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user32: Implement SystemParametersInfo(SPI_[GS]ETCOMBOBOXANIMATION).
[wine/testsucceed.git] / dlls / ntdll / signal_i386.c
bloba9f2589c5517eece8a4630d1777e4e6cacea3696
1 /*
2 * i386 signal handling routines
3 *
4 * Copyright 1999 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #ifdef __i386__
22
23 #include "config.h"
24 #include "wine/port.h"
25
26 #include <errno.h>
27 #include <signal.h>
28 #include <stdlib.h>
29 #include <stdarg.h>
30 #include <stdio.h>
31 #ifdef HAVE_UNISTD_H
32 # include <unistd.h>
33 #endif
34
35 #ifdef HAVE_SYS_PARAM_H
36 # include <sys/param.h>
37 #endif
38 #ifdef HAVE_SYSCALL_H
39 # include <syscall.h>
40 #else
41 # ifdef HAVE_SYS_SYSCALL_H
42 # include <sys/syscall.h>
43 # endif
44 #endif
45
46 #ifdef HAVE_SYS_VM86_H
47 # include <sys/vm86.h>
48 #endif
49
50 #ifdef HAVE_SYS_SIGNAL_H
51 # include <sys/signal.h>
52 #endif
53
54 #include "windef.h"
55 #include "thread.h"
56 #include "wine/library.h"
57 #include "ntdll_misc.h"
58
59 #ifdef HAVE_VALGRIND_MEMCHECK_H
60 #include <valgrind/memcheck.h>
61 #endif
62
63 /***********************************************************************
64 * signal context platform-specific definitions
65 */
66
67 #ifdef linux
68 typedef struct
69 {
70 unsigned short sc_gs, __gsh;
71 unsigned short sc_fs, __fsh;
72 unsigned short sc_es, __esh;
73 unsigned short sc_ds, __dsh;
74 unsigned long sc_edi;
75 unsigned long sc_esi;
76 unsigned long sc_ebp;
77 unsigned long sc_esp;
78 unsigned long sc_ebx;
79 unsigned long sc_edx;
80 unsigned long sc_ecx;
81 unsigned long sc_eax;
82 unsigned long sc_trapno;
83 unsigned long sc_err;
84 unsigned long sc_eip;
85 unsigned short sc_cs, __csh;
86 unsigned long sc_eflags;
87 unsigned long esp_at_signal;
88 unsigned short sc_ss, __ssh;
89 unsigned long i387;
90 unsigned long oldmask;
91 unsigned long cr2;
92 } volatile SIGCONTEXT;
93
94 #define HANDLER_DEF(name) void name( int __signal, SIGCONTEXT __context )
95 #define HANDLER_CONTEXT (&__context)
96
97 /* this is the sigaction structure from the Linux 2.1.20 kernel. */
98 struct kernel_sigaction
99 {
100 void (*ksa_handler)();
101 unsigned long ksa_mask;
102 unsigned long ksa_flags;
103 void *ksa_restorer;
104 };
105
106 #ifndef SYS_sigaction
107 # ifndef __NR_sigaction
108 # error The sigaction syscall is part of the Linux i386 ABI, but your headers does not define it. Please raise a bug with your distribution.
109 # endif
110 # define SYS_sigaction __NR_sigaction
111 #endif
112
113 /* Similar to the sigaction function in libc, except it leaves alone the
114 restorer field, which is used to specify the signal stack address */
115 static inline int wine_sigaction( int sig, struct kernel_sigaction *new,
116 struct kernel_sigaction *old )
117 {
118 __asm__ __volatile__( "pushl %%ebx\n\t"
119 "movl %2,%%ebx\n\t"
120 "int $0x80\n\t"
121 "popl %%ebx"
122 : "=a" (sig)
123 : "0" (SYS_sigaction), "S" (sig), "c" (new), "d" (old) );
124 if (sig>=0) return 0;
125 errno = -sig;
126 return -1;
127 }
128
129 #ifdef HAVE_SIGALTSTACK
130 /* direct syscall for sigaltstack to work around glibc 2.0 brain-damage */
131 static inline int wine_sigaltstack( const struct sigaltstack *new,
132 struct sigaltstack *old )
133 {
134 int ret;
135 __asm__ __volatile__( "pushl %%ebx\n\t"
136 "movl %2,%%ebx\n\t"
137 "int $0x80\n\t"
138 "popl %%ebx"
139 : "=a" (ret)
140 : "0" (SYS_sigaltstack), "q" (new), "c" (old) );
141 if (ret >= 0) return 0;
142 errno = -ret;
143 return -1;
144 }
145 #endif
146
147 #define VM86_EAX 0 /* the %eax value while vm86_enter is executing */
148
149 int vm86_enter( void **vm86_ptr );
150 void vm86_return(void);
151 void vm86_return_end(void);
152 __ASM_GLOBAL_FUNC(vm86_enter,
153 "pushl %ebp\n\t"
154 "movl %esp, %ebp\n\t"
155 "movl $166,%eax\n\t" /*SYS_vm86*/
156 "movl 8(%ebp),%ecx\n\t" /* vm86_ptr */
157 "movl (%ecx),%ecx\n\t"
158 "pushl %ebx\n\t"
159 "movl $1,%ebx\n\t" /*VM86_ENTER*/
160 "pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */
161 "pushl %fs\n\t"
162 "pushl %gs\n\t"
163 "int $0x80\n"
164 ".globl " __ASM_NAME("vm86_return") "\n\t"
165 __ASM_FUNC("vm86_return") "\n"
166 __ASM_NAME("vm86_return") ":\n\t"
167 "popl %gs\n\t"
168 "popl %fs\n\t"
169 "popl %ecx\n\t"
170 "popl %ebx\n\t"
171 "popl %ebp\n\t"
172 "testl %eax,%eax\n\t"
173 "jl 0f\n\t"
174 "cmpb $0,%al\n\t" /* VM86_SIGNAL */
175 "je " __ASM_NAME("vm86_enter") "\n\t"
176 "0:\n\t"
177 "movl 4(%esp),%ecx\n\t" /* vm86_ptr */
178 "movl $0,(%ecx)\n\t"
179 ".globl " __ASM_NAME("vm86_return_end") "\n\t"
180 __ASM_FUNC("vm86_return_end") "\n"
181 __ASM_NAME("vm86_return_end") ":\n\t"
182 "ret" );
183
184 #ifdef HAVE_SYS_VM86_H
185 # define __HAVE_VM86
186 #endif
187
188 #endif /* linux */
189
190 #ifdef BSDI
191
192 #define EAX_sig(context) ((context)->tf_eax)
193 #define EBX_sig(context) ((context)->tf_ebx)
194 #define ECX_sig(context) ((context)->tf_ecx)
195 #define EDX_sig(context) ((context)->tf_edx)
196 #define ESI_sig(context) ((context)->tf_esi)
197 #define EDI_sig(context) ((context)->tf_edi)
198 #define EBP_sig(context) ((context)->tf_ebp)
199
200 #define CS_sig(context) ((context)->tf_cs)
201 #define DS_sig(context) ((context)->tf_ds)
202 #define ES_sig(context) ((context)->tf_es)
203 #define SS_sig(context) ((context)->tf_ss)
204
205 #include <machine/frame.h>
206 typedef struct trapframe SIGCONTEXT;
207
208 #define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
209 #define HANDLER_CONTEXT __context
210
211 #define EFL_sig(context) ((context)->tf_eflags)
212
213 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
214 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
215
216 #endif /* bsdi */
217
218 #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__)
219
220 typedef struct sigcontext SIGCONTEXT;
221
222 #define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
223 #define HANDLER_CONTEXT __context
224
225 #endif /* *BSD */
226
227 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
228
229 #ifdef _SCO_DS
230 #include <sys/regset.h>
231 #endif
232 /* Solaris kludge */
233 #undef ERR
234 #include <sys/ucontext.h>
235 #undef ERR
236 typedef struct ucontext SIGCONTEXT;
237
238 #define HANDLER_DEF(name) void name( int __signal, siginfo_t *__siginfo, SIGCONTEXT *__context )
239 #define HANDLER_CONTEXT __context
240
241 #endif /* svr4 || SCO_DS */
242
243 #ifdef __EMX__
244
245 typedef struct
246 {
247 unsigned long ContextFlags;
248 FLOATING_SAVE_AREA sc_float;
249 unsigned long sc_gs;
250 unsigned long sc_fs;
251 unsigned long sc_es;
252 unsigned long sc_ds;
253 unsigned long sc_edi;
254 unsigned long sc_esi;
255 unsigned long sc_eax;
256 unsigned long sc_ebx;
257 unsigned long sc_ecx;
258 unsigned long sc_edx;
259 unsigned long sc_ebp;
260 unsigned long sc_eip;
261 unsigned long sc_cs;
262 unsigned long sc_eflags;
263 unsigned long sc_esp;
264 unsigned long sc_ss;
265 } SIGCONTEXT;
266
267 #endif /* __EMX__ */
268
269 #ifdef __CYGWIN__
270
271 /* FIXME: This section is just here so it can compile, it's most likely
272 * completely wrong. */
273
274 typedef struct
275 {
276 unsigned short sc_gs, __gsh;
277 unsigned short sc_fs, __fsh;
278 unsigned short sc_es, __esh;
279 unsigned short sc_ds, __dsh;
