?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
kernel32: DETACHED_PROCESS doesn't affect STARTUPINFO console handles.
[wine.git] / dlls / ntdll / signal_x86_64.c
blobf33fe4cbfd62924951bdaf2e7ef1eafa8197d180
1 /*
2 * x86-64 signal handling routines
3 *
4 * Copyright 1999, 2005 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #ifdef __x86_64__
22
23 #include "config.h"
24 #include "wine/port.h"
25
26 #include <assert.h>
27 #include <signal.h>
28 #include <stdlib.h>
29 #include <stdarg.h>
30 #include <stdio.h>
31 #include <sys/types.h>
32 #ifdef HAVE_UNISTD_H
33 # include <unistd.h>
34 #endif
35 #ifdef HAVE_MACHINE_SYSARCH_H
36 # include <machine/sysarch.h>
37 #endif
38 #ifdef HAVE_SYS_PARAM_H
39 # include <sys/param.h>
40 #endif
41 #ifdef HAVE_SYSCALL_H
42 # include <syscall.h>
43 #else
44 # ifdef HAVE_SYS_SYSCALL_H
45 # include <sys/syscall.h>
46 # endif
47 #endif
48 #ifdef HAVE_SYS_SIGNAL_H
49 # include <sys/signal.h>
50 #endif
51 #ifdef HAVE_SYS_UCONTEXT_H
52 # include <sys/ucontext.h>
53 #endif
54 #ifdef HAVE_LIBUNWIND_H
55 # define UNW_LOCAL_ONLY
56 # include <libunwind.h>
57 #endif
58
59 #define NONAMELESSUNION
60 #define NONAMELESSSTRUCT
61 #include "ntstatus.h"
62 #define WIN32_NO_STATUS
63 #include "windef.h"
64 #include "winternl.h"
65 #include "wine/library.h"
66 #include "wine/exception.h"
67 #include "wine/list.h"
68 #include "ntdll_misc.h"
69 #include "wine/debug.h"
70
71 #ifdef HAVE_VALGRIND_MEMCHECK_H
72 #include <valgrind/memcheck.h>
73 #endif
74
75 WINE_DEFAULT_DEBUG_CHANNEL(seh);
76
77 struct _DISPATCHER_CONTEXT;
78
79 typedef LONG (WINAPI *PC_LANGUAGE_EXCEPTION_HANDLER)( EXCEPTION_POINTERS *ptrs, ULONG64 frame );
80 typedef EXCEPTION_DISPOSITION (WINAPI *PEXCEPTION_ROUTINE)( EXCEPTION_RECORD *rec,
81 ULONG64 frame,
82 CONTEXT *context,
83 struct _DISPATCHER_CONTEXT *dispatch );
84 typedef void (WINAPI *TERMINATION_HANDLER)( ULONG flags, ULONG64 frame );
85
86 typedef struct _DISPATCHER_CONTEXT
87 {
88 ULONG64 ControlPc;
89 ULONG64 ImageBase;
90 PRUNTIME_FUNCTION FunctionEntry;
91 ULONG64 EstablisherFrame;
92 ULONG64 TargetIp;
93 PCONTEXT ContextRecord;
94 PEXCEPTION_ROUTINE LanguageHandler;
95 PVOID HandlerData;
96 PUNWIND_HISTORY_TABLE HistoryTable;
97 ULONG ScopeIndex;
98 } DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT;
99
100 typedef struct _SCOPE_TABLE
101 {
102 ULONG Count;
103 struct
104 {
105 ULONG BeginAddress;
106 ULONG EndAddress;
107 ULONG HandlerAddress;
108 ULONG JumpTarget;
109 } ScopeRecord[1];
110 } SCOPE_TABLE, *PSCOPE_TABLE;
111
112
113 /* layering violation: the setjmp buffer is defined in msvcrt, but used by RtlUnwindEx */
114 struct MSVCRT_JUMP_BUFFER
115 {
116 ULONG64 Frame;
117 ULONG64 Rbx;
118 ULONG64 Rsp;
119 ULONG64 Rbp;
120 ULONG64 Rsi;
121 ULONG64 Rdi;
122 ULONG64 R12;
123 ULONG64 R13;
124 ULONG64 R14;
125 ULONG64 R15;
126 ULONG64 Rip;
127 ULONG64 Spare;
128 M128A Xmm6;
129 M128A Xmm7;
130 M128A Xmm8;
131 M128A Xmm9;
132 M128A Xmm10;
133 M128A Xmm11;
134 M128A Xmm12;
135 M128A Xmm13;
136 M128A Xmm14;
137 M128A Xmm15;
138 };
139
140 /***********************************************************************
141 * signal context platform-specific definitions
142 */
143 #ifdef linux
144
145 #include <asm/prctl.h>
146 static inline int arch_prctl( int func, void *ptr ) { return syscall( __NR_arch_prctl, func, ptr ); }
147
148 #define RAX_sig(context) ((context)->uc_mcontext.gregs[REG_RAX])
149 #define RBX_sig(context) ((context)->uc_mcontext.gregs[REG_RBX])
150 #define RCX_sig(context) ((context)->uc_mcontext.gregs[REG_RCX])
151 #define RDX_sig(context) ((context)->uc_mcontext.gregs[REG_RDX])
152 #define RSI_sig(context) ((context)->uc_mcontext.gregs[REG_RSI])
153 #define RDI_sig(context) ((context)->uc_mcontext.gregs[REG_RDI])
154 #define RBP_sig(context) ((context)->uc_mcontext.gregs[REG_RBP])
155 #define R8_sig(context) ((context)->uc_mcontext.gregs[REG_R8])
156 #define R9_sig(context) ((context)->uc_mcontext.gregs[REG_R9])
157 #define R10_sig(context) ((context)->uc_mcontext.gregs[REG_R10])
158 #define R11_sig(context) ((context)->uc_mcontext.gregs[REG_R11])
159 #define R12_sig(context) ((context)->uc_mcontext.gregs[REG_R12])
160 #define R13_sig(context) ((context)->uc_mcontext.gregs[REG_R13])
161 #define R14_sig(context) ((context)->uc_mcontext.gregs[REG_R14])
162 #define R15_sig(context) ((context)->uc_mcontext.gregs[REG_R15])
163
164 #define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0))
165 #define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1))
166 #define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2))
167
168 #define RSP_sig(context) ((context)->uc_mcontext.gregs[REG_RSP])
169 #define RIP_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
170 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
171 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
172 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
173
174 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.fpregs))
175
176 #elif defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
177
178 #define RAX_sig(context) ((context)->uc_mcontext.mc_rax)
179 #define RBX_sig(context) ((context)->uc_mcontext.mc_rbx)
180 #define RCX_sig(context) ((context)->uc_mcontext.mc_rcx)
181 #define RDX_sig(context) ((context)->uc_mcontext.mc_rdx)
182 #define RSI_sig(context) ((context)->uc_mcontext.mc_rsi)
183 #define RDI_sig(context) ((context)->uc_mcontext.mc_rdi)
184 #define RBP_sig(context) ((context)->uc_mcontext.mc_rbp)
185 #define R8_sig(context) ((context)->uc_mcontext.mc_r8)
186 #define R9_sig(context) ((context)->uc_mcontext.mc_r9)
187 #define R10_sig(context) ((context)->uc_mcontext.mc_r10)
188 #define R11_sig(context) ((context)->uc_mcontext.mc_r11)
189 #define R12_sig(context) ((context)->uc_mcontext.mc_r12)
190 #define R13_sig(context) ((context)->uc_mcontext.mc_r13)
191 #define R14_sig(context) ((context)->uc_mcontext.mc_r14)
192 #define R15_sig(context) ((context)->uc_mcontext.mc_r15)
193
194 #define CS_sig(context) ((context)->uc_mcontext.mc_cs)
195 #define DS_sig(context) ((context)->uc_mcontext.mc_ds)
196 #define ES_sig(context) ((context)->uc_mcontext.mc_es)
197 #define FS_sig(context) ((context)->uc_mcontext.mc_fs)
198 #define GS_sig(context) ((context)->uc_mcontext.mc_gs)
199 #define SS_sig(context) ((context)->uc_mcontext.mc_ss)
200
201 #define EFL_sig(context) ((context)->uc_mcontext.mc_rflags)
202
203 #define RIP_sig(context) ((context)->uc_mcontext.mc_rip)
204 #define RSP_sig(context) ((context)->uc_mcontext.mc_rsp)
205 #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
206 #define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
207
208 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.mc_fpstate))
209
210 #elif defined(__NetBSD__)
211
212 #define RAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RAX])
213 #define RBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBX])
214 #define RCX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RCX])
215 #define RDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDX])
216 #define RSI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RSI])
217 #define RDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDI])
218 #define RBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBP])
219 #define R8_sig(context) ((context)->uc_mcontext.__gregs[_REG_R8])
220 #define R9_sig(context) ((context)->uc_mcontext.__gregs[_REG_R9])
221 #define R10_sig(context) ((context)->uc_mcontext.__gregs[_REG_R10])
222 #define R11_sig(context) ((context)->uc_mcontext.__gregs[_REG_R11])
223 #define R12_sig(context) ((context)->uc_mcontext.__gregs[_REG_R12])
224 #define R13_sig(context) ((context)->uc_mcontext.__gregs[_REG_R13])
225 #define R14_sig(context) ((context)->uc_mcontext.__gregs[_REG_R14])
226 #define R15_sig(context) ((context)->uc_mcontext.__gregs[_REG_R15])
227
228 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
229 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
230 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
231 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
232 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
233 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
234
235 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_RFL])
236
237 #define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_RIP]))
238 #define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_URSP]))
239
240 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
241 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
242
243 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.__fpregs))
244 #elif defined (__APPLE__)
245 #define RAX_sig(context) ((context)->uc_mcontext->__ss.__rax)
246 #define RBX_sig(context) ((context)->uc_mcontext->__ss.__rbx)
247 #define RCX_sig(context) ((context)->uc_mcontext->__ss.__rcx)
248 #define RDX_sig(context) ((context)->uc_mcontext->__ss.__rdx)
249 #define RSI_sig(context) ((context)->uc_mcontext->__ss.__rsi)
250 #define RDI_sig(context) ((context)->uc_mcontext->__ss.__rdi)
251 #define RBP_sig(context) ((context)->uc_mcontext->__ss.__rbp)
252 #define R8_sig(context) ((context)->uc_mcontext->__ss.__r8)
253 #define R9_sig(context) ((context)->uc_mcontext->__ss.__r9)
254 #define R10_sig(context) ((context)->uc_mcontext->__ss.__r10)
255 #define R11_sig(context) ((context)->uc_mcontext->__ss.__r11)
256 #define R12_sig(context) ((context)->uc_mcontext->__ss.__r12)
257 #define R13_sig(context) ((context)->uc_mcontext->__ss.__r13)
258 #define R14_sig(context) ((context)->uc_mcontext->__ss.__r14)
259 #define R15_sig(context) ((context)->uc_mcontext->__ss.__r15)
260
261 #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
262 #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
263 #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
264
265 #define EFL_sig(context) ((context)->uc_mcontext->__ss.__rflags)
266
267 #define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rip))
268 #define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rsp))
269
270 #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
271 #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
272
273 #define FPU_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
274
275 #else
276 #error You must define the signal context functions for your platform
277 #endif
278
279 enum i386_trap_code
280 {
281 TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
282 TRAP_x86_DIVIDE = 0, /* Division by zero exception */
283 TRAP_x86_TRCTRAP = 1, /* Single-step exception */
284 TRAP_x86_NMI = 2, /* NMI interrupt */
285 TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
286 TRAP_x86_OFLOW = 4, /* Overflow exception */
287 TRAP_x86_BOUND = 5, /* Bound range exception */
288 TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
289 TRAP_x86_DNA = 7, /* Device not available exception */
290 TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
291 TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
292 TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
293 TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
294 TRAP_x86_STKFLT = 12, /* Stack fault */
295 TRAP_x86_PROTFLT = 13, /* General protection fault */
296 TRAP_x86_PAGEFLT = 14, /* Page fault */
297 TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
298 TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
299 TRAP_x86_MCHK = 18, /* Machine check exception */
300 TRAP_x86_CACHEFLT = 19 /* Cache flush exception */
301 };
302
303 static const size_t teb_size = 0x2000; /* we reserve two pages for the TEB */
304 static size_t signal_stack_size;
305
306 typedef void (*raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
307 typedef int (*wine_signal_handler)(unsigned int sig);
308
309 static wine_signal_handler handlers[256];
310
311 /***********************************************************************
312 * Dynamic unwind table
313 */
314
315 struct dynamic_unwind_entry
316 {
317 struct list entry;
318
319 /* memory region which matches this entry */
320 DWORD64 base;
321 DWORD size;
322
323 /* lookup table */
324 RUNTIME_FUNCTION *table;
325 DWORD table_size;
326
327 /* user defined callback */
328 PGET_RUNTIME_FUNCTION_CALLBACK callback;
329 PVOID context;
330 };
331
332 static struct list dynamic_unwind_list = LIST_INIT(dynamic_unwind_list);
333
334 static RTL_CRITICAL_SECTION dynamic_unwind_section;
335 static RTL_CRITICAL_SECTION_DEBUG dynamic_unwind_debug =
336 {
337 0, 0, &dynamic_unwind_section,
338 { &dynamic_unwind_debug.ProcessLocksList, &dynamic_unwind_debug.ProcessLocksList },
339 0, 0, { (DWORD_PTR)(__FILE__ ": dynamic_unwind_section") }
340 };
341 static RTL_CRITICAL_SECTION dynamic_unwind_section = { &dynamic_unwind_debug, -1, 0, 0, 0, 0 };
342
343 /***********************************************************************
344 * Definitions for Win32 unwind tables
345 */
346
347 union handler_data
348 {
349 RUNTIME_FUNCTION chain;
350 ULONG handler;
351 };
352
353 struct opcode
354 {
355 BYTE offset;
356 BYTE code : 4;
357 BYTE info : 4;
358 };
359
360 struct UNWIND_INFO
361 {
362 BYTE version : 3;
363 BYTE flags : 5;
364 BYTE prolog;
365 BYTE count;
366 BYTE frame_reg : 4;
367 BYTE frame_offset : 4;
368 struct opcode opcodes[1]; /* info->count entries */
369 /* followed by handler_data */
370 };
371
372 #define UWOP_PUSH_NONVOL 0
373 #define UWOP_ALLOC_LARGE 1
374 #define UWOP_ALLOC_SMALL 2
375 #define UWOP_SET_FPREG 3
376 #define UWOP_SAVE_NONVOL 4
377 #define UWOP_SAVE_NONVOL_FAR 5
378 #define UWOP_SAVE_XMM128 8
379 #define UWOP_SAVE_XMM128_FAR 9
380 #define UWOP_PUSH_MACHFRAME 10
381
382 static void dump_unwind_info( ULONG64 base, RUNTIME_FUNCTION *function )
383 {
384 static const char * const reg_names[16] =
385 { "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
386 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" };
387
388 union handler_data *handler_data;
389 struct UNWIND_INFO *info;
390 unsigned int i, count;
391
392 TRACE( "**** func %x-%x\n", function->BeginAddress, function->EndAddress );
393 for (;;)
394 {
395 if (function->UnwindData & 1)
396 {
397 RUNTIME_FUNCTION *next = (RUNTIME_FUNCTION *)((char *)base + (function->UnwindData & ~1));
398 TRACE( "unwind info for function %p-%p chained to function %p-%p\n",
399 (char *)base + function->BeginAddress, (char *)base + function->EndAddress,
400 (char *)base + next->BeginAddress, (char *)base + next->EndAddress );
401 function = next;
402 continue;
403 }
404 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
405
406 TRACE( "unwind info at %p flags %x prolog 0x%x bytes function %p-%p\n",
407 info, info->flags, info->prolog,
408 (char *)base + function->BeginAddress, (char *)base + function->EndAddress );
409
410 if (info->frame_reg)
411 TRACE( " frame register %s offset 0x%x(%%rsp)\n",
412 reg_names[info->frame_reg], info->frame_offset * 16 );
413
414 for (i = 0; i < info->count; i++)
415 {
416 TRACE( " 0x%x: ", info->opcodes[i].offset );
417 switch (info->opcodes[i].code)
418 {
419 case UWOP_PUSH_NONVOL:
420 TRACE( "pushq %%%s\n", reg_names[info->opcodes[i].info] );
421 break;
422 case UWOP_ALLOC_LARGE:
423 if (info->opcodes[i].info)
424 {
425 count = *(DWORD *)&info->opcodes[i+1];
426 i += 2;
427 }
428 else
429 {
430 count = *(USHORT *)&info->opcodes[i+1] * 8;
431 i++;
432 }
433 TRACE( "subq $0x%x,%%rsp\n", count );
434 break;
435 case UWOP_ALLOC_SMALL:
436 count = (info->opcodes[i].info + 1) * 8;
437 TRACE( "subq $0x%x,%%rsp\n", count );
438 break;
439 case UWOP_SET_FPREG:
440 TRACE( "leaq 0x%x(%%rsp),%s\n",
441 info->frame_offset * 16, reg_names[info->frame_reg] );
442 break;
443 case UWOP_SAVE_NONVOL:
444 count = *(USHORT *)&info->opcodes[i+1] * 8;
445 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
446 i++;
447 break;
448 case UWOP_SAVE_NONVOL_FAR:
449 count = *(DWORD *)&info->opcodes[i+1];
450 TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
451 i += 2;
452 break;
453 case UWOP_SAVE_XMM128:
454 count = *(USHORT *)&info->opcodes[i+1] * 16;
455 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
456 i++;
457 break;
458 case UWOP_SAVE_XMM128_FAR:
459 count = *(DWORD *)&info->opcodes[i+1];
460 TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
461 i += 2;
462 break;
463 case UWOP_PUSH_MACHFRAME:
464 TRACE( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
465 break;
466 default:
467 FIXME( "unknown code %u\n", info->opcodes[i].code );
468 break;
469 }
470 }
471
472 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
473 if (info->flags & UNW_FLAG_CHAININFO)
474 {
475 TRACE( " chained to function %p-%p\n",
476 (char *)base + handler_data->chain.BeginAddress,
477 (char *)base + handler_data->chain.EndAddress );
478 function = &handler_data->chain;
479 continue;
480 }
481 if (info->flags & (UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER))
482 TRACE( " handler %p data at %p\n",
483 (char *)base + handler_data->handler, &handler_data->handler + 1 );
484 break;
485 }
486 }
487
488 static void dump_scope_table( ULONG64 base, const SCOPE_TABLE *table )
489 {
490 unsigned int i;
491
492 TRACE( "scope table at %p\n", table );
493 for (i = 0; i < table->Count; i++)
494 TRACE( " %u: %lx-%lx handler %lx target %lx\n", i,
495 base + table->ScopeRecord[i].BeginAddress,
496 base + table->ScopeRecord[i].EndAddress,
497 base + table->ScopeRecord[i].HandlerAddress,
