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 static pthread_key_t teb_key;
  64
  65 /***********************************************************************
  66  * signal context platform-specific definitions
  67  */
  68 #ifdef linux
  69
  70 typedef struct ucontext SIGCONTEXT;
  71
  72 # define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, SIGCONTEXT *__context )
  73 # define HANDLER_CONTEXT (__context)
  74
  75 /* All Registers access - only for local access */
  76 # define REG_sig(reg_name, context)             ((context)->uc_mcontext.regs->reg_name)
  77
  78
  79 /* Gpr Registers access  */
  80 # define GPR_sig(reg_num, context)              REG_sig(gpr[reg_num], context)
  81
  82 # define IAR_sig(context)                       REG_sig(nip, context)   /* Program counter */
  83 # define MSR_sig(context)                       REG_sig(msr, context)   /* Machine State Register (Supervisor) */
  84 # define CTR_sig(context)                       REG_sig(ctr, context)   /* Count register */
  85
  86 # define XER_sig(context)                       REG_sig(xer, context) /* User's integer exception register */
  87 # define LR_sig(context)                        REG_sig(link, context) /* Link register */
  88 # define CR_sig(context)                        REG_sig(ccr, context) /* Condition register */
  89
  90 /* Float Registers access  */
  91 # define FLOAT_sig(reg_num, context)            (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
  92
  93 # define FPSCR_sig(context)                     (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
  94
  95 /* Exception Registers access */
  96 # define DAR_sig(context)                       REG_sig(dar, context)
  97 # define DSISR_sig(context)                     REG_sig(dsisr, context)
  98 # define TRAP_sig(context)                      REG_sig(trap, context)
  99
 100 #endif /* linux */
 101
 102 #ifdef __APPLE__
 103
 104 # include <sys/ucontext.h>
 105
 106 # include <sys/types.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 static inline 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 static inline 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 static inline 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  *              RtlCaptureContext (NTDLL.@)
 273  */
 274 void WINAPI RtlCaptureContext( CONTEXT *context )
 275 {
 276     FIXME("not implemented\n");
 277     memset( context, 0, sizeof(*context) );
 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  *           copy_context
 294  *
 295  * Copy a register context according to the flags.
 296  */
 297 void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
 298 {
 299     if (flags & CONTEXT_CONTROL)
 300     {
 301         to->Msr = from->Msr;
 302         to->Ctr = from->Ctr;
 303         to->Iar = from->Iar;
 304     }
 305     if (flags & CONTEXT_INTEGER)
 306     {
 307         to->Gpr0  = from->Gpr0;
 308         to->Gpr1  = from->Gpr1;
 309         to->Gpr2  = from->Gpr2;
 310         to->Gpr3  = from->Gpr3;
 311         to->Gpr4  = from->Gpr4;
 312         to->Gpr5  = from->Gpr5;
 313         to->Gpr6  = from->Gpr6;
 314         to->Gpr7  = from->Gpr7;
 315         to->Gpr8  = from->Gpr8;
 316         to->Gpr9  = from->Gpr9;
 317         to->Gpr10 = from->Gpr10;
 318         to->Gpr11 = from->Gpr11;
