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 */
152 ".globl " __ASM_NAME("vm86_return") "\n\t"
153 __ASM_FUNC("vm86_return") "\n"
154 __ASM_NAME("vm86_return") ":\n\t"
159 "testl %eax,%eax\n\t"
161 "cmpb $0,%al\n\t" /* VM86_SIGNAL */
162 "je " __ASM_NAME("vm86_enter") "\n\t"
164 "movl 4(%esp),%ecx\n\t" /* vm86_ptr */
166 ".globl " __ASM_NAME("vm86_return_end") "\n\t"
167 __ASM_FUNC("vm86_return_end") "\n"
168 __ASM_NAME("vm86_return_end") ":\n\t"
171 #ifdef HAVE_SYS_VM86_H
179 #define EAX_sig(context) ((context)->tf_eax)
180 #define EBX_sig(context) ((context)->tf_ebx)
181 #define ECX_sig(context) ((context)->tf_ecx)
182 #define EDX_sig(context) ((context)->tf_edx)
183 #define ESI_sig(context) ((context)->tf_esi)
184 #define EDI_sig(context) ((context)->tf_edi)
185 #define EBP_sig(context) ((context)->tf_ebp)
187 #define CS_sig(context) ((context)->tf_cs)
188 #define DS_sig(context) ((context)->tf_ds)
189 #define ES_sig(context) ((context)->tf_es)
190 #define SS_sig(context) ((context)->tf_ss)
192 #include <machine/frame.h>
193 typedef struct trapframe SIGCONTEXT;
195 #define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
196 #define HANDLER_CONTEXT __context
198 #define EFL_sig(context) ((context)->tf_eflags)
200 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
201 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
205 #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
207 typedef struct sigcontext SIGCONTEXT;
209 #define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
210 #define HANDLER_CONTEXT __context
214 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
217 #include <sys/regset.h>
221 #include <sys/ucontext.h>
223 typedef struct ucontext SIGCONTEXT;
225 #define HANDLER_DEF(name) void name( int __signal, void *__siginfo, SIGCONTEXT *__context )
226 #define HANDLER_CONTEXT __context
228 #endif /* svr4 || SCO_DS */
234 unsigned long ContextFlags;
235 FLOATING_SAVE_AREA sc_float;
240 unsigned long sc_edi;
241 unsigned long sc_esi;
242 unsigned long sc_eax;
243 unsigned long sc_ebx;
244 unsigned long sc_ecx;
245 unsigned long sc_edx;
246 unsigned long sc_ebp;
247 unsigned long sc_eip;
249 unsigned long sc_eflags;
250 unsigned long sc_esp;
258 /* FIXME: This section is just here so it can compile, it's most likely
259 * completely wrong. */
263 unsigned short sc_gs, __gsh;
264 unsigned short sc_fs, __fsh;
265 unsigned short sc_es, __esh;
266 unsigned short sc_ds, __dsh;
267 unsigned long sc_edi;
268 unsigned long sc_esi;
269 unsigned long sc_ebp;
270 unsigned long sc_esp;
271 unsigned long sc_ebx;
272 unsigned long sc_edx;
273 unsigned long sc_ecx;
274 unsigned long sc_eax;
275 unsigned long sc_trapno;
276 unsigned long sc_err;
277 unsigned long sc_eip;
278 unsigned short sc_cs, __csh;
279 unsigned long sc_eflags;
280 unsigned long esp_at_signal;
281 unsigned short sc_ss, __ssh;
283 unsigned long oldmask;
287 #define HANDLER_DEF(name) void name( int __signal, SIGCONTEXT __context )
288 #define HANDLER_CONTEXT (&__context)
290 #endif /* __CYGWIN__ */
292 #if defined(linux) || defined(__NetBSD__) || defined(__FreeBSD__) ||\
293 defined(__OpenBSD__) || defined(__EMX__) || defined(__CYGWIN__)
295 #define EAX_sig(context) ((context)->sc_eax)
296 #define EBX_sig(context) ((context)->sc_ebx)
297 #define ECX_sig(context) ((context)->sc_ecx)
298 #define EDX_sig(context) ((context)->sc_edx)
299 #define ESI_sig(context) ((context)->sc_esi)
300 #define EDI_sig(context) ((context)->sc_edi)
301 #define EBP_sig(context) ((context)->sc_ebp)
303 #define CS_sig(context) ((context)->sc_cs)
304 #define DS_sig(context) ((context)->sc_ds)
305 #define ES_sig(context) ((context)->sc_es)
306 #define SS_sig(context) ((context)->sc_ss)
308 /* FS and GS are now in the sigcontext struct of FreeBSD, but not
309 * saved by the exception handling. duh.
