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"
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"
56 #include "wine/exception.h"
57 #include "selectors.h"
58 #include "stackframe.h"
61 #include "wine/debug.h"
63 WINE_DEFAULT_DEBUG_CHANNEL(seh);
66 /***********************************************************************
67 * signal context platform-specific definitions
70 typedef struct ucontext SIGCONTEXT;
72 #define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, SIGCONTEXT *__context )
73 #define HANDLER_CONTEXT (__context)
75 typedef int (*wine_signal_handler)(unsigned int sig);
77 static wine_signal_handler handlers[256];
79 static sigset_t all_sigs;
82 /***********************************************************************
85 inline static int dispatch_signal(unsigned int sig)
87 if (handlers[sig] == NULL) return 0;
88 return handlers[sig](sig);
91 /***********************************************************************
94 * Set the register values from a sigcontext.
96 static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
98 #define CX(x,y) context->x = sigcontext->uc_mcontext.regs->y
99 #define C(x) CX(Gpr##x,gpr[x])
100 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
101 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
102 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
109 /* FIXME: fp regs? */
111 /* FIXME: missing pt_regs ...
125 /***********************************************************************
128 * Build a sigcontext from the register values.
130 static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
132 #define CX(x,y) sigcontext->uc_mcontext.regs->y = context->x
133 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
134 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
135 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
145 /***********************************************************************
148 * Set the FPU context from a sigcontext.
150 inline static void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
156 /***********************************************************************
159 * Restore the FPU context to a sigcontext.
161 inline static void restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
167 /**********************************************************************
170 * Get the FPU exception code from the FPU status.
172 static inline DWORD get_fpu_code( const CONTEXT *context )
174 DWORD status = 0 /* FIXME */;
176 if (status & 0x01) /* IE */
178 if (status & 0x40) /* SF */
179 return EXCEPTION_FLT_STACK_CHECK;
181 return EXCEPTION_FLT_INVALID_OPERATION;
183 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
184 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
185 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
186 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
187 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
188 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
192 /***********************************************************************
195 * Unblock signals. Called from EXC_RtlRaiseException.
197 void SIGNAL_Unblock( void )
199 sigprocmask( SIG_UNBLOCK, &all_sigs, NULL );
202 /**********************************************************************
205 * Handler for SIGSEGV and related errors.
207 static HANDLER_DEF(segv_handler)
210 EXCEPTION_RECORD rec;
211 DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
213 save_context( &context, HANDLER_CONTEXT );
215 rec.ExceptionRecord = NULL;
216 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
217 rec.ExceptionAddress = (LPVOID)HANDLER_CONTEXT->uc_mcontext.regs->nip;
218 rec.NumberParameters = 0;
219 switch (__siginfo->si_signo) {
221 switch ( __siginfo->si_code & 0xffff ) {
224 rec.NumberParameters = 2;
225 rec.ExceptionInformation[0] = 0; /* FIXME ? */
226 rec.ExceptionInformation[1] = (DWORD)__siginfo->si_addr;
227 if (!(page_fault_code=VIRTUAL_HandleFault(__siginfo->si_addr)))
229 rec.ExceptionCode = page_fault_code;
231 default:FIXME("Unhandled SIGSEGV/%x\n",__siginfo->si_code);
236 switch ( __siginfo->si_code & 0xffff ) {
238 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
242 /* FIXME: correct for all cases ? */
243 rec.NumberParameters = 2;
244 rec.ExceptionInformation[0] = 0; /* FIXME ? */
245 rec.ExceptionInformation[1] = (DWORD)__siginfo->si_addr;
246 if (!(page_fault_code=VIRTUAL_HandleFault(__siginfo->si_addr)))
248 rec.ExceptionCode = page_fault_code;
250 default:FIXME("Unhandled SIGBUS/%x\n",__siginfo->si_code);
255 switch ( __siginfo->si_code & 0xffff ) {
256 case ILL_ILLOPC: /* illegal opcode */
257 case ILL_ILLOPN: /* illegal operand */
258 case ILL_ILLADR: /* illegal addressing mode */
259 case ILL_ILLTRP: /* illegal trap */
260 case ILL_COPROC: /* coprocessor error */
261 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
263 case ILL_PRVOPC: /* privileged opcode */
264 case ILL_PRVREG: /* privileged register */
265 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
267 case ILL_BADSTK: /* internal stack error */
268 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
270 default:FIXME("Unhandled SIGILL/%x\n",__siginfo->si_code);
275 EXC_RtlRaiseException( &rec, &context );
276 restore_context( &context, HANDLER_CONTEXT );
279 /**********************************************************************
282 * Handler for SIGTRAP.
284 static HANDLER_DEF(trap_handler)
287 EXCEPTION_RECORD rec;
289 save_context( &context, HANDLER_CONTEXT );
291 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
292 rec.ExceptionRecord = NULL;
293 rec.ExceptionAddress = (LPVOID)__context->uc_mcontext.regs->nip;
294 rec.NumberParameters = 0;
296 /* FIXME: check if we might need to modify PC */
297 switch (__siginfo->si_code & 0xffff) {
299 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
302 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
305 EXC_RtlRaiseException( &rec, &context );
306 restore_context( &context, HANDLER_CONTEXT );
310 /**********************************************************************
313 * Handler for SIGFPE.