280 unsigned long sc_edi;
281 unsigned long sc_esi;
282 unsigned long sc_ebp;
283 unsigned long sc_esp;
284 unsigned long sc_ebx;
285 unsigned long sc_edx;
286 unsigned long sc_ecx;
287 unsigned long sc_eax;
288 unsigned long sc_trapno;
289 unsigned long sc_err;
290 unsigned long sc_eip;
291 unsigned short sc_cs, __csh;
292 unsigned long sc_eflags;
293 unsigned long esp_at_signal;
294 unsigned short sc_ss, __ssh;
295 unsigned long i387;
296 unsigned long oldmask;
297 unsigned long cr2;
298 } SIGCONTEXT;
299
300 #define HANDLER_DEF(name) void name( int __signal, SIGCONTEXT __context )
301 #define HANDLER_CONTEXT (&__context)
302
303 #endif /* __CYGWIN__ */
304
305 #ifdef __APPLE__
306 # include <sys/ucontext.h>
307 # include <sys/types.h>
308 # include <signal.h>
309
310 typedef ucontext_t SIGCONTEXT;
311
312 #define EAX_sig(context) ((context)->uc_mcontext->ss.eax)
313 #define EBX_sig(context) ((context)->uc_mcontext->ss.ebx)
314 #define ECX_sig(context) ((context)->uc_mcontext->ss.ecx)
315 #define EDX_sig(context) ((context)->uc_mcontext->ss.edx)
316 #define ESI_sig(context) ((context)->uc_mcontext->ss.esi)
317 #define EDI_sig(context) ((context)->uc_mcontext->ss.edi)
318 #define EBP_sig(context) ((context)->uc_mcontext->ss.ebp)
319
320 #define CS_sig(context) ((context)->uc_mcontext->ss.cs)
321 #define DS_sig(context) ((context)->uc_mcontext->ss.ds)
322 #define ES_sig(context) ((context)->uc_mcontext->ss.es)
323 #define FS_sig(context) ((context)->uc_mcontext->ss.fs)
324 #define GS_sig(context) ((context)->uc_mcontext->ss.gs)
325 #define SS_sig(context) ((context)->uc_mcontext->ss.ss)
326
327 #define EFL_sig(context) ((context)->uc_mcontext->ss.eflags)
328
329 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
330 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.esp))
331
332 #define HANDLER_DEF(name) void name( int __signal, siginfo_t *__siginfo, SIGCONTEXT *__context )
333 #define HANDLER_CONTEXT (__context)
334
335 #define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
336 #define ERROR_sig(context) ((context)->uc_mcontext->es.err)
337
338 #define FAULT_ADDRESS (__siginfo->si_addr)
339
340 #endif /* __APPLE__ */
341
342 #if defined(linux) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) ||\
343 defined(__OpenBSD__) || defined(__EMX__) || defined(__CYGWIN__)
344
345 #define EAX_sig(context) ((context)->sc_eax)
346 #define EBX_sig(context) ((context)->sc_ebx)
347 #define ECX_sig(context) ((context)->sc_ecx)
348 #define EDX_sig(context) ((context)->sc_edx)
349 #define ESI_sig(context) ((context)->sc_esi)
350 #define EDI_sig(context) ((context)->sc_edi)
351 #define EBP_sig(context) ((context)->sc_ebp)
352
353 #define CS_sig(context) ((context)->sc_cs)
354 #define DS_sig(context) ((context)->sc_ds)
355 #define ES_sig(context) ((context)->sc_es)
356 #define FS_sig(context) ((context)->sc_fs)
357 #define GS_sig(context) ((context)->sc_gs)
358 #define SS_sig(context) ((context)->sc_ss)
359
360 #define TRAP_sig(context) ((context)->sc_trapno)
361
362 #ifdef __NetBSD__
363 #define ERROR_sig(context) ((context)->sc_err)
364 #endif
365
366 #ifdef linux
367 #define ERROR_sig(context) ((context)->sc_err)
368 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->i387))
369 #define FAULT_ADDRESS ((void *)HANDLER_CONTEXT->cr2)
370 #endif
371
372 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
373 #define EFL_sig(context) ((context)->sc_efl)
374 /* FreeBSD, see i386/i386/traps.c::trap_pfault va->err kludge */
375 #define FAULT_ADDRESS ((void *)HANDLER_CONTEXT->sc_err)
376 #else
377 #define EFL_sig(context) ((context)->sc_eflags)
378 #endif
379
380 #define EIP_sig(context) (*((unsigned long*)&(context)->sc_eip))
381 #define ESP_sig(context) (*((unsigned long*)&(context)->sc_esp))
382
383 #endif /* linux || __NetBSD__ || __FreeBSD__ || __OpenBSD__ */
384
385 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
386
387 #ifdef _SCO_DS
388 #define gregs regs
389 #endif
390
391 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
392 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
393 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
394 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
395 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
396 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
397 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
398
399 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
400 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
401 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
402 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
403
404 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
405 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
406
407 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
408
409 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
410 #ifdef UESP
411 #define ESP_sig(context) ((context)->uc_mcontext.gregs[UESP])
412 #elif defined(R_ESP)
413 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
414 #else
415 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
416 #endif
417 #ifdef TRAPNO
418 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
419 #endif
420
421 #define FAULT_ADDRESS (__siginfo->si_addr)
422
423 #endif /* svr4 || SCO_DS */
424
425 #include "wine/exception.h"
426 #include "wine/debug.h"
427
428 WINE_DEFAULT_DEBUG_CHANNEL(seh);
429
430 typedef int (*wine_signal_handler)(unsigned int sig);
431
432 static size_t signal_stack_mask;
433 static size_t signal_stack_size;
434
435 static wine_signal_handler handlers[256];
436
437 extern void DECLSPEC_NORETURN __wine_call_from_32_restore_regs( const CONTEXT *context );
438
439 enum i386_trap_code
440 {
441 TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
442 TRAP_x86_DIVIDE = 0, /* Division by zero exception */
443 TRAP_x86_TRCTRAP = 1, /* Single-step exception */
444 TRAP_x86_NMI = 2, /* NMI interrupt */
445 TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
446 TRAP_x86_OFLOW = 4, /* Overflow exception */
447 TRAP_x86_BOUND = 5, /* Bound range exception */
448 TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
449 TRAP_x86_DNA = 7, /* Device not available exception */
450 TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
451 TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
452 TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
453 TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
454 TRAP_x86_STKFLT = 12, /* Stack fault */
455 TRAP_x86_PROTFLT = 13, /* General protection fault */
456 TRAP_x86_PAGEFLT = 14, /* Page fault */
457 TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
458 TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
459 TRAP_x86_MCHK = 18, /* Machine check exception */
460 TRAP_x86_CACHEFLT = 19 /* Cache flush exception */
461 };
462
463
464 /***********************************************************************
465 * dispatch_signal
466 */
467 inline static int dispatch_signal(unsigned int sig)
468 {
469 if (handlers[sig] == NULL) return 0;
470 return handlers[sig](sig);
471 }
472
473
474 /***********************************************************************
475 * get_trap_code
476 *
477 * Get the trap code for a signal.
