2 * i386 signal handling routines
4 * Copyright 1999 Alexandre Julliard
17 #ifdef HAVE_SYS_PARAM_H
18 # include <sys/param.h>
23 # ifdef HAVE_SYS_SYSCALL_H
24 # include <sys/syscall.h>
28 #ifdef HAVE_SYS_VM86_H
29 # include <sys/vm86.h>
32 #include "selectors.h"
34 /***********************************************************************
35 * signal context platform-specific definitions
41 unsigned short sc_gs
, __gsh
;
42 unsigned short sc_fs
, __fsh
;
43 unsigned short sc_es
, __esh
;
44 unsigned short sc_ds
, __dsh
;
53 unsigned long sc_trapno
;
56 unsigned short sc_cs
, __csh
;
57 unsigned long sc_eflags
;
58 unsigned long esp_at_signal
;
59 unsigned short sc_ss
, __ssh
;
61 unsigned long oldmask
;
65 #define HANDLER_DEF(name) void name( int __signal, SIGCONTEXT __context )
66 #define HANDLER_CONTEXT (&__context)
68 /* this is the sigaction structure from the Linux 2.1.20 kernel. */
69 struct kernel_sigaction
71 void (*ksa_handler
)();
72 unsigned long ksa_mask
;
73 unsigned long ksa_flags
;
77 /* Similar to the sigaction function in libc, except it leaves alone the
78 restorer field, which is used to specify the signal stack address */
79 static inline int wine_sigaction( int sig
, struct kernel_sigaction
*new,
80 struct kernel_sigaction
*old
)
82 __asm__
__volatile__( "pushl %%ebx\n\t"
87 : "0" (SYS_sigaction
), "r" (sig
), "c" (new), "d" (old
) );
93 #ifdef HAVE_SIGALTSTACK
94 /* direct syscall for sigaltstack to work around glibc 2.0 brain-damage */
95 static inline int wine_sigaltstack( const struct sigaltstack
*new,
96 struct sigaltstack
*old
)
99 __asm__
__volatile__( "pushl %%ebx\n\t"
104 : "0" (SYS_sigaltstack
), "r" (new), "c" (old
) );
105 if (ret
>= 0) return 0;
111 static inline int wine_vm86plus( int func
, struct vm86plus_struct
*ptr
)
114 __asm__
__volatile__( "pushl %%fs\n\t"
121 : "0" (166 /*SYS_vm86*/), "g" (func
), "c" (ptr
) );
122 if (res
>= 0) return res
;
131 #define EAX_sig(context) ((context)->tf_eax)
132 #define EBX_sig(context) ((context)->tf_ebx)
133 #define ECX_sig(context) ((context)->tf_ecx)
134 #define EDX_sig(context) ((context)->tf_edx)
135 #define ESI_sig(context) ((context)->tf_esi)
136 #define EDI_sig(context) ((context)->tf_edi)
137 #define EBP_sig(context) ((context)->tf_ebp)
139 #define CS_sig(context) ((context)->tf_cs)
140 #define DS_sig(context) ((context)->tf_ds)
141 #define ES_sig(context) ((context)->tf_es)
142 #define SS_sig(context) ((context)->tf_ss)
144 #include <machine/frame.h>
145 typedef struct trapframe SIGCONTEXT
;
147 #define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
148 #define HANDLER_CONTEXT __context
150 #define EFL_sig(context) ((context)->tf_eflags)
152 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
153 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
157 #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
159 typedef struct sigcontext SIGCONTEXT
;
161 #define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
162 #define HANDLER_CONTEXT __context
166 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
169 #include <sys/regset.h>
173 #include <sys/ucontext.h>
175 typedef struct ucontext SIGCONTEXT
;
177 #define HANDLER_DEF(name) void name( int __signal, void *__siginfo, SIGCONTEXT *__context )
178 #define HANDLER_CONTEXT __context
180 #endif /* svr4 || SCO_DS */
186 unsigned long ContextFlags
;
187 FLOATING_SAVE_AREA sc_float
;
192 unsigned long sc_edi
;
193 unsigned long sc_esi
;
194 unsigned long sc_eax
;
195 unsigned long sc_ebx
;
196 unsigned long sc_ecx
;
197 unsigned long sc_edx
;
198 unsigned long sc_ebp
;
199 unsigned long sc_eip
;
201 unsigned long sc_eflags
;
202 unsigned long sc_esp
;
209 #if defined(linux) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__EMX__)
211 #define EAX_sig(context) ((context)->sc_eax)
212 #define EBX_sig(context) ((context)->sc_ebx)
213 #define ECX_sig(context) ((context)->sc_ecx)
214 #define EDX_sig(context) ((context)->sc_edx)
215 #define ESI_sig(context) ((context)->sc_esi)
216 #define EDI_sig(context) ((context)->sc_edi)
217 #define EBP_sig(context) ((context)->sc_ebp)
219 #define CS_sig(context) ((context)->sc_cs)
220 #define DS_sig(context) ((context)->sc_ds)
221 #define ES_sig(context) ((context)->sc_es)
222 #define SS_sig(context) ((context)->sc_ss)
224 /* FS and GS are now in the sigcontext struct of FreeBSD, but not
225 * saved by the exception handling. duh.
