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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #ifdef __powerpc__
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <assert.h>
  27 #include <signal.h>
  28 #include <stdlib.h>
  29 #include <stdarg.h>
  30 #include <stdio.h>
  31 #ifdef HAVE_UNISTD_H
  32 # include <unistd.h>
  33 #endif
  34
  35 #ifdef HAVE_SYS_PARAM_H
  36 # include <sys/param.h>
  37 #endif
  38 #ifdef HAVE_SYSCALL_H
  39 # include <syscall.h>
  40 #else
  41 # ifdef HAVE_SYS_SYSCALL_H
  42 #  include <sys/syscall.h>
  43 # endif
  44 #endif
  45
  46 #ifdef HAVE_SYS_VM86_H
  47 # include <sys/vm86.h>
  48 #endif
  49
  50 #ifdef HAVE_SYS_SIGNAL_H
  51 # include <sys/signal.h>
  52 #endif
  53
  54 #include "windef.h"
  55 #include "winternl.h"
  56 #include "wine/library.h"
  57 #include "wine/exception.h"
  58 #include "ntdll_misc.h"
  59 #include "wine/debug.h"
  60
  61 WINE_DEFAULT_DEBUG_CHANNEL(seh);
  62
  63
  64 /***********************************************************************
  65  * signal context platform-specific definitions
  66  */
  67 #ifdef linux
  68
  69 typedef struct ucontext SIGCONTEXT;
  70
  71 # define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, SIGCONTEXT *__context )
  72 # define HANDLER_CONTEXT (__context)
  73
  74 /* All Registers access - only for local access */
  75 # define REG_sig(reg_name, context)             ((context)->uc_mcontext.regs->reg_name)
  76
  77
  78 /* Gpr Registers access  */
  79 # define GPR_sig(reg_num, context)              REG_sig(gpr[reg_num], context)
  80
  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 */
  84
  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 */
  88
  89 /* Float Registers access  */
  90 # define FLOAT_sig(reg_num, context)            (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
  91
  92 # define FPSCR_sig(context)                     (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
  93
  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)
  98
  99 #endif /* linux */
 100
 101 #ifdef __APPLE__
 102
 103 # include <sys/ucontext.h>
 104
 105 # include <sys/types.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 static inline 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 static inline 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 static inline 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_cpu_context
 272  *
 273  * Get the context of the current thread.
 274  */
 275 void get_cpu_context( CONTEXT *context )
 276 {
 277     FIXME("not implemented\n");
 278 }
 279
 280
 281 /***********************************************************************
 282  *           set_cpu_context
 283  *
 284  * Set the new CPU context.
 285  */
 286 void set_cpu_context( const CONTEXT *context )
 287 {
 288     FIXME("not implemented\n");
 289 }
 290
 291
 292 /**********************************************************************
 293  *              get_fpu_code
 294  *
 295  * Get the FPU exception code from the FPU status.
 296  */
 297 static inline DWORD get_fpu_code( const CONTEXT *context )
 298 {
 299     DWORD status  = context->Fpscr;
 300
 301     if (status & 0x01)  /* IE */
 302     {
 303         if (status & 0x40)  /* SF */
 304             return EXCEPTION_FLT_STACK_CHECK;
 305         else
 306             return EXCEPTION_FLT_INVALID_OPERATION;
 307     }
 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 */
 314 }
 315
 316 /**********************************************************************
 317  *              do_segv
 318  *
 319  * Implementation of SIGSEGV handler.
