gnupic: some question about the directive GLOBAL in the source code.
Subject:
Re: some question about the directive GLOBAL in the source code.
From:
Marko Kohtala ####@####.####
Date:
18 Aug 2012 09:32:49 -0000
Message-Id: <CAJ0yFawboxH4XHmwLCnggJAf_WoFu_Kr_A7y+UiJhobrwQtd=g@mail.gmail.com>
The source being parsed comes from files and macros. Need to know what is
being parsed.
Marko
2012/8/18 feqin fan ####@####.####
> (⊙o⊙)…
> Thank you.
>
> Can you tell me why so many struct file_context and struct source_context?
> struct file_context and struct source_context do what..??
>
> THX..
>
> 2012/8/18 Marko Kohtala ####@####.####
>
> > I think you are missing the read of gperror. It wont print the error on
> > first pass, and on second pass the symbol is already defined.
> >
> > Marko
> >
> > 2012/8/14 feqin fan ####@####.####
> >
> > > Hello, everybody, I'm sorry to trouble you again.
> > > I have read most of the source code of gputils. I have a query
> about
> > > the implementation of the directive GLOBAL.
> > > for example, Have this code:
> > >
> > > global var
> > >
> > > udata
> > > var res 1
> > >
> > > the assembler deal with the first line "global var",
> > > the calling sequence is like this : yyparse() - do_or_append_insn(char
> *,
> > > struct pnode *) - do_insn(char *, struct pnode *) - do_global()
> > > the function do_global() source code :
> > >
> > > 1, if (state.mode == absolute) {
> > > 2, gperror(GPE_OBJECT_ONLY, NULL);
> > > 3, } else {
> > > 4, for (; parms; parms = TAIL(parms)) {
> > > 5, p = maybe_evaluate_concat(HEAD(parms)); //p will point
> > to
> > > "var".
> > > 6, if (p) {
> > > 7, s = get_symbol(state.stTop, p); //s will be NULL
> > > 8, if (s == NULL) {
> > > 9, snprintf(buf,
> > > 10, sizeof(buf),
> > > 11 "Symbol not previously defined (%s).",
> > > 12, p);
> > > 13, gperror(GPE_NOSYM, buf);
> > >
> > >
> > >
> > > the line 4 must be first executed, in line 5 the p will point to "var".
> > and
> > > in line 7, because the source code "global var" is the first line of
> the
> > > being assembled code.
> > > So. in the function do_global() line 7, the s will be NULL,so the error
> > > will be print..
> > >
> > > Please tell what's wring in my analyses..??
> > > :-)
> > >
> > > THX, Guys..
> > >
> >
>
