From fe1d75efc5b2f6b7f542ceedff3d5fa89ffc7e6b Mon Sep 17 00:00:00 2001
From: Thomas Winwood <twwinwood@gmail.com>
Date: Thu, 9 May 2019 15:08:11 +0100
Subject: [PATCH] Two small tweaks to crt0.s

* The use of r3 in the block which copies the .data section into IWRAM is unnecessary.
* The return label in the IRQ handler doesn't need to be global.
---
 crt0.s | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/crt0.s b/crt0.s
index 53437f1..8204942 100644
--- a/crt0.s
+++ b/crt0.s
@@ -24,8 +24,8 @@ __start:
     @ copy .data section to IWRAM
     ldr r0, =__data_lma     @ source address
     ldr r1, =__data_start   @ destination address
-    ldr r3, =__data_end
-    sub r2, r3, r1
+    ldr r2, =__data_end
+    sub r2, r2, r1
     beq .Lskip              @ don't try to copy an empty .data section
     add r2, #3
     mov r2, r2, asr #2      @ length (in words)
@@ -69,9 +69,9 @@ MainIrqHandler:
     ldr r2, =__IRQ_HANDLER
     ldr r1, [r2]
     stmdb sp!, {lr}
-    adr lr, MainIrqHandler_Return
+    adr lr, .Lreturn
     bx r1
-MainIrqHandler_Return:
+.Lreturn:
     ldmia sp!, {lr}
 
     @ Switch to IRQ mode