dlls/ntdll/signal_powerpc.c

   1 /*
   2  * PowerPC signal handling routines
   3  *
   4  * Copyright 2002 Marcus Meissner, SuSE Linux AG
   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 __powerpc__
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <signal.h>
  27 #include <stdlib.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30 #ifdef HAVE_UNISTD_H
  31 # include <unistd.h>
  32 #endif
  33
  34 #ifdef HAVE_SYS_PARAM_H
  35 # include <sys/param.h>
  36 #endif
  37 #ifdef HAVE_SYSCALL_H
  38 # include <syscall.h>
  39 #else
  40 # ifdef HAVE_SYS_SYSCALL_H
  41 #  include <sys/syscall.h>
  42 # endif
  43 #endif
  44
  45 #ifdef HAVE_SYS_VM86_H
  46 # include <sys/vm86.h>
  47 #endif
  48
  49 #ifdef HAVE_SYS_SIGNAL_H
  50 # include <sys/signal.h>
  51 #endif
  52
  53 #include "windef.h"
  54 #include "winternl.h"
  55 #include "wine/library.h"
  56 #include "wine/exception.h"
  57 #include "ntdll_misc.h"
  58 #include "wine/debug.h"
  59
  60 WINE_DEFAULT_DEBUG_CHANNEL(seh);
  61
  62
  63 /***********************************************************************
  64  * signal context platform-specific definitions
  65  */
  66 #ifdef linux
  67
  68 typedef struct ucontext SIGCONTEXT;
  69
  70 # define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, SIGCONTEXT *__context )
  71 # define HANDLER_CONTEXT (__context)
  72
  73 /* All Registers access - only for local access */
  74 # define REG_sig(reg_name, context)             ((context)->uc_mcontext.regs->reg_name)
  75
  76
  77 /* Gpr Registers access  */
  78 # define GPR_sig(reg_num, context)              REG_sig(gpr[reg_num], context)
  79
  80 # define IAR_sig(context)                       REG_sig(nip, context)   /* Program counter */
  81 # define MSR_sig(context)                       REG_sig(msr, context)   /* Machine State Register (Supervisor) */
  82 # define CTR_sig(context)                       REG_sig(ctr, context)   /* Count register */
  83
  84 # define XER_sig(context)                       REG_sig(xer, context) /* User's integer exception register */
  85 # define LR_sig(context)                        REG_sig(link, context) /* Link register */
  86 # define CR_sig(context)                        REG_sig(ccr, context) /* Condition register */
  87
  88 /* Float Registers access  */
  89 # define FLOAT_sig(reg_num, context)            (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
  90
  91 # define FPSCR_sig(context)                     (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
  92
  93 /* Exception Registers access */
  94 # define DAR_sig(context)                       REG_sig(dar, context)
  95 # define DSISR_sig(context)                     REG_sig(dsisr, context)
  96 # define TRAP_sig(context)                      REG_sig(trap, context)
  97
  98 #endif /* linux */
  99
 100 #ifdef __APPLE__
 101
 102 # include <sys/ucontext.h>
 103
 104 # include <sys/types.h>
 105 # include <signal.h>
 106 typedef siginfo_t siginfo;
 107
 108 typedef struct ucontext SIGCONTEXT;
 109
 110
 111 # define HANDLER_DEF(name) void name( int __signal, siginfo *__siginfo, SIGCONTEXT *__context )
 112 # define HANDLER_CONTEXT (__context)
 113
 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)
 119
 120 /* Gpr Registers access */
 121 # define GPR_sig(reg_num, context)              REG_sig(r##reg_num, context)
 122
 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)
 126
 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 */
 130
 131 /* Float Registers access */
 132 # define FLOAT_sig(reg_num, context)            FLOATREG_sig(fpregs[reg_num], context)
 133
 134 # define FPSCR_sig(context)                     FLOATREG_sig(fpscr, context)
 135
 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 */
 140
 141 /* Signal defs : Those are undefined on darwin
 142 SIGBUS
 143 #undef BUS_ADRERR
 144 #undef BUS_OBJERR
 145 SIGILL
 146 #undef ILL_ILLOPN
 147 #undef ILL_ILLTRP
 148 #undef ILL_ILLADR
 149 #undef ILL_COPROC
 150 #undef ILL_PRVREG
 151 #undef ILL_BADSTK
 152 SIGTRAP
 153 #undef TRAP_BRKPT
 154 #undef TRAP_TRACE
 155 SIGFPE
 156 */
 157
 158 #endif /* __APPLE__ */
 159
 160
 161
 162 typedef int (*wine_signal_handler)(unsigned int sig);
 163
 164 static wine_signal_handler handlers[256];
 165
 166 /***********************************************************************
 167  *           dispatch_signal
 168  */
 169 inline static int dispatch_signal(unsigned int sig)
 170 {
 171     if (handlers[sig] == NULL) return 0;
 172     return handlers[sig](sig);
 173 }
 174
 175 /***********************************************************************
 176  *           save_context
 177  *
 178  * Set the register values from a sigcontext.
