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 #ifdef HAVE_SYS_SIGNAL_H
33 # include <sys/signal.h>
37 #include "selectors.h"
39 /***********************************************************************
40 * signal context platform-specific definitions
46 unsigned short sc_gs, __gsh;
47 unsigned short sc_fs, __fsh;
48 unsigned short sc_es, __esh;
49 unsigned short sc_ds, __dsh;
58 unsigned long sc_trapno;
61 unsigned short sc_cs, __csh;
62 unsigned long sc_eflags;
63 unsigned long esp_at_signal;
64 unsigned short sc_ss, __ssh;
66 unsigned long oldmask;
70 #define HANDLER_DEF(name) void name( int __signal, SIGCONTEXT __context )
71 #define HANDLER_CONTEXT (&__context)
73 /* this is the sigaction structure from the Linux 2.1.20 kernel. */
74 struct kernel_sigaction
76 void (*ksa_handler)();
77 unsigned long ksa_mask;
78 unsigned long ksa_flags;
82 /* Similar to the sigaction function in libc, except it leaves alone the
83 restorer field, which is used to specify the signal stack address */
84 static inline int wine_sigaction( int sig, struct kernel_sigaction *new,
85 struct kernel_sigaction *old )
87 __asm__ __volatile__( "pushl %%ebx\n\t"
92 : "0" (SYS_sigaction), "r" (sig), "c" (new), "d" (old) );
98 #ifdef HAVE_SIGALTSTACK
99 /* direct syscall for sigaltstack to work around glibc 2.0 brain-damage */
100 static inline int wine_sigaltstack( const struct sigaltstack *new,
101 struct sigaltstack *old )
104 __asm__ __volatile__( "pushl %%ebx\n\t"
109 : "0" (SYS_sigaltstack), "r" (new), "c" (old) );
110 if (ret >= 0) return 0;
116 int vm86_enter( struct vm86plus_struct *ptr );
118 __ASM_GLOBAL_FUNC(vm86_enter,
120 "movl %esp, %ebp\n\t"
121 "movl $166,%eax\n\t" /*SYS_vm86*/
123 "movl 8(%ebp),%ecx\n\t"
125 "movl $1,%ebx\n\t" /*VM86_ENTER*/
126 "pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */
128 ".globl " __ASM_NAME("vm86_return") "\n\t"
129 ".type " __ASM_NAME("vm86_return") ",@function\n"
130 __ASM_NAME("vm86_return") ":\n\t"
141 #define EAX_sig(context) ((context)->tf_eax)
142 #define EBX_sig(context) ((context)->tf_ebx)
143 #define ECX_sig(context) ((context)->tf_ecx)
144 #define EDX_sig(context) ((context)->tf_edx)
145 #define ESI_sig(context) ((context)->tf_esi)
146 #define EDI_sig(context) ((context)->tf_edi)
147 #define EBP_sig(context) ((context)->tf_ebp)
149 #define CS_sig(context) ((context)->tf_cs)
150 #define DS_sig(context) ((context)->tf_ds)
151 #define ES_sig(context) ((context)->tf_es)
152 #define SS_sig(context) ((context)->tf_ss)
154 #include <machine/frame.h>
155 typedef struct trapframe SIGCONTEXT;
157 #define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
158 #define HANDLER_CONTEXT __context
160 #define EFL_sig(context) ((context)->tf_eflags)
162 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
163 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
167 #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
169 typedef struct sigcontext SIGCONTEXT;
171 #define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
172 #define HANDLER_CONTEXT __context
176 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
179 #include <sys/regset.h>
183 #include <sys/ucontext.h>
185 typedef struct ucontext SIGCONTEXT;
187 #define HANDLER_DEF(name) void name( int __signal, void *__siginfo, SIGCONTEXT *__context )
188 #define HANDLER_CONTEXT __context
190 #endif /* svr4 || SCO_DS */
196 unsigned long ContextFlags;
197 FLOATING_SAVE_AREA sc_float;
202 unsigned long sc_edi;
203 unsigned long sc_esi;
204 unsigned long sc_eax;
205 unsigned long sc_ebx;
206 unsigned long sc_ecx;
207 unsigned long sc_edx;
208 unsigned long sc_ebp;
209 unsigned long sc_eip;
211 unsigned long sc_eflags;
212 unsigned long sc_esp;
219 #if defined(linux) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__EMX__)
221 #define EAX_sig(context) ((context)->sc_eax)
222 #define EBX_sig(context) ((context)->sc_ebx)
223 #define ECX_sig(context) ((context)->sc_ecx)
224 #define EDX_sig(context) ((context)->sc_edx)
225 #define ESI_sig(context) ((context)->sc_esi)
226 #define EDI_sig(context) ((context)->sc_edi)
227 #define EBP_sig(context) ((context)->sc_ebp)
229 #define CS_sig(context) ((context)->sc_cs)
230 #define DS_sig(context) ((context)->sc_ds)
