[syslinux] isolinux: Generate GPT and Mac bootable images

H. Peter Anvin hpa at zytor.com
Mon Aug 8 10:52:43 PDT 2011


On 08/05/2011 10:01 PM, Matthew Garrett wrote:
> On Fri, Aug 05, 2011 at 02:48:00PM -0700, H. Peter Anvin wrote:
> 
>> Hmmm... as I recall, you can't put a bunch of padding before the xorw
>> %bp, %bp... some broken BIOS requires that at offset 0... presumably
>> some specific M$ MBR had that instruction first, and someone decided to
>> use it as a magic signature.  Sigh.
> 
> Well that obviously makes things harder - we need to put ER at offset 0. 
> Have you got an example of one of them? I'll try to chase it down and 
> see if there's anything that can be done.
> 

Also, remember that you end up having actual execution of code at offset 0!

	-hpa




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