[syslinux] PXELINUX: how to debug initrd corruption?

[H. Peter Anvin]

On 02/11/2012 04:11 PM, Andy Walls wrote:
>
> It appears that the EFI firmware and PXELINUX v3.11 were stomping on
> each other in the memory range 0x800-0xfff.  Upgrading to PXELINUX v4.05
> resolved the problem for me.
>
> Sadly the E820 map (and hence meminfo.c32) did not report the use of
> 0x800-0xfff by the firmware (or 0x0-7ff for that matter).  The memmap
> command from the EFI shell did report the usage of 0x0-0xfff however.
>
> Crummy firmware code.... :(
>

Yes, that would be a blatant bug as far as a CSM is concerned.

	-hpa