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 <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_fpu_code
 273  *
 274  * Get the FPU exception code from the FPU status.
 275  */
 276 static inline DWORD get_fpu_code( const CONTEXT *context )
 277 {
 278     DWORD status  = context->Fpscr;
 279
 280     if (status & 0x01)  /* IE */
 281     {
 282         if (status & 0x40)  /* SF */
 283             return EXCEPTION_FLT_STACK_CHECK;
 284         else
 285             return EXCEPTION_FLT_INVALID_OPERATION;
 286     }
 287     if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND;  /* DE flag */
 288     if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO;    /* ZE flag */
 289     if (status & 0x08) return EXCEPTION_FLT_OVERFLOW;          /* OE flag */
 290     if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW;         /* UE flag */
 291     if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT;    /* PE flag */
 292     return EXCEPTION_FLT_INVALID_OPERATION;  /* generic error */
 293 }
 294
 295 /**********************************************************************
 296  *              do_segv
 297  *
 298  * Implementation of SIGSEGV handler.
 299  */
 300 static void do_segv( CONTEXT *context, int trap, int err, int code, void * addr )
 301 {
 302     EXCEPTION_RECORD rec;
 303     DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
 304
 305     rec.ExceptionRecord  = NULL;
 306     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 307     rec.ExceptionAddress = addr;
 308     rec.NumberParameters = 0;
 309
 310     switch (trap) {
 311     case SIGSEGV:
 312         switch ( code & 0xffff ) {
 313         case SEGV_MAPERR:
 314         case SEGV_ACCERR:
 315                 rec.NumberParameters = 2;
 316                 rec.ExceptionInformation[0] = 0; /* FIXME ? */
 317                 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
 318                 if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
 319                         return;
 320                 rec.ExceptionCode = page_fault_code;
 321                 break;
 322         default:FIXME("Unhandled SIGSEGV/%x\n",code);
 323                 break;
 324         }
 325         break;
 326     case SIGBUS:
 327         switch ( code & 0xffff ) {
 328         case BUS_ADRALN:
 329                 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
 330                 break;
 331 #ifdef BUS_ADRERR
 332         case BUS_ADRERR:
 333 #endif
 334 #ifdef BUS_OBJERR
 335         case BUS_OBJERR:
 336                 /* FIXME: correct for all cases ? */
 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 #endif
 345         default:FIXME("Unhandled SIGBUS/%x\n",code);
 346                 break;
 347         }
 348         break;
 349     case SIGILL:
 350         switch ( code & 0xffff ) {
 351         case ILL_ILLOPC: /* illegal opcode */
 352 #ifdef ILL_ILLOPN
 353         case ILL_ILLOPN: /* illegal operand */
 354 #endif
 355 #ifdef ILL_ILLADR
 356         case ILL_ILLADR: /* illegal addressing mode */
 357 #endif
 358 #ifdef ILL_ILLTRP
 359         case ILL_ILLTRP: /* illegal trap */
 360 #endif
 361 #ifdef ILL_COPROC
 362         case ILL_COPROC: /* coprocessor error */
 363 #endif
 364                 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
 365                 break;
 366         case ILL_PRVOPC: /* privileged opcode */
 367 #ifdef ILL_PRVREG
 368         case ILL_PRVREG: /* privileged register */
 369 #endif
 370                 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
 371                 break;
 372 #ifdef ILL_BADSTK
 373         case ILL_BADSTK: /* internal stack error */
 374                 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
 375                 break;
 376 #endif
 377         default:FIXME("Unhandled SIGILL/%x\n", code);
 378                 break;
 379         }
 380         break;
 381     }
 382     __regs_RtlRaiseException( &rec, context );
 383 }
 384
 385 /**********************************************************************
 386  *              do_trap
 387  *
 388  * Implementation of SIGTRAP handler.
 389  */
 390 static void do_trap( CONTEXT *context, int code, void * addr )
 391 {
 392     EXCEPTION_RECORD rec;
 393
 394     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 395     rec.ExceptionRecord  = NULL;
 396     rec.ExceptionAddress = addr;
 397     rec.NumberParameters = 0;
 398
 399     /* FIXME: check if we might need to modify PC */
 400     switch (code & 0xffff) {
 401 #ifdef TRAP_BRKPT
 402     case TRAP_BRKPT:
 403         rec.ExceptionCode = EXCEPTION_BREAKPOINT;
 404         break;
 405 #endif
 406 #ifdef TRAP_TRACE
 407     case TRAP_TRACE:
 408         rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
 409         break;
 410 #endif
 411     default:FIXME("Unhandled SIGTRAP/%x\n", code);
 412                 break;
 413     }
 414     __regs_RtlRaiseException( &rec, context );
 415 }
 416
 417 /**********************************************************************
 418  *              do_trap
 419  *
 420  * Implementation of SIGFPE handler.