231 #define ES_sig(context) ((context)->sc_es)
232 #define SS_sig(context) ((context)->sc_ss)
234 /* FS and GS are now in the sigcontext struct of FreeBSD, but not
235 * saved by the exception handling. duh.
236 * Actually they are in -current (have been for a while), and that
237 * patch now finally has been MFC'd to -stable too (Nov 15 1999).
238 * If you're running a system from the -stable branch older than that,
239 * like a 3.3-RELEASE, grab the patch from the ports tree:
240 * ftp://ftp.freebsd.org/pub/FreeBSD/FreeBSD-current/ports/emulators/wine/files/patch-3.3-sys-fsgs
241 * (If its not yet there when you look, go here:
242 * http://www.jelal.kn-bremen.de/freebsd/ports/emulators/wine/files/ )
245 #define FS_sig(context) ((context)->sc_fs)
246 #define GS_sig(context) ((context)->sc_gs)
250 #define FS_sig(context) ((context)->sc_fs)
251 #define GS_sig(context) ((context)->sc_gs)
252 #define CR2_sig(context) ((context)->cr2)
253 #define TRAP_sig(context) ((context)->sc_trapno)
254 #define ERROR_sig(context) ((context)->sc_err)
255 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->i387))
259 #define EFL_sig(context) ((context)->sc_eflags)
261 #define EFL_sig(context) ((context)->sc_efl)
262 /* FreeBSD, see i386/i386/traps.c::trap_pfault va->err kludge */
263 #define CR2_sig(context) ((context)->sc_err)
264 #define TRAP_sig(context) ((context)->sc_trapno)
267 #define EIP_sig(context) (*((unsigned long*)&(context)->sc_eip))
268 #define ESP_sig(context) (*((unsigned long*)&(context)->sc_esp))
270 #endif /* linux || __NetBSD__ || __FreeBSD__ || __OpenBSD__ */
272 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
278 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
279 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
280 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
281 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
282 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
283 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
284 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
286 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
287 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
288 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
289 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
291 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
292 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
294 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
296 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
298 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
300 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
303 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
306 #endif /* svr4 || SCO_DS */
309 /* exception code definitions (already defined by FreeBSD) */
310 #ifndef __FreeBSD__ /* FIXME: other BSDs? */
311 #define T_DIVIDE 0 /* Division by zero exception */
312 #define T_TRCTRAP 1 /* Single-step exception */
313 #define T_NMI 2 /* NMI interrupt */
314 #define T_BPTFLT 3 /* Breakpoint exception */
315 #define T_OFLOW 4 /* Overflow exception */
316 #define T_BOUND 5 /* Bound range exception */
317 #define T_PRIVINFLT 6 /* Invalid opcode exception */
318 #define T_DNA 7 /* Device not available exception */
319 #define T_DOUBLEFLT 8 /* Double fault exception */
320 #define T_FPOPFLT 9 /* Coprocessor segment overrun */
321 #define T_TSSFLT 10 /* Invalid TSS exception */
322 #define T_SEGNPFLT 11 /* Segment not present exception */
323 #define T_STKFLT 12 /* Stack fault */
324 #define T_PROTFLT 13 /* General protection fault */
325 #define T_PAGEFLT 14 /* Page fault */
326 #define T_RESERVED 15 /* Unknown exception */
327 #define T_ARITHTRAP 16 /* Floating point exception */
328 #define T_ALIGNFLT 17 /* Alignment check exception */
329 #define T_MCHK 18 /* Machine check exception */
330 #define T_CACHEFLT 19 /* Cache flush exception */
333 #define T_UNKNOWN (-1) /* Unknown fault (TRAP_sig not defined) */
335 #include "wine/exception.h"
337 #include "stackframe.h"
341 #include "syslevel.h"
342 #include "debugtools.h"
344 DEFAULT_DEBUG_CHANNEL(seh);
347 /***********************************************************************
350 * Get the trap code for a signal.
