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Re: 8-byte register values on a 32-bit machine

From: Andrew Cagney <ac131313 at redhat dot com>
To: Joel Brobecker <brobecker at gnat dot com>
Cc: Mark Kettenis <kettenis at chello dot nl>,Michael Elizabeth Chastain <mec at shout dot net>, gdb at sources dot redhat dot com
Date: Sat, 01 Mar 2003 18:41:42 -0500
Subject: Re: 8-byte register values on a 32-bit machine
References: <200302240235.h1O2Zws05373@duracef.shout.net> <864r6n5hw2.fsf@elgar.kettenis.dyndns.org> <20030301190929.GF11181@gnat.com>

I think we've lost the stabs battle. So I started to look into the
DWARF2 format, but could not find anything that helps. Does anybody know
if this format supports this sort of situation?

Dwarf2 has the idea of a location expression. It lets GCC specify something like:

Reg %eax piece 4, Reg %ecx, piece 4

This is what is behind the dwarf2expr* et.al. changes. I'd download a copy of the dwarf2 spec (see .../gdb/links/ but note that, right now the m/c might be down - I got an e-mail last night indicating a temp outage).

Andrew

References:
- Re: 8-byte register values on a 32-bit machine
  - From: Mark Kettenis
- Re: 8-byte register values on a 32-bit machine
  - From: Joel Brobecker

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