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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 #define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, ucontext_t *__context )
  48 #define HANDLER_CONTEXT (__context)
  49
  50 typedef int (*wine_signal_handler)(unsigned int sig);
  51
  52 static wine_signal_handler handlers[256];
  53
  54 /***********************************************************************
  55  *           dispatch_signal
  56  */
  57 inline static int dispatch_signal(unsigned int sig)
  58 {
  59     if (handlers[sig] == NULL) return 0;
  60     return handlers[sig](sig);
  61 }
  62
  63
  64 /*
  65  * FIXME:  All this works only on Solaris for now
  66  */
  67
  68 /**********************************************************************
  69  *              save_context
  70  */
  71 static void save_context( CONTEXT *context, ucontext_t *ucontext )
  72 {
  73     /* Special registers */
  74     context->psr = ucontext->uc_mcontext.gregs[REG_PSR];
  75     context->pc  = ucontext->uc_mcontext.gregs[REG_PC];
  76     context->npc = ucontext->uc_mcontext.gregs[REG_nPC];
  77     context->y   = ucontext->uc_mcontext.gregs[REG_Y];
  78     context->wim = 0;  /* FIXME */
  79     context->tbr = 0;  /* FIXME */
  80
  81     /* Global registers */
  82     context->g0 = 0;  /* always */
  83     context->g1 = ucontext->uc_mcontext.gregs[REG_G1];
  84     context->g2 = ucontext->uc_mcontext.gregs[REG_G2];
  85     context->g3 = ucontext->uc_mcontext.gregs[REG_G3];
  86     context->g4 = ucontext->uc_mcontext.gregs[REG_G4];
  87     context->g5 = ucontext->uc_mcontext.gregs[REG_G5];
  88     context->g6 = ucontext->uc_mcontext.gregs[REG_G6];
  89     context->g7 = ucontext->uc_mcontext.gregs[REG_G7];
  90
  91     /* Current 'out' registers */
  92     context->o0 = ucontext->uc_mcontext.gregs[REG_O0];
  93     context->o1 = ucontext->uc_mcontext.gregs[REG_O1];
  94     context->o2 = ucontext->uc_mcontext.gregs[REG_O2];
  95     context->o3 = ucontext->uc_mcontext.gregs[REG_O3];
  96     context->o4 = ucontext->uc_mcontext.gregs[REG_O4];
  97     context->o5 = ucontext->uc_mcontext.gregs[REG_O5];
  98     context->o6 = ucontext->uc_mcontext.gregs[REG_O6];
  99     context->o7 = ucontext->uc_mcontext.gregs[REG_O7];
 100
 101     /* FIXME: what if the current register window isn't saved? */
 102     if ( ucontext->uc_mcontext.gwins && ucontext->uc_mcontext.gwins->wbcnt > 0 )
 103     {
 104         /* Current 'local' registers from first register window */
 105         context->l0 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[0];
 106         context->l1 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[1];
 107         context->l2 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[2];
 108         context->l3 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[3];
 109         context->l4 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[4];
 110         context->l5 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[5];
 111         context->l6 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[6];
 112         context->l7 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[7];
 113
 114         /* Current 'in' registers from first register window */
 115         context->i0 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[0];
 116         context->i1 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[1];
 117         context->i2 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[2];
 118         context->i3 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[3];
 119         context->i4 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[4];
 120         context->i5 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[5];
 121         context->i6 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[6];
 122         context->i7 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[7];
 123     }
 124 }
 125
 126 /**********************************************************************
 127  *              restore_context
 128  */
 129 static void restore_context( CONTEXT *context, ucontext_t *ucontext )
 130 {
 131    /* FIXME */
 132 }
 133
 134 /**********************************************************************
 135  *              save_fpu
 136  */
 137 static void save_fpu( CONTEXT *context, ucontext_t *ucontext )
 138 {
 139    /* FIXME */
 140 }
 141
 142 /**********************************************************************
 143  *              restore_fpu
 144  */
 145 static void restore_fpu( CONTEXT *context, ucontext_t *ucontext )
 146 {
 147    /* FIXME */
 148 }
 149
 150
 151 /***********************************************************************
 152  *           set_cpu_context
 153  *
 154  * Set the new CPU context.
 155  */
 156 void set_cpu_context( const CONTEXT *context )
 157 {
 158     FIXME("not implemented\n");
 159 }
 160
 161
 162 /**********************************************************************
 163  *              segv_handler
 164  *
 165  * Handler for SIGSEGV.