 179  */
 180 static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
 181 {
 182
 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);
 188         C(31);
 189 #undef C
 190
 191         context->Iar = IAR_sig(sigcontext);  /* Program Counter */
 192         context->Msr = MSR_sig(sigcontext);  /* Machine State Register (Supervisor) */
 193         context->Ctr = CTR_sig(sigcontext);
 194
 195         context->Xer = XER_sig(sigcontext);
 196         context->Lr  = LR_sig(sigcontext);
 197         context->Cr  = CR_sig(sigcontext);
 198
 199         /* Saving Exception regs */
 200         context->Dar   = DAR_sig(sigcontext);
 201         context->Dsisr = DSISR_sig(sigcontext);
 202         context->Trap  = TRAP_sig(sigcontext);
 203 }
 204
 205
 206 /***********************************************************************
 207  *           restore_context
 208  *
 209  * Build a sigcontext from the register values.
 210  */
 211 static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
 212 {
 213
 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);
 218         C(31);
 219 #undef C
 220
 221         IAR_sig(sigcontext) = context->Iar;  /* Program Counter */
 222         MSR_sig(sigcontext) = context->Msr;  /* Machine State Register (Supervisor) */
 223         CTR_sig(sigcontext) = context->Ctr;
 224
 225         XER_sig(sigcontext) = context->Xer;
 226         LR_sig(sigcontext) = context->Lr;
 227         CR_sig(sigcontext) = context->Cr;
 228
 229         /* Setting Exception regs */
 230         DAR_sig(sigcontext) = context->Dar;
 231         DSISR_sig(sigcontext) = context->Dsisr;
 232         TRAP_sig(sigcontext) = context->Trap;
 233 }
 234
 235
 236 /***********************************************************************
 237  *           save_fpu
 238  *
 239  * Set the FPU context from a sigcontext.
 240  */
 241 inline static void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
 242 {
 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);
 247         C(31);
 248 #undef C
 249         context->Fpscr = FPSCR_sig(sigcontext);
 250 }
 251
 252
 253 /***********************************************************************
 254  *           restore_fpu
 255  *
 256  * Restore the FPU context to a sigcontext.
 257  */
 258 inline static void restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
 259 {
 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);
 264         C(31);
 265 #undef C
 266         FPSCR_sig(sigcontext) = context->Fpscr;
 267 }
 268
 269
 270 /**********************************************************************
 271  *              get_fpu_code
 272  *
 273  * Get the FPU exception code from the FPU status.
 274  */
 275 static inline DWORD get_fpu_code( const CONTEXT *context )
 276 {
 277     DWORD status  = context->Fpscr;
 278
 279     if (status & 0x01)  /* IE */
 280     {
 281         if (status & 0x40)  /* SF */
 282             return EXCEPTION_FLT_STACK_CHECK;
 283         else
 284             return EXCEPTION_FLT_INVALID_OPERATION;
 285     }
 286     if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND;  /* DE flag */
 287     if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO;    /* ZE flag */
 288     if (status & 0x08) return EXCEPTION_FLT_OVERFLOW;          /* OE flag */
 289     if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW;         /* UE flag */
 290     if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT;    /* PE flag */
 291     return EXCEPTION_FLT_INVALID_OPERATION;  /* generic error */
 292 }
 293
 294 /**********************************************************************
 295  *              do_segv
 296  *
 297  * Implementation of SIGSEGV handler.