 421  */
 422 static void do_fpe( CONTEXT *context, int code, void * addr )
 423 {
 424     EXCEPTION_RECORD rec;
 425
 426     switch ( code  & 0xffff ) {
 427 #ifdef FPE_FLTSUB
 428     case FPE_FLTSUB:
 429         rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
 430         break;
 431 #endif
 432 #ifdef FPE_INTDIV
 433     case FPE_INTDIV:
 434         rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
 435         break;
 436 #endif
 437 #ifdef FPE_INTOVF
 438     case FPE_INTOVF:
 439         rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
 440         break;
 441 #endif
 442 #ifdef FPE_FLTDIV
 443     case FPE_FLTDIV:
 444         rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
 445         break;
 446 #endif
 447 #ifdef FPE_FLTOVF
 448     case FPE_FLTOVF:
 449         rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
 450         break;
 451 #endif
 452 #ifdef FPE_FLTUND
 453     case FPE_FLTUND:
 454         rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
 455         break;
 456 #endif
 457 #ifdef FPE_FLTRES
 458     case FPE_FLTRES:
 459         rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
 460         break;
 461 #endif
 462 #ifdef FPE_FLTINV
 463     case FPE_FLTINV:
 464 #endif
 465     default:
 466         rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
 467         break;
 468     }
 469     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 470     rec.ExceptionRecord  = NULL;
 471     rec.ExceptionAddress = addr;
 472     rec.NumberParameters = 0;
 473     __regs_RtlRaiseException( &rec, context );
 474 }
 475
 476 /**********************************************************************
 477  *              segv_handler
 478  *
 479  * Handler for SIGSEGV and related errors.
 480  */
 481 static HANDLER_DEF(segv_handler)
 482 {
 483     CONTEXT context;
 484     save_context( &context, HANDLER_CONTEXT );
 485     do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
 486     restore_context( &context, HANDLER_CONTEXT );
 487 }
 488
 489 /**********************************************************************
 490  *              trap_handler
 491  *
 492  * Handler for SIGTRAP.
 493  */
 494 static HANDLER_DEF(trap_handler)
 495 {
 496     CONTEXT context;
 497     save_context( &context, HANDLER_CONTEXT );
 498     do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
 499     restore_context( &context, HANDLER_CONTEXT );
 500 }
 501
 502 /**********************************************************************
 503  *              fpe_handler
 504  *
 505  * Handler for SIGFPE.
 506  */
 507 static HANDLER_DEF(fpe_handler)
 508 {
 509     CONTEXT context;
 510     save_fpu( &context, HANDLER_CONTEXT );
 511     save_context( &context, HANDLER_CONTEXT );
 512     do_fpe( &context,  __siginfo->si_code, __siginfo->si_addr );
 513     restore_context( &context, HANDLER_CONTEXT );
 514     restore_fpu( &context, HANDLER_CONTEXT );
 515 }
 516
 517 /**********************************************************************
 518  *              int_handler
 519  *
 520  * Handler for SIGINT.
 521  */
 522 static HANDLER_DEF(int_handler)
 523 {
 524     if (!dispatch_signal(SIGINT))
 525     {
 526         EXCEPTION_RECORD rec;
 527         CONTEXT context;
 528
 529         save_context( &context, HANDLER_CONTEXT );
 530         rec.ExceptionCode    = CONTROL_C_EXIT;
 531         rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 532         rec.ExceptionRecord  = NULL;
 533         rec.ExceptionAddress = (LPVOID)context.Iar;
 534         rec.NumberParameters = 0;
 535         __regs_RtlRaiseException( &rec, &context );
 536         restore_context( &context, HANDLER_CONTEXT );
 537     }
 538 }
 539
 540
 541 /**********************************************************************
 542  *              abrt_handler
 543  *
 544  * Handler for SIGABRT.