310 * Actually they are in -current (have been for a while), and that
311 * patch now finally has been MFC'd to -stable too (Nov 15 1999).
312 * If you're running a system from the -stable branch older than that,
313 * like a 3.3-RELEASE, grab the patch from the ports tree:
314 * ftp://ftp.freebsd.org/pub/FreeBSD/FreeBSD-current/ports/emulators/wine/files/patch-3.3-sys-fsgs
315 * (If its not yet there when you look, go here:
316 * http://www.jelal.kn-bremen.de/freebsd/ports/emulators/wine/files/ )
319 #define FS_sig(context) ((context)->sc_fs)
320 #define GS_sig(context) ((context)->sc_gs)
324 #define FS_sig(context) ((context)->sc_fs)
325 #define GS_sig(context) ((context)->sc_gs)
326 #define CR2_sig(context) ((context)->cr2)
327 #define TRAP_sig(context) ((context)->sc_trapno)
328 #define ERROR_sig(context) ((context)->sc_err)
329 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->i387))
333 #define EFL_sig(context) ((context)->sc_eflags)
335 #define EFL_sig(context) ((context)->sc_efl)
336 /* FreeBSD, see i386/i386/traps.c::trap_pfault va->err kludge */
337 #define CR2_sig(context) ((context)->sc_err)
338 #define TRAP_sig(context) ((context)->sc_trapno)
341 #define EIP_sig(context) (*((unsigned long*)&(context)->sc_eip))
342 #define ESP_sig(context) (*((unsigned long*)&(context)->sc_esp))
344 #endif /* linux || __NetBSD__ || __FreeBSD__ || __OpenBSD__ */
346 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
352 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
353 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
354 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
355 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
356 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
357 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
358 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
360 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
361 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
362 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
363 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
365 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
366 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
368 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
370 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
372 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
374 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
377 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
380 #endif /* svr4 || SCO_DS */
383 /* exception code definitions (already defined by FreeBSD/NetBSD) */
384 #if !defined(__FreeBSD__) && !defined(__NetBSD__) /* FIXME: other BSDs? */
385 #define T_DIVIDE 0 /* Division by zero exception */
386 #define T_TRCTRAP 1 /* Single-step exception */
387 #define T_NMI 2 /* NMI interrupt */
388 #define T_BPTFLT 3 /* Breakpoint exception */
389 #define T_OFLOW 4 /* Overflow exception */
390 #define T_BOUND 5 /* Bound range exception */
391 #define T_PRIVINFLT 6 /* Invalid opcode exception */
392 #define T_DNA 7 /* Device not available exception */
393 #define T_DOUBLEFLT 8 /* Double fault exception */
394 #define T_FPOPFLT 9 /* Coprocessor segment overrun */
395 #define T_TSSFLT 10 /* Invalid TSS exception */
396 #define T_SEGNPFLT 11 /* Segment not present exception */
397 #define T_STKFLT 12 /* Stack fault */
398 #define T_PROTFLT 13 /* General protection fault */
399 #define T_PAGEFLT 14 /* Page fault */
400 #define T_RESERVED 15 /* Unknown exception */
401 #define T_ARITHTRAP 16 /* Floating point exception */
402 #define T_ALIGNFLT 17 /* Alignment check exception */
403 #define T_MCHK 18 /* Machine check exception */
404 #define T_CACHEFLT 19 /* Cache flush exception */
406 #if defined(__NetBSD__)
407 #define T_MCHK 19 /* Machine check exception */
410 #define T_UNKNOWN (-1) /* Unknown fault (TRAP_sig not defined) */
412 #include "wine/exception.h"
413 #include "stackframe.h"
416 #include "syslevel.h"
417 #include "wine/debug.h"
419 WINE_DEFAULT_DEBUG_CHANNEL(seh);
421 typedef int (*wine_signal_handler)(unsigned int sig);
423 static wine_signal_handler handlers[256];
425 static sigset_t all_sigs;
427 extern void WINAPI EXC_RtlRaiseException( PEXCEPTION_RECORD, PCONTEXT );
429 /***********************************************************************
432 inline static int dispatch_signal(unsigned int sig)
434 if (handlers[sig] == NULL) return 0;
435 return handlers[sig](sig);
439 /***********************************************************************
442 * Get the trap code for a signal.