 166  */
 167 static void segv_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 168 {
 169     EXCEPTION_RECORD rec;
 170     CONTEXT context;
 171
 172     /* we want the page-fault case to be fast */
 173     if ( info->si_code == SEGV_ACCERR )
 174         if (VIRTUAL_HandleFault( (LPVOID)info->si_addr )) return;
 175
 176     save_context( &context, ucontext );
 177     rec.ExceptionCode    = EXCEPTION_ACCESS_VIOLATION;
 178     rec.ExceptionRecord  = NULL;
 179     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 180     rec.ExceptionAddress = (LPVOID)context.pc;
 181     rec.NumberParameters = 2;
 182     rec.ExceptionInformation[0] = 0;  /* FIXME: read/write access ? */
 183     rec.ExceptionInformation[1] = (ULONG_PTR)info->si_addr;
 184
 185     __regs_RtlRaiseException( &rec, &context );
 186     restore_context( &context, ucontext );
 187 }
 188
 189 /**********************************************************************
 190  *              bus_handler
 191  *
 192  * Handler for SIGBUS.
 193  */
 194 static void bus_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 195 {
 196     EXCEPTION_RECORD rec;
 197     CONTEXT context;
 198
 199     save_context( &context, ucontext );
 200     rec.ExceptionRecord  = NULL;
 201     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 202     rec.ExceptionAddress = (LPVOID)context.pc;
 203     rec.NumberParameters = 0;
 204
 205     if ( info->si_code == BUS_ADRALN )
 206         rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
 207     else
 208         rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
 209
 210     __regs_RtlRaiseException( &rec, &context );
 211     restore_context( &context, ucontext );
 212 }
 213
 214 /**********************************************************************
 215  *              ill_handler
 216  *
 217  * Handler for SIGILL.
 218  */
 219 static void ill_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 220 {
 221     EXCEPTION_RECORD rec;
 222     CONTEXT context;
 223
 224     switch ( info->si_code )
 225     {
 226     default:
 227     case ILL_ILLOPC:
 228     case ILL_ILLOPN:
 229     case ILL_ILLADR:
 230     case ILL_ILLTRP:
 231         rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
 232         break;
 233
 234     case ILL_PRVOPC:
 235     case ILL_PRVREG:
 236         rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
 237         break;
 238
 239     case ILL_BADSTK:
 240         rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
 241         break;
 242     }
 243
 244     save_context( &context, ucontext );
 245     rec.ExceptionRecord  = NULL;
 246     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 247     rec.ExceptionAddress = (LPVOID)context.pc;
 248     rec.NumberParameters = 0;
 249     __regs_RtlRaiseException( &rec, &context );
 250     restore_context( &context, ucontext );
 251 }
 252
 253
 254 /**********************************************************************
 255  *              trap_handler
 256  *
 257  * Handler for SIGTRAP.
 258  */
 259 static void trap_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 260 {
 261     EXCEPTION_RECORD rec;
 262     CONTEXT context;
 263
 264     switch ( info->si_code )
 265     {
 266     case TRAP_TRACE:
 267         rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
 268         break;
 269     case TRAP_BRKPT:
 270     default:
 271         rec.ExceptionCode = EXCEPTION_BREAKPOINT;
 272         break;
 273     }
 274
 275     save_context( &context, ucontext );
 276     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 277     rec.ExceptionRecord  = NULL;
 278     rec.ExceptionAddress = (LPVOID)context.pc;
 279     rec.NumberParameters = 0;
 280     __regs_RtlRaiseException( &rec, &context );
 281     restore_context( &context, ucontext );
 282 }
 283
 284
 285 /**********************************************************************
 286  *              fpe_handler
 287  *
 288  * Handler for SIGFPE.
 289  */
 290 static void fpe_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 291 {
 292     EXCEPTION_RECORD rec;
 293     CONTEXT context;
 294
 295     switch ( info->si_code )
 296     {
 297     case FPE_FLTSUB:
 298         rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
 299         break;
 300     case FPE_INTDIV:
 301         rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
 302         break;
 303     case FPE_INTOVF:
 304         rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
 305         break;
 306     case FPE_FLTDIV:
 307         rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
 308         break;
 309     case FPE_FLTOVF:
 310         rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
 311         break;
 312     case FPE_FLTUND:
 313         rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
 314         break;
 315     case FPE_FLTRES:
 316         rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
 317         break;
 318     case FPE_FLTINV:
 319     default:
 320         rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
 321         break;
 322     }
 323
 324     save_context( &context, ucontext );
 325     save_fpu( &context, ucontext );
 326     rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 327     rec.ExceptionRecord  = NULL;
 328     rec.ExceptionAddress = (LPVOID)context.pc;
 329     rec.NumberParameters = 0;
 330     __regs_RtlRaiseException( &rec, &context );
 331     restore_context( &context, ucontext );
 332     restore_fpu( &context, ucontext );
 333 }
 334
 335
 336 /**********************************************************************
 337  *              int_handler
 338  *
 339  * Handler for SIGINT.
 340  */
 341 static void int_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
 342 {
 343     if (!dispatch_signal(SIGINT))
 344     {
 345         EXCEPTION_RECORD rec;
 346         CONTEXT context;
 347
 348         save_context( &context, ucontext );
 349         rec.ExceptionCode    = CONTROL_C_EXIT;
 350         rec.ExceptionFlags   = EXCEPTION_CONTINUABLE;
 351         rec.ExceptionRecord  = NULL;
 352         rec.ExceptionAddress = (LPVOID)context.pc;
 353         rec.NumberParameters = 0;
 354         __regs_RtlRaiseException( &rec, &context );
 355         restore_context( &context, ucontext );
 356     }
 357 }
 358
 359 /**********************************************************************
 360  *              abrt_handler
 361  *
 362  * Handler for SIGABRT.