 298  */
 299 static void do_segv( CONTEXT *context, int trap, int err, int code, void * addr )
 300 {
 301     EXCEPTION_RECORD rec;
 302     DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
 303
 304     rec.ExceptionRecord  = NULL;
 305     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 306     rec.ExceptionAddress = addr;
 307     rec.NumberParameters = 0;
 308
 309     switch (trap) {
 310     case SIGSEGV:
 311         switch ( code & 0xffff ) {
 312         case SEGV_MAPERR:
 313         case SEGV_ACCERR:
 314                 rec.NumberParameters = 2;
 315                 rec.ExceptionInformation[0] = 0; /* FIXME ? */
 316                 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
 317                 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
 318                         return;
 319                 rec.ExceptionCode = page_fault_code;
 320                 break;
 321         default:FIXME("Unhandled SIGSEGV/%x\n",code);
 322                 break;
 323         }
 324         break;
 325     case SIGBUS:
 326         switch ( code & 0xffff ) {
 327         case BUS_ADRALN:
 328                 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
 329                 break;
 330 #ifdef BUS_ADRERR
 331         case BUS_ADRERR:
 332 #endif
 333 #ifdef BUS_OBJERR
 334         case BUS_OBJERR:
 335                 /* FIXME: correct for all cases ? */
 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)))
 340                         return;
 341                 rec.ExceptionCode = page_fault_code;
 342                 break;
 343 #endif
 344         default:FIXME("Unhandled SIGBUS/%x\n",code);
 345                 break;
 346         }
 347         break;
 348     case SIGILL:
 349         switch ( code & 0xffff ) {
 350         case ILL_ILLOPC: /* illegal opcode */
 351 #ifdef ILL_ILLOPN
 352         case ILL_ILLOPN: /* illegal operand */
 353 #endif
 354 #ifdef ILL_ILLADR
 355         case ILL_ILLADR: /* illegal addressing mode */
 356 #endif
 357 #ifdef ILL_ILLTRP
 358         case ILL_ILLTRP: /* illegal trap */
 359 #endif
 360 #ifdef ILL_COPROC
 361         case ILL_COPROC: /* coprocessor error */
 362 #endif
 363                 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
 364                 break;
 365         case ILL_PRVOPC: /* privileged opcode */
 366 #ifdef ILL_PRVREG
 367         case ILL_PRVREG: /* privileged register */
 368 #endif
 369                 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
 370                 break;
 371 #ifdef ILL_BADSTK
 372         case ILL_BADSTK: /* internal stack error */
 373                 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
 374                 break;
 375 #endif
 376         default:FIXME("Unhandled SIGILL/%x\n", code);
 377                 break;
 378         }
 379         break;
 380     }
 381     __regs_RtlRaiseException( &rec, context );
 382 }
 383
 384 /**********************************************************************
 385  *              do_trap
 386  *
 387  * Implementation of SIGTRAP handler.
 388  */
 389 static void do_trap( CONTEXT *context, int code, void * addr )
 390 {
 391     EXCEPTION_RECORD rec;
 392
 393     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 394     rec.ExceptionRecord  = NULL;
 395     rec.ExceptionAddress = addr;
 396     rec.NumberParameters = 0;
 397
 398     /* FIXME: check if we might need to modify PC */
 399     switch (code & 0xffff) {
 400 #ifdef TRAP_BRKPT
 401     case TRAP_BRKPT:
 402         rec.ExceptionCode = EXCEPTION_BREAKPOINT;
 403         break;
 404 #endif
 405 #ifdef TRAP_TRACE
 406     case TRAP_TRACE:
 407         rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
 408         break;
 409 #endif
 410     default:FIXME("Unhandled SIGTRAP/%x\n", code);
 411                 break;
 412     }
 413     __regs_RtlRaiseException( &rec, context );
 414 }
 415
 416 /**********************************************************************
 417  *              do_trap
 418  *
 419  * Implementation of SIGFPE handler.
