2 * i386 signal handling routines
4 * Copyright 1999 Alexandre Julliard
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.
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.
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
24 #include "wine/port.h"
34 #ifdef HAVE_SYS_PARAM_H
35 # include <sys/param.h>
40 # ifdef HAVE_SYS_SYSCALL_H
41 # include <sys/syscall.h>
45 #ifdef HAVE_SYS_VM86_H
46 # include <sys/vm86.h>
49 #ifdef HAVE_SYS_SIGNAL_H
50 # include <sys/signal.h>
55 #include "wine/library.h"
57 #include "selectors.h"
59 /***********************************************************************
60 * signal context platform-specific definitions
66 unsigned short sc_gs
, __gsh
;
67 unsigned short sc_fs
, __fsh
;
68 unsigned short sc_es
, __esh
;
69 unsigned short sc_ds
, __dsh
;
78 unsigned long sc_trapno
;
81 unsigned short sc_cs
, __csh
;
82 unsigned long sc_eflags
;
83 unsigned long esp_at_signal
;
84 unsigned short sc_ss
, __ssh
;
86 unsigned long oldmask
;
90 #define HANDLER_DEF(name) void name( int __signal, SIGCONTEXT __context )
91 #define HANDLER_CONTEXT (&__context)
93 /* this is the sigaction structure from the Linux 2.1.20 kernel. */
94 struct kernel_sigaction
96 void (*ksa_handler
)();
97 unsigned long ksa_mask
;
98 unsigned long ksa_flags
;
102 /* Similar to the sigaction function in libc, except it leaves alone the
103 restorer field, which is used to specify the signal stack address */
104 static inline int wine_sigaction( int sig
, struct kernel_sigaction
*new,
105 struct kernel_sigaction
*old
)
107 __asm__
__volatile__( "pushl %%ebx\n\t"
112 : "0" (SYS_sigaction
), "r" (sig
), "c" (new), "d" (old
) );
113 if (sig
>=0) return 0;
118 #ifdef HAVE_SIGALTSTACK
119 /* direct syscall for sigaltstack to work around glibc 2.0 brain-damage */
120 static inline int wine_sigaltstack( const struct sigaltstack
*new,
121 struct sigaltstack
*old
)
124 __asm__
__volatile__( "pushl %%ebx\n\t"
129 : "0" (SYS_sigaltstack
), "r" (new), "c" (old
) );
130 if (ret
>= 0) return 0;
136 #define VM86_EAX 0 /* the %eax value while vm86_enter is executing */
138 int vm86_enter( void **vm86_ptr
);
139 void vm86_return(void);
140 void vm86_return_end(void);
141 __ASM_GLOBAL_FUNC(vm86_enter
,
143 "movl %esp, %ebp\n\t"
144 "movl $166,%eax\n\t" /*SYS_vm86*/
145 "movl 8(%ebp),%ecx\n\t" /* vm86_ptr */
146 "movl (%ecx),%ecx\n\t"
148 "movl $1,%ebx\n\t" /*VM86_ENTER*/
149 "pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */
153 ".globl " __ASM_NAME("vm86_return") "\n\t"
154 __ASM_FUNC("vm86_return") "\n"
155 __ASM_NAME("vm86_return") ":\n\t"
161 "testl %eax,%eax\n\t"
163 "cmpb $0,%al\n\t" /* VM86_SIGNAL */
164 "je " __ASM_NAME("vm86_enter") "\n\t"
166 "movl 4(%esp),%ecx\n\t" /* vm86_ptr */
168 ".globl " __ASM_NAME("vm86_return_end") "\n\t"
169 __ASM_FUNC("vm86_return_end") "\n"
170 __ASM_NAME("vm86_return_end") ":\n\t"
173 #ifdef HAVE_SYS_VM86_H
181 #define EAX_sig(context) ((context)->tf_eax)
182 #define EBX_sig(context) ((context)->tf_ebx)
183 #define ECX_sig(context) ((context)->tf_ecx)
184 #define EDX_sig(context) ((context)->tf_edx)
185 #define ESI_sig(context) ((context)->tf_esi)
186 #define EDI_sig(context) ((context)->tf_edi)
187 #define EBP_sig(context) ((context)->tf_ebp)
189 #define CS_sig(context) ((context)->tf_cs)
190 #define DS_sig(context) ((context)->tf_ds)
191 #define ES_sig(context) ((context)->tf_es)
192 #define SS_sig(context) ((context)->tf_ss)
194 #include <machine/frame.h>
195 typedef struct trapframe SIGCONTEXT
;
197 #define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
198 #define HANDLER_CONTEXT __context
200 #define EFL_sig(context) ((context)->tf_eflags)
202 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
203 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
207 #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
209 typedef struct sigcontext SIGCONTEXT
;
211 #define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
212 #define HANDLER_CONTEXT __context
216 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
219 #include <sys/regset.h>
223 #include <sys/ucontext.h>
225 typedef struct ucontext SIGCONTEXT
;
227 #define HANDLER_DEF(name) void name( int __signal, void *__siginfo, SIGCONTEXT *__context )
228 #define HANDLER_CONTEXT __context
230 #endif /* svr4 || SCO_DS */
236 unsigned long ContextFlags
;
237 FLOATING_SAVE_AREA sc_float
;
242 unsigned long sc_edi
;
243 unsigned long sc_esi
;
244 unsigned long sc_eax
;
245 unsigned long sc_ebx
;
246 unsigned long sc_ecx
;
247 unsigned long sc_edx
;
248 unsigned long sc_ebp
;
249 unsigned long sc_eip
;
251 unsigned long sc_eflags
;
252 unsigned long sc_esp
;
260 /* FIXME: This section is just here so it can compile, it's most likely
261 * completely wrong. */
265 unsigned short sc_gs
, __gsh
;
266 unsigned short sc_fs
, __fsh
;
267 unsigned short sc_es
, __esh
;
268 unsigned short sc_ds
, __dsh
;
269 unsigned long sc_edi
;
270 unsigned long sc_esi
;
271 unsigned long sc_ebp
;
272 unsigned long sc_esp
;
273 unsigned long sc_ebx
;
274 unsigned long sc_edx
;