226 * Actually they are in -current (have been for a while), and that
227 * patch now finally has been MFC'd to -stable too (Nov 15 1999).
228 * If you're running a system from the -stable branch older than that,
229 * like a 3.3-RELEASE, grab the patch from the ports tree:
230 * ftp://ftp.freebsd.org/pub/FreeBSD/FreeBSD-current/ports/emulators/wine/files/patch-3.3-sys-fsgs
231 * (If its not yet there when you look, go here:
232 * http://www.jelal.kn-bremen.de/freebsd/ports/emulators/wine/files/ )
235 #define FS_sig(context) ((context)->sc_fs)
236 #define GS_sig(context) ((context)->sc_gs)
240 #define FS_sig(context) ((context)->sc_fs)
241 #define GS_sig(context) ((context)->sc_gs)
242 #define CR2_sig(context) ((context)->cr2)
243 #define TRAP_sig(context) ((context)->sc_trapno)
244 #define ERROR_sig(context) ((context)->sc_err)
245 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->i387))
249 #define EFL_sig(context) ((context)->sc_eflags)
251 #define EFL_sig(context) ((context)->sc_efl)
252 /* FreeBSD, see i386/i386/traps.c::trap_pfault va->err kludge */
253 #define CR2_sig(context) ((context)->sc_err)
254 #define TRAP_sig(context) ((context)->sc_trapno)
257 #define EIP_sig(context) (*((unsigned long*)&(context)->sc_eip))
258 #define ESP_sig(context) (*((unsigned long*)&(context)->sc_esp))
260 #endif /* linux || __NetBSD__ || __FreeBSD__ || __OpenBSD__ */
262 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
268 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
269 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
270 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
271 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
272 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
273 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
274 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
276 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
277 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
278 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
279 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
281 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
282 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
284 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
286 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
288 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
290 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
293 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
296 #endif /* svr4 || SCO_DS */
299 /* exception code definitions (already defined by FreeBSD) */
300 #ifndef __FreeBSD__ /* FIXME: other BSDs? */
301 #define T_DIVIDE 0 /* Division by zero exception */
302 #define T_TRCTRAP 1 /* Single-step exception */
303 #define T_NMI 2 /* NMI interrupt */
304 #define T_BPTFLT 3 /* Breakpoint exception */
305 #define T_OFLOW 4 /* Overflow exception */
306 #define T_BOUND 5 /* Bound range exception */
307 #define T_PRIVINFLT 6 /* Invalid opcode exception */
308 #define T_DNA 7 /* Device not available exception */
309 #define T_DOUBLEFLT 8 /* Double fault exception */
310 #define T_FPOPFLT 9 /* Coprocessor segment overrun */
311 #define T_TSSFLT 10 /* Invalid TSS exception */
312 #define T_SEGNPFLT 11 /* Segment not present exception */
313 #define T_STKFLT 12 /* Stack fault */
314 #define T_PROTFLT 13 /* General protection fault */
315 #define T_PAGEFLT 14 /* Page fault */
316 #define T_RESERVED 15 /* Unknown exception */
317 #define T_ARITHTRAP 16 /* Floating point exception */
318 #define T_ALIGNFLT 17 /* Alignment check exception */
319 #define T_MCHK 18 /* Machine check exception */
320 #define T_CACHEFLT 19 /* Cache flush exception */
323 #define T_UNKNOWN (-1) /* Unknown fault (TRAP_sig not defined) */
325 #include "wine/exception.h"
327 #include "stackframe.h"
331 #include "syslevel.h"
332 #include "debugtools.h"
334 DEFAULT_DEBUG_CHANNEL(seh
)
338 /***********************************************************************
341 * Initialization code for a signal handler.
