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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 static inline 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 static inline 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 static inline 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 context of the current thread.
276 void get_cpu_context( CONTEXT *context )
278 FIXME("not implemented\n");
282 /***********************************************************************
285 * Set the new CPU context.
287 void set_cpu_context( const CONTEXT *context )
289 FIXME("not implemented\n");
293 /**********************************************************************
296 * Get the FPU exception code from the FPU status.
298 static inline DWORD get_fpu_code( const CONTEXT *context )
300 DWORD status = context->Fpscr;
302 if (status & 0x01) /* IE */
304 if (status & 0x40) /* SF */
305 return EXCEPTION_FLT_STACK_CHECK;
307 return EXCEPTION_FLT_INVALID_OPERATION;
309 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
310 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
311 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
312 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
313 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
314 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
317 /**********************************************************************
320 * Implementation of SIGSEGV handler.
322 static void do_segv( CONTEXT *context, int trap, int err, int code, void * addr )
324 EXCEPTION_RECORD rec;
325 DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
327 rec.ExceptionRecord = NULL;
328 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
329 rec.ExceptionAddress = addr;
330 rec.NumberParameters = 0;
334 switch ( code & 0xffff ) {
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;
344 default:FIXME("Unhandled SIGSEGV/%x\n",code);
349 switch ( code & 0xffff ) {
351 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
358 /* FIXME: correct for all cases ? */
359 rec.NumberParameters = 2;
360 rec.ExceptionInformation[0] = 0; /* FIXME ? */
361 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
362 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
364 rec.ExceptionCode = page_fault_code;
367 default:FIXME("Unhandled SIGBUS/%x\n",code);
372 switch ( code & 0xffff ) {
373 case ILL_ILLOPC: /* illegal opcode */
375 case ILL_ILLOPN: /* illegal operand */
378 case ILL_ILLADR: /* illegal addressing mode */
381 case ILL_ILLTRP: /* illegal trap */
384 case ILL_COPROC: /* coprocessor error */
386 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
388 case ILL_PRVOPC: /* privileged opcode */
390 case ILL_PRVREG: /* privileged register */
392 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
395 case ILL_BADSTK: /* internal stack error */
396 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
399 default:FIXME("Unhandled SIGILL/%x\n", code);
404 __regs_RtlRaiseException( &rec, context );
407 /**********************************************************************
410 * Implementation of SIGTRAP handler.
412 static void do_trap( CONTEXT *context, int code, void * addr )
414 EXCEPTION_RECORD rec;
416 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
417 rec.ExceptionRecord = NULL;
418 rec.ExceptionAddress = addr;
419 rec.NumberParameters = 0;
421 /* FIXME: check if we might need to modify PC */
422 switch (code & 0xffff) {
425 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
430 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
433 default:FIXME("Unhandled SIGTRAP/%x\n", code);
436 __regs_RtlRaiseException( &rec, context );
439 /**********************************************************************
442 * Implementation of SIGFPE handler.
444 static void do_fpe( CONTEXT *context, int code, void * addr )
446 EXCEPTION_RECORD rec;
448 switch ( code & 0xffff ) {
451 rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
456 rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
461 rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
466 rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
471 rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
476 rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
481 rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
488 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
491 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
492 rec.ExceptionRecord = NULL;
493 rec.ExceptionAddress = addr;
494 rec.NumberParameters = 0;
495 __regs_RtlRaiseException( &rec, context );
498 /**********************************************************************
501 * Handler for SIGSEGV and related errors.
503 static HANDLER_DEF(segv_handler)
506 save_context( &context, HANDLER_CONTEXT );
507 do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
508 restore_context( &context, HANDLER_CONTEXT );
511 /**********************************************************************
514 * Handler for SIGTRAP.
516 static HANDLER_DEF(trap_handler)
519 save_context( &context, HANDLER_CONTEXT );
520 do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
521 restore_context( &context, HANDLER_CONTEXT );
524 /**********************************************************************
527 * Handler for SIGFPE.