 319         to->Gpr12 = from->Gpr12;
 320         to->Gpr13 = from->Gpr13;
 321         to->Gpr14 = from->Gpr14;
 322         to->Gpr15 = from->Gpr15;
 323         to->Gpr16 = from->Gpr16;
 324         to->Gpr17 = from->Gpr17;
 325         to->Gpr18 = from->Gpr18;
 326         to->Gpr19 = from->Gpr19;
 327         to->Gpr20 = from->Gpr20;
 328         to->Gpr21 = from->Gpr21;
 329         to->Gpr22 = from->Gpr22;
 330         to->Gpr23 = from->Gpr23;
 331         to->Gpr24 = from->Gpr24;
 332         to->Gpr25 = from->Gpr25;
 333         to->Gpr26 = from->Gpr26;
 334         to->Gpr27 = from->Gpr27;
 335         to->Gpr28 = from->Gpr28;
 336         to->Gpr29 = from->Gpr29;
 337         to->Gpr30 = from->Gpr30;
 338         to->Gpr31 = from->Gpr31;
 339         to->Xer   = from->Xer;
 340         to->Cr    = from->Cr;
 341     }
 342     if (flags & CONTEXT_FLOATING_POINT)
 343     {
 344         to->Fpr0  = from->Fpr0;
 345         to->Fpr1  = from->Fpr1;
 346         to->Fpr2  = from->Fpr2;
 347         to->Fpr3  = from->Fpr3;
 348         to->Fpr4  = from->Fpr4;
 349         to->Fpr5  = from->Fpr5;
 350         to->Fpr6  = from->Fpr6;
 351         to->Fpr7  = from->Fpr7;
 352         to->Fpr8  = from->Fpr8;
 353         to->Fpr9  = from->Fpr9;
 354         to->Fpr10 = from->Fpr10;
 355         to->Fpr11 = from->Fpr11;
 356         to->Fpr12 = from->Fpr12;
 357         to->Fpr13 = from->Fpr13;
 358         to->Fpr14 = from->Fpr14;
 359         to->Fpr15 = from->Fpr15;
 360         to->Fpr16 = from->Fpr16;
 361         to->Fpr17 = from->Fpr17;
 362         to->Fpr18 = from->Fpr18;
 363         to->Fpr19 = from->Fpr19;
 364         to->Fpr20 = from->Fpr20;
 365         to->Fpr21 = from->Fpr21;
 366         to->Fpr22 = from->Fpr22;
 367         to->Fpr23 = from->Fpr23;
 368         to->Fpr24 = from->Fpr24;
 369         to->Fpr25 = from->Fpr25;
 370         to->Fpr26 = from->Fpr26;
 371         to->Fpr27 = from->Fpr27;
 372         to->Fpr28 = from->Fpr28;
 373         to->Fpr29 = from->Fpr29;
 374         to->Fpr30 = from->Fpr30;
 375         to->Fpr31 = from->Fpr31;
 376         to->Fpscr = from->Fpscr;
 377     }
 378 }
 379
 380
 381 /**********************************************************************
 382  *              get_fpu_code
 383  *
 384  * Get the FPU exception code from the FPU status.
 385  */
 386 static inline DWORD get_fpu_code( const CONTEXT *context )
 387 {
 388     DWORD status  = context->Fpscr;
 389
 390     if (status & 0x01)  /* IE */
 391     {
 392         if (status & 0x40)  /* SF */
 393             return EXCEPTION_FLT_STACK_CHECK;
 394         else
 395             return EXCEPTION_FLT_INVALID_OPERATION;
 396     }
 397     if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND;  /* DE flag */
 398     if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO;    /* ZE flag */
 399     if (status & 0x08) return EXCEPTION_FLT_OVERFLOW;          /* OE flag */
 400     if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW;         /* UE flag */
 401     if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT;    /* PE flag */
 402     return EXCEPTION_FLT_INVALID_OPERATION;  /* generic error */
 403 }
 404
 405 /**********************************************************************
 406  *              do_segv
 407  *
 408  * Implementation of SIGSEGV handler.
