19,
419 DW_OP_and = 0x1a,
420 DW_OP_div = 0x1b,
421 DW_OP_minus = 0x1c,
422 DW_OP_mod = 0x1d,
423 DW_OP_mul = 0x1e,
424 DW_OP_neg = 0x1f,
425 DW_OP_not = 0x20,
426 DW_OP_or = 0x21,
427 DW_OP_plus = 0x22,
428 DW_OP_plus_uconst = 0x23,
429 DW_OP_shl = 0x24,
430 DW_OP_shr = 0x25,
431 DW_OP_shra = 0x26,
432 DW_OP_xor = 0x27,
433 DW_OP_bra = 0x28,
434 DW_OP_eq = 0x29,
435 DW_OP_ge = 0x2a,
436 DW_OP_gt = 0x2b,
437 DW_OP_le = 0x2c,
438 DW_OP_lt = 0x2d,
439 DW_OP_ne = 0x2e,
440 DW_OP_skip = 0x2f,
441 DW_OP_lit0 = 0x30,
442 DW_OP_lit1 = 0x31,
443 DW_OP_lit2 = 0x32,
444 DW_OP_lit3 = 0x33,
445 DW_OP_lit4 = 0x34,
446 DW_OP_lit5 = 0x35,
447 DW_OP_lit6 = 0x36,
448 DW_OP_lit7 = 0x37,
449 DW_OP_lit8 = 0x38,
450 DW_OP_lit9 = 0x39,
451 DW_OP_lit10 = 0x3a,
452 DW_OP_lit11 = 0x3b,
453 DW_OP_lit12 = 0x3c,
454 DW_OP_lit13 = 0x3d,
455 DW_OP_lit14 = 0x3e,
456 DW_OP_lit15 = 0x3f,
457 DW_OP_lit16 = 0x40,
458 DW_OP_lit17 = 0x41,
459 DW_OP_lit18 = 0x42,
460 DW_OP_lit19 = 0x43,
461 DW_OP_lit20 = 0x44,
462 DW_OP_lit21 = 0x45,
463 DW_OP_lit22 = 0x46,
464 DW_OP_lit23 = 0x47,
465 DW_OP_lit24 = 0x48,
466 DW_OP_lit25 = 0x49,
467 DW_OP_lit26 = 0x4a,
468 DW_OP_lit27 = 0x4b,
469 DW_OP_lit28 = 0x4c,
470 DW_OP_lit29 = 0x4d,
471 DW_OP_lit30 = 0x4e,
472 DW_OP_lit31 = 0x4f,
473 DW_OP_reg0 = 0x50,
474 DW_OP_reg1 = 0x51,
475 DW_OP_reg2 = 0x52,
476 DW_OP_reg3 = 0x53,
477 DW_OP_reg4 = 0x54,
478 DW_OP_reg5 = 0x55,
479 DW_OP_reg6 = 0x56,
480 DW_OP_reg7 = 0x57,
481 DW_OP_reg8 = 0x58,
482 DW_OP_reg9 = 0x59,
483 DW_OP_reg10 = 0x5a,
484 DW_OP_reg11 = 0x5b,
485 DW_OP_reg12 = 0x5c,
486 DW_OP_reg13 = 0x5d,
487 DW_OP_reg14 = 0x5e,
488 DW_OP_reg15 = 0x5f,
489 DW_OP_reg16 = 0x60,
490 DW_OP_reg17 = 0x61,
491 DW_OP_reg18 = 0x62,
492 DW_OP_reg19 = 0x63,
493 DW_OP_reg20 = 0x64,
494 DW_OP_reg21 = 0x65,
495 DW_OP_reg22 = 0x66,
496 DW_OP_reg23 = 0x67,
497 DW_OP_reg24 = 0x68,
498 DW_OP_reg25 = 0x69,
499 DW_OP_reg26 = 0x6a,
500 DW_OP_reg27 = 0x6b,
501 DW_OP_reg28 = 0x6c,
502 DW_OP_reg29 = 0x6d,
503 DW_OP_reg30 = 0x6e,
504 DW_OP_reg31 = 0x6f,
505 DW_OP_breg0 = 0x70,
506 DW_OP_breg1 = 0x71,
507 DW_OP_breg2 = 0x72,
508 DW_OP_breg3 = 0x73,
509 DW_OP_breg4 = 0x74,
510 DW_OP_breg5 = 0x75,
511 DW_OP_breg6 = 0x76,
512 DW_OP_breg7 = 0x77,
513 DW_OP_breg8 = 0x78,
514 DW_OP_breg9 = 0x79,
515 DW_OP_breg10 = 0x7a,
516 DW_OP_breg11 = 0x7b,
517 DW_OP_breg12 = 0x7c,
518 DW_OP_breg13 = 0x7d,
519 DW_OP_breg14 = 0x7e,
520 DW_OP_breg15 = 0x7f,
521 DW_OP_breg16 = 0x80,
522 DW_OP_breg17 = 0x81,
523 DW_OP_breg18 = 0x82,
524 DW_OP_breg19 = 0x83,
525 DW_OP_breg20 = 0x84,
526 DW_OP_breg21 = 0x85,
527 DW_OP_breg22 = 0x86,
528 DW_OP_breg23 = 0x87,
529 DW_OP_breg24 = 0x88,
530 DW_OP_breg25 = 0x89,
531 DW_OP_breg26 = 0x8a,
532 DW_OP_breg27 = 0x8b,
533 DW_OP_breg28 = 0x8c,
534 DW_OP_breg29 = 0x8d,
535 DW_OP_breg30 = 0x8e,
536 DW_OP_breg31 = 0x8f,
537 DW_OP_regx = 0x90,
538 DW_OP_fbreg = 0x91,
539 DW_OP_bregx = 0x92,
540 DW_OP_piece = 0x93,
541 DW_OP_deref_size = 0x94,
542 DW_OP_xderef_size = 0x95,
543 DW_OP_nop = 0x96,
544 DW_OP_push_object_address = 0x97,
545 DW_OP_call2 = 0x98,
546 DW_OP_call4 = 0x99,
547 DW_OP_call_ref = 0x9a,
548 DW_OP_form_tls_address = 0x9b,
549 DW_OP_call_frame_cfa = 0x9c,
550 DW_OP_bit_piece = 0x9d,
551 DW_OP_lo_user = 0xe0,
552 DW_OP_hi_user = 0xff,
553 DW_OP_GNU_push_tls_address = 0xe0,
554 DW_OP_GNU_uninit = 0xf0,
555 DW_OP_GNU_encoded_addr = 0xf1,
556 };
557
558 #define DW_EH_PE_native 0x00
559 #define DW_EH_PE_leb128 0x01
560 #define DW_EH_PE_data2 0x02
561 #define DW_EH_PE_data4 0x03
562 #define DW_EH_PE_data8 0x04
563 #define DW_EH_PE_signed 0x08
564 #define DW_EH_PE_abs 0x00
565 #define DW_EH_PE_pcrel 0x10
566 #define DW_EH_PE_textrel 0x20
567 #define DW_EH_PE_datarel 0x30
568 #define DW_EH_PE_funcrel 0x40
569 #define DW_EH_PE_aligned 0x50
570 #define DW_EH_PE_indirect 0x80
571 #define DW_EH_PE_omit 0xff
572
573 struct dwarf_eh_bases
574 {
575 void *tbase;
576 void *dbase;
577 void *func;
578 };
579
580 struct dwarf_cie
581 {
582 unsigned int length;
583 int id;
584 unsigned char version;
585 unsigned char augmentation[1];
586 };
587
588 struct dwarf_fde
589 {
590 unsigned int length;
591 unsigned int cie_offset;
592 };
593
594 extern const struct dwarf_fde *_Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
595
596 static unsigned char dwarf_get_u1( const unsigned char **p )
597 {
598 return *(*p)++;
599 }
600
601 static unsigned short dwarf_get_u2( const unsigned char **p )
602 {
603 unsigned int ret = (*p)[0] | ((*p)[1] << 8);
604 (*p) += 2;
605 return ret;
606 }
607
608 static unsigned int dwarf_get_u4( const unsigned char **p )
609 {
610 unsigned int ret = (*p)[0] | ((*p)[1] << 8) | ((*p)[2] << 16) | ((*p)[3] << 24);
611 (*p) += 4;
612 return ret;
613 }
614
615 static ULONG64 dwarf_get_u8( const unsigned char **p )
616 {
617 ULONG64 low = dwarf_get_u4( p );
618 ULONG64 high = dwarf_get_u4( p );
619 return low | (high << 32);
620 }
621
622 static ULONG_PTR dwarf_get_uleb128( const unsigned char **p )
623 {
624 ULONG_PTR ret = 0;
625 unsigned int shift = 0;
626 unsigned char byte;
627
628 do
629 {
630 byte = **p;
631 ret |= (ULONG_PTR)(byte & 0x7f) << shift;
632 shift += 7;
633 (*p)++;
634 } while (byte & 0x80);
635 return ret;
636 }
637
638 static LONG_PTR dwarf_get_sleb128( const unsigned char **p )
639 {
640 ULONG_PTR ret = 0;
641 unsigned int shift = 0;
642 unsigned char byte;
643
644 do
645 {
646 byte = **p;
647 ret |= (ULONG_PTR)(byte & 0x7f) << shift;
648 shift += 7;
649 (*p)++;
650 } while (byte & 0x80);
651
652 if ((shift < 8 * sizeof(ret)) && (byte & 0x40)) ret |= -((ULONG_PTR)1 << shift);
653 return ret;
654 }
655
656 static ULONG_PTR dwarf_get_ptr( const unsigned char **p, unsigned char encoding )
657 {
658 ULONG_PTR base;
659
660 if (encoding == DW_EH_PE_omit) return 0;
661
662 switch (encoding & 0xf0)
663 {
664 case DW_EH_PE_abs:
665 base = 0;
666 break;
667 case DW_EH_PE_pcrel:
668 base = (ULONG_PTR)*p;
669 break;
670 default:
671 FIXME( "unsupported encoding %02x\n", encoding );
672 return 0;
673 }
674
675 switch (encoding & 0x0f)
676 {
677 case DW_EH_PE_native:
678 return base + dwarf_get_u8( p );
679 case DW_EH_PE_leb128:
680 return base + dwarf_get_uleb128( p );
681 case DW_EH_PE_data2:
682 return base + dwarf_get_u2( p );
683 case DW_EH_PE_data4:
684 return base + dwarf_get_u4( p );
685 case DW_EH_PE_data8:
686 return base + dwarf_get_u8( p );
687 case DW_EH_PE_signed|DW_EH_PE_leb128:
688 return base + dwarf_get_sleb128( p );
689 case DW_EH_PE_signed|DW_EH_PE_data2:
690 return base + (signed short)dwarf_get_u2( p );
691 case DW_EH_PE_signed|DW_EH_PE_data4:
692 return base + (signed int)dwarf_get_u4( p );
693 case DW_EH_PE_signed|DW_EH_PE_data8:
694 return base + (LONG64)dwarf_get_u8( p );
695 default:
696 FIXME( "unsupported encoding %02x\n", encoding );
697 return 0;
698 }
699 }
700
701 enum reg_rule
702 {
703 RULE_UNSET, /* not set at all */
704 RULE_UNDEFINED, /* undefined value */
705 RULE_SAME, /* same value as previous frame */
706 RULE_CFA_OFFSET, /* stored at cfa offset */
707 RULE_OTHER_REG, /* stored in other register */
708 RULE_EXPRESSION, /* address specified by expression */
709 RULE_VAL_EXPRESSION /* value specified by expression */
710 };
711
712 #define NB_FRAME_REGS 41
713
714 struct frame_info
715 {
716 ULONG_PTR ip;
717 ULONG_PTR code_align;
718 LONG_PTR data_align;
719 ULONG_PTR cfa_offset;
720 enum reg_rule cfa_rule;
721 unsigned char cfa_reg;
722 unsigned char retaddr_reg;
723 unsigned char fde_encoding;
724 unsigned char signal_frame;
725 enum reg_rule rules[NB_FRAME_REGS];
726 ULONG64 regs[NB_FRAME_REGS];
727 };
728
729 static const char *dwarf_reg_names[NB_FRAME_REGS] =
730 {
731 /* 0-7 */ "%rax", "%rdx", "%rcx", "%rbx", "%rsi", "%rdi", "%rbp", "%rsp",
732 /* 8-16 */ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%rip",
733 /* 17-24 */ "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7",
734 /* 25-32 */ "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15",
735 /* 33-40 */ "%st0", "%st1", "%st2", "%st3", "%st4", "%st5", "%st6", "%st7"
736 };
737
738 static int valid_reg( ULONG_PTR reg )
739 {
740 if (reg >= NB_FRAME_REGS) FIXME( "unsupported reg %lx\n", reg );
741 return (reg < NB_FRAME_REGS);
742 }
743
744 static void execute_cfa_instructions( const unsigned char *ptr, const unsigned char *end,
745 ULONG_PTR last_ip, struct frame_info *info )
746 {
747 while (ptr < end && info->ip < last_ip + info->signal_frame)
748 {
749 enum dwarf_call_frame_info op = *ptr++;
750
751 if (op & 0xc0)
752 {
753 switch (op & 0xc0)
754 {
755 case DW_CFA_advance_loc:
756 {
757 ULONG_PTR offset = (op & 0x3f) * info->code_align;
758 TRACE( "%lx: DW_CFA_advance_loc %lu\n", info->ip, offset );
759 info->ip += offset;
760 break;
761 }
762 case DW_CFA_offset:
763 {
764 ULONG_PTR reg = op & 0x3f;
765 LONG_PTR offset = dwarf_get_uleb128( &ptr ) * info->data_align;
766 if (!valid_reg( reg )) break;
767 TRACE( "%lx: DW_CFA_offset %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
768 info->regs[reg] = offset;
769 info->rules[reg] = RULE_CFA_OFFSET;
770 break;
771 }
772 case DW_CFA_restore:
773 {
774 ULONG_PTR reg = op & 0x3f;
775 if (!valid_reg( reg )) break;
776 TRACE( "%lx: DW_CFA_restore %s\n", info->ip, dwarf_reg_names[reg] );
777 info->rules[reg] = RULE_UNSET;
778 break;
779 }
780 }
781 }
782 else switch (op)
783 {
784 case DW_CFA_nop:
785 break;
786 case DW_CFA_set_loc:
787 {
788 ULONG_PTR loc = dwarf_get_ptr( &ptr, info->fde_encoding );
789 TRACE( "%lx: DW_CFA_set_loc %lx\n", info->ip, loc );
790 info->ip = loc;
791 break;
792 }
793 case DW_CFA_advance_loc1:
794 {
795 ULONG_PTR offset = *ptr++ * info->code_align;
796 TRACE( "%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset );
