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| /**************************************************************************** |
| * |
| * Open Watcom Project |
| * |
| * Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved. |
| * |
| * ======================================================================== |
| * |
| * This file contains Original Code and/or Modifications of Original |
| * Code as defined in and that are subject to the Sybase Open Watcom |
| * Public License version 1.0 (the 'License'). You may not use this file |
| * except in compliance with the License. BY USING THIS FILE YOU AGREE TO |
| * ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is |
| * provided with the Original Code and Modifications, and is also |
| * available at www.sybase.com/developer/opensource. |
| * |
| * The Original Code and all software distributed under the License are |
| * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| * EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM |
| * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR |
| * NON-INFRINGEMENT. Please see the License for the specific language |
| * governing rights and limitations under the License. |
| * |
| * ======================================================================== |
| * |
| * Description: signal handling ( for DOS, Windows 3.x and ? Netware ) |
| * |
| ****************************************************************************/ |
| |
| |
| #include "variety.h" |
| #include <stdio.h> |
| #include <signal.h> |
| //#include <dos.h> |
| #include <errno.h> |
| #include <float.h> |
| #include "rtdata.h" |
| #include "sigtab.h" |
| #include "sigfunc.h" |
| #include "seterrno.h" |
| |
| #ifndef __WINDOWS_386__ |
| #ifndef __NETWARE__ |
| //extern void __grab_int23( void ); |
| //extern void __restore_int23( void ); |
| //extern void __grab_int_ctrl_break( void ); |
| //extern void __restore_int_ctrl_break( void ); |
| #endif |
| #endif |
| |
| #define __SIGLAST SIGIOVFL |
| |
| static __sig_func SignalTable[] = { |
| SIG_IGN, /* unused */ |
| SIG_DFL, /* SIGABRT */ |
| SIG_DFL, /* SIGFPE */ |
| SIG_DFL, /* SIGILL */ |
| SIG_DFL, /* SIGINT */ |
| SIG_DFL, /* SIGSEGV */ |
| SIG_DFL, /* SIGTERM */ |
| SIG_DFL, /* SIGBREAK */ |
| SIG_IGN, /* SIGUSR1 */ |
| SIG_IGN, /* SIGUSR2 */ |
| SIG_IGN, /* SIGUSR3 */ |
| SIG_DFL, /* SIGIDIVZ */ |
| SIG_DFL /* SIGIOVFL */ |
| }; |
| |
| static FPEhandler *__old_FPE_handler = NULL; |
| |
| void __sigabort( void ) |
| { |
| raise( SIGABRT ); |
| } |
| |
| //extern void _fpmath( void ); |
| //#pragma aux _fpmath "__fpmath"; |
| |
| _WCRTLINK void __sigfpe_handler( int fpe_type ) |
| { |
| __sig_func func; |
| |
| func = SignalTable[ SIGFPE ]; |
| if( func != SIG_IGN && func != SIG_DFL && func != SIG_ERR ) { |
| SignalTable[ SIGFPE ] = SIG_DFL; /* 09-nov-87 FWC */ |
| (*(__sigfpe_func)func)( SIGFPE, fpe_type ); /* so we can pass 2'nd parm */ |
| } |
| } |
| |
| _WCRTLINK __sig_func signal( int sig, __sig_func func ) |
| { |
| __sig_func prev_func; |
| |
| if(( sig < 1 ) || ( sig > __SIGLAST )) { |
| __set_errno( EINVAL ); |
| return( SIG_ERR ); |
| } |
| _RWD_abort = __sigabort; /* change the abort rtn address */ |
| |
| if( sig == SIGINT ) { |
| if( func == SIG_DFL ) { |
| // __restore_int23(); |
| } else if( func != SIG_ERR ) { |
| // __grab_int23(); |
| } |
| } else if( sig == SIGBREAK ) { |
| if( func == SIG_DFL ) { |
| // __restore_int_ctrl_break(); |
| } else if( func != SIG_ERR ) { |
| // __grab_int_ctrl_break(); |
| } |
| } else if( sig == SIGFPE ) { |
| if( func == SIG_DFL ) { |
| __restore_FPE_handler(); |
| } else if( func != SIG_ERR ) { |
| __grab_FPE_handler(); |
| } |
| } |
| prev_func = _RWD_sigtab[ sig ]; |
| _RWD_sigtab[ sig ] = func; |
| return( prev_func ); |
| } |
| |
| |
| _WCRTLINK int raise( int sig ) |
| { |
| __sig_func func; |
| |
| func = _RWD_sigtab[ sig ]; |
| switch( sig ) { |
| case SIGFPE: |
| __sigfpe_handler( FPE_EXPLICITGEN ); |
| break; |
| case SIGABRT: |
| if( func == SIG_DFL ) { |
| __terminate(); |
| } |
| case SIGINT: |
| if( func != SIG_IGN && func != SIG_DFL && func != SIG_ERR ) { |
| _RWD_sigtab[ sig ] = SIG_DFL; /* 09-nov-87 FWC */ |
| // __restore_int23(); |
| (*func)( sig ); |
| } |
| break; |
| case SIGBREAK: |
| if( func != SIG_IGN && func != SIG_DFL && func != SIG_ERR ) { |
| _RWD_sigtab[ sig ] = SIG_DFL; /* 09-nov-87 FWC */ |
| // __restore_int_ctrl_break(); |
| (*func)( sig ); |
| } |
| break; |
| case SIGILL: |
| case SIGSEGV: |
| case SIGTERM: |
| case SIGUSR1: |
| case SIGUSR2: |
| case SIGUSR3: |
| case SIGIDIVZ: |
| case SIGIOVFL: |
| if( func != SIG_IGN && func != SIG_DFL && func != SIG_ERR ) { |
| _RWD_sigtab[ sig ] = SIG_DFL; /* 09-nov-87 FWC */ |
| (*func)( sig ); |
| } |
| break; |
| default: |
| return( -1 ); |
| } |
| return( 0 ); |
| } |
| |
| void __restore_FPE_handler( void ) |
| { |
| if( __old_FPE_handler == NULL ) { |
| return; |
| } |
| __FPE_handler = __old_FPE_handler; |
| __old_FPE_handler = NULL; |
| } |
| |
| void __grab_FPE_handler( void ) |
| { |
| if( __old_FPE_handler == NULL ) { |
| __old_FPE_handler = __FPE_handler; |
| __FPE_handler = __sigfpe_handler; |
| } |
| } |