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>
106 typedef siginfo_t siginfo;
108 typedef struct ucontext SIGCONTEXT;
111 # define HANDLER_DEF(name) void name( int __signal, siginfo *__siginfo, SIGCONTEXT *__context )
112 # define HANDLER_CONTEXT (__context)
114 /* All Registers access - only for local access */
115 # define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
116 # define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
117 # define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
118 # define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
120 /* Gpr Registers access */
121 # define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
123 # define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
124 # define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
125 # define CTR_sig(context) REG_sig(ctr, context)
127 # define XER_sig(context) REG_sig(xer, context) /* Link register */
128 # define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
129 # define CR_sig(context) REG_sig(cr, context) /* Condition register */
131 /* Float Registers access */
132 # define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
134 # define FPSCR_sig(context) FLOATREG_sig(fpscr, context)
136 /* Exception Registers access */
137 # define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
138 # define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
139 # define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
141 /* Signal defs : Those are undefined on darwin
158 #endif /* __APPLE__ */
162 typedef int (*wine_signal_handler)(unsigned int sig);
164 static wine_signal_handler handlers[256];
166 /***********************************************************************
169 static inline int dispatch_signal(unsigned int sig)
171 if (handlers[sig] == NULL) return 0;
172 return handlers[sig](sig);
175 /***********************************************************************
178 * Set the register values from a sigcontext.
180 static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
183 #define C(x) context->Gpr##x = GPR_sig(x,sigcontext)
184 /* Save Gpr registers */
185 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
186 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
187 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
191 context->Iar = IAR_sig(sigcontext); /* Program Counter */
192 context->Msr = MSR_sig(sigcontext); /* Machine State Register (Supervisor) */
193 context->Ctr = CTR_sig(sigcontext);
195 context->Xer = XER_sig(sigcontext);
196 context->Lr = LR_sig(sigcontext);
197 context->Cr = CR_sig(sigcontext);
199 /* Saving Exception regs */
200 context->Dar = DAR_sig(sigcontext);
201 context->Dsisr = DSISR_sig(sigcontext);
202 context->Trap = TRAP_sig(sigcontext);
206 /***********************************************************************
209 * Build a sigcontext from the register values.
211 static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
214 #define C(x) GPR_sig(x,sigcontext) = context->Gpr##x
215 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
216 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
217 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
221 IAR_sig(sigcontext) = context->Iar; /* Program Counter */
222 MSR_sig(sigcontext) = context->Msr; /* Machine State Register (Supervisor) */
223 CTR_sig(sigcontext) = context->Ctr;
225 XER_sig(sigcontext) = context->Xer;
226 LR_sig(sigcontext) = context->Lr;
227 CR_sig(sigcontext) = context->Cr;
229 /* Setting Exception regs */
230 DAR_sig(sigcontext) = context->Dar;
231 DSISR_sig(sigcontext) = context->Dsisr;
232 TRAP_sig(sigcontext) = context->Trap;
236 /***********************************************************************
239 * Set the FPU context from a sigcontext.
241 static inline void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
243 #define C(x) context->Fpr##x = FLOAT_sig(x,sigcontext)
244 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
245 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
246 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
249 context->Fpscr = FPSCR_sig(sigcontext);
253 /***********************************************************************
256 * Restore the FPU context to a sigcontext.
258 static inline void restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
260 #define C(x) FLOAT_sig(x,sigcontext) = context->Fpr##x
261 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
262 C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
263 C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
266 FPSCR_sig(sigcontext) = context->Fpscr;
270 /***********************************************************************
273 * Get the context of the current thread.
275 void get_cpu_context( CONTEXT *context )
277 FIXME("not implemented\n");
281 /***********************************************************************
284 * Set the new CPU context.
286 void set_cpu_context( const CONTEXT *context )
288 FIXME("not implemented\n");
292 /**********************************************************************
295 * Get the FPU exception code from the FPU status.
