2 * Sparc signal handling routines
4 * Copyright 1999 Ulrich Weigand
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"
34 #include <sys/ucontext.h>
40 #include "wine/exception.h"
41 #include "ntdll_misc.h"
43 #include "wine/debug.h"
45 WINE_DEFAULT_DEBUG_CHANNEL(seh);
47 static pthread_key_t teb_key;
49 #define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, ucontext_t *__context )
50 #define HANDLER_CONTEXT (__context)
52 typedef int (*wine_signal_handler)(unsigned int sig);
54 static wine_signal_handler handlers[256];
56 /***********************************************************************
59 static inline int dispatch_signal(unsigned int sig)
61 if (handlers[sig] == NULL) return 0;
62 return handlers[sig](sig);
67 * FIXME: All this works only on Solaris for now
70 /**********************************************************************
73 static void save_context( CONTEXT *context, ucontext_t *ucontext )
75 /* Special registers */
76 context->psr = ucontext->uc_mcontext.gregs[REG_PSR];
77 context->pc = ucontext->uc_mcontext.gregs[REG_PC];
78 context->npc = ucontext->uc_mcontext.gregs[REG_nPC];
79 context->y = ucontext->uc_mcontext.gregs[REG_Y];
80 context->wim = 0; /* FIXME */
81 context->tbr = 0; /* FIXME */
83 /* Global registers */
84 context->g0 = 0; /* always */
85 context->g1 = ucontext->uc_mcontext.gregs[REG_G1];
86 context->g2 = ucontext->uc_mcontext.gregs[REG_G2];
87 context->g3 = ucontext->uc_mcontext.gregs[REG_G3];
88 context->g4 = ucontext->uc_mcontext.gregs[REG_G4];
89 context->g5 = ucontext->uc_mcontext.gregs[REG_G5];
90 context->g6 = ucontext->uc_mcontext.gregs[REG_G6];
91 context->g7 = ucontext->uc_mcontext.gregs[REG_G7];
93 /* Current 'out' registers */
94 context->o0 = ucontext->uc_mcontext.gregs[REG_O0];
95 context->o1 = ucontext->uc_mcontext.gregs[REG_O1];
96 context->o2 = ucontext->uc_mcontext.gregs[REG_O2];
97 context->o3 = ucontext->uc_mcontext.gregs[REG_O3];
98 context->o4 = ucontext->uc_mcontext.gregs[REG_O4];
99 context->o5 = ucontext->uc_mcontext.gregs[REG_O5];
100 context->o6 = ucontext->uc_mcontext.gregs[REG_O6];
101 context->o7 = ucontext->uc_mcontext.gregs[REG_O7];
103 /* FIXME: what if the current register window isn't saved? */
104 if ( ucontext->uc_mcontext.gwins && ucontext->uc_mcontext.gwins->wbcnt > 0 )
106 /* Current 'local' registers from first register window */
107 context->l0 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[0];
108 context->l1 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[1];
109 context->l2 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[2];
110 context->l3 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[3];
111 context->l4 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[4];
112 context->l5 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[5];
113 context->l6 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[6];
114 context->l7 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[7];
116 /* Current 'in' registers from first register window */
117 context->i0 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[0];
118 context->i1 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[1];
119 context->i2 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[2];
120 context->i3 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[3];
121 context->i4 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[4];
122 context->i5 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[5];
123 context->i6 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[6];
124 context->i7 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[7];
128 /**********************************************************************
131 static void restore_context( CONTEXT *context, ucontext_t *ucontext )
136 /**********************************************************************
139 static void save_fpu( CONTEXT *context, ucontext_t *ucontext )
144 /**********************************************************************
147 static void restore_fpu( CONTEXT *context, ucontext_t *ucontext )
153 /***********************************************************************
154 * RtlCaptureContext (NTDLL.@)
156 void WINAPI RtlCaptureContext( CONTEXT *context )
158 FIXME("not implemented\n");
159 memset( context, 0, sizeof(*context) );
163 /***********************************************************************
166 * Set the new CPU context.
