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 # include <signal.h>
 107 typedef siginfo_t siginfo;
 108
 109 typedef struct ucontext SIGCONTEXT;
 110
 111
 112 # define HANDLER_DEF(name) void name( int __signal, siginfo *__siginfo, SIGCONTEXT *__context )
 113 # define HANDLER_CONTEXT (__context)
 114
 115 /* All Registers access - only for local access */
 116 # define REG_sig(reg_name, context)             ((context)->uc_mcontext->ss.reg_name)
 117 # define FLOATREG_sig(reg_name, context)        ((context)->uc_mcontext->fs.reg_name)
 118 # define EXCEPREG_sig(reg_name, context)        ((context)->uc_mcontext->es.reg_name)
 119 # define VECREG_sig(reg_name, context)          ((context)->uc_mcontext->vs.reg_name)
 120
 121 /* Gpr Registers access */
 122 # define GPR_sig(reg_num, context)              REG_sig(r##reg_num, context)
 123
 124 # define IAR_sig(context)                       REG_sig(srr0, context)  /* Program counter */
 125 # define MSR_sig(context)                       REG_sig(srr1, context)  /* Machine State Register (Supervisor) */
 126 # define CTR_sig(context)                       REG_sig(ctr, context)
 127
 128 # define XER_sig(context)                       REG_sig(xer, context) /* Link register */
 129 # define LR_sig(context)                        REG_sig(lr, context)  /* User's integer exception register */
 130 # define CR_sig(context)                        REG_sig(cr, context)  /* Condition register */
 131
 132 /* Float Registers access */
 133 # define FLOAT_sig(reg_num, context)            FLOATREG_sig(fpregs[reg_num], context)
 134
 135 # define FPSCR_sig(context)                     FLOATREG_sig(fpscr, context)
 136
 137 /* Exception Registers access */
 138 # define DAR_sig(context)                       EXCEPREG_sig(dar, context)     /* Fault registers for coredump */
 139 # define DSISR_sig(context)                     EXCEPREG_sig(dsisr, context)
 140 # define TRAP_sig(context)                      EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
 141
 142 /* Signal defs : Those are undefined on darwin
 143 SIGBUS
 144 #undef BUS_ADRERR
 145 #undef BUS_OBJERR
 146 SIGILL
 147 #undef ILL_ILLOPN
 148 #undef ILL_ILLTRP
 149 #undef ILL_ILLADR
 150 #undef ILL_COPROC
 151 #undef ILL_PRVREG
 152 #undef ILL_BADSTK
 153 SIGTRAP
 154 #undef TRAP_BRKPT
 155 #undef TRAP_TRACE
 156 SIGFPE
 157 */
 158
 159 #endif /* __APPLE__ */
 160
 161
 162
 163 typedef int (*wine_signal_handler)(unsigned int sig);
 164
 165 static wine_signal_handler handlers[256];
 166
 167 /***********************************************************************
 168  *           dispatch_signal
 169  */
 170 inline static int dispatch_signal(unsigned int sig)
 171 {
 172     if (handlers[sig] == NULL) return 0;
 173     return handlers[sig](sig);
 174 }
 175
 176 /***********************************************************************
 177  *           save_context
 178  *
 179  * Set the register values from a sigcontext.
 180  */
 181 static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
 182 {
 183
 184 #define C(x) context->Gpr##x = GPR_sig(x,sigcontext)
 185         /* Save Gpr registers */
 186         C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
 187         C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
 188         C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
 189         C(31);
 190 #undef C
 191
 192         context->Iar = IAR_sig(sigcontext);  /* Program Counter */
 193         context->Msr = MSR_sig(sigcontext);  /* Machine State Register (Supervisor) */
 194         context->Ctr = CTR_sig(sigcontext);
 195
 196         context->Xer = XER_sig(sigcontext);
 197         context->Lr  = LR_sig(sigcontext);
 198         context->Cr  = CR_sig(sigcontext);
 199
 200         /* Saving Exception regs */
 201         context->Dar   = DAR_sig(sigcontext);
 202         context->Dsisr = DSISR_sig(sigcontext);
 203         context->Trap  = TRAP_sig(sigcontext);
 204 }
 205
 206
 207 /***********************************************************************
 208  *           restore_context
 209  *
 210  * Build a sigcontext from the register values.