444 static inline int get_trap_code( const SIGCONTEXT *sigcontext )
447 return TRAP_sig(sigcontext);
449 return T_UNKNOWN; /* unknown trap code */
453 /***********************************************************************
456 * Get the error code for a signal.
458 static inline int get_error_code( const SIGCONTEXT *sigcontext )
461 return ERROR_sig(sigcontext);
467 /***********************************************************************
470 * Get the CR2 value for a signal.
472 static inline void *get_cr2_value( const SIGCONTEXT *sigcontext )
475 return (void *)CR2_sig(sigcontext);
483 /***********************************************************************
486 * Set the register values from a vm86 structure.
488 static void save_vm86_context( CONTEXT *context, const struct vm86plus_struct *vm86 )
490 context->Eax = vm86->regs.eax;
491 context->Ebx = vm86->regs.ebx;
492 context->Ecx = vm86->regs.ecx;
493 context->Edx = vm86->regs.edx;
494 context->Esi = vm86->regs.esi;
495 context->Edi = vm86->regs.edi;
496 context->Esp = vm86->regs.esp;
497 context->Ebp = vm86->regs.ebp;
498 context->Eip = vm86->regs.eip;
499 context->SegCs = vm86->regs.cs;
500 context->SegDs = vm86->regs.ds;
501 context->SegEs = vm86->regs.es;
502 context->SegFs = vm86->regs.fs;
503 context->SegGs = vm86->regs.gs;
504 context->SegSs = vm86->regs.ss;
505 context->EFlags = vm86->regs.eflags;
509 /***********************************************************************
510 * restore_vm86_context
512 * Build a vm86 structure from the register values.
514 static void restore_vm86_context( const CONTEXT *context, struct vm86plus_struct *vm86 )
516 vm86->regs.eax = context->Eax;
517 vm86->regs.ebx = context->Ebx;
518 vm86->regs.ecx = context->Ecx;
519 vm86->regs.edx = context->Edx;
520 vm86->regs.esi = context->Esi;
521 vm86->regs.edi = context->Edi;
522 vm86->regs.esp = context->Esp;
523 vm86->regs.ebp = context->Ebp;
524 vm86->regs.eip = context->Eip;
525 vm86->regs.cs = context->SegCs;
526 vm86->regs.ds = context->SegDs;
527 vm86->regs.es = context->SegEs;
528 vm86->regs.fs = context->SegFs;
529 vm86->regs.gs = context->SegGs;
530 vm86->regs.ss = context->SegSs;
531 vm86->regs.eflags = context->EFlags;
533 #endif /* __HAVE_VM86 */
536 /***********************************************************************
539 * Set the register values from a sigcontext.
541 static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
544 /* get %fs at time of the fault */
546 fs = FS_sig(sigcontext);
552 /* now restore a proper %fs for the fault handler */
553 if (!IS_SELECTOR_SYSTEM(CS_sig(sigcontext)) ||
554 !IS_SELECTOR_SYSTEM(SS_sig(sigcontext))) /* 16-bit mode */
557 * Win16 or DOS protected mode. Note that during switch
558 * from 16-bit mode to linear mode, CS may be set to system
559 * segment before FS is restored. Fortunately, in this case
560 * SS is still non-system segment. This is why both CS and SS
563 fs = SYSLEVEL_Win16CurrentTeb;
566 else if ((void *)EIP_sig(sigcontext) == vm86_return) /* vm86 mode */
568 /* fetch the saved %fs on the stack */
569 fs = *(unsigned int *)ESP_sig(sigcontext);
570 if (EAX_sig(sigcontext) == VM86_EAX) {
571 struct vm86plus_struct *vm86;
573 /* retrieve pointer to vm86plus struct that was stored in vm86_enter
574 * (but we could also get if from teb->vm86_ptr) */
575 vm86 = *(struct vm86plus_struct **)(ESP_sig(sigcontext) + sizeof(int));
576 /* get context from vm86 struct */
577 save_vm86_context( context, vm86 );
581 #endif /* __HAVE_VM86 */
585 context->Eax = EAX_sig(sigcontext);
586 context->Ebx = EBX_sig(sigcontext);
587 context->Ecx = ECX_sig(sigcontext);
588 context->Edx = EDX_sig(sigcontext);
589 context->Esi = ESI_sig(sigcontext);
590 context->Edi = EDI_sig(sigcontext);
591 context->Ebp = EBP_sig(sigcontext);
592 context->EFlags = EFL_sig(sigcontext);
593 context->Eip = EIP_sig(sigcontext);
594 context->Esp = ESP_sig(sigcontext);
595 context->SegCs = LOWORD(CS_sig(sigcontext));
596 context->SegDs = LOWORD(DS_sig(sigcontext));
597 context->SegEs = LOWORD(ES_sig(sigcontext));
598 context->SegSs = LOWORD(SS_sig(sigcontext));
600 context->SegGs = LOWORD(GS_sig(sigcontext));
602 context->SegGs = wine_get_gs();
607 /***********************************************************************
610 * Build a sigcontext from the register values.
