dlls/ntdll/signal_sparc.c

   1 /*
   2  * Sparc signal handling routines
   3  *
   4  * Copyright 1999 Ulrich Weigand
   5  *
   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.
  10  *
  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.
  15  *
  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #ifdef __sparc__
  22
  23 #include "config.h"
  24
  25 #include <signal.h>
  26 #include <stdlib.h>
  27 #ifdef HAVE_UNISTD_H
  28 # include <unistd.h>
  29 #endif
  30 #include <stdio.h>
  31 #include <sys/ucontext.h>
  32
  33 #include "winternl.h"
  34 #include "winbase.h"
  35 #include "winnt.h"
  36
  37 #include "wine/exception.h"
  38 #include "global.h"
  39 #include "stackframe.h"
  40
  41 #include "wine/debug.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(seh);
  44
  45 typedef int (*wine_signal_handler)(unsigned int sig);
  46
  47 static wine_signal_handler handlers[256];
  48
  49 static sigset_t all_sigs;
  50
  51
  52 /***********************************************************************
  53  *           dispatch_signal
  54  */
  55 inline static int dispatch_signal(unsigned int sig)
  56 {
  57     if (handlers[sig] == NULL) return 0;
  58     return handlers[sig](sig);
  59 }
  60
  61
  62 /*
  63  * FIXME:  All this works only on Solaris for now
  64  */
  65
  66 /**********************************************************************
  67  *              save_context
  68  */
  69 static void save_context( CONTEXT *context, ucontext_t *ucontext )
  70 {
  71     /* Special registers */
  72     context->psr = ucontext->uc_mcontext.gregs[REG_PSR];
  73     context->pc  = ucontext->uc_mcontext.gregs[REG_PC];
  74     context->npc = ucontext->uc_mcontext.gregs[REG_nPC];
  75     context->y   = ucontext->uc_mcontext.gregs[REG_Y];
  76     context->wim = 0;  /* FIXME */
  77     context->tbr = 0;  /* FIXME */
  78
  79     /* Global registers */
  80     context->g0 = 0;  /* always */
  81     context->g1 = ucontext->uc_mcontext.gregs[REG_G1];
  82     context->g2 = ucontext->uc_mcontext.gregs[REG_G2];
  83     context->g3 = ucontext->uc_mcontext.gregs[REG_G3];
  84     context->g4 = ucontext->uc_mcontext.gregs[REG_G4];
  85     context->g5 = ucontext->uc_mcontext.gregs[REG_G5];
  86     context->g6 = ucontext->uc_mcontext.gregs[REG_G6];
  87     context->g7 = ucontext->uc_mcontext.gregs[REG_G7];
  88
  89     /* Current 'out' registers */
  90     context->o0 = ucontext->uc_mcontext.gregs[REG_O0];
  91     context->o1 = ucontext->uc_mcontext.gregs[REG_O1];
  92     context->o2 = ucontext->uc_mcontext.gregs[REG_O2];
  93     context->o3 = ucontext->uc_mcontext.gregs[REG_O3];
  94     context->o4 = ucontext->uc_mcontext.gregs[REG_O4];
  95     context->o5 = ucontext->uc_mcontext.gregs[REG_O5];
  96     context->o6 = ucontext->uc_mcontext.gregs[REG_O6];
  97     context->o7 = ucontext->uc_mcontext.gregs[REG_O7];
  98
  99     /* FIXME: what if the current register window isn't saved? */
 100     if ( ucontext->uc_mcontext.gwins && ucontext->uc_mcontext.gwins->wbcnt > 0 )
 101     {
 102         /* Current 'local' registers from first register window */
 103         context->l0 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[0];
 104         context->l1 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[1];
 105         context->l2 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[2];
 106         context->l3 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[3];
 107         context->l4 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[4];
 108         context->l5 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[5];
 109         context->l6 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[6];
 110         context->l7 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[7];
 111
 112         /* Current 'in' registers from first register window */
 113         context->i0 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[0];
 114         context->i1 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[1];
 115         context->i2 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[2];
 116         context->i3 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[3];
 117         context->i4 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[4];
 118         context->i5 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[5];
 119         context->i6 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[6];
 120         context->i7 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[7];
 121     }
 122 }
 123
 124 /**********************************************************************
 125  *              restore_context
 126  */
 127 static void restore_context( CONTEXT *context, ucontext_t *ucontext )
 128 {
 129    /* FIXME */
 130 }
 131
 132 /**********************************************************************
 133  *              save_fpu
 134  */
 135 static void save_fpu( CONTEXT *context, ucontext_t *ucontext )
 136 {
 137    /* FIXME */
 138 }
 139
 140 /**********************************************************************
 141  *              restore_fpu
 142  */
 143 static void restore_fpu( CONTEXT *context, ucontext_t *ucontext )
 144 {
 145    /* FIXME */
 146 }
 147
 148
 149 /**********************************************************************
 150  *              segv_handler
 151  *
 152  * Handler for SIGSEGV.