797 info->ip += offset;
798 break;
799 }
800 case DW_CFA_advance_loc2:
801 {
802 ULONG_PTR offset = dwarf_get_u2( &ptr ) * info->code_align;
803 TRACE( "%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset );
804 info->ip += offset;
805 break;
806 }
807 case DW_CFA_advance_loc4:
808 {
809 ULONG_PTR offset = dwarf_get_u4( &ptr ) * info->code_align;
810 TRACE( "%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset );
811 info->ip += offset;
812 break;
813 }
814 case DW_CFA_offset_extended:
815 case DW_CFA_offset_extended_sf:
816 {
817 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
818 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf_get_uleb128( &ptr ) * info->data_align
819 : dwarf_get_sleb128( &ptr ) * info->data_align;
820 if (!valid_reg( reg )) break;
821 TRACE( "%lx: DW_CFA_offset_extended %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
822 info->regs[reg] = offset;
823 info->rules[reg] = RULE_CFA_OFFSET;
824 break;
825 }
826 case DW_CFA_restore_extended:
827 {
828 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
829 if (!valid_reg( reg )) break;
830 TRACE( "%lx: DW_CFA_restore_extended %s\n", info->ip, dwarf_reg_names[reg] );
831 info->rules[reg] = RULE_UNSET;
832 break;
833 }
834 case DW_CFA_undefined:
835 {
836 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
837 if (!valid_reg( reg )) break;
838 TRACE( "%lx: DW_CFA_undefined %s\n", info->ip, dwarf_reg_names[reg] );
839 info->rules[reg] = RULE_UNDEFINED;
840 break;
841 }
842 case DW_CFA_same_value:
843 {
844 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
845 if (!valid_reg( reg )) break;
846 TRACE( "%lx: DW_CFA_same_value %s\n", info->ip, dwarf_reg_names[reg] );
847 info->regs[reg] = reg;
848 info->rules[reg] = RULE_SAME;
849 break;
850 }
851 case DW_CFA_register:
852 {
853 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
854 ULONG_PTR reg2 = dwarf_get_uleb128( &ptr );
855 if (!valid_reg( reg ) || !valid_reg( reg2 )) break;
856 TRACE( "%lx: DW_CFA_register %s == %s\n", info->ip, dwarf_reg_names[reg], dwarf_reg_names[reg2] );
857 info->regs[reg] = reg2;
858 info->rules[reg] = RULE_OTHER_REG;
859 break;
860 }
861 case DW_CFA_remember_state:
862 FIXME( "%lx: DW_CFA_remember_state not implemented\n", info->ip );
863 break;
864 case DW_CFA_restore_state:
865 FIXME( "%lx: DW_CFA_restore_state not implemented\n", info->ip );
866 break;
867 case DW_CFA_def_cfa:
868 case DW_CFA_def_cfa_sf:
869 {
870 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
871 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf_get_uleb128( &ptr )
872 : dwarf_get_sleb128( &ptr ) * info->data_align;
873 if (!valid_reg( reg )) break;
874 TRACE( "%lx: DW_CFA_def_cfa %s, %lu\n", info->ip, dwarf_reg_names[reg], offset );
875 info->cfa_reg = reg;
876 info->cfa_offset = offset;
877 info->cfa_rule = RULE_CFA_OFFSET;
878 break;
879 }
880 case DW_CFA_def_cfa_register:
881 {
882 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
883 if (!valid_reg( reg )) break;
884 TRACE( "%lx: DW_CFA_def_cfa_register %s\n", info->ip, dwarf_reg_names[reg] );
885 info->cfa_reg = reg;
886 info->cfa_rule = RULE_CFA_OFFSET;
887 break;
888 }
889 case DW_CFA_def_cfa_offset:
890 case DW_CFA_def_cfa_offset_sf:
891 {
892 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf_get_uleb128( &ptr )
893 : dwarf_get_sleb128( &ptr ) * info->data_align;
894 TRACE( "%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset );
895 info->cfa_offset = offset;
896 info->cfa_rule = RULE_CFA_OFFSET;
897 break;
898 }
899 case DW_CFA_def_cfa_expression:
900 {
901 ULONG_PTR expr = (ULONG_PTR)ptr;
902 ULONG_PTR len = dwarf_get_uleb128( &ptr );
903 TRACE( "%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len );
904 info->cfa_offset = expr;
905 info->cfa_rule = RULE_VAL_EXPRESSION;
906 ptr += len;
907 break;
908 }
909 case DW_CFA_expression:
910 case DW_CFA_val_expression:
911 {
912 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
913 ULONG_PTR expr = (ULONG_PTR)ptr;
914 ULONG_PTR len = dwarf_get_uleb128( &ptr );
915 if (!valid_reg( reg )) break;
916 TRACE( "%lx: DW_CFA_%sexpression %s %lx-%lx\n",
917 info->ip, (op == DW_CFA_expression) ? "" : "val_", dwarf_reg_names[reg], expr, expr+len );
918 info->regs[reg] = expr;
919 info->rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
920 ptr += len;
921 break;
922 }
923 default:
924 FIXME( "%lx: unknown CFA opcode %02x\n", info->ip, op );
925 break;
926 }
927 }
928 }
929
930 /* retrieve a context register from its dwarf number */
931 static void *get_context_reg( CONTEXT *context, ULONG_PTR dw_reg )
932 {
933 switch (dw_reg)
934 {
935 case 0: return &context->Rax;
936 case 1: return &context->Rdx;
937 case 2: return &context->Rcx;
938 case 3: return &context->Rbx;
939 case 4: return &context->Rsi;
940 case 5: return &context->Rdi;
941 case 6: return &context->Rbp;
942 case 7: return &context->Rsp;
943 case 8: return &context->R8;
944 case 9: return &context->R9;
945 case 10: return &context->R10;
946 case 11: return &context->R11;
947 case 12: return &context->R12;
948 case 13: return &context->R13;
949 case 14: return &context->R14;
950 case 15: return &context->R15;
951 case 16: return &context->Rip;
952 case 17: return &context->u.s.Xmm0;
953 case 18: return &context->u.s.Xmm1;
954 case 19: return &context->u.s.Xmm2;
955 case 20: return &context->u.s.Xmm3;
956 case 21: return &context->u.s.Xmm4;
957 case 22: return &context->u.s.Xmm5;
958 case 23: return &context->u.s.Xmm6;
959 case 24: return &context->u.s.Xmm7;
960 case 25: return &context->u.s.Xmm8;
961 case 26: return &context->u.s.Xmm9;
962 case 27: return &context->u.s.Xmm10;
963 case 28: return &context->u.s.Xmm11;
964 case 29: return &context->u.s.Xmm12;
965 case 30: return &context->u.s.Xmm13;
966 case 31: return &context->u.s.Xmm14;
967 case 32: return &context->u.s.Xmm15;
968 case 33: return &context->u.s.Legacy[0];
969 case 34: return &context->u.s.Legacy[1];
970 case 35: return &context->u.s.Legacy[2];
971 case 36: return &context->u.s.Legacy[3];
972 case 37: return &context->u.s.Legacy[4];
973 case 38: return &context->u.s.Legacy[5];
974 case 39: return &context->u.s.Legacy[6];
975 case 40: return &context->u.s.Legacy[7];
976 default: return NULL;
977 }
978 }
979
980 /* set a context register from its dwarf number */
981 static void set_context_reg( CONTEXT *context, ULONG_PTR dw_reg, void *val )
982 {
983 switch (dw_reg)
984 {
985 case 0: context->Rax = *(ULONG64 *)val; break;
986 case 1: context->Rdx = *(ULONG64 *)val; break;
987 case 2: context->Rcx = *(ULONG64 *)val; break;
988 case 3: context->Rbx = *(ULONG64 *)val; break;
989 case 4: context->Rsi = *(ULONG64 *)val; break;
990 case 5: context->Rdi = *(ULONG64 *)val; break;
991 case 6: context->Rbp = *(ULONG64 *)val; break;
992 case 7: context->Rsp = *(ULONG64 *)val; break;
993 case 8: context->R8 = *(ULONG64 *)val; break;
994 case 9: context->R9 = *(ULONG64 *)val; break;
995 case 10: context->R10 = *(ULONG64 *)val; break;
996 case 11: context->R11 = *(ULONG64 *)val; break;
997 case 12: context->R12 = *(ULONG64 *)val; break;
998 case 13: context->R13 = *(ULONG64 *)val; break;
999 case 14: context->R14 = *(ULONG64 *)val; break;
1000 case 15: context->R15 = *(ULONG64 *)val; break;
1001 case 16: context->Rip = *(ULONG64 *)val; break;
1002 case 17: context->u.s.Xmm0 = *(M128A *)val; break;
1003 case 18: context->u.s.Xmm1 = *(M128A *)val; break;
1004 case 19: context->u.s.Xmm2 = *(M128A *)val; break;
1005 case 20: context->u.s.Xmm3 = *(M128A *)val; break;
1006 case 21: context->u.s.Xmm4 = *(M128A *)val; break;
1007 case 22: context->u.s.Xmm5 = *(M128A *)val; break;
1008 case 23: context->u.s.Xmm6 = *(M128A *)val; break;
1009 case 24: context->u.s.Xmm7 = *(M128A *)val; break;
1010 case 25: context->u.s.Xmm8 = *(M128A *)val; break;
1011 case 26: context->u.s.Xmm9 = *(M128A *)val; break;
1012 case 27: context->u.s.Xmm10 = *(M128A *)val; break;
1013 case 28: context->u.s.Xmm11 = *(M128A *)val; break;
1014 case 29: context->u.s.Xmm12 = *(M128A *)val; break;
1015 case 30: context->u.s.Xmm13 = *(M128A *)val; break;
1016 case 31: context->u.s.Xmm14 = *(M128A *)val; break;
1017 case 32: context->u.s.Xmm15 = *(M128A *)val; break;
1018 case 33: context->u.s.Legacy[0] = *(M128A *)val; break;
1019 case 34: context->u.s.Legacy[1] = *(M128A *)val; break;
1020 case 35: context->u.s.Legacy[2] = *(M128A *)val; break;
1021 case 36: context->u.s.Legacy[3] = *(M128A *)val; break;
1022 case 37: context->u.s.Legacy[4] = *(M128A *)val; break;
1023 case 38: context->u.s.Legacy[5] = *(M128A *)val; break;
1024 case 39: context->u.s.Legacy[6] = *(M128A *)val; break;
1025 case 40: context->u.s.Legacy[7] = *(M128A *)val; break;
1026 }
1027 }
1028
1029 static ULONG_PTR eval_expression( const unsigned char *p, CONTEXT *context )
1030 {
1031 ULONG_PTR reg, tmp, stack[64];
1032 int sp = -1;
1033 ULONG_PTR len = dwarf_get_uleb128(&p);
1034 const unsigned char *end = p + len;
1035
1036 while (p < end)
1037 {
1038 unsigned char opcode = dwarf_get_u1(&p);
1039
1040 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
1041 stack[++sp] = opcode - DW_OP_lit0;
1042 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
1043 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_reg0 );
1044 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
1045 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_breg0 ) + dwarf_get_sleb128(&p);
1046 else switch (opcode)
1047 {
1048 case DW_OP_nop: break;
1049 case DW_OP_addr: stack[++sp] = dwarf_get_u8(&p); break;
1050 case DW_OP_const1u: stack[++sp] = dwarf_get_u1(&p); break;
1051 case DW_OP_const1s: stack[++sp] = (signed char)dwarf_get_u1(&p); break;
