[coreboot] xmmstack

Carl-Daniel Hailfinger c-d.hailfinger.devel.2006 at gmx.net
Fri Apr 3 12:27:07 CEST 2009

On 03.04.2009 11:51, Stefan Reinauer wrote:
> On 03.04.2009 4:16 Uhr, Carl-Daniel Hailfinger wrote:
>> And to be honest, I want to test how well Urbez' gcc+xmmstack solution
>> works out for the hard targets.
> Any idea where to get that one? All I could ever find was a single web
> page talking about it.

Urbez mailed it to me a few weeks ago with the following explanation:
> Remember that in some CPU's you must activate in CR4 the 9 bit, for work
> correctly.
>         movl    0x200,%eax #CR4 bit 9 for SSE
>         movl    %eax,%cr4
> The application is too primitive, but works fine.
> It uses pcre, for easy parse the *.s generated with gcc, in the Code
> of xmmstack.c say's the options that i use for generate the *.s assembly
> code:
> gcc -fomit-frame-pointer -fno-stack-protector *.c
> if you will you can delete the code for mmx registers, but can be util
> for another person.

It's attached to this mail.



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