dlls/ntdll/signal_sparc.c

   1 /*
   2  * Sparc signal handling routines
   3  *
   4  * Copyright 1999 Ulrich Weigand
   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 __sparc__
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <assert.h>
  27 #include <signal.h>
  28 #include <stdlib.h>
  29 #ifdef HAVE_UNISTD_H
  30 # include <unistd.h>
  31 #endif
  32 #include <stdarg.h>
  33 #include <stdio.h>
  34 #include <sys/ucontext.h>
  35
  36 #include "windef.h"
  37 #include "winternl.h"
  38 #include "winnt.h"
  39
  40 #include "wine/exception.h"
  41 #include "ntdll_misc.h"
  42
  43 #include "wine/debug.h"
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(seh);
  46
  47 static pthread_key_t teb_key;
  48
  49 #define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, ucontext_t *__context )
  50 #define HANDLER_CONTEXT (__context)
  51
  52 typedef int (*wine_signal_handler)(unsigned int sig);
  53
  54 static wine_signal_handler handlers[256];
  55
  56 /***********************************************************************
  57  *           dispatch_signal
  58  */
  59 static inline int dispatch_signal(unsigned int sig)
  60 {
  61     if (handlers[sig] == NULL) return 0;
  62     return handlers[sig](sig);
  63 }
  64
  65
  66 /*
  67  * FIXME:  All this works only on Solaris for now
  68  */
  69
  70 /**********************************************************************
  71  *              save_context
  72  */
  73 static void save_context( CONTEXT *context, ucontext_t *ucontext )
  74 {
  75     /* Special registers */
  76     context->psr = ucontext->uc_mcontext.gregs[REG_PSR];
  77     context->pc  = ucontext->uc_mcontext.gregs[REG_PC];
  78     context->npc = ucontext->uc_mcontext.gregs[REG_nPC];
  79     context->y   = ucontext->uc_mcontext.gregs[REG_Y];
  80     context->wim = 0;  /* FIXME */
  81     context->tbr = 0;  /* FIXME */
  82
  83     /* Global registers */
  84     context->g0 = 0;  /* always */
  85     context->g1 = ucontext->uc_mcontext.gregs[REG_G1];
  86     context->g2 = ucontext->uc_mcontext.gregs[REG_G2];
  87     context->g3 = ucontext->uc_mcontext.gregs[REG_G3];
  88     context->g4 = ucontext->uc_mcontext.gregs[REG_G4];
  89     context->g5 = ucontext->uc_mcontext.gregs[REG_G5];
  90     context->g6 = ucontext->uc_mcontext.gregs[REG_G6];
  91     context->g7 = ucontext->uc_mcontext.gregs[REG_G7];
  92
  93     /* Current 'out' registers */
  94     context->o0 = ucontext->uc_mcontext.gregs[REG_O0];
  95     context->o1 = ucontext->uc_mcontext.gregs[REG_O1];
  96     context->o2 = ucontext->uc_mcontext.gregs[REG_O2];
  97     context->o3 = ucontext->uc_mcontext.gregs[REG_O3];
  98     context->o4 = ucontext->uc_mcontext.gregs[REG_O4];
  99     context->o5 = ucontext->uc_mcontext.gregs[REG_O5];
 100     context->o6 = ucontext->uc_mcontext.gregs[REG_O6];
 101     context->o7 = ucontext->uc_mcontext.gregs[REG_O7];
 102
 103     /* FIXME: what if the current register window isn't saved? */
 104     if ( ucontext->uc_mcontext.gwins && ucontext->uc_mcontext.gwins->wbcnt > 0 )
 105     {
 106         /* Current 'local' registers from first register window */
 107         context->l0 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[0];
 108         context->l1 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[1];
 109         context->l2 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[2];
 110         context->l3 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[3];
 111         context->l4 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[4];
 112         context->l5 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[5];
 113         context->l6 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[6];
 114         context->l7 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[7];
 115
 116         /* Current 'in' registers from first register window */
 117         context->i0 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[0];
 118         context->i1 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[1];
 119         context->i2 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[2];
 120         context->i3 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[3];
 121         context->i4 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[4];
 122         context->i5 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[5];
 123         context->i6 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[6];
 124         context->i7 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[7];
 125     }
 126 }
 127
 128 /**********************************************************************
 129  *              restore_context
 130  */
 131 static void restore_context( CONTEXT *context, ucontext_t *ucontext )
 132 {
 133    /* FIXME */
 134 }
 135
 136 /**********************************************************************
 137  *              save_fpu
 138  */
 139 static void save_fpu( CONTEXT *context, ucontext_t *ucontext )
 140 {
 141    /* FIXME */
 142 }
 143
 144 /**********************************************************************
 145  *              restore_fpu
 146  */
 147 static void restore_fpu( CONTEXT *context, ucontext_t *ucontext )
 148 {
 149    /* FIXME */
 150 }
 151
 152
 153 /***********************************************************************
 154  *              RtlCaptureContext (NTDLL.@)
 155  */
 156 void WINAPI RtlCaptureContext( CONTEXT *context )
 157 {
 158     FIXME("not implemented\n");
 159     memset( context, 0, sizeof(*context) );
 160 }
 161
 162
 163 /***********************************************************************
 164  *           set_cpu_context
 165  *
 166  * Set the new CPU context.
