From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Jacobowitz <drow@mvista.com>
To: "H . J . Lu" <hjl@lucon.org>
Cc: 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 09:53:00 -0000
Message-id: <20010808095401.B23955@nevyn.them.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>
X-SW-Source: 2001-08/msg00073.html

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.

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer