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>
57 #include "wine/library.h"
58 #include "wine/exception.h"
59 #include "ntdll_misc.h"
60 #include "wine/debug.h"
62 WINE_DEFAULT_DEBUG_CHANNEL(seh);
65 /***********************************************************************
66 * 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 /* All Registers access - only for local access */
76 # define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
79 /* Gpr Registers access */
80 # define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
82 # define IAR_sig(context) REG_sig(nip, context) /* Program counter */
83 # define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */
84 # define CTR_sig(context) REG_sig(ctr, context) /* Count register */
86 # define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */
87 # define LR_sig(context) REG_sig(link, context) /* Link register */
88 # define CR_sig(context) REG_sig(ccr, context) /* Condition register */
90 /* Float Registers access */
91 # define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
93 # define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
95 /* Exception Registers access */
96 # define DAR_sig(context) REG_sig(dar, context)
97 # define DSISR_sig(context) REG_sig(dsisr, context)
98 # define TRAP_sig(context) REG_sig(trap, context)
104 # include <sys/ucontext.h>
106 # include <sys/types.h>
108 typedef siginfo_t siginfo;
110 typedef struct ucontext SIGCONTEXT;
113 # define HANDLER_DEF(name) void name( int __signal, siginfo *__siginfo, SIGCONTEXT *__context )
114 # define HANDLER_CONTEXT (__context)
116 /* All Registers access - only for local access */
117 # define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
118 # define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
119 # define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
120 # define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
122 /* Gpr Registers access */
123 # define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
125 # define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
126 # define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
127 # define CTR_sig(context) REG_sig(ctr, context)
129 # define XER_sig(context) REG_sig(xer, context) /* Link register */
130 # define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
131 # define CR_sig(context) REG_sig(cr, context) /* Condition register */
133 /* Float Registers access */
134 # define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
136 # define FPSCR_sig(context) FLOATREG_sig(fpscr, context)
138 /* Exception Registers access */
139 # define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
140 # define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
141 # define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
143 /* Signal defs : Those are undefined on darwin
160 #endif /* __APPLE__ */
164 typedef int (*wine_signal_handler)(unsigned int sig);
166 static wine_signal_handler handlers[256];
168 /***********************************************************************
171 inline static int dispatch_signal(unsigned int sig)
173 if (handlers[sig] == NULL) return 0;
174 return handlers[sig](sig);
177 /***********************************************************************
180 * Set the register values from a sigcontext.
182 static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
185 #define C(x) context->Gpr##x = GPR_sig(x,sigcontext)
186 /* Save Gpr registers */
187 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
188 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
189 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
193 context->Iar = IAR_sig(sigcontext); /* Program Counter */
194 context->Msr = MSR_sig(sigcontext); /* Machine State Register (Supervisor) */
195 context->Ctr = CTR_sig(sigcontext);
197 context->Xer = XER_sig(sigcontext);
198 context->Lr = LR_sig(sigcontext);
199 context->Cr = CR_sig(sigcontext);
201 /* Saving Exception regs */
202 context->Dar = DAR_sig(sigcontext);
203 context->Dsisr = DSISR_sig(sigcontext);
204 context->Trap = TRAP_sig(sigcontext);
208 /***********************************************************************
211 * Build a sigcontext from the register values.
213 static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
216 #define C(x) GPR_sig(x,sigcontext) = context->Gpr##x
217 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
218 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
219 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
223 IAR_sig(sigcontext) = context->Iar; /* Program Counter */
224 MSR_sig(sigcontext) = context->Msr; /* Machine State Register (Supervisor) */
225 CTR_sig(sigcontext) = context->Ctr;
227 XER_sig(sigcontext) = context->Xer;
228 LR_sig(sigcontext) = context->Lr;
229 CR_sig(sigcontext) = context->Cr;
231 /* Setting Exception regs */
232 DAR_sig(sigcontext) = context->Dar;
233 DSISR_sig(sigcontext) = context->Dsisr;
234 TRAP_sig(sigcontext) = context->Trap;
238 /***********************************************************************
241 * Set the FPU context from a sigcontext.