342 * Restores the proper %fs value for the current thread.
344 static inline void handler_init( CONTEXT
*context
, const SIGCONTEXT
*sigcontext
)
347 /* get %fs at time of the fault */
349 fs
= FS_sig(sigcontext
);
354 /* now restore a proper %fs for the fault handler */
355 if ((EFL_sig(sigcontext
) & 0x00020000) || /* vm86 mode */
356 !IS_SELECTOR_SYSTEM(CS_sig(sigcontext
))) /* 16-bit mode */
357 fs
= SYSLEVEL_Win16CurrentTeb
;
358 if (!fs
) fs
= SYSLEVEL_EmergencyTeb
;
362 /***********************************************************************
365 * Get the trap code for a signal.
367 static inline int get_trap_code( const SIGCONTEXT
*sigcontext
)
370 return TRAP_sig(sigcontext
);
372 return T_UNKNOWN
; /* unknown trap code */
376 /***********************************************************************
379 * Get the error code for a signal.
381 static inline int get_error_code( const SIGCONTEXT
*sigcontext
)
384 return ERROR_sig(sigcontext
);
390 /***********************************************************************
393 * Get the CR2 value for a signal.
395 static inline void *get_cr2_value( const SIGCONTEXT
*sigcontext
)
398 return (void *)CR2_sig(sigcontext
);
404 /***********************************************************************
407 * Set the register values from a sigcontext.
409 static void save_context( CONTEXT
*context
, const SIGCONTEXT
*sigcontext
)
411 context
->Eax
= EAX_sig(sigcontext
);
412 context
->Ebx
= EBX_sig(sigcontext
);
413 context
->Ecx
= ECX_sig(sigcontext
);
414 context
->Edx
= EDX_sig(sigcontext
);
415 context
->Esi
= ESI_sig(sigcontext
);
416 context
->Edi
= EDI_sig(sigcontext
);
417 context
->Ebp
= EBP_sig(sigcontext
);
418 context
->EFlags
= EFL_sig(sigcontext
);
419 context
->Eip
= EIP_sig(sigcontext
);
420 context
->Esp
= ESP_sig(sigcontext
);
421 context
->SegCs
= LOWORD(CS_sig(sigcontext
));
422 context
->SegDs
= LOWORD(DS_sig(sigcontext
));
423 context
->SegEs
= LOWORD(ES_sig(sigcontext
));
424 context
->SegSs
= LOWORD(SS_sig(sigcontext
));
425 /* %fs already handled in handler_init */
427 context
->SegGs
= LOWORD(GS_sig(sigcontext
));
429 context
->SegGs
= __get_gs();
434 /***********************************************************************
437 * Build a sigcontext from the register values.
439 static void restore_context( const CONTEXT
*context
, SIGCONTEXT
*sigcontext
)
441 EAX_sig(sigcontext
) = context
->Eax
;
442 EBX_sig(sigcontext
) = context
->Ebx
;
443 ECX_sig(sigcontext
) = context
->Ecx
;
444 EDX_sig(sigcontext
) = context
->Edx
;
445 ESI_sig(sigcontext
) = context
->Esi
;
446 EDI_sig(sigcontext
) = context
->Edi
;
447 EBP_sig(sigcontext
) = context
->Ebp
;
448 EFL_sig(sigcontext
) = context
->EFlags
;
449 EIP_sig(sigcontext
) = context
->Eip
;
450 ESP_sig(sigcontext
) = context
->Esp
;
451 CS_sig(sigcontext
) = context
->SegCs
;
452 DS_sig(sigcontext
) = context
->SegDs
;
453 ES_sig(sigcontext
) = context
->SegEs
;
454 SS_sig(sigcontext
) = context
->SegSs
;
456 FS_sig(sigcontext
) = context
->SegFs
;
458 __set_fs( context
->SegFs
);
461 GS_sig(sigcontext
) = context
->SegGs
;
463 __set_gs( context
->SegGs
);
468 /***********************************************************************
471 * Set the FPU context from a sigcontext.