 409  */
 410 static void do_segv( CONTEXT *context, int trap, int err, int code, void * addr )
 411 {
 412     EXCEPTION_RECORD rec;
 413
 414     rec.ExceptionRecord  = NULL;
 415     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 416     rec.ExceptionAddress = addr;
 417     rec.NumberParameters = 0;
 418
 419     switch (trap) {
 420     case SIGSEGV:
 421         switch ( code & 0xffff ) {
 422         case SEGV_MAPERR:
 423         case SEGV_ACCERR:
 424                 rec.NumberParameters = 2;
 425                 rec.ExceptionInformation[0] = 0; /* FIXME ? */
 426                 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
 427                 if (!(rec.ExceptionCode = virtual_handle_fault(addr, rec.ExceptionInformation[0])))
 428                         return;
 429                 break;
 430         default:FIXME("Unhandled SIGSEGV/%x\n",code);
 431                 break;
 432         }
 433         break;
 434     case SIGBUS:
 435         switch ( code & 0xffff ) {
 436         case BUS_ADRALN:
 437                 rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
 438                 break;
 439 #ifdef BUS_ADRERR
 440         case BUS_ADRERR:
 441 #endif
 442 #ifdef BUS_OBJERR
 443         case BUS_OBJERR:
 444                 /* FIXME: correct for all cases ? */
 445                 rec.NumberParameters = 2;
 446                 rec.ExceptionInformation[0] = 0; /* FIXME ? */
 447                 rec.ExceptionInformation[1] = (ULONG_PTR)addr;
 448                 if (!(rec.ExceptionCode = virtual_handle_fault(addr, rec.ExceptionInformation[0])))
 449                         return;
 450                 break;
 451 #endif
 452         default:FIXME("Unhandled SIGBUS/%x\n",code);
 453                 break;
 454         }
 455         break;
 456     case SIGILL:
 457         switch ( code & 0xffff ) {
 458         case ILL_ILLOPC: /* illegal opcode */
 459 #ifdef ILL_ILLOPN
 460         case ILL_ILLOPN: /* illegal operand */
 461 #endif
 462 #ifdef ILL_ILLADR
 463         case ILL_ILLADR: /* illegal addressing mode */
 464 #endif
 465 #ifdef ILL_ILLTRP
 466         case ILL_ILLTRP: /* illegal trap */
 467 #endif
 468 #ifdef ILL_COPROC
 469         case ILL_COPROC: /* coprocessor error */
 470 #endif
 471                 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
 472                 break;
 473         case ILL_PRVOPC: /* privileged opcode */
 474 #ifdef ILL_PRVREG
 475         case ILL_PRVREG: /* privileged register */
 476 #endif
 477                 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
 478                 break;
 479 #ifdef ILL_BADSTK
 480         case ILL_BADSTK: /* internal stack error */
 481                 rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
 482                 break;
 483 #endif
 484         default:FIXME("Unhandled SIGILL/%x\n", code);
 485                 break;
 486         }
 487         break;
 488     }
 489     __regs_RtlRaiseException( &rec, context );
 490 }
 491
 492 /**********************************************************************
 493  *              do_trap
 494  *
 495  * Implementation of SIGTRAP handler.
 496  */
 497 static void do_trap( CONTEXT *context, int code, void * addr )
 498 {
 499     EXCEPTION_RECORD rec;
 500
 501     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 502     rec.ExceptionRecord  = NULL;
 503     rec.ExceptionAddress = addr;
 504     rec.NumberParameters = 0;
 505
 506     /* FIXME: check if we might need to modify PC */
 507     switch (code & 0xffff) {
 508 #ifdef TRAP_BRKPT
 509     case TRAP_BRKPT:
 510         rec.ExceptionCode = EXCEPTION_BREAKPOINT;
 511         break;
 512 #endif
 513 #ifdef TRAP_TRACE
 514     case TRAP_TRACE:
 515         rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
 516         break;
 517 #endif
 518     default:FIXME("Unhandled SIGTRAP/%x\n", code);
 519                 break;
 520     }
 521     __regs_RtlRaiseException( &rec, context );
 522 }
 523
 524 /**********************************************************************
 525  *              do_trap
 526  *
 527  * Implementation of SIGFPE handler.