352 static inline int get_trap_code( const SIGCONTEXT *sigcontext )
355 return TRAP_sig(sigcontext);
357 return T_UNKNOWN; /* unknown trap code */
361 /***********************************************************************
364 * Get the error code for a signal.
366 static inline int get_error_code( const SIGCONTEXT *sigcontext )
369 return ERROR_sig(sigcontext);
375 /***********************************************************************
378 * Get the CR2 value for a signal.
380 static inline void *get_cr2_value( const SIGCONTEXT *sigcontext )
383 return (void *)CR2_sig(sigcontext);
389 /***********************************************************************
392 * Set the register values from a sigcontext.
394 static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
397 /* get %fs at time of the fault */
399 fs = FS_sig(sigcontext);
405 /* now restore a proper %fs for the fault handler */
406 if (!IS_SELECTOR_SYSTEM(CS_sig(sigcontext))) /* 16-bit mode */
408 fs = SYSLEVEL_Win16CurrentTeb;
411 else if ((void *)EIP_sig(sigcontext) == vm86_return) /* vm86 mode */
413 /* retrieve pointer to vm86plus struct that was stored in vm86_enter */
414 struct vm86plus_struct *vm86 = *(struct vm86plus_struct **)ESP_sig(sigcontext);
415 /* fetch the saved %fs on the stack */
416 fs = *((unsigned int *)ESP_sig(sigcontext) + 2);
418 /* get context from vm86 struct */
419 context->Eax = vm86->regs.eax;
420 context->Ebx = vm86->regs.ebx;
421 context->Ecx = vm86->regs.ecx;
422 context->Edx = vm86->regs.edx;
423 context->Esi = vm86->regs.esi;
424 context->Edi = vm86->regs.edi;
425 context->Esp = vm86->regs.esp;
426 context->Ebp = vm86->regs.ebp;
427 context->Eip = vm86->regs.eip;
428 context->SegCs = vm86->regs.cs;
429 context->SegDs = vm86->regs.ds;
430 context->SegEs = vm86->regs.es;
431 context->SegFs = vm86->regs.fs;
432 context->SegGs = vm86->regs.gs;
433 context->SegSs = vm86->regs.ss;
434 context->EFlags = vm86->regs.eflags;
441 context->Eax = EAX_sig(sigcontext);
442 context->Ebx = EBX_sig(sigcontext);
443 context->Ecx = ECX_sig(sigcontext);
444 context->Edx = EDX_sig(sigcontext);
445 context->Esi = ESI_sig(sigcontext);
446 context->Edi = EDI_sig(sigcontext);
447 context->Ebp = EBP_sig(sigcontext);
448 context->EFlags = EFL_sig(sigcontext);
449 context->Eip = EIP_sig(sigcontext);
450 context->Esp = ESP_sig(sigcontext);
451 context->SegCs = LOWORD(CS_sig(sigcontext));
452 context->SegDs = LOWORD(DS_sig(sigcontext));
453 context->SegEs = LOWORD(ES_sig(sigcontext));
454 context->SegSs = LOWORD(SS_sig(sigcontext));
456 context->SegGs = LOWORD(GS_sig(sigcontext));
458 context->SegGs = __get_gs();
463 /***********************************************************************
466 * Build a sigcontext from the register values.