612 static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
615 /* check if exception occurred in vm86 mode */
616 if ((void *)EIP_sig(sigcontext) == vm86_return &&
617 IS_SELECTOR_SYSTEM(CS_sig(sigcontext)) &&
618 EAX_sig(sigcontext) == VM86_EAX)
620 /* retrieve pointer to vm86plus struct that was stored in vm86_enter
621 * (but we could also get it from teb->vm86_ptr) */
622 struct vm86plus_struct *vm86 = *(struct vm86plus_struct **)(ESP_sig(sigcontext) + sizeof(int));
623 restore_vm86_context( context, vm86 );
626 #endif /* __HAVE_VM86 */
628 EAX_sig(sigcontext) = context->Eax;
629 EBX_sig(sigcontext) = context->Ebx;
630 ECX_sig(sigcontext) = context->Ecx;
631 EDX_sig(sigcontext) = context->Edx;
632 ESI_sig(sigcontext) = context->Esi;
633 EDI_sig(sigcontext) = context->Edi;
634 EBP_sig(sigcontext) = context->Ebp;
635 EFL_sig(sigcontext) = context->EFlags;
636 EIP_sig(sigcontext) = context->Eip;
637 ESP_sig(sigcontext) = context->Esp;
638 CS_sig(sigcontext) = context->SegCs;
639 DS_sig(sigcontext) = context->SegDs;
640 ES_sig(sigcontext) = context->SegEs;
641 SS_sig(sigcontext) = context->SegSs;
643 FS_sig(sigcontext) = context->SegFs;
645 wine_set_fs( context->SegFs );
648 GS_sig(sigcontext) = context->SegGs;
650 wine_set_gs( context->SegGs );
655 /***********************************************************************
658 * Set the FPU context from a sigcontext.
660 inline static void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
663 if (FPU_sig(sigcontext))
665 context->FloatSave = *FPU_sig(sigcontext);
670 __asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) );
671 #endif /* __GNUC__ */
675 /***********************************************************************
678 * Restore the FPU context to a sigcontext.
680 inline static void restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
682 /* reset the current interrupt status */
683 context->FloatSave.StatusWord &= context->FloatSave.ControlWord | 0xffffff80;
685 if (FPU_sig(sigcontext))
687 *FPU_sig(sigcontext) = context->FloatSave;
692 /* avoid nested exceptions */
693 __asm__ __volatile__( "frstor %0; fwait" : : "m" (context->FloatSave) );
694 #endif /* __GNUC__ */
698 /**********************************************************************
701 * Get the FPU exception code from the FPU status.
703 static inline DWORD get_fpu_code( const CONTEXT *context )
705 DWORD status = context->FloatSave.StatusWord;
707 if (status & 0x01) /* IE */
709 if (status & 0x40) /* SF */
710 return EXCEPTION_FLT_STACK_CHECK;
712 return EXCEPTION_FLT_INVALID_OPERATION;
714 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
715 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
716 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
717 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
718 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
719 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
723 /***********************************************************************
726 * Unblock signals. Called from EXC_RtlRaiseException.
728 void SIGNAL_Unblock( void )
730 sigprocmask( SIG_UNBLOCK, &all_sigs, NULL );
734 /**********************************************************************
737 * Implementation of SIGSEGV handler.