 167  */
 168 void set_cpu_context( const CONTEXT *context )
 169 {
 170     FIXME("not implemented\n");
 171 }
 172
 173
 174 /**********************************************************************
 175  *              segv_handler
 176  *
 177  * Handler for SIGSEGV.
 178  */
 179 static void segv_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 180 {
 181     EXCEPTION_RECORD rec;
 182     CONTEXT context;
 183
 184     rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
 185
 186     /* we want the page-fault case to be fast */
 187     if ( info->si_code == SEGV_ACCERR )
 188         if (!(rec.ExceptionCode = virtual_handle_fault( info->si_addr, 0 ))) return;
 189
 190     save_context( &context, ucontext );
 191     rec.ExceptionRecord  = NULL;
 192     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 193     rec.ExceptionAddress = (LPVOID)context.pc;
 194     rec.NumberParameters = 2;
 195     rec.ExceptionInformation[0] = 0;  /* FIXME: read/write access ? */
 196     rec.ExceptionInformation[1] = (ULONG_PTR)info->si_addr;
 197
 198     __regs_RtlRaiseException( &rec, &context );
 199     restore_context( &context, ucontext );
 200 }
 201
 202 /**********************************************************************
 203  *              bus_handler
 204  *
 205  * Handler for SIGBUS.
 206  */
 207 static void bus_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 208 {
 209     EXCEPTION_RECORD rec;
 210     CONTEXT context;
 211
 212     save_context( &context, ucontext );
 213     rec.ExceptionRecord  = NULL;
 214     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 215     rec.ExceptionAddress = (LPVOID)context.pc;
 216     rec.NumberParameters = 0;
 217
 218     if ( info->si_code == BUS_ADRALN )
 219         rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
 220     else
 221         rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
 222
 223     __regs_RtlRaiseException( &rec, &context );
 224     restore_context( &context, ucontext );
 225 }
 226
 227 /**********************************************************************
 228  *              ill_handler
 229  *
 230  * Handler for SIGILL.
 231  */
 232 static void ill_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 233 {
 234     EXCEPTION_RECORD rec;
 235     CONTEXT context;
 236
 237     switch ( info->si_code )
 238     {
 239     default:
 240     case ILL_ILLOPC:
 241     case ILL_ILLOPN:
 242     case ILL_ILLADR:
 243     case ILL_ILLTRP:
 244         rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
 245         break;
 246
 247     case ILL_PRVOPC:
 248     case ILL_PRVREG:
 249         rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
 250         break;
 251
 252     case ILL_BADSTK:
 253         rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
 254         break;
 255     }
 256
 257     save_context( &context, ucontext );
 258     rec.ExceptionRecord  = NULL;
 259     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 260     rec.ExceptionAddress = (LPVOID)context.pc;
 261     rec.NumberParameters = 0;
 262     __regs_RtlRaiseException( &rec, &context );
 263     restore_context( &context, ucontext );
 264 }
 265
 266
 267 /**********************************************************************
 268  *              trap_handler
 269  *
 270  * Handler for SIGTRAP.