478 */
479 static inline enum i386_trap_code get_trap_code( const SIGCONTEXT *sigcontext )
480 {
481 #ifdef TRAP_sig
482 return TRAP_sig(sigcontext);
483 #else
484 return TRAP_x86_UNKNOWN; /* unknown trap code */
485 #endif
486 }
487
488 /***********************************************************************
489 * get_error_code
490 *
491 * Get the error code for a signal.
492 */
493 static inline WORD get_error_code( const SIGCONTEXT *sigcontext )
494 {
495 #ifdef ERROR_sig
496 return ERROR_sig(sigcontext);
497 #else
498 return 0;
499 #endif
500 }
501
502 /***********************************************************************
503 * get_signal_stack
504 *
505 * Get the base of the signal stack for the current thread.
506 */
507 static inline void *get_signal_stack(void)
508 {
509 return (char *)NtCurrentTeb() + 4096;
510 }
511
512
513 /***********************************************************************
514 * get_current_teb
515 *
516 * Get the current teb based on the stack pointer.
517 */
518 static inline TEB *get_current_teb(void)
519 {
520 unsigned long esp;
521 __asm__("movl %%esp,%0" : "=g" (esp) );
522 return (TEB *)(esp & ~signal_stack_mask);
523 }
524
525
526 #ifdef __HAVE_VM86
527 /***********************************************************************
528 * save_vm86_context
529 *
530 * Set the register values from a vm86 structure.
531 */
532 static void save_vm86_context( CONTEXT *context, const struct vm86plus_struct *vm86 )
533 {
534 context->ContextFlags = CONTEXT_FULL;
535 context->Eax = vm86->regs.eax;
536 context->Ebx = vm86->regs.ebx;
537 context->Ecx = vm86->regs.ecx;
538 context->Edx = vm86->regs.edx;
539 context->Esi = vm86->regs.esi;
540 context->Edi = vm86->regs.edi;
541 context->Esp = vm86->regs.esp;
542 context->Ebp = vm86->regs.ebp;
543 context->Eip = vm86->regs.eip;
544 context->SegCs = vm86->regs.cs;
545 context->SegDs = vm86->regs.ds;
546 context->SegEs = vm86->regs.es;
547 context->SegFs = vm86->regs.fs;
548 context->SegGs = vm86->regs.gs;
549 context->SegSs = vm86->regs.ss;
550 context->EFlags = vm86->regs.eflags;
551 }
552
553
554 /***********************************************************************
555 * restore_vm86_context
556 *
557 * Build a vm86 structure from the register values.
558 */
559 static void restore_vm86_context( const CONTEXT *context, struct vm86plus_struct *vm86 )
560 {
561 vm86->regs.eax = context->Eax;
562 vm86->regs.ebx = context->Ebx;
563 vm86->regs.ecx = context->Ecx;
564 vm86->regs.edx = context->Edx;
565 vm86->regs.esi = context->Esi;
566 vm86->regs.edi = context->Edi;
567 vm86->regs.esp = context->Esp;
568 vm86->regs.ebp = context->Ebp;
569 vm86->regs.eip = context->Eip;
570 vm86->regs.cs = context->SegCs;
571 vm86->regs.ds = context->SegDs;
572 vm86->regs.es = context->SegEs;
573 vm86->regs.fs = context->SegFs;
574 vm86->regs.gs = context->SegGs;
575 vm86->regs.ss = context->SegSs;
576 vm86->regs.eflags = context->EFlags;
577 }
578
579
580 /**********************************************************************
581 * merge_vm86_pending_flags
582 *
583 * Merges TEB.vm86_ptr and TEB.vm86_pending VIP flags and
584 * raises exception if there are pending events and VIF flag
585 * has been turned on.
586 *
587 * Called from __wine_enter_vm86 because vm86_enter
588 * doesn't check for pending events.
589 *
590 * Called from raise_vm86_sti_exception to check for
591 * pending events in a signal safe way.
592 */
593 static void merge_vm86_pending_flags( EXCEPTION_RECORD *rec )
594 {
595 BOOL check_pending = TRUE;
596 struct vm86plus_struct *vm86 =
597 (struct vm86plus_struct*)(ntdll_get_thread_data()->vm86_ptr);
598
599 /*
600 * In order to prevent a race when SIGUSR2 occurs while
601 * we are returning from exception handler, pending events
602 * will be rechecked after each raised exception.
603 */
604 while (check_pending && NtCurrentTeb()->vm86_pending)
605 {
606 check_pending = FALSE;
607 ntdll_get_thread_data()->vm86_ptr = NULL;
608
609 /*
610 * If VIF is set, throw exception.
611 * Note that SIGUSR2 may turn VIF flag off so
612 * VIF check must occur only when TEB.vm86_ptr is NULL.
613 */
614 if (vm86->regs.eflags & VIF_MASK)
615 {
616 CONTEXT vcontext;
617 save_vm86_context( &vcontext, vm86 );
618
619 rec->ExceptionCode = EXCEPTION_VM86_STI;
620 rec->ExceptionFlags = EXCEPTION_CONTINUABLE;
621 rec->ExceptionRecord = NULL;
622 rec->NumberParameters = 0;
623 rec->ExceptionAddress = (LPVOID)vcontext.Eip;
624
625 vcontext.EFlags &= ~VIP_MASK;
626 NtCurrentTeb()->vm86_pending = 0;
627 __regs_RtlRaiseException( rec, &vcontext );
628
629 restore_vm86_context( &vcontext, vm86 );
630 check_pending = TRUE;
631 }
632
633 ntdll_get_thread_data()->vm86_ptr = vm86;
634 }
635
636 /*
637 * Merge VIP flags in a signal safe way. This requires
638 * that the following operation compiles into atomic
639 * instruction.
640 */
641 vm86->regs.eflags |= NtCurrentTeb()->vm86_pending;
642 }
643 #endif /* __HAVE_VM86 */
644
645
646 typedef void (WINAPI *raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
647
648
649 /***********************************************************************
650 * init_handler
651 *
652 * Handler initialization when the full context is not needed.