468 static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
471 /* check if exception occurred in vm86 mode */
472 if ((void *)EIP_sig(sigcontext) == vm86_return &&
473 IS_SELECTOR_SYSTEM(CS_sig(sigcontext)))
475 /* retrieve pointer to vm86plus struct that was stored in vm86_enter */
476 struct vm86plus_struct *vm86 = *(struct vm86plus_struct **)ESP_sig(sigcontext);
477 vm86->regs.eax = context->Eax;
478 vm86->regs.ebx = context->Ebx;
479 vm86->regs.ecx = context->Ecx;
480 vm86->regs.edx = context->Edx;
481 vm86->regs.esi = context->Esi;
482 vm86->regs.edi = context->Edi;
483 vm86->regs.esp = context->Esp;
484 vm86->regs.ebp = context->Ebp;
485 vm86->regs.eip = context->Eip;
486 vm86->regs.cs = context->SegCs;
487 vm86->regs.ds = context->SegDs;
488 vm86->regs.es = context->SegEs;
489 vm86->regs.fs = context->SegFs;
490 vm86->regs.gs = context->SegGs;
491 vm86->regs.ss = context->SegSs;
492 vm86->regs.eflags = context->EFlags;
497 EAX_sig(sigcontext) = context->Eax;
498 EBX_sig(sigcontext) = context->Ebx;
499 ECX_sig(sigcontext) = context->Ecx;
500 EDX_sig(sigcontext) = context->Edx;
501 ESI_sig(sigcontext) = context->Esi;
502 EDI_sig(sigcontext) = context->Edi;
503 EBP_sig(sigcontext) = context->Ebp;
504 EFL_sig(sigcontext) = context->EFlags;
505 EIP_sig(sigcontext) = context->Eip;
506 ESP_sig(sigcontext) = context->Esp;
507 CS_sig(sigcontext) = context->SegCs;
508 DS_sig(sigcontext) = context->SegDs;
509 ES_sig(sigcontext) = context->SegEs;
510 SS_sig(sigcontext) = context->SegSs;
512 FS_sig(sigcontext) = context->SegFs;
514 __set_fs( context->SegFs );
517 GS_sig(sigcontext) = context->SegGs;
519 __set_gs( context->SegGs );
524 /***********************************************************************
527 * Set the FPU context from a sigcontext.
529 inline static void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
532 if (FPU_sig(sigcontext))
534 context->FloatSave = *FPU_sig(sigcontext);
539 __asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) );
540 #endif /* __GNUC__ */
544 /***********************************************************************
547 * Restore the FPU context to a sigcontext.
549 inline static void restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
551 /* reset the current interrupt status */
552 context->FloatSave.StatusWord &= context->FloatSave.ControlWord | 0xffffff80;
554 if (FPU_sig(sigcontext))
556 *FPU_sig(sigcontext) = context->FloatSave;
561 /* avoid nested exceptions */
562 __asm__ __volatile__( "frstor %0; fwait" : : "m" (context->FloatSave) );
563 #endif /* __GNUC__ */
567 /**********************************************************************
570 * Get the FPU exception code from the FPU status.
572 static inline DWORD get_fpu_code( const CONTEXT *context )
574 DWORD status = context->FloatSave.StatusWord;
576 if (status & 0x01) /* IE */
578 if (status & 0x40) /* SF */
579 return EXCEPTION_FLT_STACK_CHECK;
581 return EXCEPTION_FLT_INVALID_OPERATION;
583 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
584 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
585 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
586 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
587 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
588 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
592 /**********************************************************************
595 * Implementation of SIGSEGV handler.
