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     DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
 325
 326     rec.ExceptionRecord  = NULL;
 327     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 328     rec.ExceptionAddress = addr;
 329     rec.NumberParameters = 0;
 330
 331     switch (trap) {
 332     case SIGSEGV:
 333         switch ( code & 0xffff ) {
 334         case SEGV_MAPERR:
 335         case SEGV_ACCERR:
 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         default:FIXME("Unhandled SIGSEGV/%x\n",code);
 344                 break;
 345         }
 346         break;
 347     case SIGBUS:
 348         switch ( code & 0xffff ) {
 349         case BUS_ADRALN:
 350                 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
 351                 break;
 352 #ifdef BUS_ADRERR
 353         case BUS_ADRERR:
 354 #endif
 355 #ifdef BUS_OBJERR
 356         case BUS_OBJERR:
 357                 /* FIXME: correct for all cases ? */
 358                 rec.NumberParameters = 2;
 359                 rec.ExceptionInformation[0] = 0; /* FIXME ? */
 360                 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
 361                 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
 362                         return;
 363                 rec.ExceptionCode = page_fault_code;
 364                 break;
 365 #endif
 366         default:FIXME("Unhandled SIGBUS/%x\n",code);
 367                 break;
 368         }
 369         break;
 370     case SIGILL:
 371         switch ( code & 0xffff ) {
 372         case ILL_ILLOPC: /* illegal opcode */
 373 #ifdef ILL_ILLOPN
 374         case ILL_ILLOPN: /* illegal operand */
 375 #endif
 376 #ifdef ILL_ILLADR
 377         case ILL_ILLADR: /* illegal addressing mode */
 378 #endif
 379 #ifdef ILL_ILLTRP
 380         case ILL_ILLTRP: /* illegal trap */
 381 #endif
 382 #ifdef ILL_COPROC
 383         case ILL_COPROC: /* coprocessor error */
 384 #endif
 385                 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
 386                 break;
 387         case ILL_PRVOPC: /* privileged opcode */
 388 #ifdef ILL_PRVREG
 389         case ILL_PRVREG: /* privileged register */
 390 #endif
 391                 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
 392                 break;
 393 #ifdef ILL_BADSTK
 394         case ILL_BADSTK: /* internal stack error */
 395                 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
 396                 break;
 397 #endif
 398         default:FIXME("Unhandled SIGILL/%x\n", code);
 399                 break;
 400         }
 401         break;
 402     }
 403     __regs_RtlRaiseException( &rec, context );
 404 }
 405
 406 /**********************************************************************
 407  *              do_trap
 408  *
 409  * Implementation of SIGTRAP handler.
 410  */
 411 static void do_trap( CONTEXT *context, int code, void * addr )
 412 {
 413     EXCEPTION_RECORD rec;
 414
 415     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 416     rec.ExceptionRecord  = NULL;
 417     rec.ExceptionAddress = addr;
 418     rec.NumberParameters = 0;
 419
 420     /* FIXME: check if we might need to modify PC */
 421     switch (code & 0xffff) {
 422 #ifdef TRAP_BRKPT
 423     case TRAP_BRKPT:
 424         rec.ExceptionCode = EXCEPTION_BREAKPOINT;
 425         break;
 426 #endif
 427 #ifdef TRAP_TRACE
 428     case TRAP_TRACE:
 429         rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
 430         break;
 431 #endif
 432     default:FIXME("Unhandled SIGTRAP/%x\n", code);
 433                 break;
 434     }
 435     __regs_RtlRaiseException( &rec, context );
 436 }
 437
 438 /**********************************************************************
 439  *              do_trap
 440  *
 441  * Implementation of SIGFPE handler.