653 */
654 inline static void *init_handler( const SIGCONTEXT *sigcontext, WORD *fs, WORD *gs )
655 {
656 void *stack = (void *)ESP_sig(sigcontext);
657 TEB *teb = get_current_teb();
658 struct ntdll_thread_regs *thread_regs = (struct ntdll_thread_regs *)teb->SpareBytes1;
659
660 /* get %fs and %gs at time of the fault */
661 #ifdef FS_sig
662 *fs = LOWORD(FS_sig(sigcontext));
663 #else
664 *fs = wine_get_fs();
665 #endif
666 #ifdef GS_sig
667 *gs = LOWORD(GS_sig(sigcontext));
668 #else
669 *gs = wine_get_gs();
670 #endif
671
672 wine_set_fs( thread_regs->fs );
673
674 /* now restore a proper %gs for the fault handler */
675 if (!wine_ldt_is_system(CS_sig(sigcontext)) ||
676 !wine_ldt_is_system(SS_sig(sigcontext))) /* 16-bit mode */
677 {
678 /*
679 * Win16 or DOS protected mode. Note that during switch
680 * from 16-bit mode to linear mode, CS may be set to system
681 * segment before FS is restored. Fortunately, in this case
682 * SS is still non-system segment. This is why both CS and SS
683 * are checked.
684 */
685 wine_set_gs( thread_regs->gs );
686 stack = teb->WOW32Reserved;
687 }
688 #ifdef __HAVE_VM86
689 else if ((void *)EIP_sig(sigcontext) == vm86_return) /* vm86 mode */
690 {
691 unsigned int *int_stack = stack;
692 /* fetch the saved %gs from the stack */
693 wine_set_gs( int_stack[0] );
694 }
695 #endif
696 else /* 32-bit mode */
697 {
698 #ifdef GS_sig
699 wine_set_gs( GS_sig(sigcontext) );
700 #endif
701 }
702 return stack;
703 }
704
705
706 /***********************************************************************
707 * save_fpu
708 *
709 * Set the FPU context from a sigcontext.
710 */
711 inline static void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
712 {
713 context->ContextFlags |= CONTEXT86_FLOATING_POINT;
714 #ifdef FPU_sig
715 if (FPU_sig(sigcontext))
716 {
717 context->FloatSave = *FPU_sig(sigcontext);
718 return;
719 }
720 #endif /* FPU_sig */
721 #ifdef __GNUC__
722 __asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) );
723 #endif /* __GNUC__ */
724 }
725
726
727 /***********************************************************************
728 * restore_fpu
729 *
730 * Restore the FPU context to a sigcontext.
731 */
732 inline static void restore_fpu( const CONTEXT *context )
733 {
734 FLOATING_SAVE_AREA float_status = context->FloatSave;
735 /* reset the current interrupt status */
736 float_status.StatusWord &= float_status.ControlWord | 0xffffff80;
737 #ifdef __GNUC__
738 __asm__ __volatile__( "frstor %0; fwait" : : "m" (float_status) );
739 #endif /* __GNUC__ */
740 }
741
742
743 /***********************************************************************
744 * save_context
745 *
746 * Build a context structure from the signal info.
747 */
748 inline static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext, WORD fs, WORD gs )
749 {
750 struct ntdll_thread_regs * const regs = ntdll_get_thread_regs();
751
752 memset(context, 0, sizeof(*context));
753 context->ContextFlags = CONTEXT_FULL | CONTEXT_DEBUG_REGISTERS;
754 context->Eax = EAX_sig(sigcontext);
755 context->Ebx = EBX_sig(sigcontext);
756 context->Ecx = ECX_sig(sigcontext);
757 context->Edx = EDX_sig(sigcontext);
758 context->Esi = ESI_sig(sigcontext);
759 context->Edi = EDI_sig(sigcontext);
760 context->Ebp = EBP_sig(sigcontext);
761 context->EFlags = EFL_sig(sigcontext);
762 context->Eip = EIP_sig(sigcontext);
763 context->Esp = ESP_sig(sigcontext);
764 context->SegCs = LOWORD(CS_sig(sigcontext));
765 context->SegDs = LOWORD(DS_sig(sigcontext));
766 context->SegEs = LOWORD(ES_sig(sigcontext));
767 context->SegFs = fs;
768 context->SegGs = gs;
769 context->SegSs = LOWORD(SS_sig(sigcontext));
770 context->Dr0 = regs->dr0;
771 context->Dr1 = regs->dr1;
772 context->Dr2 = regs->dr2;
773 context->Dr3 = regs->dr3;
774 context->Dr6 = regs->dr6;
775 context->Dr7 = regs->dr7;
776 }
777
778
779 /***********************************************************************
780 * restore_context
781 *
782 * Restore the signal info from the context.
783 */
784 inline static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
785 {
786 struct ntdll_thread_regs * const regs = ntdll_get_thread_regs();
787
788 regs->dr0 = context->Dr0;
789 regs->dr1 = context->Dr1;
790 regs->dr2 = context->Dr2;
791 regs->dr3 = context->Dr3;
792 regs->dr6 = context->Dr6;
793 regs->dr7 = context->Dr7;
794 EAX_sig(sigcontext) = context->Eax;
795 EBX_sig(sigcontext) = context->Ebx;
796 ECX_sig(sigcontext) = context->Ecx;
797 EDX_sig(sigcontext) = context->Edx;
798 ESI_sig(sigcontext) = context->Esi;
799 EDI_sig(sigcontext) = context->Edi;
800 EBP_sig(sigcontext) = context->Ebp;
801 EFL_sig(sigcontext) = context->EFlags;
802 EIP_sig(sigcontext) = context->Eip;
803 ESP_sig(sigcontext) = context->Esp;
804 CS_sig(sigcontext) = context->SegCs;
805 DS_sig(sigcontext) = context->SegDs;
806 ES_sig(sigcontext) = context->SegEs;
807 SS_sig(sigcontext) = context->SegSs;
808 #ifdef GS_sig
809 GS_sig(sigcontext) = context->SegGs;
810 #else
811 wine_set_gs( context->SegGs );
812 #endif
813 #ifdef FS_sig
814 FS_sig(sigcontext) = context->SegFs;
815 #else
816 wine_set_fs( context->SegFs );
817 #endif
818 }
819
820
821 /***********************************************************************
822 * set_cpu_context
823 *
824 * Set the new CPU context. Used by NtSetContextThread.
825 */
826 void set_cpu_context( const CONTEXT *context )
827 {
828 DWORD flags = context->ContextFlags & ~CONTEXT_i386;
829
830 if (flags & CONTEXT_FLOATING_POINT) restore_fpu( context );
831
832 if (flags & CONTEXT_DEBUG_REGISTERS)
833 {
834 struct ntdll_thread_regs * const regs = ntdll_get_thread_regs();
835 regs->dr0 = context->Dr0;
836 regs->dr1 = context->Dr1;
837 regs->dr2 = context->Dr2;
838 regs->dr3 = context->Dr3;
839 regs->dr6 = context->Dr6;
840 regs->dr7 = context->Dr7;
841 }
842 if (flags & CONTEXT_FULL)
843 {
844 if ((flags & CONTEXT_FULL) != (CONTEXT_FULL & ~CONTEXT_i386))
845 FIXME( "setting partial context (%lx) not supported\n", flags );
846 else
847 __wine_call_from_32_restore_regs( context );
848 }
849 }
850
851
852 /***********************************************************************
853 * is_privileged_instr
854 *
855 * Check if the fault location is a privileged instruction.