275 unsigned long sc_ecx
;
276 unsigned long sc_eax
;
277 unsigned long sc_trapno
;
278 unsigned long sc_err
;
279 unsigned long sc_eip
;
280 unsigned short sc_cs
, __csh
;
281 unsigned long sc_eflags
;
282 unsigned long esp_at_signal
;
283 unsigned short sc_ss
, __ssh
;
285 unsigned long oldmask
;
289 #define HANDLER_DEF(name) void name( int __signal, SIGCONTEXT __context )
290 #define HANDLER_CONTEXT (&__context)
292 #endif /* __CYGWIN__ */
294 #if defined(linux) || defined(__NetBSD__) || defined(__FreeBSD__) ||\
295 defined(__OpenBSD__) || defined(__EMX__) || defined(__CYGWIN__)
297 #define EAX_sig(context) ((context)->sc_eax)
298 #define EBX_sig(context) ((context)->sc_ebx)
299 #define ECX_sig(context) ((context)->sc_ecx)
300 #define EDX_sig(context) ((context)->sc_edx)
301 #define ESI_sig(context) ((context)->sc_esi)
302 #define EDI_sig(context) ((context)->sc_edi)
303 #define EBP_sig(context) ((context)->sc_ebp)
305 #define CS_sig(context) ((context)->sc_cs)
306 #define DS_sig(context) ((context)->sc_ds)
307 #define ES_sig(context) ((context)->sc_es)
308 #define FS_sig(context) ((context)->sc_fs)
309 #define GS_sig(context) ((context)->sc_gs)
310 #define SS_sig(context) ((context)->sc_ss)
312 #define TRAP_sig(context) ((context)->sc_trapno)
315 #define ERROR_sig(context) ((context)->sc_err)
319 #define CR2_sig(context) ((context)->cr2)
320 #define ERROR_sig(context) ((context)->sc_err)
321 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->i387))
325 #define EFL_sig(context) ((context)->sc_efl)
326 /* FreeBSD, see i386/i386/traps.c::trap_pfault va->err kludge */
327 #define CR2_sig(context) ((context)->sc_err)
329 #define EFL_sig(context) ((context)->sc_eflags)
332 #define EIP_sig(context) (*((unsigned long*)&(context)->sc_eip))
333 #define ESP_sig(context) (*((unsigned long*)&(context)->sc_esp))
335 #endif /* linux || __NetBSD__ || __FreeBSD__ || __OpenBSD__ */
337 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
343 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
344 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
345 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
346 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
347 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
348 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
349 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
351 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
352 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
353 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
354 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
356 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
357 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
359 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
361 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
363 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
365 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
368 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
371 #endif /* svr4 || SCO_DS */
374 /* exception code definitions (already defined by FreeBSD/NetBSD) */
375 #if !defined(__FreeBSD__) && !defined(__NetBSD__) /* FIXME: other BSDs? */
376 #define T_DIVIDE 0 /* Division by zero exception */
377 #define T_TRCTRAP 1 /* Single-step exception */
378 #define T_NMI 2 /* NMI interrupt */
379 #define T_BPTFLT 3 /* Breakpoint exception */
380 #define T_OFLOW 4 /* Overflow exception */
381 #define T_BOUND 5 /* Bound range exception */
382 #define T_PRIVINFLT 6 /* Invalid opcode exception */
383 #define T_DNA 7 /* Device not available exception */
384 #define T_DOUBLEFLT 8 /* Double fault exception */
385 #define T_FPOPFLT 9 /* Coprocessor segment overrun */
386 #define T_TSSFLT 10 /* Invalid TSS exception */
387 #define T_SEGNPFLT 11 /* Segment not present exception */
388 #define T_STKFLT 12 /* Stack fault */
389 #define T_PROTFLT 13 /* General protection fault */
390 #define T_PAGEFLT 14 /* Page fault */
391 #define T_RESERVED 15 /* Unknown exception */
392 #define T_ARITHTRAP 16 /* Floating point exception */
393 #define T_ALIGNFLT 17 /* Alignment check exception */
394 #define T_MCHK 18 /* Machine check exception */
395 #define T_CACHEFLT 19 /* Cache flush exception */
397 #if defined(__NetBSD__)
398 #define T_MCHK 19 /* Machine check exception */
401 #define T_UNKNOWN (-1) /* Unknown fault (TRAP_sig not defined) */
403 #include "wine/exception.h"
404 #include "stackframe.h"
407 #include "syslevel.h"
408 #include "wine/debug.h"
410 WINE_DEFAULT_DEBUG_CHANNEL(seh
);
412 typedef int (*wine_signal_handler
)(unsigned int sig
);
414 static wine_signal_handler handlers
[256];
416 extern void WINAPI
EXC_RtlRaiseException( PEXCEPTION_RECORD
, PCONTEXT
);
418 /***********************************************************************
421 inline static int dispatch_signal(unsigned int sig
)
423 if (handlers
[sig
] == NULL
) return 0;
424 return handlers
[sig
](sig
);
428 /***********************************************************************
431 * Get the trap code for a signal.