529 static HANDLER_DEF(fpe_handler)
532 save_fpu( &context, HANDLER_CONTEXT );
533 save_context( &context, HANDLER_CONTEXT );
534 do_fpe( &context, __siginfo->si_code, __siginfo->si_addr );
535 restore_context( &context, HANDLER_CONTEXT );
536 restore_fpu( &context, HANDLER_CONTEXT );
539 /**********************************************************************
542 * Handler for SIGINT.
544 static HANDLER_DEF(int_handler)
546 if (!dispatch_signal(SIGINT))
548 EXCEPTION_RECORD rec;
551 save_context( &context, HANDLER_CONTEXT );
552 rec.ExceptionCode = CONTROL_C_EXIT;
553 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
554 rec.ExceptionRecord = NULL;
555 rec.ExceptionAddress = (LPVOID)context.Iar;
556 rec.NumberParameters = 0;
557 __regs_RtlRaiseException( &rec, &context );
558 restore_context( &context, HANDLER_CONTEXT );
563 /**********************************************************************
566 * Handler for SIGABRT.
568 static HANDLER_DEF(abrt_handler)
570 EXCEPTION_RECORD rec;
573 save_context( &context, HANDLER_CONTEXT );
574 rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
575 rec.ExceptionFlags = EH_NONCONTINUABLE;
576 rec.ExceptionRecord = NULL;
577 rec.ExceptionAddress = (LPVOID)context.Iar;
578 rec.NumberParameters = 0;
579 __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
580 restore_context( &context, HANDLER_CONTEXT );
584 /**********************************************************************
587 * Handler for SIGTERM.
589 static HANDLER_DEF(term_handler)
591 server_abort_thread(0);
595 /**********************************************************************
598 * Handler for SIGUSR1, used to signal a thread that it got suspended.
600 static HANDLER_DEF(usr1_handler)
604 save_context( &context, HANDLER_CONTEXT );
605 wait_suspend( &context );
606 restore_context( &context, HANDLER_CONTEXT );
610 /**********************************************************************
611 * get_signal_stack_total_size
613 * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
614 * Must be a power of two.
616 size_t get_signal_stack_total_size(void)
618 assert( sizeof(TEB) <= getpagesize() );
619 return getpagesize(); /* this is just for the TEB, we don't need a signal stack */
623 /***********************************************************************
626 * Set a signal handler
628 static int set_handler( int sig, void (*func)() )
630 struct sigaction sig_act;
632 sig_act.sa_sigaction = func;
633 sig_act.sa_mask = server_block_set;
634 sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
635 return sigaction( sig, &sig_act, NULL );
639 /***********************************************************************
640 * __wine_set_signal_handler (NTDLL.@)
642 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
644 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
645 if (handlers[sig] != NULL) return -2;
651 /**********************************************************************
654 BOOL SIGNAL_Init(void)
656 if (set_handler( SIGINT, (void (*)())int_handler ) == -1) goto error;
657 if (set_handler( SIGFPE, (void (*)())fpe_handler ) == -1) goto error;
658 if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
659 if (set_handler( SIGILL, (void (*)())segv_handler ) == -1) goto error;
660 if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
661 if (set_handler( SIGTERM, (void (*)())term_handler ) == -1) goto error;
662 if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
664 if (set_handler( SIGBUS, (void (*)())segv_handler ) == -1) goto error;
667 if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
678 /**********************************************************************
679 * __wine_enter_vm86 (NTDLL.@)
681 void __wine_enter_vm86( CONTEXT *context )
683 MESSAGE("vm86 mode not supported on this platform\n");
686 /**********************************************************************
687 * DbgBreakPoint (NTDLL.@)
689 void WINAPI DbgBreakPoint(void)
691 kill(getpid(), SIGTRAP);
694 /**********************************************************************
695 * DbgUserBreakPoint (NTDLL.@)
697 void WINAPI DbgUserBreakPoint(void)
699 kill(getpid(), SIGTRAP);
702 #endif /* __powerpc__ */