 271  */
 272 static void trap_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 273 {
 274     EXCEPTION_RECORD rec;
 275     CONTEXT context;
 276
 277     switch ( info->si_code )
 278     {
 279     case TRAP_TRACE:
 280         rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
 281         break;
 282     case TRAP_BRKPT:
 283     default:
 284         rec.ExceptionCode = EXCEPTION_BREAKPOINT;
 285         break;
 286     }
 287
 288     save_context( &context, ucontext );
 289     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 290     rec.ExceptionRecord  = NULL;
 291     rec.ExceptionAddress = (LPVOID)context.pc;
 292     rec.NumberParameters = 0;
 293     __regs_RtlRaiseException( &rec, &context );
 294     restore_context( &context, ucontext );
 295 }
 296
 297
 298 /**********************************************************************
 299  *              fpe_handler
 300  *
 301  * Handler for SIGFPE.
 302  */
 303 static void fpe_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 304 {
 305     EXCEPTION_RECORD rec;
 306     CONTEXT context;
 307
 308     switch ( info->si_code )
 309     {
 310     case FPE_FLTSUB:
 311         rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
 312         break;
 313     case FPE_INTDIV:
 314         rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
 315         break;
 316     case FPE_INTOVF:
 317         rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
 318         break;
 319     case FPE_FLTDIV:
 320         rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
 321         break;
 322     case FPE_FLTOVF:
 323         rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
 324         break;
 325     case FPE_FLTUND:
 326         rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
 327         break;
 328     case FPE_FLTRES:
 329         rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
 330         break;
 331     case FPE_FLTINV:
 332     default:
 333         rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
 334         break;
 335     }
 336
 337     save_context( &context, ucontext );
 338     save_fpu( &context, ucontext );
 339     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 340     rec.ExceptionRecord  = NULL;
 341     rec.ExceptionAddress = (LPVOID)context.pc;
 342     rec.NumberParameters = 0;
 343     __regs_RtlRaiseException( &rec, &context );
 344     restore_context( &context, ucontext );
 345     restore_fpu( &context, ucontext );
 346 }
 347
 348
 349 /**********************************************************************
 350  *              int_handler
 351  *
 352  * Handler for SIGINT.
 353  */
 354 static void int_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 355 {
 356     if (!dispatch_signal(SIGINT))
 357     {
 358         EXCEPTION_RECORD rec;
 359         CONTEXT context;
 360
 361         save_context( &context, ucontext );
 362         rec.ExceptionCode    = CONTROL_C_EXIT;
 363         rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 364         rec.ExceptionRecord  = NULL;
 365         rec.ExceptionAddress = (LPVOID)context.pc;
 366         rec.NumberParameters = 0;
 367         __regs_RtlRaiseException( &rec, &context );
 368         restore_context( &context, ucontext );
 369     }
 370 }
 371
 372 /**********************************************************************
 373  *              abrt_handler
 374  *
 375  * Handler for SIGABRT.
 376  */
 377 static HANDLER_DEF(abrt_handler)
 378 {
 379     EXCEPTION_RECORD rec;
 380     CONTEXT context;
 381
 382     save_context( &context, HANDLER_CONTEXT );
 383     rec.ExceptionCode    = EXCEPTION_WINE_ASSERTION;
 384     rec.ExceptionFlags   = EH_NONCONTINUABLE;
 385     rec.ExceptionRecord  = NULL;
 386     rec.ExceptionAddress = (LPVOID)context.pc;
 387     rec.NumberParameters = 0;
 388     __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
 389     restore_context( &context, HANDLER_CONTEXT );
 390 }
 391
 392
 393 /**********************************************************************
 394  *              quit_handler
 395  *
 396  * Handler for SIGQUIT.
 397  */
 398 static HANDLER_DEF(quit_handler)
 399 {
 400     abort_thread(0);
 401 }
 402
 403
 404 /**********************************************************************
 405  *              usr1_handler
 406  *
 407  * Handler for SIGUSR1, used to signal a thread that it got suspended.
