| 1 | ;
|
|---|
| 2 | ; SIGNAL.INC -- Signal processing
|
|---|
| 3 | ;
|
|---|
| 4 | ; Copyright (c) 1991-1998 by Eberhard Mattes
|
|---|
| 5 | ;
|
|---|
| 6 | ; This file is part of emx.
|
|---|
| 7 | ;
|
|---|
| 8 | ; emx is free software; you can redistribute it and/or modify it
|
|---|
| 9 | ; under the terms of the GNU General Public License as published by
|
|---|
| 10 | ; the Free Software Foundation; either version 2, or (at your option)
|
|---|
| 11 | ; any later version.
|
|---|
| 12 | ;
|
|---|
| 13 | ; emx is distributed in the hope that it will be useful,
|
|---|
| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 16 | ; GNU General Public License for more details.
|
|---|
| 17 | ;
|
|---|
| 18 | ; You should have received a copy of the GNU General Public License
|
|---|
| 19 | ; along with emx; see the file COPYING. If not, write to
|
|---|
| 20 | ; the Free Software Foundation, 59 Temple Place - Suite 330,
|
|---|
| 21 | ; Boston, MA 02111-1307, USA.
|
|---|
| 22 | ;
|
|---|
| 23 | ; See emx.asm for a special exception.
|
|---|
| 24 | ;
|
|---|
| 25 |
|
|---|
| 26 | ;
|
|---|
| 27 | ; Cf. /emx/include/signal.h
|
|---|
| 28 | ;
|
|---|
| 29 | SIGHUP = 1 ; Hangup
|
|---|
| 30 | SIGINT = 2 ; Interrupt (Ctrl-C)
|
|---|
| 31 | SIGQUIT = 3 ; Quit
|
|---|
| 32 | SIGILL = 4 ; Illegal instruction
|
|---|
| 33 | SIGTRAP = 5 ; Single step (debugging)
|
|---|
| 34 | SIGABRT = 6 ; abort ()
|
|---|
| 35 | SIGEMT = 7 ; ???
|
|---|
| 36 | SIGFPE = 8 ; Floating point
|
|---|
| 37 | SIGKILL = 9 ; Kill process
|
|---|
| 38 | SIGBUS = 10 ; ???
|
|---|
| 39 | SIGSEGV = 11 ; Segmentation fault
|
|---|
| 40 | SIGSYS = 12 ; Invalid argument to system call
|
|---|
| 41 | SIGPIPE = 13 ; Broken pipe
|
|---|
| 42 | SIGALRM = 14 ; Alarm
|
|---|
| 43 | SIGTERM = 15 ; Termination, process killed
|
|---|
| 44 | SIGUSR1 = 16 ; User-defined signal #1
|
|---|
| 45 | SIGUSR2 = 17 ; User-defined signal #2
|
|---|
| 46 | SIGCLD = 18 ; Death of a child process
|
|---|
| 47 | SIGBREAK = 21 ; Break (Ctrl-Break)
|
|---|
| 48 | SIGWINCH = 28 ; Window size change
|
|---|
| 49 |
|
|---|
| 50 | SIGNALS = 29 ; Signals 0..28
|
|---|
| 51 |
|
|---|
| 52 | ;
|
|---|
| 53 | ; Cf. /emx/include/signal.h
|
|---|
| 54 | ;
|
|---|
| 55 | SIG_DFL = 0 ; Default handler
|
|---|
| 56 | SIG_IGN = 1 ; Ignore signal
|
|---|
| 57 | SIG_ACK = 4 ; Acknowledges receipt of a signal
|
|---|
| 58 |
|
|---|
| 59 | SIG_ERR = -1 ; Return value of signal()
|
|---|
| 60 |
|
|---|
| 61 | SA_NOCLDSTOP = 0001H ; See POSIX.1
|
|---|
| 62 | SA_SYSV = 0002H ; Reset to SIG_DFL
|
|---|
| 63 | SA_ACK = 0004H ; Don't unblock automatically
|
|---|
| 64 | SA_TRAP = 8000H ; Signal generated by an exception
|
|---|
| 65 |
|
|---|
| 66 | SIG_BLOCK = 1
|
|---|
| 67 | SIG_UNBLOCK = 2
|
|---|
| 68 | SIG_SETMASK = 3
|
|---|
| 69 |
|
|---|
| 70 | ;
|
|---|
| 71 | ; struct sigaction
|
|---|
| 72 | ;
|
|---|
| 73 | SIGACTION STRUC
|
|---|
| 74 | SA_HANDLER DD ?
