[ 007/127] ARM: 7723/1: crypto: sha1-armv4-large.S: fix SP handling

From: Greg Kroah-Hartman
Date: Wed Jun 05 2013 - 18:12:04 EST


3.9-stable review patch. If anyone has any objections, please let me know.

------------------

From: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxx>

commit 934fc24df10abfd5aff533d0d044a17669d77d79 upstream.

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@xxxxxxxxxx>
Acked-by: Nicolas Pitre <nico@xxxxxxxxxx>
Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
arch/arm/crypto/sha1-armv4-large.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- 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]


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