1052 case DW_OP_const2u: stack[++sp] = dwarf_get_u2(&p); break;
1053 case DW_OP_const2s: stack[++sp] = (short)dwarf_get_u2(&p); break;
1054 case DW_OP_const4u: stack[++sp] = dwarf_get_u4(&p); break;
1055 case DW_OP_const4s: stack[++sp] = (signed int)dwarf_get_u4(&p); break;
1056 case DW_OP_const8u: stack[++sp] = dwarf_get_u8(&p); break;
1057 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf_get_u8(&p); break;
1058 case DW_OP_constu: stack[++sp] = dwarf_get_uleb128(&p); break;
1059 case DW_OP_consts: stack[++sp] = dwarf_get_sleb128(&p); break;
1060 case DW_OP_deref: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
1061 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
1062 case DW_OP_drop: sp--; break;
1063 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
1064 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf_get_u1(&p)]; sp++; break;
1065 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
1066 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
1067 case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
1068 case DW_OP_neg: stack[sp] = -stack[sp]; break;
1069 case DW_OP_not: stack[sp] = ~stack[sp]; break;
1070 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
1071 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
1072 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
1073 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
1074 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
1075 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
1076 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
1077 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
1078 case DW_OP_plus_uconst: stack[sp] += dwarf_get_uleb128(&p); break;
1079 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
1080 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
1081 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
1082 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
1083 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
1084 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
1085 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
1086 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
1087 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
1088 case DW_OP_skip: tmp = (short)dwarf_get_u2(&p); p += tmp; break;
1089 case DW_OP_bra: tmp = (short)dwarf_get_u2(&p); if (!stack[sp--]) p += tmp; break;
1090 case DW_OP_GNU_encoded_addr: tmp = *p++; stack[++sp] = dwarf_get_ptr( &p, tmp ); break;
1091 case DW_OP_regx: stack[++sp] = *(ULONG_PTR *)get_context_reg( context, dwarf_get_uleb128(&p) ); break;
1092 case DW_OP_bregx:
1093 reg = dwarf_get_uleb128(&p);
1094 tmp = dwarf_get_sleb128(&p);
1095 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, reg ) + tmp;
1096 break;
1097 case DW_OP_deref_size:
1098 switch (*p++)
1099 {
1100 case 1: stack[sp] = *(unsigned char *)stack[sp]; break;
1101 case 2: stack[sp] = *(unsigned short *)stack[sp]; break;
1102 case 4: stack[sp] = *(unsigned int *)stack[sp]; break;
1103 case 8: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
1104 }
1105 break;
1106 default:
1107 FIXME( "unhandled opcode %02x\n", opcode );
1108 }
1109 }
1110 return stack[sp];
1111 }
1112
1113 /* apply the computed frame info to the actual context */
1114 static void apply_frame_info( CONTEXT *context, struct frame_info *info )
1115 {
1116 unsigned int i;
1117 ULONG_PTR cfa, value;
1118 CONTEXT new_context = *context;
1119
1120 switch (info->cfa_rule)
1121 {
1122 case RULE_EXPRESSION:
1123 cfa = *(ULONG_PTR *)eval_expression( (const unsigned char *)info->cfa_offset, context );
1124 break;
1125 case RULE_VAL_EXPRESSION:
1126 cfa = eval_expression( (const unsigned char *)info->cfa_offset, context );
1127 break;
1128 default:
1129 cfa = *(ULONG_PTR *)get_context_reg( context, info->cfa_reg ) + info->cfa_offset;
1130 break;
1131 }
1132 if (!cfa) return;
1133
1134 for (i = 0; i < NB_FRAME_REGS; i++)
1135 {
1136 switch (info->rules[i])
1137 {
1138 case RULE_UNSET:
1139 case RULE_UNDEFINED:
1140 case RULE_SAME:
1141 break;
1142 case RULE_CFA_OFFSET:
1143 set_context_reg( &new_context, i, (char *)cfa + info->regs[i] );
1144 break;
1145 case RULE_OTHER_REG:
1146 set_context_reg( &new_context, i, get_context_reg( context, info->regs[i] ));
1147 break;
1148 case RULE_EXPRESSION:
1149 value = eval_expression( (const unsigned char *)info->regs[i], context );
1150 set_context_reg( &new_context, i, (void *)value );
1151 break;
1152 case RULE_VAL_EXPRESSION:
1153 value = eval_expression( (const unsigned char *)info->regs[i], context );
1154 set_context_reg( &new_context, i, &value );
1155 break;
1156 }
1157 }
1158 new_context.Rsp = cfa;
1159 *context = new_context;
1160 }
1161
1162
1163 /***********************************************************************
1164 * dwarf_virtual_unwind
1165 *
1166 * Equivalent of RtlVirtualUnwind for builtin modules.
1167 */
1168 static NTSTATUS dwarf_virtual_unwind( ULONG64 ip, ULONG64 *frame,CONTEXT *context,
1169 const struct dwarf_fde *fde, const struct dwarf_eh_bases *bases,
1170 PEXCEPTION_ROUTINE *handler, void **handler_data )
1171 {
1172 const struct dwarf_cie *cie;
1173 const unsigned char *ptr, *augmentation, *end;
1174 ULONG_PTR len, code_end;
1175 struct frame_info info;
1176 int aug_z_format = 0;
1177 unsigned char lsda_encoding = DW_EH_PE_omit;
1178
1179 memset( &info, 0, sizeof(info) );
1180 info.ip = (ULONG_PTR)bases->func;
1181 *handler = NULL;
1182
1183 cie = (const struct dwarf_cie *)((const char *)&fde->cie_offset - fde->cie_offset);
1184
1185 /* parse the CIE first */
1186
1187 if (cie->version != 1)
1188 {
1189 FIXME( "unknown CIE version %u at %p\n", cie->version, cie );
1190 return STATUS_INVALID_DISPOSITION;
1191 }
1192 ptr = cie->augmentation + strlen((const char *)cie->augmentation) + 1;
1193
1194 info.code_align = dwarf_get_uleb128( &ptr );
1195 info.data_align = dwarf_get_sleb128( &ptr );
1196 info.retaddr_reg = *ptr++;
1197 info.cfa_rule = RULE_CFA_OFFSET;
1198
1199 TRACE( "function %lx base %p cie %p len %x id %x version %x aug '%s' code_align %lu data_align %ld retaddr %s\n",
1200 ip, bases->func, cie, cie->length, cie->id, cie->version, cie->augmentation,
1201 info.code_align, info.data_align, dwarf_reg_names[info.retaddr_reg] );
1202
1203 end = NULL;
1204 for (augmentation = cie->augmentation; *augmentation; augmentation++)
1205 {
1206 switch (*augmentation)
1207 {
1208 case 'z':
1209 len = dwarf_get_uleb128( &ptr );
1210 end = ptr + len;
1211 aug_z_format = 1;
1212 continue;
1213 case 'L':
1214 lsda_encoding = *ptr++;
1215 continue;
1216 case 'P':
1217 {
1218 unsigned char encoding = *ptr++;
1219 *handler = (void *)dwarf_get_ptr( &ptr, encoding );
1220 continue;
1221 }
1222 case 'R':
1223 info.fde_encoding = *ptr++;
1224 continue;
1225 case 'S':
1226 info.signal_frame = 1;
1227 continue;
1228 }
1229 FIXME( "unknown augmentation '%c'\n", *augmentation );
1230 if (!end) return STATUS_INVALID_DISPOSITION; /* cannot continue */
1231 break;
1232 }
1233 if (end) ptr = end;
1234
1235 end = (const unsigned char *)(&cie->length + 1) + cie->length;
1236 execute_cfa_instructions( ptr, end, ip, &info );
1237
1238 ptr = (const unsigned char *)(fde + 1);
1239 info.ip = dwarf_get_ptr( &ptr, info.fde_encoding ); /* fde code start */
1240 code_end = info.ip + dwarf_get_ptr( &ptr, info.fde_encoding & 0x0f ); /* fde code length */
1241
1242 if (aug_z_format) /* get length of augmentation data */
1243 {
1244 len = dwarf_get_uleb128( &ptr );
1245 end = ptr + len;
1246 }
1247 else end = NULL;
1248
1249 *handler_data = (void *)dwarf_get_ptr( &ptr, lsda_encoding );
1250 if (end) ptr = end;
1251
1252 end = (const unsigned char *)(&fde->length + 1) + fde->length;
1253 TRACE( "fde %p len %x personality %p lsda %p code %lx-%lx\n",
1254 fde, fde->length, *handler, *handler_data, info.ip, code_end );
1255 execute_cfa_instructions( ptr, end, ip, &info );
1256 apply_frame_info( context, &info );
1257 *frame = context->Rsp;
1258
1259 TRACE( "next function rip=%016lx\n", context->Rip );
1260 TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
1261 context->Rax, context->Rbx, context->Rcx, context->Rdx );
1262 TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
1263 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
1264 TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
1265 context->R8, context->R9, context->R10, context->R11 );
1266 TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
1267 context->R12, context->R13, context->R14, context->R15 );
1268
1269 return STATUS_SUCCESS;
1270 }
1271
1272
1273 /***********************************************************************
1274 * dispatch_signal
1275 */
1276 static inline int dispatch_signal(unsigned int sig)
1277 {
1278 if (handlers[sig] == NULL) return 0;
1279 return handlers[sig](sig);
1280 }
1281
1282 /***********************************************************************
1283 * get_signal_stack
1284 *
1285 * Get the base of the signal stack for the current thread.
1286 */
1287 static inline void *get_signal_stack(void)
1288 {
1289 return (char *)NtCurrentTeb() + teb_size;
1290 }
1291
1292 /***********************************************************************
1293 * is_inside_signal_stack
1294 *
1295 * Check if pointer is inside the signal stack.
1296 */
1297 static inline int is_inside_signal_stack( void *ptr )
1298 {
1299 return ((char *)ptr >= (char *)get_signal_stack() &&
1300 (char *)ptr < (char *)get_signal_stack() + signal_stack_size);
1301 }
1302
1303 /***********************************************************************
1304 * save_context
1305 *
1306 * Set the register values from a sigcontext.
