[PATCH] ARM: crypto: sha1-armv4-large.S: fix SP handling

[Nicolas Pitre]

On Wed, 15 May 2013, Ard Biesheuvel wrote:

> Make the SHA1 asm code ABI conformant by making sure all stack
> accesses occur above the stack pointer.
> 
> Origin:
> http://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=1a9d60d2
> 
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>

Acked-by: Nicolas Pitre <nico at linaro.org>

Please add

Cc: stable at vger.kernel.org

and send it to RMK's patch system.

>  arch/arm/crypto/sha1-armv4-large.S | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/crypto/sha1-armv4-large.S b/arch/arm/crypto/sha1-armv4-large.S
> index 92c6eed..99207c4 100644
> --- a/arch/arm/crypto/sha1-armv4-large.S
> +++ b/arch/arm/crypto/sha1-armv4-large.S
> @@ -195,6 +195,7 @@ ENTRY(sha1_block_data_order)
>  	add	r3,r3,r10			@ E+=F_00_19(B,C,D)
>  	cmp	r14,sp
>  	bne	.L_00_15		@ [((11+4)*5+2)*3]
> +	sub	sp,sp,#25*4
>  #if __ARM_ARCH__<7
>  	ldrb	r10,[r1,#2]
>  	ldrb	r9,[r1,#3]
> @@ -290,7 +291,6 @@ ENTRY(sha1_block_data_order)
>  	add	r3,r3,r10			@ E+=F_00_19(B,C,D)
>  
>  	ldr	r8,.LK_20_39		@ [+15+16*4]
> -	sub	sp,sp,#25*4
>  	cmn	sp,#0			@ [+3], clear carry to denote 20_39
>  .L_20_39_or_60_79:
>  	ldr	r9,[r14,#15*4]
> -- 
> 1.8.1.2
>