99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/*
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(c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
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See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/*
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Module: default modula-2 trap handler
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Author: Ceriel J.H. Jacobs
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Version: $Header$
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*/
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#include <em_abs.h>
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#include <m2_traps.h>
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#include <signal.h>
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static struct errm {
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int errno;
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char *errmes;
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} errors[] = {
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{ EARRAY, "array bound error"},
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{ ERANGE, "range bound error"},
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{ ESET, "set bound error"},
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{ EIOVFL, "integer overflow"},
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{ EFOVFL, "real overflow"},
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{ EFUNFL, "real underflow"},
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{ EIDIVZ, "divide by 0"},
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{ EFDIVZ, "divide by 0.0"},
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{ EIUND, "undefined integer"},
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{ EFUND, "undefined real"},
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{ ECONV, "conversion error"},
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{ ESTACK, "stack overflow"},
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{ EHEAP, "heap overflow"},
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{ EILLINS, "illegal instruction"},
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{ EODDZ, "illegal size argument"},
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{ ECASE, "case error"},
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{ EMEMFLT, "addressing non existent memory"},
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{ EBADPTR, "bad pointer used"},
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{ EBADPC, "program counter out of range"},
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{ EBADLAE, "bad argument of lae"},
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{ EBADMON, "bad monitor call"},
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{ EBADLIN, "argument if LIN too high"},
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{ EBADGTO, "GTO descriptor error"},
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{ M2_TOOLARGE, "stack size of process too large"},
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{ M2_TOOMANY, "too many nested traps + handlers"},
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{ M2_NORESULT, "no RETURN from function procedure"},
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{ M2_UOVFL, "cardinal overflow"},
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{ M2_FORCH, "(warning) FOR-loop control variable was changed in the body"},
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{ M2_UUVFL, "cardinal underflow"},
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{ M2_INTERNAL, "internal error; ask an expert for help"},
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{ M2_UNIXSIG, "got a unix signal"},
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{ -1, 0}
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};
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catch(trapno)
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int trapno;
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{
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register struct errm *ep = &errors[0];
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char *errmessage;
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char buf[20];
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register char *p, *s;
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while (ep->errno != trapno && ep->errmes != 0) ep++;
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if (p = ep->errmes) {
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while (*p) p++;
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_Traps__Message(ep->errmes, 0, (int) (p - ep->errmes), 1);
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}
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else {
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int i = trapno;
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static char q[] = "error number xxxxxxxxxxxxx";
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p = &q[13];
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s = buf;
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if (i < 0) {
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i = -i;
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*p++ = '-';
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}
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do
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*s++ = i % 10 + '0';
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while (i /= 10);
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while (s > buf) *p++ = *--s;
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*p = 0;
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_Traps__Message(q, 0, (int) (p - q), 1);
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}
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#if !defined(__em24) && !defined(__em44) && !defined(__em22)
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if (trapno == M2_UNIXSIG) {
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extern int __signo;
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signal(__signo, SIG_DFL);
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_cleanup();
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kill(getpid(), __signo);
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_exit(trapno);
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}
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#endif
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if (trapno != M2_FORCH) {
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_cleanup();
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_exit(trapno);
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}
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SIG(catch);
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}
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