 211  */
 212 static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
 213 {
 214
 215 #define C(x)  GPR_sig(x,sigcontext) = context->Gpr##x
 216         C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
 217         C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
 218         C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
 219         C(31);
 220 #undef C
 221
 222         IAR_sig(sigcontext) = context->Iar;  /* Program Counter */
 223         MSR_sig(sigcontext) = context->Msr;  /* Machine State Register (Supervisor) */
 224         CTR_sig(sigcontext) = context->Ctr;
 225
 226         XER_sig(sigcontext) = context->Xer;
 227         LR_sig(sigcontext) = context->Lr;
 228         CR_sig(sigcontext) = context->Cr;
 229
 230         /* Setting Exception regs */
 231         DAR_sig(sigcontext) = context->Dar;
 232         DSISR_sig(sigcontext) = context->Dsisr;
 233         TRAP_sig(sigcontext) = context->Trap;
 234 }
 235
 236
 237 /***********************************************************************
 238  *           save_fpu
 239  *
 240  * Set the FPU context from a sigcontext.
 241  */
 242 inline static void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
 243 {
 244 #define C(x)   context->Fpr##x = FLOAT_sig(x,sigcontext)
 245         C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
 246         C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
 247         C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
 248         C(31);
 249 #undef C
 250         context->Fpscr = FPSCR_sig(sigcontext);
 251 }
 252
 253
 254 /***********************************************************************
 255  *           restore_fpu
 256  *
 257  * Restore the FPU context to a sigcontext.
 258  */
 259 inline static void restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
 260 {
 261 #define C(x)  FLOAT_sig(x,sigcontext) = context->Fpr##x
 262         C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
 263         C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
 264         C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
 265         C(31);
 266 #undef C
 267         FPSCR_sig(sigcontext) = context->Fpscr;
 268 }
 269
 270
 271 /***********************************************************************
 272  *              get_cpu_context
 273  *
 274  * Get the context of the current thread.
 275  */
 276 void get_cpu_context( CONTEXT *context )
 277 {
 278     FIXME("not implemented\n");
 279 }
 280
 281
 282 /***********************************************************************
 283  *           set_cpu_context
 284  *
 285  * Set the new CPU context.
 286  */
 287 void set_cpu_context( const CONTEXT *context )
 288 {
 289     FIXME("not implemented\n");
 290 }
 291
 292
 293 /**********************************************************************
 294  *              get_fpu_code
 295  *
 296  * Get the FPU exception code from the FPU status.
 297  */
 298 static inline DWORD get_fpu_code( const CONTEXT *context )
 299 {
 300     DWORD status  = context->Fpscr;
 301
 302     if (status & 0x01)  /* IE */
 303     {
 304         if (status & 0x40)  /* SF */
 305             return EXCEPTION_FLT_STACK_CHECK;
 306         else
 307             return EXCEPTION_FLT_INVALID_OPERATION;
 308     }
 309     if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND;  /* DE flag */
 310     if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO;    /* ZE flag */
 311     if (status & 0x08) return EXCEPTION_FLT_OVERFLOW;          /* OE flag */
 312     if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW;         /* UE flag */
 313     if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT;    /* PE flag */
 314     return EXCEPTION_FLT_INVALID_OPERATION;  /* generic error */
 315 }
 316
 317 /**********************************************************************
 318  *              do_segv
 319  *
 320  * Implementation of SIGSEGV handler.
 321  */
 322 static void do_segv( CONTEXT *context, int trap, int err, int code, void * addr )
 323 {
 324     EXCEPTION_RECORD rec;
 325     DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
 326
 327     rec.ExceptionRecord  = NULL;
 328     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 329     rec.ExceptionAddress = addr;
 330     rec.NumberParameters = 0;
 331
 332     switch (trap) {
 333     case SIGSEGV:
 334         switch ( code & 0xffff ) {
 335         case SEGV_MAPERR:
 336         case SEGV_ACCERR:
 337                 rec.NumberParameters = 2;
 338                 rec.ExceptionInformation[0] = 0; /* FIXME ? */
 339                 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
 340                 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
 341                         return;
 342                 rec.ExceptionCode = page_fault_code;
 343                 break;
 344         default:FIXME("Unhandled SIGSEGV/%x\n",code);
 345                 break;
 346         }
 347         break;
 348     case SIGBUS:
 349         switch ( code & 0xffff ) {
 350         case BUS_ADRALN:
 351                 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
 352                 break;
 353 #ifdef BUS_ADRERR