 320  */
 321 static void do_segv( CONTEXT *context, int trap, int err, int code, void * addr )
 322 {
 323     EXCEPTION_RECORD rec;
 324
 325     rec.ExceptionRecord  = NULL;
 326     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 327     rec.ExceptionAddress = addr;
 328     rec.NumberParameters = 0;
 329
 330     switch (trap) {
 331     case SIGSEGV:
 332         switch ( code & 0xffff ) {
 333         case SEGV_MAPERR:
 334         case SEGV_ACCERR:
 335                 rec.NumberParameters = 2;
 336                 rec.ExceptionInformation[0] = 0; /* FIXME ? */
 337                 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
 338                 if (!(rec.ExceptionCode = virtual_handle_fault(addr, rec.ExceptionInformation[0])))
 339                         return;
 340                 break;
 341         default:FIXME("Unhandled SIGSEGV/%x\n",code);
 342                 break;
 343         }
 344         break;
 345     case SIGBUS:
 346         switch ( code & 0xffff ) {
 347         case BUS_ADRALN:
 348                 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
 349                 break;
 350 #ifdef BUS_ADRERR
 351         case BUS_ADRERR:
 352 #endif
 353 #ifdef BUS_OBJERR
 354         case BUS_OBJERR:
 355                 /* FIXME: correct for all cases ? */
 356                 rec.NumberParameters = 2;
 357                 rec.ExceptionInformation[0] = 0; /* FIXME ? */
 358                 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
 359                 if (!(rec.ExceptionCode = virtual_handle_fault(addr, rec.ExceptionInformation[0])))
 360                         return;
 361                 break;
 362 #endif
 363         default:FIXME("Unhandled SIGBUS/%x\n",code);
 364                 break;
 365         }
 366         break;
 367     case SIGILL:
 368         switch ( code & 0xffff ) {
 369         case ILL_ILLOPC: /* illegal opcode */
 370 #ifdef ILL_ILLOPN
 371         case ILL_ILLOPN: /* illegal operand */
 372 #endif
 373 #ifdef ILL_ILLADR
 374         case ILL_ILLADR: /* illegal addressing mode */
 375 #endif
 376 #ifdef ILL_ILLTRP
 377         case ILL_ILLTRP: /* illegal trap */
 378 #endif
 379 #ifdef ILL_COPROC
 380         case ILL_COPROC: /* coprocessor error */
 381 #endif
 382                 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
 383                 break;
 384         case ILL_PRVOPC: /* privileged opcode */
 385 #ifdef ILL_PRVREG
 386         case ILL_PRVREG: /* privileged register */
 387 #endif
 388                 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
 389                 break;
 390 #ifdef ILL_BADSTK
 391         case ILL_BADSTK: /* internal stack error */
 392                 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
 393                 break;
 394 #endif
 395         default:FIXME("Unhandled SIGILL/%x\n", code);
 396                 break;
 397         }
 398         break;
 399     }
 400     __regs_RtlRaiseException( &rec, context );
 401 }
 402
 403 /**********************************************************************
 404  *              do_trap
 405  *
 406  * Implementation of SIGTRAP handler.
 407  */
 408 static void do_trap( CONTEXT *context, int code, void * addr )
 409 {
 410     EXCEPTION_RECORD rec;
 411
 412     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 413     rec.ExceptionRecord  = NULL;
 414     rec.ExceptionAddress = addr;
 415     rec.NumberParameters = 0;
 416
 417     /* FIXME: check if we might need to modify PC */
 418     switch (code & 0xffff) {
 419 #ifdef TRAP_BRKPT
 420     case TRAP_BRKPT:
 421         rec.ExceptionCode = EXCEPTION_BREAKPOINT;
 422         break;
 423 #endif
 424 #ifdef TRAP_TRACE
 425     case TRAP_TRACE:
 426         rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
 427         break;
 428 #endif
 429     default:FIXME("Unhandled SIGTRAP/%x\n", code);
 430                 break;
 431     }
 432     __regs_RtlRaiseException( &rec, context );
 433 }
 434
 435 /**********************************************************************
 436  *              do_trap
 437  *
 438  * Implementation of SIGFPE handler.