 363  */
 364 static HANDLER_DEF(abrt_handler)
 365 {
 366     EXCEPTION_RECORD rec;
 367     CONTEXT context;
 368
 369     save_context( &context, HANDLER_CONTEXT );
 370     rec.ExceptionCode    = EXCEPTION_WINE_ASSERTION;
 371     rec.ExceptionFlags   = EH_NONCONTINUABLE;
 372     rec.ExceptionRecord  = NULL;
 373     rec.ExceptionAddress = (LPVOID)context.pc;
 374     rec.NumberParameters = 0;
 375     __regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
 376     restore_context( &context, HANDLER_CONTEXT );
 377 }
 378
 379
 380 /**********************************************************************
 381  *              term_handler
 382  *
 383  * Handler for SIGTERM.
 384  */
 385 static HANDLER_DEF(term_handler)
 386 {
 387     server_abort_thread(0);
 388 }
 389
 390
 391 /**********************************************************************
 392  *              usr1_handler
 393  *
 394  * Handler for SIGUSR1, used to signal a thread that it got suspended.
 395  */
 396 static HANDLER_DEF(usr1_handler)
 397 {
 398     CONTEXT context;
 399
 400     save_context( &context, HANDLER_CONTEXT );
 401     wait_suspend( &context );
 402     restore_context( &context, HANDLER_CONTEXT );
 403 }
 404
 405
 406 /**********************************************************************
 407  *              get_signal_stack_total_size
 408  *
 409  * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
 410  * Must be a power of two.
 411  */
 412 size_t get_signal_stack_total_size(void)
 413 {
 414     assert( sizeof(TEB) <= getpagesize() );
 415     return getpagesize();  /* this is just for the TEB, we don't need a signal stack */
 416 }
 417
 418
 419 /***********************************************************************
 420  *           set_handler
 421  *
 422  * Set a signal handler
 423  */
 424 static int set_handler( int sig, void (*func)() )
 425 {
 426     struct sigaction sig_act;
 427
 428     sig_act.sa_handler = NULL;
 429     sig_act.sa_sigaction = func;
 430     sigemptyset( &sig_act.sa_mask );
 431     sig_act.sa_flags = SA_SIGINFO;
 432
 433     return sigaction( sig, &sig_act, NULL );
 434 }
 435
 436
 437 /***********************************************************************
 438  *           __wine_set_signal_handler   (NTDLL.@)
 439  */
 440 int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
 441 {
 442     if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
 443     if (handlers[sig] != NULL) return -2;
 444     handlers[sig] = wsh;
 445     return 0;
 446 }
 447
 448
 449 /**********************************************************************
 450  *              SIGNAL_Init
 451  */
 452 BOOL SIGNAL_Init(void)
 453 {
 454     if (set_handler( SIGINT,  (void (*)())int_handler  ) == -1) goto error;
 455     if (set_handler( SIGFPE,  (void (*)())fpe_handler  ) == -1) goto error;
 456     if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
 457     if (set_handler( SIGILL,  (void (*)())ill_handler  ) == -1) goto error;
 458     if (set_handler( SIGBUS,  (void (*)())bus_handler  ) == -1) goto error;
 459     if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
 460     if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
 461     if (set_handler( SIGTERM, (void (*)())term_handler ) == -1) goto error;
 462     if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
 463     /* 'ta 6' tells the kernel to synthesize any unaligned accesses this
 464        process makes, instead of just signalling an error and terminating
 465        the process.  wine-devel did not reach a conclusion on whether
 466        this is correct, because that is what x86 does, or it is harmful
 467        because it could obscure problems in user code */
 468     asm("ta 6"); /* 6 == ST_FIX_ALIGN defined in sys/trap.h */
 469    return TRUE;
 470
 471  error:
 472     perror("sigaction");
 473     return FALSE;
 474 }
 475
 476
 477 /**********************************************************************
 478  *              __wine_enter_vm86
 479  */
 480 void __wine_enter_vm86( CONTEXT *context )
 481 {
 482     MESSAGE("vm86 mode not supported on this platform\n");
 483 }
 484
 485 /**********************************************************************
 486  *              DbgBreakPoint   (NTDLL.@)
 487  */
 488 void WINAPI DbgBreakPoint(void)
 489 {
 490      kill(getpid(), SIGTRAP);
 491 }
 492
 493 /**********************************************************************
 494  *              DbgUserBreakPoint   (NTDLL.@)
 495  */
 496 void WINAPI DbgUserBreakPoint(void)
 497 {
 498      kill(getpid(), SIGTRAP);
 499 }
 500
 501 #endif  /* __sparc__ */