 354         case BUS_ADRERR:
 355 #endif
 356 #ifdef BUS_OBJERR
 357         case BUS_OBJERR:
 358                 /* FIXME: correct for all cases ? */
 359                 rec.NumberParameters = 2;
 360                 rec.ExceptionInformation[0] = 0; /* FIXME ? */
 361                 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
 362                 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
 363                         return;
 364                 rec.ExceptionCode = page_fault_code;
 365                 break;
 366 #endif
 367         default:FIXME("Unhandled SIGBUS/%x\n",code);
 368                 break;
 369         }
 370         break;
 371     case SIGILL:
 372         switch ( code & 0xffff ) {
 373         case ILL_ILLOPC: /* illegal opcode */
 374 #ifdef ILL_ILLOPN
 375         case ILL_ILLOPN: /* illegal operand */
 376 #endif
 377 #ifdef ILL_ILLADR
 378         case ILL_ILLADR: /* illegal addressing mode */
 379 #endif
 380 #ifdef ILL_ILLTRP
 381         case ILL_ILLTRP: /* illegal trap */
 382 #endif
 383 #ifdef ILL_COPROC
 384         case ILL_COPROC: /* coprocessor error */
 385 #endif
 386                 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
 387                 break;
 388         case ILL_PRVOPC: /* privileged opcode */
 389 #ifdef ILL_PRVREG
 390         case ILL_PRVREG: /* privileged register */
 391 #endif
 392                 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
 393                 break;
 394 #ifdef ILL_BADSTK
 395         case ILL_BADSTK: /* internal stack error */
 396                 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
 397                 break;
 398 #endif
 399         default:FIXME("Unhandled SIGILL/%x\n", code);
 400                 break;
 401         }
 402         break;
 403     }
 404     __regs_RtlRaiseException( &rec, context );
 405 }
 406
 407 /**********************************************************************
 408  *              do_trap
 409  *
 410  * Implementation of SIGTRAP handler.
 411  */
 412 static void do_trap( CONTEXT *context, int code, void * addr )
 413 {
 414     EXCEPTION_RECORD rec;
 415
 416     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 417     rec.ExceptionRecord  = NULL;
 418     rec.ExceptionAddress = addr;
 419     rec.NumberParameters = 0;
 420
 421     /* FIXME: check if we might need to modify PC */
 422     switch (code & 0xffff) {
 423 #ifdef TRAP_BRKPT
 424     case TRAP_BRKPT:
 425         rec.ExceptionCode = EXCEPTION_BREAKPOINT;
 426         break;
 427 #endif
 428 #ifdef TRAP_TRACE
 429     case TRAP_TRACE:
 430         rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
 431         break;
 432 #endif
 433     default:FIXME("Unhandled SIGTRAP/%x\n", code);
 434                 break;
 435     }
 436     __regs_RtlRaiseException( &rec, context );
 437 }
 438
 439 /**********************************************************************
 440  *              do_trap
 441  *
 442  * Implementation of SIGFPE handler.
 443  */
 444 static void do_fpe( CONTEXT *context, int code, void * addr )
 445 {
 446     EXCEPTION_RECORD rec;
 447
 448     switch ( code  & 0xffff ) {
 449 #ifdef FPE_FLTSUB
 450     case FPE_FLTSUB:
 451         rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
 452         break;
 453 #endif
 454 #ifdef FPE_INTDIV
 455     case FPE_INTDIV:
 456         rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
 457         break;
 458 #endif
 459 #ifdef FPE_INTOVF
 460     case FPE_INTOVF:
 461         rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
 462         break;
 463 #endif
 464 #ifdef FPE_FLTDIV
 465     case FPE_FLTDIV:
 466         rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
 467         break;
 468 #endif
 469 #ifdef FPE_FLTOVF
 470     case FPE_FLTOVF:
 471         rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
 472         break;
 473 #endif
 474 #ifdef FPE_FLTUND
 475     case FPE_FLTUND:
 476         rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
 477         break;
 478 #endif
 479 #ifdef FPE_FLTRES
 480     case FPE_FLTRES:
 481         rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
 482         break;
 483 #endif
 484 #ifdef FPE_FLTINV
 485     case FPE_FLTINV:
 486 #endif
 487     default:
 488         rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
 489         break;
 490     }
 491     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 492     rec.ExceptionRecord  = NULL;
 493     rec.ExceptionAddress = addr;
 494     rec.NumberParameters = 0;
 495     __regs_RtlRaiseException( &rec, context );
 496 }
 497
 498 /**********************************************************************
 499  *              segv_handler
 500  *
 501  * Handler for SIGSEGV and related errors.
 502  */
 503 static HANDLER_DEF(segv_handler)
 504 {
 505     CONTEXT context;
 506     save_context( &context, HANDLER_CONTEXT );
 507     do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
 508     restore_context( &context, HANDLER_CONTEXT );
 509 }
 510
 511 /**********************************************************************
 512  *              trap_handler
 513  *
 514  * Handler for SIGTRAP.