856 * Based on the instruction emulation code in dlls/kernel/instr.c.
857 */
858 static inline int is_privileged_instr( CONTEXT86 *context )
859 {
860 const BYTE *instr;
861 unsigned int prefix_count = 0;
862
863 if (!wine_ldt_is_system( context->SegCs )) return 0;
864 instr = (BYTE *)context->Eip;
865
866 for (;;) switch(*instr)
867 {
868 /* instruction prefixes */
869 case 0x2e: /* %cs: */
870 case 0x36: /* %ss: */
871 case 0x3e: /* %ds: */
872 case 0x26: /* %es: */
873 case 0x64: /* %fs: */
874 case 0x65: /* %gs: */
875 case 0x66: /* opcode size */
876 case 0x67: /* addr size */
877 case 0xf0: /* lock */
878 case 0xf2: /* repne */
879 case 0xf3: /* repe */
880 if (++prefix_count >= 15) return 0;
881 instr++;
882 continue;
883
884 case 0x0f: /* extended instruction */
885 switch(instr[1])
886 {
887 case 0x20: /* mov crX, reg */
888 case 0x21: /* mov drX, reg */
889 case 0x22: /* mov reg, crX */
890 case 0x23: /* mov reg drX */
891 return 1;
892 }
893 return 0;
894 case 0x6c: /* insb (%dx) */
895 case 0x6d: /* insl (%dx) */
896 case 0x6e: /* outsb (%dx) */
897 case 0x6f: /* outsl (%dx) */
898 case 0xcd: /* int $xx */
899 case 0xe4: /* inb al,XX */
900 case 0xe5: /* in (e)ax,XX */
901 case 0xe6: /* outb XX,al */
902 case 0xe7: /* out XX,(e)ax */
903 case 0xec: /* inb (%dx),%al */
904 case 0xed: /* inl (%dx),%eax */
905 case 0xee: /* outb %al,(%dx) */
906 case 0xef: /* outl %eax,(%dx) */
907 case 0xf4: /* hlt */
908 case 0xfa: /* cli */
909 case 0xfb: /* sti */
910 return 1;
911 default:
912 return 0;
913 }
914 }
915
916
917 #include "pshpack1.h"
918 struct atl_thunk
919 {
920 DWORD movl; /* movl this,4(%esp) */
921 DWORD this;
922 BYTE jmp; /* jmp func */
923 int func;
924 };
925 #include "poppack.h"
926
927 /**********************************************************************
928 * check_atl_thunk
929 *
930 * Check if code destination is an ATL thunk, and emulate it if so.
931 */
932 static BOOL check_atl_thunk( EXCEPTION_RECORD *rec, CONTEXT *context )
933 {
934 struct atl_thunk *thunk = (struct atl_thunk *)rec->ExceptionInformation[1];
935
936 if (thunk->movl != 0x042444c7 || thunk->jmp != 0xe9) return FALSE;
937 *((DWORD *)context->Esp + 1) = thunk->this;
938 context->Eip = (DWORD_PTR)(&thunk->func + 1) + thunk->func;
939 TRACE( "emulating ATL thunk at %p, func=%08lx arg=%08lx\n",
940 thunk, context->Eip, *((DWORD *)context->Esp + 1) );
941 return TRUE;
942 }
943
944
945 /***********************************************************************
946 * setup_exception
947 *
948 * Setup a proper stack frame for the raise function, and modify the
949 * sigcontext so that the return from the signal handler will call
950 * the raise function.
951 */
952 static EXCEPTION_RECORD *setup_exception( SIGCONTEXT *sigcontext, raise_func func )
953 {
954 struct stack_layout
955 {
956 void *ret_addr; /* return address from raise_func */
957 EXCEPTION_RECORD *rec_ptr; /* first arg for raise_func */
958 CONTEXT *context_ptr; /* second arg for raise_func */
959 CONTEXT context;
960 EXCEPTION_RECORD rec;
961 DWORD ebp;
962 DWORD eip;
963 } *stack;
964
965 WORD fs, gs;
966
967 stack = init_handler( sigcontext, &fs, &gs );
968
969 /* stack sanity checks */
970
971 if ((char *)stack >= (char *)get_signal_stack() &&
972 (char *)stack < (char *)get_signal_stack() + signal_stack_size)
973 {
974 ERR( "nested exception on signal stack in thread %04lx eip %08lx esp %08lx stack %p-%p\n",
975 GetCurrentThreadId(), EIP_sig(sigcontext), ESP_sig(sigcontext),
976 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
977 server_abort_thread(1);
978 }
979
980 if (stack - 1 > stack || /* check for overflow in subtraction */
981 (char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit ||
982 (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
983 {
984 UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)stack;
985 if (diff < 4096)
986 {
987 ERR( "stack overflow %u bytes in thread %04lx eip %08lx esp %08lx stack %p-%p\n",
988 diff, GetCurrentThreadId(), EIP_sig(sigcontext), ESP_sig(sigcontext),
989 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
990 server_abort_thread(1);
991 }
992 else WARN( "exception outside of stack limits in thread %04lx eip %08lx esp %08lx stack %p-%p\n",
993 GetCurrentThreadId(), EIP_sig(sigcontext), ESP_sig(sigcontext),
994 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
995 }
996
997 stack--; /* push the stack_layout structure */
998 #ifdef HAVE_VALGRIND_MEMCHECK_H
999 VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack));
1000 #endif
1001 stack->ret_addr = (void *)0xdeadbabe; /* raise_func must not return */
1002 stack->rec_ptr = &stack->rec;
1003 stack->context_ptr = &stack->context;
1004
1005 stack->rec.ExceptionRecord = NULL;
1006 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1007 stack->rec.ExceptionAddress = (LPVOID)EIP_sig(sigcontext);
1008 stack->rec.NumberParameters = 0;
1009
1010 save_context( &stack->context, sigcontext, fs, gs );
1011
1012 /* now modify the sigcontext to return to the raise function */
1013 ESP_sig(sigcontext) = (DWORD)stack;
1014 EIP_sig(sigcontext) = (DWORD)func;
1015 EFL_sig(sigcontext) &= ~0x100; /* clear single-step flag */
1016 CS_sig(sigcontext) = wine_get_cs();
1017 DS_sig(sigcontext) = wine_get_ds();
1018 ES_sig(sigcontext) = wine_get_es();
1019 FS_sig(sigcontext) = wine_get_fs();
1020 GS_sig(sigcontext) = wine_get_gs();
1021 SS_sig(sigcontext) = wine_get_ss();
1022
1023 return stack->rec_ptr;
1024 }
1025
1026
1027 /***********************************************************************
1028 * get_exception_context
1029 *
1030 * Get a pointer to the context built by setup_exception.
1031 */
1032 static inline CONTEXT *get_exception_context( EXCEPTION_RECORD *rec )
1033 {
1034 return (CONTEXT *)rec - 1; /* cf. stack_layout structure */
1035 }
1036
1037
1038 /**********************************************************************
1039 * get_fpu_code
1040 *
1041 * Get the FPU exception code from the FPU status.