 545  */
 546 static HANDLER_DEF(abrt_handler)
 547 {
 548     EXCEPTION_RECORD rec;
 549     CONTEXT context;
 550
 551     save_context( &context, HANDLER_CONTEXT );
 552     rec.ExceptionCode    = EXCEPTION_WINE_ASSERTION;
 553     rec.ExceptionFlags   = EH_NONCONTINUABLE;
 554     rec.ExceptionRecord  = NULL;
 555     rec.ExceptionAddress = (LPVOID)context.Iar;
 556     rec.NumberParameters = 0;
 557     __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
 558     restore_context( &context, HANDLER_CONTEXT );
 559 }
 560
 561
 562 /**********************************************************************
 563  *              term_handler
 564  *
 565  * Handler for SIGTERM.
 566  */
 567 static HANDLER_DEF(term_handler)
 568 {
 569     server_abort_thread(0);
 570 }
 571
 572
 573 /**********************************************************************
 574  *              usr1_handler
 575  *
 576  * Handler for SIGUSR1, used to signal a thread that it got suspended.
 577  */
 578 static HANDLER_DEF(usr1_handler)
 579 {
 580     LARGE_INTEGER timeout;
 581
 582     /* wait with 0 timeout, will only return once the thread is no longer suspended */
 583     timeout.QuadPart = 0;
 584     NTDLL_wait_for_multiple_objects( 0, NULL, 0, &timeout, 0 );
 585 }
 586
 587
 588 /**********************************************************************
 589  *              get_signal_stack_total_size
 590  *
 591  * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
 592  * Must be a power of two.
 593  */
 594 size_t get_signal_stack_total_size(void)
 595 {
 596     assert( sizeof(TEB) <= getpagesize() );
 597     return getpagesize();  /* this is just for the TEB, we don't need a signal stack */
 598 }
 599
 600
 601 /***********************************************************************
 602  *           set_handler
 603  *
 604  * Set a signal handler
 605  */
 606 static int set_handler( int sig, void (*func)() )
 607 {
 608     struct sigaction sig_act;
 609
 610     sig_act.sa_sigaction = func;
 611     sigemptyset( &sig_act.sa_mask );
 612     sigaddset( &sig_act.sa_mask, SIGINT );
 613     sigaddset( &sig_act.sa_mask, SIGALRM );
 614
 615     sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
 616     return sigaction( sig, &sig_act, NULL );
 617 }
 618
 619
 620 /***********************************************************************
 621  *           __wine_set_signal_handler   (NTDLL.@)
 622  */
 623 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
 624 {
 625     if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
 626     if (handlers[sig] != NULL) return -2;
 627     handlers[sig] = wsh;
 628     return 0;
 629 }
 630
 631
 632 /**********************************************************************
 633  *              SIGNAL_Init
 634  */
 635 BOOL SIGNAL_Init(void)
 636 {
 637     if (set_handler( SIGINT,  (void (*)())int_handler ) == -1) goto error;
 638     if (set_handler( SIGFPE,  (void (*)())fpe_handler ) == -1) goto error;
 639     if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
 640     if (set_handler( SIGILL,  (void (*)())segv_handler ) == -1) goto error;
 641     if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
 642     if (set_handler( SIGTERM, (void (*)())term_handler ) == -1) goto error;
 643     if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
 644 #ifdef SIGBUS
 645     if (set_handler( SIGBUS,  (void (*)())segv_handler ) == -1) goto error;
 646 #endif
 647 #ifdef SIGTRAP
 648     if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
 649 #endif
 650
 651     return TRUE;
 652
 653  error:
 654     perror("sigaction");
 655     return FALSE;
 656 }
 657
 658
 659 /**********************************************************************
 660  *              __wine_enter_vm86   (NTDLL.@)
 661  */
 662 void __wine_enter_vm86( CONTEXT *context )
 663 {
 664     MESSAGE("vm86 mode not supported on this platform\n");
 665 }
 666
 667 /**********************************************************************
 668  *              DbgBreakPoint   (NTDLL.@)
 669  */
 670 void WINAPI DbgBreakPoint(void)
 671 {
 672      kill(getpid(), SIGTRAP);
 673 }
 674
 675 /**********************************************************************
 676  *              DbgUserBreakPoint   (NTDLL.@)
 677  */
 678 void WINAPI DbgUserBreakPoint(void)
 679 {
 680      kill(getpid(), SIGTRAP);
 681 }
 682
 683 #endif  /* __powerpc__ */