498 base + table->ScopeRecord[i].JumpTarget );
499 }
500
501
502 /***********************************************************************
503 * Definitions for Dwarf unwind tables
504 */
505
506 enum dwarf_call_frame_info
507 {
508 DW_CFA_advance_loc = 0x40,
509 DW_CFA_offset = 0x80,
510 DW_CFA_restore = 0xc0,
511 DW_CFA_nop = 0x00,
512 DW_CFA_set_loc = 0x01,
513 DW_CFA_advance_loc1 = 0x02,
514 DW_CFA_advance_loc2 = 0x03,
515 DW_CFA_advance_loc4 = 0x04,
516 DW_CFA_offset_extended = 0x05,
517 DW_CFA_restore_extended = 0x06,
518 DW_CFA_undefined = 0x07,
519 DW_CFA_same_value = 0x08,
520 DW_CFA_register = 0x09,
521 DW_CFA_remember_state = 0x0a,
522 DW_CFA_restore_state = 0x0b,
523 DW_CFA_def_cfa = 0x0c,
524 DW_CFA_def_cfa_register = 0x0d,
525 DW_CFA_def_cfa_offset = 0x0e,
526 DW_CFA_def_cfa_expression = 0x0f,
527 DW_CFA_expression = 0x10,
528 DW_CFA_offset_extended_sf = 0x11,
529 DW_CFA_def_cfa_sf = 0x12,
530 DW_CFA_def_cfa_offset_sf = 0x13,
531 DW_CFA_val_offset = 0x14,
532 DW_CFA_val_offset_sf = 0x15,
533 DW_CFA_val_expression = 0x16,
534 };
535
536 enum dwarf_operation
537 {
538 DW_OP_addr = 0x03,
539 DW_OP_deref = 0x06,
540 DW_OP_const1u = 0x08,
541 DW_OP_const1s = 0x09,
542 DW_OP_const2u = 0x0a,
543 DW_OP_const2s = 0x0b,
544 DW_OP_const4u = 0x0c,
545 DW_OP_const4s = 0x0d,
546 DW_OP_const8u = 0x0e,
547 DW_OP_const8s = 0x0f,
548 DW_OP_constu = 0x10,
549 DW_OP_consts = 0x11,
550 DW_OP_dup = 0x12,
551 DW_OP_drop = 0x13,
552 DW_OP_over = 0x14,
553 DW_OP_pick = 0x15,
554 DW_OP_swap = 0x16,
555 DW_OP_rot = 0x17,
556 DW_OP_xderef = 0x18,
557 DW_OP_abs = 0x19,
558 DW_OP_and = 0x1a,
559 DW_OP_div = 0x1b,
560 DW_OP_minus = 0x1c,
561 DW_OP_mod = 0x1d,
562 DW_OP_mul = 0x1e,
563 DW_OP_neg = 0x1f,
564 DW_OP_not = 0x20,
565 DW_OP_or = 0x21,
566 DW_OP_plus = 0x22,
567 DW_OP_plus_uconst = 0x23,
568 DW_OP_shl = 0x24,
569 DW_OP_shr = 0x25,
570 DW_OP_shra = 0x26,
571 DW_OP_xor = 0x27,
572 DW_OP_bra = 0x28,
573 DW_OP_eq = 0x29,
574 DW_OP_ge = 0x2a,
575 DW_OP_gt = 0x2b,
576 DW_OP_le = 0x2c,
577 DW_OP_lt = 0x2d,
578 DW_OP_ne = 0x2e,
579 DW_OP_skip = 0x2f,
580 DW_OP_lit0 = 0x30,
581 DW_OP_lit1 = 0x31,
582 DW_OP_lit2 = 0x32,
583 DW_OP_lit3 = 0x33,
584 DW_OP_lit4 = 0x34,
585 DW_OP_lit5 = 0x35,
586 DW_OP_lit6 = 0x36,
587 DW_OP_lit7 = 0x37,
588 DW_OP_lit8 = 0x38,
589 DW_OP_lit9 = 0x39,
590 DW_OP_lit10 = 0x3a,
591 DW_OP_lit11 = 0x3b,
592 DW_OP_lit12 = 0x3c,
593 DW_OP_lit13 = 0x3d,
594 DW_OP_lit14 = 0x3e,
595 DW_OP_lit15 = 0x3f,
596 DW_OP_lit16 = 0x40,
597 DW_OP_lit17 = 0x41,
598 DW_OP_lit18 = 0x42,
599 DW_OP_lit19 = 0x43,
600 DW_OP_lit20 = 0x44,
601 DW_OP_lit21 = 0x45,
602 DW_OP_lit22 = 0x46,
603 DW_OP_lit23 = 0x47,
604 DW_OP_lit24 = 0x48,
605 DW_OP_lit25 = 0x49,
606 DW_OP_lit26 = 0x4a,
607 DW_OP_lit27 = 0x4b,
608 DW_OP_lit28 = 0x4c,
609 DW_OP_lit29 = 0x4d,
610 DW_OP_lit30 = 0x4e,
611 DW_OP_lit31 = 0x4f,
612 DW_OP_reg0 = 0x50,
613 DW_OP_reg1 = 0x51,
614 DW_OP_reg2 = 0x52,
615 DW_OP_reg3 = 0x53,
616 DW_OP_reg4 = 0x54,
617 DW_OP_reg5 = 0x55,
618 DW_OP_reg6 = 0x56,
619 DW_OP_reg7 = 0x57,
620 DW_OP_reg8 = 0x58,
621 DW_OP_reg9 = 0x59,
622 DW_OP_reg10 = 0x5a,
623 DW_OP_reg11 = 0x5b,
624 DW_OP_reg12 = 0x5c,
625 DW_OP_reg13 = 0x5d,
626 DW_OP_reg14 = 0x5e,
627 DW_OP_reg15 = 0x5f,
628 DW_OP_reg16 = 0x60,
629 DW_OP_reg17 = 0x61,
630 DW_OP_reg18 = 0x62,
631 DW_OP_reg19 = 0x63,
632 DW_OP_reg20 = 0x64,
633 DW_OP_reg21 = 0x65,
634 DW_OP_reg22 = 0x66,
635 DW_OP_reg23 = 0x67,
636 DW_OP_reg24 = 0x68,
637 DW_OP_reg25 = 0x69,
638 DW_OP_reg26 = 0x6a,
639 DW_OP_reg27 = 0x6b,
640 DW_OP_reg28 = 0x6c,
641 DW_OP_reg29 = 0x6d,
642 DW_OP_reg30 = 0x6e,
643 DW_OP_reg31 = 0x6f,
644 DW_OP_breg0 = 0x70,
645 DW_OP_breg1 = 0x71,
646 DW_OP_breg2 = 0x72,
647 DW_OP_breg3 = 0x73,
648 DW_OP_breg4 = 0x74,
649 DW_OP_breg5 = 0x75,
650 DW_OP_breg6 = 0x76,
651 DW_OP_breg7 = 0x77,
652 DW_OP_breg8 = 0x78,
653 DW_OP_breg9 = 0x79,
654 DW_OP_breg10 = 0x7a,
655 DW_OP_breg11 = 0x7b,
656 DW_OP_breg12 = 0x7c,
657 DW_OP_breg13 = 0x7d,
658 DW_OP_breg14 = 0x7e,
659 DW_OP_breg15 = 0x7f,
660 DW_OP_breg16 = 0x80,
661 DW_OP_breg17 = 0x81,
662 DW_OP_breg18 = 0x82,
663 DW_OP_breg19 = 0x83,
664 DW_OP_breg20 = 0x84,
665 DW_OP_breg21 = 0x85,
666 DW_OP_breg22 = 0x86,
667 DW_OP_breg23 = 0x87,
668 DW_OP_breg24 = 0x88,
669 DW_OP_breg25 = 0x89,
670 DW_OP_breg26 = 0x8a,
671 DW_OP_breg27 = 0x8b,
672 DW_OP_breg28 = 0x8c,
673 DW_OP_breg29 = 0x8d,
674 DW_OP_breg30 = 0x8e,
675 DW_OP_breg31 = 0x8f,
676 DW_OP_regx = 0x90,
677 DW_OP_fbreg = 0x91,
678 DW_OP_bregx = 0x92,
679 DW_OP_piece = 0x93,
680 DW_OP_deref_size = 0x94,
681 DW_OP_xderef_size = 0x95,
682 DW_OP_nop = 0x96,
683 DW_OP_push_object_address = 0x97,
684 DW_OP_call2 = 0x98,
685 DW_OP_call4 = 0x99,
686 DW_OP_call_ref = 0x9a,
687 DW_OP_form_tls_address = 0x9b,
688 DW_OP_call_frame_cfa = 0x9c,
689 DW_OP_bit_piece = 0x9d,
690 DW_OP_lo_user = 0xe0,
691 DW_OP_hi_user = 0xff,
692 DW_OP_GNU_push_tls_address = 0xe0,
693 DW_OP_GNU_uninit = 0xf0,
694 DW_OP_GNU_encoded_addr = 0xf1,
695 };
696
697 #define DW_EH_PE_native 0x00
698 #define DW_EH_PE_leb128 0x01
699 #define DW_EH_PE_data2 0x02
700 #define DW_EH_PE_data4 0x03
701 #define DW_EH_PE_data8 0x04
702 #define DW_EH_PE_signed 0x08
703 #define DW_EH_PE_abs 0x00
704 #define DW_EH_PE_pcrel 0x10
705 #define DW_EH_PE_textrel 0x20
706 #define DW_EH_PE_datarel 0x30
707 #define DW_EH_PE_funcrel 0x40
708 #define DW_EH_PE_aligned 0x50
709 #define DW_EH_PE_indirect 0x80
710 #define DW_EH_PE_omit 0xff
711
712 struct dwarf_eh_bases
713 {
714 void *tbase;
715 void *dbase;
716 void *func;
717 };
718
719 struct dwarf_cie
720 {
721 unsigned int length;
722 int id;
723 unsigned char version;
724 unsigned char augmentation[1];
725 };
726
727 struct dwarf_fde
728 {
729 unsigned int length;
730 unsigned int cie_offset;
731 };
732
733 extern const struct dwarf_fde *_Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
734
735 static unsigned char dwarf_get_u1( const unsigned char **p )
736 {
737 return *(*p)++;
738 }
739
740 static unsigned short dwarf_get_u2( const unsigned char **p )
741 {
742 unsigned int ret = (*p)[0] | ((*p)[1] << 8);
743 (*p) += 2;
744 return ret;
745 }
746
747 static unsigned int dwarf_get_u4( const unsigned char **p )
748 {
749 unsigned int ret = (*p)[0] | ((*p)[1] << 8) | ((*p)[2] << 16) | ((*p)[3] << 24);
750 (*p) += 4;
751 return ret;
752 }
753
754 static ULONG64 dwarf_get_u8( const unsigned char **p )
755 {
756 ULONG64 low = dwarf_get_u4( p );
757 ULONG64 high = dwarf_get_u4( p );
758 return low | (high << 32);
759 }
760
761 static ULONG_PTR dwarf_get_uleb128( const unsigned char **p )
762 {
763 ULONG_PTR ret = 0;
764 unsigned int shift = 0;
765 unsigned char byte;
766
767 do
768 {
769 byte = **p;
770 ret |= (ULONG_PTR)(byte & 0x7f) << shift;
771 shift += 7;
772 (*p)++;
773 } while (byte & 0x80);
774 return ret;
775 }
776
777 static LONG_PTR dwarf_get_sleb128( const unsigned char **p )
778 {
779 ULONG_PTR ret = 0;
780 unsigned int shift = 0;
781 unsigned char byte;
782
783 do
784 {
785 byte = **p;
786 ret |= (ULONG_PTR)(byte & 0x7f) << shift;
787 shift += 7;
788 (*p)++;
789 } while (byte & 0x80);
790
791 if ((shift < 8 * sizeof(ret)) && (byte & 0x40)) ret |= -((ULONG_PTR)1 << shift);
792 return ret;
793 }
794
795 static ULONG_PTR dwarf_get_ptr( const unsigned char **p, unsigned char encoding )
796 {
797 ULONG_PTR base;
798
799 if (encoding == DW_EH_PE_omit) return 0;
800
801 switch (encoding & 0xf0)
802 {
803 case DW_EH_PE_abs:
804 base = 0;
805 break;
806 case DW_EH_PE_pcrel:
807 base = (ULONG_PTR)*p;
808 break;
809 default:
810 FIXME( "unsupported encoding %02x\n", encoding );
811 return 0;
812 }
813
814 switch (encoding & 0x0f)
815 {
816 case DW_EH_PE_native:
817 return base + dwarf_get_u8( p );
818 case DW_EH_PE_leb128:
819 return base + dwarf_get_uleb128( p );
820 case DW_EH_PE_data2:
821 return base + dwarf_get_u2( p );
822 case DW_EH_PE_data4:
823 return base + dwarf_get_u4( p );
824 case DW_EH_PE_data8:
825 return base + dwarf_get_u8( p );
826 case DW_EH_PE_signed|DW_EH_PE_leb128:
827 return base + dwarf_get_sleb128( p );
828 case DW_EH_PE_signed|DW_EH_PE_data2:
829 return base + (signed short)dwarf_get_u2( p );
830 case DW_EH_PE_signed|DW_EH_PE_data4:
831 return base + (signed int)dwarf_get_u4( p );
832 case DW_EH_PE_signed|DW_EH_PE_data8:
833 return base + (LONG64)dwarf_get_u8( p );
834 default:
835 FIXME( "unsupported encoding %02x\n", encoding );
836 return 0;
837 }
838 }
839
840 enum reg_rule
841 {
842 RULE_UNSET, /* not set at all */
843 RULE_UNDEFINED, /* undefined value */
844 RULE_SAME, /* same value as previous frame */
845 RULE_CFA_OFFSET, /* stored at cfa offset */
846 RULE_OTHER_REG, /* stored in other register */
847 RULE_EXPRESSION, /* address specified by expression */
848 RULE_VAL_EXPRESSION /* value specified by expression */
849 };
850
851 #define NB_FRAME_REGS 41
852 #define MAX_SAVED_STATES 16
853
854 struct frame_state
855 {
856 ULONG_PTR cfa_offset;
857 unsigned char cfa_reg;
858 enum reg_rule cfa_rule;
859 enum reg_rule rules[NB_FRAME_REGS];
860 ULONG64 regs[NB_FRAME_REGS];
861 };
862
863 struct frame_info
864 {
865 ULONG_PTR ip;
866 ULONG_PTR code_align;
867 LONG_PTR data_align;
868 unsigned char retaddr_reg;
869 unsigned char fde_encoding;
870 unsigned char signal_frame;
871 unsigned char state_sp;
872 struct frame_state state;
873 struct frame_state *state_stack;
874 };
875
876 static const char *dwarf_reg_names[NB_FRAME_REGS] =
877 {
878 /* 0-7 */ "%rax", "%rdx", "%rcx", "%rbx", "%rsi", "%rdi", "%rbp", "%rsp",
879 /* 8-16 */ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%rip",
880 /* 17-24 */ "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7",
881 /* 25-32 */ "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15",
882 /* 33-40 */ "%st0", "%st1", "%st2", "%st3", "%st4", "%st5", "%st6", "%st7"
883 };
884
885 static BOOL valid_reg( ULONG_PTR reg )
886 {
887 if (reg >= NB_FRAME_REGS) FIXME( "unsupported reg %lx\n", reg );
888 return (reg < NB_FRAME_REGS);
889 }
890
891 static void execute_cfa_instructions( const unsigned char *ptr, const unsigned char *end,
892 ULONG_PTR last_ip, struct frame_info *info )
893 {
894 while (ptr < end && info->ip < last_ip + info->signal_frame)
895 {
896 enum dwarf_call_frame_info op = *ptr++;
897
898 if (op & 0xc0)
899 {
900 switch (op & 0xc0)
901 {
902 case DW_CFA_advance_loc:
903 {
904 ULONG_PTR offset = (op & 0x3f) * info->code_align;
905 TRACE( "%lx: DW_CFA_advance_loc %lu\n", info->ip, offset );
906 info->ip += offset;
907 break;
908 }
909 case DW_CFA_offset:
910 {
911 ULONG_PTR reg = op & 0x3f;
912 LONG_PTR offset = dwarf_get_uleb128( &ptr ) * info->data_align;
913 if (!valid_reg( reg )) break;
914 TRACE( "%lx: DW_CFA_offset %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
915 info->state.regs[reg] = offset;
916 info->state.rules[reg] = RULE_CFA_OFFSET;
917 break;
918 }
919 case DW_CFA_restore:
920 {
921 ULONG_PTR reg = op & 0x3f;
922 if (!valid_reg( reg )) break;
923 TRACE( "%lx: DW_CFA_restore %s\n", info->ip, dwarf_reg_names[reg] );
924 info->state.rules[reg] = RULE_UNSET;
925 break;
926 }
927 }
928 }
929 else switch (op)
930 {
931 case DW_CFA_nop:
932 break;
933 case DW_CFA_set_loc:
934 {
935 ULONG_PTR loc = dwarf_get_ptr( &ptr, info->fde_encoding );
936 TRACE( "%lx: DW_CFA_set_loc %lx\n", info->ip, loc );
937 info->ip = loc;
938 break;
939 }
940 case DW_CFA_advance_loc1:
941 {
942 ULONG_PTR offset = *ptr++ * info->code_align;
943 TRACE( "%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset );
944 info->ip += offset;
945 break;
946 }
947 case DW_CFA_advance_loc2:
948 {
949 ULONG_PTR offset = dwarf_get_u2( &ptr ) * info->code_align;
950 TRACE( "%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset );
951 info->ip += offset;
952 break;
953 }
954 case DW_CFA_advance_loc4:
955 {
956 ULONG_PTR offset = dwarf_get_u4( &ptr ) * info->code_align;
957 TRACE( "%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset );
958 info->ip += offset;
959 break;
960 }
961 case DW_CFA_offset_extended:
962 case DW_CFA_offset_extended_sf:
963 {
964 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
965 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf_get_uleb128( &ptr ) * info->data_align
966 : dwarf_get_sleb128( &ptr ) * info->data_align;
967 if (!valid_reg( reg )) break;
968 TRACE( "%lx: DW_CFA_offset_extended %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
969 info->state.regs[reg] = offset;
970 info->state.rules[reg] = RULE_CFA_OFFSET;
971 break;
972 }
973 case DW_CFA_restore_extended:
974 {
975 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
976 if (!valid_reg( reg )) break;
977 TRACE( "%lx: DW_CFA_restore_extended %s\n", info->ip, dwarf_reg_names[reg] );
978 info->state.rules[reg] = RULE_UNSET;
979 break;
980 }
981 case DW_CFA_undefined:
982 {
983 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
984 if (!valid_reg( reg )) break;
985 TRACE( "%lx: DW_CFA_undefined %s\n", info->ip, dwarf_reg_names[reg] );
986 info->state.rules[reg] = RULE_UNDEFINED;
987 break;
988 }
989 case DW_CFA_same_value:
990 {
991 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
992 if (!valid_reg( reg )) break;
993 TRACE( "%lx: DW_CFA_same_value %s\n", info->ip, dwarf_reg_names[reg] );
994 info->state.regs[reg] = reg;
995 info->state.rules[reg] = RULE_SAME;
996 break;
997 }
998 case DW_CFA_register:
999 {
1000 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1001 ULONG_PTR reg2 = dwarf_get_uleb128( &ptr );
1002 if (!valid_reg( reg ) || !valid_reg( reg2 )) break;
1003 TRACE( "%lx: DW_CFA_register %s == %s\n", info->ip, dwarf_reg_names[reg], dwarf_reg_names[reg2] );
1004 info->state.regs[reg] = reg2;
1005 info->state.rules[reg] = RULE_OTHER_REG;
1006 break;
1007 }
1008 case DW_CFA_remember_state:
1009 TRACE( "%lx: DW_CFA_remember_state\n", info->ip );
1010 if (info->state_sp >= MAX_SAVED_STATES)
1011 FIXME( "%lx: DW_CFA_remember_state too many nested saves\n", info->ip );
1012 else
1013 info->state_stack[info->state_sp++] = info->state;
1014 break;
1015 case DW_CFA_restore_state:
1016 TRACE( "%lx: DW_CFA_restore_state\n", info->ip );
1017 if (!info->state_sp)
1018 FIXME( "%lx: DW_CFA_restore_state without corresponding save\n", info->ip );
1019 else
1020 info->state = info->state_stack[--info->state_sp];
1021 break;
1022 case DW_CFA_def_cfa:
1023 case DW_CFA_def_cfa_sf:
1024 {
1025 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1026 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf_get_uleb128( &ptr )
1027 : dwarf_get_sleb128( &ptr ) * info->data_align;
1028 if (!valid_reg( reg )) break;
1029 TRACE( "%lx: DW_CFA_def_cfa %s, %lu\n", info->ip, dwarf_reg_names[reg], offset );
1030 info->state.cfa_reg = reg;
1031 info->state.cfa_offset = offset;
1032 info->state.cfa_rule = RULE_CFA_OFFSET;
1033 break;
1034 }
1035 case DW_CFA_def_cfa_register:
1036 {
1037 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1038 if (!valid_reg( reg )) break;
1039 TRACE( "%lx: DW_CFA_def_cfa_register %s\n", info->ip, dwarf_reg_names[reg] );
1040 info->state.cfa_reg = reg;
1041 info->state.cfa_rule = RULE_CFA_OFFSET;
1042 break;
1043 }
1044 case DW_CFA_def_cfa_offset:
1045 case DW_CFA_def_cfa_offset_sf:
1046 {
1047 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf_get_uleb128( &ptr )
1048 : dwarf_get_sleb128( &ptr ) * info->data_align;
1049 TRACE( "%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset );
1050 info->state.cfa_offset = offset;
1051 info->state.cfa_rule = RULE_CFA_OFFSET;
1052 break;
1053 }
1054 case DW_CFA_def_cfa_expression:
1055 {
1056 ULONG_PTR expr = (ULONG_PTR)ptr;
1057 ULONG_PTR len = dwarf_get_uleb128( &ptr );
1058 TRACE( "%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len );
1059 info->state.cfa_offset = expr;
1060 info->state.cfa_rule = RULE_VAL_EXPRESSION;
1061 ptr += len;
1062 break;
1063 }
1064 case DW_CFA_expression:
1065 case DW_CFA_val_expression:
1066 {
1067 ULONG_PTR reg = dwarf_get_uleb128( &ptr );
1068 ULONG_PTR expr = (ULONG_PTR)ptr;
1069 ULONG_PTR len = dwarf_get_uleb128( &ptr );
1070 if (!valid_reg( reg )) break;
1071 TRACE( "%lx: DW_CFA_%sexpression %s %lx-%lx\n",
1072 info->ip, (op == DW_CFA_expression) ? "" : "val_", dwarf_reg_names[reg], expr, expr+len );
1073 info->state.regs[reg] = expr;
1074 info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
1075 ptr += len;
1076 break;
1077 }
1078 default:
1079 FIXME( "%lx: unknown CFA opcode %02x\n", info->ip, op );
1080 break;
1081 }
1082 }
1083 }
1084
1085 /* retrieve a context register from its dwarf number */
1086 static void *get_context_reg( CONTEXT *context, ULONG_PTR dw_reg )
1087 {
1088 switch (dw_reg)
1089 {
1090 case 0: return &context->Rax;
1091 case 1: return &context->Rdx;
1092 case 2: return &context->Rcx;
1093 case 3: return &context->Rbx;
1094 case 4: return &context->Rsi;
1095 case 5: return &context->Rdi;
1096 case 6: return &context->Rbp;
1097 case 7: return &context->Rsp;
1098 case 8: return &context->R8;
1099 case 9: return &context->R9;
1100 case 10: return &context->R10;
1101 case 11: return &context->R11;
1102 case 12: return &context->R12;
1103 case 13: return &context->R13;
1104 case 14: return &context->R14;
1105 case 15: return &context->R15;
1106 case 16: return &context->Rip;
1107 case 17: return &context->u.s.Xmm0;
1108 case 18: return &context->u.s.Xmm1;
1109 case 19: return &context->u.s.Xmm2;
1110 case 20: return &context->u.s.Xmm3;
1111 case 21: return &context->u.s.Xmm4;
