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Date: Mon, 17 Oct 2005 21:05:00 -0000
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From: Mark Kettenis <mark.kettenis@xs4all.nl>
To: pgilliam@us.ibm.com
CC: gdb-patches@sources.redhat.com
In-reply-to: <200510171332.13857.pgilliam@us.ibm.com> (message from Paul
	Gilliam on Mon, 17 Oct 2005 13:32:13 -0700)
Subject: Re: [PATCH] allow gdb to access altivec registers
References:  <200510171332.13857.pgilliam@us.ibm.com>
X-SW-Source: 2005-10/txt/msg00143.txt.bz2

> From: Paul Gilliam <pgilliam@us.ibm.com>
> Date: Mon, 17 Oct 2005 13:32:13 -0700
> 
> In rs6000-tdep.c (rs6000_gdbarch_init), bfd_mach_ppc64 is assumed to NOT have
> altivec registers.
> 
> This patch makes it assume that it does.  This works for machines with the
> IBM PowerPC 970 chip, an IBM JS-20 or Apple G5 for example.
> 
> If the bfd_mach_ppc64 should happen to NOT have an altivec unit, the ptrace
> to get the vector registers will fail the first time it's called and it will
> never be called again.

You're assuming Linux here, but this is generic POWER/PowerPC code.
Unless there are no 64-bit POWER/PowerPC implementations without
AltiVec unit, this patch is wrong.

Mark