433 static inline int get_trap_code( const SIGCONTEXT
*sigcontext
)
436 return TRAP_sig(sigcontext
);
438 return T_UNKNOWN
; /* unknown trap code */
442 /***********************************************************************
445 * Get the error code for a signal.
447 static inline int get_error_code( const SIGCONTEXT
*sigcontext
)
450 return ERROR_sig(sigcontext
);
456 /***********************************************************************
459 * Get the CR2 value for a signal.
461 static inline void *get_cr2_value( const SIGCONTEXT
*sigcontext
)
464 return (void *)CR2_sig(sigcontext
);
472 /***********************************************************************
475 * Set the register values from a vm86 structure.
477 static void save_vm86_context( CONTEXT
*context
, const struct vm86plus_struct
*vm86
)
479 context
->Eax
= vm86
->regs
.eax
;
480 context
->Ebx
= vm86
->regs
.ebx
;
481 context
->Ecx
= vm86
->regs
.ecx
;
482 context
->Edx
= vm86
->regs
.edx
;
483 context
->Esi
= vm86
->regs
.esi
;
484 context
->Edi
= vm86
->regs
.edi
;
485 context
->Esp
= vm86
->regs
.esp
;
486 context
->Ebp
= vm86
->regs
.ebp
;
487 context
->Eip
= vm86
->regs
.eip
;
488 context
->SegCs
= vm86
->regs
.cs
;
489 context
->SegDs
= vm86
->regs
.ds
;
490 context
->SegEs
= vm86
->regs
.es
;
491 context
->SegFs
= vm86
->regs
.fs
;
492 context
->SegGs
= vm86
->regs
.gs
;
493 context
->SegSs
= vm86
->regs
.ss
;
494 context
->EFlags
= vm86
->regs
.eflags
;
498 /***********************************************************************
499 * restore_vm86_context
501 * Build a vm86 structure from the register values.
503 static void restore_vm86_context( const CONTEXT
*context
, struct vm86plus_struct
*vm86
)
505 vm86
->regs
.eax
= context
->Eax
;
506 vm86
->regs
.ebx
= context
->Ebx
;
507 vm86
->regs
.ecx
= context
->Ecx
;
508 vm86
->regs
.edx
= context
->Edx
;
509 vm86
->regs
.esi
= context
->Esi
;
510 vm86
->regs
.edi
= context
->Edi
;
511 vm86
->regs
.esp
= context
->Esp
;
512 vm86
->regs
.ebp
= context
->Ebp
;
513 vm86
->regs
.eip
= context
->Eip
;
514 vm86
->regs
.cs
= context
->SegCs
;
515 vm86
->regs
.ds
= context
->SegDs
;
516 vm86
->regs
.es
= context
->SegEs
;
517 vm86
->regs
.fs
= context
->SegFs
;
518 vm86
->regs
.gs
= context
->SegGs
;
519 vm86
->regs
.ss
= context
->SegSs
;
520 vm86
->regs
.eflags
= context
->EFlags
;
522 #endif /* __HAVE_VM86 */
525 /***********************************************************************
528 * Set the register values from a sigcontext.
530 static void save_context( CONTEXT
*context
, const SIGCONTEXT
*sigcontext
)
532 /* get %fs and %gs at time of the fault */
534 context
->SegFs
= LOWORD(FS_sig(sigcontext
));
536 context
->SegFs
= wine_get_fs();
539 context
->SegGs
= LOWORD(GS_sig(sigcontext
));
541 context
->SegGs
= wine_get_gs();
544 /* now restore a proper %fs for the fault handler */
545 if (!IS_SELECTOR_SYSTEM(CS_sig(sigcontext
)) ||
546 !IS_SELECTOR_SYSTEM(SS_sig(sigcontext
))) /* 16-bit mode */
549 * Win16 or DOS protected mode. Note that during switch
550 * from 16-bit mode to linear mode, CS may be set to system
551 * segment before FS is restored. Fortunately, in this case
552 * SS is still non-system segment. This is why both CS and SS
555 wine_set_fs( SYSLEVEL_Win16CurrentTeb
);
556 wine_set_gs( NtCurrentTeb()->gs_sel
);
559 else if ((void *)EIP_sig(sigcontext
) == vm86_return
) /* vm86 mode */
561 unsigned int *stack
= (unsigned int *)ESP_sig(sigcontext
);
563 /* fetch the saved %fs on the stack */
564 wine_set_fs( stack
[0] );
565 wine_set_gs( stack
[1] );
566 if (EAX_sig(sigcontext
) == VM86_EAX
) {
567 /* retrieve pointer to vm86plus struct that was stored in vm86_enter
568 * (but we could also get if from teb->vm86_ptr) */
569 struct vm86plus_struct
*vm86
= (struct vm86plus_struct
*)stack
[2];
570 /* get context from vm86 struct */
571 save_vm86_context( context
, vm86
);
575 #endif /* __HAVE_VM86 */
576 else /* 32-bit mode */
579 wine_set_fs( FS_sig(sigcontext
) );
582 wine_set_gs( GS_sig(sigcontext
) );
586 context
->Eax
= EAX_sig(sigcontext
);
587 context
->Ebx
= EBX_sig(sigcontext
);
588 context
->Ecx
= ECX_sig(sigcontext
);
589 context
->Edx
= EDX_sig(sigcontext
);
590 context
->Esi
= ESI_sig(sigcontext
);
591 context
->Edi
= EDI_sig(sigcontext
);
592 context
->Ebp
= EBP_sig(sigcontext
);
593 context
->EFlags
= EFL_sig(sigcontext
);
594 context
->Eip
= EIP_sig(sigcontext
);
595 context
->Esp
= ESP_sig(sigcontext
);
596 context
->SegCs
= LOWORD(CS_sig(sigcontext
));
597 context
->SegDs
= LOWORD(DS_sig(sigcontext
));
598 context
->SegEs
= LOWORD(ES_sig(sigcontext
));
599 context
->SegSs
= LOWORD(SS_sig(sigcontext
));
603 /***********************************************************************
606 * Build a sigcontext from the register values.
