[okl4-developer] OKL4 v2.1: Support of ARM Thumb instructionset

[Frank Kaiser]

Hi, Geoffrey

But I think it's not currently use, since I do not find any reference to
a relevant GNU compiler option concerning THUMB mode in the scripts
belonging to the build system (for instance in a Sconscript file of an
IGUANA task).

Regards
Frank
> -----Original Message-----
> From: Geoffrey Lee [mailto:glee at ok-labs.com]
> Sent: Tuesday, June 24, 2008 12:34 PM
> To: Frank Kaiser
> Cc: developer at okl4.org
> Subject: Re: [okl4-developer] OKL4 v2.1: Support of ARM Thumb
instructionset
> 
> I asked the kernel guys, they told me the main reason is you cannot
have
> inline assembly for ARM mode when compiling for thumb.  As well,
> generally ARM code is a bit faster than thumb.
> 
> Having said that, we do support running userland in thumb mode.
> 
> 	-gl