arm: relocate_code(): do not set register useless
In case we are still at relocation target address before relocation we
do not need to load the registers needed for relocation. We should
instead skip the whole relocation part and jump over to clear_bss
immediately.
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/arch/arm/cpu/ixp/start.S b/arch/arm/cpu/ixp/start.S
index 6126400..087f594 100644
--- a/arch/arm/cpu/ixp/start.S
+++ b/arch/arm/cpu/ixp/start.S
@@ -292,12 +292,12 @@
mov sp, r4
adr r0, _start
+ cmp r0, r6
+ beq clear_bss /* skip relocation */
mov r1, r6 /* r1 <- scratch for copy_loop */
ldr r2, _TEXT_BASE
ldr r3, _bss_start_ofs
add r2, r0, r3 /* r2 <- source end address */
- cmp r0, r6
- beq clear_bss
copy_loop:
ldmia r0!, {r9-r10} /* copy from source address [r0] */