608 static void restore_context( const CONTEXT
*context
, SIGCONTEXT
*sigcontext
)
611 /* check if exception occurred in vm86 mode */
612 if ((void *)EIP_sig(sigcontext
) == vm86_return
&&
613 IS_SELECTOR_SYSTEM(CS_sig(sigcontext
)) &&
614 EAX_sig(sigcontext
) == VM86_EAX
)
616 unsigned int *stack
= (unsigned int *)ESP_sig(sigcontext
);
617 /* retrieve pointer to vm86plus struct that was stored in vm86_enter
618 * (but we could also get it from teb->vm86_ptr) */
619 struct vm86plus_struct
*vm86
= (struct vm86plus_struct
*)stack
[2];
620 restore_vm86_context( context
, vm86
);
623 #endif /* __HAVE_VM86 */
625 EAX_sig(sigcontext
) = context
->Eax
;
626 EBX_sig(sigcontext
) = context
->Ebx
;
627 ECX_sig(sigcontext
) = context
->Ecx
;
628 EDX_sig(sigcontext
) = context
->Edx
;
629 ESI_sig(sigcontext
) = context
->Esi
;
630 EDI_sig(sigcontext
) = context
->Edi
;
631 EBP_sig(sigcontext
) = context
->Ebp
;
632 EFL_sig(sigcontext
) = context
->EFlags
;
633 EIP_sig(sigcontext
) = context
->Eip
;
634 ESP_sig(sigcontext
) = context
->Esp
;
635 CS_sig(sigcontext
) = context
->SegCs
;
636 DS_sig(sigcontext
) = context
->SegDs
;
637 ES_sig(sigcontext
) = context
->SegEs
;
638 SS_sig(sigcontext
) = context
->SegSs
;
640 FS_sig(sigcontext
) = context
->SegFs
;
642 wine_set_fs( context
->SegFs
);
645 GS_sig(sigcontext
) = context
->SegGs
;
647 wine_set_gs( context
->SegGs
);
652 /***********************************************************************
655 * Handler initialization when the full context is not needed.
657 static void init_handler( const SIGCONTEXT
*sigcontext
)
659 /* restore a proper %fs for the fault handler */
660 if (!IS_SELECTOR_SYSTEM(CS_sig(sigcontext
)) ||
661 !IS_SELECTOR_SYSTEM(SS_sig(sigcontext
))) /* 16-bit mode */
663 wine_set_fs( SYSLEVEL_Win16CurrentTeb
);
664 wine_set_gs( NtCurrentTeb()->gs_sel
);
667 else if ((void *)EIP_sig(sigcontext
) == vm86_return
) /* vm86 mode */
669 /* fetch the saved %fs on the stack */
670 wine_set_fs( *(unsigned int *)ESP_sig(sigcontext
) );
671 wine_set_gs( NtCurrentTeb()->gs_sel
);
673 #endif /* __HAVE_VM86 */
674 else /* 32-bit mode, get %fs at time of the fault */
677 wine_set_fs( FS_sig(sigcontext
) );
680 wine_set_gs( GS_sig(sigcontext
) );
686 /***********************************************************************
689 * Set the FPU context from a sigcontext.
691 inline static void save_fpu( CONTEXT
*context
, const SIGCONTEXT
*sigcontext
)
694 if (FPU_sig(sigcontext
))
696 context
->FloatSave
= *FPU_sig(sigcontext
);
701 __asm__
__volatile__( "fnsave %0; fwait" : "=m" (context
->FloatSave
) );
702 #endif /* __GNUC__ */
706 /***********************************************************************
709 * Restore the FPU context to a sigcontext.
711 inline static void restore_fpu( CONTEXT
*context
, const SIGCONTEXT
*sigcontext
)
713 /* reset the current interrupt status */
714 context
->FloatSave
.StatusWord
&= context
->FloatSave
.ControlWord
| 0xffffff80;
716 if (FPU_sig(sigcontext
))
718 *FPU_sig(sigcontext
) = context
->FloatSave
;
723 /* avoid nested exceptions */
724 __asm__
__volatile__( "frstor %0; fwait" : : "m" (context
->FloatSave
) );
725 #endif /* __GNUC__ */
729 /**********************************************************************
732 * Get the FPU exception code from the FPU status.
