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-rw-r--r--Debugger/undef_handler.S4
1 files changed, 2 insertions, 2 deletions
diff --git a/Debugger/undef_handler.S b/Debugger/undef_handler.S
index 385bf0c..61b8a5d 100644
--- a/Debugger/undef_handler.S
+++ b/Debugger/undef_handler.S
@@ -41,7 +41,7 @@ undef_handler:
tst r1, #CPSR_THUMB /* Check for Thumb Mode */
beq _is_arm /* Clear, so it's ARM mode */
_is_thumb:
- sub r0, lr, #-2 /* LR points to instruction after UNDEF instruction */
+ sub r0, lr, #2 /* LR points to instruction after UNDEF instruction */
stmfd sp!, {r0,r1} /* Save UNDEF instruction addr and previous mode's CPSR to stack */
ldrh r0, [r0] /* load UNDEF instruction into r0 */
ldr r1, =BKPT16_ENUM_MASK /* Thumb BKPT enum mask */
@@ -55,7 +55,7 @@ _is_thumb:
ldr lr, =dbg__thumb_bkpt_handler /* handle BKPT, BKPT index in r0 */
mov pc, lr /* Invoke Debugger State (Supervisor Mode) */
_is_arm:
- sub r0, lr, #-4 /* LR points to instruction after UNDEF instruction */
+ sub r0, lr, #4 /* LR points to instruction after UNDEF instruction */
stmfd sp!, {r0,r1} /* Save UNDEF instruction addr and previous mode's CPSR to stack */
ldr r0, [r0] /* load UNDEF instruction into r0 */
ldr r1, =BKPT32_ENUM_MASK /* ARM BKPT enum mask */