739 static void do_segv( CONTEXT *context, int trap_code, void *cr2, int err_code )
741 EXCEPTION_RECORD rec;
742 DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
745 /* we want the page-fault case to be fast */
746 if (trap_code == T_PAGEFLT)
747 if (!(page_fault_code = VIRTUAL_HandleFault( cr2 ))) return;
750 rec.ExceptionRecord = NULL;
751 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
752 rec.ExceptionAddress = (LPVOID)context->Eip;
753 rec.NumberParameters = 0;
757 case T_OFLOW: /* Overflow exception */
758 rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
760 case T_BOUND: /* Bound range exception */
761 rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
763 case T_PRIVINFLT: /* Invalid opcode exception */
764 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
766 case T_STKFLT: /* Stack fault */
767 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
769 case T_SEGNPFLT: /* Segment not present exception */
770 case T_PROTFLT: /* General protection fault */
771 case T_UNKNOWN: /* Unknown fault code */
772 if (INSTR_EmulateInstruction( context )) return;
773 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
775 case T_PAGEFLT: /* Page fault */
777 rec.NumberParameters = 2;
778 rec.ExceptionInformation[0] = (err_code & 2) != 0;
779 rec.ExceptionInformation[1] = (DWORD)cr2;
781 rec.ExceptionCode = page_fault_code;
783 case T_ALIGNFLT: /* Alignment check exception */
784 /* FIXME: pass through exception handler first? */
785 if (context->EFlags & 0x00040000)
787 /* Disable AC flag, return */
788 context->EFlags &= ~0x00040000;
791 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
794 ERR( "Got unexpected trap %d\n", trap_code );
796 case T_NMI: /* NMI interrupt */
797 case T_DNA: /* Device not available exception */
798 case T_DOUBLEFLT: /* Double fault exception */
799 case T_TSSFLT: /* Invalid TSS exception */
800 case T_RESERVED: /* Unknown exception */
801 case T_MCHK: /* Machine check exception */
803 case T_CACHEFLT: /* Cache flush exception */
805 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
808 EXC_RtlRaiseException( &rec, context );
812 /**********************************************************************
815 * Implementation of SIGTRAP handler.
817 static void do_trap( CONTEXT *context, int trap_code )
819 EXCEPTION_RECORD rec;
821 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
822 rec.ExceptionRecord = NULL;
823 rec.ExceptionAddress = (LPVOID)context->Eip;
824 rec.NumberParameters = 0;
828 case T_TRCTRAP: /* Single-step exception */
829 if (context->EFlags & 0x100)
831 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
832 context->EFlags &= ~0x100; /* clear single-step flag */
836 /* likely we get this because of a kill(SIGTRAP) on ourself,
837 * so send a bp exception instead of a single step exception
839 TRACE("Spurious single step trap => breakpoint simulation\n");
840 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
843 case T_BPTFLT: /* Breakpoint exception */
844 rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
847 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
850 EXC_RtlRaiseException( &rec, context );
854 /**********************************************************************
857 * Implementation of SIGFPE handler
859 static void do_fpe( CONTEXT *context, int trap_code )
861 EXCEPTION_RECORD rec;
865 case T_DIVIDE: /* Division by zero exception */
866 rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
868 case T_FPOPFLT: /* Coprocessor segment overrun */
869 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
871 case T_ARITHTRAP: /* Floating point exception */
872 case T_UNKNOWN: /* Unknown fault code */
873 rec.ExceptionCode = get_fpu_code( context );
876 ERR( "Got unexpected trap %d\n", trap_code );
877 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
880 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
881 rec.ExceptionRecord = NULL;
882 rec.ExceptionAddress = (LPVOID)context->Eip;
883 rec.NumberParameters = 0;
884 EXC_RtlRaiseException( &rec, context );
889 /**********************************************************************
892 * Handler for SIGUSR2, which we use to set the vm86 pending flag.