1112 case 22: return &context->u.s.Xmm5;
1113 case 23: return &context->u.s.Xmm6;
1114 case 24: return &context->u.s.Xmm7;
1115 case 25: return &context->u.s.Xmm8;
1116 case 26: return &context->u.s.Xmm9;
1117 case 27: return &context->u.s.Xmm10;
1118 case 28: return &context->u.s.Xmm11;
1119 case 29: return &context->u.s.Xmm12;
1120 case 30: return &context->u.s.Xmm13;
1121 case 31: return &context->u.s.Xmm14;
1122 case 32: return &context->u.s.Xmm15;
1123 case 33: return &context->u.s.Legacy[0];
1124 case 34: return &context->u.s.Legacy[1];
1125 case 35: return &context->u.s.Legacy[2];
1126 case 36: return &context->u.s.Legacy[3];
1127 case 37: return &context->u.s.Legacy[4];
1128 case 38: return &context->u.s.Legacy[5];
1129 case 39: return &context->u.s.Legacy[6];
1130 case 40: return &context->u.s.Legacy[7];
1131 default: return NULL;
1132 }
1133 }
1134
1135 /* set a context register from its dwarf number */
1136 static void set_context_reg( CONTEXT *context, ULONG_PTR dw_reg, void *val )
1137 {
1138 switch (dw_reg)
1139 {
1140 case 0: context->Rax = *(ULONG64 *)val; break;
1141 case 1: context->Rdx = *(ULONG64 *)val; break;
1142 case 2: context->Rcx = *(ULONG64 *)val; break;
1143 case 3: context->Rbx = *(ULONG64 *)val; break;
1144 case 4: context->Rsi = *(ULONG64 *)val; break;
1145 case 5: context->Rdi = *(ULONG64 *)val; break;
1146 case 6: context->Rbp = *(ULONG64 *)val; break;
1147 case 7: context->Rsp = *(ULONG64 *)val; break;
1148 case 8: context->R8 = *(ULONG64 *)val; break;
1149 case 9: context->R9 = *(ULONG64 *)val; break;
1150 case 10: context->R10 = *(ULONG64 *)val; break;
1151 case 11: context->R11 = *(ULONG64 *)val; break;
1152 case 12: context->R12 = *(ULONG64 *)val; break;
1153 case 13: context->R13 = *(ULONG64 *)val; break;
1154 case 14: context->R14 = *(ULONG64 *)val; break;
1155 case 15: context->R15 = *(ULONG64 *)val; break;
1156 case 16: context->Rip = *(ULONG64 *)val; break;
1157 case 17: context->u.s.Xmm0 = *(M128A *)val; break;
1158 case 18: context->u.s.Xmm1 = *(M128A *)val; break;
1159 case 19: context->u.s.Xmm2 = *(M128A *)val; break;
1160 case 20: context->u.s.Xmm3 = *(M128A *)val; break;
1161 case 21: context->u.s.Xmm4 = *(M128A *)val; break;
1162 case 22: context->u.s.Xmm5 = *(M128A *)val; break;
1163 case 23: context->u.s.Xmm6 = *(M128A *)val; break;
1164 case 24: context->u.s.Xmm7 = *(M128A *)val; break;
1165 case 25: context->u.s.Xmm8 = *(M128A *)val; break;
1166 case 26: context->u.s.Xmm9 = *(M128A *)val; break;
1167 case 27: context->u.s.Xmm10 = *(M128A *)val; break;
1168 case 28: context->u.s.Xmm11 = *(M128A *)val; break;
1169 case 29: context->u.s.Xmm12 = *(M128A *)val; break;
1170 case 30: context->u.s.Xmm13 = *(M128A *)val; break;
1171 case 31: context->u.s.Xmm14 = *(M128A *)val; break;
1172 case 32: context->u.s.Xmm15 = *(M128A *)val; break;
1173 case 33: context->u.s.Legacy[0] = *(M128A *)val; break;
1174 case 34: context->u.s.Legacy[1] = *(M128A *)val; break;
1175 case 35: context->u.s.Legacy[2] = *(M128A *)val; break;
1176 case 36: context->u.s.Legacy[3] = *(M128A *)val; break;
1177 case 37: context->u.s.Legacy[4] = *(M128A *)val; break;
1178 case 38: context->u.s.Legacy[5] = *(M128A *)val; break;
1179 case 39: context->u.s.Legacy[6] = *(M128A *)val; break;
1180 case 40: context->u.s.Legacy[7] = *(M128A *)val; break;
1181 }
1182 }
1183
1184 static ULONG_PTR eval_expression( const unsigned char *p, CONTEXT *context )
1185 {
1186 ULONG_PTR reg, tmp, stack[64];
1187 int sp = -1;
1188 ULONG_PTR len = dwarf_get_uleb128(&p);
1189 const unsigned char *end = p + len;
1190
1191 while (p < end)
1192 {
1193 unsigned char opcode = dwarf_get_u1(&p);
1194
1195 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
1196 stack[++sp] = opcode - DW_OP_lit0;
1197 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
1198 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_reg0 );
1199 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
1200 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_breg0 ) + dwarf_get_sleb128(&p);
1201 else switch (opcode)
1202 {
1203 case DW_OP_nop: break;
1204 case DW_OP_addr: stack[++sp] = dwarf_get_u8(&p); break;
1205 case DW_OP_const1u: stack[++sp] = dwarf_get_u1(&p); break;
1206 case DW_OP_const1s: stack[++sp] = (signed char)dwarf_get_u1(&p); break;
1207 case DW_OP_const2u: stack[++sp] = dwarf_get_u2(&p); break;
1208 case DW_OP_const2s: stack[++sp] = (short)dwarf_get_u2(&p); break;
1209 case DW_OP_const4u: stack[++sp] = dwarf_get_u4(&p); break;
1210 case DW_OP_const4s: stack[++sp] = (signed int)dwarf_get_u4(&p); break;
1211 case DW_OP_const8u: stack[++sp] = dwarf_get_u8(&p); break;
1212 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf_get_u8(&p); break;
1213 case DW_OP_constu: stack[++sp] = dwarf_get_uleb128(&p); break;
1214 case DW_OP_consts: stack[++sp] = dwarf_get_sleb128(&p); break;
1215 case DW_OP_deref: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
1216 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
1217 case DW_OP_drop: sp--; break;
1218 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
1219 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf_get_u1(&p)]; sp++; break;
1220 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
1221 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
1222 case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
1223 case DW_OP_neg: stack[sp] = -stack[sp]; break;
1224 case DW_OP_not: stack[sp] = ~stack[sp]; break;
1225 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
1226 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
1227 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
1228 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
1229 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
1230 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
1231 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
1232 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
1233 case DW_OP_plus_uconst: stack[sp] += dwarf_get_uleb128(&p); break;
1234 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
1235 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
1236 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
1237 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
1238 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
1239 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
1240 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
1241 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
1242 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
1243 case DW_OP_skip: tmp = (short)dwarf_get_u2(&p); p += tmp; break;
1244 case DW_OP_bra: tmp = (short)dwarf_get_u2(&p); if (!stack[sp--]) p += tmp; break;
1245 case DW_OP_GNU_encoded_addr: tmp = *p++; stack[++sp] = dwarf_get_ptr( &p, tmp ); break;
1246 case DW_OP_regx: stack[++sp] = *(ULONG_PTR *)get_context_reg( context, dwarf_get_uleb128(&p) ); break;
1247 case DW_OP_bregx:
1248 reg = dwarf_get_uleb128(&p);
1249 tmp = dwarf_get_sleb128(&p);
1250 stack[++sp] = *(ULONG_PTR *)get_context_reg( context, reg ) + tmp;
1251 break;
1252 case DW_OP_deref_size:
1253 switch (*p++)
1254 {
1255 case 1: stack[sp] = *(unsigned char *)stack[sp]; break;
1256 case 2: stack[sp] = *(unsigned short *)stack[sp]; break;
1257 case 4: stack[sp] = *(unsigned int *)stack[sp]; break;
1258 case 8: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
1259 }
1260 break;
1261 default:
1262 FIXME( "unhandled opcode %02x\n", opcode );
1263 }
1264 }
1265 return stack[sp];
1266 }
1267
1268 /* apply the computed frame info to the actual context */
1269 static void apply_frame_state( CONTEXT *context, struct frame_state *state )
1270 {
1271 unsigned int i;
1272 ULONG_PTR cfa, value;
1273 CONTEXT new_context = *context;
1274
1275 switch (state->cfa_rule)
1276 {
1277 case RULE_EXPRESSION:
1278 cfa = *(ULONG_PTR *)eval_expression( (const unsigned char *)state->cfa_offset, context );
1279 break;
1280 case RULE_VAL_EXPRESSION:
1281 cfa = eval_expression( (const unsigned char *)state->cfa_offset, context );
1282 break;
1283 default:
1284 cfa = *(ULONG_PTR *)get_context_reg( context, state->cfa_reg ) + state->cfa_offset;
1285 break;
1286 }
1287 if (!cfa) return;
1288
1289 for (i = 0; i < NB_FRAME_REGS; i++)
1290 {
1291 switch (state->rules[i])
1292 {
1293 case RULE_UNSET:
1294 case RULE_UNDEFINED:
1295 case RULE_SAME:
1296 break;
1297 case RULE_CFA_OFFSET:
1298 set_context_reg( &new_context, i, (char *)cfa + state->regs[i] );
1299 break;
1300 case RULE_OTHER_REG:
1301 set_context_reg( &new_context, i, get_context_reg( context, state->regs[i] ));
1302 break;
1303 case RULE_EXPRESSION:
1304 value = eval_expression( (const unsigned char *)state->regs[i], context );
1305 set_context_reg( &new_context, i, (void *)value );
1306 break;
1307 case RULE_VAL_EXPRESSION:
1308 value = eval_expression( (const unsigned char *)state->regs[i], context );
1309 set_context_reg( &new_context, i, &value );
1310 break;
1311 }
1312 }
1313 new_context.Rsp = cfa;
1314 *context = new_context;
1315 }
1316
1317
1318 /***********************************************************************
1319 * dwarf_virtual_unwind
1320 *
1321 * Equivalent of RtlVirtualUnwind for builtin modules.
1322 */
1323 static NTSTATUS dwarf_virtual_unwind( ULONG64 ip, ULONG64 *frame,CONTEXT *context,
1324 const struct dwarf_fde *fde, const struct dwarf_eh_bases *bases,
1325 PEXCEPTION_ROUTINE *handler, void **handler_data )
1326 {
1327 const struct dwarf_cie *cie;
1328 const unsigned char *ptr, *augmentation, *end;
1329 ULONG_PTR len, code_end;
1330 struct frame_info info;
1331 struct frame_state state_stack[MAX_SAVED_STATES];
1332 int aug_z_format = 0;
1333 unsigned char lsda_encoding = DW_EH_PE_omit;
1334
1335 memset( &info, 0, sizeof(info) );
1336 info.state_stack = state_stack;
1337 info.ip = (ULONG_PTR)bases->func;
1338 *handler = NULL;
1339
1340 cie = (const struct dwarf_cie *)((const char *)&fde->cie_offset - fde->cie_offset);
1341
1342 /* parse the CIE first */
1343
1344 if (cie->version != 1 && cie->version != 3)
1345 {
1346 FIXME( "unknown CIE version %u at %p\n", cie->version, cie );
1347 return STATUS_INVALID_DISPOSITION;
1348 }
1349 ptr = cie->augmentation + strlen((const char *)cie->augmentation) + 1;
1350
1351 info.code_align = dwarf_get_uleb128( &ptr );
1352 info.data_align = dwarf_get_sleb128( &ptr );
1353 if (cie->version == 1)
1354 info.retaddr_reg = *ptr++;
1355 else
1356 info.retaddr_reg = dwarf_get_uleb128( &ptr );
1357 info.state.cfa_rule = RULE_CFA_OFFSET;
1358
1359 TRACE( "function %lx base %p cie %p len %x id %x version %x aug '%s' code_align %lu data_align %ld retaddr %s\n",
1360 ip, bases->func, cie, cie->length, cie->id, cie->version, cie->augmentation,
1361 info.code_align, info.data_align, dwarf_reg_names[info.retaddr_reg] );
1362
1363 end = NULL;
1364 for (augmentation = cie->augmentation; *augmentation; augmentation++)
1365 {
1366 switch (*augmentation)
1367 {
1368 case 'z':
1369 len = dwarf_get_uleb128( &ptr );
1370 end = ptr + len;
1371 aug_z_format = 1;
1372 continue;
1373 case 'L':
1374 lsda_encoding = *ptr++;
1375 continue;
1376 case 'P':
1377 {
1378 unsigned char encoding = *ptr++;
1379 *handler = (void *)dwarf_get_ptr( &ptr, encoding );
1380 continue;
1381 }
1382 case 'R':
1383 info.fde_encoding = *ptr++;
1384 continue;
1385 case 'S':
1386 info.signal_frame = 1;
1387 continue;
1388 }
1389 FIXME( "unknown augmentation '%c'\n", *augmentation );
1390 if (!end) return STATUS_INVALID_DISPOSITION; /* cannot continue */
1391 break;
1392 }
1393 if (end) ptr = end;
1394
1395 end = (const unsigned char *)(&cie->length + 1) + cie->length;
1396 execute_cfa_instructions( ptr, end, ip, &info );
1397
1398 ptr = (const unsigned char *)(fde + 1);
1399 info.ip = dwarf_get_ptr( &ptr, info.fde_encoding ); /* fde code start */
1400 code_end = info.ip + dwarf_get_ptr( &ptr, info.fde_encoding & 0x0f ); /* fde code length */
1401
1402 if (aug_z_format) /* get length of augmentation data */
1403 {
1404 len = dwarf_get_uleb128( &ptr );
1405 end = ptr + len;
1406 }
1407 else end = NULL;
1408
1409 *handler_data = (void *)dwarf_get_ptr( &ptr, lsda_encoding );
1410 if (end) ptr = end;
1411
1412 end = (const unsigned char *)(&fde->length + 1) + fde->length;
1413 TRACE( "fde %p len %x personality %p lsda %p code %lx-%lx\n",
1414 fde, fde->length, *handler, *handler_data, info.ip, code_end );
1415 execute_cfa_instructions( ptr, end, ip, &info );
1416 *frame = context->Rsp;
1417 apply_frame_state( context, &info.state );
1418
1419 TRACE( "next function rip=%016lx\n", context->Rip );
1420 TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
1421 context->Rax, context->Rbx, context->Rcx, context->Rdx );
1422 TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
1423 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
1424 TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
1425 context->R8, context->R9, context->R10, context->R11 );
1426 TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
1427 context->R12, context->R13, context->R14, context->R15 );
1428
1429 return STATUS_SUCCESS;
1430 }
1431
1432
1433 #ifdef HAVE_LIBUNWIND_H
1434 /***********************************************************************
1435 * libunwind_set_cursor_from_context
1436 */
1437 static int libunwind_set_cursor_from_context( unw_cursor_t *cursor, CONTEXT *context, ULONG64 ip )
1438 {
1439 int rc;
1440
1441 rc = unw_set_reg(cursor, UNW_REG_IP, ip);
1442 if (rc == UNW_ESUCCESS)
1443 rc = unw_set_reg(cursor, UNW_REG_SP, context->Rsp);
1444 if (rc == UNW_ESUCCESS)
1445 rc = unw_set_reg(cursor, UNW_X86_64_RAX, context->Rax);
1446 if (rc == UNW_ESUCCESS)
1447 rc = unw_set_reg(cursor, UNW_X86_64_RDX, context->Rdx);
1448 if (rc == UNW_ESUCCESS)
1449 rc = unw_set_reg(cursor, UNW_X86_64_RCX, context->Rcx);
1450 if (rc == UNW_ESUCCESS)
1451 rc = unw_set_reg(cursor, UNW_X86_64_RBX, context->Rbx);
1452 if (rc == UNW_ESUCCESS)
1453 rc = unw_set_reg(cursor, UNW_X86_64_RSI, context->Rsi);
1454 if (rc == UNW_ESUCCESS)
1455 rc = unw_set_reg(cursor, UNW_X86_64_RDI, context->Rdi);
1456 if (rc == UNW_ESUCCESS)
1457 rc = unw_set_reg(cursor, UNW_X86_64_RBP, context->Rbp);
1458 if (rc == UNW_ESUCCESS)
1459 rc = unw_set_reg(cursor, UNW_X86_64_R8, context->R8);
1460 if (rc == UNW_ESUCCESS)
1461 rc = unw_set_reg(cursor, UNW_X86_64_R9, context->R9);
1462 if (rc == UNW_ESUCCESS)
1463 rc = unw_set_reg(cursor, UNW_X86_64_R10, context->R10);
1464 if (rc == UNW_ESUCCESS)
1465 rc = unw_set_reg(cursor, UNW_X86_64_R11, context->R11);
1466 if (rc == UNW_ESUCCESS)
1467 rc = unw_set_reg(cursor, UNW_X86_64_R12, context->R12);
1468 if (rc == UNW_ESUCCESS)
1469 rc = unw_set_reg(cursor, UNW_X86_64_R13, context->R13);
1470 if (rc == UNW_ESUCCESS)
1471 rc = unw_set_reg(cursor, UNW_X86_64_R14, context->R14);
1472 if (rc == UNW_ESUCCESS)
1473 rc = unw_set_reg(cursor, UNW_X86_64_R15, context->R15);
1474
1475 return rc;
1476 }
1477
1478
1479 /***********************************************************************
1480 * libunwind_get_reg
1481 */
1482 static int libunwind_get_reg( unw_cursor_t *cursor, unw_regnum_t reg, ULONG64 *val )
1483 {
1484 int rc;
1485 unw_word_t word;
1486
1487 rc = unw_get_reg(cursor, reg, &word);
1488 if (rc == UNW_ESUCCESS)
1489 *val = word;
1490
1491 return rc;
1492 }
1493
1494
1495 /***********************************************************************
1496 * libunwind_set_context_from_cursor
1497 */
1498 static BOOL libunwind_set_context_from_cursor( CONTEXT *context, unw_cursor_t *cursor )
1499 {
1500 int rc;
1501
1502 rc = libunwind_get_reg(cursor, UNW_REG_IP, &context->Rip);
1503 if (rc == UNW_ESUCCESS)
1504 rc = libunwind_get_reg(cursor, UNW_REG_SP, &context->Rsp);
1505 if (rc == UNW_ESUCCESS)
1506 rc = libunwind_get_reg(cursor, UNW_X86_64_RAX, &context->Rax);
1507 if (rc == UNW_ESUCCESS)
1508 rc = libunwind_get_reg(cursor, UNW_X86_64_RDX, &context->Rdx);
1509 if (rc == UNW_ESUCCESS)
1510 rc = libunwind_get_reg(cursor, UNW_X86_64_RCX, &context->Rcx);
1511 if (rc == UNW_ESUCCESS)
1512 rc = libunwind_get_reg(cursor, UNW_X86_64_RBX, &context->Rbx);
1513 if (rc == UNW_ESUCCESS)
1514 rc = libunwind_get_reg(cursor, UNW_X86_64_RSI, &context->Rsi);
1515 if (rc == UNW_ESUCCESS)
1516 rc = libunwind_get_reg(cursor, UNW_X86_64_RDI, &context->Rdi);
1517 if (rc == UNW_ESUCCESS)
1518 rc = libunwind_get_reg(cursor, UNW_X86_64_RBP, &context->Rbp);
1519 if (rc == UNW_ESUCCESS)
1520 rc = libunwind_get_reg(cursor, UNW_X86_64_R8, &context->R8);
1521 if (rc == UNW_ESUCCESS)
1522 rc = libunwind_get_reg(cursor, UNW_X86_64_R9, &context->R9);
1523 if (rc == UNW_ESUCCESS)
1524 rc = libunwind_get_reg(cursor, UNW_X86_64_R10, &context->R10);
1525 if (rc == UNW_ESUCCESS)
1526 rc = libunwind_get_reg(cursor, UNW_X86_64_R11, &context->R11);
1527 if (rc == UNW_ESUCCESS)
1528 rc = libunwind_get_reg(cursor, UNW_X86_64_R12, &context->R12);
1529 if (rc == UNW_ESUCCESS)
1530 rc = libunwind_get_reg(cursor, UNW_X86_64_R13, &context->R13);
1531 if (rc == UNW_ESUCCESS)
1532 rc = libunwind_get_reg(cursor, UNW_X86_64_R14, &context->R14);
1533 if (rc == UNW_ESUCCESS)
1534 rc = libunwind_get_reg(cursor, UNW_X86_64_R15, &context->R15);
1535
1536 return rc;
1537 }
1538
1539
1540 /***********************************************************************
1541 * libunwind_virtual_unwind
1542 *
1543 * Equivalent of RtlVirtualUnwind for builtin modules.
