106 lines
2.8 KiB
C
106 lines
2.8 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: $Id$
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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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#include "libm2.h"
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static struct errm
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{
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int errno;
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char* errmes;
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} errors[] = { { 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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void catch (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)
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ep++;
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if (p = ep->errmes)
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{
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while (*p)
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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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{
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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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{
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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)
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*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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{
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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 + 1);
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}
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#endif
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if (trapno != M2_FORCH)
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{
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_cleanup();
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_exit(trapno + 1);
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}
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SIG(catch);
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}
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