243 inline static void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
245 #define C(x) context->Fpr##x = FLOAT_sig(x,sigcontext)
246 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
247 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
248 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
251 context->Fpscr = FPSCR_sig(sigcontext);
255 /***********************************************************************
258 * Restore the FPU context to a sigcontext.
260 inline static void restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
262 #define C(x) FLOAT_sig(x,sigcontext) = context->Fpr##x
263 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
264 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
265 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
268 FPSCR_sig(sigcontext) = context->Fpscr;
272 /**********************************************************************
275 * Get the FPU exception code from the FPU status.
277 static inline DWORD get_fpu_code( const CONTEXT *context )
279 DWORD status = context->Fpscr;
281 if (status & 0x01) /* IE */
283 if (status & 0x40) /* SF */
284 return EXCEPTION_FLT_STACK_CHECK;
286 return EXCEPTION_FLT_INVALID_OPERATION;
288 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
289 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
290 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
291 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
292 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
293 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
296 /**********************************************************************
299 * Implementation of SIGSEGV handler.
301 static void do_segv( CONTEXT *context, int trap, int err, int code, void * addr )
303 EXCEPTION_RECORD rec;
304 DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
306 rec.ExceptionRecord = NULL;
307 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
308 rec.ExceptionAddress = addr;
309 rec.NumberParameters = 0;
313 switch ( code & 0xffff ) {
316 rec.NumberParameters = 2;
317 rec.ExceptionInformation[0] = 0; /* FIXME ? */
318 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
319 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
321 rec.ExceptionCode = page_fault_code;
323 default:FIXME("Unhandled SIGSEGV/%x\n",code);
328 switch ( code & 0xffff ) {
330 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
337 /* FIXME: correct for all cases ? */
338 rec.NumberParameters = 2;
339 rec.ExceptionInformation[0] = 0; /* FIXME ? */
340 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
341 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
343 rec.ExceptionCode = page_fault_code;
346 default:FIXME("Unhandled SIGBUS/%x\n",code);
351 switch ( code & 0xffff ) {
352 case ILL_ILLOPC: /* illegal opcode */
354 case ILL_ILLOPN: /* illegal operand */
357 case ILL_ILLADR: /* illegal addressing mode */
360 case ILL_ILLTRP: /* illegal trap */
363 case ILL_COPROC: /* coprocessor error */
365 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
367 case ILL_PRVOPC: /* privileged opcode */
369 case ILL_PRVREG: /* privileged register */
371 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
374 case ILL_BADSTK: /* internal stack error */
375 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
378 default:FIXME("Unhandled SIGILL/%x\n", code);
383 __regs_RtlRaiseException( &rec, context );
386 /**********************************************************************
389 * Implementation of SIGTRAP handler.
391 static void do_trap( CONTEXT *context, int code, void * addr )
393 EXCEPTION_RECORD rec;
395 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
396 rec.ExceptionRecord = NULL;
397 rec.ExceptionAddress = addr;
398 rec.NumberParameters = 0;
400 /* FIXME: check if we might need to modify PC */
401 switch (code & 0xffff) {
404 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
409 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
412 default:FIXME("Unhandled SIGTRAP/%x\n", code);
415 __regs_RtlRaiseException( &rec, context );
418 /**********************************************************************
421 * Implementation of SIGFPE handler.
423 static void do_fpe( CONTEXT *context, int code, void * addr )
425 EXCEPTION_RECORD rec;
427 switch ( code & 0xffff ) {
430 rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
435 rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
440 rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
445 rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
450 rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
455 rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
460 rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
467 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
470 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
471 rec.ExceptionRecord = NULL;
472 rec.ExceptionAddress = addr;
473 rec.NumberParameters = 0;
474 __regs_RtlRaiseException( &rec, context );
477 /**********************************************************************
480 * Handler for SIGSEGV and related errors.
482 static HANDLER_DEF(segv_handler)
485 save_context( &context, HANDLER_CONTEXT );
486 do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
487 restore_context( &context, HANDLER_CONTEXT );
490 /**********************************************************************
493 * Handler for SIGTRAP.