1544 */
1545 static NTSTATUS libunwind_virtual_unwind( ULONG64 ip, BOOL* got_info, ULONG64 *frame, CONTEXT *context,
1546 PEXCEPTION_ROUTINE *handler, void **handler_data )
1547 {
1548 unw_context_t unw_context;
1549 unw_cursor_t cursor;
1550 unw_proc_info_t info;
1551 int rc;
1552
1553 rc = unw_getcontext( &unw_context );
1554 if (rc == UNW_ESUCCESS)
1555 rc = unw_init_local( &cursor, &unw_context );
1556 if (rc == UNW_ESUCCESS)
1557 rc = libunwind_set_cursor_from_context( &cursor, context, ip - 1 );
1558 if (rc != UNW_ESUCCESS)
1559 {
1560 WARN( "setup failed: %d\n", rc );
1561 return STATUS_INVALID_DISPOSITION;
1562 }
1563
1564 rc = unw_get_proc_info(&cursor, &info);
1565 if (rc != UNW_ESUCCESS && rc != UNW_ENOINFO)
1566 {
1567 WARN( "failed to get info: %d\n", rc );
1568 return STATUS_INVALID_DISPOSITION;
1569 }
1570 if (rc == UNW_ENOINFO || ip < info.start_ip || info.end_ip <= ip || !info.format)
1571 {
1572 *got_info = FALSE;
1573 return STATUS_SUCCESS;
1574 }
1575
1576 TRACE( "ip %#lx function %#lx-%#lx personality %#lx lsda %#lx fde %#lx\n",
1577 ip, (unsigned long)info.start_ip, (unsigned long)info.end_ip, (unsigned long)info.handler,
1578 (unsigned long)info.lsda, (unsigned long)info.unwind_info );
1579
1580 rc = unw_step(&cursor);
1581 if (rc < 0)
1582 {
1583 WARN( "failed to unwind: %d\n", rc );
1584 return STATUS_INVALID_DISPOSITION;
1585 }
1586
1587 *frame = context->Rsp;
1588
1589 rc = libunwind_set_context_from_cursor( context, &cursor );
1590 if (rc != UNW_ESUCCESS)
1591 {
1592 WARN( "failed to update context after unwind: %d\n", rc );
1593 return STATUS_INVALID_DISPOSITION;
1594 }
1595
1596 *handler = (void*)info.handler;
1597 *handler_data = (void*)info.lsda;
1598 *got_info = TRUE;
1599
1600 TRACE( "next function rip=%016lx\n", context->Rip );
1601 TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
1602 context->Rax, context->Rbx, context->Rcx, context->Rdx );
1603 TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
1604 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
1605 TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
1606 context->R8, context->R9, context->R10, context->R11 );
1607 TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
1608 context->R12, context->R13, context->R14, context->R15 );
1609
1610 return STATUS_SUCCESS;
1611 }
1612 #endif
1613
1614
1615 /***********************************************************************
1616 * dispatch_signal
1617 */
1618 static inline int dispatch_signal(unsigned int sig)
1619 {
1620 if (handlers[sig] == NULL) return 0;
1621 return handlers[sig](sig);
1622 }
1623
1624 /***********************************************************************
1625 * get_signal_stack
1626 *
1627 * Get the base of the signal stack for the current thread.
1628 */
1629 static inline void *get_signal_stack(void)
1630 {
1631 return (char *)NtCurrentTeb() + teb_size;
1632 }
1633
1634 /***********************************************************************
1635 * is_inside_signal_stack
1636 *
1637 * Check if pointer is inside the signal stack.
1638 */
1639 static inline BOOL is_inside_signal_stack( void *ptr )
1640 {
1641 return ((char *)ptr >= (char *)get_signal_stack() &&
1642 (char *)ptr < (char *)get_signal_stack() + signal_stack_size);
1643 }
1644
1645 /***********************************************************************
1646 * save_context
1647 *
1648 * Set the register values from a sigcontext.
1649 */
1650 static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
1651 {
1652 context->ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS;
1653 context->Rax = RAX_sig(sigcontext);
1654 context->Rcx = RCX_sig(sigcontext);
1655 context->Rdx = RDX_sig(sigcontext);
1656 context->Rbx = RBX_sig(sigcontext);
1657 context->Rsp = RSP_sig(sigcontext);
1658 context->Rbp = RBP_sig(sigcontext);
1659 context->Rsi = RSI_sig(sigcontext);
1660 context->Rdi = RDI_sig(sigcontext);
1661 context->R8 = R8_sig(sigcontext);
1662 context->R9 = R9_sig(sigcontext);
1663 context->R10 = R10_sig(sigcontext);
1664 context->R11 = R11_sig(sigcontext);
1665 context->R12 = R12_sig(sigcontext);
1666 context->R13 = R13_sig(sigcontext);
1667 context->R14 = R14_sig(sigcontext);
1668 context->R15 = R15_sig(sigcontext);
1669 context->Rip = RIP_sig(sigcontext);
1670 context->SegCs = CS_sig(sigcontext);
1671 context->SegFs = FS_sig(sigcontext);
1672 context->SegGs = GS_sig(sigcontext);
1673 context->EFlags = EFL_sig(sigcontext);
1674 #ifdef DS_sig
1675 context->SegDs = DS_sig(sigcontext);
1676 #else
1677 __asm__("movw %%ds,%0" : "=m" (context->SegDs));
1678 #endif
1679 #ifdef ES_sig
1680 context->SegEs = ES_sig(sigcontext);
1681 #else
1682 __asm__("movw %%es,%0" : "=m" (context->SegEs));
1683 #endif
1684 #ifdef SS_sig
1685 context->SegSs = SS_sig(sigcontext);
1686 #else
1687 __asm__("movw %%ss,%0" : "=m" (context->SegSs));
1688 #endif
1689 if (FPU_sig(sigcontext))
1690 {
1691 context->ContextFlags |= CONTEXT_FLOATING_POINT;
1692 context->u.FltSave = *FPU_sig(sigcontext);
1693 context->MxCsr = context->u.FltSave.MxCsr;
1694 }
1695 }
1696
1697
1698 /***********************************************************************
1699 * restore_context
1700 *
1701 * Build a sigcontext from the register values.
1702 */
1703 static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
1704 {
1705 RAX_sig(sigcontext) = context->Rax;
1706 RCX_sig(sigcontext) = context->Rcx;
1707 RDX_sig(sigcontext) = context->Rdx;
1708 RBX_sig(sigcontext) = context->Rbx;
1709 RSP_sig(sigcontext) = context->Rsp;
1710 RBP_sig(sigcontext) = context->Rbp;
1711 RSI_sig(sigcontext) = context->Rsi;
1712 RDI_sig(sigcontext) = context->Rdi;
1713 R8_sig(sigcontext) = context->R8;
1714 R9_sig(sigcontext) = context->R9;
1715 R10_sig(sigcontext) = context->R10;
1716 R11_sig(sigcontext) = context->R11;
1717 R12_sig(sigcontext) = context->R12;
1718 R13_sig(sigcontext) = context->R13;
1719 R14_sig(sigcontext) = context->R14;
1720 R15_sig(sigcontext) = context->R15;
1721 RIP_sig(sigcontext) = context->Rip;
1722 CS_sig(sigcontext) = context->SegCs;
1723 FS_sig(sigcontext) = context->SegFs;
1724 GS_sig(sigcontext) = context->SegGs;
1725 EFL_sig(sigcontext) = context->EFlags;
1726 #ifdef DS_sig
1727 DS_sig(sigcontext) = context->SegDs;
1728 #endif
1729 #ifdef ES_sig
1730 ES_sig(sigcontext) = context->SegEs;
1731 #endif
1732 #ifdef SS_sig
1733 SS_sig(sigcontext) = context->SegSs;
1734 #endif
1735 if (FPU_sig(sigcontext)) *FPU_sig(sigcontext) = context->u.FltSave;
1736 }
1737
1738
1739 /**************************************************************************
1740 * __chkstk (NTDLL.@)
1741 *
1742 * Supposed to touch all the stack pages, but we shouldn't need that.
1743 */
1744 __ASM_GLOBAL_FUNC( __chkstk, "ret" );
1745
1746
1747 /***********************************************************************
1748 * RtlCaptureContext (NTDLL.@)
1749 */
1750 __ASM_GLOBAL_FUNC( RtlCaptureContext,
1751 "pushfq\n\t"
1752 __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
1753 "movl $0x001000f,0x30(%rcx)\n\t" /* context->ContextFlags */
1754 "stmxcsr 0x34(%rcx)\n\t" /* context->MxCsr */
1755 "movw %cs,0x38(%rcx)\n\t" /* context->SegCs */
1756 "movw %ds,0x3a(%rcx)\n\t" /* context->SegDs */
1757 "movw %es,0x3c(%rcx)\n\t" /* context->SegEs */
1758 "movw %fs,0x3e(%rcx)\n\t" /* context->SegFs */
1759 "movw %gs,0x40(%rcx)\n\t" /* context->SegGs */
1760 "movw %ss,0x42(%rcx)\n\t" /* context->SegSs */
1761 "popq 0x44(%rcx)\n\t" /* context->Eflags */
1762 __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
1763 "movq %rax,0x78(%rcx)\n\t" /* context->Rax */
1764 "movq %rcx,0x80(%rcx)\n\t" /* context->Rcx */
1765 "movq %rdx,0x88(%rcx)\n\t" /* context->Rdx */
1766 "movq %rbx,0x90(%rcx)\n\t" /* context->Rbx */
1767 "leaq 8(%rsp),%rax\n\t"
1768 "movq %rax,0x98(%rcx)\n\t" /* context->Rsp */
1769 "movq %rbp,0xa0(%rcx)\n\t" /* context->Rbp */
1770 "movq %rsi,0xa8(%rcx)\n\t" /* context->Rsi */
1771 "movq %rdi,0xb0(%rcx)\n\t" /* context->Rdi */
1772 "movq %r8,0xb8(%rcx)\n\t" /* context->R8 */
1773 "movq %r9,0xc0(%rcx)\n\t" /* context->R9 */
1774 "movq %r10,0xc8(%rcx)\n\t" /* context->R10 */
1775 "movq %r11,0xd0(%rcx)\n\t" /* context->R11 */
1776 "movq %r12,0xd8(%rcx)\n\t" /* context->R12 */
1777 "movq %r13,0xe0(%rcx)\n\t" /* context->R13 */
1778 "movq %r14,0xe8(%rcx)\n\t" /* context->R14 */
1779 "movq %r15,0xf0(%rcx)\n\t" /* context->R15 */
1780 "movq (%rsp),%rax\n\t"
1781 "movq %rax,0xf8(%rcx)\n\t" /* context->Rip */
1782 "fxsave 0x100(%rcx)\n\t" /* context->FtlSave */
1783 "movdqa %xmm0,0x1a0(%rcx)\n\t" /* context->Xmm0 */
1784 "movdqa %xmm1,0x1b0(%rcx)\n\t" /* context->Xmm1 */
1785 "movdqa %xmm2,0x1c0(%rcx)\n\t" /* context->Xmm2 */
1786 "movdqa %xmm3,0x1d0(%rcx)\n\t" /* context->Xmm3 */
1787 "movdqa %xmm4,0x1e0(%rcx)\n\t" /* context->Xmm4 */
1788 "movdqa %xmm5,0x1f0(%rcx)\n\t" /* context->Xmm5 */
1789 "movdqa %xmm6,0x200(%rcx)\n\t" /* context->Xmm6 */
1790 "movdqa %xmm7,0x210(%rcx)\n\t" /* context->Xmm7 */
1791 "movdqa %xmm8,0x220(%rcx)\n\t" /* context->Xmm8 */
1792 "movdqa %xmm9,0x230(%rcx)\n\t" /* context->Xmm9 */
1793 "movdqa %xmm10,0x240(%rcx)\n\t" /* context->Xmm10 */
1794 "movdqa %xmm11,0x250(%rcx)\n\t" /* context->Xmm11 */
1795 "movdqa %xmm12,0x260(%rcx)\n\t" /* context->Xmm12 */
1796 "movdqa %xmm13,0x270(%rcx)\n\t" /* context->Xmm13 */
1797 "movdqa %xmm14,0x280(%rcx)\n\t" /* context->Xmm14 */
1798 "movdqa %xmm15,0x290(%rcx)\n\t" /* context->Xmm15 */
1799 "ret" );
1800
1801 /***********************************************************************
1802 * set_full_cpu_context
1803 *
1804 * Set the new CPU context.
1805 */
1806 extern void set_full_cpu_context( const CONTEXT *context );
1807 __ASM_GLOBAL_FUNC( set_full_cpu_context,
1808 "subq $40,%rsp\n\t"
1809 __ASM_CFI(".cfi_adjust_cfa_offset 40\n\t")
1810 "ldmxcsr 0x34(%rdi)\n\t" /* context->MxCsr */
1811 "movw 0x38(%rdi),%ax\n\t" /* context->SegCs */
1812 "movq %rax,8(%rsp)\n\t"
1813 "movw 0x42(%rdi),%ax\n\t" /* context->SegSs */
1814 "movq %rax,32(%rsp)\n\t"
1815 "movq 0x44(%rdi),%rax\n\t" /* context->Eflags */
1816 "movq %rax,16(%rsp)\n\t"
1817 "movq 0x80(%rdi),%rcx\n\t" /* context->Rcx */
1818 "movq 0x88(%rdi),%rdx\n\t" /* context->Rdx */
1819 "movq 0x90(%rdi),%rbx\n\t" /* context->Rbx */
1820 "movq 0x98(%rdi),%rax\n\t" /* context->Rsp */
1821 "movq %rax,24(%rsp)\n\t"
1822 "movq 0xa0(%rdi),%rbp\n\t" /* context->Rbp */
1823 "movq 0xa8(%rdi),%rsi\n\t" /* context->Rsi */
1824 "movq 0xb8(%rdi),%r8\n\t" /* context->R8 */
1825 "movq 0xc0(%rdi),%r9\n\t" /* context->R9 */
1826 "movq 0xc8(%rdi),%r10\n\t" /* context->R10 */
1827 "movq 0xd0(%rdi),%r11\n\t" /* context->R11 */
1828 "movq 0xd8(%rdi),%r12\n\t" /* context->R12 */
1829 "movq 0xe0(%rdi),%r13\n\t" /* context->R13 */
1830 "movq 0xe8(%rdi),%r14\n\t" /* context->R14 */
1831 "movq 0xf0(%rdi),%r15\n\t" /* context->R15 */
1832 "movq 0xf8(%rdi),%rax\n\t" /* context->Rip */
1833 "movq %rax,(%rsp)\n\t"
1834 "fxrstor 0x100(%rdi)\n\t" /* context->FtlSave */
1835 "movdqa 0x1a0(%rdi),%xmm0\n\t" /* context->Xmm0 */
1836 "movdqa 0x1b0(%rdi),%xmm1\n\t" /* context->Xmm1 */
1837 "movdqa 0x1c0(%rdi),%xmm2\n\t" /* context->Xmm2 */
1838 "movdqa 0x1d0(%rdi),%xmm3\n\t" /* context->Xmm3 */
1839 "movdqa 0x1e0(%rdi),%xmm4\n\t" /* context->Xmm4 */
1840 "movdqa 0x1f0(%rdi),%xmm5\n\t" /* context->Xmm5 */
1841 "movdqa 0x200(%rdi),%xmm6\n\t" /* context->Xmm6 */
1842 "movdqa 0x210(%rdi),%xmm7\n\t" /* context->Xmm7 */
1843 "movdqa 0x220(%rdi),%xmm8\n\t" /* context->Xmm8 */
1844 "movdqa 0x230(%rdi),%xmm9\n\t" /* context->Xmm9 */
1845 "movdqa 0x240(%rdi),%xmm10\n\t" /* context->Xmm10 */
1846 "movdqa 0x250(%rdi),%xmm11\n\t" /* context->Xmm11 */
1847 "movdqa 0x260(%rdi),%xmm12\n\t" /* context->Xmm12 */
1848 "movdqa 0x270(%rdi),%xmm13\n\t" /* context->Xmm13 */
1849 "movdqa 0x280(%rdi),%xmm14\n\t" /* context->Xmm14 */
1850 "movdqa 0x290(%rdi),%xmm15\n\t" /* context->Xmm15 */
1851 "movq 0x78(%rdi),%rax\n\t" /* context->Rax */
1852 "movq 0xb0(%rdi),%rdi\n\t" /* context->Rdi */
1853 "iretq" );
1854
1855
1856 /***********************************************************************
1857 * set_cpu_context
1858 *
1859 * Set the new CPU context. Used by NtSetContextThread.
1860 */
1861 void set_cpu_context( const CONTEXT *context )
1862 {
1863 DWORD flags = context->ContextFlags & ~CONTEXT_AMD64;
1864 if (flags & CONTEXT_FULL)
1865 {
1866 if (!(flags & CONTEXT_CONTROL))
1867 FIXME( "setting partial context (%x) not supported\n", flags );
1868 else
1869 set_full_cpu_context( context );
1870 }
1871 }
1872
1873
1874 /***********************************************************************
1875 * copy_context
1876 *
1877 * Copy a register context according to the flags.
