X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=betty%2Fstartup.s;h=fb42ac7deecf00f97af2e2bf7053221bb53675b6;hb=6292cc9190f6e7f36a3634057740e770d58d7460;hp=d6b0184641a3d02d4af553c485ad929a4f80e42e;hpb=ac35214abd7d42a7294047d1c8b7ce7552a38fbf;p=my-code%2Farm.git

diff --git a/betty/startup.s b/betty/startup.s
index d6b0184..fb42ac7 100644
--- a/betty/startup.s
+++ b/betty/startup.s
@@ -102,12 +102,15 @@ handle_reset:
 	ldr r0, =stack_limit
 	mov sl, r0
 
-	# copy data section
+	# copy data section (only if we are in flash <=> _etext != _data)
 
 	ldr r1, =_etext
 	ldr r2, =_data
 	ldr r3, =_edata
 
+	cmp r1, r2
+	beq start_of_c_code
+
 copy_data_loop:
 
 	cmp r2, r3
@@ -117,6 +120,8 @@ copy_data_loop:
 
 	# jump to c code
 
+start_of_c_code:
+
 	adr lr, loop_forever
 	mov r0, #0
 	mov r1, #0