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;
324 DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
326 rec.ExceptionRecord = NULL;
327 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
328 rec.ExceptionAddress = addr;
329 rec.NumberParameters = 0;
333 switch ( code & 0xffff ) {
336 rec.NumberParameters = 2;
337 rec.ExceptionInformation[0] = 0; /* FIXME ? */
338 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
339 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
341 rec.ExceptionCode = page_fault_code;
343 default:FIXME("Unhandled SIGSEGV/%x\n",code);
348 switch ( code & 0xffff ) {
350 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
357 /* FIXME: correct for all cases ? */
358 rec.NumberParameters = 2;
359 rec.ExceptionInformation[0] = 0; /* FIXME ? */
360 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
361 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
363 rec.ExceptionCode = page_fault_code;
366 default:FIXME("Unhandled SIGBUS/%x\n",code);
371 switch ( code & 0xffff ) {
372 case ILL_ILLOPC: /* illegal opcode */
374 case ILL_ILLOPN: /* illegal operand */
377 case ILL_ILLADR: /* illegal addressing mode */
380 case ILL_ILLTRP: /* illegal trap */
383 case ILL_COPROC: /* coprocessor error */
385 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
387 case ILL_PRVOPC: /* privileged opcode */
389 case ILL_PRVREG: /* privileged register */
391 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
394 case ILL_BADSTK: /* internal stack error */
395 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
398 default:FIXME("Unhandled SIGILL/%x\n", code);
403 __regs_RtlRaiseException( &rec, context );
406 /**********************************************************************
409 * Implementation of SIGTRAP handler.
411 static void do_trap( CONTEXT *context, int code, void * addr )
413 EXCEPTION_RECORD rec;
415 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
416 rec.ExceptionRecord = NULL;
417 rec.ExceptionAddress = addr;
418 rec.NumberParameters = 0;
420 /* FIXME: check if we might need to modify PC */
421 switch (code & 0xffff) {
424 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
429 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
432 default:FIXME("Unhandled SIGTRAP/%x\n", code);
435 __regs_RtlRaiseException( &rec, context );
438 /**********************************************************************
441 * Implementation of SIGFPE handler.
443 static void do_fpe( CONTEXT *context, int code, void * addr )
445 EXCEPTION_RECORD rec;
447 switch ( code & 0xffff ) {
450 rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
455 rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
460 rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
465 rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
470 rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
475 rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
480 rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
487 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
490 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
491 rec.ExceptionRecord = NULL;
492 rec.ExceptionAddress = addr;
493 rec.NumberParameters = 0;
494 __regs_RtlRaiseException( &rec, context );
497 /**********************************************************************
500 * Handler for SIGSEGV and related errors.
502 static HANDLER_DEF(segv_handler)
505 save_context( &context, HANDLER_CONTEXT );
506 do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
507 restore_context( &context, HANDLER_CONTEXT );
510 /**********************************************************************
513 * Handler for SIGTRAP.
515 static HANDLER_DEF(trap_handler)
518 save_context( &context, HANDLER_CONTEXT );
519 do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
520 restore_context( &context, HANDLER_CONTEXT );
523 /**********************************************************************
526 * Handler for SIGFPE.
528 static HANDLER_DEF(fpe_handler)
531 save_fpu( &context, HANDLER_CONTEXT );
532 save_context( &context, HANDLER_CONTEXT );
533 do_fpe( &context, __siginfo->si_code, __siginfo->si_addr );
534 restore_context( &context, HANDLER_CONTEXT );
535 restore_fpu( &context, HANDLER_CONTEXT );
538 /**********************************************************************
541 * Handler for SIGINT.
543 static HANDLER_DEF(int_handler)
545 if (!dispatch_signal(SIGINT))
547 EXCEPTION_RECORD rec;
550 save_context( &context, HANDLER_CONTEXT );
551 rec.ExceptionCode = CONTROL_C_EXIT;
552 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
553 rec.ExceptionRecord = NULL;
554 rec.ExceptionAddress = (LPVOID)context.Iar;
555 rec.NumberParameters = 0;
556 __regs_RtlRaiseException( &rec, &context );
557 restore_context( &context, HANDLER_CONTEXT );
562 /**********************************************************************
565 * Handler for SIGABRT.
567 static HANDLER_DEF(abrt_handler)
569 EXCEPTION_RECORD rec;
572 save_context( &context, HANDLER_CONTEXT );
573 rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
574 rec.ExceptionFlags = EH_NONCONTINUABLE;
575 rec.ExceptionRecord = NULL;
576 rec.ExceptionAddress = (LPVOID)context.Iar;
577 rec.NumberParameters = 0;
578 __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
579 restore_context( &context, HANDLER_CONTEXT );
583 /**********************************************************************
586 * Handler for SIGQUIT.
588 static HANDLER_DEF(quit_handler)
590 server_abort_thread(0);
594 /**********************************************************************
597 * Handler for SIGUSR1, used to signal a thread that it got suspended.
599 static HANDLER_DEF(usr1_handler)
603 save_context( &context, HANDLER_CONTEXT );
604 wait_suspend( &context );
605 restore_context( &context, HANDLER_CONTEXT );
609 /**********************************************************************
610 * get_signal_stack_total_size
612 * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
613 * Must be a power of two.
615 size_t get_signal_stack_total_size(void)
617 assert( sizeof(TEB) <= getpagesize() );
618 return getpagesize(); /* this is just for the TEB, we don't need a signal stack */
622 /***********************************************************************
625 * Set a signal handler
627 static int set_handler( int sig, void (*func)() )
629 struct sigaction sig_act;
631 sig_act.sa_sigaction = func;
632 sig_act.sa_mask = server_block_set;
633 sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
634 return sigaction( sig, &sig_act, NULL );
638 /***********************************************************************
639 * __wine_set_signal_handler (NTDLL.@)
641 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
643 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
644 if (handlers[sig] != NULL) return -2;
650 /**********************************************************************
653 void signal_init_thread(void)
657 /**********************************************************************
658 * signal_init_process
660 void signal_init_process(void)
662 if (set_handler( SIGINT, (void (*)())int_handler ) == -1) goto error;
663 if (set_handler( SIGFPE, (void (*)())fpe_handler ) == -1) goto error;
664 if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
665 if (set_handler( SIGILL, (void (*)())segv_handler ) == -1) goto error;
666 if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
667 if (set_handler( SIGQUIT, (void (*)())quit_handler ) == -1) goto error;
668 if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
670 if (set_handler( SIGBUS, (void (*)())segv_handler ) == -1) goto error;
673 if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
675 signal_init_thread();
684 /**********************************************************************
685 * __wine_enter_vm86 (NTDLL.@)
687 void __wine_enter_vm86( CONTEXT *context )
689 MESSAGE("vm86 mode not supported on this platform\n");
692 /**********************************************************************
693 * DbgBreakPoint (NTDLL.@)
695 void WINAPI DbgBreakPoint(void)
697 kill(getpid(), SIGTRAP);
700 /**********************************************************************
701 * DbgUserBreakPoint (NTDLL.@)
703 void WINAPI DbgUserBreakPoint(void)
705 kill(getpid(), SIGTRAP);
708 #endif /* __powerpc__ */