Signed-off-by: Tonny Tzeng <tonny.tz...@gmail.com>
---
arch/arm/cpu/arm720t/start.S | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/arch/arm/cpu/arm720t/start.S b/arch/arm/cpu/arm720t/start.S
index 90b7240..fd06298 100644
--- a/arch/arm/cpu/arm720t/start.S
+++ b/arch/arm/cpu/arm720t/start.S
@@ -459,6 +459,12 @@ lock_loop:
mov r0, sp
.endm
+ .macro bad_restore_user_regs
+ ldr lr, [sp, #S_PSR] @ Get SVC cpsr
+ msr spsr_cxsf, lr
+ ldmia sp, {r0 - pc}^ @ Restore SVC registers
+ .endm
+
.macro irq_save_user_regs
sub sp, sp, #S_FRAME_SIZE
stmia sp, {r0 - r12} @ Calling r0-r12
@@ -510,6 +516,7 @@ undefined_instruction:
get_bad_stack
bad_save_user_regs
bl do_undefined_instruction
+ bad_restore_user_regs
.align 5
software_interrupt:
--
1.6.0.6
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