 528  */
 529 static void do_fpe( CONTEXT *context, int code, void * addr )
 530 {
 531     EXCEPTION_RECORD rec;
 532
 533     switch ( code  & 0xffff ) {
 534 #ifdef FPE_FLTSUB
 535     case FPE_FLTSUB:
 536         rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
 537         break;
 538 #endif
 539 #ifdef FPE_INTDIV
 540     case FPE_INTDIV:
 541         rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
 542         break;
 543 #endif
 544 #ifdef FPE_INTOVF
 545     case FPE_INTOVF:
 546         rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
 547         break;
 548 #endif
 549 #ifdef FPE_FLTDIV
 550     case FPE_FLTDIV:
 551         rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
 552         break;
 553 #endif
 554 #ifdef FPE_FLTOVF
 555     case FPE_FLTOVF:
 556         rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
 557         break;
 558 #endif
 559 #ifdef FPE_FLTUND
 560     case FPE_FLTUND:
 561         rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
 562         break;
 563 #endif
 564 #ifdef FPE_FLTRES
 565     case FPE_FLTRES:
 566         rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
 567         break;
 568 #endif
 569 #ifdef FPE_FLTINV
 570     case FPE_FLTINV:
 571 #endif
 572     default:
 573         rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
 574         break;
 575     }
 576     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 577     rec.ExceptionRecord  = NULL;
 578     rec.ExceptionAddress = addr;
 579     rec.NumberParameters = 0;
 580     __regs_RtlRaiseException( &rec, context );
 581 }
 582
 583 /**********************************************************************
 584  *              segv_handler
 585  *
 586  * Handler for SIGSEGV and related errors.
 587  */
 588 static HANDLER_DEF(segv_handler)
 589 {
 590     CONTEXT context;
 591     save_context( &context, HANDLER_CONTEXT );
 592     do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
 593     restore_context( &context, HANDLER_CONTEXT );
 594 }
 595
 596 /**********************************************************************
 597  *              trap_handler
 598  *
 599  * Handler for SIGTRAP.
 600  */
 601 static HANDLER_DEF(trap_handler)
 602 {
 603     CONTEXT context;
 604     save_context( &context, HANDLER_CONTEXT );
 605     do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
 606     restore_context( &context, HANDLER_CONTEXT );
 607 }
 608
 609 /**********************************************************************
 610  *              fpe_handler
 611  *
 612  * Handler for SIGFPE.
 613  */
 614 static HANDLER_DEF(fpe_handler)
 615 {
 616     CONTEXT context;
 617     save_fpu( &context, HANDLER_CONTEXT );
 618     save_context( &context, HANDLER_CONTEXT );
 619     do_fpe( &context,  __siginfo->si_code, __siginfo->si_addr );
 620     restore_context( &context, HANDLER_CONTEXT );
 621     restore_fpu( &context, HANDLER_CONTEXT );
 622 }
 623
 624 /**********************************************************************
 625  *              int_handler
 626  *
 627  * Handler for SIGINT.
 628  */
 629 static HANDLER_DEF(int_handler)
 630 {
 631     if (!dispatch_signal(SIGINT))
 632     {
 633         EXCEPTION_RECORD rec;
 634         CONTEXT context;
 635
 636         save_context( &context, HANDLER_CONTEXT );
 637         rec.ExceptionCode    = CONTROL_C_EXIT;
 638         rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 639         rec.ExceptionRecord  = NULL;
 640         rec.ExceptionAddress = (LPVOID)context.Iar;
 641         rec.NumberParameters = 0;
 642         __regs_RtlRaiseException( &rec, &context );
 643         restore_context( &context, HANDLER_CONTEXT );
 644     }
 645 }
 646
 647
 648 /**********************************************************************
 649  *              abrt_handler
 650  *
 651  * Handler for SIGABRT.
 652  */
 653 static HANDLER_DEF(abrt_handler)
 654 {
 655     EXCEPTION_RECORD rec;
 656     CONTEXT context;
 657
 658     save_context( &context, HANDLER_CONTEXT );
 659     rec.ExceptionCode    = EXCEPTION_WINE_ASSERTION;
 660     rec.ExceptionFlags   = EH_NONCONTINUABLE;
 661     rec.ExceptionRecord  = NULL;
 662     rec.ExceptionAddress = (LPVOID)context.Iar;
 663     rec.NumberParameters = 0;
 664     __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
 665     restore_context( &context, HANDLER_CONTEXT );
 666 }
 667
 668
 669 /**********************************************************************
 670  *              quit_handler
 671  *
 672  * Handler for SIGQUIT.
