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 * Handler for SIGSEGV.
179 static void segv_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
181 EXCEPTION_RECORD rec;
184 rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
186 /* we want the page-fault case to be fast */
187 if ( info->si_code == SEGV_ACCERR )
188 if (!(rec.ExceptionCode = virtual_handle_fault( info->si_addr, 0 ))) return;
190 save_context( &context, ucontext );
191 rec.ExceptionRecord = NULL;
192 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
193 rec.ExceptionAddress = (LPVOID)context.pc;
194 rec.NumberParameters = 2;
195 rec.ExceptionInformation[0] = 0; /* FIXME: read/write access ? */
196 rec.ExceptionInformation[1] = (ULONG_PTR)info->si_addr;
198 __regs_RtlRaiseException( &rec, &context );
199 restore_context( &context, ucontext );
202 /**********************************************************************
205 * Handler for SIGBUS.
207 static void bus_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
209 EXCEPTION_RECORD rec;
212 save_context( &context, ucontext );
213 rec.ExceptionRecord = NULL;
214 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
215 rec.ExceptionAddress = (LPVOID)context.pc;
216 rec.NumberParameters = 0;
218 if ( info->si_code == BUS_ADRALN )
219 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
221 rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
223 __regs_RtlRaiseException( &rec, &context );
224 restore_context( &context, ucontext );
227 /**********************************************************************
230 * Handler for SIGILL.
232 static void ill_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
234 EXCEPTION_RECORD rec;
237 switch ( info->si_code )
244 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
249 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
253 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
257 save_context( &context, ucontext );
258 rec.ExceptionRecord = NULL;
259 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
260 rec.ExceptionAddress = (LPVOID)context.pc;
261 rec.NumberParameters = 0;
262 __regs_RtlRaiseException( &rec, &context );
263 restore_context( &context, ucontext );
267 /**********************************************************************
270 * Handler for SIGTRAP.
272 static void trap_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
274 EXCEPTION_RECORD rec;
277 switch ( info->si_code )
280 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
284 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
288 save_context( &context, ucontext );
289 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
290 rec.ExceptionRecord = NULL;
291 rec.ExceptionAddress = (LPVOID)context.pc;
292 rec.NumberParameters = 0;
293 __regs_RtlRaiseException( &rec, &context );
294 restore_context( &context, ucontext );
298 /**********************************************************************
301 * Handler for SIGFPE.
303 static void fpe_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
305 EXCEPTION_RECORD rec;
308 switch ( info->si_code )
311 rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
314 rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
317 rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
320 rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
323 rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
326 rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
329 rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
333 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
337 save_context( &context, ucontext );
338 save_fpu( &context, ucontext );
339 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
340 rec.ExceptionRecord = NULL;
341 rec.ExceptionAddress = (LPVOID)context.pc;
342 rec.NumberParameters = 0;
343 __regs_RtlRaiseException( &rec, &context );
344 restore_context( &context, ucontext );
345 restore_fpu( &context, ucontext );
349 /**********************************************************************
352 * Handler for SIGINT.
354 static void int_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
356 if (!dispatch_signal(SIGINT))
358 EXCEPTION_RECORD rec;
361 save_context( &context, ucontext );
362 rec.ExceptionCode = CONTROL_C_EXIT;
363 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
364 rec.ExceptionRecord = NULL;
365 rec.ExceptionAddress = (LPVOID)context.pc;
366 rec.NumberParameters = 0;
367 __regs_RtlRaiseException( &rec, &context );
368 restore_context( &context, ucontext );
372 /**********************************************************************
375 * Handler for SIGABRT.
377 static HANDLER_DEF(abrt_handler)
379 EXCEPTION_RECORD rec;
382 save_context( &context, HANDLER_CONTEXT );
383 rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
384 rec.ExceptionFlags = EH_NONCONTINUABLE;
385 rec.ExceptionRecord = NULL;
386 rec.ExceptionAddress = (LPVOID)context.pc;
387 rec.NumberParameters = 0;
388 __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
389 restore_context( &context, HANDLER_CONTEXT );
393 /**********************************************************************
396 * Handler for SIGQUIT.
398 static HANDLER_DEF(quit_handler)
400 server_abort_thread(0);
404 /**********************************************************************
407 * Handler for SIGUSR1, used to signal a thread that it got suspended.
409 static HANDLER_DEF(usr1_handler)
413 save_context( &context, HANDLER_CONTEXT );
414 wait_suspend( &context );
415 restore_context( &context, HANDLER_CONTEXT );
419 /**********************************************************************
420 * get_signal_stack_total_size
422 * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
423 * Must be a power of two.
425 size_t get_signal_stack_total_size(void)
427 assert( sizeof(TEB) <= getpagesize() );
428 return getpagesize(); /* this is just for the TEB, we don't need a signal stack */
432 /***********************************************************************
435 * Set a signal handler
437 static int set_handler( int sig, void (*func)() )
439 struct sigaction sig_act;
441 sig_act.sa_sigaction = func;
442 sig_act.sa_mask = server_block_set;
443 sig_act.sa_flags = SA_SIGINFO;
445 return sigaction( sig, &sig_act, NULL );
449 /***********************************************************************
450 * __wine_set_signal_handler (NTDLL.@)
452 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
454 if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
455 if (handlers[sig] != NULL) return -2;
461 /**********************************************************************
464 void signal_init_thread( TEB *teb )
466 static int init_done;
470 pthread_key_create( &teb_key, NULL );
473 pthread_setspecific( teb_key, teb );
477 /**********************************************************************
478 * signal_init_process
480 void signal_init_process(void)
482 if (set_handler( SIGINT, (void (*)())int_handler ) == -1) goto error;
483 if (set_handler( SIGFPE, (void (*)())fpe_handler ) == -1) goto error;
484 if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
485 if (set_handler( SIGILL, (void (*)())ill_handler ) == -1) goto error;
486 if (set_handler( SIGBUS, (void (*)())bus_handler ) == -1) goto error;
487 if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
488 if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
489 if (set_handler( SIGQUIT, (void (*)())quit_handler ) == -1) goto error;
490 if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
491 /* 'ta 6' tells the kernel to synthesize any unaligned accesses this
492 process makes, instead of just signalling an error and terminating
493 the process. wine-devel did not reach a conclusion on whether
494 this is correct, because that is what x86 does, or it is harmful
495 because it could obscure problems in user code */
496 asm("ta 6"); /* 6 == ST_FIX_ALIGN defined in sys/trap.h */
497 signal_init_thread();
506 /**********************************************************************
509 void __wine_enter_vm86( CONTEXT *context )
511 MESSAGE("vm86 mode not supported on this platform\n");
514 /**********************************************************************
515 * DbgBreakPoint (NTDLL.@)
517 void WINAPI DbgBreakPoint(void)
519 kill(getpid(), SIGTRAP);
522 /**********************************************************************
523 * DbgUserBreakPoint (NTDLL.@)
525 void WINAPI DbgUserBreakPoint(void)
527 kill(getpid(), SIGTRAP);
530 /**********************************************************************
531 * NtCurrentTeb (NTDLL.@)
533 TEB * WINAPI NtCurrentTeb(void)
535 return pthread_getspecific( teb_key );
538 #endif /* __sparc__ */