597 static void do_segv( CONTEXT *context, int trap_code, void *cr2, int err_code )
599 EXCEPTION_RECORD rec;
600 DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
603 /* we want the page-fault case to be fast */
604 if (trap_code == T_PAGEFLT)
605 if (!(page_fault_code = VIRTUAL_HandleFault( cr2 ))) return;
608 rec.ExceptionRecord = NULL;
609 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
610 rec.ExceptionAddress = (LPVOID)context->Eip;
611 rec.NumberParameters = 0;
615 case T_OFLOW: /* Overflow exception */
616 rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
618 case T_BOUND: /* Bound range exception */
619 rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
621 case T_PRIVINFLT: /* Invalid opcode exception */
622 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
624 case T_STKFLT: /* Stack fault */
625 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
627 case T_SEGNPFLT: /* Segment not present exception */
628 case T_PROTFLT: /* General protection fault */
629 case T_UNKNOWN: /* Unknown fault code */
630 if (INSTR_EmulateInstruction( context )) return;
631 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
633 case T_PAGEFLT: /* Page fault */
635 rec.NumberParameters = 2;
636 rec.ExceptionInformation[0] = (err_code & 2) != 0;
637 rec.ExceptionInformation[1] = (DWORD)cr2;
639 rec.ExceptionCode = page_fault_code;
641 case T_ALIGNFLT: /* Alignment check exception */
642 /* FIXME: pass through exception handler first? */
643 if (context->EFlags & 0x00040000)
645 /* Disable AC flag, return */
646 context->EFlags &= ~0x00040000;
649 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
652 ERR( "Got unexpected trap %d\n", trap_code );
654 case T_NMI: /* NMI interrupt */
655 case T_DNA: /* Device not available exception */
656 case T_DOUBLEFLT: /* Double fault exception */
657 case T_TSSFLT: /* Invalid TSS exception */
658 case T_RESERVED: /* Unknown exception */
659 case T_MCHK: /* Machine check exception */
661 case T_CACHEFLT: /* Cache flush exception */
663 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
666 EXC_RtlRaiseException( &rec, context );
670 /**********************************************************************
673 * Implementation of SIGTRAP handler.
675 static void do_trap( CONTEXT *context, int trap_code )
677 EXCEPTION_RECORD rec;
679 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
680 rec.ExceptionRecord = NULL;
681 rec.ExceptionAddress = (LPVOID)context->Eip;
682 rec.NumberParameters = 0;
686 case T_TRCTRAP: /* Single-step exception */
687 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
688 context->EFlags &= ~0x100; /* clear single-step flag */
690 case T_BPTFLT: /* Breakpoint exception */
691 rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
694 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
697 EXC_RtlRaiseException( &rec, context );
701 /**********************************************************************
704 * Implementation of SIGFPE handler
706 static void do_fpe( CONTEXT *context, int trap_code )
708 EXCEPTION_RECORD rec;
712 case T_DIVIDE: /* Division by zero exception */
713 rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
715 case T_FPOPFLT: /* Coprocessor segment overrun */
716 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
718 case T_ARITHTRAP: /* Floating point exception */
719 case T_UNKNOWN: /* Unknown fault code */
720 rec.ExceptionCode = get_fpu_code( context );
723 ERR( "Got unexpected trap %d\n", trap_code );
724 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
727 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
728 rec.ExceptionRecord = NULL;
729 rec.ExceptionAddress = (LPVOID)context->Eip;
730 rec.NumberParameters = 0;
731 EXC_RtlRaiseException( &rec, context );
735 /**********************************************************************
738 * Handler for SIGSEGV and related errors.