1307 */
1308 static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
1309 {
1310 context->ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS;
1311 context->Rax = RAX_sig(sigcontext);
1312 context->Rcx = RCX_sig(sigcontext);
1313 context->Rdx = RDX_sig(sigcontext);
1314 context->Rbx = RBX_sig(sigcontext);
1315 context->Rsp = RSP_sig(sigcontext);
1316 context->Rbp = RBP_sig(sigcontext);
1317 context->Rsi = RSI_sig(sigcontext);
1318 context->Rdi = RDI_sig(sigcontext);
1319 context->R8 = R8_sig(sigcontext);
1320 context->R9 = R9_sig(sigcontext);
1321 context->R10 = R10_sig(sigcontext);
1322 context->R11 = R11_sig(sigcontext);
1323 context->R12 = R12_sig(sigcontext);
1324 context->R13 = R13_sig(sigcontext);
1325 context->R14 = R14_sig(sigcontext);
1326 context->R15 = R15_sig(sigcontext);
1327 context->Rip = RIP_sig(sigcontext);
1328 context->SegCs = CS_sig(sigcontext);
1329 context->SegFs = FS_sig(sigcontext);
1330 context->SegGs = GS_sig(sigcontext);
1331 context->EFlags = EFL_sig(sigcontext);
1332 #ifdef DS_sig
1333 context->SegDs = DS_sig(sigcontext);
1334 #else
1335 __asm__("movw %%ds,%0" : "=m" (context->SegDs));
1336 #endif
1337 #ifdef ES_sig
1338 context->SegEs = ES_sig(sigcontext);
1339 #else
1340 __asm__("movw %%es,%0" : "=m" (context->SegEs));
1341 #endif
1342 #ifdef SS_sig
1343 context->SegSs = SS_sig(sigcontext);
1344 #else
1345 __asm__("movw %%ss,%0" : "=m" (context->SegSs));
1346 #endif
1347 if (FPU_sig(sigcontext))
1348 {
1349 context->ContextFlags |= CONTEXT_FLOATING_POINT;
1350 context->u.FltSave = *FPU_sig(sigcontext);
1351 context->MxCsr = context->u.FltSave.MxCsr;
1352 }
1353 }
1354
1355
1356 /***********************************************************************
1357 * restore_context
1358 *
1359 * Build a sigcontext from the register values.
1360 */
1361 static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
1362 {
1363 RAX_sig(sigcontext) = context->Rax;
1364 RCX_sig(sigcontext) = context->Rcx;
1365 RDX_sig(sigcontext) = context->Rdx;
1366 RBX_sig(sigcontext) = context->Rbx;
1367 RSP_sig(sigcontext) = context->Rsp;
1368 RBP_sig(sigcontext) = context->Rbp;
1369 RSI_sig(sigcontext) = context->Rsi;
1370 RDI_sig(sigcontext) = context->Rdi;
1371 R8_sig(sigcontext) = context->R8;
1372 R9_sig(sigcontext) = context->R9;
1373 R10_sig(sigcontext) = context->R10;
1374 R11_sig(sigcontext) = context->R11;
1375 R12_sig(sigcontext) = context->R12;
1376 R13_sig(sigcontext) = context->R13;
1377 R14_sig(sigcontext) = context->R14;
1378 R15_sig(sigcontext) = context->R15;
1379 RIP_sig(sigcontext) = context->Rip;
1380 CS_sig(sigcontext) = context->SegCs;
1381 FS_sig(sigcontext) = context->SegFs;
1382 GS_sig(sigcontext) = context->SegGs;
1383 EFL_sig(sigcontext) = context->EFlags;
1384 #ifdef DS_sig
1385 DS_sig(sigcontext) = context->SegDs;
1386 #endif
1387 #ifdef ES_sig
1388 ES_sig(sigcontext) = context->SegEs;
1389 #endif
1390 #ifdef SS_sig
1391 SS_sig(sigcontext) = context->SegSs;
1392 #endif
1393 if (FPU_sig(sigcontext)) *FPU_sig(sigcontext) = context->u.FltSave;
1394 }
1395
1396
1397 /***********************************************************************
1398 * RtlCaptureContext (NTDLL.@)
1399 */
1400 void WINAPI __regs_RtlCaptureContext( CONTEXT *context, CONTEXT *regs )
1401 {
1402 *context = *regs;
1403 }
1404 DEFINE_REGS_ENTRYPOINT( RtlCaptureContext, 1 )
1405
1406
1407 /***********************************************************************
1408 * set_cpu_context
1409 *
1410 * Set the new CPU context.
1411 */
1412 void set_cpu_context( const CONTEXT *context )
1413 {
1414 extern void CDECL __wine_restore_regs( const CONTEXT * ) DECLSPEC_NORETURN;
1415 __wine_restore_regs( context );
1416 }
1417
1418
1419 /***********************************************************************
1420 * copy_context
1421 *
1422 * Copy a register context according to the flags.
1423 */
1424 void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
1425 {
1426 flags &= ~CONTEXT_AMD64; /* get rid of CPU id */
1427 if (flags & CONTEXT_CONTROL)
1428 {
1429 to->Rbp = from->Rbp;
1430 to->Rip = from->Rip;
1431 to->Rsp = from->Rsp;
1432 to->SegCs = from->SegCs;
1433 to->SegSs = from->SegSs;
1434 to->EFlags = from->EFlags;
1435 }
1436 if (flags & CONTEXT_INTEGER)
1437 {
1438 to->Rax = from->Rax;
1439 to->Rcx = from->Rcx;
1440 to->Rdx = from->Rdx;
1441 to->Rbx = from->Rbx;
1442 to->Rsi = from->Rsi;
1443 to->Rdi = from->Rdi;
1444 to->R8 = from->R8;
1445 to->R9 = from->R9;
1446 to->R10 = from->R10;
1447 to->R11 = from->R11;
1448 to->R12 = from->R12;
1449 to->R13 = from->R13;
1450 to->R14 = from->R14;
1451 to->R15 = from->R15;
1452 }
1453 if (flags & CONTEXT_SEGMENTS)
1454 {
1455 to->SegDs = from->SegDs;
1456 to->SegEs = from->SegEs;
1457 to->SegFs = from->SegFs;
1458 to->SegGs = from->SegGs;
1459 }
1460 if (flags & CONTEXT_FLOATING_POINT)
1461 {
1462 to->MxCsr = from->MxCsr;
1463 to->u.FltSave = from->u.FltSave;
1464 }
1465 if (flags & CONTEXT_DEBUG_REGISTERS)
1466 {
1467 to->Dr0 = from->Dr0;
1468 to->Dr1 = from->Dr1;
1469 to->Dr2 = from->Dr2;
1470 to->Dr3 = from->Dr3;
1471 to->Dr6 = from->Dr6;
1472 to->Dr7 = from->Dr7;
1473 }
1474 }
1475
1476
1477 /***********************************************************************
1478 * context_to_server
1479 *
1480 * Convert a register context to the server format.
1481 */
1482 NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
1483 {
1484 DWORD flags = from->ContextFlags & ~CONTEXT_AMD64; /* get rid of CPU id */
1485
1486 memset( to, 0, sizeof(*to) );
1487 to->cpu = CPU_x86_64;
1488
1489 if (flags & CONTEXT_CONTROL)
1490 {
1491 to->flags |= SERVER_CTX_CONTROL;
1492 to->ctl.x86_64_regs.rbp = from->Rbp;
1493 to->ctl.x86_64_regs.rip = from->Rip;
1494 to->ctl.x86_64_regs.rsp = from->Rsp;
1495 to->ctl.x86_64_regs.cs = from->SegCs;
1496 to->ctl.x86_64_regs.ss = from->SegSs;
1497 to->ctl.x86_64_regs.flags = from->EFlags;
1498 }
1499 if (flags & CONTEXT_INTEGER)
1500 {
1501 to->flags |= SERVER_CTX_INTEGER;
1502 to->integer.x86_64_regs.rax = from->Rax;
1503 to->integer.x86_64_regs.rcx = from->Rcx;
1504 to->integer.x86_64_regs.rdx = from->Rdx;
1505 to->integer.x86_64_regs.rbx = from->Rbx;
1506 to->integer.x86_64_regs.rsi = from->Rsi;
1507 to->integer.x86_64_regs.rdi = from->Rdi;
1508 to->integer.x86_64_regs.r8 = from->R8;
1509 to->integer.x86_64_regs.r9 = from->R9;
1510 to->integer.x86_64_regs.r10 = from->R10;
1511 to->integer.x86_64_regs.r11 = from->R11;
1512 to->integer.x86_64_regs.r12 = from->R12;
1513 to->integer.x86_64_regs.r13 = from->R13;
1514 to->integer.x86_64_regs.r14 = from->R14;
1515 to->integer.x86_64_regs.r15 = from->R15;
1516 }
1517 if (flags & CONTEXT_SEGMENTS)
1518 {
1519 to->flags |= SERVER_CTX_SEGMENTS;
1520 to->seg.x86_64_regs.ds = from->SegDs;
1521 to->seg.x86_64_regs.es = from->SegEs;
1522 to->seg.x86_64_regs.fs = from->SegFs;
1523 to->seg.x86_64_regs.gs = from->SegGs;
1524 }
1525 if (flags & CONTEXT_FLOATING_POINT)
1526 {
1527 to->flags |= SERVER_CTX_FLOATING_POINT;
1528 memcpy( to->fp.x86_64_regs.fpregs, &from->u.FltSave, sizeof(to->fp.x86_64_regs.fpregs) );
1529 }
1530 if (flags & CONTEXT_DEBUG_REGISTERS)
1531 {
1532 to->flags |= SERVER_CTX_DEBUG_REGISTERS;
1533 to->debug.x86_64_regs.dr0 = from->Dr0;
1534 to->debug.x86_64_regs.dr1 = from->Dr1;
1535 to->debug.x86_64_regs.dr2 = from->Dr2;
1536 to->debug.x86_64_regs.dr3 = from->Dr3;
1537 to->debug.x86_64_regs.dr6 = from->Dr6;
1538 to->debug.x86_64_regs.dr7 = from->Dr7;
1539 }
1540 return STATUS_SUCCESS;
1541 }
1542
1543
1544 /***********************************************************************
1545 * context_from_server
1546 *
1547 * Convert a register context from the server format.
1548 */
1549 NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
1550 {
1551 if (from->cpu != CPU_x86_64) return STATUS_INVALID_PARAMETER;
1552
1553 to->ContextFlags = CONTEXT_AMD64;
1554 if (from->flags & SERVER_CTX_CONTROL)
1555 {
1556 to->ContextFlags |= CONTEXT_CONTROL;
1557 to->Rbp = from->ctl.x86_64_regs.rbp;
1558 to->Rip = from->ctl.x86_64_regs.rip;
1559 to->Rsp = from->ctl.x86_64_regs.rsp;
1560 to->SegCs = from->ctl.x86_64_regs.cs;
1561 to->SegSs = from->ctl.x86_64_regs.ss;
1562 to->EFlags = from->ctl.x86_64_regs.flags;
1563 }
1564
1565 if (from->flags & SERVER_CTX_INTEGER)
1566 {
1567 to->ContextFlags |= CONTEXT_INTEGER;
1568 to->Rax = from->integer.x86_64_regs.rax;
1569 to->Rcx = from->integer.x86_64_regs.rcx;
1570 to->Rdx = from->integer.x86_64_regs.rdx;
1571 to->Rbx = from->integer.x86_64_regs.rbx;
1572 to->Rsi = from->integer.x86_64_regs.rsi;
1573 to->Rdi = from->integer.x86_64_regs.rdi;
1574 to->R8 = from->integer.x86_64_regs.r8;
1575 to->R9 = from->integer.x86_64_regs.r9;
1576 to->R10 = from->integer.x86_64_regs.r10;
1577 to->R11 = from->integer.x86_64_regs.r11;
1578 to->R12 = from->integer.x86_64_regs.r12;
1579 to->R13 = from->integer.x86_64_regs.r13;
1580 to->R14 = from->integer.x86_64_regs.r14;
1581 to->R15 = from->integer.x86_64_regs.r15;
1582 }
1583 if (from->flags & SERVER_CTX_SEGMENTS)
1584 {
1585 to->ContextFlags |= CONTEXT_SEGMENTS;
1586 to->SegDs = from->seg.x86_64_regs.ds;
1587 to->SegEs = from->seg.x86_64_regs.es;
1588 to->SegFs = from->seg.x86_64_regs.fs;
1589 to->SegGs = from->seg.x86_64_regs.gs;
1590 }
1591 if (from->flags & SERVER_CTX_FLOATING_POINT)
1592 {
1593 to->ContextFlags |= CONTEXT_FLOATING_POINT;
1594 memcpy( &to->u.FltSave, from->fp.x86_64_regs.fpregs, sizeof(from->fp.x86_64_regs.fpregs) );
1595 to->MxCsr = to->u.FltSave.MxCsr;
1596 }
1597 if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
1598 {
1599 to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
1600 to->Dr0 = from->debug.x86_64_regs.dr0;
1601 to->Dr1 = from->debug.x86_64_regs.dr1;
1602 to->Dr2 = from->debug.x86_64_regs.dr2;
1603 to->Dr3 = from->debug.x86_64_regs.dr3;
1604 to->Dr6 = from->debug.x86_64_regs.dr6;
1605 to->Dr7 = from->debug.x86_64_regs.dr7;
1606 }
1607 return STATUS_SUCCESS;
1608 }
1609
1610
1611 extern void raise_func_trampoline( EXCEPTION_RECORD *rec, CONTEXT *context, raise_func func );
1612 __ASM_GLOBAL_FUNC( raise_func_trampoline,
1613 ".cfi_signal_frame\n\t"
1614 ".cfi_def_cfa %rbp,144\n\t" /* red zone + rip + rbp */
1615 ".cfi_rel_offset %rip,8\n\t"
1616 ".cfi_rel_offset %rbp,0\n\t"
1617 "call *%rdx\n\t"
1618 "int $3")
1619
1620 /***********************************************************************
1621 * setup_exception
1622 *
1623 * Setup a proper stack frame for the raise function, and modify the
1624 * sigcontext so that the return from the signal handler will call
1625 * the raise function.