 442  */
 443 static void do_fpe( CONTEXT *context, int code, void * addr )
 444 {
 445     EXCEPTION_RECORD rec;
 446
 447     switch ( code  & 0xffff ) {
 448 #ifdef FPE_FLTSUB
 449     case FPE_FLTSUB:
 450         rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
 451         break;
 452 #endif
 453 #ifdef FPE_INTDIV
 454     case FPE_INTDIV:
 455         rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
 456         break;
 457 #endif
 458 #ifdef FPE_INTOVF
 459     case FPE_INTOVF:
 460         rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
 461         break;
 462 #endif
 463 #ifdef FPE_FLTDIV
 464     case FPE_FLTDIV:
 465         rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
 466         break;
 467 #endif
 468 #ifdef FPE_FLTOVF
 469     case FPE_FLTOVF:
 470         rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
 471         break;
 472 #endif
 473 #ifdef FPE_FLTUND
 474     case FPE_FLTUND:
 475         rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
 476         break;
 477 #endif
 478 #ifdef FPE_FLTRES
 479     case FPE_FLTRES:
 480         rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
 481         break;
 482 #endif
 483 #ifdef FPE_FLTINV
 484     case FPE_FLTINV:
 485 #endif
 486     default:
 487         rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
 488         break;
 489     }
 490     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 491     rec.ExceptionRecord  = NULL;
 492     rec.ExceptionAddress = addr;
 493     rec.NumberParameters = 0;
 494     __regs_RtlRaiseException( &rec, context );
 495 }
 496
 497 /**********************************************************************
 498  *              segv_handler
 499  *
 500  * Handler for SIGSEGV and related errors.
 501  */
 502 static HANDLER_DEF(segv_handler)
 503 {
 504     CONTEXT context;
 505     save_context( &context, HANDLER_CONTEXT );
 506     do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
 507     restore_context( &context, HANDLER_CONTEXT );
 508 }
 509
 510 /**********************************************************************
 511  *              trap_handler
 512  *
 513  * Handler for SIGTRAP.
 514  */
 515 static HANDLER_DEF(trap_handler)
 516 {
 517     CONTEXT context;
 518     save_context( &context, HANDLER_CONTEXT );
 519     do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
 520     restore_context( &context, HANDLER_CONTEXT );
 521 }
 522
 523 /**********************************************************************
 524  *              fpe_handler
 525  *
 526  * Handler for SIGFPE.
 527  */
 528 static HANDLER_DEF(fpe_handler)
 529 {
 530     CONTEXT context;
 531     save_fpu( &context, HANDLER_CONTEXT );
 532     save_context( &context, HANDLER_CONTEXT );
 533     do_fpe( &context,  __siginfo->si_code, __siginfo->si_addr );
 534     restore_context( &context, HANDLER_CONTEXT );
 535     restore_fpu( &context, HANDLER_CONTEXT );
 536 }
 537
 538 /**********************************************************************
 539  *              int_handler
 540  *
 541  * Handler for SIGINT.
 542  */
 543 static HANDLER_DEF(int_handler)
 544 {
 545     if (!dispatch_signal(SIGINT))
 546     {
 547         EXCEPTION_RECORD rec;
 548         CONTEXT context;
 549
 550         save_context( &context, HANDLER_CONTEXT );
 551         rec.ExceptionCode    = CONTROL_C_EXIT;
 552         rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 553         rec.ExceptionRecord  = NULL;
 554         rec.ExceptionAddress = (LPVOID)context.Iar;
 555         rec.NumberParameters = 0;
 556         __regs_RtlRaiseException( &rec, &context );
 557         restore_context( &context, HANDLER_CONTEXT );
 558     }
 559 }
 560
 561
 562 /**********************************************************************
 563  *              abrt_handler
 564  *
 565  * Handler for SIGABRT.