473 static void inline save_fpu( CONTEXT
*context
, const SIGCONTEXT
*sigcontext
)
476 if (FPU_sig(sigcontext
))
478 context
->FloatSave
= *FPU_sig(sigcontext
);
483 __asm__
__volatile__( "fnsave %0; fwait" : "=m" (context
->FloatSave
) );
484 #endif /* __GNUC__ */
488 /***********************************************************************
491 * Restore the FPU context to a sigcontext.
493 static void inline restore_fpu( CONTEXT
*context
, const SIGCONTEXT
*sigcontext
)
495 /* reset the current interrupt status */
496 context
->FloatSave
.StatusWord
&= context
->FloatSave
.ControlWord
| 0xffffff80;
498 if (FPU_sig(sigcontext
))
500 *FPU_sig(sigcontext
) = context
->FloatSave
;
505 /* avoid nested exceptions */
506 __asm__
__volatile__( "frstor %0; fwait" : : "m" (context
->FloatSave
) );
507 #endif /* __GNUC__ */
511 /**********************************************************************
514 * Get the FPU exception code from the FPU status.
516 static inline DWORD
get_fpu_code( const CONTEXT
*context
)
518 DWORD status
= context
->FloatSave
.StatusWord
;
520 if (status
& 0x01) /* IE */
522 if (status
& 0x40) /* SF */
523 return EXCEPTION_FLT_STACK_CHECK
;
525 return EXCEPTION_FLT_INVALID_OPERATION
;
527 if (status
& 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND
; /* DE flag */
528 if (status
& 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO
; /* ZE flag */
529 if (status
& 0x08) return EXCEPTION_FLT_OVERFLOW
; /* OE flag */
530 if (status
& 0x10) return EXCEPTION_FLT_UNDERFLOW
; /* UE flag */
531 if (status
& 0x20) return EXCEPTION_FLT_INEXACT_RESULT
; /* PE flag */
532 return EXCEPTION_FLT_INVALID_OPERATION
; /* generic error */
536 /**********************************************************************
539 * Implementation of SIGSEGV handler.
541 static void do_segv( CONTEXT
*context
, int trap_code
, void *cr2
, int err_code
)
543 EXCEPTION_RECORD rec
;
544 DWORD page_fault_code
= EXCEPTION_ACCESS_VIOLATION
;
547 /* we want the page-fault case to be fast */
548 if (trap_code
== T_PAGEFLT
)
549 if (!(page_fault_code
= VIRTUAL_HandleFault( cr2
))) return;
552 rec
.ExceptionRecord
= NULL
;
553 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
554 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
555 rec
.NumberParameters
= 0;
559 case T_OFLOW
: /* Overflow exception */
560 rec
.ExceptionCode
= EXCEPTION_INT_OVERFLOW
;
562 case T_BOUND
: /* Bound range exception */
563 rec
.ExceptionCode
= EXCEPTION_ARRAY_BOUNDS_EXCEEDED
;
565 case T_PRIVINFLT
: /* Invalid opcode exception */
566 rec
.ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
568 case T_STKFLT
: /* Stack fault */
569 rec
.ExceptionCode
= EXCEPTION_STACK_OVERFLOW
;
571 case T_SEGNPFLT
: /* Segment not present exception */
572 case T_PROTFLT
: /* General protection fault */
573 case T_UNKNOWN
: /* Unknown fault code */
574 if (INSTR_EmulateInstruction( context
)) return;
575 rec
.ExceptionCode
= EXCEPTION_PRIV_INSTRUCTION
;
577 case T_PAGEFLT
: /* Page fault */
579 rec
.NumberParameters
= 2;
580 rec
.ExceptionInformation
[0] = (err_code
& 2) != 0;
581 rec
.ExceptionInformation
[0] = 0;
582 rec
.ExceptionInformation
[1] = (DWORD
)cr2
;
584 rec
.ExceptionCode
= page_fault_code
;
586 case T_ALIGNFLT
: /* Alignment check exception */
587 /* FIXME: pass through exception handler first? */
588 if (context
->EFlags
& 0x00040000)
590 /* Disable AC flag, return */
591 context
->EFlags
&= ~0x00040000;
594 rec
.ExceptionCode
= EXCEPTION_DATATYPE_MISALIGNMENT
;
597 ERR( "Got unexpected trap %d\n", trap_code
);
599 case T_NMI
: /* NMI interrupt */
600 case T_DNA
: /* Device not available exception */
601 case T_DOUBLEFLT
: /* Double fault exception */
602 case T_TSSFLT
: /* Invalid TSS exception */
603 case T_RESERVED
: /* Unknown exception */
604 case T_MCHK
: /* Machine check exception */
606 case T_CACHEFLT
: /* Cache flush exception */
608 rec
.ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
611 EXC_RtlRaiseException( &rec
, context
);
615 /**********************************************************************
618 * Implementation of SIGTRAP handler.