1626 */
1627 static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func )
1628 {
1629 struct stack_layout
1630 {
1631 CONTEXT context;
1632 EXCEPTION_RECORD rec;
1633 ULONG64 rbp;
1634 ULONG64 rip;
1635 ULONG64 red_zone[16];
1636 } *stack;
1637 ULONG64 *rsp_ptr;
1638 DWORD exception_code = 0;
1639
1640 stack = (struct stack_layout *)(RSP_sig(sigcontext) & ~15);
1641
1642 /* stack sanity checks */
1643
1644 if (is_inside_signal_stack( stack ))
1645 {
1646 ERR( "nested exception on signal stack in thread %04x eip %016lx esp %016lx stack %p-%p\n",
1647 GetCurrentThreadId(), RIP_sig(sigcontext), RSP_sig(sigcontext),
1648 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1649 abort_thread(1);
1650 }
1651
1652 if (stack - 1 > stack || /* check for overflow in subtraction */
1653 (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack ||
1654 (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
1655 {
1656 WARN( "exception outside of stack limits in thread %04x eip %016lx esp %016lx stack %p-%p\n",
1657 GetCurrentThreadId(), RIP_sig(sigcontext), RSP_sig(sigcontext),
1658 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1659 }
1660 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096)
1661 {
1662 /* stack overflow on last page, unrecoverable */
1663 UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1);
1664 ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
1665 diff, GetCurrentThreadId(), RIP_sig(sigcontext),
1666 RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1667 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1668 abort_thread(1);
1669 }
1670 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit)
1671 {
1672 /* stack access below stack limit, may be recoverable */
1673 if (virtual_handle_stack_fault( stack - 1 )) exception_code = EXCEPTION_STACK_OVERFLOW;
1674 else
1675 {
1676 UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1);
1677 ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
1678 diff, GetCurrentThreadId(), RIP_sig(sigcontext),
1679 RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1680 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1681 abort_thread(1);
1682 }
1683 }
1684
1685 stack--; /* push the stack_layout structure */
1686 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
1687 VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack));
1688 #elif defined(VALGRIND_MAKE_WRITABLE)
1689 VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack));
1690 #endif
1691 stack->rec.ExceptionRecord = NULL;
1692 stack->rec.ExceptionCode = exception_code;
1693 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1694 stack->rec.ExceptionAddress = (void *)RIP_sig(sigcontext);
1695 stack->rec.NumberParameters = 0;
1696 save_context( &stack->context, sigcontext );
1697
1698 /* store return address and %rbp without aligning, so that the offset is fixed */
1699 rsp_ptr = (ULONG64 *)RSP_sig(sigcontext) - 16;
1700 *(--rsp_ptr) = RIP_sig(sigcontext);
1701 *(--rsp_ptr) = RBP_sig(sigcontext);
1702
1703 /* now modify the sigcontext to return to the raise function */
1704 RIP_sig(sigcontext) = (ULONG_PTR)raise_func_trampoline;
1705 RDI_sig(sigcontext) = (ULONG_PTR)&stack->rec;
1706 RSI_sig(sigcontext) = (ULONG_PTR)&stack->context;
1707 RDX_sig(sigcontext) = (ULONG_PTR)func;
1708 RBP_sig(sigcontext) = (ULONG_PTR)rsp_ptr;
1709 RSP_sig(sigcontext) = (ULONG_PTR)stack;
1710 /* clear single-step, direction, and align check flag */
1711 EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
1712
1713 return &stack->rec;
1714 }
1715
1716
1717 /**********************************************************************
1718 * find_function_info
1719 */
1720 static RUNTIME_FUNCTION *find_function_info( ULONG64 pc, HMODULE module,
1721 RUNTIME_FUNCTION *func, ULONG size )
1722 {
1723 int min = 0;
1724 int max = size/sizeof(*func) - 1;
1725
1726 while (min <= max)
1727 {
1728 int pos = (min + max) / 2;
1729 if ((char *)pc < (char *)module + func[pos].BeginAddress) max = pos - 1;
1730 else if ((char *)pc >= (char *)module + func[pos].EndAddress) min = pos + 1;
1731 else
1732 {
1733 func += pos;
1734 while (func->UnwindData & 1) /* follow chained entry */
1735 func = (RUNTIME_FUNCTION *)((char *)module + (func->UnwindData & ~1));
1736 return func;
1737 }
1738 }
1739 return NULL;
1740 }
1741
1742
1743 /**********************************************************************
1744 * call_handler
1745 *
1746 * Call a single exception handler.
1747 * FIXME: Handle nested exceptions.
1748 */
1749 static NTSTATUS call_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch, CONTEXT *orig_context )
1750 {
1751 DWORD res;
1752
1753 dispatch->ControlPc = dispatch->ContextRecord->Rip;
1754
1755 TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
1756 dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
1757 res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
1758 TRACE( "handler at %p returned %u\n", dispatch->LanguageHandler, res );
1759
1760 switch (res)
1761 {
1762 case ExceptionContinueExecution:
1763 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
1764 *orig_context = *dispatch->ContextRecord;
1765 return STATUS_SUCCESS;
1766 case ExceptionContinueSearch:
1767 break;
1768 case ExceptionNestedException:
1769 break;
1770 default:
1771 return STATUS_INVALID_DISPOSITION;
1772 }
1773 return STATUS_UNHANDLED_EXCEPTION;
1774 }
1775
1776
1777 /**********************************************************************
1778 * call_teb_handler
1779 *
1780 * Call a single exception handler from the TEB chain.
1781 * FIXME: Handle nested exceptions.
1782 */
1783 static NTSTATUS call_teb_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
1784 EXCEPTION_REGISTRATION_RECORD *teb_frame, CONTEXT *orig_context )
1785 {
1786 EXCEPTION_REGISTRATION_RECORD *dispatcher;
1787 DWORD res;
1788
1789 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatcher=%p)\n",
1790 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, &dispatcher );
1791 res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, &dispatcher );
1792 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
1793
1794 switch (res)
1795 {
1796 case ExceptionContinueExecution:
1797 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
1798 *orig_context = *dispatch->ContextRecord;
1799 return STATUS_SUCCESS;
1800 case ExceptionContinueSearch:
1801 break;
1802 case ExceptionNestedException:
1803 break;
1804 default:
1805 return STATUS_INVALID_DISPOSITION;
1806 }
1807 return STATUS_UNHANDLED_EXCEPTION;
1808 }
1809
1810
1811 /**********************************************************************
1812 * call_stack_handlers
1813 *
1814 * Call the stack handlers chain.
1815 */
1816 static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *orig_context )
1817 {
1818 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
1819 UNWIND_HISTORY_TABLE table;
1820 DISPATCHER_CONTEXT dispatch;
1821 CONTEXT context, new_context;
1822 LDR_MODULE *module;
1823 DWORD size;
1824 NTSTATUS status;
1825
1826 context = *orig_context;
1827 dispatch.TargetIp = 0;
1828 dispatch.ContextRecord = &context;
1829 dispatch.HistoryTable = &table;
1830 dispatch.ScopeIndex = 0; /* FIXME */
1831 for (;;)
1832 {
1833 new_context = context;
1834
1835 /* FIXME: should use the history table to make things faster */
1836
1837 module = NULL;
1838 dispatch.ImageBase = 0;
1839
1840 /* first look for PE exception information */
1841
1842 if (!LdrFindEntryForAddress( (void *)context.Rip, &module ))
1843 {
1844 RUNTIME_FUNCTION *dir;
1845
1846 dispatch.ImageBase = (ULONG64)module->BaseAddress;
1847 if ((dir = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE,
1848 IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )))
1849 {
1850 if ((dispatch.FunctionEntry = find_function_info( context.Rip, module->BaseAddress,
1851 dir, size )))
1852 {
1853 dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_EHANDLER, dispatch.ImageBase,
1854 context.Rip, dispatch.FunctionEntry,
1855 &new_context, &dispatch.HandlerData,
1856 &dispatch.EstablisherFrame, NULL );
1857 goto unwind_done;
1858 }
1859 }
1860 else if (!(module->Flags & LDR_WINE_INTERNAL))
1861 WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
1862 }
1863
1864 /* then look for host system exception information */
1865
1866 if (!module || (module->Flags & LDR_WINE_INTERNAL))
1867 {
1868 struct dwarf_eh_bases bases;
1869 const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context.Rip - 1), &bases );
1870
1871 if (fde)
1872 {
1873 status = dwarf_virtual_unwind( context.Rip, &dispatch.EstablisherFrame, &new_context,
1874 fde, &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
1875 if (status != STATUS_SUCCESS) return status;
1876 dispatch.FunctionEntry = NULL;
1877 if (dispatch.LanguageHandler && !module)
1878 {
1879 FIXME( "calling personality routine in system library not supported yet\n" );
1880 dispatch.LanguageHandler = NULL;
1881 }
1882 goto unwind_done;
1883 }
1884 }
1885
1886 /* no exception information, treat as a leaf function */
1887
1888 new_context.Rip = *(ULONG64 *)context.Rsp;
1889 new_context.Rsp = context.Rsp + sizeof(ULONG64);
1890 dispatch.EstablisherFrame = new_context.Rsp;
1891 dispatch.LanguageHandler = NULL;
1892
1893 unwind_done:
1894 if (!dispatch.EstablisherFrame) break;
1895
1896 if ((dispatch.EstablisherFrame & 7) ||
1897 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
1898 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
1899 {
1900 ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
1901 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1902 rec->ExceptionFlags |= EH_STACK_INVALID;
1903 break;
1904 }
1905
1906 if (dispatch.LanguageHandler)
1907 {
1908 status = call_handler( rec, &dispatch, orig_context );
1909 if (status != STATUS_UNHANDLED_EXCEPTION) return status;
1910 }
1911 /* hack: call wine handlers registered in the tib list */
1912 else while ((ULONG64)teb_frame < new_context.Rsp)
1913 {
1914 TRACE( "found wine frame %p rsp %lx handler %p\n",
1915 teb_frame, new_context.Rsp, teb_frame->Handler );
1916 dispatch.EstablisherFrame = (ULONG64)teb_frame;
1917 context = *orig_context;
1918 status = call_teb_handler( rec, &dispatch, teb_frame, orig_context );
1919 if (status != STATUS_UNHANDLED_EXCEPTION) return status;
1920 teb_frame = teb_frame->Prev;
1921 }
1922
1923 if (new_context.Rsp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break;
1924 context = new_context;
1925 }
1926 return STATUS_UNHANDLED_EXCEPTION;
1927 }
1928
1929
1930 /*******************************************************************
1931 * raise_exception
1932 *
1933 * Implementation of NtRaiseException.
