From mboxrd@z Thu Jan  1 00:00:00 1970
From: "H . J . Lu" <hjl@lucon.org>
To: Andrew Cagney <ac131313@cygnus.com>, "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>, Richard Henderson <rth@redhat.com>, David B Anderson <davea@quasar.engr.sgi.com>, gdb@sourceware.cygnus.com, binutils@sourceware.cygnus.com
Subject: Re: Why does mips define elf_backend_sign_extend_vma to true?
Date: Wed, 08 Aug 2001 10:02:00 -0000
Message-id: <20010808100228.A29503@lucon.org>
References: <20010807232102.A19636@lucon.org> <Pine.GSO.3.96.1010808100426.21622B-100000@delta.ds2.pg.gda.pl> <20010808072922.C26704@lucon.org> <3B7151C1.4030203@cygnus.com> <20010808080306.C26983@lucon.org> <3B71582D.4050003@cygnus.com> <20010808090249.A28467@lucon.org> <20010808095401.B23955@nevyn.them.org>
X-SW-Source: 2001-08/msg00074.html

On Wed, Aug 08, 2001 at 09:54:01AM -0700, Daniel Jacobowitz wrote:
> On Wed, Aug 08, 2001 at 09:02:49AM -0700, H . J . Lu wrote:
> > 
> > I am willing to buy it. The immediate problem is in
> > 
> > struct obj_section *
> > find_pc_sect_section (CORE_ADDR pc, struct sec *section)
> > {
> >   struct obj_section *s;
> >   struct objfile *objfile;
> > 
> >   ALL_OBJSECTIONS (objfile, s)
> >     if ((section == 0 || section == s->the_bfd_section) &&
> >         s->addr <= pc && pc < s->endaddr)
> >       return (s);
> > 
> >   return (NULL);
> > }
> > 
> > s->addr and s->endaddr came from BFD with sign extension. But `pc' is
> > not, which has the bit 31 set. All of them have the type of CORE_ADDR.
> > Any suggestions? I am not sure if it is the only problem in gdb.
> 
> PC should be already be sign extended at this point... in my tests, it
> is.

The gdb I checked out from the 5.1 branch yesterday doesn't do it. BTW,
what

(gdb) print printk

# gdb yourgdb
.....
(top-gdb) print sizeof (CORE_ADDR)

say?


H.J.




H.J.