740 static HANDLER_DEF(segv_handler)
743 save_context( &context, HANDLER_CONTEXT );
744 do_segv( &context, get_trap_code(HANDLER_CONTEXT),
745 get_cr2_value(HANDLER_CONTEXT), get_error_code(HANDLER_CONTEXT) );
746 restore_context( &context, HANDLER_CONTEXT );
750 /**********************************************************************
753 * Handler for SIGTRAP.
755 static HANDLER_DEF(trap_handler)
758 save_context( &context, HANDLER_CONTEXT );
759 do_trap( &context, get_trap_code(HANDLER_CONTEXT) );
760 restore_context( &context, HANDLER_CONTEXT );
764 /**********************************************************************
767 * Handler for SIGFPE.
769 static HANDLER_DEF(fpe_handler)
772 save_fpu( &context, HANDLER_CONTEXT );
773 save_context( &context, HANDLER_CONTEXT );
774 do_fpe( &context, get_trap_code(HANDLER_CONTEXT) );
775 restore_context( &context, HANDLER_CONTEXT );
776 restore_fpu( &context, HANDLER_CONTEXT );
780 /**********************************************************************
783 * Handler for SIGINT.
785 static HANDLER_DEF(int_handler)
787 EXCEPTION_RECORD rec;
790 save_context( &context, HANDLER_CONTEXT );
791 rec.ExceptionCode = CONTROL_C_EXIT;
792 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
793 rec.ExceptionRecord = NULL;
794 rec.ExceptionAddress = (LPVOID)context.Eip;
795 rec.NumberParameters = 0;
796 EXC_RtlRaiseException( &rec, &context );
797 restore_context( &context, HANDLER_CONTEXT );
801 /***********************************************************************
804 * Set a signal handler
806 static int set_handler( int sig, int have_sigaltstack, void (*func)() )
808 struct sigaction sig_act;
811 if (!have_sigaltstack && NtCurrentTeb()->signal_stack)
813 struct kernel_sigaction sig_act;
814 sig_act.ksa_handler = func;
815 sig_act.ksa_flags = SA_RESTART | SA_NOMASK;
816 sig_act.ksa_mask = 0;
817 /* point to the top of the stack */
818 sig_act.ksa_restorer = (char *)NtCurrentTeb()->signal_stack + SIGNAL_STACK_SIZE;
819 return wine_sigaction( sig, &sig_act, NULL );
822 sig_act.sa_handler = func;
823 sigemptyset( &sig_act.sa_mask );
826 sig_act.sa_flags = SA_RESTART | SA_NOMASK;
827 #elif defined (__svr4__) || defined(_SCO_DS)
828 sig_act.sa_flags = SA_SIGINFO | SA_RESTART;
830 sig_act.sa_flags = 0;
834 if (have_sigaltstack) sig_act.sa_flags |= SA_ONSTACK;
836 return sigaction( sig, &sig_act, NULL );
840 /**********************************************************************
843 BOOL SIGNAL_Init(void)
845 int have_sigaltstack = 0;
847 #ifdef HAVE_SIGALTSTACK
848 struct sigaltstack ss;
849 if ((ss.ss_sp = NtCurrentTeb()->signal_stack))
851 ss.ss_size = SIGNAL_STACK_SIZE;
853 if (!sigaltstack(&ss, NULL)) have_sigaltstack = 1;
855 /* sigaltstack may fail because the kernel is too old, or
856 because glibc is brain-dead. In the latter case a
857 direct system call should succeed. */
858 else if (!wine_sigaltstack(&ss, NULL)) have_sigaltstack = 1;
861 #endif /* HAVE_SIGALTSTACK */
863 /* automatic child reaping to avoid zombies */
864 signal( SIGCHLD, SIG_IGN );
866 if (set_handler( SIGINT, have_sigaltstack, (void (*)())int_handler ) == -1) goto error;
867 if (set_handler( SIGFPE, have_sigaltstack, (void (*)())fpe_handler ) == -1) goto error;
868 if (set_handler( SIGSEGV, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
869 if (set_handler( SIGILL, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
871 if (set_handler( SIGBUS, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
874 if (set_handler( SIGTRAP, have_sigaltstack, (void (*)())trap_handler ) == -1) goto error;
885 /**********************************************************************
888 * Enter vm86 mode with the specified register context.