1042 */
1043 static inline DWORD get_fpu_code( const CONTEXT *context )
1044 {
1045 DWORD status = context->FloatSave.StatusWord;
1046
1047 if (status & 0x01) /* IE */
1048 {
1049 if (status & 0x40) /* SF */
1050 return EXCEPTION_FLT_STACK_CHECK;
1051 else
1052 return EXCEPTION_FLT_INVALID_OPERATION;
1053 }
1054 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
1055 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
1056 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
1057 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
1058 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
1059 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
1060 }
1061
1062
1063 /**********************************************************************
1064 * raise_segv_exception
1065 */
1066 static void WINAPI raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1067 {
1068 switch(rec->ExceptionCode)
1069 {
1070 case EXCEPTION_ACCESS_VIOLATION:
1071 if (rec->NumberParameters == 2)
1072 {
1073 if ((rec->ExceptionInformation[0] == 8) && check_atl_thunk( rec, context )) goto done;
1074 rec->ExceptionCode = VIRTUAL_HandleFault( (void *)rec->ExceptionInformation[1] );
1075 }
1076 break;
1077 case EXCEPTION_DATATYPE_MISALIGNMENT:
1078 /* FIXME: pass through exception handler first? */
1079 if (context->EFlags & 0x00040000)
1080 {
1081 /* Disable AC flag, return */
1082 context->EFlags &= ~0x00040000;
1083 goto done;
1084 }
1085 break;
1086 }
1087 __regs_RtlRaiseException( rec, context );
1088 done:
1089 NtSetContextThread( GetCurrentThread(), context );
1090 }
1091
1092
1093 /**********************************************************************
1094 * raise_trap_exception
1095 */
1096 static void WINAPI raise_trap_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1097 {
1098 if (rec->ExceptionCode == EXCEPTION_SINGLE_STEP)
1099 {
1100 if (context->EFlags & 0x100)
1101 {
1102 context->EFlags &= ~0x100; /* clear single-step flag */
1103 }
1104 else /* hardware breakpoint, fetch the debug registers */
1105 {
1106 context->ContextFlags = CONTEXT_DEBUG_REGISTERS;
1107 NtGetContextThread(GetCurrentThread(), context);
1108 /* do we really have a bp from a debug register ?
1109 * if not, then someone did a kill(SIGTRAP) on us, and we
1110 * shall return a breakpoint, not a single step exception
1111 */
1112 if (!(context->Dr6 & 0xf)) rec->ExceptionCode = EXCEPTION_BREAKPOINT;
1113 context->ContextFlags |= CONTEXT_FULL; /* restore flags */
1114 }
1115 }
1116
1117 __regs_RtlRaiseException( rec, context );
1118 NtSetContextThread( GetCurrentThread(), context );
1119 }
1120
1121
1122 /**********************************************************************
1123 * raise_exception
1124 *
1125 * Generic raise function for exceptions that don't need special treatment.
1126 */
1127 static void WINAPI raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1128 {
1129 __regs_RtlRaiseException( rec, context );
1130 NtSetContextThread( GetCurrentThread(), context );
1131 }
1132
1133
1134 #ifdef __HAVE_VM86
1135 /**********************************************************************
1136 * raise_vm86_sti_exception
1137 */
1138 static void WINAPI raise_vm86_sti_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1139 {
1140 /* merge_vm86_pending_flags merges the vm86_pending flag in safely */
1141 NtCurrentTeb()->vm86_pending |= VIP_MASK;
1142
1143 if (ntdll_get_thread_data()->vm86_ptr)
1144 {
1145 if (((char*)context->Eip >= (char*)vm86_return) &&
1146 ((char*)context->Eip <= (char*)vm86_return_end) &&
1147 (VM86_TYPE(context->Eax) != VM86_SIGNAL)) {
1148 /* exiting from VM86, can't throw */
1149 goto done;
1150 }
1151 merge_vm86_pending_flags( rec );
1152 }
1153 else if (NtCurrentTeb()->dpmi_vif &&
1154 !wine_ldt_is_system(context->SegCs) &&
1155 !wine_ldt_is_system(context->SegSs))
1156 {
1157 /* Executing DPMI code and virtual interrupts are enabled. */
1158 NtCurrentTeb()->vm86_pending = 0;
1159 __regs_RtlRaiseException( rec, context );
1160 }
1161 done:
1162 NtSetContextThread( GetCurrentThread(), context );
1163 }
1164
1165
1166 /**********************************************************************
1167 * usr2_handler
1168 *
1169 * Handler for SIGUSR2.
1170 * We use it to signal that the running __wine_enter_vm86() should
1171 * immediately set VIP_MASK, causing pending events to be handled
1172 * as early as possible.
1173 */
1174 static HANDLER_DEF(usr2_handler)
1175 {
1176 EXCEPTION_RECORD *rec = setup_exception( HANDLER_CONTEXT, raise_vm86_sti_exception );
1177 rec->ExceptionCode = EXCEPTION_VM86_STI;
1178 }
1179 #endif /* __HAVE_VM86 */
1180
1181
1182 /**********************************************************************
1183 * segv_handler
1184 *
1185 * Handler for SIGSEGV and related errors.
1186 */
1187 static HANDLER_DEF(segv_handler)
1188 {
1189 EXCEPTION_RECORD *rec = setup_exception( HANDLER_CONTEXT, raise_segv_exception );
1190
1191 switch(get_trap_code(HANDLER_CONTEXT))
1192 {
1193 case TRAP_x86_OFLOW: /* Overflow exception */
1194 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
1195 break;
1196 case TRAP_x86_BOUND: /* Bound range exception */
1197 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
1198 break;
1199 case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
1200 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
1201 break;
1202 case TRAP_x86_STKFLT: /* Stack fault */
1203 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
1204 break;
1205 case TRAP_x86_SEGNPFLT: /* Segment not present exception */
1206 case TRAP_x86_PROTFLT: /* General protection fault */
1207 case TRAP_x86_UNKNOWN: /* Unknown fault code */
1208 if (!get_error_code(HANDLER_CONTEXT) && is_privileged_instr( get_exception_context(rec) ))
1209 rec->ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
1210 else
1211 {
1212 WORD err = get_error_code(HANDLER_CONTEXT);
1213 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
1214 rec->NumberParameters = 2;
1215 rec->ExceptionInformation[0] = 0;
1216 /* if error contains a LDT selector, use that as fault address */
1217 rec->ExceptionInformation[1] = (err & 7) == 4 ? (err & ~7) : 0xffffffff;
1218 }
1219 break;
1220 case TRAP_x86_PAGEFLT: /* Page fault */
1221 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
1222 #ifdef FAULT_ADDRESS
1223 rec->NumberParameters = 2;
1224 rec->ExceptionInformation[0] = (get_error_code(HANDLER_CONTEXT) >> 1) & 0x09;
1225 rec->ExceptionInformation[1] = (ULONG_PTR)FAULT_ADDRESS;
1226 #endif
1227 break;
1228 case TRAP_x86_ALIGNFLT: /* Alignment check exception */
1229 rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
1230 break;
1231 default:
1232 ERR( "Got unexpected trap %d\n", get_trap_code(HANDLER_CONTEXT) );
1233 /* fall through */
1234 case TRAP_x86_NMI: /* NMI interrupt */
1235 case TRAP_x86_DNA: /* Device not available exception */
1236 case TRAP_x86_DOUBLEFLT: /* Double fault exception */
1237 case TRAP_x86_TSSFLT: /* Invalid TSS exception */
1238 case TRAP_x86_MCHK: /* Machine check exception */
1239 case TRAP_x86_CACHEFLT: /* Cache flush exception */
1240 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
1241 break;
1242 }
1243 }
1244
1245
1246 /**********************************************************************
1247 * trap_handler
1248 *
1249 * Handler for SIGTRAP.