1934 */
1935 static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
1936 {
1937 NTSTATUS status;
1938
1939 if (first_chance)
1940 {
1941 DWORD c;
1942
1943 TRACE( "code=%x flags=%x addr=%p ip=%lx tid=%04x\n",
1944 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
1945 context->Rip, GetCurrentThreadId() );
1946 for (c = 0; c < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); c++)
1947 TRACE( " info[%d]=%08lx\n", c, rec->ExceptionInformation[c] );
1948 if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
1949 {
1950 if (rec->ExceptionInformation[1] >> 16)
1951 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
1952 rec->ExceptionAddress,
1953 (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
1954 else
1955 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
1956 rec->ExceptionAddress,
1957 (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
1958 }
1959 else
1960 {
1961 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
1962 context->Rax, context->Rbx, context->Rcx, context->Rdx );
1963 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
1964 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
1965 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
1966 context->R8, context->R9, context->R10, context->R11 );
1967 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
1968 context->R12, context->R13, context->R14, context->R15 );
1969 }
1970 status = send_debug_event( rec, TRUE, context );
1971 if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
1972 return STATUS_SUCCESS;
1973
1974 if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
1975 return STATUS_SUCCESS;
1976
1977 if ((status = call_stack_handlers( rec, context )) != STATUS_UNHANDLED_EXCEPTION)
1978 return status;
1979 }
1980
1981 /* last chance exception */
1982
1983 status = send_debug_event( rec, FALSE, context );
1984 if (status != DBG_CONTINUE)
1985 {
1986 if (rec->ExceptionFlags & EH_STACK_INVALID)
1987 ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
1988 else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
1989 ERR("Process attempted to continue execution after noncontinuable exception.\n");
1990 else
1991 ERR("Unhandled exception code %x flags %x addr %p\n",
1992 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
1993 NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
1994 }
1995 return STATUS_SUCCESS;
1996 }
1997
1998
1999 /**********************************************************************
2000 * raise_segv_exception
2001 */
2002 static void raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2003 {
2004 NTSTATUS status;
2005
2006 switch(rec->ExceptionCode)
2007 {
2008 case EXCEPTION_ACCESS_VIOLATION:
2009 if (rec->NumberParameters == 2)
2010 {
2011 if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
2012 rec->ExceptionInformation[0] )))
2013 set_cpu_context( context );
2014 }
2015 break;
2016 }
2017 status = raise_exception( rec, context, TRUE );
2018 if (status) raise_status( status, rec );
2019 set_cpu_context( context );
2020 }
2021
2022
2023 /**********************************************************************
2024 * raise_generic_exception
2025 *
2026 * Generic raise function for exceptions that don't need special treatment.
2027 */
2028 static void raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2029 {
2030 NTSTATUS status = raise_exception( rec, context, TRUE );
2031 if (status) raise_status( status, rec );
2032 set_cpu_context( context );
2033 }
2034
2035
2036 /**********************************************************************
2037 * segv_handler
2038 *
2039 * Handler for SIGSEGV and related errors.
2040 */
2041 static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2042 {
2043 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_segv_exception );
2044 ucontext_t *ucontext = sigcontext;
2045
2046 switch(TRAP_sig(ucontext))
2047 {
2048 case TRAP_x86_OFLOW: /* Overflow exception */
2049 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2050 break;
2051 case TRAP_x86_BOUND: /* Bound range exception */
2052 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2053 break;
2054 case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
2055 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2056 break;
2057 case TRAP_x86_STKFLT: /* Stack fault */
2058 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2059 break;
2060 case TRAP_x86_SEGNPFLT: /* Segment not present exception */
2061 case TRAP_x86_PROTFLT: /* General protection fault */
2062 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2063 rec->ExceptionCode = ERROR_sig(ucontext) ? EXCEPTION_ACCESS_VIOLATION : EXCEPTION_PRIV_INSTRUCTION;
2064 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2065 break;
2066 case TRAP_x86_PAGEFLT: /* Page fault */
2067 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2068 rec->NumberParameters = 2;
2069 rec->ExceptionInformation[0] = (ERROR_sig(ucontext) & 2) != 0;
2070 rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
2071 break;
2072 case TRAP_x86_ALIGNFLT: /* Alignment check exception */
2073 rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
2074 break;
2075 default:
2076 ERR( "Got unexpected trap %ld\n", TRAP_sig(ucontext) );
2077 /* fall through */
2078 case TRAP_x86_NMI: /* NMI interrupt */
2079 case TRAP_x86_DNA: /* Device not available exception */
2080 case TRAP_x86_DOUBLEFLT: /* Double fault exception */
2081 case TRAP_x86_TSSFLT: /* Invalid TSS exception */
2082 case TRAP_x86_MCHK: /* Machine check exception */
2083 case TRAP_x86_CACHEFLT: /* Cache flush exception */
2084 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2085 break;
2086 }
2087 }
2088
2089 /**********************************************************************
2090 * trap_handler
2091 *
2092 * Handler for SIGTRAP.
2093 */
2094 static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2095 {
2096 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2097
2098 switch (siginfo->si_code)
2099 {
2100 case TRAP_TRACE: /* Single-step exception */
2101 case 4 /* TRAP_HWBKPT */: /* Hardware breakpoint exception */
2102 rec->ExceptionCode = EXCEPTION_SINGLE_STEP;
2103 break;
2104 case TRAP_BRKPT: /* Breakpoint exception */
2105 rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */
2106 /* fall through */
2107 default:
2108 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
2109 break;
2110 }
2111 }
2112
2113 /**********************************************************************
2114 * fpe_handler
2115 *
2116 * Handler for SIGFPE.
2117 */
2118 static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2119 {
2120 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2121
2122 switch (siginfo->si_code)
2123 {
2124 case FPE_FLTSUB:
2125 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2126 break;
2127 case FPE_INTDIV:
2128 rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
2129 break;
2130 case FPE_INTOVF:
2131 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2132 break;
2133 case FPE_FLTDIV:
2134 rec->ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
2135 break;
2136 case FPE_FLTOVF:
2137 rec->ExceptionCode = EXCEPTION_FLT_OVERFLOW;
2138 break;
2139 case FPE_FLTUND:
2140 rec->ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
2141 break;
2142 case FPE_FLTRES:
2143 rec->ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
2144 break;
2145 case FPE_FLTINV:
2146 default:
2147 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2148 break;
2149 }
2150 }
2151
2152 /**********************************************************************
2153 * int_handler
2154 *
2155 * Handler for SIGINT.
2156 */
2157 static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2158 {
2159 if (!dispatch_signal(SIGINT))
2160 {
2161 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2162 rec->ExceptionCode = CONTROL_C_EXIT;
2163 }
2164 }
2165
2166
2167 /**********************************************************************
2168 * abrt_handler
2169 *
2170 * Handler for SIGABRT.
2171 */
2172 static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2173 {
2174 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2175 rec->ExceptionCode = EXCEPTION_WINE_ASSERTION;
2176 rec->ExceptionFlags = EH_NONCONTINUABLE;
2177 }
2178
2179
2180 /**********************************************************************
2181 * quit_handler
2182 *
2183 * Handler for SIGQUIT.
2184 */
2185 static void quit_handler( int signal, siginfo_t *siginfo, void *ucontext )
2186 {
2187 abort_thread(0);
2188 }
2189
2190
2191 /**********************************************************************
2192 * usr1_handler
2193 *
2194 * Handler for SIGUSR1, used to signal a thread that it got suspended.
2195 */
2196 static void usr1_handler( int signal, siginfo_t *siginfo, void *ucontext )
2197 {
2198 CONTEXT context;
2199
2200 save_context( &context, ucontext );
2201 wait_suspend( &context );
2202 restore_context( &context, ucontext );
2203 }
2204
2205
2206 /***********************************************************************
2207 * __wine_set_signal_handler (NTDLL.@)
2208 */
2209 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
2210 {
2211 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
2212 if (handlers[sig] != NULL) return -2;
2213 handlers[sig] = wsh;
2214 return 0;
2215 }
2216
2217
2218 /**********************************************************************
2219 * signal_alloc_thread
2220 */
2221 NTSTATUS signal_alloc_thread( TEB **teb )
2222 {
2223 static size_t sigstack_zero_bits;
2224 SIZE_T size;
2225 NTSTATUS status;
2226
2227 if (!sigstack_zero_bits)
2228 {
2229 size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
2230 /* find the first power of two not smaller than min_size */
2231 sigstack_zero_bits = 12;
2232 while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
2233 signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
2234 assert( sizeof(TEB) <= teb_size );
2235 }
2236
2237 size = 1 << sigstack_zero_bits;
2238 *teb = NULL;
2239 if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
2240 &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
2241 {
2242 (*teb)->Tib.Self = &(*teb)->Tib;
2243 (*teb)->Tib.ExceptionList = (void *)~0UL;
2244 }
2245 return status;
2246 }
2247
2248
2249 /**********************************************************************
2250 * signal_free_thread
2251 */
2252 void signal_free_thread( TEB *teb )
2253 {
2254 SIZE_T size;
2255
2256 if (teb->DeallocationStack)
2257 {
2258 size = 0;
2259 NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
2260 }
2261 size = 0;
2262 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
2263 }
2264
2265
2266 /**********************************************************************
2267 * signal_init_thread
2268 */
2269 void signal_init_thread( TEB *teb )
2270 {
2271 stack_t ss;
2272
2273 #ifdef __linux__
2274 arch_prctl( ARCH_SET_GS, teb );
2275 #else
2276 # error Please define setting %gs for your architecture
2277 #endif
2278
2279 ss.ss_sp = (char *)teb + teb_size;
2280 ss.ss_size = signal_stack_size;
2281 ss.ss_flags = 0;
2282 if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
2283 }
2284
2285 /**********************************************************************
2286 * signal_init_process
2287 */
2288 void signal_init_process(void)
2289 {
2290 struct sigaction sig_act;
2291
2292 sig_act.sa_mask = server_block_set;
2293 sig_act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
2294
2295 sig_act.sa_sigaction = int_handler;
2296 if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