734 static inline DWORD
get_fpu_code( const CONTEXT
*context
)
736 DWORD status
= context
->FloatSave
.StatusWord
;
738 if (status
& 0x01) /* IE */
740 if (status
& 0x40) /* SF */
741 return EXCEPTION_FLT_STACK_CHECK
;
743 return EXCEPTION_FLT_INVALID_OPERATION
;
745 if (status
& 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND
; /* DE flag */
746 if (status
& 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO
; /* ZE flag */
747 if (status
& 0x08) return EXCEPTION_FLT_OVERFLOW
; /* OE flag */
748 if (status
& 0x10) return EXCEPTION_FLT_UNDERFLOW
; /* UE flag */
749 if (status
& 0x20) return EXCEPTION_FLT_INEXACT_RESULT
; /* PE flag */
750 return EXCEPTION_FLT_INVALID_OPERATION
; /* generic error */
754 /**********************************************************************
757 * Implementation of SIGSEGV handler.
759 static void do_segv( CONTEXT
*context
, int trap_code
, void *cr2
, int err_code
)
761 EXCEPTION_RECORD rec
;
762 DWORD page_fault_code
= EXCEPTION_ACCESS_VIOLATION
;
765 /* we want the page-fault case to be fast */
766 if (trap_code
== T_PAGEFLT
)
767 if (!(page_fault_code
= VIRTUAL_HandleFault( cr2
))) return;
770 rec
.ExceptionRecord
= NULL
;
771 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
772 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
773 rec
.NumberParameters
= 0;
777 case T_OFLOW
: /* Overflow exception */
778 rec
.ExceptionCode
= EXCEPTION_INT_OVERFLOW
;
780 case T_BOUND
: /* Bound range exception */
781 rec
.ExceptionCode
= EXCEPTION_ARRAY_BOUNDS_EXCEEDED
;
783 case T_PRIVINFLT
: /* Invalid opcode exception */
784 rec
.ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
786 case T_STKFLT
: /* Stack fault */
787 rec
.ExceptionCode
= EXCEPTION_STACK_OVERFLOW
;
789 case T_SEGNPFLT
: /* Segment not present exception */
790 case T_PROTFLT
: /* General protection fault */
791 case T_UNKNOWN
: /* Unknown fault code */
792 if (INSTR_EmulateInstruction( context
)) return;
793 rec
.ExceptionCode
= EXCEPTION_PRIV_INSTRUCTION
;
795 case T_PAGEFLT
: /* Page fault */
797 rec
.NumberParameters
= 2;
798 rec
.ExceptionInformation
[0] = (err_code
& 2) != 0;
799 rec
.ExceptionInformation
[1] = (DWORD
)cr2
;
801 rec
.ExceptionCode
= page_fault_code
;
803 case T_ALIGNFLT
: /* Alignment check exception */
804 /* FIXME: pass through exception handler first? */
805 if (context
->EFlags
& 0x00040000)
807 /* Disable AC flag, return */
808 context
->EFlags
&= ~0x00040000;
811 rec
.ExceptionCode
= EXCEPTION_DATATYPE_MISALIGNMENT
;
814 ERR( "Got unexpected trap %d\n", trap_code
);
816 case T_NMI
: /* NMI interrupt */
817 case T_DNA
: /* Device not available exception */
818 case T_DOUBLEFLT
: /* Double fault exception */
819 case T_TSSFLT
: /* Invalid TSS exception */
820 case T_RESERVED
: /* Unknown exception */
821 case T_MCHK
: /* Machine check exception */
823 case T_CACHEFLT
: /* Cache flush exception */
825 rec
.ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
828 EXC_RtlRaiseException( &rec
, context
);
832 /**********************************************************************
835 * Implementation of SIGTRAP handler.
837 static void do_trap( CONTEXT
*context
, int trap_code
)
839 EXCEPTION_RECORD rec
;
840 DWORD dr0
, dr1
, dr2
, dr3
, dr6
, dr7
;
842 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
843 rec
.ExceptionRecord
= NULL
;
844 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
845 rec
.NumberParameters
= 0;
849 case T_TRCTRAP
: /* Single-step exception */
850 rec
.ExceptionCode
= EXCEPTION_SINGLE_STEP
;
851 if (context
->EFlags
& 0x100)
853 context
->EFlags
&= ~0x100; /* clear single-step flag */
855 else /* hardware breakpoint, fetch the debug registers */
857 context
->ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
858 GetThreadContext(GetCurrentThread(), context
);
861 case T_BPTFLT
: /* Breakpoint exception */
862 rec
.ExceptionAddress
= (char *)rec
.ExceptionAddress
- 1; /* back up over the int3 instruction */
865 rec
.ExceptionCode
= EXCEPTION_BREAKPOINT
;
875 EXC_RtlRaiseException( &rec
, context
);
877 if (dr0
!= context
->Dr0
|| dr1
!= context
->Dr1
|| dr2
!= context
->Dr2
||
878 dr3
!= context
->Dr3
|| dr6
!= context
->Dr6
|| dr7
!= context
->Dr7
)
880 /* the debug registers have changed, set the new values */
881 context
->ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
882 SetThreadContext(GetCurrentThread(), context
);
887 /**********************************************************************
890 * Implementation of SIGFPE handler
892 static void do_fpe( CONTEXT
*context
, int trap_code
)
894 EXCEPTION_RECORD rec
;
898 case T_DIVIDE
: /* Division by zero exception */
899 rec
.ExceptionCode
= EXCEPTION_INT_DIVIDE_BY_ZERO
;
901 case T_FPOPFLT
: /* Coprocessor segment overrun */
902 rec
.ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
904 case T_ARITHTRAP
: /* Floating point exception */
905 case T_UNKNOWN
: /* Unknown fault code */
906 rec
.ExceptionCode
= get_fpu_code( context
);
909 ERR( "Got unexpected trap %d\n", trap_code
);
910 rec
.ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
913 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
914 rec
.ExceptionRecord
= NULL
;
915 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
916 rec
.NumberParameters
= 0;
917 EXC_RtlRaiseException( &rec
, context
);
922 /**********************************************************************
925 * Handler for SIGUSR2, which we use to set the vm86 pending flag.