1878 */
1879 void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
1880 {
1881 flags &= ~CONTEXT_AMD64; /* get rid of CPU id */
1882 if (flags & CONTEXT_CONTROL)
1883 {
1884 to->Rbp = from->Rbp;
1885 to->Rip = from->Rip;
1886 to->Rsp = from->Rsp;
1887 to->SegCs = from->SegCs;
1888 to->SegSs = from->SegSs;
1889 to->EFlags = from->EFlags;
1890 }
1891 if (flags & CONTEXT_INTEGER)
1892 {
1893 to->Rax = from->Rax;
1894 to->Rcx = from->Rcx;
1895 to->Rdx = from->Rdx;
1896 to->Rbx = from->Rbx;
1897 to->Rsi = from->Rsi;
1898 to->Rdi = from->Rdi;
1899 to->R8 = from->R8;
1900 to->R9 = from->R9;
1901 to->R10 = from->R10;
1902 to->R11 = from->R11;
1903 to->R12 = from->R12;
1904 to->R13 = from->R13;
1905 to->R14 = from->R14;
1906 to->R15 = from->R15;
1907 }
1908 if (flags & CONTEXT_SEGMENTS)
1909 {
1910 to->SegDs = from->SegDs;
1911 to->SegEs = from->SegEs;
1912 to->SegFs = from->SegFs;
1913 to->SegGs = from->SegGs;
1914 }
1915 if (flags & CONTEXT_FLOATING_POINT)
1916 {
1917 to->MxCsr = from->MxCsr;
1918 to->u.FltSave = from->u.FltSave;
1919 }
1920 if (flags & CONTEXT_DEBUG_REGISTERS)
1921 {
1922 to->Dr0 = from->Dr0;
1923 to->Dr1 = from->Dr1;
1924 to->Dr2 = from->Dr2;
1925 to->Dr3 = from->Dr3;
1926 to->Dr6 = from->Dr6;
1927 to->Dr7 = from->Dr7;
1928 }
1929 }
1930
1931
1932 /***********************************************************************
1933 * context_to_server
1934 *
1935 * Convert a register context to the server format.
1936 */
1937 NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
1938 {
1939 DWORD flags = from->ContextFlags & ~CONTEXT_AMD64; /* get rid of CPU id */
1940
1941 memset( to, 0, sizeof(*to) );
1942 to->cpu = CPU_x86_64;
1943
1944 if (flags & CONTEXT_CONTROL)
1945 {
1946 to->flags |= SERVER_CTX_CONTROL;
1947 to->ctl.x86_64_regs.rbp = from->Rbp;
1948 to->ctl.x86_64_regs.rip = from->Rip;
1949 to->ctl.x86_64_regs.rsp = from->Rsp;
1950 to->ctl.x86_64_regs.cs = from->SegCs;
1951 to->ctl.x86_64_regs.ss = from->SegSs;
1952 to->ctl.x86_64_regs.flags = from->EFlags;
1953 }
1954 if (flags & CONTEXT_INTEGER)
1955 {
1956 to->flags |= SERVER_CTX_INTEGER;
1957 to->integer.x86_64_regs.rax = from->Rax;
1958 to->integer.x86_64_regs.rcx = from->Rcx;
1959 to->integer.x86_64_regs.rdx = from->Rdx;
1960 to->integer.x86_64_regs.rbx = from->Rbx;
1961 to->integer.x86_64_regs.rsi = from->Rsi;
1962 to->integer.x86_64_regs.rdi = from->Rdi;
1963 to->integer.x86_64_regs.r8 = from->R8;
1964 to->integer.x86_64_regs.r9 = from->R9;
1965 to->integer.x86_64_regs.r10 = from->R10;
1966 to->integer.x86_64_regs.r11 = from->R11;
1967 to->integer.x86_64_regs.r12 = from->R12;
1968 to->integer.x86_64_regs.r13 = from->R13;
1969 to->integer.x86_64_regs.r14 = from->R14;
1970 to->integer.x86_64_regs.r15 = from->R15;
1971 }
1972 if (flags & CONTEXT_SEGMENTS)
1973 {
1974 to->flags |= SERVER_CTX_SEGMENTS;
1975 to->seg.x86_64_regs.ds = from->SegDs;
1976 to->seg.x86_64_regs.es = from->SegEs;
1977 to->seg.x86_64_regs.fs = from->SegFs;
1978 to->seg.x86_64_regs.gs = from->SegGs;
1979 }
1980 if (flags & CONTEXT_FLOATING_POINT)
1981 {
1982 to->flags |= SERVER_CTX_FLOATING_POINT;
1983 memcpy( to->fp.x86_64_regs.fpregs, &from->u.FltSave, sizeof(to->fp.x86_64_regs.fpregs) );
1984 }
1985 if (flags & CONTEXT_DEBUG_REGISTERS)
1986 {
1987 to->flags |= SERVER_CTX_DEBUG_REGISTERS;
1988 to->debug.x86_64_regs.dr0 = from->Dr0;
1989 to->debug.x86_64_regs.dr1 = from->Dr1;
1990 to->debug.x86_64_regs.dr2 = from->Dr2;
1991 to->debug.x86_64_regs.dr3 = from->Dr3;
1992 to->debug.x86_64_regs.dr6 = from->Dr6;
1993 to->debug.x86_64_regs.dr7 = from->Dr7;
1994 }
1995 return STATUS_SUCCESS;
1996 }
1997
1998
1999 /***********************************************************************
2000 * context_from_server
2001 *
2002 * Convert a register context from the server format.
2003 */
2004 NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
2005 {
2006 if (from->cpu != CPU_x86_64) return STATUS_INVALID_PARAMETER;
2007
2008 to->ContextFlags = CONTEXT_AMD64;
2009 if (from->flags & SERVER_CTX_CONTROL)
2010 {
2011 to->ContextFlags |= CONTEXT_CONTROL;
2012 to->Rbp = from->ctl.x86_64_regs.rbp;
2013 to->Rip = from->ctl.x86_64_regs.rip;
2014 to->Rsp = from->ctl.x86_64_regs.rsp;
2015 to->SegCs = from->ctl.x86_64_regs.cs;
2016 to->SegSs = from->ctl.x86_64_regs.ss;
2017 to->EFlags = from->ctl.x86_64_regs.flags;
2018 }
2019
2020 if (from->flags & SERVER_CTX_INTEGER)
2021 {
2022 to->ContextFlags |= CONTEXT_INTEGER;
2023 to->Rax = from->integer.x86_64_regs.rax;
2024 to->Rcx = from->integer.x86_64_regs.rcx;
2025 to->Rdx = from->integer.x86_64_regs.rdx;
2026 to->Rbx = from->integer.x86_64_regs.rbx;
2027 to->Rsi = from->integer.x86_64_regs.rsi;
2028 to->Rdi = from->integer.x86_64_regs.rdi;
2029 to->R8 = from->integer.x86_64_regs.r8;
2030 to->R9 = from->integer.x86_64_regs.r9;
2031 to->R10 = from->integer.x86_64_regs.r10;
2032 to->R11 = from->integer.x86_64_regs.r11;
2033 to->R12 = from->integer.x86_64_regs.r12;
2034 to->R13 = from->integer.x86_64_regs.r13;
2035 to->R14 = from->integer.x86_64_regs.r14;
2036 to->R15 = from->integer.x86_64_regs.r15;
2037 }
2038 if (from->flags & SERVER_CTX_SEGMENTS)
2039 {
2040 to->ContextFlags |= CONTEXT_SEGMENTS;
2041 to->SegDs = from->seg.x86_64_regs.ds;
2042 to->SegEs = from->seg.x86_64_regs.es;
2043 to->SegFs = from->seg.x86_64_regs.fs;
2044 to->SegGs = from->seg.x86_64_regs.gs;
2045 }
2046 if (from->flags & SERVER_CTX_FLOATING_POINT)
2047 {
2048 to->ContextFlags |= CONTEXT_FLOATING_POINT;
2049 memcpy( &to->u.FltSave, from->fp.x86_64_regs.fpregs, sizeof(from->fp.x86_64_regs.fpregs) );
2050 to->MxCsr = to->u.FltSave.MxCsr;
2051 }
2052 if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
2053 {
2054 to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
2055 to->Dr0 = from->debug.x86_64_regs.dr0;
2056 to->Dr1 = from->debug.x86_64_regs.dr1;
2057 to->Dr2 = from->debug.x86_64_regs.dr2;
2058 to->Dr3 = from->debug.x86_64_regs.dr3;
2059 to->Dr6 = from->debug.x86_64_regs.dr6;
2060 to->Dr7 = from->debug.x86_64_regs.dr7;
2061 }
2062 return STATUS_SUCCESS;
2063 }
2064
2065
2066 extern void raise_func_trampoline( EXCEPTION_RECORD *rec, CONTEXT *context, raise_func func );
2067 __ASM_GLOBAL_FUNC( raise_func_trampoline,
2068 __ASM_CFI(".cfi_signal_frame\n\t")
2069 __ASM_CFI(".cfi_def_cfa %rbp,144\n\t") /* red zone + rip + rbp */
2070 __ASM_CFI(".cfi_rel_offset %rip,8\n\t")
2071 __ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
2072 "call *%rdx\n\t"
2073 "int $3")
2074
2075 /***********************************************************************
2076 * setup_exception
2077 *
2078 * Setup a proper stack frame for the raise function, and modify the
2079 * sigcontext so that the return from the signal handler will call
2080 * the raise function.
2081 */
2082 static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func )
2083 {
2084 struct stack_layout
2085 {
2086 CONTEXT context;
2087 EXCEPTION_RECORD rec;
2088 ULONG64 rbp;
2089 ULONG64 rip;
2090 ULONG64 red_zone[16];
2091 } *stack;
2092 ULONG64 *rsp_ptr;
2093 DWORD exception_code = 0;
2094
2095 stack = (struct stack_layout *)(RSP_sig(sigcontext) & ~15);
2096
2097 /* stack sanity checks */
2098
2099 if (is_inside_signal_stack( stack ))
2100 {
2101 ERR( "nested exception on signal stack in thread %04x eip %016lx esp %016lx stack %p-%p\n",
2102 GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext),
2103 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2104 abort_thread(1);
2105 }
2106
2107 if (stack - 1 > stack || /* check for overflow in subtraction */
2108 (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack ||
2109 (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
2110 {
2111 WARN( "exception outside of stack limits in thread %04x eip %016lx esp %016lx stack %p-%p\n",
2112 GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext),
2113 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2114 }
2115 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096)
2116 {
2117 /* stack overflow on last page, unrecoverable */
2118 UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1);
2119 ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
2120 diff, GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext),
2121 (ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
2122 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2123 abort_thread(1);
2124 }
2125 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit)
2126 {
2127 /* stack access below stack limit, may be recoverable */
2128 if (virtual_handle_stack_fault( stack - 1 )) exception_code = EXCEPTION_STACK_OVERFLOW;
2129 else
2130 {
2131 UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1);
2132 ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
2133 diff, GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext),
2134 (ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
2135 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2136 abort_thread(1);
2137 }
2138 }
2139
2140 stack--; /* push the stack_layout structure */
2141 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
2142 VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack));
2143 #elif defined(VALGRIND_MAKE_WRITABLE)
2144 VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack));
2145 #endif
2146 stack->rec.ExceptionRecord = NULL;
2147 stack->rec.ExceptionCode = exception_code;
2148 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
2149 stack->rec.ExceptionAddress = (void *)RIP_sig(sigcontext);
2150 stack->rec.NumberParameters = 0;
2151 save_context( &stack->context, sigcontext );
2152
2153 /* store return address and %rbp without aligning, so that the offset is fixed */
2154 rsp_ptr = (ULONG64 *)RSP_sig(sigcontext) - 16;
2155 *(--rsp_ptr) = RIP_sig(sigcontext);
2156 *(--rsp_ptr) = RBP_sig(sigcontext);
2157
2158 /* now modify the sigcontext to return to the raise function */
2159 RIP_sig(sigcontext) = (ULONG_PTR)raise_func_trampoline;
2160 RDI_sig(sigcontext) = (ULONG_PTR)&stack->rec;
2161 RSI_sig(sigcontext) = (ULONG_PTR)&stack->context;
2162 RDX_sig(sigcontext) = (ULONG_PTR)func;
2163 RBP_sig(sigcontext) = (ULONG_PTR)rsp_ptr;
2164 RSP_sig(sigcontext) = (ULONG_PTR)stack;
2165 /* clear single-step, direction, and align check flag */
2166 EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
2167
2168 return &stack->rec;
2169 }
2170
2171
2172 /***********************************************************************
2173 * get_exception_context
2174 *
2175 * Get a pointer to the context built by setup_exception.
2176 */
2177 static inline CONTEXT *get_exception_context( EXCEPTION_RECORD *rec )
2178 {
2179 return (CONTEXT *)rec - 1; /* cf. stack_layout structure */
2180 }
2181
2182
2183 /**********************************************************************
2184 * find_function_info
2185 */
2186 static RUNTIME_FUNCTION *find_function_info( ULONG64 pc, HMODULE module,
2187 RUNTIME_FUNCTION *func, ULONG size )
2188 {
2189 int min = 0;
2190 int max = size/sizeof(*func) - 1;
2191
2192 while (min <= max)
2193 {
2194 int pos = (min + max) / 2;
2195 if ((char *)pc < (char *)module + func[pos].BeginAddress) max = pos - 1;
2196 else if ((char *)pc >= (char *)module + func[pos].EndAddress) min = pos + 1;
2197 else
2198 {
2199 func += pos;
2200 while (func->UnwindData & 1) /* follow chained entry */
2201 func = (RUNTIME_FUNCTION *)((char *)module + (func->UnwindData & ~1));
2202 return func;
2203 }
2204 }
2205 return NULL;
2206 }
2207
2208 /**********************************************************************
2209 * lookup_function_info
2210 */
2211 static RUNTIME_FUNCTION *lookup_function_info( ULONG64 pc, ULONG64 *base, LDR_MODULE **module )
2212 {
2213 RUNTIME_FUNCTION *func = NULL;
2214 struct dynamic_unwind_entry *entry;
2215 ULONG size;
2216
2217 /* PE module or wine module */
2218 if (!LdrFindEntryForAddress( (void *)pc, module ))
2219 {
2220 *base = (ULONG64)(*module)->BaseAddress;
2221 if ((func = RtlImageDirectoryEntryToData( (*module)->BaseAddress, TRUE,
2222 IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )))
2223 {
2224 /* lookup in function table */
2225 func = find_function_info( pc, (*module)->BaseAddress, func, size );
2226 }
2227 }
2228 else
2229 {
2230 *module = NULL;
2231
2232 RtlEnterCriticalSection( &dynamic_unwind_section );
2233 LIST_FOR_EACH_ENTRY( entry, &dynamic_unwind_list, struct dynamic_unwind_entry, entry )
2234 {
2235 if (pc >= entry->base && pc < entry->base + entry->size)
2236 {
2237 *base = entry->base;
2238
2239 /* use callback or lookup in function table */
2240 if (entry->callback)
2241 func = entry->callback( pc, entry->context );
2242 else
2243 func = find_function_info( pc, (HMODULE)entry->base, entry->table, entry->table_size );
2244 break;
2245 }
2246 }
2247 RtlLeaveCriticalSection( &dynamic_unwind_section );
2248 }
2249
2250 return func;
2251 }
2252
2253 static DWORD nested_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
2254 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
2255 {
2256 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) return ExceptionContinueSearch;
2257
2258 /* FIXME */
2259 return ExceptionNestedException;
2260 }
2261
2262 /**********************************************************************
2263 * call_handler
2264 *
2265 * Call a single exception handler.
2266 * FIXME: Handle nested exceptions.
2267 */
2268 static DWORD call_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch )
2269 {
2270 EXCEPTION_REGISTRATION_RECORD frame;
2271 DWORD res;
2272
2273 frame.Handler = nested_exception_handler;
2274 __wine_push_frame( &frame );
2275
2276 TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
2277 dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
2278 res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, context, dispatch );
2279 TRACE( "handler at %p returned %u\n", dispatch->LanguageHandler, res );
2280
2281 __wine_pop_frame( &frame );
2282 return res;
2283 }
2284
2285
2286 /**********************************************************************
2287 * call_teb_handler
2288 *
2289 * Call a single exception handler from the TEB chain.
2290 * FIXME: Handle nested exceptions.
2291 */
2292 static DWORD call_teb_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch,
2293 EXCEPTION_REGISTRATION_RECORD *teb_frame )
2294 {
2295 DWORD res;
2296
2297 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
2298 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
2299 res = teb_frame->Handler( rec, teb_frame, context, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
2300 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
2301 return res;
2302 }
2303
2304
2305 /**********************************************************************
2306 * call_stack_handlers
2307 *
2308 * Call the stack handlers chain.
2309 */
2310 static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *orig_context )
2311 {
2312 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
2313 UNWIND_HISTORY_TABLE table;
2314 DISPATCHER_CONTEXT dispatch;
2315 CONTEXT context;
2316 LDR_MODULE *module;
2317 NTSTATUS status;
2318
2319 context = *orig_context;
2320 dispatch.TargetIp = 0;
2321 dispatch.ContextRecord = &context;
2322 dispatch.HistoryTable = &table;
2323 for (;;)
2324 {
2325 /* FIXME: should use the history table to make things faster */
2326
2327 dispatch.ImageBase = 0;
2328 dispatch.ControlPc = context.Rip;
2329 dispatch.ScopeIndex = 0;
2330
2331 /* first look for PE exception information */
2332
2333 if ((dispatch.FunctionEntry = lookup_function_info( dispatch.ControlPc, &dispatch.ImageBase, &module )))
2334 {
2335 dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_EHANDLER, dispatch.ImageBase,
2336 dispatch.ControlPc, dispatch.FunctionEntry,
2337 &context, &dispatch.HandlerData,
2338 &dispatch.EstablisherFrame, NULL );
2339 goto unwind_done;
2340 }
2341
2342 /* then look for host system exception information */
2343
2344 if (!module || (module->Flags & LDR_WINE_INTERNAL))
2345 {
2346 BOOL got_info = FALSE;
2347 struct dwarf_eh_bases bases;
2348 const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(dispatch.ControlPc - 1), &bases );
2349
2350 if (fde)
2351 {
2352 status = dwarf_virtual_unwind( dispatch.ControlPc, &dispatch.EstablisherFrame, &context,
2353 fde, &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
2354 if (status != STATUS_SUCCESS) return status;
2355 got_info = TRUE;
2356 }
2357 #ifdef HAVE_LIBUNWIND_H
2358 else
2359 {
2360 status = libunwind_virtual_unwind( dispatch.ControlPc, &got_info, &dispatch.EstablisherFrame, &context,
2361 &dispatch.LanguageHandler, &dispatch.HandlerData );
2362 if (status != STATUS_SUCCESS) return status;
2363 }
2364 #endif
2365
2366 if (got_info)
2367 {
2368 dispatch.FunctionEntry = NULL;
2369 if (dispatch.LanguageHandler && !module)
2370 {
2371 FIXME( "calling personality routine in system library not supported yet\n" );
2372 dispatch.LanguageHandler = NULL;
2373 }
2374 goto unwind_done;
2375 }
2376 }
2377 else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
2378
2379 context.Rip = *(ULONG64 *)context.Rsp;
2380 context.Rsp = context.Rsp + sizeof(ULONG64);
2381 dispatch.EstablisherFrame = context.Rsp;
2382 dispatch.LanguageHandler = NULL;
2383
2384 unwind_done:
2385 if (!dispatch.EstablisherFrame) break;
2386
2387 if ((dispatch.EstablisherFrame & 7) ||
2388 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
2389 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
2390 {
2391 ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
2392 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
2393 rec->ExceptionFlags |= EH_STACK_INVALID;
2394 break;
2395 }
2396
2397 if (dispatch.LanguageHandler)
2398 {
2399 switch (call_handler( rec, orig_context, &dispatch ))
2400 {
2401 case ExceptionContinueExecution:
2402 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
2403 return STATUS_SUCCESS;
2404 case ExceptionContinueSearch:
2405 break;
2406 case ExceptionNestedException:
2407 FIXME( "nested exception\n" );
2408 break;
2409 case ExceptionCollidedUnwind: {
2410 ULONG64 frame;
2411
2412 context = *dispatch.ContextRecord;
2413 dispatch.ContextRecord = &context;
2414 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
2415 dispatch.ControlPc, dispatch.FunctionEntry,
2416 &context, NULL, &frame, NULL );
2417 goto unwind_done;
2418 }
2419 default:
2420 return STATUS_INVALID_DISPOSITION;
2421 }
2422 }
2423 /* hack: call wine handlers registered in the tib list */
2424 else while ((ULONG64)teb_frame < context.Rsp)
2425 {
2426 TRACE( "found wine frame %p rsp %lx handler %p\n",
2427 teb_frame, context.Rsp, teb_frame->Handler );
2428 dispatch.EstablisherFrame = (ULONG64)teb_frame;
2429 switch (call_teb_handler( rec, orig_context, &dispatch, teb_frame ))
2430 {
2431 case ExceptionContinueExecution:
2432 if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
2433 return STATUS_SUCCESS;
2434 case ExceptionContinueSearch:
2435 break;
2436 case ExceptionNestedException:
2437 FIXME( "nested exception\n" );
2438 break;
2439 case ExceptionCollidedUnwind: {
2440 ULONG64 frame;
2441
2442 context = *dispatch.ContextRecord;
2443 dispatch.ContextRecord = &context;
2444 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
2445 dispatch.ControlPc, dispatch.FunctionEntry,
2446 &context, NULL, &frame, NULL );
2447 teb_frame = teb_frame->Prev;
2448 goto unwind_done;
2449 }
2450 default:
2451 return STATUS_INVALID_DISPOSITION;
2452 }
2453 teb_frame = teb_frame->Prev;
2454 }
2455
2456 if (context.Rsp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break;
2457 }
2458 return STATUS_UNHANDLED_EXCEPTION;
2459 }
2460
2461
2462 /*******************************************************************
2463 * raise_exception
2464 *
2465 * Implementation of NtRaiseException.