894 static void set_vm86_pend( CONTEXT *context )
896 EXCEPTION_RECORD rec;
897 TEB *teb = NtCurrentTeb();
898 struct vm86plus_struct *vm86 = (struct vm86plus_struct*)(teb->vm86_ptr);
900 rec.ExceptionCode = EXCEPTION_VM86_STI;
901 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
902 rec.ExceptionRecord = NULL;
903 rec.NumberParameters = 1;
904 rec.ExceptionInformation[0] = 0;
906 /* __wine_enter_vm86() merges the vm86_pending flag in safely */
907 teb->vm86_pending |= VIP_MASK;
908 /* see if we were in VM86 mode */
909 if (context->EFlags & 0x00020000)
911 /* seems so, also set flag in signal context */
912 if (context->EFlags & VIP_MASK) return;
913 context->EFlags |= VIP_MASK;
914 vm86->regs.eflags |= VIP_MASK; /* no exception recursion */
915 if (context->EFlags & VIF_MASK) {
916 /* VIF is set, throw exception */
917 teb->vm86_pending = 0;
918 teb->vm86_ptr = NULL;
919 rec.ExceptionAddress = (LPVOID)context->Eip;
920 EXC_RtlRaiseException( &rec, context );
921 teb->vm86_ptr = vm86;
926 /* not in VM86, but possibly setting up for it */
927 if (vm86->regs.eflags & VIP_MASK) return;
928 vm86->regs.eflags |= VIP_MASK;
929 if (((char*)context->Eip >= (char*)vm86_return) &&
930 ((char*)context->Eip <= (char*)vm86_return_end) &&
931 (VM86_TYPE(context->Eax) != VM86_SIGNAL)) {
932 /* exiting from VM86, can't throw */
935 if (vm86->regs.eflags & VIF_MASK) {
936 /* VIF is set, throw exception */
938 teb->vm86_pending = 0;
939 teb->vm86_ptr = NULL;
940 save_vm86_context( &vcontext, vm86 );
941 rec.ExceptionAddress = (LPVOID)vcontext.Eip;
942 EXC_RtlRaiseException( &rec, &vcontext );
943 teb->vm86_ptr = vm86;
944 restore_vm86_context( &vcontext, vm86 );
950 /**********************************************************************
953 * Handler for SIGUSR2.
954 * We use it to signal that the running __wine_enter_vm86() should
955 * immediately set VIP_MASK, causing pending events to be handled
956 * as early as possible.
958 static HANDLER_DEF(usr2_handler)
962 save_context( &context, HANDLER_CONTEXT );
963 set_vm86_pend( &context );
964 restore_context( &context, HANDLER_CONTEXT );
968 /**********************************************************************
971 * Handler for SIGALRM.
972 * Increases the alarm counter and sets the vm86 pending flag.
974 static HANDLER_DEF(alrm_handler)
978 save_context( &context, HANDLER_CONTEXT );
979 NtCurrentTeb()->alarms++;
980 set_vm86_pend( &context );
981 restore_context( &context, HANDLER_CONTEXT );
983 #endif /* __HAVE_VM86 */
986 /**********************************************************************
989 * Handler for SIGSEGV and related errors.
991 static HANDLER_DEF(segv_handler)
994 save_context( &context, HANDLER_CONTEXT );
995 do_segv( &context, get_trap_code(HANDLER_CONTEXT),
996 get_cr2_value(HANDLER_CONTEXT), get_error_code(HANDLER_CONTEXT) );
997 restore_context( &context, HANDLER_CONTEXT );
1001 /**********************************************************************
1004 * Handler for SIGTRAP.
1006 static HANDLER_DEF(trap_handler)
1009 save_context( &context, HANDLER_CONTEXT );
1010 do_trap( &context, get_trap_code(HANDLER_CONTEXT) );
1011 restore_context( &context, HANDLER_CONTEXT );
1015 /**********************************************************************
1018 * Handler for SIGFPE.
1020 static HANDLER_DEF(fpe_handler)
1023 save_fpu( &context, HANDLER_CONTEXT );
1024 save_context( &context, HANDLER_CONTEXT );
1025 do_fpe( &context, get_trap_code(HANDLER_CONTEXT) );
1026 restore_context( &context, HANDLER_CONTEXT );
1027 restore_fpu( &context, HANDLER_CONTEXT );
1031 /**********************************************************************
1034 * Handler for SIGINT.
1036 static HANDLER_DEF(int_handler)
1038 if (!dispatch_signal(SIGINT))
1040 EXCEPTION_RECORD rec;
1043 save_context( &context, HANDLER_CONTEXT );
1044 rec.ExceptionCode = CONTROL_C_EXIT;
1045 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1046 rec.ExceptionRecord = NULL;
1047 rec.ExceptionAddress = (LPVOID)context.Eip;
1048 rec.NumberParameters = 0;
1049 EXC_RtlRaiseException( &rec, &context );
1050 restore_context( &context, HANDLER_CONTEXT );
1054 /**********************************************************************
1057 * Handler for SIGABRT.