 408  */
 409 static HANDLER_DEF(usr1_handler)
 410 {
 411     CONTEXT context;
 412
 413     save_context( &context, HANDLER_CONTEXT );
 414     wait_suspend( &context );
 415     restore_context( &context, HANDLER_CONTEXT );
 416 }
 417
 418
 419 /**********************************************************************
 420  *              get_signal_stack_total_size
 421  *
 422  * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
 423  * Must be a power of two.
 424  */
 425 size_t get_signal_stack_total_size(void)
 426 {
 427     assert( sizeof(TEB) <= getpagesize() );
 428     return getpagesize();  /* this is just for the TEB, we don't need a signal stack */
 429 }
 430
 431
 432 /***********************************************************************
 433  *           set_handler
 434  *
 435  * Set a signal handler
 436  */
 437 static int set_handler( int sig, void (*func)() )
 438 {
 439     struct sigaction sig_act;
 440
 441     sig_act.sa_sigaction = func;
 442     sig_act.sa_mask = server_block_set;
 443     sig_act.sa_flags = SA_SIGINFO;
 444
 445     return sigaction( sig, &sig_act, NULL );
 446 }
 447
 448
 449 /***********************************************************************
 450  *           __wine_set_signal_handler   (NTDLL.@)
 451  */
 452 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
 453 {
 454     if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
 455     if (handlers[sig] != NULL) return -2;
 456     handlers[sig] = wsh;
 457     return 0;
 458 }
 459
 460
 461 /**********************************************************************
 462  *              signal_init_thread
 463  */
 464 void signal_init_thread( TEB *teb )
 465 {
 466     static int init_done;
 467
 468     if (!init_done)
 469     {
 470         pthread_key_create( &teb_key, NULL );
 471         init_done = 1;
 472     }
 473     pthread_setspecific( teb_key, teb );
 474 }
 475
 476
 477 /**********************************************************************
 478  *              signal_init_process
 479  */
 480 void signal_init_process(void)
 481 {
 482     if (set_handler( SIGINT,  (void (*)())int_handler  ) == -1) goto error;
 483     if (set_handler( SIGFPE,  (void (*)())fpe_handler  ) == -1) goto error;
 484     if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
 485     if (set_handler( SIGILL,  (void (*)())ill_handler  ) == -1) goto error;
 486     if (set_handler( SIGBUS,  (void (*)())bus_handler  ) == -1) goto error;
 487     if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
 488     if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
 489     if (set_handler( SIGQUIT, (void (*)())quit_handler ) == -1) goto error;
 490     if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
 491     /* 'ta 6' tells the kernel to synthesize any unaligned accesses this
 492        process makes, instead of just signalling an error and terminating
 493        the process.  wine-devel did not reach a conclusion on whether
 494        this is correct, because that is what x86 does, or it is harmful
 495        because it could obscure problems in user code */
 496     asm("ta 6"); /* 6 == ST_FIX_ALIGN defined in sys/trap.h */
 497     signal_init_thread();
 498     return;
 499
 500  error:
 501     perror("sigaction");
 502     exit(1);
 503 }
 504
 505
 506 /**********************************************************************
 507  *              __wine_enter_vm86
 508  */
 509 void __wine_enter_vm86( CONTEXT *context )
 510 {
 511     MESSAGE("vm86 mode not supported on this platform\n");
 512 }
 513
 514 /**********************************************************************
 515  *              DbgBreakPoint   (NTDLL.@)
 516  */
 517 void WINAPI DbgBreakPoint(void)
 518 {
 519      kill(getpid(), SIGTRAP);
 520 }
 521
 522 /**********************************************************************
 523  *              DbgUserBreakPoint   (NTDLL.@)
 524  */
 525 void WINAPI DbgUserBreakPoint(void)
 526 {
 527      kill(getpid(), SIGTRAP);
 528 }
 529
 530 /**********************************************************************
 531  *           NtCurrentTeb   (NTDLL.@)
 532  */
 533 TEB * WINAPI NtCurrentTeb(void)
 534 {
 535     return pthread_getspecific( teb_key );
 536 }
 537
 538 #endif  /* __sparc__ */