927 static void set_vm86_pend( CONTEXT
*context
)
929 EXCEPTION_RECORD rec
;
930 TEB
*teb
= NtCurrentTeb();
931 struct vm86plus_struct
*vm86
= (struct vm86plus_struct
*)(teb
->vm86_ptr
);
933 rec
.ExceptionCode
= EXCEPTION_VM86_STI
;
934 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
935 rec
.ExceptionRecord
= NULL
;
936 rec
.NumberParameters
= 1;
937 rec
.ExceptionInformation
[0] = 0;
939 /* __wine_enter_vm86() merges the vm86_pending flag in safely */
940 teb
->vm86_pending
|= VIP_MASK
;
941 /* see if we were in VM86 mode */
942 if (context
->EFlags
& 0x00020000)
944 /* seems so, also set flag in signal context */
945 if (context
->EFlags
& VIP_MASK
) return;
946 context
->EFlags
|= VIP_MASK
;
947 vm86
->regs
.eflags
|= VIP_MASK
; /* no exception recursion */
948 if (context
->EFlags
& VIF_MASK
) {
949 /* VIF is set, throw exception */
950 teb
->vm86_pending
= 0;
951 teb
->vm86_ptr
= NULL
;
952 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
953 EXC_RtlRaiseException( &rec
, context
);
954 teb
->vm86_ptr
= vm86
;
959 /* not in VM86, but possibly setting up for it */
960 if (vm86
->regs
.eflags
& VIP_MASK
) return;
961 vm86
->regs
.eflags
|= VIP_MASK
;
962 if (((char*)context
->Eip
>= (char*)vm86_return
) &&
963 ((char*)context
->Eip
<= (char*)vm86_return_end
) &&
964 (VM86_TYPE(context
->Eax
) != VM86_SIGNAL
)) {
965 /* exiting from VM86, can't throw */
968 if (vm86
->regs
.eflags
& VIF_MASK
) {
969 /* VIF is set, throw exception */
971 teb
->vm86_pending
= 0;
972 teb
->vm86_ptr
= NULL
;
973 save_vm86_context( &vcontext
, vm86
);
974 rec
.ExceptionAddress
= (LPVOID
)vcontext
.Eip
;
975 EXC_RtlRaiseException( &rec
, &vcontext
);
976 teb
->vm86_ptr
= vm86
;
977 restore_vm86_context( &vcontext
, vm86
);
983 /**********************************************************************
986 * Handler for SIGUSR2.
987 * We use it to signal that the running __wine_enter_vm86() should
988 * immediately set VIP_MASK, causing pending events to be handled
989 * as early as possible.
991 static HANDLER_DEF(usr2_handler
)
995 save_context( &context
, HANDLER_CONTEXT
);
996 set_vm86_pend( &context
);
997 restore_context( &context
, HANDLER_CONTEXT
);
1001 /**********************************************************************
1004 * Handler for SIGALRM.
1005 * Increases the alarm counter and sets the vm86 pending flag.
1007 static HANDLER_DEF(alrm_handler
)
1011 save_context( &context
, HANDLER_CONTEXT
);
1012 NtCurrentTeb()->alarms
++;
1013 set_vm86_pend( &context
);
1014 restore_context( &context
, HANDLER_CONTEXT
);
1016 #endif /* __HAVE_VM86 */
1019 /**********************************************************************
1022 * Handler for SIGSEGV and related errors.
1024 static HANDLER_DEF(segv_handler
)
1027 save_context( &context
, HANDLER_CONTEXT
);
1028 do_segv( &context
, get_trap_code(HANDLER_CONTEXT
),
1029 get_cr2_value(HANDLER_CONTEXT
), get_error_code(HANDLER_CONTEXT
) );
1030 restore_context( &context
, HANDLER_CONTEXT
);
1034 /**********************************************************************
1037 * Handler for SIGTRAP.
1039 static HANDLER_DEF(trap_handler
)
1042 save_context( &context
, HANDLER_CONTEXT
);
1043 do_trap( &context
, get_trap_code(HANDLER_CONTEXT
) );
1044 restore_context( &context
, HANDLER_CONTEXT
);
1048 /**********************************************************************
1051 * Handler for SIGFPE.
1053 static HANDLER_DEF(fpe_handler
)
1056 save_fpu( &context
, HANDLER_CONTEXT
);
1057 save_context( &context
, HANDLER_CONTEXT
);
1058 do_fpe( &context
, get_trap_code(HANDLER_CONTEXT
) );
1059 restore_context( &context
, HANDLER_CONTEXT
);
1060 restore_fpu( &context
, HANDLER_CONTEXT
);
1064 /**********************************************************************
1067 * Handler for SIGINT.
1069 static HANDLER_DEF(int_handler
)
1071 init_handler( HANDLER_CONTEXT
);
1072 if (!dispatch_signal(SIGINT
))
1074 EXCEPTION_RECORD rec
;
1077 save_context( &context
, HANDLER_CONTEXT
);
1078 rec
.ExceptionCode
= CONTROL_C_EXIT
;
1079 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
1080 rec
.ExceptionRecord
= NULL
;
1081 rec
.ExceptionAddress
= (LPVOID
)context
.Eip
;
1082 rec
.NumberParameters
= 0;
1083 EXC_RtlRaiseException( &rec
, &context
);
1084 restore_context( &context
, HANDLER_CONTEXT
);
1088 /**********************************************************************
1091 * Handler for SIGABRT.