620 static void do_trap( CONTEXT
*context
, int trap_code
)
622 EXCEPTION_RECORD rec
;
624 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
625 rec
.ExceptionRecord
= NULL
;
626 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
627 rec
.NumberParameters
= 0;
631 case T_TRCTRAP
: /* Single-step exception */
632 rec
.ExceptionCode
= EXCEPTION_SINGLE_STEP
;
633 context
->EFlags
&= ~0x100; /* clear single-step flag */
635 case T_BPTFLT
: /* Breakpoint exception */
636 rec
.ExceptionAddress
= (char *)rec
.ExceptionAddress
- 1; /* back up over the int3 instruction */
639 rec
.ExceptionCode
= EXCEPTION_BREAKPOINT
;
642 EXC_RtlRaiseException( &rec
, context
);
646 /**********************************************************************
649 * Implementation of SIGFPE handler
651 static void do_fpe( CONTEXT
*context
, int trap_code
)
653 EXCEPTION_RECORD rec
;
657 case T_DIVIDE
: /* Division by zero exception */
658 rec
.ExceptionCode
= EXCEPTION_INT_DIVIDE_BY_ZERO
;
660 case T_FPOPFLT
: /* Coprocessor segment overrun */
661 rec
.ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
663 case T_ARITHTRAP
: /* Floating point exception */
664 case T_UNKNOWN
: /* Unknown fault code */
665 rec
.ExceptionCode
= get_fpu_code( context
);
668 ERR( "Got unexpected trap %d\n", trap_code
);
669 rec
.ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
672 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
673 rec
.ExceptionRecord
= NULL
;
674 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
675 rec
.NumberParameters
= 0;
676 EXC_RtlRaiseException( &rec
, context
);
680 /**********************************************************************
683 * Handler for SIGSEGV and related errors.
685 static HANDLER_DEF(segv_handler
)
688 handler_init( &context
, HANDLER_CONTEXT
);
689 save_context( &context
, HANDLER_CONTEXT
);
690 do_segv( &context
, get_trap_code(HANDLER_CONTEXT
),
691 get_cr2_value(HANDLER_CONTEXT
), get_error_code(HANDLER_CONTEXT
) );
692 restore_context( &context
, HANDLER_CONTEXT
);
696 /**********************************************************************
699 * Handler for SIGTRAP.
701 static HANDLER_DEF(trap_handler
)
704 handler_init( &context
, HANDLER_CONTEXT
);
705 save_context( &context
, HANDLER_CONTEXT
);
706 do_trap( &context
, get_trap_code(HANDLER_CONTEXT
) );
707 restore_context( &context
, HANDLER_CONTEXT
);
711 /**********************************************************************
714 * Handler for SIGFPE.
716 static HANDLER_DEF(fpe_handler
)
719 handler_init( &context
, HANDLER_CONTEXT
);
720 save_fpu( &context
, HANDLER_CONTEXT
);
721 save_context( &context
, HANDLER_CONTEXT
);
722 do_fpe( &context
, get_trap_code(HANDLER_CONTEXT
) );
723 restore_context( &context
, HANDLER_CONTEXT
);
724 restore_fpu( &context
, HANDLER_CONTEXT
);
728 /**********************************************************************
731 * Handler for SIGINT.