2297 sig_act.sa_sigaction = fpe_handler;
2298 if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
2299 sig_act.sa_sigaction = abrt_handler;
2300 if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
2301 sig_act.sa_sigaction = quit_handler;
2302 if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
2303 sig_act.sa_sigaction = usr1_handler;
2304 if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
2305
2306 sig_act.sa_sigaction = segv_handler;
2307 if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
2308 if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
2309 #ifdef SIGBUS
2310 if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
2311 #endif
2312
2313 #ifdef SIGTRAP
2314 sig_act.sa_sigaction = trap_handler;
2315 if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
2316 #endif
2317 return;
2318
2319 error:
2320 perror("sigaction");
2321 exit(1);
2322 }
2323
2324
2325 /**********************************************************************
2326 * RtlAddFunctionTable (NTDLL.@)
2327 */
2328 BOOLEAN CDECL RtlAddFunctionTable( RUNTIME_FUNCTION *table, DWORD count, DWORD64 addr )
2329 {
2330 FIXME( "%p %u %lx: stub\n", table, count, addr );
2331 return FALSE;
2332 }
2333
2334
2335 /**********************************************************************
2336 * RtlDeleteFunctionTable (NTDLL.@)
2337 */
2338 BOOLEAN CDECL RtlDeleteFunctionTable( RUNTIME_FUNCTION *table )
2339 {
2340 FIXME( "%p: stub\n", table );
2341 return FALSE;
2342 }
2343
2344
2345 /**********************************************************************
2346 * RtlLookupFunctionEntry (NTDLL.@)
2347 */
2348 PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry( ULONG64 pc, ULONG64 *base, UNWIND_HISTORY_TABLE *table )
2349 {
2350 LDR_MODULE *module;
2351 RUNTIME_FUNCTION *func;
2352 ULONG size;
2353
2354 /* FIXME: should use the history table to make things faster */
2355
2356 if (LdrFindEntryForAddress( (void *)pc, &module ))
2357 {
2358 WARN( "module not found for %lx\n", pc );
2359 return NULL;
2360 }
2361 if (!(func = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE,
2362 IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )))
2363 {
2364 WARN( "no exception table found in module %p pc %lx\n", module->BaseAddress, pc );
2365 return NULL;
2366 }
2367 func = find_function_info( pc, module->BaseAddress, func, size );
2368 if (func) *base = (ULONG64)module->BaseAddress;
2369 return func;
2370 }
2371
2372 static ULONG64 get_int_reg( CONTEXT *context, int reg )
2373 {
2374 return *(&context->Rax + reg);
2375 }
2376
2377 static void set_int_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, ULONG64 val )
2378 {
2379 *(&context->Rax + reg) = val;
2380 if (ctx_ptr) ctx_ptr->u2.IntegerContext[reg] = &context->Rax + reg;
2381 }
2382
2383 static void set_float_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, M128A val )
2384 {
2385 *(&context->u.s.Xmm0 + reg) = val;
2386 if (ctx_ptr) ctx_ptr->u1.FloatingContext[reg] = &context->u.s.Xmm0 + reg;
2387 }
2388
2389 static int get_opcode_size( struct opcode op )
2390 {
2391 switch (op.code)
2392 {
2393 case UWOP_ALLOC_LARGE:
2394 return 2 + (op.info != 0);
2395 case UWOP_SAVE_NONVOL:
2396 case UWOP_SAVE_XMM128:
2397 return 2;
2398 case UWOP_SAVE_NONVOL_FAR:
2399 case UWOP_SAVE_XMM128_FAR:
2400 return 3;
2401 default:
2402 return 1;
2403 }
2404 }
2405
2406 static BOOL is_inside_epilog( BYTE *pc )
2407 {
2408 /* add or lea must be the first instruction, and it must have a rex.W prefix */
2409 if ((pc[0] & 0xf8) == 0x48)
2410 {
2411 switch (pc[1])
2412 {
2413 case 0x81: /* add $nnnn,%rsp */
2414 if (pc[0] == 0x48 && pc[2] == 0xc4)
2415 {
2416 pc += 7;
2417 break;
2418 }
2419 return FALSE;
2420 case 0x83: /* add $n,%rsp */
2421 if (pc[0] == 0x48 && pc[2] == 0xc4)
2422 {
2423 pc += 4;
2424 break;
2425 }
2426 return FALSE;
2427 case 0x8d: /* lea n(reg),%rsp */
2428 if (pc[0] & 0x06) return FALSE; /* rex.RX must be cleared */
2429 if (((pc[2] >> 3) & 7) != 4) return FALSE; /* dest reg mus be %rsp */
2430 if ((pc[2] & 7) == 4) return FALSE; /* no SIB byte allowed */
2431 if ((pc[2] >> 6) == 1) /* 8-bit offset */
2432 {
2433 pc += 4;
2434 break;
2435 }
2436 if ((pc[2] >> 6) == 2) /* 32-bit offset */
2437 {
2438 pc += 7;
2439 break;
2440 }
2441 return FALSE;
2442 }
2443 }
2444
2445 /* now check for various pop instructions */
2446
2447 for (;;)
2448 {
2449 BYTE rex = 0;
2450
2451 if ((*pc & 0xf0) == 0x40) rex = *pc++ & 0x0f; /* rex prefix */
2452
2453 switch (*pc)
2454 {
2455 case 0x58: /* pop %rax/%r8 */
2456 case 0x59: /* pop %rcx/%r9 */
2457 case 0x5a: /* pop %rdx/%r10 */
2458 case 0x5b: /* pop %rbx/%r11 */
2459 case 0x5c: /* pop %rsp/%r12 */
2460 case 0x5d: /* pop %rbp/%r13 */
2461 case 0x5e: /* pop %rsi/%r14 */
2462 case 0x5f: /* pop %rdi/%r15 */
2463 pc++;
2464 continue;
2465 case 0xc2: /* ret $nn */
2466 case 0xc3: /* ret */
2467 return TRUE;
2468 /* FIXME: add various jump instructions */
2469 }
2470 return FALSE;
2471 }
2472 }
2473
2474 /* execute a function epilog, which must have been validated with is_inside_epilog() */
2475 static void interpret_epilog( BYTE *pc, CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
2476 {
2477 for (;;)
2478 {
2479 BYTE rex = 0;
2480
2481 if ((*pc & 0xf0) == 0x40) rex = *pc++ & 0x0f; /* rex prefix */
2482
2483 switch (*pc)
2484 {
2485 case 0x58: /* pop %rax/r8 */
2486 case 0x59: /* pop %rcx/r9 */
2487 case 0x5a: /* pop %rdx/r10 */
2488 case 0x5b: /* pop %rbx/r11 */
2489 case 0x5c: /* pop %rsp/r12 */
2490 case 0x5d: /* pop %rbp/r13 */
2491 case 0x5e: /* pop %rsi/r14 */
2492 case 0x5f: /* pop %rdi/r15 */
2493 set_int_reg( context, ctx_ptr, *pc - 0x58 + (rex & 1) * 8, *(ULONG64 *)context->Rsp );
2494 context->Rsp += sizeof(ULONG64);
2495 pc++;
2496 continue;
2497 case 0x81: /* add $nnnn,%rsp */
2498 context->Rsp += *(LONG *)(pc + 2);
2499 pc += 2 + sizeof(LONG);
2500 continue;
2501 case 0x83: /* add $n,%rsp */
2502 context->Rsp += (signed char)pc[2];
2503 pc += 3;
2504 continue;
2505 case 0x8d:
2506 if ((pc[1] >> 6) == 1) /* lea n(reg),%rsp */
2507 {
2508 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + (signed char)pc[2];
2509 pc += 3;
2510 }
2511 else /* lea nnnn(reg),%rsp */
2512 {
2513 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + *(LONG *)(pc + 2);
2514 pc += 2 + sizeof(LONG);
2515 }
2516 continue;
2517 case 0xc2: /* ret $nn */
2518 context->Rip = *(ULONG64 *)context->Rsp;
2519 context->Rsp += sizeof(ULONG64) + *(WORD *)(pc + 1);
2520 return;
2521 case 0xc3: /* ret */
2522 context->Rip = *(ULONG64 *)context->Rsp;
2523 context->Rsp += sizeof(ULONG64);
2524 return;
2525 /* FIXME: add various jump instructions */
2526 }
2527 return;
2528 }
2529 }
2530
2531 /**********************************************************************
2532 * RtlVirtualUnwind (NTDLL.@)
2533 */
2534 PVOID WINAPI RtlVirtualUnwind( ULONG type, ULONG64 base, ULONG64 pc,
2535 RUNTIME_FUNCTION *function, CONTEXT *context,
2536 PVOID *data, ULONG64 *frame_ret,
2537 KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
2538 {
2539 union handler_data *handler_data;
2540 ULONG64 frame, off;
2541 struct UNWIND_INFO *info;
2542 unsigned int i, prolog_offset;
2543
2544 TRACE( "type %x rip %lx rsp %lx\n", type, pc, context->Rsp );
2545 if (TRACE_ON(seh)) dump_unwind_info( base, function );
2546
2547 frame = *frame_ret = context->Rsp;
2548 for (;;)
2549 {
2550 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
2551 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
2552
2553 if (info->version != 1)
2554 {
2555 FIXME( "unknown unwind info version %u at %p\n", info->version, info );
2556 return NULL;
2557 }
2558
2559 if (info->frame_reg)
2560 frame = get_int_reg( context, info->frame_reg ) - info->frame_offset * 16;
2561
2562 /* check if in prolog */
2563 if (pc >= base + function->BeginAddress && pc < base + function->BeginAddress + info->prolog)
2564 {
2565 prolog_offset = pc - base - function->BeginAddress;
2566 }
2567 else
2568 {
2569 prolog_offset = ~0;
2570 if (is_inside_epilog( (BYTE *)pc ))
2571 {
2572 interpret_epilog( (BYTE *)pc, context, ctx_ptr );
2573 *frame_ret = frame;
2574 return NULL;
2575 }
2576 }
2577
2578 for (i = 0; i < info->count; i += get_opcode_size(info->opcodes[i]))
2579 {
2580 if (prolog_offset < info->opcodes[i].offset) continue; /* skip it */
2581
2582 switch (info->opcodes[i].code)
2583 {
2584 case UWOP_PUSH_NONVOL: /* pushq %reg */
2585 set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)context->Rsp );
2586 context->Rsp += sizeof(ULONG64);
2587 break;
2588 case UWOP_ALLOC_LARGE: /* subq $nn,%rsp */
2589 if (info->opcodes[i].info) context->Rsp += *(DWORD *)&info->opcodes[i+1];
2590 else context->Rsp += *(USHORT *)&info->opcodes[i+1] * 8;
2591 break;
2592 case UWOP_ALLOC_SMALL: /* subq $n,%rsp */
2593 context->Rsp += (info->opcodes[i].info + 1) * 8;
2594 break;
2595 case UWOP_SET_FPREG: /* leaq nn(%rsp),%framereg */
2596 context->Rsp = *frame_ret = frame;
2597 break;
2598 case UWOP_SAVE_NONVOL: /* movq %reg,n(%rsp) */
2599 off = frame + *(USHORT *)&info->opcodes[i+1] * 8;
2600 set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)off );
2601 break;
2602 case UWOP_SAVE_NONVOL_FAR: /* movq %reg,nn(%rsp) */
2603 off = frame + *(DWORD *)&info->opcodes[i+1];
2604 set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)off );
2605 break;
2606 case UWOP_SAVE_XMM128: /* movaps %xmmreg,n(%rsp) */
2607 off = frame + *(USHORT *)&info->opcodes[i+1] * 16;
2608 set_float_reg( context, ctx_ptr, info->opcodes[i].info, *(M128A *)off );
2609 break;
2610 case UWOP_SAVE_XMM128_FAR: /* movaps %xmmreg,nn(%rsp) */
2611 off = frame + *(DWORD *)&info->opcodes[i+1];
2612 set_float_reg( context, ctx_ptr, info->opcodes[i].info, *(M128A *)off );
2613 break;
2614 case UWOP_PUSH_MACHFRAME:
2615 FIXME( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
2616 break;
2617 default:
2618 FIXME( "unknown code %u\n", info->opcodes[i].code );
2619 break;
2620 }
2621 }
2622
2623 if (!(info->flags & UNW_FLAG_CHAININFO)) break;
2624 function = &handler_data->chain; /* restart with the chained info */
2625 }
2626
2627 /* now pop return address */
2628 context->Rip = *(ULONG64 *)context->Rsp;
2629 context->Rsp += sizeof(ULONG64);
2630
2631 if (!(info->flags & type)) return NULL; /* no matching handler */
2632 if (prolog_offset != ~0) return NULL; /* inside prolog */
2633
2634 *data = &handler_data->handler + 1;
2635 return (char *)base + handler_data->handler;
2636 }
2637
2638
2639 /**********************************************************************
2640 * call_unwind_handler
2641 *
2642 * Call a single unwind handler.
2643 * FIXME: Handle nested exceptions.
2644 */
2645 static void call_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch )
2646 {
2647 DWORD res;
2648
2649 dispatch->ControlPc = dispatch->ContextRecord->Rip;
2650
2651 TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
2652 dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
2653 res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
2654 TRACE( "handler %p returned %x\n", dispatch->LanguageHandler, res );
2655
2656 switch (res)
2657 {
2658 case ExceptionContinueSearch:
2659 break;
2660 case ExceptionCollidedUnwind:
2661 FIXME( "ExceptionCollidedUnwind not supported yet\n" );
2662 break;
2663 default:
2664 raise_status( STATUS_INVALID_DISPOSITION, rec );
2665 break;
2666 }
2667 }
2668
2669
2670 /**********************************************************************
2671 * call_teb_unwind_handler
2672 *
2673 * Call a single unwind handler from the TEB chain.
2674 * FIXME: Handle nested exceptions.