1059 static HANDLER_DEF(abrt_handler)
1061 EXCEPTION_RECORD rec;
1064 save_context( &context, HANDLER_CONTEXT );
1065 rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
1066 rec.ExceptionFlags = EH_NONCONTINUABLE;
1067 rec.ExceptionRecord = NULL;
1068 rec.ExceptionAddress = (LPVOID)context.Eip;
1069 rec.NumberParameters = 0;
1070 EXC_RtlRaiseException( &rec, &context ); /* Should never return.. */
1071 restore_context( &context, HANDLER_CONTEXT );
1075 /***********************************************************************
1078 * Set a signal handler
1080 static int set_handler( int sig, int have_sigaltstack, void (*func)() )
1082 struct sigaction sig_act;
1085 if (!have_sigaltstack && NtCurrentTeb()->signal_stack)
1087 struct kernel_sigaction sig_act;
1088 sig_act.ksa_handler = func;
1089 sig_act.ksa_flags = SA_RESTART;
1090 sig_act.ksa_mask = (1 << (SIGINT-1)) |
1091 (1 << (SIGUSR2-1)) |
1093 /* point to the top of the stack */
1094 sig_act.ksa_restorer = (char *)NtCurrentTeb()->signal_stack + SIGNAL_STACK_SIZE;
1095 return wine_sigaction( sig, &sig_act, NULL );
1098 sig_act.sa_handler = func;
1099 sigemptyset( &sig_act.sa_mask );
1100 sigaddset( &sig_act.sa_mask, SIGINT );
1101 sigaddset( &sig_act.sa_mask, SIGUSR2 );
1102 sigaddset( &sig_act.sa_mask, SIGALRM );
1105 sig_act.sa_flags = SA_RESTART;
1106 #elif defined (__svr4__) || defined(_SCO_DS)
1107 sig_act.sa_flags = SA_SIGINFO | SA_RESTART;
1109 sig_act.sa_flags = 0;
1113 if (have_sigaltstack) sig_act.sa_flags |= SA_ONSTACK;
1115 return sigaction( sig, &sig_act, NULL );
1119 /***********************************************************************
1120 * __wine_set_signal_handler (NTDLL.@)
1122 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
1124 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
1125 if (handlers[sig] != NULL) return -2;
1126 handlers[sig] = wsh;
1131 /**********************************************************************
1134 BOOL SIGNAL_Init(void)
1136 int have_sigaltstack = 0;
1138 #ifdef HAVE_SIGALTSTACK
1139 struct sigaltstack ss;
1140 if ((ss.ss_sp = NtCurrentTeb()->signal_stack))
1142 ss.ss_size = SIGNAL_STACK_SIZE;
1144 if (!sigaltstack(&ss, NULL)) have_sigaltstack = 1;
1146 /* sigaltstack may fail because the kernel is too old, or
1147 because glibc is brain-dead. In the latter case a
1148 direct system call should succeed. */
1149 else if (!wine_sigaltstack(&ss, NULL)) have_sigaltstack = 1;
1152 #endif /* HAVE_SIGALTSTACK */
1154 sigfillset( &all_sigs );
1156 if (set_handler( SIGINT, have_sigaltstack, (void (*)())int_handler ) == -1) goto error;
1157 if (set_handler( SIGFPE, have_sigaltstack, (void (*)())fpe_handler ) == -1) goto error;
1158 if (set_handler( SIGSEGV, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
1159 if (set_handler( SIGILL, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
1160 if (set_handler( SIGABRT, have_sigaltstack, (void (*)())abrt_handler ) == -1) goto error;
1162 if (set_handler( SIGBUS, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
1165 if (set_handler( SIGTRAP, have_sigaltstack, (void (*)())trap_handler ) == -1) goto error;
1169 if (set_handler( SIGALRM, have_sigaltstack, (void (*)())alrm_handler ) == -1) goto error;
1170 if (set_handler( SIGUSR2, have_sigaltstack, (void (*)())usr2_handler ) == -1) goto error;
1176 perror("sigaction");
1181 /**********************************************************************
1184 void SIGNAL_Reset(void)
1188 /* block the async signals */
1189 sigemptyset( &block_set );
1190 sigaddset( &block_set, SIGALRM );
1191 sigaddset( &block_set, SIGIO );
1192 sigaddset( &block_set, SIGHUP );
1193 sigaddset( &block_set, SIGUSR2 );
1194 sigprocmask( SIG_BLOCK, &block_set, NULL );
1196 /* restore default handlers */
1197 signal( SIGINT, SIG_DFL );
1198 signal( SIGFPE, SIG_DFL );
1199 signal( SIGSEGV, SIG_DFL );
1200 signal( SIGILL, SIG_DFL );
1202 signal( SIGBUS, SIG_DFL );
1205 signal( SIGTRAP, SIG_DFL );
1211 /**********************************************************************
1212 * __wine_enter_vm86 (NTDLL.@)
1214 * Enter vm86 mode with the specified register context.
