2 * PowerPC signal handling routines
4 * Copyright 2002 Marcus Meissner, SuSE Linux AG
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"
35 #ifdef HAVE_SYS_PARAM_H
36 # include <sys/param.h>
41 # ifdef HAVE_SYS_SYSCALL_H
42 # include <sys/syscall.h>
46 #ifdef HAVE_SYS_VM86_H
47 # include <sys/vm86.h>
50 #ifdef HAVE_SYS_SIGNAL_H
51 # include <sys/signal.h>
56 #include "wine/library.h"
57 #include "wine/exception.h"
58 #include "ntdll_misc.h"
59 #include "wine/debug.h"
61 WINE_DEFAULT_DEBUG_CHANNEL(seh);
64 /***********************************************************************
65 * signal context platform-specific definitions
69 typedef struct ucontext SIGCONTEXT;
71 # define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, SIGCONTEXT *__context )
72 # define HANDLER_CONTEXT (__context)
74 /* All Registers access - only for local access */
75 # define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
78 /* Gpr Registers access */
79 # define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
81 # define IAR_sig(context) REG_sig(nip, context) /* Program counter */
82 # define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */
83 # define CTR_sig(context) REG_sig(ctr, context) /* Count register */
85 # define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */
86 # define LR_sig(context) REG_sig(link, context) /* Link register */
87 # define CR_sig(context) REG_sig(ccr, context) /* Condition register */
89 /* Float Registers access */
90 # define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
92 # define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
94 /* Exception Registers access */
95 # define DAR_sig(context) REG_sig(dar, context)
96 # define DSISR_sig(context) REG_sig(dsisr, context)
97 # define TRAP_sig(context) REG_sig(trap, context)
103 # include <sys/ucontext.h>
105 # include <sys/types.h>
107 typedef siginfo_t siginfo;
109 typedef struct ucontext SIGCONTEXT;
112 # define HANDLER_DEF(name) void name( int __signal, siginfo *__siginfo, SIGCONTEXT *__context )
113 # define HANDLER_CONTEXT (__context)
115 /* All Registers access - only for local access */
116 # define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
117 # define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
118 # define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
119 # define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
121 /* Gpr Registers access */
122 # define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
124 # define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
125 # define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
126 # define CTR_sig(context) REG_sig(ctr, context)
128 # define XER_sig(context) REG_sig(xer, context) /* Link register */
129 # define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
130 # define CR_sig(context) REG_sig(cr, context) /* Condition register */
132 /* Float Registers access */
133 # define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
135 # define FPSCR_sig(context) FLOATREG_sig(fpscr, context)
137 /* Exception Registers access */
138 # define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
139 # define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
140 # define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
142 /* Signal defs : Those are undefined on darwin
159 #endif /* __APPLE__ */
163 typedef int (*wine_signal_handler)(unsigned int sig);
165 static wine_signal_handler handlers[256];
167 /***********************************************************************
170 inline static int dispatch_signal(unsigned int sig)
172 if (handlers[sig] == NULL) return 0;
173 return handlers[sig](sig);
176 /***********************************************************************
179 * Set the register values from a sigcontext.
181 static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
184 #define C(x) context->Gpr##x = GPR_sig(x,sigcontext)
185 /* Save Gpr registers */
186 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
187 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
188 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
192 context->Iar = IAR_sig(sigcontext); /* Program Counter */
193 context->Msr = MSR_sig(sigcontext); /* Machine State Register (Supervisor) */
194 context->Ctr = CTR_sig(sigcontext);
196 context->Xer = XER_sig(sigcontext);
197 context->Lr = LR_sig(sigcontext);
198 context->Cr = CR_sig(sigcontext);
200 /* Saving Exception regs */
201 context->Dar = DAR_sig(sigcontext);
202 context->Dsisr = DSISR_sig(sigcontext);
203 context->Trap = TRAP_sig(sigcontext);
207 /***********************************************************************
210 * Build a sigcontext from the register values.
212 static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
215 #define C(x) GPR_sig(x,sigcontext) = context->Gpr##x
216 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
217 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
218 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
222 IAR_sig(sigcontext) = context->Iar; /* Program Counter */
223 MSR_sig(sigcontext) = context->Msr; /* Machine State Register (Supervisor) */
224 CTR_sig(sigcontext) = context->Ctr;
226 XER_sig(sigcontext) = context->Xer;
227 LR_sig(sigcontext) = context->Lr;
228 CR_sig(sigcontext) = context->Cr;
230 /* Setting Exception regs */
231 DAR_sig(sigcontext) = context->Dar;
232 DSISR_sig(sigcontext) = context->Dsisr;
233 TRAP_sig(sigcontext) = context->Trap;
237 /***********************************************************************
240 * Set the FPU context from a sigcontext.