315 static HANDLER_DEF(fpe_handler)
318 EXCEPTION_RECORD rec;
320 /*save_fpu( &context, HANDLER_CONTEXT );*/
321 save_context( &context, HANDLER_CONTEXT );
323 switch ( __siginfo->si_code & 0xffff ) {
325 rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
328 rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
331 rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
334 rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
337 rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
340 rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
343 rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
347 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
350 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
351 rec.ExceptionRecord = NULL;
352 rec.ExceptionAddress = (LPVOID)__context->uc_mcontext.regs->nip;
353 rec.NumberParameters = 0;
354 EXC_RtlRaiseException( &rec, &context );
355 restore_context( &context, HANDLER_CONTEXT );
356 /*restore_fpu( &context, HANDLER_CONTEXT );*/
360 /**********************************************************************
363 * Handler for SIGINT.
365 static HANDLER_DEF(int_handler)
367 if (!dispatch_signal(SIGINT))
369 EXCEPTION_RECORD rec;
372 save_context( &context, HANDLER_CONTEXT );
373 rec.ExceptionCode = CONTROL_C_EXIT;
374 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
375 rec.ExceptionRecord = NULL;
376 rec.ExceptionAddress = (LPVOID)context.Iar;
377 rec.NumberParameters = 0;
378 EXC_RtlRaiseException( &rec, &context );
379 restore_context( &context, HANDLER_CONTEXT );
383 /**********************************************************************
386 * Handler for SIGABRT.
388 static HANDLER_DEF(abrt_handler)
390 EXCEPTION_RECORD rec;
393 save_context( &context, HANDLER_CONTEXT );
394 rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
395 rec.ExceptionFlags = EH_NONCONTINUABLE;
396 rec.ExceptionRecord = NULL;
397 rec.ExceptionAddress = (LPVOID)context.Iar;
398 rec.NumberParameters = 0;
399 EXC_RtlRaiseException( &rec, &context ); /* Should never return.. */
400 restore_context( &context, HANDLER_CONTEXT );
404 /***********************************************************************
407 * Set a signal handler
409 static int set_handler( int sig, int have_sigaltstack, void (*func)() )
411 struct sigaction sig_act;
413 sig_act.sa_sigaction = func;
414 sigemptyset( &sig_act.sa_mask );
415 sigaddset( &sig_act.sa_mask, SIGINT );
416 sigaddset( &sig_act.sa_mask, SIGALRM );
418 sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
421 if (have_sigaltstack) sig_act.sa_flags |= SA_ONSTACK;
423 return sigaction( sig, &sig_act, NULL );
427 /***********************************************************************
428 * __wine_set_signal_handler (NTDLL.@)
430 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
432 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
433 if (handlers[sig] != NULL) return -2;
439 /**********************************************************************
442 BOOL SIGNAL_Init(void)
444 int have_sigaltstack = 0;
446 #ifdef HAVE_SIGALTSTACK
447 struct sigaltstack ss;
448 if ((ss.ss_sp = NtCurrentTeb()->signal_stack))
450 ss.ss_size = SIGNAL_STACK_SIZE;
452 if (!sigaltstack(&ss, NULL)) have_sigaltstack = 1;
454 #endif /* HAVE_SIGALTSTACK */
456 sigfillset( &all_sigs );
458 if (set_handler( SIGINT, have_sigaltstack, (void (*)())int_handler ) == -1) goto error;
459 if (set_handler( SIGFPE, have_sigaltstack, (void (*)())fpe_handler ) == -1) goto error;
460 if (set_handler( SIGSEGV, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
461 if (set_handler( SIGILL, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
462 if (set_handler( SIGABRT, have_sigaltstack, (void (*)())abrt_handler ) == -1) goto error;
464 if (set_handler( SIGBUS, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
467 if (set_handler( SIGTRAP, have_sigaltstack, (void (*)())trap_handler ) == -1) goto error;
478 /**********************************************************************
481 void SIGNAL_Reset(void)
485 /* block the async signals */
486 sigemptyset( &block_set );
487 sigaddset( &block_set, SIGALRM );
488 sigaddset( &block_set, SIGIO );
489 sigaddset( &block_set, SIGHUP );
490 sigaddset( &block_set, SIGUSR2 );
491 sigprocmask( SIG_BLOCK, &block_set, NULL );
493 /* restore default handlers */
494 signal( SIGINT, SIG_DFL );
495 signal( SIGFPE, SIG_DFL );
496 signal( SIGSEGV, SIG_DFL );
497 signal( SIGILL, SIG_DFL );
499 signal( SIGBUS, SIG_DFL );
502 signal( SIGTRAP, SIG_DFL );
506 /**********************************************************************
507 * __wine_enter_vm86 (NTDLL.@)
509 void __wine_enter_vm86( CONTEXT *context )
511 MESSAGE("vm86 mode not supported on this platform\n");
514 /**********************************************************************
515 * DbgBreakPoint (NTDLL.@)
517 void WINAPI DbgBreakPoint(void)
519 kill(getpid(), SIGTRAP);
522 /**********************************************************************
523 * DbgUserBreakPoint (NTDLL.@)
525 void WINAPI DbgUserBreakPoint(void)
527 kill(getpid(), SIGTRAP);
530 #endif /* __powerpc__ */