2466 */
2467 static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
2468 {
2469 NTSTATUS status;
2470
2471 if (first_chance)
2472 {
2473 DWORD c;
2474
2475 TRACE( "code=%x flags=%x addr=%p ip=%lx tid=%04x\n",
2476 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
2477 context->Rip, GetCurrentThreadId() );
2478 for (c = 0; c < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); c++)
2479 TRACE( " info[%d]=%016lx\n", c, rec->ExceptionInformation[c] );
2480 if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
2481 {
2482 if (rec->ExceptionInformation[1] >> 16)
2483 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
2484 rec->ExceptionAddress,
2485 (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
2486 else
2487 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
2488 rec->ExceptionAddress,
2489 (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
2490 }
2491 else
2492 {
2493 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
2494 context->Rax, context->Rbx, context->Rcx, context->Rdx );
2495 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
2496 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
2497 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
2498 context->R8, context->R9, context->R10, context->R11 );
2499 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
2500 context->R12, context->R13, context->R14, context->R15 );
2501 }
2502 status = send_debug_event( rec, TRUE, context );
2503 if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
2504 return STATUS_SUCCESS;
2505
2506 /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
2507 if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Rip--;
2508
2509 if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
2510 return STATUS_SUCCESS;
2511
2512 if ((status = call_stack_handlers( rec, context )) != STATUS_UNHANDLED_EXCEPTION)
2513 return status;
2514 }
2515
2516 /* last chance exception */
2517
2518 status = send_debug_event( rec, FALSE, context );
2519 if (status != DBG_CONTINUE)
2520 {
2521 if (rec->ExceptionFlags & EH_STACK_INVALID)
2522 ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
2523 else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
2524 ERR("Process attempted to continue execution after noncontinuable exception.\n");
2525 else
2526 ERR("Unhandled exception code %x flags %x addr %p\n",
2527 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
2528 NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
2529 }
2530 return STATUS_SUCCESS;
2531 }
2532
2533
2534 /**********************************************************************
2535 * raise_segv_exception
2536 */
2537 static void raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2538 {
2539 NTSTATUS status;
2540
2541 switch(rec->ExceptionCode)
2542 {
2543 case EXCEPTION_ACCESS_VIOLATION:
2544 if (rec->NumberParameters == 2)
2545 {
2546 if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
2547 rec->ExceptionInformation[0], FALSE )))
2548 set_cpu_context( context );
2549 }
2550 break;
2551 case EXCEPTION_BREAKPOINT:
2552 switch (rec->ExceptionInformation[0])
2553 {
2554 case 1: /* BREAKPOINT_PRINT */
2555 case 3: /* BREAKPOINT_LOAD_SYMBOLS */
2556 case 4: /* BREAKPOINT_UNLOAD_SYMBOLS */
2557 case 5: /* BREAKPOINT_COMMAND_STRING (>= Win2003) */
2558 goto done;
2559 }
2560 break;
2561 }
2562 status = raise_exception( rec, context, TRUE );
2563 if (status) raise_status( status, rec );
2564 done:
2565 set_cpu_context( context );
2566 }
2567
2568
2569 /**********************************************************************
2570 * raise_generic_exception
2571 *
2572 * Generic raise function for exceptions that don't need special treatment.
2573 */
2574 static void raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2575 {
2576 NTSTATUS status = raise_exception( rec, context, TRUE );
2577 if (status) raise_status( status, rec );
2578 set_cpu_context( context );
2579 }
2580
2581
2582 /***********************************************************************
2583 * handle_interrupt
2584 *
2585 * Handle an interrupt.
2586 */
2587 static inline BOOL handle_interrupt( unsigned int interrupt, EXCEPTION_RECORD *rec, CONTEXT *context )
2588 {
2589 switch(interrupt)
2590 {
2591 case 0x2d:
2592 context->Rip += 3;
2593 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
2594 rec->ExceptionAddress = (void *)context->Rip;
2595 rec->NumberParameters = 1;
2596 rec->ExceptionInformation[0] = context->Rax;
2597 return TRUE;
2598 default:
2599 return FALSE;
2600 }
2601 }
2602
2603
2604 /**********************************************************************
2605 * segv_handler
2606 *
2607 * Handler for SIGSEGV and related errors.
2608 */
2609 static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2610 {
2611 EXCEPTION_RECORD *rec;
2612 ucontext_t *ucontext = sigcontext;
2613
2614 /* check for page fault inside the thread stack */
2615 if (TRAP_sig(ucontext) == TRAP_x86_PAGEFLT &&
2616 (char *)siginfo->si_addr >= (char *)NtCurrentTeb()->DeallocationStack &&
2617 (char *)siginfo->si_addr < (char *)NtCurrentTeb()->Tib.StackBase &&
2618 virtual_handle_stack_fault( siginfo->si_addr ))
2619 {
2620 /* check if this was the last guard page */
2621 if ((char *)siginfo->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096)
2622 {
2623 rec = setup_exception( sigcontext, raise_segv_exception );
2624 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2625 }
2626 return;
2627 }
2628
2629 rec = setup_exception( sigcontext, raise_segv_exception );
2630 if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return;
2631
2632 switch(TRAP_sig(ucontext))
2633 {
2634 case TRAP_x86_OFLOW: /* Overflow exception */
2635 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2636 break;
2637 case TRAP_x86_BOUND: /* Bound range exception */
2638 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2639 break;
2640 case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
2641 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2642 break;
2643 case TRAP_x86_STKFLT: /* Stack fault */
2644 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2645 break;
2646 case TRAP_x86_SEGNPFLT: /* Segment not present exception */
2647 case TRAP_x86_PROTFLT: /* General protection fault */
2648 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2649 {
2650 CONTEXT *win_context = get_exception_context( rec );
2651 WORD err = ERROR_sig(ucontext);
2652 if ((err & 7) == 2 && handle_interrupt( err >> 3, rec, win_context )) break;
2653 rec->ExceptionCode = err ? EXCEPTION_ACCESS_VIOLATION : EXCEPTION_PRIV_INSTRUCTION;
2654 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2655 }
2656 break;
2657 case TRAP_x86_PAGEFLT: /* Page fault */
2658 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2659 rec->NumberParameters = 2;
2660 rec->ExceptionInformation[0] = (ERROR_sig(ucontext) & 2) != 0;
2661 rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
2662 break;
2663 case TRAP_x86_ALIGNFLT: /* Alignment check exception */
2664 rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
2665 break;
2666 default:
2667 ERR( "Got unexpected trap %ld\n", (ULONG_PTR)TRAP_sig(ucontext) );
2668 /* fall through */
2669 case TRAP_x86_NMI: /* NMI interrupt */
2670 case TRAP_x86_DNA: /* Device not available exception */
2671 case TRAP_x86_DOUBLEFLT: /* Double fault exception */
2672 case TRAP_x86_TSSFLT: /* Invalid TSS exception */
2673 case TRAP_x86_MCHK: /* Machine check exception */
2674 case TRAP_x86_CACHEFLT: /* Cache flush exception */
2675 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2676 break;
2677 }
2678 }
2679
2680 /**********************************************************************
2681 * trap_handler
2682 *
2683 * Handler for SIGTRAP.
2684 */
2685 static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2686 {
2687 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2688
2689 switch (siginfo->si_code)
2690 {
2691 case TRAP_TRACE: /* Single-step exception */
2692 case 4 /* TRAP_HWBKPT */: /* Hardware breakpoint exception */
2693 rec->ExceptionCode = EXCEPTION_SINGLE_STEP;
2694 break;
2695 case TRAP_BRKPT: /* Breakpoint exception */
2696 rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */
2697 /* fall through */
2698 default:
2699 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
2700 rec->NumberParameters = 1;
2701 rec->ExceptionInformation[0] = 0;
2702 break;
2703 }
2704 }
2705
2706 /**********************************************************************
2707 * fpe_handler
2708 *
2709 * Handler for SIGFPE.
2710 */
2711 static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2712 {
2713 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2714
2715 switch (siginfo->si_code)
2716 {
2717 case FPE_FLTSUB:
2718 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2719 break;
2720 case FPE_INTDIV:
2721 rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
2722 break;
2723 case FPE_INTOVF:
2724 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2725 break;
2726 case FPE_FLTDIV:
2727 rec->ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
2728 break;
2729 case FPE_FLTOVF:
2730 rec->ExceptionCode = EXCEPTION_FLT_OVERFLOW;
2731 break;
2732 case FPE_FLTUND:
2733 rec->ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
2734 break;
2735 case FPE_FLTRES:
2736 rec->ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
2737 break;
2738 case FPE_FLTINV:
2739 default:
2740 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2741 break;
2742 }
2743 }
2744
2745 /**********************************************************************
2746 * int_handler
2747 *
2748 * Handler for SIGINT.
2749 */
2750 static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2751 {
2752 if (!dispatch_signal(SIGINT))
2753 {
2754 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2755 rec->ExceptionCode = CONTROL_C_EXIT;
2756 }
2757 }
2758
2759
2760 /**********************************************************************
2761 * abrt_handler
2762 *
2763 * Handler for SIGABRT.
2764 */
2765 static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2766 {
2767 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2768 rec->ExceptionCode = EXCEPTION_WINE_ASSERTION;
2769 rec->ExceptionFlags = EH_NONCONTINUABLE;
2770 }
2771
2772
2773 /**********************************************************************
2774 * quit_handler
2775 *
2776 * Handler for SIGQUIT.
2777 */
2778 static void quit_handler( int signal, siginfo_t *siginfo, void *ucontext )
2779 {
2780 abort_thread(0);
2781 }
2782
2783
2784 /**********************************************************************
2785 * usr1_handler
2786 *
2787 * Handler for SIGUSR1, used to signal a thread that it got suspended.
2788 */
2789 static void usr1_handler( int signal, siginfo_t *siginfo, void *ucontext )
2790 {
2791 CONTEXT context;
2792
2793 save_context( &context, ucontext );
2794 wait_suspend( &context );
2795 restore_context( &context, ucontext );
2796 }
2797
2798
2799 /***********************************************************************
2800 * __wine_set_signal_handler (NTDLL.@)
2801 */
2802 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
2803 {
2804 if (sig >= sizeof(handlers) / sizeof(handlers[0])) return -1;
2805 if (handlers[sig] != NULL) return -2;
2806 handlers[sig] = wsh;
2807 return 0;
2808 }
2809
2810
2811 /**********************************************************************
2812 * signal_alloc_thread
2813 */
2814 NTSTATUS signal_alloc_thread( TEB **teb )
2815 {
2816 static size_t sigstack_zero_bits;
2817 SIZE_T size;
2818 NTSTATUS status;
2819
2820 if (!sigstack_zero_bits)
2821 {
2822 size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
2823 /* find the first power of two not smaller than min_size */
2824 sigstack_zero_bits = 12;
2825 while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
2826 signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
2827 assert( sizeof(TEB) <= teb_size );
2828 }
2829
2830 size = 1 << sigstack_zero_bits;
2831 *teb = NULL;
2832 if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
2833 &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
2834 {
2835 (*teb)->Tib.Self = &(*teb)->Tib;
2836 (*teb)->Tib.ExceptionList = (void *)~0UL;
2837 }
2838 return status;
2839 }
2840
2841
2842 /**********************************************************************
2843 * signal_free_thread
2844 */
2845 void signal_free_thread( TEB *teb )
2846 {
2847 SIZE_T size;
2848
2849 if (teb->DeallocationStack)
2850 {
2851 size = 0;
2852 NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
2853 }
2854 size = 0;
2855 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
2856 }
2857
2858 #ifdef __APPLE__
2859 /**********************************************************************
2860 * mac_thread_gsbase
2861 */
2862 static void *mac_thread_gsbase(void)
2863 {
2864 static int gsbase_offset = -1;
2865 void *ret;
2866
2867 if (gsbase_offset < 0)
2868 {
2869 /* Search for the array of TLS slots within the pthread data structure.
2870 That's what the macOS pthread implementation uses for gsbase. */
2871 const void* const sentinel1 = (const void*)0x2bffb6b4f11228ae;
2872 const void* const sentinel2 = (const void*)0x0845a7ff6ab76707;
2873 int rc;
2874 pthread_key_t key;
2875 const void** p = (const void**)pthread_self();
2876 int i;
2877
2878 gsbase_offset = 0;
2879 if ((rc = pthread_key_create(&key, NULL)))
2880 {
2881 ERR("failed to create sentinel key for gsbase search: %d\n", rc);
2882 return NULL;
2883 }
2884
2885 pthread_setspecific(key, sentinel1);
2886
2887 for (i = key + 1; i < 2000; i++) /* arbitrary limit */
2888 {
2889 if (p[i] == sentinel1)
2890 {
2891 pthread_setspecific(key, sentinel2);
2892
2893 if (p[i] == sentinel2)
2894 {
2895 gsbase_offset = (i - key) * sizeof(*p);
2896 break;
2897 }
2898
2899 pthread_setspecific(key, sentinel1);
2900 }
2901 }
2902
2903 pthread_key_delete(key);
2904 }
2905
2906 if (gsbase_offset)
2907 {
2908 ret = (char*)pthread_self() + gsbase_offset;
2909 TRACE("pthread_self() %p + offset 0x%08x -> gsbase %p\n", pthread_self(), gsbase_offset, ret);
2910 }
2911 else
2912 {
2913 ret = NULL;
2914 ERR("failed to locate gsbase; won't be able to poke ThreadLocalStoragePointer into pthread TLS; expect crashes\n");
2915 }
2916
2917 return ret;
2918 }
2919 #endif
2920
2921 /**********************************************************************
2922 * signal_init_thread
2923 */
2924 void signal_init_thread( TEB *teb )
2925 {
2926 const WORD fpu_cw = 0x27f;
2927 stack_t ss;
2928
2929 #if defined __linux__
2930 arch_prctl( ARCH_SET_GS, teb );
2931 #elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
2932 amd64_set_gsbase( teb );
2933 #elif defined(__NetBSD__)
2934 sysarch( X86_64_SET_GSBASE, &teb );
2935 #elif defined (__APPLE__)
2936 __asm__ volatile (".byte 0x65\n\tmovq %0,%c1"
2937 :
2938 : "r" (teb->Tib.Self), "n" (FIELD_OFFSET(TEB, Tib.Self)));
2939 __asm__ volatile (".byte 0x65\n\tmovq %0,%c1"
2940 :
2941 : "r" (teb->ThreadLocalStoragePointer), "n" (FIELD_OFFSET(TEB, ThreadLocalStoragePointer)));
2942
2943 /* alloc_tls_slot() needs to poke a value to an address relative to each
2944 thread's gsbase. Have each thread record its gsbase pointer into its
2945 TEB so alloc_tls_slot() can find it. */
2946 teb->Reserved5[0] = mac_thread_gsbase();
2947 #else
2948 # error Please define setting %gs for your architecture
2949 #endif
2950
2951 ss.ss_sp = (char *)teb + teb_size;
2952 ss.ss_size = signal_stack_size;
2953 ss.ss_flags = 0;
2954 if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
2955
2956 #ifdef __GNUC__
2957 __asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
2958 #else
2959 FIXME("FPU setup not implemented for this platform.\n");
2960 #endif
2961 }
2962
2963 /**********************************************************************
2964 * signal_init_process
2965 */
2966 void signal_init_process(void)
2967 {
2968 struct sigaction sig_act;
2969
2970 sig_act.sa_mask = server_block_set;
2971 sig_act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
2972
2973 sig_act.sa_sigaction = int_handler;
2974 if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
2975 sig_act.sa_sigaction = fpe_handler;
2976 if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
2977 sig_act.sa_sigaction = abrt_handler;