 420  */
 421 static void do_fpe( CONTEXT *context, int code, void * addr )
 422 {
 423     EXCEPTION_RECORD rec;
 424
 425     switch ( code  & 0xffff ) {
 426 #ifdef FPE_FLTSUB
 427     case FPE_FLTSUB:
 428         rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
 429         break;
 430 #endif
 431 #ifdef FPE_INTDIV
 432     case FPE_INTDIV:
 433         rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
 434         break;
 435 #endif
 436 #ifdef FPE_INTOVF
 437     case FPE_INTOVF:
 438         rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
 439         break;
 440 #endif
 441 #ifdef FPE_FLTDIV
 442     case FPE_FLTDIV:
 443         rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
 444         break;
 445 #endif
 446 #ifdef FPE_FLTOVF
 447     case FPE_FLTOVF:
 448         rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
 449         break;
 450 #endif
 451 #ifdef FPE_FLTUND
 452     case FPE_FLTUND:
 453         rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
 454         break;
 455 #endif
 456 #ifdef FPE_FLTRES
 457     case FPE_FLTRES:
 458         rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
 459         break;
 460 #endif
 461 #ifdef FPE_FLTINV
 462     case FPE_FLTINV:
 463 #endif
 464     default:
 465         rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
 466         break;
 467     }
 468     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 469     rec.ExceptionRecord  = NULL;
 470     rec.ExceptionAddress = addr;
 471     rec.NumberParameters = 0;
 472     __regs_RtlRaiseException( &rec, context );
 473 }
 474
 475 /**********************************************************************
 476  *              segv_handler
 477  *
 478  * Handler for SIGSEGV and related errors.
 479  */
 480 static HANDLER_DEF(segv_handler)
 481 {
 482     CONTEXT context;
 483     save_context( &context, HANDLER_CONTEXT );
 484     do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
 485     restore_context( &context, HANDLER_CONTEXT );
 486 }
 487
 488 /**********************************************************************
 489  *              trap_handler
 490  *
 491  * Handler for SIGTRAP.
 492  */
 493 static HANDLER_DEF(trap_handler)
 494 {
 495     CONTEXT context;
 496     save_context( &context, HANDLER_CONTEXT );
 497     do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
 498     restore_context( &context, HANDLER_CONTEXT );
 499 }
 500
 501 /**********************************************************************
 502  *              fpe_handler
 503  *
 504  * Handler for SIGFPE.
 505  */
 506 static HANDLER_DEF(fpe_handler)
 507 {
 508     CONTEXT context;
 509     save_fpu( &context, HANDLER_CONTEXT );
 510     save_context( &context, HANDLER_CONTEXT );
 511     do_fpe( &context,  __siginfo->si_code, __siginfo->si_addr );
 512     restore_context( &context, HANDLER_CONTEXT );
 513     restore_fpu( &context, HANDLER_CONTEXT );
 514 }
 515
 516 /**********************************************************************
 517  *              int_handler
 518  *
 519  * Handler for SIGINT.
 520  */
 521 static HANDLER_DEF(int_handler)
 522 {
 523     if (!dispatch_signal(SIGINT))
 524     {
 525         EXCEPTION_RECORD rec;
 526         CONTEXT context;
 527
 528         save_context( &context, HANDLER_CONTEXT );
 529         rec.ExceptionCode    = CONTROL_C_EXIT;
 530         rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 531         rec.ExceptionRecord  = NULL;
 532         rec.ExceptionAddress = (LPVOID)context.Iar;
 533         rec.NumberParameters = 0;
 534         __regs_RtlRaiseException( &rec, &context );
 535         restore_context( &context, HANDLER_CONTEXT );
 536     }
 537 }
 538
 539
 540 /**********************************************************************
 541  *              abrt_handler
 542  *
 543  * Handler for SIGABRT.