 515  */
 516 static HANDLER_DEF(trap_handler)
 517 {
 518     CONTEXT context;
 519     save_context( &context, HANDLER_CONTEXT );
 520     do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
 521     restore_context( &context, HANDLER_CONTEXT );
 522 }
 523
 524 /**********************************************************************
 525  *              fpe_handler
 526  *
 527  * Handler for SIGFPE.
 528  */
 529 static HANDLER_DEF(fpe_handler)
 530 {
 531     CONTEXT context;
 532     save_fpu( &context, HANDLER_CONTEXT );
 533     save_context( &context, HANDLER_CONTEXT );
 534     do_fpe( &context,  __siginfo->si_code, __siginfo->si_addr );
 535     restore_context( &context, HANDLER_CONTEXT );
 536     restore_fpu( &context, HANDLER_CONTEXT );
 537 }
 538
 539 /**********************************************************************
 540  *              int_handler
 541  *
 542  * Handler for SIGINT.
 543  */
 544 static HANDLER_DEF(int_handler)
 545 {
 546     if (!dispatch_signal(SIGINT))
 547     {
 548         EXCEPTION_RECORD rec;
 549         CONTEXT context;
 550
 551         save_context( &context, HANDLER_CONTEXT );
 552         rec.ExceptionCode    = CONTROL_C_EXIT;
 553         rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 554         rec.ExceptionRecord  = NULL;
 555         rec.ExceptionAddress = (LPVOID)context.Iar;
 556         rec.NumberParameters = 0;
 557         __regs_RtlRaiseException( &rec, &context );
 558         restore_context( &context, HANDLER_CONTEXT );
 559     }
 560 }
 561
 562
 563 /**********************************************************************
 564  *              abrt_handler
 565  *
 566  * Handler for SIGABRT.
 567  */
 568 static HANDLER_DEF(abrt_handler)
 569 {
 570     EXCEPTION_RECORD rec;
 571     CONTEXT context;
 572
 573     save_context( &context, HANDLER_CONTEXT );
 574     rec.ExceptionCode    = EXCEPTION_WINE_ASSERTION;
 575     rec.ExceptionFlags   = EH_NONCONTINUABLE;
 576     rec.ExceptionRecord  = NULL;
 577     rec.ExceptionAddress = (LPVOID)context.Iar;
 578     rec.NumberParameters = 0;
 579     __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
 580     restore_context( &context, HANDLER_CONTEXT );
 581 }
 582
 583
 584 /**********************************************************************
 585  *              term_handler
 586  *
 587  * Handler for SIGTERM.
 588  */
 589 static HANDLER_DEF(term_handler)
 590 {
 591     server_abort_thread(0);
 592 }
 593
 594
 595 /**********************************************************************
 596  *              usr1_handler
 597  *
 598  * Handler for SIGUSR1, used to signal a thread that it got suspended.
 599  */
 600 static HANDLER_DEF(usr1_handler)
 601 {
 602     CONTEXT context;
 603
 604     save_context( &context, HANDLER_CONTEXT );
 605     wait_suspend( &context );
 606     restore_context( &context, HANDLER_CONTEXT );
 607 }
 608
 609
 610 /**********************************************************************
 611  *              get_signal_stack_total_size
 612  *
 613  * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
 614  * Must be a power of two.
 615  */
 616 size_t get_signal_stack_total_size(void)
 617 {
 618     assert( sizeof(TEB) <= getpagesize() );
 619     return getpagesize();  /* this is just for the TEB, we don't need a signal stack */
 620 }
 621
 622
 623 /***********************************************************************
 624  *           set_handler
 625  *
 626  * Set a signal handler
 627  */
 628 static int set_handler( int sig, void (*func)() )
 629 {
 630     struct sigaction sig_act;
 631
 632     sig_act.sa_sigaction = func;
 633     sigemptyset( &sig_act.sa_mask );
 634     sigaddset( &sig_act.sa_mask, SIGINT );
 635     sigaddset( &sig_act.sa_mask, SIGALRM );
 636
 637     sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
 638     return sigaction( sig, &sig_act, NULL );
 639 }
 640
 641
 642 /***********************************************************************
 643  *           __wine_set_signal_handler   (NTDLL.@)
 644  */
 645 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
 646 {
 647     if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
 648     if (handlers[sig] != NULL) return -2;
 649     handlers[sig] = wsh;
 650     return 0;
 651 }
 652
 653
 654 /**********************************************************************
 655  *              SIGNAL_Init
 656  */
 657 BOOL SIGNAL_Init(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( SIGTERM, (void (*)())term_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
 673     return TRUE;
 674
 675  error:
 676     perror("sigaction");
 677     return FALSE;
 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__ */