 153  */
 154 static void segv_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 155 {
 156     EXCEPTION_RECORD rec;
 157     CONTEXT context;
 158
 159     /* we want the page-fault case to be fast */
 160     if ( info->si_code == SEGV_ACCERR )
 161         if (VIRTUAL_HandleFault( (LPVOID)info->si_addr )) return;
 162
 163     save_context( &context, ucontext );
 164     rec.ExceptionCode    = EXCEPTION_ACCESS_VIOLATION;
 165     rec.ExceptionRecord  = NULL;
 166     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 167     rec.ExceptionAddress = (LPVOID)context.pc;
 168     rec.NumberParameters = 2;
 169     rec.ExceptionInformation[0] = 0;  /* FIXME: read/write access ? */
 170     rec.ExceptionInformation[1] = (DWORD)info->si_addr;
 171
 172     EXC_RtlRaiseException( &rec, &context );
 173     restore_context( &context, ucontext );
 174 }
 175
 176 /**********************************************************************
 177  *              bus_handler
 178  *
 179  * Handler for SIGBUS.
 180  */
 181 static void bus_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 182 {
 183     EXCEPTION_RECORD rec;
 184     CONTEXT context;
 185
 186     save_context( &context, ucontext );
 187     rec.ExceptionRecord  = NULL;
 188     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 189     rec.ExceptionAddress = (LPVOID)context.pc;
 190     rec.NumberParameters = 0;
 191
 192     if ( info->si_code == BUS_ADRALN )
 193         rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
 194     else
 195         rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
 196
 197     EXC_RtlRaiseException( &rec, &context );
 198     restore_context( &context, ucontext );
 199 }
 200
 201 /**********************************************************************
 202  *              ill_handler
 203  *
 204  * Handler for SIGILL.
 205  */
 206 static void ill_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 207 {
 208     EXCEPTION_RECORD rec;
 209     CONTEXT context;
 210
 211     switch ( info->si_code )
 212     {
 213     default:
 214     case ILL_ILLOPC:
 215     case ILL_ILLOPN:
 216     case ILL_ILLADR:
 217     case ILL_ILLTRP:
 218         rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
 219         break;
 220
 221     case ILL_PRVOPC:
 222     case ILL_PRVREG:
 223         rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
 224         break;
 225
 226     case ILL_BADSTK:
 227         rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
 228         break;
 229     }
 230
 231     save_context( &context, ucontext );
 232     rec.ExceptionRecord  = NULL;
 233     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 234     rec.ExceptionAddress = (LPVOID)context.pc;
 235     rec.NumberParameters = 0;
 236     EXC_RtlRaiseException( &rec, &context );
 237     restore_context( &context, ucontext );
 238 }
 239
 240
 241 /**********************************************************************
 242  *              trap_handler
 243  *
 244  * Handler for SIGTRAP.
 245  */
 246 static void trap_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 247 {
 248     EXCEPTION_RECORD rec;
 249     CONTEXT context;
 250
 251     switch ( info->si_code )
 252     {
 253     case TRAP_TRACE:
 254         rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
 255         break;
 256     case TRAP_BRKPT:
 257     default:
 258         rec.ExceptionCode = EXCEPTION_BREAKPOINT;
 259         break;
 260     }
 261
 262     save_context( &context, ucontext );
 263     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 264     rec.ExceptionRecord  = NULL;
 265     rec.ExceptionAddress = (LPVOID)context.pc;
 266     rec.NumberParameters = 0;
 267     EXC_RtlRaiseException( &rec, &context );
 268     restore_context( &context, ucontext );
 269 }
 270
 271
 272 /**********************************************************************
 273  *              fpe_handler
 274  *
 275  * Handler for SIGFPE.
 276  */
 277 static void fpe_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 278 {
 279     EXCEPTION_RECORD rec;
 280     CONTEXT context;
 281
 282     switch ( info->si_code )
 283     {
 284     case FPE_FLTSUB:
 285         rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
 286         break;
 287     case FPE_INTDIV:
 288         rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
 289         break;
 290     case FPE_INTOVF:
 291         rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
 292         break;
 293     case FPE_FLTDIV:
 294         rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
 295         break;
 296     case FPE_FLTOVF:
 297         rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
 298         break;
 299     case FPE_FLTUND:
 300         rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
 301         break;
 302     case FPE_FLTRES:
 303         rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
 304         break;
 305     case FPE_FLTINV:
 306     default:
 307         rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
 308         break;
 309     }
 310
 311     save_context( &context, ucontext );
 312     save_fpu( &context, ucontext );
 313     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 314     rec.ExceptionRecord  = NULL;
 315     rec.ExceptionAddress = (LPVOID)context.pc;
 316     rec.NumberParameters = 0;
 317     EXC_RtlRaiseException( &rec, &context );
 318     restore_context( &context, ucontext );
 319     restore_fpu( &context, ucontext );
 320 }
 321
 322
 323 /**********************************************************************
 324  *              int_handler
 325  *
 326  * Handler for SIGINT.
