459 lines
13 KiB
C
459 lines
13 KiB
C
/*
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* Sparc signal handling routines
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*
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* Copyright 1999 Ulrich Weigand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef __sparc__
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#include "config.h"
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#include <signal.h>
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#include <stdlib.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <stdio.h>
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#include <sys/ucontext.h>
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#include "winternl.h"
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#include "winbase.h"
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#include "winnt.h"
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#include "wine/exception.h"
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#include "global.h"
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#include "stackframe.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(seh);
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typedef int (*wine_signal_handler)(unsigned int sig);
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static wine_signal_handler handlers[256];
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static sigset_t all_sigs;
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/***********************************************************************
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* dispatch_signal
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*/
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inline static int dispatch_signal(unsigned int sig)
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{
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if (handlers[sig] == NULL) return 0;
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return handlers[sig](sig);
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}
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/*
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* FIXME: All this works only on Solaris for now
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*/
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/**********************************************************************
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* save_context
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*/
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static void save_context( CONTEXT *context, ucontext_t *ucontext )
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{
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/* Special registers */
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context->psr = ucontext->uc_mcontext.gregs[REG_PSR];
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context->pc = ucontext->uc_mcontext.gregs[REG_PC];
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context->npc = ucontext->uc_mcontext.gregs[REG_nPC];
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context->y = ucontext->uc_mcontext.gregs[REG_Y];
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context->wim = 0; /* FIXME */
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context->tbr = 0; /* FIXME */
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/* Global registers */
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context->g0 = 0; /* always */
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context->g1 = ucontext->uc_mcontext.gregs[REG_G1];
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context->g2 = ucontext->uc_mcontext.gregs[REG_G2];
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context->g3 = ucontext->uc_mcontext.gregs[REG_G3];
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context->g4 = ucontext->uc_mcontext.gregs[REG_G4];
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context->g5 = ucontext->uc_mcontext.gregs[REG_G5];
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context->g6 = ucontext->uc_mcontext.gregs[REG_G6];
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context->g7 = ucontext->uc_mcontext.gregs[REG_G7];
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/* Current 'out' registers */
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context->o0 = ucontext->uc_mcontext.gregs[REG_O0];
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context->o1 = ucontext->uc_mcontext.gregs[REG_O1];
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context->o2 = ucontext->uc_mcontext.gregs[REG_O2];
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context->o3 = ucontext->uc_mcontext.gregs[REG_O3];
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context->o4 = ucontext->uc_mcontext.gregs[REG_O4];
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context->o5 = ucontext->uc_mcontext.gregs[REG_O5];
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context->o6 = ucontext->uc_mcontext.gregs[REG_O6];
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context->o7 = ucontext->uc_mcontext.gregs[REG_O7];
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/* FIXME: what if the current register window isn't saved? */
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if ( ucontext->uc_mcontext.gwins && ucontext->uc_mcontext.gwins->wbcnt > 0 )
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{
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/* Current 'local' registers from first register window */
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context->l0 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[0];
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context->l1 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[1];
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context->l2 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[2];
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context->l3 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[3];
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context->l4 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[4];
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context->l5 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[5];
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context->l6 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[6];
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context->l7 = ucontext->uc_mcontext.gwins->wbuf[0].rw_local[7];
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/* Current 'in' registers from first register window */
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context->i0 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[0];
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context->i1 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[1];
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context->i2 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[2];
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context->i3 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[3];
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context->i4 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[4];
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context->i5 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[5];
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context->i6 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[6];
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context->i7 = ucontext->uc_mcontext.gwins->wbuf[0].rw_in[7];
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}
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}
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/**********************************************************************
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* restore_context
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*/
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static void restore_context( CONTEXT *context, ucontext_t *ucontext )
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{
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/* FIXME */
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}
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/**********************************************************************
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* save_fpu
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*/
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static void save_fpu( CONTEXT *context, ucontext_t *ucontext )
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{
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/* FIXME */
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}
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/**********************************************************************
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* restore_fpu
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*/
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static void restore_fpu( CONTEXT *context, ucontext_t *ucontext )
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{
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/* FIXME */
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}
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/**********************************************************************
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* segv_handler
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*
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* Handler for SIGSEGV.