242 inline static void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
244 #define C(x) context->Fpr##x = FLOAT_sig(x,sigcontext)
245 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
246 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
247 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
250 context->Fpscr = FPSCR_sig(sigcontext);
254 /***********************************************************************
257 * Restore the FPU context to a sigcontext.
259 inline static void restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
261 #define C(x) FLOAT_sig(x,sigcontext) = context->Fpr##x
262 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
263 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
264 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
267 FPSCR_sig(sigcontext) = context->Fpscr;
271 /**********************************************************************
274 * Get the FPU exception code from the FPU status.
276 static inline DWORD get_fpu_code( const CONTEXT *context )
278 DWORD status = context->Fpscr;
280 if (status & 0x01) /* IE */
282 if (status & 0x40) /* SF */
283 return EXCEPTION_FLT_STACK_CHECK;
285 return EXCEPTION_FLT_INVALID_OPERATION;
287 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
288 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
289 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
290 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
291 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
292 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
295 /**********************************************************************
298 * Implementation of SIGSEGV handler.
300 static void do_segv( CONTEXT *context, int trap, int err, int code, void * addr )
302 EXCEPTION_RECORD rec;
303 DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
305 rec.ExceptionRecord = NULL;
306 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
307 rec.ExceptionAddress = addr;
308 rec.NumberParameters = 0;
312 switch ( code & 0xffff ) {
315 rec.NumberParameters = 2;
316 rec.ExceptionInformation[0] = 0; /* FIXME ? */
317 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
318 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
320 rec.ExceptionCode = page_fault_code;
322 default:FIXME("Unhandled SIGSEGV/%x\n",code);
327 switch ( code & 0xffff ) {
329 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
336 /* FIXME: correct for all cases ? */
337 rec.NumberParameters = 2;
338 rec.ExceptionInformation[0] = 0; /* FIXME ? */
339 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
340 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
342 rec.ExceptionCode = page_fault_code;
345 default:FIXME("Unhandled SIGBUS/%x\n",code);
350 switch ( code & 0xffff ) {
351 case ILL_ILLOPC: /* illegal opcode */
353 case ILL_ILLOPN: /* illegal operand */
356 case ILL_ILLADR: /* illegal addressing mode */
359 case ILL_ILLTRP: /* illegal trap */
362 case ILL_COPROC: /* coprocessor error */
364 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
366 case ILL_PRVOPC: /* privileged opcode */
368 case ILL_PRVREG: /* privileged register */
370 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
373 case ILL_BADSTK: /* internal stack error */
374 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
377 default:FIXME("Unhandled SIGILL/%x\n", code);
382 __regs_RtlRaiseException( &rec, context );
385 /**********************************************************************
388 * Implementation of SIGTRAP handler.
390 static void do_trap( CONTEXT *context, int code, void * addr )
392 EXCEPTION_RECORD rec;
394 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
395 rec.ExceptionRecord = NULL;
396 rec.ExceptionAddress = addr;
397 rec.NumberParameters = 0;
399 /* FIXME: check if we might need to modify PC */
400 switch (code & 0xffff) {
403 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
408 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
411 default:FIXME("Unhandled SIGTRAP/%x\n", code);
414 __regs_RtlRaiseException( &rec, context );
417 /**********************************************************************
420 * Implementation of SIGFPE handler.
422 static void do_fpe( CONTEXT *context, int code, void * addr )
424 EXCEPTION_RECORD rec;
426 switch ( code & 0xffff ) {
429 rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
434 rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
439 rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
444 rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
449 rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
454 rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
459 rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
466 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
469 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
470 rec.ExceptionRecord = NULL;
471 rec.ExceptionAddress = addr;
472 rec.NumberParameters = 0;
473 __regs_RtlRaiseException( &rec, context );
476 /**********************************************************************
479 * Handler for SIGSEGV and related errors.
481 static HANDLER_DEF(segv_handler)
484 save_context( &context, HANDLER_CONTEXT );
485 do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
486 restore_context( &context, HANDLER_CONTEXT );
489 /**********************************************************************
492 * Handler for SIGTRAP.