733 static HANDLER_DEF(int_handler
)
735 EXCEPTION_RECORD rec
;
738 handler_init( &context
, HANDLER_CONTEXT
);
739 save_context( &context
, HANDLER_CONTEXT
);
740 rec
.ExceptionCode
= CONTROL_C_EXIT
;
741 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
742 rec
.ExceptionRecord
= NULL
;
743 rec
.ExceptionAddress
= (LPVOID
)context
.Eip
;
744 rec
.NumberParameters
= 0;
745 EXC_RtlRaiseException( &rec
, &context
);
746 restore_context( &context
, HANDLER_CONTEXT
);
750 /***********************************************************************
753 * Set a signal handler
755 static int set_handler( int sig
, int have_sigaltstack
, void (*func
)() )
757 struct sigaction sig_act
;
760 if (!have_sigaltstack
&& NtCurrentTeb()->signal_stack
)
762 struct kernel_sigaction sig_act
;
763 sig_act
.ksa_handler
= func
;
764 sig_act
.ksa_flags
= SA_RESTART
| SA_NOMASK
;
765 sig_act
.ksa_mask
= 0;
766 /* point to the top of the stack */
767 sig_act
.ksa_restorer
= (char *)NtCurrentTeb()->signal_stack
+ SIGNAL_STACK_SIZE
;
768 return wine_sigaction( sig
, &sig_act
, NULL
);
771 sig_act
.sa_handler
= func
;
772 sigemptyset( &sig_act
.sa_mask
);
775 sig_act
.sa_flags
= SA_RESTART
| SA_NOMASK
;
776 #elif defined (__svr4__) || defined(_SCO_DS)
777 sig_act
.sa_flags
= SA_SIGINFO
| SA_RESTART
;
779 sig_act
.sa_flags
= 0;
783 if (have_sigaltstack
) sig_act
.sa_flags
|= SA_ONSTACK
;
785 return sigaction( sig
, &sig_act
, NULL
);
789 /**********************************************************************
792 BOOL
SIGNAL_Init(void)
794 int have_sigaltstack
= 0;
796 #ifdef HAVE_SIGALTSTACK
797 struct sigaltstack ss
;
798 if ((ss
.ss_sp
= NtCurrentTeb()->signal_stack
))
800 ss
.ss_size
= SIGNAL_STACK_SIZE
;
802 if (!sigaltstack(&ss
, NULL
)) have_sigaltstack
= 1;
804 /* sigaltstack may fail because the kernel is too old, or
805 because glibc is brain-dead. In the latter case a
806 direct system call should succeed. */
807 else if (!wine_sigaltstack(&ss
, NULL
)) have_sigaltstack
= 1;
810 #endif /* HAVE_SIGALTSTACK */
812 /* automatic child reaping to avoid zombies */
813 signal( SIGCHLD
, SIG_IGN
);
815 if (set_handler( SIGINT
, have_sigaltstack
, (void (*)())int_handler
) == -1) goto error
;
816 if (set_handler( SIGFPE
, have_sigaltstack
, (void (*)())fpe_handler
) == -1) goto error
;
817 if (set_handler( SIGSEGV
, have_sigaltstack
, (void (*)())segv_handler
) == -1) goto error
;
818 if (set_handler( SIGILL
, have_sigaltstack
, (void (*)())segv_handler
) == -1) goto error
;
820 if (set_handler( SIGBUS
, have_sigaltstack
, (void (*)())segv_handler
) == -1) goto error
;
823 if (set_handler( SIGTRAP
, have_sigaltstack
, (void (*)())trap_handler
) == -1) goto error
;
834 /**********************************************************************
837 * Enter vm86 mode with the specified register context.
