Leif's BSS fix

diff --git a/grub-core/kern/arm/uboot/startup.S b/grub-core/kern/arm/uboot/startup.S
index 3e38698..2566136 100644 (file)
--- a/grub-core/kern/arm/uboot/startup.S
+++ b/grub-core/kern/arm/uboot/startup.S
@@ -99,8 +99,13 @@ FUNCTION(codestart)
        @ 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     r2, #0
+1:     tst     r0, #3
+       beq     2f
+       strb    r2, [r0], #1
+       b       1b
+2:     ldr     r1, =EXT_C(_end)                @ to here
 1:     str     r2, [r0], #4
        cmp     r0, r1
        bne     1b