890 void __wine_enter_vm86( CONTEXT *context )
892 EXCEPTION_RECORD rec;
894 struct vm86plus_struct vm86;
896 memset( &vm86, 0, sizeof(vm86) );
899 vm86.regs.eax = context->Eax;
900 vm86.regs.ebx = context->Ebx;
901 vm86.regs.ecx = context->Ecx;
902 vm86.regs.edx = context->Edx;
903 vm86.regs.esi = context->Esi;
904 vm86.regs.edi = context->Edi;
905 vm86.regs.esp = context->Esp;
906 vm86.regs.ebp = context->Ebp;
907 vm86.regs.eip = context->Eip;
908 vm86.regs.cs = context->SegCs;
909 vm86.regs.ds = context->SegDs;
910 vm86.regs.es = context->SegEs;
911 vm86.regs.fs = context->SegFs;
912 vm86.regs.gs = context->SegGs;
913 vm86.regs.ss = context->SegSs;
914 vm86.regs.eflags = context->EFlags;
918 res = vm86_enter( &vm86 );
924 } while (VM86_TYPE(res) == VM86_SIGNAL);
926 context->Eax = vm86.regs.eax;
927 context->Ebx = vm86.regs.ebx;
928 context->Ecx = vm86.regs.ecx;
929 context->Edx = vm86.regs.edx;
930 context->Esi = vm86.regs.esi;
931 context->Edi = vm86.regs.edi;
932 context->Esp = vm86.regs.esp;
933 context->Ebp = vm86.regs.ebp;
934 context->Eip = vm86.regs.eip;
935 context->SegCs = vm86.regs.cs;
936 context->SegDs = vm86.regs.ds;
937 context->SegEs = vm86.regs.es;
938 context->SegFs = vm86.regs.fs;
939 context->SegGs = vm86.regs.gs;
940 context->SegSs = vm86.regs.ss;
941 context->EFlags = vm86.regs.eflags;
943 switch(VM86_TYPE(res))
945 case VM86_UNKNOWN: /* unhandled GP fault - IO-instruction or similar */
946 do_segv( context, T_PROTFLT, 0, 0 );
948 case VM86_TRAP: /* return due to DOS-debugger request */
949 do_trap( context, VM86_ARG(res) );
951 case VM86_INTx: /* int3/int x instruction (ARG = x) */
952 rec.ExceptionCode = EXCEPTION_VM86_INTx;
954 case VM86_STI: /* sti/popf/iret instruction enabled virtual interrupts */
955 rec.ExceptionCode = EXCEPTION_VM86_STI;
957 case VM86_PICRETURN: /* return due to pending PIC request */
958 rec.ExceptionCode = EXCEPTION_VM86_PICRETURN;
961 ERR( "unhandled result from vm86 mode %x\n", res );
964 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
965 rec.ExceptionRecord = NULL;
966 rec.ExceptionAddress = (LPVOID)context->Eip;
967 rec.NumberParameters = 1;
968 rec.ExceptionInformation[0] = VM86_ARG(res);
969 EXC_RtlRaiseException( &rec, context );
974 void __wine_enter_vm86( CONTEXT *context )
976 MESSAGE("vm86 mode not supported on this platform\n");
980 /**********************************************************************
981 * DbgBreakPoint (NTDLL)
983 void WINAPI DbgBreakPoint(void);
984 __ASM_GLOBAL_FUNC( DbgBreakPoint, "int $3; ret");
986 /**********************************************************************
987 * DbgUserBreakPoint (NTDLL)
989 void WINAPI DbgUserBreakPoint(void);
990 __ASM_GLOBAL_FUNC( DbgUserBreakPoint, "int $3; ret");
992 #endif /* __i386__ */