From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christian Hildner <christian.hildner@hob.de>
Subject: Re: C structures and gas
Date: Thu, 28 Nov 2002 07:15:59 +0100
Sender: linux-assembly-owner@vger.kernel.org
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To: Corey Holcomb-Hockin <crsntlvs@ipeg.com>
Cc: linux-assembly@vger.kernel.org

Corey Holcomb-Hockin schrieb:

> What is the best way to access C structures with gas assembly?  I
> haven't gotten any good ideas from looking at assembly generated from C
> code.  It looks like it keeps track of offsets and the size of
> structures on its own.  I would have a hard time keeping track of
> offsets and changing them if the structure changed.
>
> Corey Holcomb-Hockin
>

Have a look how linux does this in the ia64 tree. See
/usr/src/linux/arch/ia64/tools/print_offset.c.
There are three steps:

1. compile print_offsets
2. run print_offsets (creates offsets.h)
3. include offsets.h into *.S

Christian