297 static inline DWORD get_fpu_code( const CONTEXT *context )
299 DWORD status = context->Fpscr;
301 if (status & 0x01) /* IE */
303 if (status & 0x40) /* SF */
304 return EXCEPTION_FLT_STACK_CHECK;
306 return EXCEPTION_FLT_INVALID_OPERATION;
308 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
309 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
310 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
311 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
312 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
313 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
316 /**********************************************************************
319 * Implementation of SIGSEGV handler.
321 static void do_segv( CONTEXT *context, int trap, int err, int code, void * addr )
323 EXCEPTION_RECORD rec;
325 rec.ExceptionRecord = NULL;
326 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
327 rec.ExceptionAddress = addr;
328 rec.NumberParameters = 0;
332 switch ( code & 0xffff ) {
335 rec.NumberParameters = 2;
336 rec.ExceptionInformation[0] = 0; /* FIXME ? */
337 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
338 if (!(rec.ExceptionCode = virtual_handle_fault(addr, rec.ExceptionInformation[0])))
341 default:FIXME("Unhandled SIGSEGV/%x\n",code);
346 switch ( code & 0xffff ) {
348 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
355 /* FIXME: correct for all cases ? */
356 rec.NumberParameters = 2;
357 rec.ExceptionInformation[0] = 0; /* FIXME ? */
358 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
359 if (!(rec.ExceptionCode = virtual_handle_fault(addr, rec.ExceptionInformation[0])))
363 default:FIXME("Unhandled SIGBUS/%x\n",code);
368 switch ( code & 0xffff ) {
369 case ILL_ILLOPC: /* illegal opcode */
371 case ILL_ILLOPN: /* illegal operand */
374 case ILL_ILLADR: /* illegal addressing mode */
377 case ILL_ILLTRP: /* illegal trap */
380 case ILL_COPROC: /* coprocessor error */
382 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
384 case ILL_PRVOPC: /* privileged opcode */
386 case ILL_PRVREG: /* privileged register */
388 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
391 case ILL_BADSTK: /* internal stack error */
392 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
395 default:FIXME("Unhandled SIGILL/%x\n", code);
400 __regs_RtlRaiseException( &rec, context );
403 /**********************************************************************
406 * Implementation of SIGTRAP handler.
408 static void do_trap( CONTEXT *context, int code, void * addr )
410 EXCEPTION_RECORD rec;
412 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
413 rec.ExceptionRecord = NULL;
414 rec.ExceptionAddress = addr;
415 rec.NumberParameters = 0;
417 /* FIXME: check if we might need to modify PC */
418 switch (code & 0xffff) {
421 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
426 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
429 default:FIXME("Unhandled SIGTRAP/%x\n", code);
432 __regs_RtlRaiseException( &rec, context );
435 /**********************************************************************
438 * Implementation of SIGFPE handler.
440 static void do_fpe( CONTEXT *context, int code, void * addr )
442 EXCEPTION_RECORD rec;
444 switch ( code & 0xffff ) {
447 rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
452 rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
457 rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
462 rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
467 rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
472 rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
477 rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
484 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
487 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
488 rec.ExceptionRecord = NULL;
489 rec.ExceptionAddress = addr;
490 rec.NumberParameters = 0;
491 __regs_RtlRaiseException( &rec, context );
494 /**********************************************************************
497 * Handler for SIGSEGV and related errors.
499 static HANDLER_DEF(segv_handler)
502 save_context( &context, HANDLER_CONTEXT );
503 do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
504 restore_context( &context, HANDLER_CONTEXT );
507 /**********************************************************************
510 * Handler for SIGTRAP.
512 static HANDLER_DEF(trap_handler)
515 save_context( &context, HANDLER_CONTEXT );
516 do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
517 restore_context( &context, HANDLER_CONTEXT );
520 /**********************************************************************
523 * Handler for SIGFPE.