|
|---|
| 75 | SA_MASK DD ?
|
|---|
| 76 | SA_FLAGS DD ?
|
|---|
| 77 | SIGACTION ENDS
|
|---|
| 78 |
|
|---|
| 79 | ;
|
|---|
| 80 | ; Stack frame for signal handlers
|
|---|
| 81 | ;
|
|---|
| 82 | SIGFRAME STRUC
|
|---|
| 83 | SF_EIP DD ?
|
|---|
| 84 | SF_ARG DD ?
|
|---|
| 85 | SF_SIGNATURE DD ?
|
|---|
| 86 | SF_SIGNO DD ?
|
|---|
| 87 | SF_FLAGS DD ?
|
|---|
| 88 | SF_MASK DD ?
|
|---|
| 89 | SIGFRAME ENDS
|
|---|
| 90 |
|
|---|
| 91 | SIG_BLOCK_MASK = NOT (1 SHL SIGKILL)
|
|---|
| 92 |
|
|---|
| 93 | SIG_SIGNATURE = 9A003CFFH ; See PMINT.ASM & EXCEPT.ASM for details
|
|---|
| 94 | SIG_EIP = -42 ; Beyond CS limit
|
|---|
| 95 |
|
|---|
| 96 | IFNDEF __SIGNAL
|
|---|
| 97 |
|
|---|
| 98 | SV_DATA SEGMENT
|
|---|
| 99 |
|
|---|
| 100 | EXTRN CRIT_ERR_FLAG:BYTE
|
|---|
| 101 | EXTRN SIG_CORE:BYTE ; Signals which dump core
|
|---|
| 102 | EXTRN SIG_VALID:BYTE ; Valid signal numbers
|
|---|
| 103 | EXTRN EMERGENCY_TIMER:BYTE ; Timer for emergency exit
|
|---|
| 104 | EXTRN EMERGENCY_FLAG:BYTE ; Flag for emergency exit
|
|---|
| 105 |
|
|---|
| 106 | SV_DATA ENDS
|
|---|
| 107 |
|
|---|
| 108 |
|
|---|
| 109 | SV_CODE SEGMENT
|
|---|
| 110 |
|
|---|
| 111 | EXTRN SIG_DELIVER_PENDING:NEAR ; Deliver pending signals
|
|---|
| 112 | EXTRN SIG_USER_CALL:NEAR ; Invoke user signal handler
|
|---|
| 113 | EXTRN SIG_RETURN:NEAR ; Return from signal handler
|
|---|
| 114 | EXTRN SIG_MSG:NEAR ; Display "Stopped by ..."
|
|---|
| 115 | EXTRN DO_SIGNAL:NEAR ; Implement __signal()
|
|---|
| 116 | EXTRN DO_SIGACTION:NEAR ; Implement __sigaction()
|
|---|
| 117 | SV_CODE ENDS
|
|---|
| 118 |
|
|---|
| 119 |
|
|---|
| 120 | INIT_CODE SEGMENT
|
|---|
| 121 |
|
|---|
| 122 | EXTRN HOOK_INT:NEAR ; Hook interrupts
|
|---|
| 123 | EXTRN CLEANUP_SIGNAL:NEAR ; Remove interrupt hooks
|
|---|
| 124 |
|
|---|
| 125 | INIT_CODE ENDS
|
|---|
| 126 |
|
|---|
| 127 | ENDIF
|
|---|
