=== modified file 'grub-core/kern/arm/uboot/startup.S'
--- grub-core/kern/arm/uboot/startup.S	2013-05-03 13:07:39 +0000
+++ grub-core/kern/arm/uboot/startup.S	2013-05-13 14:59:43 +0000
@@ -100,7 +100,13 @@
 	@ Since we _are_ the C run-time, we need to manually zero the BSS
 	@ region before continuing
 	ldr	r0, =EXT_C(__bss_start)	@ zero from here
-	ldr	r1, =EXT_C(_end)		@ to here
+	@ If unaligned, bytewise zero until base address aligned.
+	mov	r1, #0
+1:	tst	r0, #3
+	beq	2f
+	strb	r1, [r0], #1
+	b	1b
+2:	ldr	r1, =EXT_C(_end)		@ to here
 	mov	r2, #0
 1:	str	r2, [r0], #4
 	cmp	r0, r1