525 static HANDLER_DEF(fpe_handler)
528 save_fpu( &context, HANDLER_CONTEXT );
529 save_context( &context, HANDLER_CONTEXT );
530 do_fpe( &context, __siginfo->si_code, __siginfo->si_addr );
531 restore_context( &context, HANDLER_CONTEXT );
532 restore_fpu( &context, HANDLER_CONTEXT );
535 /**********************************************************************
538 * Handler for SIGINT.
540 static HANDLER_DEF(int_handler)
542 if (!dispatch_signal(SIGINT))
544 EXCEPTION_RECORD rec;
547 save_context( &context, HANDLER_CONTEXT );
548 rec.ExceptionCode = CONTROL_C_EXIT;
549 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
550 rec.ExceptionRecord = NULL;
551 rec.ExceptionAddress = (LPVOID)context.Iar;
552 rec.NumberParameters = 0;
553 __regs_RtlRaiseException( &rec, &context );
554 restore_context( &context, HANDLER_CONTEXT );
559 /**********************************************************************
562 * Handler for SIGABRT.
564 static HANDLER_DEF(abrt_handler)
566 EXCEPTION_RECORD rec;
569 save_context( &context, HANDLER_CONTEXT );
570 rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
571 rec.ExceptionFlags = EH_NONCONTINUABLE;
572 rec.ExceptionRecord = NULL;
573 rec.ExceptionAddress = (LPVOID)context.Iar;
574 rec.NumberParameters = 0;
575 __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
576 restore_context( &context, HANDLER_CONTEXT );
580 /**********************************************************************
583 * Handler for SIGQUIT.
585 static HANDLER_DEF(quit_handler)
587 server_abort_thread(0);
591 /**********************************************************************
594 * Handler for SIGUSR1, used to signal a thread that it got suspended.
596 static HANDLER_DEF(usr1_handler)
600 save_context( &context, HANDLER_CONTEXT );
601 wait_suspend( &context );
602 restore_context( &context, HANDLER_CONTEXT );
606 /**********************************************************************
607 * get_signal_stack_total_size
609 * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
610 * Must be a power of two.
612 size_t get_signal_stack_total_size(void)
614 assert( sizeof(TEB) <= getpagesize() );
615 return getpagesize(); /* this is just for the TEB, we don't need a signal stack */
619 /***********************************************************************
622 * Set a signal handler
624 static int set_handler( int sig, void (*func)() )
626 struct sigaction sig_act;
628 sig_act.sa_sigaction = func;
629 sig_act.sa_mask = server_block_set;
630 sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
631 return sigaction( sig, &sig_act, NULL );
635 /***********************************************************************
636 * __wine_set_signal_handler (NTDLL.@)
638 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
640 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
641 if (handlers[sig] != NULL) return -2;
647 /**********************************************************************
650 void signal_init_thread(void)
654 /**********************************************************************
655 * signal_init_process
657 void signal_init_process(void)
659 if (set_handler( SIGINT, (void (*)())int_handler ) == -1) goto error;
660 if (set_handler( SIGFPE, (void (*)())fpe_handler ) == -1) goto error;
661 if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
662 if (set_handler( SIGILL, (void (*)())segv_handler ) == -1) goto error;
663 if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
664 if (set_handler( SIGQUIT, (void (*)())quit_handler ) == -1) goto error;
665 if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
667 if (set_handler( SIGBUS, (void (*)())segv_handler ) == -1) goto error;
670 if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
672 signal_init_thread();
681 /**********************************************************************
682 * __wine_enter_vm86 (NTDLL.@)
684 void __wine_enter_vm86( CONTEXT *context )
686 MESSAGE("vm86 mode not supported on this platform\n");
689 /**********************************************************************
690 * DbgBreakPoint (NTDLL.@)
692 void WINAPI DbgBreakPoint(void)
694 kill(getpid(), SIGTRAP);
697 /**********************************************************************
698 * DbgUserBreakPoint (NTDLL.@)
700 void WINAPI DbgUserBreakPoint(void)
702 kill(getpid(), SIGTRAP);
705 #endif /* __powerpc__ */