1250 */
1251 static HANDLER_DEF(trap_handler)
1252 {
1253 EXCEPTION_RECORD *rec = setup_exception( HANDLER_CONTEXT, raise_trap_exception );
1254
1255 switch(get_trap_code(HANDLER_CONTEXT))
1256 {
1257 case TRAP_x86_TRCTRAP: /* Single-step exception */
1258 rec->ExceptionCode = EXCEPTION_SINGLE_STEP;
1259 break;
1260 case TRAP_x86_BPTFLT: /* Breakpoint exception */
1261 rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */
1262 /* fall through */
1263 default:
1264 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
1265 break;
1266 }
1267 }
1268
1269
1270 /**********************************************************************
1271 * fpe_handler
1272 *
1273 * Handler for SIGFPE.
1274 */
1275 static HANDLER_DEF(fpe_handler)
1276 {
1277 EXCEPTION_RECORD *rec = setup_exception( HANDLER_CONTEXT, raise_exception );
1278 CONTEXT *context;
1279
1280 context = get_exception_context( rec );
1281 save_fpu( context, HANDLER_CONTEXT );
1282
1283 switch(get_trap_code(HANDLER_CONTEXT))
1284 {
1285 case TRAP_x86_DIVIDE: /* Division by zero exception */
1286 rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
1287 break;
1288 case TRAP_x86_FPOPFLT: /* Coprocessor segment overrun */
1289 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
1290 break;
1291 case TRAP_x86_ARITHTRAP: /* Floating point exception */
1292 case TRAP_x86_UNKNOWN: /* Unknown fault code */
1293 rec->ExceptionCode = get_fpu_code( context );
1294 break;
1295 default:
1296 ERR( "Got unexpected trap %d\n", get_trap_code(HANDLER_CONTEXT) );
1297 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
1298 break;
1299 }
1300 }
1301
1302
1303 /**********************************************************************
1304 * int_handler
1305 *
1306 * Handler for SIGINT.
1307 *
1308 * FIXME: should not be calling external functions on the signal stack.
1309 */
1310 static HANDLER_DEF(int_handler)
1311 {
1312 WORD fs, gs;
1313 init_handler( HANDLER_CONTEXT, &fs, &gs );
1314 if (!dispatch_signal(SIGINT))
1315 {
1316 EXCEPTION_RECORD *rec = setup_exception( HANDLER_CONTEXT, raise_exception );
1317 rec->ExceptionCode = CONTROL_C_EXIT;
1318 }
1319 }
1320
1321 /**********************************************************************
1322 * abrt_handler
1323 *
1324 * Handler for SIGABRT.
1325 */
1326 static HANDLER_DEF(abrt_handler)
1327 {
1328 EXCEPTION_RECORD *rec = setup_exception( HANDLER_CONTEXT, raise_exception );
1329 rec->ExceptionCode = EXCEPTION_WINE_ASSERTION;
1330 rec->ExceptionFlags = EH_NONCONTINUABLE;
1331 }
1332
1333
1334 /**********************************************************************
1335 * term_handler
1336 *
1337 * Handler for SIGTERM.
1338 */
1339 static HANDLER_DEF(term_handler)
1340 {
1341 WORD fs, gs;
1342 init_handler( HANDLER_CONTEXT, &fs, &gs );
1343 server_abort_thread(0);
1344 }
1345
1346
1347 /**********************************************************************
1348 * usr1_handler
1349 *
1350 * Handler for SIGUSR1, used to signal a thread that it got suspended.
1351 */
1352 static HANDLER_DEF(usr1_handler)
1353 {
1354 WORD fs, gs;
1355 CONTEXT context;
1356
1357 init_handler( HANDLER_CONTEXT, &fs, &gs );
1358 save_context( &context, HANDLER_CONTEXT, fs, gs );
1359 wait_suspend( &context );
1360 restore_context( &context, HANDLER_CONTEXT );
1361 }
1362
1363
1364 /**********************************************************************
1365 * get_signal_stack_total_size
1366 *
1367 * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
1368 * Must be a power of two.
1369 */
1370 size_t get_signal_stack_total_size(void)
1371 {
1372 static const size_t teb_size = 4096; /* we reserve one page for the TEB */
1373
1374 if (!signal_stack_size)
1375 {
1376 size_t size = 4096, min_size = teb_size + max( MINSIGSTKSZ, 4096 );
1377 /* find the first power of two not smaller than min_size */
1378 while (size < min_size) size *= 2;
1379 signal_stack_mask = size - 1;
1380 signal_stack_size = size - teb_size;
1381 }
1382 return signal_stack_size + teb_size;
1383 }
1384
1385
1386 /***********************************************************************
1387 * set_handler
1388 *
1389 * Set a signal handler
1390 */
1391 static int set_handler( int sig, int have_sigaltstack, void (*func)() )
1392 {
1393 struct sigaction sig_act;
1394
1395 #ifdef linux
1396 if (!have_sigaltstack)
1397 {
1398 struct kernel_sigaction sig_act;
1399 sig_act.ksa_handler = func;
1400 sig_act.ksa_flags = SA_RESTART;
1401 sig_act.ksa_mask = (1 << (SIGINT-1)) |
1402 (1 << (SIGUSR1-1)) |
1403 (1 << (SIGUSR2-1));
1404 /* point to the top of the signal stack */
1405 sig_act.ksa_restorer = (char *)get_signal_stack() + signal_stack_size;
1406 return wine_sigaction( sig, &sig_act, NULL );
1407 }
1408 #endif /* linux */
1409 sig_act.sa_handler = func;
1410 sigemptyset( &sig_act.sa_mask );
1411 sigaddset( &sig_act.sa_mask, SIGINT );
1412 sigaddset( &sig_act.sa_mask, SIGUSR1 );
1413 sigaddset( &sig_act.sa_mask, SIGUSR2 );
1414
1415 #if defined(linux) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__)
1416 sig_act.sa_flags = SA_RESTART;
1417 #elif defined (__svr4__) || defined(_SCO_DS) || defined(__APPLE__)
1418 sig_act.sa_flags = SA_SIGINFO | SA_RESTART;
1419 #else
1420 sig_act.sa_flags = 0;
1421 #endif
1422
1423 #ifdef SA_ONSTACK
1424 if (have_sigaltstack) sig_act.sa_flags |= SA_ONSTACK;
1425 #endif
1426 return sigaction( sig, &sig_act, NULL );
1427 }
1428
1429
1430 /***********************************************************************
1431 * __wine_set_signal_handler (NTDLL.@)
1432 */
1433 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
1434 {
1435 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
1436 if (handlers[sig] != NULL) return -2;
1437 handlers[sig] = wsh;
1438 return 0;
1439 }
1440
1441
1442 /**********************************************************************
1443 * SIGNAL_Init
1444 */
1445 BOOL SIGNAL_Init(void)
1446 {
1447 int have_sigaltstack = 0;
1448
1449 #ifdef HAVE_SIGALTSTACK
1450 struct sigaltstack ss;
1451 ss.ss_sp = get_signal_stack();
1452 ss.ss_size = signal_stack_size;
1453 ss.ss_flags = 0;
1454 if (!sigaltstack(&ss, NULL)) have_sigaltstack = 1;
1455 #ifdef linux
1456 /* sigaltstack may fail because the kernel is too old, or
1457 because glibc is brain-dead. In the latter case a
1458 direct system call should succeed. */
1459 else if (!wine_sigaltstack(&ss, NULL)) have_sigaltstack = 1;
1460 #endif /* linux */
1461 #endif /* HAVE_SIGALTSTACK */
1462
1463 if (set_handler( SIGINT, have_sigaltstack, (void (*)())int_handler ) == -1) goto error;
1464 if (set_handler( SIGFPE, have_sigaltstack, (void (*)())fpe_handler ) == -1) goto error;
1465 if (set_handler( SIGSEGV, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
1466 if (set_handler( SIGILL, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
1467 if (set_handler( SIGABRT, have_sigaltstack, (void (*)())abrt_handler ) == -1) goto error;
1468 if (set_handler( SIGTERM, have_sigaltstack, (void (*)())term_handler ) == -1) goto error;
1469 if (set_handler( SIGUSR1, have_sigaltstack, (void (*)())usr1_handler ) == -1) goto error;
1470 #ifdef SIGBUS
1471 if (set_handler( SIGBUS, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
1472 #endif
1473 #ifdef SIGTRAP
1474 if (set_handler( SIGTRAP, have_sigaltstack, (void (*)())trap_handler ) == -1) goto error;
1475 #endif
1476
1477 #ifdef __HAVE_VM86
1478 if (set_handler( SIGUSR2, have_sigaltstack, (void (*)())usr2_handler ) == -1) goto error;
1479 #endif
1480
1481 return TRUE;
1482
1483 error:
1484 perror("sigaction");
1485 return FALSE;
1486 }
1487
1488
1489 #ifdef __HAVE_VM86
1490 /**********************************************************************
1491 * __wine_enter_vm86 (NTDLL.@)
1492 *
1493 * Enter vm86 mode with the specified register context.