1093 static HANDLER_DEF(abrt_handler
)
1095 EXCEPTION_RECORD rec
;
1098 save_context( &context
, HANDLER_CONTEXT
);
1099 rec
.ExceptionCode
= EXCEPTION_WINE_ASSERTION
;
1100 rec
.ExceptionFlags
= EH_NONCONTINUABLE
;
1101 rec
.ExceptionRecord
= NULL
;
1102 rec
.ExceptionAddress
= (LPVOID
)context
.Eip
;
1103 rec
.NumberParameters
= 0;
1104 EXC_RtlRaiseException( &rec
, &context
); /* Should never return.. */
1105 restore_context( &context
, HANDLER_CONTEXT
);
1109 /**********************************************************************
1112 * Handler for SIGTERM.
1114 static HANDLER_DEF(term_handler
)
1116 init_handler( HANDLER_CONTEXT
);
1117 SYSDEPS_AbortThread(0);
1121 /**********************************************************************
1124 * Handler for SIGUSR1, used to signal a thread that it got suspended.
1126 static HANDLER_DEF(usr1_handler
)
1128 init_handler( HANDLER_CONTEXT
);
1129 /* wait with 0 timeout, will only return once the thread is no longer suspended */
1130 WaitForMultipleObjectsEx( 0, NULL
, FALSE
, 0, FALSE
);
1134 /***********************************************************************
1137 * Set a signal handler
1139 static int set_handler( int sig
, int have_sigaltstack
, void (*func
)() )
1141 struct sigaction sig_act
;
1144 if (!have_sigaltstack
&& NtCurrentTeb()->signal_stack
)
1146 struct kernel_sigaction sig_act
;
1147 sig_act
.ksa_handler
= func
;
1148 sig_act
.ksa_flags
= SA_RESTART
;
1149 sig_act
.ksa_mask
= (1 << (SIGINT
-1)) |
1150 (1 << (SIGUSR2
-1)) |
1152 /* point to the top of the stack */
1153 sig_act
.ksa_restorer
= (char *)NtCurrentTeb()->signal_stack
+ SIGNAL_STACK_SIZE
;
1154 return wine_sigaction( sig
, &sig_act
, NULL
);
1157 sig_act
.sa_handler
= func
;
1158 sigemptyset( &sig_act
.sa_mask
);
1159 sigaddset( &sig_act
.sa_mask
, SIGINT
);
1160 sigaddset( &sig_act
.sa_mask
, SIGUSR2
);
1161 sigaddset( &sig_act
.sa_mask
, SIGALRM
);
1164 sig_act
.sa_flags
= SA_RESTART
;
1165 #elif defined (__svr4__) || defined(_SCO_DS)
1166 sig_act
.sa_flags
= SA_SIGINFO
| SA_RESTART
;
1168 sig_act
.sa_flags
= 0;
1172 if (have_sigaltstack
) sig_act
.sa_flags
|= SA_ONSTACK
;
1174 return sigaction( sig
, &sig_act
, NULL
);
1178 /***********************************************************************
1179 * __wine_set_signal_handler (NTDLL.@)
1181 int __wine_set_signal_handler(unsigned int sig
, wine_signal_handler wsh
)
1183 if (sig
> sizeof(handlers
) / sizeof(handlers
[0])) return -1;
1184 if (handlers
[sig
] != NULL
) return -2;
1185 handlers
[sig
] = wsh
;
1190 /**********************************************************************
1193 BOOL
SIGNAL_Init(void)
1195 int have_sigaltstack
= 0;
1197 #ifdef HAVE_SIGALTSTACK
1198 struct sigaltstack ss
;
1199 if ((ss
.ss_sp
= NtCurrentTeb()->signal_stack
))
1201 ss
.ss_size
= SIGNAL_STACK_SIZE
;
1203 if (!sigaltstack(&ss
, NULL
)) have_sigaltstack
= 1;
1205 /* sigaltstack may fail because the kernel is too old, or
1206 because glibc is brain-dead. In the latter case a
1207 direct system call should succeed. */
1208 else if (!wine_sigaltstack(&ss
, NULL
)) have_sigaltstack
= 1;
1211 #endif /* HAVE_SIGALTSTACK */
1213 if (set_handler( SIGINT
, have_sigaltstack
, (void (*)())int_handler
) == -1) goto error
;
1214 if (set_handler( SIGFPE
, have_sigaltstack
, (void (*)())fpe_handler
) == -1) goto error
;
1215 if (set_handler( SIGSEGV
, have_sigaltstack
, (void (*)())segv_handler
) == -1) goto error
;
1216 if (set_handler( SIGILL
, have_sigaltstack
, (void (*)())segv_handler
) == -1) goto error
;
1217 if (set_handler( SIGABRT
, have_sigaltstack
, (void (*)())abrt_handler
) == -1) goto error
;
1218 if (set_handler( SIGTERM
, have_sigaltstack
, (void (*)())term_handler
) == -1) goto error
;
1219 if (set_handler( SIGUSR1
, have_sigaltstack
, (void (*)())usr1_handler
) == -1) goto error
;
1221 if (set_handler( SIGBUS
, have_sigaltstack
, (void (*)())segv_handler
) == -1) goto error
;
1224 if (set_handler( SIGTRAP
, have_sigaltstack
, (void (*)())trap_handler
) == -1) goto error
;
1228 if (set_handler( SIGALRM
, have_sigaltstack
, (void (*)())alrm_handler
) == -1) goto error
;
1229 if (set_handler( SIGUSR2
, have_sigaltstack
, (void (*)())usr2_handler
) == -1) goto error
;
1235 perror("sigaction");
1240 /**********************************************************************
1243 * Block the async signals.
