linux-kernel - Re: [PATCH 12/12] i386 boot: Add an ELF header to bzImage

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Date:	Fri, 06 Oct 2006 14:54:12 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	vgoyal@...ibm.com, Andrew Morton <akpm@...l.org>,
	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Reloc Kernel List <fastboot@...ts.osdl.org>, ak@...e.de,
	horms@...ge.net.au, lace@...kratochvil.net, magnus.damm@...il.com,
	lwang@...hat.com, dzickus@...hat.com, maneesh@...ibm.com
Subject: Re: [PATCH 12/12] i386 boot: Add an ELF header to bzImage

Eric W. Biederman wrote:
> "H. Peter Anvin" <hpa@...or.com> writes:
> 
>> Vivek Goyal wrote:
>>> Hi Eric,
>>> I have added cld in the regenerated patch below.
>> No, the cld needs to be earlier.  It turns out this isn't the first use of
>> string instructions.
> 
> Can we rely on the int calls not setting df?  Otherwise we need to clear
> df at each use as we do with all of the later uses.
> 

Yes, we can, with a few exceptions.  INT saves the flags and IRET 
restores them.

	-hpa
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