839 void __wine_enter_vm86( CONTEXT
*context
)
841 EXCEPTION_RECORD rec
;
843 struct vm86plus_struct vm86
;
847 vm86
.regs
.eax
= context
->Eax
;
848 vm86
.regs
.ebx
= context
->Ebx
;
849 vm86
.regs
.ecx
= context
->Ecx
;
850 vm86
.regs
.edx
= context
->Edx
;
851 vm86
.regs
.esi
= context
->Esi
;
852 vm86
.regs
.edi
= context
->Edi
;
853 vm86
.regs
.esp
= context
->Esp
;
854 vm86
.regs
.ebp
= context
->Ebp
;
855 vm86
.regs
.eip
= context
->Eip
;
856 vm86
.regs
.cs
= context
->SegCs
;
857 vm86
.regs
.ds
= context
->SegDs
;
858 vm86
.regs
.es
= context
->SegEs
;
859 vm86
.regs
.fs
= context
->SegFs
;
860 vm86
.regs
.gs
= context
->SegGs
;
861 vm86
.regs
.eflags
= context
->EFlags
;
862 if (vm86
.regs
.eflags
& IF_MASK
) vm86
.regs
.eflags
|= VIF_MASK
;
864 res
= wine_vm86plus( VM86_ENTER
, &vm86
);
866 context
->Eax
= vm86
.regs
.eax
;
867 context
->Ebx
= vm86
.regs
.ebx
;
868 context
->Ecx
= vm86
.regs
.ecx
;
869 context
->Edx
= vm86
.regs
.edx
;
870 context
->Esi
= vm86
.regs
.esi
;
871 context
->Edi
= vm86
.regs
.edi
;
872 context
->Esp
= vm86
.regs
.esp
;
873 context
->Ebp
= vm86
.regs
.ebp
;
874 context
->Eip
= vm86
.regs
.eip
;
875 context
->SegCs
= vm86
.regs
.cs
;
876 context
->SegDs
= vm86
.regs
.ds
;
877 context
->SegEs
= vm86
.regs
.es
;
878 context
->SegFs
= vm86
.regs
.fs
;
879 context
->SegGs
= vm86
.regs
.gs
;
880 context
->EFlags
= vm86
.regs
.eflags
;
882 switch(VM86_TYPE(res
))
884 case VM86_SIGNAL
: /* return due to signal */
885 switch(VM86_ARG(res
))
892 do_segv( context
, T_UNKNOWN
, 0, 0 );
895 do_trap( context
, T_UNKNOWN
);
898 do_fpe( context
, T_UNKNOWN
);
901 rec
.ExceptionCode
= EXCEPTION_VM86_SIGNAL
;
903 case VM86_UNKNOWN
: /* unhandled GP fault - IO-instruction or similar */
904 do_segv( context
, T_PROTFLT
, 0, 0 );
906 case VM86_TRAP
: /* return due to DOS-debugger request */
907 do_trap( context
, T_UNKNOWN
);
909 case VM86_INTx
: /* int3/int x instruction (ARG = x) */
910 rec
.ExceptionCode
= EXCEPTION_VM86_INTx
;
912 case VM86_STI
: /* sti/popf/iret instruction enabled virtual interrupts */
913 rec
.ExceptionCode
= EXCEPTION_VM86_STI
;
915 case VM86_PICRETURN
: /* return due to pending PIC request */
916 rec
.ExceptionCode
= EXCEPTION_VM86_PICRETURN
;
919 ERR( "unhandled result from vm86 mode %x\n", res
);
922 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
923 rec
.ExceptionRecord
= NULL
;
924 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
925 rec
.NumberParameters
= 1;
926 rec
.ExceptionInformation
[0] = VM86_ARG(res
);
927 EXC_RtlRaiseException( &rec
, context
);
932 void __wine_enter_vm86( CONTEXT
*context
)
934 MESSAGE("vm86 mode not supported on this platform\n");
938 /**********************************************************************
939 * DbgBreakPoint (NTDLL)
941 void WINAPI
DbgBreakPoint(void);
942 __ASM_GLOBAL_FUNC( DbgBreakPoint
, "int $3; ret");
944 /**********************************************************************
945 * DbgUserBreakPoint (NTDLL)
947 void WINAPI
DbgUserBreakPoint(void);
948 __ASM_GLOBAL_FUNC( DbgUserBreakPoint
, "int $3; ret");
950 #endif /* __i386__ */