U-boot for Marvell Kirkwood boards no longer work after the EABI changes introduced in commit f772acf8a584067033eff1e231fcd1fb3a00d3d9. This turns out to be caused by a stack alignment issue. The armv5te instructions ldrd/strd instructions require 8-byte alignment to work properly (otherwise undefined behavior), and start.S gave the stack a 12-byte alignment.
Tested on an OpenRD base board, where both printouts and ubifs stuff now works.
Signed-off-by: Simon Kagstrom simon.kagstrom@netinsight.net --- cpu/arm926ejs/start.S | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/cpu/arm926ejs/start.S b/cpu/arm926ejs/start.S index 8043322..ca520eb 100644 --- a/cpu/arm926ejs/start.S +++ b/cpu/arm926ejs/start.S @@ -171,7 +171,8 @@ stack_setup: #ifdef CONFIG_USE_IRQ sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ) #endif - sub sp, r0, #12 /* leave 3 words for abort-stack */ + sub sp, r0, #16 /* leave 3 words for abort-stack and */ + /* align stack for ldrd/strd */
clear_bss: ldr r0, _bss_start /* find start of bss segment */