From: Rainbow Warrior <sanmiguel AT earthlink DOT net>
Newsgroups: comp.lang.c,comp.os.msdos.djgpp
Subject: Re: HELP-General Protection Exception
Date: Wed, 21 Jul 1999 19:18:22 +0000
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Brian MacBride wrote:

> Rainbow Warrior wrote:
> >
> > Hello,
> >
> >         This has been stumping me for days. The program compiles OK but
> > during execution it gives me a general protection exception.  I cannot
> > see why. This program simulates pass 2 of an assembler.  The function
> > which trips it up is supposed to get tokens from a line of text read in
> > from an input file.
> >
> > Any help would be greatly appreciated
> >
> > Juan Sanmiguel
> >
>
> Consider...
>
> #define  HT_SIZE      109  /* number of entries in the hash table    */
>
> struct st_entry {
>      char    st_name[NAME_LENGTH + 1];
>      char    st_type;  /* R (Relocatable), A (Absolute),
>                           E (Exported - external definition),
>                           I (Imported - external reference),
>                           C (Control section), N (Not applicable) */
>      int     st_value;
> };
> struct  st_entry  symtbl[HT_SIZE];
>
> void init()
> { ...
>
> /* You have...
> for (counter=0; counter <= HT_SIZE; counter++)
>                 strcpy(symtbl[counter].st_name," ");
> */
>
> /* Consider... */
>
> for (counter=0; counter < HT_SIZE; counter++)
>                 strcpy(symtbl[counter].st_name," ");
>
> ...
> }
>
> With this change your program runs (correctly??) with no GPF.
>
> Regards
>
> Brian

        Did it. Still get a GPF. The fault is somewhere in the pass2 or get
tokens procedure. At least, the program worked until I added those functions.
As for running correctly, the program is in its early stages.  At this point
it should load the operation and symbol tables and read the source code and
seperate into individual tokens for processing.
        What compilier did you use?  I have tried both Borland 4.52 and Djgpp.

Again any help would be greatly appreciated.

Juan Sanmiguel