 566  */
 567 static HANDLER_DEF(abrt_handler)
 568 {
 569     EXCEPTION_RECORD rec;
 570     CONTEXT context;
 571
 572     save_context( &context, HANDLER_CONTEXT );
 573     rec.ExceptionCode    = EXCEPTION_WINE_ASSERTION;
 574     rec.ExceptionFlags   = EH_NONCONTINUABLE;
 575     rec.ExceptionRecord  = NULL;
 576     rec.ExceptionAddress = (LPVOID)context.Iar;
 577     rec.NumberParameters = 0;
 578     __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
 579     restore_context( &context, HANDLER_CONTEXT );
 580 }
 581
 582
 583 /**********************************************************************
 584  *              term_handler
 585  *
 586  * Handler for SIGTERM.
 587  */
 588 static HANDLER_DEF(term_handler)
 589 {
 590     server_abort_thread(0);
 591 }
 592
 593
 594 /**********************************************************************
 595  *              usr1_handler
 596  *
 597  * Handler for SIGUSR1, used to signal a thread that it got suspended.
 598  */
 599 static HANDLER_DEF(usr1_handler)
 600 {
 601     CONTEXT context;
 602
 603     save_context( &context, HANDLER_CONTEXT );
 604     wait_suspend( &context );
 605     restore_context( &context, HANDLER_CONTEXT );
 606 }
 607
 608
 609 /**********************************************************************
 610  *              get_signal_stack_total_size
 611  *
 612  * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
 613  * Must be a power of two.
 614  */
 615 size_t get_signal_stack_total_size(void)
 616 {
 617     assert( sizeof(TEB) <= getpagesize() );
 618     return getpagesize();  /* this is just for the TEB, we don't need a signal stack */
 619 }
 620
 621
 622 /***********************************************************************
 623  *           set_handler
 624  *
 625  * Set a signal handler
 626  */
 627 static int set_handler( int sig, void (*func)() )
 628 {
 629     struct sigaction sig_act;
 630
 631     sig_act.sa_sigaction = func;
 632     sig_act.sa_mask = server_block_set;
 633     sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
 634     return sigaction( sig, &sig_act, NULL );
 635 }
 636
 637
 638 /***********************************************************************
 639  *           __wine_set_signal_handler   (NTDLL.@)
 640  */
 641 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
 642 {
 643     if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
 644     if (handlers[sig] != NULL) return -2;
 645     handlers[sig] = wsh;
 646     return 0;
 647 }
 648
 649
 650 /**********************************************************************
 651  *              SIGNAL_Init
 652  */
 653 BOOL SIGNAL_Init(void)
 654 {
 655     if (set_handler( SIGINT,  (void (*)())int_handler ) == -1) goto error;
 656     if (set_handler( SIGFPE,  (void (*)())fpe_handler ) == -1) goto error;
 657     if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
 658     if (set_handler( SIGILL,  (void (*)())segv_handler ) == -1) goto error;
 659     if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
 660     if (set_handler( SIGTERM, (void (*)())term_handler ) == -1) goto error;
 661     if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
 662 #ifdef SIGBUS
 663     if (set_handler( SIGBUS,  (void (*)())segv_handler ) == -1) goto error;
 664 #endif
 665 #ifdef SIGTRAP
 666     if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
 667 #endif
 668
 669     return TRUE;
 670
 671  error:
 672     perror("sigaction");
 673     return FALSE;
 674 }
 675
 676
 677 /**********************************************************************
 678  *              __wine_enter_vm86   (NTDLL.@)
 679  */
 680 void __wine_enter_vm86( CONTEXT *context )
 681 {
 682     MESSAGE("vm86 mode not supported on this platform\n");
 683 }
 684
 685 /**********************************************************************
 686  *              DbgBreakPoint   (NTDLL.@)
 687  */
 688 void WINAPI DbgBreakPoint(void)
 689 {
 690      kill(getpid(), SIGTRAP);
 691 }
 692
 693 /**********************************************************************
 694  *              DbgUserBreakPoint   (NTDLL.@)
 695  */
 696 void WINAPI DbgUserBreakPoint(void)
 697 {
 698      kill(getpid(), SIGTRAP);
 699 }
 700
 701 #endif  /* __powerpc__ */