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*/
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static void segv_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
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{
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EXCEPTION_RECORD rec;
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CONTEXT context;
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/* we want the page-fault case to be fast */
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if ( info->si_code == SEGV_ACCERR )
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if (VIRTUAL_HandleFault( (LPVOID)info->si_addr )) return;
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save_context( &context, ucontext );
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rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
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rec.ExceptionRecord = NULL;
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionAddress = (LPVOID)context.pc;
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rec.NumberParameters = 2;
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rec.ExceptionInformation[0] = 0; /* FIXME: read/write access ? */
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rec.ExceptionInformation[1] = (DWORD)info->si_addr;
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EXC_RtlRaiseException( &rec, &context );
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restore_context( &context, ucontext );
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}
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/**********************************************************************
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* bus_handler
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*
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* Handler for SIGBUS.
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*/
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static void bus_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
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{
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EXCEPTION_RECORD rec;
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CONTEXT context;
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save_context( &context, ucontext );
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rec.ExceptionRecord = NULL;
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionAddress = (LPVOID)context.pc;
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rec.NumberParameters = 0;
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if ( info->si_code == BUS_ADRALN )
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rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
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else
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rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
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EXC_RtlRaiseException( &rec, &context );
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restore_context( &context, ucontext );
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}
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/**********************************************************************
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* ill_handler
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*
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* Handler for SIGILL.
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*/
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static void ill_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
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{
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EXCEPTION_RECORD rec;
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CONTEXT context;
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switch ( info->si_code )
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{
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default:
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case ILL_ILLOPC:
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case ILL_ILLOPN:
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case ILL_ILLADR:
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case ILL_ILLTRP:
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rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
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break;
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case ILL_PRVOPC:
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case ILL_PRVREG:
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rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
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break;
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case ILL_BADSTK:
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rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
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break;
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}
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save_context( &context, ucontext );
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rec.ExceptionRecord = NULL;
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionAddress = (LPVOID)context.pc;
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rec.NumberParameters = 0;
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EXC_RtlRaiseException( &rec, &context );
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restore_context( &context, ucontext );
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}
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/**********************************************************************
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* trap_handler
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*
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* Handler for SIGTRAP.
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*/
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static void trap_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
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{
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EXCEPTION_RECORD rec;
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CONTEXT context;
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switch ( info->si_code )
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{
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case TRAP_TRACE:
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rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
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break;
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case TRAP_BRKPT:
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default:
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rec.ExceptionCode = EXCEPTION_BREAKPOINT;
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break;
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}
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save_context( &context, ucontext );
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionRecord = NULL;
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rec.ExceptionAddress = (LPVOID)context.pc;
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rec.NumberParameters = 0;
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EXC_RtlRaiseException( &rec, &context );
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restore_context( &context, ucontext );
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}
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/**********************************************************************
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* fpe_handler
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*
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* Handler for SIGFPE.
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*/
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static void fpe_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
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{
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EXCEPTION_RECORD rec;
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CONTEXT context;
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switch ( info->si_code )
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{
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case FPE_FLTSUB:
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rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
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break;
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case FPE_INTDIV:
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rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
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break;
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case FPE_INTOVF:
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rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
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break;
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case FPE_FLTDIV:
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rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
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break;
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case FPE_FLTOVF:
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rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
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break;
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case FPE_FLTUND:
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rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
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break;
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case FPE_FLTRES:
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rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
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break;
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case FPE_FLTINV:
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default:
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rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
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break;
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}
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save_context( &context, ucontext );
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save_fpu( &context, ucontext );
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionRecord = NULL;
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rec.ExceptionAddress = (LPVOID)context.pc;
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rec.NumberParameters = 0;
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EXC_RtlRaiseException( &rec, &context );
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restore_context( &context, ucontext );
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restore_fpu( &context, ucontext );
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}
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/**********************************************************************
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* int_handler
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*
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* Handler for SIGINT.