 439  */
 440 static void do_fpe( CONTEXT *context, int code, void * addr )
 441 {
 442     EXCEPTION_RECORD rec;
 443
 444     switch ( code  & 0xffff ) {
 445 #ifdef FPE_FLTSUB
 446     case FPE_FLTSUB:
 447         rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
 448         break;
 449 #endif
 450 #ifdef FPE_INTDIV
 451     case FPE_INTDIV:
 452         rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
 453         break;
 454 #endif
 455 #ifdef FPE_INTOVF
 456     case FPE_INTOVF:
 457         rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
 458         break;
 459 #endif
 460 #ifdef FPE_FLTDIV
 461     case FPE_FLTDIV:
 462         rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
 463         break;
 464 #endif
 465 #ifdef FPE_FLTOVF
 466     case FPE_FLTOVF:
 467         rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
 468         break;
 469 #endif
 470 #ifdef FPE_FLTUND
 471     case FPE_FLTUND:
 472         rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
 473         break;
 474 #endif
 475 #ifdef FPE_FLTRES
 476     case FPE_FLTRES:
 477         rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
 478         break;
 479 #endif
 480 #ifdef FPE_FLTINV
 481     case FPE_FLTINV:
 482 #endif
 483     default:
 484         rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
 485         break;
 486     }
 487     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 488     rec.ExceptionRecord  = NULL;
 489     rec.ExceptionAddress = addr;
 490     rec.NumberParameters = 0;
 491     __regs_RtlRaiseException( &rec, context );
 492 }
 493
 494 /**********************************************************************
 495  *              segv_handler
 496  *
 497  * Handler for SIGSEGV and related errors.
 498  */
 499 static HANDLER_DEF(segv_handler)
 500 {
 501     CONTEXT context;
 502     save_context( &context, HANDLER_CONTEXT );
 503     do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
 504     restore_context( &context, HANDLER_CONTEXT );
 505 }
 506
 507 /**********************************************************************
 508  *              trap_handler
 509  *
 510  * Handler for SIGTRAP.
 511  */
 512 static HANDLER_DEF(trap_handler)
 513 {
 514     CONTEXT context;
 515     save_context( &context, HANDLER_CONTEXT );
 516     do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
 517     restore_context( &context, HANDLER_CONTEXT );
 518 }
 519
 520 /**********************************************************************
 521  *              fpe_handler
 522  *
 523  * Handler for SIGFPE.
 524  */
 525 static HANDLER_DEF(fpe_handler)
 526 {
 527     CONTEXT context;
 528     save_fpu( &context, HANDLER_CONTEXT );
 529     save_context( &context, HANDLER_CONTEXT );
 530     do_fpe( &context,  __siginfo->si_code, __siginfo->si_addr );
 531     restore_context( &context, HANDLER_CONTEXT );
 532     restore_fpu( &context, HANDLER_CONTEXT );
 533 }
 534
 535 /**********************************************************************
 536  *              int_handler
 537  *
 538  * Handler for SIGINT.
 539  */
 540 static HANDLER_DEF(int_handler)
 541 {
 542     if (!dispatch_signal(SIGINT))
 543     {
 544         EXCEPTION_RECORD rec;
 545         CONTEXT context;
 546
 547         save_context( &context, HANDLER_CONTEXT );
 548         rec.ExceptionCode    = CONTROL_C_EXIT;
 549         rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 550         rec.ExceptionRecord  = NULL;
 551         rec.ExceptionAddress = (LPVOID)context.Iar;
 552         rec.NumberParameters = 0;
 553         __regs_RtlRaiseException( &rec, &context );
 554         restore_context( &context, HANDLER_CONTEXT );
 555     }
 556 }
 557
 558
 559 /**********************************************************************
 560  *              abrt_handler
 561  *
 562  * Handler for SIGABRT.
 563  */
 564 static HANDLER_DEF(abrt_handler)
 565 {
 566     EXCEPTION_RECORD rec;
 567     CONTEXT context;
 568
 569     save_context( &context, HANDLER_CONTEXT );
 570     rec.ExceptionCode    = EXCEPTION_WINE_ASSERTION;
 571     rec.ExceptionFlags   = EH_NONCONTINUABLE;
 572     rec.ExceptionRecord  = NULL;
 573     rec.ExceptionAddress = (LPVOID)context.Iar;
 574     rec.NumberParameters = 0;
 575     __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
 576     restore_context( &context, HANDLER_CONTEXT );
 577 }
 578
 579
 580 /**********************************************************************
 581  *              quit_handler
 582  *
 583  * Handler for SIGQUIT.