494 static HANDLER_DEF(trap_handler)
497 save_context( &context, HANDLER_CONTEXT );
498 do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
499 restore_context( &context, HANDLER_CONTEXT );
502 /**********************************************************************
505 * Handler for SIGFPE.
507 static HANDLER_DEF(fpe_handler)
510 save_fpu( &context, HANDLER_CONTEXT );
511 save_context( &context, HANDLER_CONTEXT );
512 do_fpe( &context, __siginfo->si_code, __siginfo->si_addr );
513 restore_context( &context, HANDLER_CONTEXT );
514 restore_fpu( &context, HANDLER_CONTEXT );
517 /**********************************************************************
520 * Handler for SIGINT.
522 static HANDLER_DEF(int_handler)
524 if (!dispatch_signal(SIGINT))
526 EXCEPTION_RECORD rec;
529 save_context( &context, HANDLER_CONTEXT );
530 rec.ExceptionCode = CONTROL_C_EXIT;
531 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
532 rec.ExceptionRecord = NULL;
533 rec.ExceptionAddress = (LPVOID)context.Iar;
534 rec.NumberParameters = 0;
535 __regs_RtlRaiseException( &rec, &context );
536 restore_context( &context, HANDLER_CONTEXT );
541 /**********************************************************************
544 * Handler for SIGABRT.
546 static HANDLER_DEF(abrt_handler)
548 EXCEPTION_RECORD rec;
551 save_context( &context, HANDLER_CONTEXT );
552 rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
553 rec.ExceptionFlags = EH_NONCONTINUABLE;
554 rec.ExceptionRecord = NULL;
555 rec.ExceptionAddress = (LPVOID)context.Iar;
556 rec.NumberParameters = 0;
557 __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
558 restore_context( &context, HANDLER_CONTEXT );
562 /**********************************************************************
565 * Handler for SIGTERM.
567 static HANDLER_DEF(term_handler)
569 server_abort_thread(0);
573 /**********************************************************************
576 * Handler for SIGUSR1, used to signal a thread that it got suspended.
578 static HANDLER_DEF(usr1_handler)
580 LARGE_INTEGER timeout;
582 /* wait with 0 timeout, will only return once the thread is no longer suspended */
583 timeout.QuadPart = 0;
584 NTDLL_wait_for_multiple_objects( 0, NULL, 0, &timeout, 0 );
588 /**********************************************************************
589 * get_signal_stack_total_size
591 * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
592 * Must be a power of two.
594 size_t get_signal_stack_total_size(void)
596 assert( sizeof(TEB) <= getpagesize() );
597 return getpagesize(); /* this is just for the TEB, we don't need a signal stack */
601 /***********************************************************************
604 * Set a signal handler
606 static int set_handler( int sig, void (*func)() )
608 struct sigaction sig_act;
610 sig_act.sa_sigaction = func;
611 sigemptyset( &sig_act.sa_mask );
612 sigaddset( &sig_act.sa_mask, SIGINT );
613 sigaddset( &sig_act.sa_mask, SIGALRM );
615 sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
616 return sigaction( sig, &sig_act, NULL );
620 /***********************************************************************
621 * __wine_set_signal_handler (NTDLL.@)
623 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
625 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
626 if (handlers[sig] != NULL) return -2;
632 /**********************************************************************
635 BOOL SIGNAL_Init(void)
637 if (set_handler( SIGINT, (void (*)())int_handler ) == -1) goto error;
638 if (set_handler( SIGFPE, (void (*)())fpe_handler ) == -1) goto error;
639 if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
640 if (set_handler( SIGILL, (void (*)())segv_handler ) == -1) goto error;
641 if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
642 if (set_handler( SIGTERM, (void (*)())term_handler ) == -1) goto error;
643 if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
645 if (set_handler( SIGBUS, (void (*)())segv_handler ) == -1) goto error;
648 if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
659 /**********************************************************************
660 * __wine_enter_vm86 (NTDLL.@)
662 void __wine_enter_vm86( CONTEXT *context )
664 MESSAGE("vm86 mode not supported on this platform\n");
667 /**********************************************************************
668 * DbgBreakPoint (NTDLL.@)
670 void WINAPI DbgBreakPoint(void)
672 kill(getpid(), SIGTRAP);
675 /**********************************************************************
676 * DbgUserBreakPoint (NTDLL.@)
678 void WINAPI DbgUserBreakPoint(void)
680 kill(getpid(), SIGTRAP);
683 #endif /* __powerpc__ */