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*/
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static void int_handler( int signal, siginfo_t *info, ucontext_t *ucontext )
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{
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if (!dispatch_signal(SIGINT))
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{
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EXCEPTION_RECORD rec;
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CONTEXT context;
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save_context( &context, ucontext );
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rec.ExceptionCode = CONTROL_C_EXIT;
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionRecord = NULL;
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rec.ExceptionAddress = (LPVOID)context.pc;
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rec.NumberParameters = 0;
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EXC_RtlRaiseException( &rec, &context );
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restore_context( &context, ucontext );
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}
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}
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/***********************************************************************
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* set_handler
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*
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* Set a signal handler
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*/
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static int set_handler( int sig, void (*func)() )
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{
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struct sigaction sig_act;
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sig_act.sa_handler = NULL;
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sig_act.sa_sigaction = func;
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sigemptyset( &sig_act.sa_mask );
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sig_act.sa_flags = SA_SIGINFO;
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return sigaction( sig, &sig_act, NULL );
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}
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/***********************************************************************
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* __wine_set_signal_handler (NTDLL.@)
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*/
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int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
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{
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if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
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if (handlers[sig] != NULL) return -2;
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handlers[sig] = wsh;
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return 0;
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}
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/***********************************************************************
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* SIGNAL_Unblock
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*
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* Unblock signals. Called from EXC_RtlRaiseException.
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*/
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void SIGNAL_Unblock( void )
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{
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sigprocmask( SIG_UNBLOCK, &all_sigs, NULL );
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}
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/**********************************************************************
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* SIGNAL_Init
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*/
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BOOL SIGNAL_Init(void)
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{
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sigfillset( &all_sigs );
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if (set_handler( SIGINT, (void (*)())int_handler ) == -1) goto error;
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if (set_handler( SIGFPE, (void (*)())fpe_handler ) == -1) goto error;
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if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
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if (set_handler( SIGILL, (void (*)())ill_handler ) == -1) goto error;
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if (set_handler( SIGBUS, (void (*)())bus_handler ) == -1) goto error;
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if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
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return TRUE;
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error:
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perror("sigaction");
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return FALSE;
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}
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/**********************************************************************
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* SIGNAL_Reset
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*/
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void SIGNAL_Reset(void)
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{
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sigset_t block_set;
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/* block the async signals */
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sigemptyset( &block_set );
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sigaddset( &block_set, SIGALRM );
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sigaddset( &block_set, SIGIO );
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sigaddset( &block_set, SIGHUP );
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sigaddset( &block_set, SIGUSR2 );
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sigprocmask( SIG_BLOCK, &block_set, NULL );
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/* restore default handlers */
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signal( SIGINT, SIG_DFL );
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signal( SIGFPE, SIG_DFL );
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signal( SIGSEGV, SIG_DFL );
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signal( SIGILL, SIG_DFL );
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signal( SIGBUS, SIG_DFL );
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signal( SIGTRAP, SIG_DFL );
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}
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/**********************************************************************
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* __wine_enter_vm86
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*/
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void __wine_enter_vm86( CONTEXT *context )
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{
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MESSAGE("vm86 mode not supported on this platform\n");
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}
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/**********************************************************************
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* DbgBreakPoint (NTDLL.@)
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*/
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void WINAPI DbgBreakPoint(void)
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{
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kill(getpid(), SIGTRAP);
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}
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/**********************************************************************
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* DbgUserBreakPoint (NTDLL.@)
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*/
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void WINAPI DbgUserBreakPoint(void)
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{
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kill(getpid(), SIGTRAP);
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}
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#endif /* __sparc__ */
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