1216 void __wine_enter_vm86( CONTEXT *context )
1218 EXCEPTION_RECORD rec;
1219 TEB *teb = NtCurrentTeb();
1221 struct vm86plus_struct vm86;
1223 memset( &vm86, 0, sizeof(vm86) );
1226 restore_vm86_context( context, &vm86 );
1227 /* Linux doesn't preserve pending flag (VIP_MASK) on return,
1228 * so save it on entry, just in case */
1229 teb->vm86_pending |= (context->EFlags & VIP_MASK);
1230 /* Work around race conditions with signal handler
1231 * (avoiding sigprocmask for performance reasons) */
1232 teb->vm86_ptr = &vm86;
1233 vm86.regs.eflags |= teb->vm86_pending;
1234 /* Check for VIF|VIP here, since vm86_enter doesn't */
1235 if ((vm86.regs.eflags & (VIF_MASK|VIP_MASK)) == (VIF_MASK|VIP_MASK)) {
1236 teb->vm86_ptr = NULL;
1237 teb->vm86_pending = 0;
1238 context->EFlags |= VIP_MASK;
1239 rec.ExceptionCode = EXCEPTION_VM86_STI;
1240 rec.ExceptionInformation[0] = 0;
1246 res = vm86_enter( &teb->vm86_ptr ); /* uses and clears teb->vm86_ptr */
1252 } while (VM86_TYPE(res) == VM86_SIGNAL);
1254 save_vm86_context( context, &vm86 );
1255 context->EFlags |= teb->vm86_pending;
1257 switch(VM86_TYPE(res))
1259 case VM86_UNKNOWN: /* unhandled GP fault - IO-instruction or similar */
1260 do_segv( context, T_PROTFLT, 0, 0 );
1262 case VM86_TRAP: /* return due to DOS-debugger request */
1263 do_trap( context, VM86_ARG(res) );
1265 case VM86_INTx: /* int3/int x instruction (ARG = x) */
1266 rec.ExceptionCode = EXCEPTION_VM86_INTx;
1268 case VM86_STI: /* sti/popf/iret instruction enabled virtual interrupts */
1269 teb->vm86_pending = 0;
1270 rec.ExceptionCode = EXCEPTION_VM86_STI;
1272 case VM86_PICRETURN: /* return due to pending PIC request */
1273 rec.ExceptionCode = EXCEPTION_VM86_PICRETURN;
1276 ERR( "unhandled result from vm86 mode %x\n", res );
1279 rec.ExceptionInformation[0] = VM86_ARG(res);
1281 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1282 rec.ExceptionRecord = NULL;
1283 rec.ExceptionAddress = (LPVOID)context->Eip;
1284 rec.NumberParameters = 1;
1285 EXC_RtlRaiseException( &rec, context );
1289 #else /* __HAVE_VM86 */
1290 /**********************************************************************
1291 * __wine_enter_vm86 (NTDLL.@)
1293 void __wine_enter_vm86( CONTEXT *context )
1295 MESSAGE("vm86 mode not supported on this platform\n");
1297 #endif /* __HAVE_VM86 */
1299 /**********************************************************************
1300 * DbgBreakPoint (NTDLL.@)
1302 __ASM_GLOBAL_FUNC( DbgBreakPoint, "int $3; ret");
1304 /**********************************************************************
1305 * DbgUserBreakPoint (NTDLL.@)
1307 __ASM_GLOBAL_FUNC( DbgUserBreakPoint, "int $3; ret");
1309 #endif /* __i386__ */