2978 if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
2979 sig_act.sa_sigaction = quit_handler;
2980 if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
2981 sig_act.sa_sigaction = usr1_handler;
2982 if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
2983
2984 sig_act.sa_sigaction = segv_handler;
2985 if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
2986 if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
2987 #ifdef SIGBUS
2988 if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
2989 #endif
2990
2991 #ifdef SIGTRAP
2992 sig_act.sa_sigaction = trap_handler;
2993 if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
2994 #endif
2995 return;
2996
2997 error:
2998 perror("sigaction");
2999 exit(1);
3000 }
3001
3002
3003 /**********************************************************************
3004 * RtlAddFunctionTable (NTDLL.@)
3005 */
3006 BOOLEAN CDECL RtlAddFunctionTable( RUNTIME_FUNCTION *table, DWORD count, DWORD64 addr )
3007 {
3008 struct dynamic_unwind_entry *entry;
3009
3010 TRACE( "%p %u %lx\n", table, count, addr );
3011
3012 /* NOTE: Windows doesn't check if table is aligned or a NULL pointer */
3013
3014 entry = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*entry) );
3015 if (!entry)
3016 return FALSE;
3017
3018 entry->base = addr;
3019 entry->size = table[count - 1].EndAddress;
3020 entry->table = table;
3021 entry->table_size = count * sizeof(RUNTIME_FUNCTION);
3022 entry->callback = NULL;
3023 entry->context = NULL;
3024
3025 RtlEnterCriticalSection( &dynamic_unwind_section );
3026 list_add_tail( &dynamic_unwind_list, &entry->entry );
3027 RtlLeaveCriticalSection( &dynamic_unwind_section );
3028
3029 return TRUE;
3030 }
3031
3032
3033 /**********************************************************************
3034 * RtlInstallFunctionTableCallback (NTDLL.@)
3035 */
3036 BOOLEAN CDECL RtlInstallFunctionTableCallback( DWORD64 table, DWORD64 base, DWORD length,
3037 PGET_RUNTIME_FUNCTION_CALLBACK callback, PVOID context, PCWSTR dll )
3038 {
3039 struct dynamic_unwind_entry *entry;
3040
3041 TRACE( "%lx %lx %d %p %p %s\n", table, base, length, callback, context, wine_dbgstr_w(dll) );
3042
3043 /* NOTE: Windows doesn't check if the provided callback is a NULL pointer */
3044
3045 /* both low-order bits must be set */
3046 if ((table & 0x3) != 0x3)
3047 return FALSE;
3048
3049 entry = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*entry) );
3050 if (!entry)
3051 return FALSE;
3052
3053 entry->base = base;
3054 entry->size = length;
3055 entry->table = (RUNTIME_FUNCTION *)table;
3056 entry->table_size = 0;
3057 entry->callback = callback;
3058 entry->context = context;
3059
3060 RtlEnterCriticalSection( &dynamic_unwind_section );
3061 list_add_tail( &dynamic_unwind_list, &entry->entry );
3062 RtlLeaveCriticalSection( &dynamic_unwind_section );
3063
3064 return TRUE;
3065 }
3066
3067
3068 /**********************************************************************
3069 * RtlDeleteFunctionTable (NTDLL.@)
3070 */
3071 BOOLEAN CDECL RtlDeleteFunctionTable( RUNTIME_FUNCTION *table )
3072 {
3073 struct dynamic_unwind_entry *entry, *to_free = NULL;
3074
3075 TRACE( "%p\n", table );
3076
3077 RtlEnterCriticalSection( &dynamic_unwind_section );
3078 LIST_FOR_EACH_ENTRY( entry, &dynamic_unwind_list, struct dynamic_unwind_entry, entry )
3079 {
3080 if (entry->table == table)
3081 {
3082 to_free = entry;
3083 list_remove( &entry->entry );
3084 break;
3085 }
3086 }
3087 RtlLeaveCriticalSection( &dynamic_unwind_section );
3088
3089 if (!to_free)
3090 return FALSE;
3091
3092 RtlFreeHeap( GetProcessHeap(), 0, to_free );
3093 return TRUE;
3094 }
3095
3096
3097 /**********************************************************************
3098 * RtlLookupFunctionEntry (NTDLL.@)
3099 */
3100 PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry( ULONG64 pc, ULONG64 *base, UNWIND_HISTORY_TABLE *table )
3101 {
3102 LDR_MODULE *module;
3103 RUNTIME_FUNCTION *func;
3104
3105 /* FIXME: should use the history table to make things faster */
3106
3107 func = lookup_function_info( pc, base, &module );
3108 if (!func)
3109 {
3110 *base = 0;
3111 if (module)
3112 WARN( "no exception table found in module %p pc %lx\n", module->BaseAddress, pc );
3113 else
3114 WARN( "module not found for %lx\n", pc );
3115 }
3116
3117 return func;
3118 }
3119
3120 static ULONG64 get_int_reg( CONTEXT *context, int reg )
3121 {
3122 return *(&context->Rax + reg);
3123 }
3124
3125 static void set_int_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, ULONG64 *val )
3126 {
3127 *(&context->Rax + reg) = *val;
3128 if (ctx_ptr) ctx_ptr->u2.IntegerContext[reg] = val;
3129 }
3130
3131 static void set_float_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, M128A *val )
3132 {
3133 *(&context->u.s.Xmm0 + reg) = *val;
3134 if (ctx_ptr) ctx_ptr->u.FloatingContext[reg] = val;
3135 }
3136
3137 static int get_opcode_size( struct opcode op )
3138 {
3139 switch (op.code)
3140 {
3141 case UWOP_ALLOC_LARGE:
3142 return 2 + (op.info != 0);
3143 case UWOP_SAVE_NONVOL:
3144 case UWOP_SAVE_XMM128:
3145 return 2;
3146 case UWOP_SAVE_NONVOL_FAR:
3147 case UWOP_SAVE_XMM128_FAR:
3148 return 3;
3149 default:
3150 return 1;
3151 }
3152 }
3153
3154 static BOOL is_inside_epilog( BYTE *pc, ULONG64 base, const RUNTIME_FUNCTION *function )
3155 {
3156 /* add or lea must be the first instruction, and it must have a rex.W prefix */
3157 if ((pc[0] & 0xf8) == 0x48)
3158 {
3159 switch (pc[1])
3160 {
3161 case 0x81: /* add $nnnn,%rsp */
3162 if (pc[0] == 0x48 && pc[2] == 0xc4)
3163 {
3164 pc += 7;
3165 break;
3166 }
3167 return FALSE;
3168 case 0x83: /* add $n,%rsp */
3169 if (pc[0] == 0x48 && pc[2] == 0xc4)
3170 {
3171 pc += 4;
3172 break;
3173 }
3174 return FALSE;
3175 case 0x8d: /* lea n(reg),%rsp */
3176 if (pc[0] & 0x06) return FALSE; /* rex.RX must be cleared */
3177 if (((pc[2] >> 3) & 7) != 4) return FALSE; /* dest reg mus be %rsp */
3178 if ((pc[2] & 7) == 4) return FALSE; /* no SIB byte allowed */
3179 if ((pc[2] >> 6) == 1) /* 8-bit offset */
3180 {
3181 pc += 4;
3182 break;
3183 }
3184 if ((pc[2] >> 6) == 2) /* 32-bit offset */
3185 {
3186 pc += 7;
3187 break;
3188 }
3189 return FALSE;
3190 }
3191 }
3192
3193 /* now check for various pop instructions */
3194
3195 for (;;)
3196 {
3197 if ((*pc & 0xf0) == 0x40) pc++; /* rex prefix */
3198
3199 switch (*pc)
3200 {
3201 case 0x58: /* pop %rax/%r8 */
3202 case 0x59: /* pop %rcx/%r9 */
3203 case 0x5a: /* pop %rdx/%r10 */
3204 case 0x5b: /* pop %rbx/%r11 */
3205 case 0x5c: /* pop %rsp/%r12 */
3206 case 0x5d: /* pop %rbp/%r13 */
3207 case 0x5e: /* pop %rsi/%r14 */
3208 case 0x5f: /* pop %rdi/%r15 */
3209 pc++;
3210 continue;
3211 case 0xc2: /* ret $nn */
3212 case 0xc3: /* ret */
3213 return TRUE;
3214 case 0xe9: /* jmp nnnn */
3215 pc += 5 + *(LONG *)(pc + 1);
3216 if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress)
3217 continue;
3218 break;
3219 case 0xeb: /* jmp n */
3220 pc += 2 + (signed char)pc[1];
3221 if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress)
3222 continue;
3223 break;
3224 case 0xf3: /* rep; ret (for amd64 prediction bug) */
3225 return pc[1] == 0xc3;
3226 }
3227 return FALSE;
3228 }
3229 }
3230
3231 /* execute a function epilog, which must have been validated with is_inside_epilog() */
3232 static void interpret_epilog( BYTE *pc, CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
3233 {
3234 for (;;)
3235 {
3236 BYTE rex = 0;
3237
3238 if ((*pc & 0xf0) == 0x40) rex = *pc++ & 0x0f; /* rex prefix */
3239
3240 switch (*pc)
3241 {
3242 case 0x58: /* pop %rax/r8 */
3243 case 0x59: /* pop %rcx/r9 */
3244 case 0x5a: /* pop %rdx/r10 */
3245 case 0x5b: /* pop %rbx/r11 */
3246 case 0x5c: /* pop %rsp/r12 */
3247 case 0x5d: /* pop %rbp/r13 */
3248 case 0x5e: /* pop %rsi/r14 */
3249 case 0x5f: /* pop %rdi/r15 */
3250 set_int_reg( context, ctx_ptr, *pc - 0x58 + (rex & 1) * 8, (ULONG64 *)context->Rsp );
3251 context->Rsp += sizeof(ULONG64);
3252 pc++;
3253 continue;
3254 case 0x81: /* add $nnnn,%rsp */
3255 context->Rsp += *(LONG *)(pc + 2);
3256 pc += 2 + sizeof(LONG);
3257 continue;
3258 case 0x83: /* add $n,%rsp */
3259 context->Rsp += (signed char)pc[2];
3260 pc += 3;
3261 continue;
3262 case 0x8d:
3263 if ((pc[1] >> 6) == 1) /* lea n(reg),%rsp */
3264 {
3265 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + (signed char)pc[2];
3266 pc += 3;
3267 }
3268 else /* lea nnnn(reg),%rsp */
3269 {
3270 context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + *(LONG *)(pc + 2);
3271 pc += 2 + sizeof(LONG);
3272 }
3273 continue;
3274 case 0xc2: /* ret $nn */
3275 context->Rip = *(ULONG64 *)context->Rsp;
3276 context->Rsp += sizeof(ULONG64) + *(WORD *)(pc + 1);
3277 return;
3278 case 0xc3: /* ret */
3279 case 0xf3: /* rep; ret */
3280 context->Rip = *(ULONG64 *)context->Rsp;
3281 context->Rsp += sizeof(ULONG64);
3282 return;
3283 case 0xe9: /* jmp nnnn */
3284 pc += 5 + *(LONG *)(pc + 1);
3285 continue;
3286 case 0xeb: /* jmp n */
3287 pc += 2 + (signed char)pc[1];
3288 continue;
3289 }
3290 return;
3291 }
3292 }
3293
3294 /**********************************************************************
3295 * RtlVirtualUnwind (NTDLL.@)
3296 */
3297 PVOID WINAPI RtlVirtualUnwind( ULONG type, ULONG64 base, ULONG64 pc,
3298 RUNTIME_FUNCTION *function, CONTEXT *context,
3299 PVOID *data, ULONG64 *frame_ret,
3300 KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
3301 {
3302 union handler_data *handler_data;
3303 ULONG64 frame, off;
3304 struct UNWIND_INFO *info;
3305 unsigned int i, prolog_offset;
3306
3307 TRACE( "type %x rip %lx rsp %lx\n", type, pc, context->Rsp );
3308 if (TRACE_ON(seh)) dump_unwind_info( base, function );
3309
3310 frame = *frame_ret = context->Rsp;
3311 for (;;)
3312 {
3313 info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
3314 handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
3315
3316 if (info->version != 1)
3317 {
3318 FIXME( "unknown unwind info version %u at %p\n", info->version, info );
3319 return NULL;
3320 }
3321
3322 if (info->frame_reg)
3323 frame = get_int_reg( context, info->frame_reg ) - info->frame_offset * 16;
3324
3325 /* check if in prolog */
3326 if (pc >= base + function->BeginAddress && pc < base + function->BeginAddress + info->prolog)
3327 {
3328 prolog_offset = pc - base - function->BeginAddress;
3329 }
3330 else
3331 {
3332 prolog_offset = ~0;
3333 if (is_inside_epilog( (BYTE *)pc, base, function ))
3334 {
3335 interpret_epilog( (BYTE *)pc, context, ctx_ptr );
3336 *frame_ret = frame;
3337 return NULL;
3338 }
3339 }
3340
3341 for (i = 0; i < info->count; i += get_opcode_size(info->opcodes[i]))
3342 {
3343 if (prolog_offset < info->opcodes[i].offset) continue; /* skip it */
3344
3345 switch (info->opcodes[i].code)
3346 {
3347 case UWOP_PUSH_NONVOL: /* pushq %reg */
3348 set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)context->Rsp );
3349 context->Rsp += sizeof(ULONG64);
3350 break;
3351 case UWOP_ALLOC_LARGE: /* subq $nn,%rsp */
3352 if (info->opcodes[i].info) context->Rsp += *(DWORD *)&info->opcodes[i+1];
3353 else context->Rsp += *(USHORT *)&info->opcodes[i+1] * 8;
3354 break;
3355 case UWOP_ALLOC_SMALL: /* subq $n,%rsp */
3356 context->Rsp += (info->opcodes[i].info + 1) * 8;
3357 break;
3358 case UWOP_SET_FPREG: /* leaq nn(%rsp),%framereg */
3359 context->Rsp = *frame_ret = frame;
3360 break;
3361 case UWOP_SAVE_NONVOL: /* movq %reg,n(%rsp) */
3362 off = frame + *(USHORT *)&info->opcodes[i+1] * 8;
3363 set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)off );
3364 break;
3365 case UWOP_SAVE_NONVOL_FAR: /* movq %reg,nn(%rsp) */
3366 off = frame + *(DWORD *)&info->opcodes[i+1];
3367 set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)off );
3368 break;
3369 case UWOP_SAVE_XMM128: /* movaps %xmmreg,n(%rsp) */
3370 off = frame + *(USHORT *)&info->opcodes[i+1] * 16;
3371 set_float_reg( context, ctx_ptr, info->opcodes[i].info, (M128A *)off );
3372 break;
3373 case UWOP_SAVE_XMM128_FAR: /* movaps %xmmreg,nn(%rsp) */
3374 off = frame + *(DWORD *)&info->opcodes[i+1];
3375 set_float_reg( context, ctx_ptr, info->opcodes[i].info, (M128A *)off );
3376 break;
3377 case UWOP_PUSH_MACHFRAME:
3378 FIXME( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
3379 break;
3380 default:
3381 FIXME( "unknown code %u\n", info->opcodes[i].code );
3382 break;
3383 }
3384 }
3385
3386 if (!(info->flags & UNW_FLAG_CHAININFO)) break;
3387 function = &handler_data->chain; /* restart with the chained info */
3388 }
3389
3390 /* now pop return address */
3391 context->Rip = *(ULONG64 *)context->Rsp;
3392 context->Rsp += sizeof(ULONG64);
3393
3394 if (!(info->flags & type)) return NULL; /* no matching handler */
3395 if (prolog_offset != ~0) return NULL; /* inside prolog */
3396
3397 *data = &handler_data->handler + 1;
3398 return (char *)base + handler_data->handler;
3399 }
3400
3401 struct unwind_exception_frame
3402 {
3403 EXCEPTION_REGISTRATION_RECORD frame;
3404 DISPATCHER_CONTEXT *dispatch;
3405 };
3406
3407 /**********************************************************************
3408 * unwind_exception_handler
3409 *
3410 * Handler for exceptions happening while calling an unwind handler.
3411 */
3412 static DWORD unwind_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
3413 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
3414 {
3415 struct unwind_exception_frame *unwind_frame = (struct unwind_exception_frame *)frame;
3416 DISPATCHER_CONTEXT *dispatch = (DISPATCHER_CONTEXT *)dispatcher;
3417
3418 /* copy the original dispatcher into the current one, except for the TargetIp */
3419 dispatch->ControlPc = unwind_frame->dispatch->ControlPc;
3420 dispatch->ImageBase = unwind_frame->dispatch->ImageBase;
3421 dispatch->FunctionEntry = unwind_frame->dispatch->FunctionEntry;
3422 dispatch->EstablisherFrame = unwind_frame->dispatch->EstablisherFrame;
3423 dispatch->ContextRecord = unwind_frame->dispatch->ContextRecord;
3424 dispatch->LanguageHandler = unwind_frame->dispatch->LanguageHandler;
3425 dispatch->HandlerData = unwind_frame->dispatch->HandlerData;
3426 dispatch->HistoryTable = unwind_frame->dispatch->HistoryTable;
3427 dispatch->ScopeIndex = unwind_frame->dispatch->ScopeIndex;
3428 TRACE( "detected collided unwind\n" );
3429 return ExceptionCollidedUnwind;
3430 }
3431
3432 /**********************************************************************
3433 * call_unwind_handler
3434 *
3435 * Call a single unwind handler.
3436 */
3437 static DWORD call_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch )
3438 {
3439 struct unwind_exception_frame frame;
3440 DWORD res;
3441
3442 frame.frame.Handler = unwind_exception_handler;
3443 frame.dispatch = dispatch;
3444 __wine_push_frame( &frame.frame );
3445
3446 TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
3447 dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
3448 res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
3449 TRACE( "handler %p returned %x\n", dispatch->LanguageHandler, res );
3450
3451 __wine_pop_frame( &frame.frame );
3452
3453 switch (res)
3454 {
3455 case ExceptionContinueSearch:
3456 case ExceptionCollidedUnwind:
3457 break;
3458 default:
3459 raise_status( STATUS_INVALID_DISPOSITION, rec );
3460 break;
3461 }
3462
3463 return res;
3464 }
3465
3466
3467 /**********************************************************************
3468 * call_teb_unwind_handler
3469 *
3470 * Call a single unwind handler from the TEB chain.
3471 */
3472 static DWORD call_teb_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
3473 EXCEPTION_REGISTRATION_RECORD *teb_frame )
3474 {
3475 DWORD res;
3476
3477 TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
3478 teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
3479 res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
3480 TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
3481
3482 switch (res)
3483 {
3484 case ExceptionContinueSearch:
3485 case ExceptionCollidedUnwind:
3486 break;
3487 default:
3488 raise_status( STATUS_INVALID_DISPOSITION, rec );
3489 break;
3490 }
3491
3492 return res;
3493 }
3494
3495
3496 /**********************************************************************
3497 * call_consolidate_callback
3498 *
3499 * Wrapper function to call a consolidate callback from a fake frame.