168 void set_cpu_context( const CONTEXT *context )
170 FIXME("not implemented\n");
174 /***********************************************************************
177 * Copy a register context according to the flags.
179 void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
181 flags &= ~CONTEXT_SPARC; /* get rid of CPU id */
182 if (flags & CONTEXT_CONTROL)
191 if (flags & CONTEXT_INTEGER)
226 if (flags & CONTEXT_FLOATING_POINT)
233 /**********************************************************************
236 * Handler for SIGSEGV.
238 static void segv_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
240 EXCEPTION_RECORD rec;
243 rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
245 /* we want the page-fault case to be fast */
246 if ( info->si_code == SEGV_ACCERR )
247 if (!(rec.ExceptionCode = virtual_handle_fault( info->si_addr, 0 ))) return;
249 save_context( &context, ucontext );
250 rec.ExceptionRecord = NULL;
251 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
252 rec.ExceptionAddress = (LPVOID)context.pc;
253 rec.NumberParameters = 2;
254 rec.ExceptionInformation[0] = 0; /* FIXME: read/write access ? */
255 rec.ExceptionInformation[1] = (ULONG_PTR)info->si_addr;
257 __regs_RtlRaiseException( &rec, &context );
258 restore_context( &context, ucontext );
261 /**********************************************************************
264 * Handler for SIGBUS.
266 static void bus_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
268 EXCEPTION_RECORD rec;
271 save_context( &context, ucontext );
272 rec.ExceptionRecord = NULL;
273 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
274 rec.ExceptionAddress = (LPVOID)context.pc;
275 rec.NumberParameters = 0;
277 if ( info->si_code == BUS_ADRALN )
278 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
280 rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
282 __regs_RtlRaiseException( &rec, &context );
283 restore_context( &context, ucontext );
286 /**********************************************************************
289 * Handler for SIGILL.
291 static void ill_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
293 EXCEPTION_RECORD rec;
296 switch ( info->si_code )
303 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
308 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
312 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
316 save_context( &context, ucontext );
317 rec.ExceptionRecord = NULL;
318 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
319 rec.ExceptionAddress = (LPVOID)context.pc;
320 rec.NumberParameters = 0;
321 __regs_RtlRaiseException( &rec, &context );
322 restore_context( &context, ucontext );
326 /**********************************************************************
329 * Handler for SIGTRAP.
331 static void trap_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
333 EXCEPTION_RECORD rec;
336 switch ( info->si_code )
339 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
343 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
347 save_context( &context, ucontext );
348 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
349 rec.ExceptionRecord = NULL;
350 rec.ExceptionAddress = (LPVOID)context.pc;
351 rec.NumberParameters = 0;
352 __regs_RtlRaiseException( &rec, &context );
353 restore_context( &context, ucontext );
357 /**********************************************************************
360 * Handler for SIGFPE.
362 static void fpe_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
364 EXCEPTION_RECORD rec;
367 switch ( info->si_code )
370 rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
373 rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
376 rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
379 rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
382 rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
385 rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
388 rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
392 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
396 save_context( &context, ucontext );
397 save_fpu( &context, ucontext );
398 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
399 rec.ExceptionRecord = NULL;
400 rec.ExceptionAddress = (LPVOID)context.pc;
401 rec.NumberParameters = 0;
402 __regs_RtlRaiseException( &rec, &context );
403 restore_context( &context, ucontext );
404 restore_fpu( &context, ucontext );
408 /**********************************************************************
411 * Handler for SIGINT.
413 static void int_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
415 if (!dispatch_signal(SIGINT))
417 EXCEPTION_RECORD rec;
420 save_context( &context, ucontext );
421 rec.ExceptionCode = CONTROL_C_EXIT;
422 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
423 rec.ExceptionRecord = NULL;
424 rec.ExceptionAddress = (LPVOID)context.pc;
425 rec.NumberParameters = 0;
426 __regs_RtlRaiseException( &rec, &context );
427 restore_context( &context, ucontext );
431 /**********************************************************************
434 * Handler for SIGABRT.
