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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 703 | serge | 1 | /**************************************************************************** |
| 2 | * |
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| 3 | * Open Watcom Project |
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| 4 | * |
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| 5 | * Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved. |
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| 6 | * |
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| 7 | * ======================================================================== |
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| 8 | * |
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| 9 | * This file contains Original Code and/or Modifications of Original |
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| 10 | * Code as defined in and that are subject to the Sybase Open Watcom |
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| 11 | * Public License version 1.0 (the 'License'). You may not use this file |
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| 12 | * except in compliance with the License. BY USING THIS FILE YOU AGREE TO |
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| 13 | * ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is |
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| 14 | * provided with the Original Code and Modifications, and is also |
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| 15 | * available at www.sybase.com/developer/opensource. |
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| 16 | * |
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| 17 | * The Original Code and all software distributed under the License are |
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| 18 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
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| 19 | * EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM |
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| 20 | * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF |
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| 21 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR |
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| 22 | * NON-INFRINGEMENT. Please see the License for the specific language |
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| 23 | * governing rights and limitations under the License. |
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| 24 | * |
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| 25 | * ======================================================================== |
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| 26 | * |
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| 27 | * Description: signal handling ( for DOS, Windows 3.x and ? Netware ) |
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| 28 | * |
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| 29 | ****************************************************************************/ |
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| 30 | |||
| 31 | |||
| 32 | #include "variety.h" |
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| 33 | #include |
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| 34 | #include |
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| 35 | //#include |
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| 36 | #include |
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| 37 | #include |
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| 38 | #include "rtdata.h" |
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| 39 | #include "sigtab.h" |
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| 40 | #include "sigfunc.h" |
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| 41 | #include "seterrno.h" |
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| 42 | |||
| 43 | #ifndef __WINDOWS_386__ |
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| 44 | #ifndef __NETWARE__ |
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| 45 | //extern void __grab_int23( void ); |
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| 46 | //extern void __restore_int23( void ); |
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| 47 | //extern void __grab_int_ctrl_break( void ); |
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| 48 | //extern void __restore_int_ctrl_break( void ); |
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| 49 | #endif |
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| 50 | #endif |
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| 51 | |||
| 52 | #define __SIGLAST SIGIOVFL |
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| 53 | |||
| 54 | static __sig_func SignalTable[] = { |
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| 55 | SIG_IGN, /* unused */ |
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| 56 | SIG_DFL, /* SIGABRT */ |
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| 57 | SIG_DFL, /* SIGFPE */ |
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| 58 | SIG_DFL, /* SIGILL */ |
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| 59 | SIG_DFL, /* SIGINT */ |
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| 60 | SIG_DFL, /* SIGSEGV */ |
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| 61 | SIG_DFL, /* SIGTERM */ |
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| 62 | SIG_DFL, /* SIGBREAK */ |
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| 63 | SIG_IGN, /* SIGUSR1 */ |
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| 64 | SIG_IGN, /* SIGUSR2 */ |
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| 65 | SIG_IGN, /* SIGUSR3 */ |
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| 66 | SIG_DFL, /* SIGIDIVZ */ |
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| 67 | SIG_DFL /* SIGIOVFL */ |
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| 68 | }; |
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| 69 | |||
| 70 | static FPEhandler *__old_FPE_handler = NULL; |
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| 71 | |||
| 72 | void __sigabort( void ) |
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| 73 | { |
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| 74 | raise( SIGABRT ); |
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| 75 | } |
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| 76 | |||
| 77 | //extern void _fpmath( void ); |
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| 78 | //#pragma aux _fpmath "__fpmath"; |
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| 79 | |||
| 80 | _WCRTLINK void __sigfpe_handler( int fpe_type ) |
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| 81 | { |
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| 82 | __sig_func func; |
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| 83 | |||
| 84 | func = SignalTable[ SIGFPE ]; |
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| 85 | if( func != SIG_IGN && func != SIG_DFL && func != SIG_ERR ) { |
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| 86 | SignalTable[ SIGFPE ] = SIG_DFL; /* 09-nov-87 FWC */ |
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| 87 | (*(__sigfpe_func)func)( SIGFPE, fpe_type ); /* so we can pass 2'nd parm */ |
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| 88 | } |
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| 89 | } |