1245 void SIGNAL_Block(void)
1249 sigemptyset( &block_set
);
1250 sigaddset( &block_set
, SIGALRM
);
1251 sigaddset( &block_set
, SIGIO
);
1252 sigaddset( &block_set
, SIGHUP
);
1253 sigaddset( &block_set
, SIGUSR1
);
1254 sigaddset( &block_set
, SIGUSR2
);
1255 sigprocmask( SIG_BLOCK
, &block_set
, NULL
);
1259 /***********************************************************************
1262 * Unblock signals. Called from EXC_RtlRaiseException.
1264 void SIGNAL_Unblock(void)
1268 sigfillset( &all_sigs
);
1269 sigprocmask( SIG_UNBLOCK
, &all_sigs
, NULL
);
1273 /**********************************************************************
1276 * Restore the default handlers.
1278 void SIGNAL_Reset(void)
1280 signal( SIGINT
, SIG_DFL
);
1281 signal( SIGFPE
, SIG_DFL
);
1282 signal( SIGSEGV
, SIG_DFL
);
1283 signal( SIGILL
, SIG_DFL
);
1284 signal( SIGABRT
, SIG_DFL
);
1285 signal( SIGTERM
, SIG_DFL
);
1287 signal( SIGBUS
, SIG_DFL
);
1290 signal( SIGTRAP
, SIG_DFL
);
1296 /**********************************************************************
1297 * __wine_enter_vm86 (NTDLL.@)
1299 * Enter vm86 mode with the specified register context.
1301 void __wine_enter_vm86( CONTEXT
*context
)
1303 EXCEPTION_RECORD rec
;
1304 TEB
*teb
= NtCurrentTeb();
1306 struct vm86plus_struct vm86
;
1308 memset( &vm86
, 0, sizeof(vm86
) );
1311 restore_vm86_context( context
, &vm86
);
1312 /* Linux doesn't preserve pending flag (VIP_MASK) on return,
1313 * so save it on entry, just in case */
1314 teb
->vm86_pending
|= (context
->EFlags
& VIP_MASK
);
1315 /* Work around race conditions with signal handler
1316 * (avoiding sigprocmask for performance reasons) */
1317 teb
->vm86_ptr
= &vm86
;
1318 vm86
.regs
.eflags
|= teb
->vm86_pending
;
1319 /* Check for VIF|VIP here, since vm86_enter doesn't */
1320 if ((vm86
.regs
.eflags
& (VIF_MASK
|VIP_MASK
)) == (VIF_MASK
|VIP_MASK
)) {
1321 teb
->vm86_ptr
= NULL
;
1322 teb
->vm86_pending
= 0;
1323 context
->EFlags
|= VIP_MASK
;
1324 rec
.ExceptionCode
= EXCEPTION_VM86_STI
;
1325 rec
.ExceptionInformation
[0] = 0;
1331 res
= vm86_enter( &teb
->vm86_ptr
); /* uses and clears teb->vm86_ptr */
1337 } while (VM86_TYPE(res
) == VM86_SIGNAL
);
1339 save_vm86_context( context
, &vm86
);
1340 context
->EFlags
|= teb
->vm86_pending
;
1342 switch(VM86_TYPE(res
))
1344 case VM86_UNKNOWN
: /* unhandled GP fault - IO-instruction or similar */
1345 do_segv( context
, T_PROTFLT
, 0, 0 );
1347 case VM86_TRAP
: /* return due to DOS-debugger request */
1348 do_trap( context
, VM86_ARG(res
) );
1350 case VM86_INTx
: /* int3/int x instruction (ARG = x) */
1351 rec
.ExceptionCode
= EXCEPTION_VM86_INTx
;
1353 case VM86_STI
: /* sti/popf/iret instruction enabled virtual interrupts */
1354 teb
->vm86_pending
= 0;
1355 rec
.ExceptionCode
= EXCEPTION_VM86_STI
;
1357 case VM86_PICRETURN
: /* return due to pending PIC request */
1358 rec
.ExceptionCode
= EXCEPTION_VM86_PICRETURN
;
1361 ERR( "unhandled result from vm86 mode %x\n", res
);
1364 rec
.ExceptionInformation
[0] = VM86_ARG(res
);
1366 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
1367 rec
.ExceptionRecord
= NULL
;
1368 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
1369 rec
.NumberParameters
= 1;
1370 EXC_RtlRaiseException( &rec
, context
);
1374 #else /* __HAVE_VM86 */
1375 /**********************************************************************
1376 * __wine_enter_vm86 (NTDLL.@)
1378 void __wine_enter_vm86( CONTEXT
*context
)
1380 MESSAGE("vm86 mode not supported on this platform\n");
1382 #endif /* __HAVE_VM86 */
1384 /**********************************************************************
1385 * DbgBreakPoint (NTDLL.@)
1387 __ASM_GLOBAL_FUNC( DbgBreakPoint
, "int $3; ret");
1389 /**********************************************************************
1390 * DbgUserBreakPoint (NTDLL.@)
1392 __ASM_GLOBAL_FUNC( DbgUserBreakPoint
, "int $3; ret");
1394 #endif /* __i386__ */