1494 */
1495 void __wine_enter_vm86( CONTEXT *context )
1496 {
1497 EXCEPTION_RECORD rec;
1498 int res;
1499 struct vm86plus_struct vm86;
1500
1501 memset( &vm86, 0, sizeof(vm86) );
1502 for (;;)
1503 {
1504 restore_vm86_context( context, &vm86 );
1505
1506 ntdll_get_thread_data()->vm86_ptr = &vm86;
1507 merge_vm86_pending_flags( &rec );
1508
1509 res = vm86_enter( &ntdll_get_thread_data()->vm86_ptr ); /* uses and clears teb->vm86_ptr */
1510 if (res < 0)
1511 {
1512 errno = -res;
1513 return;
1514 }
1515
1516 save_vm86_context( context, &vm86 );
1517
1518 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1519 rec.ExceptionRecord = NULL;
1520 rec.ExceptionAddress = (LPVOID)context->Eip;
1521 rec.NumberParameters = 0;
1522
1523 switch(VM86_TYPE(res))
1524 {
1525 case VM86_UNKNOWN: /* unhandled GP fault - IO-instruction or similar */
1526 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
1527 raise_segv_exception( &rec, context );
1528 continue;
1529 case VM86_TRAP: /* return due to DOS-debugger request */
1530 switch(VM86_ARG(res))
1531 {
1532 case TRAP_x86_TRCTRAP: /* Single-step exception */
1533 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
1534 break;
1535 case TRAP_x86_BPTFLT: /* Breakpoint exception */
1536 rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
1537 /* fall through */
1538 default:
1539 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
1540 break;
1541 }
1542 break;
1543 case VM86_INTx: /* int3/int x instruction (ARG = x) */
1544 rec.ExceptionCode = EXCEPTION_VM86_INTx;
1545 rec.NumberParameters = 1;
1546 rec.ExceptionInformation[0] = VM86_ARG(res);
1547 break;
1548 case VM86_STI: /* sti/popf/iret instruction enabled virtual interrupts */
1549 context->EFlags |= VIF_MASK;
1550 context->EFlags &= ~VIP_MASK;
1551 NtCurrentTeb()->vm86_pending = 0;
1552 rec.ExceptionCode = EXCEPTION_VM86_STI;
1553 break;
1554 case VM86_PICRETURN: /* return due to pending PIC request */
1555 rec.ExceptionCode = EXCEPTION_VM86_PICRETURN;
1556 break;
1557 case VM86_SIGNAL: /* cannot happen because vm86_enter handles this case */
1558 default:
1559 ERR( "unhandled result from vm86 mode %x\n", res );
1560 continue;
1561 }
1562 __regs_RtlRaiseException( &rec, context );
1563 }
1564 }
1565
1566 #else /* __HAVE_VM86 */
1567 /**********************************************************************
1568 * __wine_enter_vm86 (NTDLL.@)
1569 */
1570 void __wine_enter_vm86( CONTEXT *context )
1571 {
1572 MESSAGE("vm86 mode not supported on this platform\n");
1573 }
1574 #endif /* __HAVE_VM86 */
1575
1576 /**********************************************************************
1577 * DbgBreakPoint (NTDLL.@)
1578 */
1579 __ASM_GLOBAL_FUNC( DbgBreakPoint, "int $3; ret");
1580
1581 /**********************************************************************
1582 * DbgUserBreakPoint (NTDLL.@)
1583 */
1584 __ASM_GLOBAL_FUNC( DbgUserBreakPoint, "int $3; ret");
1585
1586
1587 /**********************************************************************
1588 * EXC_CallHandler (internal)
1589 *
1590 * Some exception handlers depend on EBP to have a fixed position relative to
1591 * the exception frame.
1592 * Shrinker depends on (*1) doing what it does,
1593 * (*2) being the exact instruction it is and (*3) beginning with 0x64
1594 * (i.e. the %fs prefix to the movl instruction). It also depends on the
1595 * function calling the handler having only 5 parameters (*4).
1596 */
1597 __ASM_GLOBAL_FUNC( EXC_CallHandler,
1598 " pushl %ebp\n"
1599 " movl %esp, %ebp\n"
1600 " subl $4,%esp\n"
1601 " movl 28(%ebp), %edx\n" /* ugly hack to pass the 6th param needed because of Shrinker */
1602 " pushl 24(%ebp)\n"
1603 " pushl 20(%ebp)\n"
1604 " pushl 16(%ebp)\n"
1605 " pushl 12(%ebp)\n"
1606 " pushl 8(%ebp)\n"
1607 " call " __ASM_NAME("call_exception_handler") "\n"
1608 " leave\n"
1609 " ret\n"
1610 );
1611 __ASM_GLOBAL_FUNC(call_exception_handler,
1612 " pushl %ebp\n"
1613 " movl %esp, %ebp\n"
1614 " subl $12,%esp\n"
1615 " pushl 12(%ebp)\n" /* make any exceptions in this... */
1616 " pushl %edx\n" /* handler be handled by... */
1617 " .byte 0x64\n"
1618 " pushl (0)\n" /* nested_handler (passed in edx). */
1619 " .byte 0x64\n"
1620 " movl %esp,(0)\n" /* push the new exception frame onto the exception stack. */
1621 " pushl 20(%ebp)\n"
1622 " pushl 16(%ebp)\n"
1623 " pushl 12(%ebp)\n"
1624 " pushl 8(%ebp)\n"
1625 " movl 24(%ebp), %ecx\n" /* (*1) */
1626 " call *%ecx\n" /* call handler. (*2) */
1627 " .byte 0x64\n"
1628 " movl (0), %esp\n" /* restore previous... (*3) */
1629 " .byte 0x64\n"
1630 " popl (0)\n" /* exception frame. */
1631 " movl %ebp, %esp\n" /* restore saved stack, in case it was corrupted */
1632 " popl %ebp\n"
1633 " ret $20\n" /* (*4) */
1634 );
1635 #endif /* __i386__ */
Quick hack tree for wine patches julliard doesn't want to commit