3500 * If the callback executes RtlUnwindEx (like for example done in C++ handlers),
3501 * we have to skip all frames which were already processed. To do that we
3502 * trick the unwinding functions into thinking the call came from somewhere
3503 * else. All CFI instructions are either DW_CFA_def_cfa_expression or
3504 * DW_CFA_expression, and the expressions have the following format:
3505 *
3506 * DW_OP_breg6; sleb128 0x10 | Load %rbp + 0x10
3507 * DW_OP_deref | Get *(%rbp + 0x10) == context
3508 * DW_OP_plus_uconst; uleb128 <OFFSET> | Add offset to get struct member
3509 * [DW_OP_deref] | Dereference, only for CFA
3510 */
3511 extern void * WINAPI call_consolidate_callback( CONTEXT *context,
3512 void *(CALLBACK *callback)(EXCEPTION_RECORD *),
3513 EXCEPTION_RECORD *rec );
3514 __ASM_GLOBAL_FUNC( call_consolidate_callback,
3515 "pushq %rbp\n\t"
3516 __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
3517 __ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
3518 "movq %rsp,%rbp\n\t"
3519 __ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
3520 "subq $0x20,%rsp\n\t"
3521 "movq %rcx,0x10(%rbp)\n\t"
3522 __ASM_CFI(".cfi_remember_state\n\t")
3523 __ASM_CFI(".cfi_escape 0x0f,0x07,0x76,0x10,0x06,0x23,0x98,0x01,0x06\n\t") /* CFA */
3524 __ASM_CFI(".cfi_escape 0x10,0x03,0x06,0x76,0x10,0x06,0x23,0x90,0x01\n\t") /* %rbx */
3525 __ASM_CFI(".cfi_escape 0x10,0x04,0x06,0x76,0x10,0x06,0x23,0xa8,0x01\n\t") /* %rsi */
3526 __ASM_CFI(".cfi_escape 0x10,0x05,0x06,0x76,0x10,0x06,0x23,0xb0,0x01\n\t") /* %rdi */
3527 __ASM_CFI(".cfi_escape 0x10,0x06,0x06,0x76,0x10,0x06,0x23,0xa0,0x01\n\t") /* %rbp */
3528 __ASM_CFI(".cfi_escape 0x10,0x0c,0x06,0x76,0x10,0x06,0x23,0xd8,0x01\n\t") /* %r12 */
3529 __ASM_CFI(".cfi_escape 0x10,0x0d,0x06,0x76,0x10,0x06,0x23,0xe0,0x01\n\t") /* %r13 */
3530 __ASM_CFI(".cfi_escape 0x10,0x0e,0x06,0x76,0x10,0x06,0x23,0xe8,0x01\n\t") /* %r14 */
3531 __ASM_CFI(".cfi_escape 0x10,0x0f,0x06,0x76,0x10,0x06,0x23,0xf0,0x01\n\t") /* %r15 */
3532 __ASM_CFI(".cfi_escape 0x10,0x10,0x06,0x76,0x10,0x06,0x23,0xf8,0x01\n\t") /* %rip */
3533 __ASM_CFI(".cfi_escape 0x10,0x17,0x06,0x76,0x10,0x06,0x23,0x80,0x04\n\t") /* %xmm6 */
3534 __ASM_CFI(".cfi_escape 0x10,0x18,0x06,0x76,0x10,0x06,0x23,0x90,0x04\n\t") /* %xmm7 */
3535 __ASM_CFI(".cfi_escape 0x10,0x19,0x06,0x76,0x10,0x06,0x23,0xa0,0x04\n\t") /* %xmm8 */
3536 __ASM_CFI(".cfi_escape 0x10,0x1a,0x06,0x76,0x10,0x06,0x23,0xb0,0x04\n\t") /* %xmm9 */
3537 __ASM_CFI(".cfi_escape 0x10,0x1b,0x06,0x76,0x10,0x06,0x23,0xc0,0x04\n\t") /* %xmm10 */
3538 __ASM_CFI(".cfi_escape 0x10,0x1c,0x06,0x76,0x10,0x06,0x23,0xd0,0x04\n\t") /* %xmm11 */
3539 __ASM_CFI(".cfi_escape 0x10,0x1d,0x06,0x76,0x10,0x06,0x23,0xe0,0x04\n\t") /* %xmm12 */
3540 __ASM_CFI(".cfi_escape 0x10,0x1e,0x06,0x76,0x10,0x06,0x23,0xf0,0x04\n\t") /* %xmm13 */
3541 __ASM_CFI(".cfi_escape 0x10,0x1f,0x06,0x76,0x10,0x06,0x23,0x80,0x05\n\t") /* %xmm14 */
3542 __ASM_CFI(".cfi_escape 0x10,0x20,0x06,0x76,0x10,0x06,0x23,0x90,0x05\n\t") /* %xmm15 */
3543 "movq %r8,%rcx\n\t"
3544 "callq *%rdx\n\t"
3545 __ASM_CFI(".cfi_restore_state\n\t")
3546 "movq %rbp,%rsp\n\t"
3547 __ASM_CFI(".cfi_def_cfa_register %rsp\n\t")
3548 "popq %rbp\n\t"
3549 __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
3550 __ASM_CFI(".cfi_same_value %rbp\n\t")
3551 "ret")
3552
3553 /*******************************************************************
3554 * RtlRestoreContext (NTDLL.@)
3555 */
3556 void WINAPI RtlRestoreContext( CONTEXT *context, EXCEPTION_RECORD *rec )
3557 {
3558 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
3559
3560 if (rec && rec->ExceptionCode == STATUS_LONGJUMP && rec->NumberParameters >= 1)
3561 {
3562 struct MSVCRT_JUMP_BUFFER *jmp = (struct MSVCRT_JUMP_BUFFER *)rec->ExceptionInformation[0];
3563 context->Rbx = jmp->Rbx;
3564 context->Rsp = jmp->Rsp;
3565 context->Rbp = jmp->Rbp;
3566 context->Rsi = jmp->Rsi;
3567 context->Rdi = jmp->Rdi;
3568 context->R12 = jmp->R12;
3569 context->R13 = jmp->R13;
3570 context->R14 = jmp->R14;
3571 context->R15 = jmp->R15;
3572 context->Rip = jmp->Rip;
3573 context->u.s.Xmm6 = jmp->Xmm6;
3574 context->u.s.Xmm7 = jmp->Xmm7;
3575 context->u.s.Xmm8 = jmp->Xmm8;
3576 context->u.s.Xmm9 = jmp->Xmm9;
3577 context->u.s.Xmm10 = jmp->Xmm10;
3578 context->u.s.Xmm11 = jmp->Xmm11;
3579 context->u.s.Xmm12 = jmp->Xmm12;
3580 context->u.s.Xmm13 = jmp->Xmm13;
3581 context->u.s.Xmm14 = jmp->Xmm14;
3582 context->u.s.Xmm15 = jmp->Xmm15;
3583 }
3584 else if (rec && rec->ExceptionCode == STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters >= 1)
3585 {
3586 PVOID (CALLBACK *consolidate)(EXCEPTION_RECORD *) = (void *)rec->ExceptionInformation[0];
3587 TRACE( "calling consolidate callback %p (rec=%p)\n", consolidate, rec );
3588 context->Rip = (ULONG64)call_consolidate_callback( context, consolidate, rec );
3589 }
3590
3591 /* hack: remove no longer accessible TEB frames */
3592 while ((ULONG64)teb_frame < context->Rsp)
3593 {
3594 TRACE( "removing TEB frame: %p\n", teb_frame );
3595 teb_frame = __wine_pop_frame( teb_frame );
3596 }
3597
3598 TRACE( "returning to %lx stack %lx\n", context->Rip, context->Rsp );
3599 set_cpu_context( context );
3600 }
3601
3602
3603 /*******************************************************************
3604 * RtlUnwindEx (NTDLL.@)
3605 */
3606 void WINAPI RtlUnwindEx( PVOID end_frame, PVOID target_ip, EXCEPTION_RECORD *rec,
3607 PVOID retval, CONTEXT *context, UNWIND_HISTORY_TABLE *table )
3608 {
3609 EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
3610 EXCEPTION_RECORD record;
3611 DISPATCHER_CONTEXT dispatch;
3612 CONTEXT new_context;
3613 LDR_MODULE *module;
3614 NTSTATUS status;
3615 DWORD i;
3616
3617 RtlCaptureContext( context );
3618 new_context = *context;
3619
3620 /* build an exception record, if we do not have one */
3621 if (!rec)
3622 {
3623 record.ExceptionCode = STATUS_UNWIND;
3624 record.ExceptionFlags = 0;
3625 record.ExceptionRecord = NULL;
3626 record.ExceptionAddress = (void *)context->Rip;
3627 record.NumberParameters = 0;
3628 rec = &record;
3629 }
3630
3631 rec->ExceptionFlags |= EH_UNWINDING | (end_frame ? 0 : EH_EXIT_UNWIND);
3632
3633 TRACE( "code=%x flags=%x end_frame=%p target_ip=%p rip=%016lx\n",
3634 rec->ExceptionCode, rec->ExceptionFlags, end_frame, target_ip, context->Rip );
3635 for (i = 0; i < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); i++)
3636 TRACE( " info[%d]=%016lx\n", i, rec->ExceptionInformation[i] );
3637 TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
3638 context->Rax, context->Rbx, context->Rcx, context->Rdx );
3639 TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
3640 context->Rsi, context->Rdi, context->Rbp, context->Rsp );
3641 TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
3642 context->R8, context->R9, context->R10, context->R11 );
3643 TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
3644 context->R12, context->R13, context->R14, context->R15 );
3645
3646 dispatch.EstablisherFrame = context->Rsp;
3647 dispatch.TargetIp = (ULONG64)target_ip;
3648 dispatch.ContextRecord = context;
3649 dispatch.HistoryTable = table;
3650
3651 for (;;)
3652 {
3653 /* FIXME: should use the history table to make things faster */
3654
3655 dispatch.ImageBase = 0;
3656 dispatch.ScopeIndex = 0;
3657 dispatch.ControlPc = context->Rip;
3658
3659 /* first look for PE exception information */
3660
3661 if ((dispatch.FunctionEntry = lookup_function_info( context->Rip, &dispatch.ImageBase, &module )))
3662 {
3663 dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_UHANDLER, dispatch.ImageBase,
3664 context->Rip, dispatch.FunctionEntry,
3665 &new_context, &dispatch.HandlerData,
3666 &dispatch.EstablisherFrame, NULL );
3667 goto unwind_done;
3668 }
3669
3670 /* then look for host system exception information */
3671
3672 if (!module || (module->Flags & LDR_WINE_INTERNAL))
3673 {
3674 BOOL got_info = FALSE;
3675 struct dwarf_eh_bases bases;
3676 const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context->Rip - 1), &bases );
3677
3678 if (fde)
3679 {
3680 status = dwarf_virtual_unwind( context->Rip, &dispatch.EstablisherFrame, &new_context, fde,
3681 &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
3682 if (status != STATUS_SUCCESS) raise_status( status, rec );
3683 got_info = TRUE;
3684 }
3685 #ifdef HAVE_LIBUNWIND_H
3686 else
3687 {
3688 status = libunwind_virtual_unwind( context->Rip, &got_info, &dispatch.EstablisherFrame, &new_context,
3689 &dispatch.LanguageHandler, &dispatch.HandlerData );
3690 if (status != STATUS_SUCCESS) raise_status( status, rec );
3691 }
3692 #endif
3693
3694 if (got_info)
3695 {
3696 dispatch.FunctionEntry = NULL;
3697 if (dispatch.LanguageHandler && !module)
3698 {
3699 FIXME( "calling personality routine in system library not supported yet\n" );
3700 dispatch.LanguageHandler = NULL;
3701 }
3702 goto unwind_done;
3703 }
3704 }
3705 else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
3706
3707 /* no exception information, treat as a leaf function */
3708
3709 new_context.Rip = *(ULONG64 *)context->Rsp;
3710 new_context.Rsp = context->Rsp + sizeof(ULONG64);
3711 dispatch.EstablisherFrame = new_context.Rsp;
3712 dispatch.LanguageHandler = NULL;
3713
3714 unwind_done:
3715 if (!dispatch.EstablisherFrame) break;
3716
3717 if (is_inside_signal_stack( (void *)dispatch.EstablisherFrame ))
3718 {
3719 TRACE( "frame %lx is inside signal stack (%p-%p)\n", dispatch.EstablisherFrame,
3720 get_signal_stack(), (char *)get_signal_stack() + signal_stack_size );
3721 *context = new_context;
3722 continue;
3723 }
3724
3725 if ((dispatch.EstablisherFrame & 7) ||
3726 dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
3727 dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
3728 {
3729 ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
3730 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
3731 rec->ExceptionFlags |= EH_STACK_INVALID;
3732 break;
3733 }
3734
3735 if (dispatch.LanguageHandler)
3736 {
3737 if (end_frame && (dispatch.EstablisherFrame > (ULONG64)end_frame))
3738 {
3739 ERR( "invalid end frame %lx/%p\n", dispatch.EstablisherFrame, end_frame );
3740 raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
3741 }
3742 if (dispatch.EstablisherFrame == (ULONG64)end_frame) rec->ExceptionFlags |= EH_TARGET_UNWIND;
3743 if (call_unwind_handler( rec, &dispatch ) == ExceptionCollidedUnwind)
3744 {
3745 ULONG64 frame;
3746
3747 *context = new_context = *dispatch.ContextRecord;
3748 dispatch.ContextRecord = context;
3749 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
3750 dispatch.ControlPc, dispatch.FunctionEntry,
3751 &new_context, NULL, &frame, NULL );
3752 rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
3753 goto unwind_done;
3754 }
3755 rec->ExceptionFlags &= ~EH_COLLIDED_UNWIND;
3756 }
3757 else /* hack: call builtin handlers registered in the tib list */
3758 {
3759 DWORD64 backup_frame = dispatch.EstablisherFrame;
3760 while ((ULONG64)teb_frame < new_context.Rsp && (ULONG64)teb_frame < (ULONG64)end_frame)
3761 {
3762 TRACE( "found builtin frame %p handler %p\n", teb_frame, teb_frame->Handler );
3763 dispatch.EstablisherFrame = (ULONG64)teb_frame;
3764 if (call_teb_unwind_handler( rec, &dispatch, teb_frame ) == ExceptionCollidedUnwind)
3765 {
3766 ULONG64 frame;
3767
3768 teb_frame = __wine_pop_frame( teb_frame );
3769
3770 *context = new_context = *dispatch.ContextRecord;
3771 dispatch.ContextRecord = context;
3772 RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
3773 dispatch.ControlPc, dispatch.FunctionEntry,
3774 &new_context, NULL, &frame, NULL );
3775 rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
3776 goto unwind_done;
3777 }
3778 teb_frame = __wine_pop_frame( teb_frame );
3779 }
3780 if ((ULONG64)teb_frame == (ULONG64)end_frame && (ULONG64)end_frame < new_context.Rsp) break;
3781 dispatch.EstablisherFrame = backup_frame;
3782 }
3783
3784 if (dispatch.EstablisherFrame == (ULONG64)end_frame) break;
3785 *context = new_context;
3786 }
3787
3788 context->Rax = (ULONG64)retval;
3789 context->Rip = (ULONG64)target_ip;
3790 RtlRestoreContext(context, rec);
3791 }
3792
3793
3794 /*******************************************************************
3795 * RtlUnwind (NTDLL.@)
3796 */
3797 void WINAPI RtlUnwind( void *frame, void *target_ip, EXCEPTION_RECORD *rec, void *retval )
3798 {
3799 CONTEXT context;
3800 RtlUnwindEx( frame, target_ip, rec, retval, &context, NULL );
3801 }
3802
3803
3804 /*******************************************************************
3805 * _local_unwind (NTDLL.@)
3806 */
3807 void WINAPI _local_unwind( void *frame, void *target_ip )
3808 {
3809 CONTEXT context;
3810 RtlUnwindEx( frame, target_ip, NULL, NULL, &context, NULL );
3811 }
3812
3813 /*******************************************************************
3814 * __C_specific_handler (NTDLL.@)
3815 */
3816 EXCEPTION_DISPOSITION WINAPI __C_specific_handler( EXCEPTION_RECORD *rec,
3817 ULONG64 frame,
3818 CONTEXT *context,
3819 struct _DISPATCHER_CONTEXT *dispatch )
3820 {
3821 SCOPE_TABLE *table = dispatch->HandlerData;
3822 ULONG i;
3823
3824 TRACE( "%p %lx %p %p\n", rec, frame, context, dispatch );
3825 if (TRACE_ON(seh)) dump_scope_table( dispatch->ImageBase, table );
3826
3827 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
3828 {
3829 for (i = dispatch->ScopeIndex; i < table->Count; i++)
3830 {
3831 if (dispatch->ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
3832 dispatch->ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
3833 {
3834 TERMINATION_HANDLER handler;
3835
3836 if (table->ScopeRecord[i].JumpTarget) continue;
3837
3838 if (rec->ExceptionFlags & EH_TARGET_UNWIND &&
3839 dispatch->TargetIp >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
3840 dispatch->TargetIp < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
3841 {
3842 break;
3843 }
3844
3845 handler = (TERMINATION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
3846 dispatch->ScopeIndex = i+1;
3847
3848 TRACE( "calling __finally %p frame %lx\n", handler, frame );
3849 handler( 1, frame );
3850 }
3851 }
3852 return ExceptionContinueSearch;
3853 }
3854
3855 for (i = dispatch->ScopeIndex; i < table->Count; i++)
3856 {
3857 if (dispatch->ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
3858 dispatch->ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
3859 {
3860 if (!table->ScopeRecord[i].JumpTarget) continue;
3861 if (table->ScopeRecord[i].HandlerAddress != EXCEPTION_EXECUTE_HANDLER)
3862 {
3863 EXCEPTION_POINTERS ptrs;
3864 PC_LANGUAGE_EXCEPTION_HANDLER filter;
3865
3866 filter = (PC_LANGUAGE_EXCEPTION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
3867 ptrs.ExceptionRecord = rec;
3868 ptrs.ContextRecord = context;
3869 TRACE( "calling filter %p ptrs %p frame %lx\n", filter, &ptrs, frame );
3870 switch (filter( &ptrs, frame ))
3871 {
3872 case EXCEPTION_EXECUTE_HANDLER:
3873 break;
3874 case EXCEPTION_CONTINUE_SEARCH:
3875 continue;
3876 case EXCEPTION_CONTINUE_EXECUTION:
3877 return ExceptionContinueExecution;
3878 }
3879 }
3880 TRACE( "unwinding to target %lx\n", dispatch->ImageBase + table->ScopeRecord[i].JumpTarget );
3881 RtlUnwindEx( (void *)frame, (char *)dispatch->ImageBase + table->ScopeRecord[i].JumpTarget,
3882 rec, 0, dispatch->ContextRecord, dispatch->HistoryTable );
3883 }
3884 }
3885 return ExceptionContinueSearch;
3886 }
3887
3888
3889 /*******************************************************************
3890 * NtRaiseException (NTDLL.@)
3891 */
3892 NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
3893 {
3894 NTSTATUS status = raise_exception( rec, context, first_chance );
3895 if (status == STATUS_SUCCESS) NtSetContextThread( GetCurrentThread(), context );
3896 return status;
3897 }
3898
3899
3900 /***********************************************************************
3901 * RtlRaiseException (NTDLL.@)
3902 */
3903 void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
3904 {
3905 NTSTATUS status;
3906
3907 rec->ExceptionAddress = (void *)context->Rip;
3908 status = raise_exception( rec, context, TRUE );
3909 if (status != STATUS_SUCCESS) raise_status( status, rec );
3910 }
3911 __ASM_GLOBAL_FUNC( RtlRaiseException,
3912 "movq %rcx,8(%rsp)\n\t"
3913 "sub $0x4f8,%rsp\n\t"
3914 __ASM_CFI(".cfi_adjust_cfa_offset 0x4f8\n\t")
3915 "leaq 0x20(%rsp),%rcx\n\t"
3916 "call " __ASM_NAME("RtlCaptureContext") "\n\t"
3917 "leaq 0x20(%rsp),%rdx\n\t" /* context pointer */
3918 "movq 0x4f8(%rsp),%rax\n\t" /* return address */
3919 "movq %rax,0xf8(%rdx)\n\t" /* context->Rip */
3920 "leaq 0x500(%rsp),%rax\n\t" /* orig stack pointer */
3921 "movq %rax,0x98(%rdx)\n\t" /* context->Rsp */
3922 "movq (%rax),%rcx\n\t" /* original first parameter */
3923 "movq %rcx,0x80(%rdx)\n\t" /* context->Rcx */
3924 "call " __ASM_NAME("__regs_RtlRaiseException") "\n\t"
3925 "leaq 0x20(%rsp),%rdi\n\t" /* context pointer */
3926 "call " __ASM_NAME("set_cpu_context") /* does not return */ );
3927
3928
3929 /*************************************************************************
3930 * RtlCaptureStackBackTrace (NTDLL.@)
3931 */
3932 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
3933 {
3934 FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash );
3935 return 0;
3936 }
3937
3938
3939 /***********************************************************************
3940 * call_thread_func
3941 */
3942 void call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg, void *frame )
3943 {
3944 ntdll_get_thread_data()->exit_frame = frame;
3945 __TRY
3946 {
3947 RtlExitUserThread( entry( arg ));
3948 }
3949 __EXCEPT(unhandled_exception_filter)
3950 {
3951 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
3952 }
3953 __ENDTRY
3954 abort(); /* should not be reached */
3955 }
3956
3957 extern void DECLSPEC_NORETURN call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg );
3958 __ASM_GLOBAL_FUNC( call_thread_entry_point,
3959 "subq $56,%rsp\n\t"
3960 __ASM_CFI(".cfi_adjust_cfa_offset 56\n\t")
3961 "movq %rbp,48(%rsp)\n\t"
3962 __ASM_CFI(".cfi_rel_offset %rbp,48\n\t")
3963 "movq %rbx,40(%rsp)\n\t"
3964 __ASM_CFI(".cfi_rel_offset %rbx,40\n\t")
3965 "movq %r12,32(%rsp)\n\t"
3966 __ASM_CFI(".cfi_rel_offset %r12,32\n\t")
3967 "movq %r13,24(%rsp)\n\t"
3968 __ASM_CFI(".cfi_rel_offset %r13,24\n\t")
3969 "movq %r14,16(%rsp)\n\t"
3970 __ASM_CFI(".cfi_rel_offset %r14,16\n\t")
3971 "movq %r15,8(%rsp)\n\t"
3972 __ASM_CFI(".cfi_rel_offset %r15,8\n\t")
3973 "movq %rsp,%rdx\n\t"
3974 "call " __ASM_NAME("call_thread_func") );
3975
3976 extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), void *frame );
3977 __ASM_GLOBAL_FUNC( call_thread_exit_func,
3978 "movq %rdx,%rsp\n\t"
3979 __ASM_CFI(".cfi_adjust_cfa_offset 56\n\t")
3980 __ASM_CFI(".cfi_rel_offset %rbp,48\n\t")
3981 __ASM_CFI(".cfi_rel_offset %rbx,40\n\t")
3982 __ASM_CFI(".cfi_rel_offset %r12,32\n\t")
3983 __ASM_CFI(".cfi_rel_offset %r13,24\n\t")
3984 __ASM_CFI(".cfi_rel_offset %r14,16\n\t")
3985 __ASM_CFI(".cfi_rel_offset %r15,8\n\t")
3986 "call *%rsi" );
3987
3988 /***********************************************************************
3989 * RtlExitUserThread (NTDLL.@)
3990 */
3991 void WINAPI RtlExitUserThread( ULONG status )
3992 {
3993 if (!ntdll_get_thread_data()->exit_frame) exit_thread( status );
3994 call_thread_exit_func( status, exit_thread, ntdll_get_thread_data()->exit_frame );
3995 }
3996
3997 /***********************************************************************
3998 * abort_thread
3999 */
4000 void abort_thread( int status )
4001 {
4002 if (!ntdll_get_thread_data()->exit_frame) terminate_thread( status );
4003 call_thread_exit_func( status, terminate_thread, ntdll_get_thread_data()->exit_frame );
4004 }
4005
4006 /**********************************************************************
4007 * __wine_enter_vm86 (NTDLL.@)
4008 */
4009 void __wine_enter_vm86( CONTEXT *context )
4010 {
4011 MESSAGE("vm86 mode not supported on this platform\n");
4012 }
4013
4014 /**********************************************************************
4015 * DbgBreakPoint (NTDLL.@)
4016 */
4017 __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret")
4018
4019 /**********************************************************************
4020 * DbgUserBreakPoint (NTDLL.@)
4021 */
4022 __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret")
4023
4024 #endif /* __x86_64__ */
Windows API implementation