[U-Boot] [U-Boot, v3] arm: build arch memset/memcpy in Thumb2 mode

[Tom Rini]

On Thu, Dec 18, 2014 at 06:10:33PM +0100, Stefan Agner wrote:

> Resynchronize memcpy/memset with kernel 3.17 and build them in
> Thumb2 mode (unified syntax). Those assembler files can be built
> and linked in ARM mode too, however when calling them from Thumb2
> built code, the stack got corrupted and the copy did not succeed
> (the exact details have not been traced back). However, the Linux
> kernel builds those files in Thumb2 mode. Hence U-Boot should
> build them in Thumb2 mode too when CONFIG_SYS_THUMB_BUILD is set.
> 
> To build the files without warning, some assembler instructions
> had to be replaced with their UAL compliant variant (thanks
> Jeroen for this input).
> 
> To build the file in Thumb2 mode the implicit-it=always option need
> to be set to generate Thumb2 compliant IT instructions where needed.
> We add this option to the general AFLAGS when building for Thumb2.
> 
> Reviewed-by: Simon Glass <sjg at chromium.org>
> Tested-by: Simon Glass <sjg at chromium.org>
> Signed-off-by: Stefan Agner <stefan at agner.ch>

Applied to u-boot/master, thanks!

-- 
Tom
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