 327  */
 328 static void int_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 329 {
 330     if (!dispatch_signal(SIGINT))
 331     {
 332         EXCEPTION_RECORD rec;
 333         CONTEXT context;
 334
 335         save_context( &context, ucontext );
 336         rec.ExceptionCode    = CONTROL_C_EXIT;
 337         rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 338         rec.ExceptionRecord  = NULL;
 339         rec.ExceptionAddress = (LPVOID)context.pc;
 340         rec.NumberParameters = 0;
 341         EXC_RtlRaiseException( &rec, &context );
 342         restore_context( &context, ucontext );
 343     }
 344 }
 345
 346 /**********************************************************************
 347  *              abrt_handler
 348  *
 349  * Handler for SIGABRT.
 350  */
 351 static HANDLER_DEF(abrt_handler)
 352 {
 353     EXCEPTION_RECORD rec;
 354     CONTEXT context;
 355
 356     save_context( &context, HANDLER_CONTEXT );
 357     rec.ExceptionCode    = EXCEPTION_WINE_ASSERTION;
 358     rec.ExceptionFlags   = EH_NONCONTINUABLE;
 359     rec.ExceptionRecord  = NULL;
 360     rec.ExceptionAddress = (LPVOID)context.Eip;
 361     rec.NumberParameters = 0;
 362     EXC_RtlRaiseException( &rec, &context ); /* Should never return.. */
 363     restore_context( &context, HANDLER_CONTEXT );
 364 }
 365
 366 /***********************************************************************
 367  *           set_handler
 368  *
 369  * Set a signal handler
 370  */
 371 static int set_handler( int sig, void (*func)() )
 372 {
 373     struct sigaction sig_act;
 374
 375     sig_act.sa_handler = NULL;
 376     sig_act.sa_sigaction = func;
 377     sigemptyset( &sig_act.sa_mask );
 378     sig_act.sa_flags = SA_SIGINFO;
 379
 380     return sigaction( sig, &sig_act, NULL );
 381 }
 382
 383
 384 /***********************************************************************
 385  *           __wine_set_signal_handler   (NTDLL.@)
 386  */
 387 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
 388 {
 389     if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
 390     if (handlers[sig] != NULL) return -2;
 391     handlers[sig] = wsh;
 392     return 0;
 393 }
 394
 395
 396 /***********************************************************************
 397  *           SIGNAL_Unblock
 398  *
 399  * Unblock signals. Called from EXC_RtlRaiseException.
 400  */
 401 void SIGNAL_Unblock( void )
 402 {
 403     sigprocmask( SIG_UNBLOCK, &all_sigs, NULL );
 404 }
 405
 406
 407 /**********************************************************************
 408  *              SIGNAL_Init
 409  */
 410 BOOL SIGNAL_Init(void)
 411 {
 412     sigfillset( &all_sigs );
 413
 414     if (set_handler( SIGINT,  (void (*)())int_handler  ) == -1) goto error;
 415     if (set_handler( SIGFPE,  (void (*)())fpe_handler  ) == -1) goto error;
 416     if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
 417     if (set_handler( SIGILL,  (void (*)())ill_handler  ) == -1) goto error;
 418     if (set_handler( SIGBUS,  (void (*)())bus_handler  ) == -1) goto error;
 419     if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
 420     if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
 421    return TRUE;
 422
 423  error:
 424     perror("sigaction");
 425     return FALSE;
 426 }
 427
 428
 429 /**********************************************************************
 430  *              SIGNAL_Reset
 431  */
 432 void SIGNAL_Reset(void)
 433 {
 434     sigset_t block_set;
 435
 436     /* block the async signals */
 437     sigemptyset( &block_set );
 438     sigaddset( &block_set, SIGALRM );
 439     sigaddset( &block_set, SIGIO );
 440     sigaddset( &block_set, SIGHUP );
 441     sigaddset( &block_set, SIGUSR2 );
 442     sigprocmask( SIG_BLOCK, &block_set, NULL );
 443
 444     /* restore default handlers */
 445     signal( SIGINT, SIG_DFL );
 446     signal( SIGFPE, SIG_DFL );
 447     signal( SIGSEGV, SIG_DFL );
 448     signal( SIGILL, SIG_DFL );
 449     signal( SIGBUS, SIG_DFL );
 450     signal( SIGTRAP, SIG_DFL );
 451 }
 452
 453
 454 /**********************************************************************
 455  *              __wine_enter_vm86
 456  */
 457 void __wine_enter_vm86( CONTEXT *context )
 458 {
 459     MESSAGE("vm86 mode not supported on this platform\n");
 460 }
 461
 462 /**********************************************************************
 463  *              DbgBreakPoint   (NTDLL.@)
 464  */
 465 void WINAPI DbgBreakPoint(void)
 466 {
 467      kill(getpid(), SIGTRAP);
 468 }
 469
 470 /**********************************************************************
 471  *              DbgUserBreakPoint   (NTDLL.@)
 472  */
 473 void WINAPI DbgUserBreakPoint(void)
 474 {
 475      kill(getpid(), SIGTRAP);
 476 }
 477
 478 #endif  /* __sparc__ */