2675 */
2676 static void call_teb_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
2677 EXCEPTION_REGISTRATION_RECORD *teb_frame )
2678 {
2679 EXCEPTION_REGISTRATION_RECORD *dispatcher;
2680 DWORD res;
2681
2682 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatcher=%p)\n",
2683 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, &dispatcher );
2684 res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, &dispatcher );
2685 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
2686
2687 switch (res)
2688 {
2689 case ExceptionContinueSearch:
2690 break;
2691 case ExceptionCollidedUnwind:
2692 FIXME( "ExceptionCollidedUnwind not supported yet\n" );
2693 break;
2694 default:
2695 raise_status( STATUS_INVALID_DISPOSITION, rec );
2696 break;
2697 }
2698 }
2699
2700
2701 /*******************************************************************
2702 * RtlUnwindEx (NTDLL.@)
2703 */
2704 void WINAPI RtlUnwindEx( ULONG64 end_frame, ULONG64 target_ip, EXCEPTION_RECORD *rec,
2705 ULONG64 retval, CONTEXT *orig_context, UNWIND_HISTORY_TABLE *table )
2706 {
2707 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
2708 EXCEPTION_RECORD record;
2709 DISPATCHER_CONTEXT dispatch;
2710 CONTEXT context, new_context;
2711 LDR_MODULE *module;
2712 NTSTATUS status;
2713 DWORD size;
2714
2715 /* build an exception record, if we do not have one */
2716 if (!rec)
2717 {
2718 record.ExceptionCode = STATUS_UNWIND;
2719 record.ExceptionFlags = 0;
2720 record.ExceptionRecord = NULL;
2721 record.ExceptionAddress = (void *)orig_context->Rip;
2722 record.NumberParameters = 0;
2723 rec = &record;
2724 }
2725
2726 rec->ExceptionFlags |= EH_UNWINDING | (end_frame ? 0 : EH_EXIT_UNWIND);
2727
2728 TRACE( "code=%x flags=%x end_frame=%lx target_ip=%lx rip=%016lx\n",
2729 rec->ExceptionCode, rec->ExceptionFlags, end_frame, target_ip, orig_context->Rip );
2730 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
2731 orig_context->Rax, orig_context->Rbx, orig_context->Rcx, orig_context->Rdx );
2732 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
2733 orig_context->Rsi, orig_context->Rdi, orig_context->Rbp, orig_context->Rsp );
2734 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
2735 orig_context->R8, orig_context->R9, orig_context->R10, orig_context->R11 );
2736 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
2737 orig_context->R12, orig_context->R13, orig_context->R14, orig_context->R15 );
2738
2739 context = *orig_context;
2740 dispatch.EstablisherFrame = context.Rsp;
2741 dispatch.TargetIp = target_ip;
2742 dispatch.ContextRecord = &context;
2743 dispatch.HistoryTable = table;
2744
2745 while (dispatch.EstablisherFrame != end_frame)
2746 {
2747 new_context = context;
2748
2749 /* FIXME: should use the history table to make things faster */
2750
2751 module = NULL;
2752 dispatch.ImageBase = 0;
2753 dispatch.ScopeIndex = 0; /* FIXME */
2754
2755 /* first look for PE exception information */
2756
2757 if (!LdrFindEntryForAddress( (void *)context.Rip, &module ))
2758 {
2759 RUNTIME_FUNCTION *dir;
2760
2761 dispatch.ImageBase = (ULONG64)module->BaseAddress;
2762 if ((dir = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE,
2763 IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )))
2764 {
2765 if ((dispatch.FunctionEntry = find_function_info( context.Rip, module->BaseAddress,
2766 dir, size )))
2767 {
2768 dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_UHANDLER, dispatch.ImageBase,
2769 context.Rip, dispatch.FunctionEntry,
2770 &new_context, &dispatch.HandlerData,
2771 &dispatch.EstablisherFrame, NULL );
2772 goto unwind_done;
2773 }
2774 }
2775 else if (!(module->Flags & LDR_WINE_INTERNAL))
2776 WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
2777 }
2778
2779 /* then look for host system exception information */
2780
2781 if (!module || (module->Flags & LDR_WINE_INTERNAL))
2782 {
2783 struct dwarf_eh_bases bases;
2784 const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context.Rip - 1), &bases );
2785
2786 if (fde)
2787 {
2788 dispatch.FunctionEntry = NULL;
2789 status = dwarf_virtual_unwind( context.Rip, &dispatch.EstablisherFrame, &new_context, fde,
2790 &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
2791 if (status != STATUS_SUCCESS) raise_status( status, rec );
2792 if (dispatch.LanguageHandler && !module)
2793 {
2794 FIXME( "calling personality routine in system library not supported yet\n" );
2795 dispatch.LanguageHandler = NULL;
2796 }
2797 goto unwind_done;
2798 }
2799 }
2800
2801 /* no exception information, treat as a leaf function */
2802
2803 new_context.Rip = *(ULONG64 *)context.Rsp;
2804 new_context.Rsp = context.Rsp + sizeof(ULONG64);
2805 dispatch.EstablisherFrame = new_context.Rsp;
2806 dispatch.LanguageHandler = NULL;
2807
2808 unwind_done:
2809 if (!dispatch.EstablisherFrame) break;
2810
2811 if (is_inside_signal_stack( (void *)dispatch.EstablisherFrame ))
2812 {
2813 TRACE( "frame %lx is inside signal stack (%p-%p)\n", dispatch.EstablisherFrame,
2814 get_signal_stack(), (char *)get_signal_stack() + signal_stack_size );
2815 context = new_context;
2816 continue;
2817 }
2818
2819 if ((dispatch.EstablisherFrame & 7) ||
2820 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
2821 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
2822 {
2823 ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
2824 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2825 rec->ExceptionFlags |= EH_STACK_INVALID;
2826 break;
2827 }
2828
2829 if (dispatch.LanguageHandler)
2830 {
2831 if (end_frame && (dispatch.EstablisherFrame > end_frame))
2832 {
2833 ERR( "invalid end frame %lx/%lx\n", dispatch.EstablisherFrame, end_frame );
2834 raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
2835 }
2836 call_unwind_handler( rec, &dispatch );
2837 }
2838 else /* hack: call builtin handlers registered in the tib list */
2839 {
2840 while ((ULONG64)teb_frame < new_context.Rsp && (ULONG64)teb_frame < end_frame)
2841 {
2842 TRACE( "found builtin frame %p handler %p\n", teb_frame, teb_frame->Handler );
2843 dispatch.EstablisherFrame = (ULONG64)teb_frame;
2844 call_teb_unwind_handler( rec, &dispatch, teb_frame );
2845 teb_frame = __wine_pop_frame( teb_frame );
2846 }
2847 if ((ULONG64)teb_frame == end_frame && end_frame < new_context.Rsp) break;
2848 dispatch.EstablisherFrame = new_context.Rsp;
2849 }
2850
2851 context = new_context;
2852 }
2853 context.Rax = retval;
2854 context.Rip = target_ip;
2855 TRACE( "returning to %lx stack %lx\n", context.Rip, context.Rsp );
2856 set_cpu_context( &context );
2857 }
2858
2859
2860 /*******************************************************************
2861 * RtlUnwind (NTDLL.@)
2862 */
2863 void WINAPI __regs_RtlUnwind( ULONG64 frame, ULONG64 target_ip, EXCEPTION_RECORD *rec,
2864 ULONG64 retval, CONTEXT *context )
2865 {
2866 RtlUnwindEx( frame, target_ip, rec, retval, context, NULL );
2867 }
2868 DEFINE_REGS_ENTRYPOINT( RtlUnwind, 4 )
2869
2870
2871 /*******************************************************************
2872 * __C_specific_handler (NTDLL.@)
2873 */
2874 EXCEPTION_DISPOSITION WINAPI __C_specific_handler( EXCEPTION_RECORD *rec,
2875 ULONG64 frame,
2876 CONTEXT *context,
2877 struct _DISPATCHER_CONTEXT *dispatch )
2878 {
2879 SCOPE_TABLE *table = dispatch->HandlerData;
2880 ULONG i;
2881
2882 TRACE( "%p %lx %p %p\n", rec, frame, context, dispatch );
2883 if (TRACE_ON(seh)) dump_scope_table( dispatch->ImageBase, table );
2884
2885 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) /* FIXME */
2886 return ExceptionContinueSearch;
2887
2888 for (i = 0; i < table->Count; i++)
2889 {
2890 if (context->Rip >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
2891 context->Rip < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
2892 {
2893 if (!table->ScopeRecord[i].JumpTarget) continue;
2894 if (table->ScopeRecord[i].HandlerAddress != EXCEPTION_EXECUTE_HANDLER)
2895 {
2896 EXCEPTION_POINTERS ptrs;
2897 PC_LANGUAGE_EXCEPTION_HANDLER filter;
2898
2899 filter = (PC_LANGUAGE_EXCEPTION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
2900 ptrs.ExceptionRecord = rec;
2901 ptrs.ContextRecord = context;
2902 TRACE( "calling filter %p ptrs %p frame %lx\n", filter, &ptrs, frame );
2903 switch (filter( &ptrs, frame ))
2904 {
2905 case EXCEPTION_EXECUTE_HANDLER:
2906 break;
2907 case EXCEPTION_CONTINUE_SEARCH:
2908 continue;
2909 case EXCEPTION_CONTINUE_EXECUTION:
2910 return ExceptionContinueExecution;
2911 }
2912 }
2913 TRACE( "unwinding to target %lx\n", dispatch->ImageBase + table->ScopeRecord[i].JumpTarget );
2914 RtlUnwindEx( frame, dispatch->ImageBase + table->ScopeRecord[i].JumpTarget,
2915 rec, 0, context, dispatch->HistoryTable );
2916 }
2917 }
2918 return ExceptionContinueSearch;
2919 }
2920
2921
2922 /*******************************************************************
2923 * NtRaiseException (NTDLL.@)
2924 */
2925 NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
2926 {
2927 NTSTATUS status = raise_exception( rec, context, first_chance );
2928 if (status == STATUS_SUCCESS) NtSetContextThread( GetCurrentThread(), context );
2929 return status;
2930 }
2931
2932
2933 /***********************************************************************
2934 * RtlRaiseException (NTDLL.@)
2935 */
2936 void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
2937 {
2938 NTSTATUS status;
2939
2940 rec->ExceptionAddress = (void *)context->Rip;
2941 status = raise_exception( rec, context, TRUE );
2942 if (status != STATUS_SUCCESS) raise_status( status, rec );
2943 }
2944 DEFINE_REGS_ENTRYPOINT( RtlRaiseException, 1 )
2945
2946
2947 /*************************************************************************
2948 * RtlCaptureStackBackTrace (NTDLL.@)
2949 */
2950 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
2951 {
2952 FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash );
2953 return 0;
2954 }
2955
2956
2957 /***********************************************************************
2958 * call_thread_func
2959 */
2960 void call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg, void *frame )
2961 {
2962 ntdll_get_thread_data()->exit_frame = frame;
2963 __TRY
2964 {
2965 RtlExitUserThread( entry( arg ));
2966 }
2967 __EXCEPT(unhandled_exception_filter)
2968 {
2969 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
2970 }
2971 __ENDTRY
2972 abort(); /* should not be reached */
2973 }
2974
2975 extern void DECLSPEC_NORETURN call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg );
2976 __ASM_GLOBAL_FUNC( call_thread_entry_point,
2977 "subq $8,%rsp\n\t"
2978 ".cfi_adjust_cfa_offset 8\n\t"
2979 "movq %rsp,%rdx\n\t"
2980 "call " __ASM_NAME("call_thread_func") );
2981
2982 extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), void *frame );
2983 __ASM_GLOBAL_FUNC( call_thread_exit_func,
2984 "subq $8,%rsp\n\t"
2985 ".cfi_adjust_cfa_offset 8\n\t"
2986 "movq %rdx,%rsp\n\t"
2987 "call *%rsi" );
2988
2989 /***********************************************************************
2990 * RtlExitUserThread (NTDLL.@)
2991 */
2992 void WINAPI RtlExitUserThread( ULONG status )
2993 {
2994 if (!ntdll_get_thread_data()->exit_frame) exit_thread( status );
2995 call_thread_exit_func( status, exit_thread, ntdll_get_thread_data()->exit_frame );
2996 }
2997
2998 /***********************************************************************
2999 * abort_thread
3000 */
3001 void abort_thread( int status )
3002 {
3003 if (!ntdll_get_thread_data()->exit_frame) terminate_thread( status );
3004 call_thread_exit_func( status, terminate_thread, ntdll_get_thread_data()->exit_frame );
3005 }
3006
3007 /**********************************************************************
3008 * __wine_enter_vm86 (NTDLL.@)
3009 */
3010 void __wine_enter_vm86( CONTEXT *context )
3011 {
3012 MESSAGE("vm86 mode not supported on this platform\n");
3013 }
3014
3015 /**********************************************************************
3016 * DbgBreakPoint (NTDLL.@)
3017 */
3018 __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret")
3019
3020 /**********************************************************************
3021 * DbgUserBreakPoint (NTDLL.@)
3022 */
3023 __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret")
3024
3025 #endif /* __x86_64__ */
Windows API implementation