 584  */
 585 static HANDLER_DEF(quit_handler)
 586 {
 587     server_abort_thread(0);
 588 }
 589
 590
 591 /**********************************************************************
 592  *              usr1_handler
 593  *
 594  * Handler for SIGUSR1, used to signal a thread that it got suspended.
 595  */
 596 static HANDLER_DEF(usr1_handler)
 597 {
 598     CONTEXT context;
 599
 600     save_context( &context, HANDLER_CONTEXT );
 601     wait_suspend( &context );
 602     restore_context( &context, HANDLER_CONTEXT );
 603 }
 604
 605
 606 /**********************************************************************
 607  *              get_signal_stack_total_size
 608  *
 609  * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
 610  * Must be a power of two.
 611  */
 612 size_t get_signal_stack_total_size(void)
 613 {
 614     assert( sizeof(TEB) <= getpagesize() );
 615     return getpagesize();  /* this is just for the TEB, we don't need a signal stack */
 616 }
 617
 618
 619 /***********************************************************************
 620  *           set_handler
 621  *
 622  * Set a signal handler
 623  */
 624 static int set_handler( int sig, void (*func)() )
 625 {
 626     struct sigaction sig_act;
 627
 628     sig_act.sa_sigaction = func;
 629     sig_act.sa_mask = server_block_set;
 630     sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
 631     return sigaction( sig, &sig_act, NULL );
 632 }
 633
 634
 635 /***********************************************************************
 636  *           __wine_set_signal_handler   (NTDLL.@)
 637  */
 638 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
 639 {
 640     if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
 641     if (handlers[sig] != NULL) return -2;
 642     handlers[sig] = wsh;
 643     return 0;
 644 }
 645
 646
 647 /**********************************************************************
 648  *              signal_init_thread
 649  */
 650 void signal_init_thread(void)
 651 {
 652 }
 653
 654 /**********************************************************************
 655  *              signal_init_process
 656  */
 657 void signal_init_process(void)
 658 {
 659     if (set_handler( SIGINT,  (void (*)())int_handler ) == -1) goto error;
 660     if (set_handler( SIGFPE,  (void (*)())fpe_handler ) == -1) goto error;
 661     if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
 662     if (set_handler( SIGILL,  (void (*)())segv_handler ) == -1) goto error;
 663     if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
 664     if (set_handler( SIGQUIT, (void (*)())quit_handler ) == -1) goto error;
 665     if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
 666 #ifdef SIGBUS
 667     if (set_handler( SIGBUS,  (void (*)())segv_handler ) == -1) goto error;
 668 #endif
 669 #ifdef SIGTRAP
 670     if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
 671 #endif
 672     signal_init_thread();
 673     return;
 674
 675  error:
 676     perror("sigaction");
 677     exit(1);
 678 }
 679
 680
 681 /**********************************************************************
 682  *              __wine_enter_vm86   (NTDLL.@)
 683  */
 684 void __wine_enter_vm86( CONTEXT *context )
 685 {
 686     MESSAGE("vm86 mode not supported on this platform\n");
 687 }
 688
 689 /**********************************************************************
 690  *              DbgBreakPoint   (NTDLL.@)
 691  */
 692 void WINAPI DbgBreakPoint(void)
 693 {
 694      kill(getpid(), SIGTRAP);
 695 }
 696
 697 /**********************************************************************
 698  *              DbgUserBreakPoint   (NTDLL.@)
 699  */
 700 void WINAPI DbgUserBreakPoint(void)
 701 {
 702      kill(getpid(), SIGTRAP);
 703 }
 704
 705 #endif  /* __powerpc__ */