 673  */
 674 static HANDLER_DEF(quit_handler)
 675 {
 676     abort_thread(0);
 677 }
 678
 679
 680 /**********************************************************************
 681  *              usr1_handler
 682  *
 683  * Handler for SIGUSR1, used to signal a thread that it got suspended.
 684  */
 685 static HANDLER_DEF(usr1_handler)
 686 {
 687     CONTEXT context;
 688
 689     save_context( &context, HANDLER_CONTEXT );
 690     wait_suspend( &context );
 691     restore_context( &context, HANDLER_CONTEXT );
 692 }
 693
 694
 695 /**********************************************************************
 696  *              get_signal_stack_total_size
 697  *
 698  * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
 699  * Must be a power of two.
 700  */
 701 size_t get_signal_stack_total_size(void)
 702 {
 703     assert( sizeof(TEB) <= getpagesize() );
 704     return getpagesize();  /* this is just for the TEB, we don't need a signal stack */
 705 }
 706
 707
 708 /***********************************************************************
 709  *           set_handler
 710  *
 711  * Set a signal handler
 712  */
 713 static int set_handler( int sig, void (*func)() )
 714 {
 715     struct sigaction sig_act;
 716
 717     sig_act.sa_sigaction = func;
 718     sig_act.sa_mask = server_block_set;
 719     sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
 720     return sigaction( sig, &sig_act, NULL );
 721 }
 722
 723
 724 /***********************************************************************
 725  *           __wine_set_signal_handler   (NTDLL.@)
 726  */
 727 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
 728 {
 729     if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
 730     if (handlers[sig] != NULL) return -2;
 731     handlers[sig] = wsh;
 732     return 0;
 733 }
 734
 735
 736 /**********************************************************************
 737  *              signal_init_thread
 738  */
 739 void signal_init_thread( TEB *teb )
 740 {
 741     static int init_done;
 742
 743     if (!init_done)
 744     {
 745         pthread_key_create( &teb_key, NULL );
 746         init_done = 1;
 747     }
 748     pthread_setspecific( teb_key, teb );
 749 }
 750
 751
 752 /**********************************************************************
 753  *              signal_init_process
 754  */
 755 void signal_init_process(void)
 756 {
 757     if (set_handler( SIGINT,  (void (*)())int_handler ) == -1) goto error;
 758     if (set_handler( SIGFPE,  (void (*)())fpe_handler ) == -1) goto error;
 759     if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
 760     if (set_handler( SIGILL,  (void (*)())segv_handler ) == -1) goto error;
 761     if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
 762     if (set_handler( SIGQUIT, (void (*)())quit_handler ) == -1) goto error;
 763     if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
 764 #ifdef SIGBUS
 765     if (set_handler( SIGBUS,  (void (*)())segv_handler ) == -1) goto error;
 766 #endif
 767 #ifdef SIGTRAP
 768     if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
 769 #endif
 770     return;
 771
 772  error:
 773     perror("sigaction");
 774     exit(1);
 775 }
 776
 777
 778 /**********************************************************************
 779  *              __wine_enter_vm86   (NTDLL.@)
 780  */
 781 void __wine_enter_vm86( CONTEXT *context )
 782 {
 783     MESSAGE("vm86 mode not supported on this platform\n");
 784 }
 785
 786 /**********************************************************************
 787  *              DbgBreakPoint   (NTDLL.@)
 788  */
 789 void WINAPI DbgBreakPoint(void)
 790 {
 791      kill(getpid(), SIGTRAP);
 792 }
 793
 794 /**********************************************************************
 795  *              DbgUserBreakPoint   (NTDLL.@)
 796  */
 797 void WINAPI DbgUserBreakPoint(void)
 798 {
 799      kill(getpid(), SIGTRAP);
 800 }
 801
 802 /**********************************************************************
 803  *           NtCurrentTeb   (NTDLL.@)
 804  */
 805 TEB * WINAPI NtCurrentTeb(void)
 806 {
 807     return pthread_getspecific( teb_key );
 808 }
 809
 810 #endif  /* __powerpc__ */