436 static HANDLER_DEF(abrt_handler)
438 EXCEPTION_RECORD rec;
441 save_context( &context, HANDLER_CONTEXT );
442 rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
443 rec.ExceptionFlags = EH_NONCONTINUABLE;
444 rec.ExceptionRecord = NULL;
445 rec.ExceptionAddress = (LPVOID)context.pc;
446 rec.NumberParameters = 0;
447 __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
448 restore_context( &context, HANDLER_CONTEXT );
452 /**********************************************************************
455 * Handler for SIGQUIT.
457 static HANDLER_DEF(quit_handler)
463 /**********************************************************************
466 * Handler for SIGUSR1, used to signal a thread that it got suspended.
468 static HANDLER_DEF(usr1_handler)
472 save_context( &context, HANDLER_CONTEXT );
473 wait_suspend( &context );
474 restore_context( &context, HANDLER_CONTEXT );
478 /**********************************************************************
479 * get_signal_stack_total_size
481 * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
482 * Must be a power of two.
484 size_t get_signal_stack_total_size(void)
486 assert( sizeof(TEB) <= getpagesize() );
487 return getpagesize(); /* this is just for the TEB, we don't need a signal stack */
491 /***********************************************************************
494 * Set a signal handler
496 static int set_handler( int sig, void (*func)() )
498 struct sigaction sig_act;
500 sig_act.sa_sigaction = func;
501 sig_act.sa_mask = server_block_set;
502 sig_act.sa_flags = SA_SIGINFO;
504 return sigaction( sig, &sig_act, NULL );
508 /***********************************************************************
509 * __wine_set_signal_handler (NTDLL.@)
511 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
513 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
514 if (handlers[sig] != NULL) return -2;
520 /**********************************************************************
523 void signal_init_thread( TEB *teb )
525 static int init_done;
529 pthread_key_create( &teb_key, NULL );
532 pthread_setspecific( teb_key, teb );
536 /**********************************************************************
537 * signal_init_process
539 void signal_init_process(void)
541 if (set_handler( SIGINT, (void (*)())int_handler ) == -1) goto error;
542 if (set_handler( SIGFPE, (void (*)())fpe_handler ) == -1) goto error;
543 if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
544 if (set_handler( SIGILL, (void (*)())ill_handler ) == -1) goto error;
545 if (set_handler( SIGBUS, (void (*)())bus_handler ) == -1) goto error;
546 if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
547 if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
548 if (set_handler( SIGQUIT, (void (*)())quit_handler ) == -1) goto error;
549 if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
550 /* 'ta 6' tells the kernel to synthesize any unaligned accesses this
551 process makes, instead of just signalling an error and terminating
552 the process. wine-devel did not reach a conclusion on whether
553 this is correct, because that is what x86 does, or it is harmful
554 because it could obscure problems in user code */
555 asm("ta 6"); /* 6 == ST_FIX_ALIGN defined in sys/trap.h */
556 signal_init_thread();
565 /**********************************************************************
568 void __wine_enter_vm86( CONTEXT *context )
570 MESSAGE("vm86 mode not supported on this platform\n");
573 /**********************************************************************
574 * DbgBreakPoint (NTDLL.@)
576 void WINAPI DbgBreakPoint(void)
578 kill(getpid(), SIGTRAP);
581 /**********************************************************************
582 * DbgUserBreakPoint (NTDLL.@)
584 void WINAPI DbgUserBreakPoint(void)
586 kill(getpid(), SIGTRAP);
589 /**********************************************************************
590 * NtCurrentTeb (NTDLL.@)
592 TEB * WINAPI NtCurrentTeb(void)
594 return pthread_getspecific( teb_key );
597 #endif /* __sparc__ */