 544  */
 545 static HANDLER_DEF(abrt_handler)
 546 {
 547     EXCEPTION_RECORD rec;
 548     CONTEXT context;
 549
 550     save_context( &context, HANDLER_CONTEXT );
 551     rec.ExceptionCode    = EXCEPTION_WINE_ASSERTION;
 552     rec.ExceptionFlags   = EH_NONCONTINUABLE;
 553     rec.ExceptionRecord  = NULL;
 554     rec.ExceptionAddress = (LPVOID)context.Iar;
 555     rec.NumberParameters = 0;
 556     __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
 557     restore_context( &context, HANDLER_CONTEXT );
 558 }
 559
 560
 561 /**********************************************************************
 562  *              term_handler
 563  *
 564  * Handler for SIGTERM.
 565  */
 566 static HANDLER_DEF(term_handler)
 567 {
 568     server_abort_thread(0);
 569 }
 570
 571
 572 /**********************************************************************
 573  *              usr1_handler
 574  *
 575  * Handler for SIGUSR1, used to signal a thread that it got suspended.
 576  */
 577 static HANDLER_DEF(usr1_handler)
 578 {
 579     LARGE_INTEGER timeout;
 580
 581     /* wait with 0 timeout, will only return once the thread is no longer suspended */
 582     timeout.QuadPart = 0;
 583     NTDLL_wait_for_multiple_objects( 0, NULL, 0, &timeout, 0 );
 584 }
 585
 586
 587 /***********************************************************************
 588  *           set_handler
 589  *
 590  * Set a signal handler
 591  */
 592 static int set_handler( int sig, void (*func)() )
 593 {
 594     struct sigaction sig_act;
 595
 596     sig_act.sa_sigaction = func;
 597     sigemptyset( &sig_act.sa_mask );
 598     sigaddset( &sig_act.sa_mask, SIGINT );
 599     sigaddset( &sig_act.sa_mask, SIGALRM );
 600
 601     sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
 602     return sigaction( sig, &sig_act, NULL );
 603 }
 604
 605
 606 /***********************************************************************
 607  *           __wine_set_signal_handler   (NTDLL.@)
 608  */
 609 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
 610 {
 611     if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
 612     if (handlers[sig] != NULL) return -2;
 613     handlers[sig] = wsh;
 614     return 0;
 615 }
 616
 617
 618 /**********************************************************************
 619  *              SIGNAL_Init
 620  */
 621 BOOL SIGNAL_Init(void)
 622 {
 623     if (set_handler( SIGINT,  (void (*)())int_handler ) == -1) goto error;
 624     if (set_handler( SIGFPE,  (void (*)())fpe_handler ) == -1) goto error;
 625     if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
 626     if (set_handler( SIGILL,  (void (*)())segv_handler ) == -1) goto error;
 627     if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
 628     if (set_handler( SIGTERM, (void (*)())term_handler ) == -1) goto error;
 629     if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
 630 #ifdef SIGBUS
 631     if (set_handler( SIGBUS,  (void (*)())segv_handler ) == -1) goto error;
 632 #endif
 633 #ifdef SIGTRAP
 634     if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
 635 #endif
 636
 637     return TRUE;
 638
 639  error:
 640     perror("sigaction");
 641     return FALSE;
 642 }
 643
 644
 645 /**********************************************************************
 646  *              __wine_enter_vm86   (NTDLL.@)
 647  */
 648 void __wine_enter_vm86( CONTEXT *context )
 649 {
 650     MESSAGE("vm86 mode not supported on this platform\n");
 651 }
 652
 653 /**********************************************************************
 654  *              DbgBreakPoint   (NTDLL.@)
 655  */
 656 void WINAPI DbgBreakPoint(void)
 657 {
 658      kill(getpid(), SIGTRAP);
 659 }
 660
 661 /**********************************************************************
 662  *              DbgUserBreakPoint   (NTDLL.@)
 663  */
 664 void WINAPI DbgUserBreakPoint(void)
 665 {
 666      kill(getpid(), SIGTRAP);
 667 }
 668
 669 #endif  /* __powerpc__ */