[rtems commit] bsps/arm: Copy vector table only if necessary

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    9ce658030a0d772ee135d8158531e69b2696ab97
Changeset: http://git.rtems.org/rtems/commit/?id=9ce658030a0d772ee135d8158531e69b2696ab97

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Thu May  2 13:37:30 2013 +0200

bsps/arm: Copy vector table only if necessary

---

 c/src/lib/libbsp/arm/shared/start/start.S |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/c/src/lib/libbsp/arm/shared/start/start.S b/c/src/lib/libbsp/arm/shared/start/start.S
index 9954a87..cb91d41 100644
--- a/c/src/lib/libbsp/arm/shared/start/start.S
+++ b/c/src/lib/libbsp/arm/shared/start/start.S
@@ -186,11 +186,15 @@ bsp_start_hook_0_done:
 
 	ldr	r0, =bsp_vector_table_begin
 	adr	r1, bsp_start_vector_table_begin
+	cmp	r0, r1
+	beq	bsp_vector_table_copy_done
 	ldmia	r1!, {r2-r9}
 	stmia	r0!, {r2-r9}
 	ldmia	r1!, {r2-r9}
 	stmia	r0!, {r2-r9}
 
+bsp_vector_table_copy_done:
+
 	SWITCH_FROM_ARM_TO_THUMB	r0
 
 	/* Branch to start hook 1 */