495 static HANDLER_DEF(trap_handler)
498 save_context( &context, HANDLER_CONTEXT );
499 do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
500 restore_context( &context, HANDLER_CONTEXT );
503 /**********************************************************************
506 * Handler for SIGFPE.
508 static HANDLER_DEF(fpe_handler)
511 save_fpu( &context, HANDLER_CONTEXT );
512 save_context( &context, HANDLER_CONTEXT );
513 do_fpe( &context, __siginfo->si_code, __siginfo->si_addr );
514 restore_context( &context, HANDLER_CONTEXT );
515 restore_fpu( &context, HANDLER_CONTEXT );
518 /**********************************************************************
521 * Handler for SIGINT.
523 static HANDLER_DEF(int_handler)
525 if (!dispatch_signal(SIGINT))
527 EXCEPTION_RECORD rec;
530 save_context( &context, HANDLER_CONTEXT );
531 rec.ExceptionCode = CONTROL_C_EXIT;
532 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
533 rec.ExceptionRecord = NULL;
534 rec.ExceptionAddress = (LPVOID)context.Iar;
535 rec.NumberParameters = 0;
536 __regs_RtlRaiseException( &rec, &context );
537 restore_context( &context, HANDLER_CONTEXT );
542 /**********************************************************************
545 * Handler for SIGABRT.
547 static HANDLER_DEF(abrt_handler)
549 EXCEPTION_RECORD rec;
552 save_context( &context, HANDLER_CONTEXT );
553 rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
554 rec.ExceptionFlags = EH_NONCONTINUABLE;
555 rec.ExceptionRecord = NULL;
556 rec.ExceptionAddress = (LPVOID)context.Iar;
557 rec.NumberParameters = 0;
558 __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
559 restore_context( &context, HANDLER_CONTEXT );
563 /**********************************************************************
566 * Handler for SIGTERM.
568 static HANDLER_DEF(term_handler)
570 server_abort_thread(0);
574 /**********************************************************************
577 * Handler for SIGUSR1, used to signal a thread that it got suspended.
579 static HANDLER_DEF(usr1_handler)
581 LARGE_INTEGER timeout;
583 /* wait with 0 timeout, will only return once the thread is no longer suspended */
584 timeout.QuadPart = 0;
585 NTDLL_wait_for_multiple_objects( 0, NULL, 0, &timeout, 0 );
589 /***********************************************************************
592 * Set a signal handler
594 static int set_handler( int sig, void (*func)() )
596 struct sigaction sig_act;
598 sig_act.sa_sigaction = func;
599 sigemptyset( &sig_act.sa_mask );
600 sigaddset( &sig_act.sa_mask, SIGINT );
601 sigaddset( &sig_act.sa_mask, SIGALRM );
603 sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
604 return sigaction( sig, &sig_act, NULL );
608 /***********************************************************************
609 * __wine_set_signal_handler (NTDLL.@)
611 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
613 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
614 if (handlers[sig] != NULL) return -2;
620 /**********************************************************************
623 BOOL SIGNAL_Init(void)
625 if (set_handler( SIGINT, (void (*)())int_handler ) == -1) goto error;
626 if (set_handler( SIGFPE, (void (*)())fpe_handler ) == -1) goto error;
627 if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
628 if (set_handler( SIGILL, (void (*)())segv_handler ) == -1) goto error;
629 if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
630 if (set_handler( SIGTERM, (void (*)())term_handler ) == -1) goto error;
631 if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
633 if (set_handler( SIGBUS, (void (*)())segv_handler ) == -1) goto error;
636 if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
647 /**********************************************************************
648 * __wine_enter_vm86 (NTDLL.@)
650 void __wine_enter_vm86( CONTEXT *context )
652 MESSAGE("vm86 mode not supported on this platform\n");
655 /**********************************************************************
656 * DbgBreakPoint (NTDLL.@)
658 void WINAPI DbgBreakPoint(void)
660 kill(getpid(), SIGTRAP);
663 /**********************************************************************
664 * DbgUserBreakPoint (NTDLL.@)
666 void WINAPI DbgUserBreakPoint(void)
668 kill(getpid(), SIGTRAP);
671 #endif /* __powerpc__ */