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| 90 | |||
| 91 | _WCRTLINK __sig_func signal( int sig, __sig_func func ) |
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| 92 | { |
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| 93 | __sig_func prev_func; |
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| 94 | |||
| 95 | if(( sig < 1 ) || ( sig > __SIGLAST )) { |
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| 96 | __set_errno( EINVAL ); |
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| 97 | return( SIG_ERR ); |
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| 98 | } |
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| 99 | _RWD_abort = __sigabort; /* change the abort rtn address */ |
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| 100 | |||
| 101 | if( sig == SIGINT ) { |
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| 102 | if( func == SIG_DFL ) { |
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| 103 | // __restore_int23(); |
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| 104 | } else if( func != SIG_ERR ) { |
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| 105 | // __grab_int23(); |
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| 106 | } |
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| 107 | } else if( sig == SIGBREAK ) { |
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| 108 | if( func == SIG_DFL ) { |
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| 109 | // __restore_int_ctrl_break(); |
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| 110 | } else if( func != SIG_ERR ) { |
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| 111 | // __grab_int_ctrl_break(); |
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| 112 | } |
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| 113 | } else if( sig == SIGFPE ) { |
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| 114 | if( func == SIG_DFL ) { |
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| 115 | __restore_FPE_handler(); |
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| 116 | } else if( func != SIG_ERR ) { |
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| 117 | __grab_FPE_handler(); |
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| 118 | } |
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| 119 | } |
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| 120 | prev_func = _RWD_sigtab[ sig ]; |
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| 121 | _RWD_sigtab[ sig ] = func; |
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| 122 | return( prev_func ); |
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| 123 | } |
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| 124 | |||
| 125 | |||
| 126 | _WCRTLINK int raise( int sig ) |
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| 127 | { |
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| 128 | __sig_func func; |
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| 129 | |||
| 130 | func = _RWD_sigtab[ sig ]; |
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| 131 | switch( sig ) { |
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| 132 | case SIGFPE: |
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| 133 | __sigfpe_handler( FPE_EXPLICITGEN ); |
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| 134 | break; |
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| 135 | case SIGABRT: |
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| 136 | if( func == SIG_DFL ) { |
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| 137 | __terminate(); |
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| 138 | } |
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| 139 | case SIGINT: |
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| 140 | if( func != SIG_IGN && func != SIG_DFL && func != SIG_ERR ) { |
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| 141 | _RWD_sigtab[ sig ] = SIG_DFL; /* 09-nov-87 FWC */ |
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| 142 | // __restore_int23(); |
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| 143 | (*func)( sig ); |
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| 144 | } |
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| 145 | break; |
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| 146 | case SIGBREAK: |
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| 147 | if( func != SIG_IGN && func != SIG_DFL && func != SIG_ERR ) { |
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| 148 | _RWD_sigtab[ sig ] = SIG_DFL; /* 09-nov-87 FWC */ |
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| 149 | // __restore_int_ctrl_break(); |
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| 150 | (*func)( sig ); |
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| 151 | } |
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| 152 | break; |
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| 153 | case SIGILL: |
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| 154 | case SIGSEGV: |
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| 155 | case SIGTERM: |
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| 156 | case SIGUSR1: |
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| 157 | case SIGUSR2: |
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| 158 | case SIGUSR3: |
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| 159 | case SIGIDIVZ: |
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| 160 | case SIGIOVFL: |
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| 161 | if( func != SIG_IGN && func != SIG_DFL && func != SIG_ERR ) { |
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| 162 | _RWD_sigtab[ sig ] = SIG_DFL; /* 09-nov-87 FWC */ |
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| 163 | (*func)( sig ); |
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| 164 | } |
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| 165 | break; |
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| 166 | default: |
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| 167 | return( -1 ); |
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| 168 | } |
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| 169 | return( 0 ); |
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| 170 | } |
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| 171 | |||
| 172 | void __restore_FPE_handler( void ) |
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| 173 | { |
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| 174 | if( __old_FPE_handler == NULL ) { |
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| 175 | return; |
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| 176 | } |
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| 177 | __FPE_handler = __old_FPE_handler; |
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| 178 | __old_FPE_handler = NULL; |
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| 179 | } |
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| 180 | |||
| 181 | void __grab_FPE_handler( void ) |
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| 182 | { |
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| 183 | if( __old_FPE_handler == NULL ) { |
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| 184 | __old_FPE_handler = __FPE_handler; |
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| 185 | __FPE_handler = __sigfpe_handler; |
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| 186 | } |
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| 187 | } |