Alan Carvalho de Assis <acassis@gmail.com> test app for imx27

git-svn-id: svn://svn.berlios.de/openocd/trunk@1323 b42882b7-edfa-0310-969c-e2dbd0fdcd60

testing/examples/ledtest-imx27ads/crt0.S

@@ -0,0 +1,47 @@
+/* Sample initialization file */
+	
+	.extern	main
+	.extern	exit
+	
+/* .text is used instead of .section .text so it works with arm-aout too.  */
+	.text
+	.code 32
+	.align 	0
+
+	.global	_mainCRTStartup
+	.global	_start
+	.global	start
+start:
+_start:
+_mainCRTStartup:
+
+/* Start by setting up a stack */
+	/*  Set up the stack pointer to end of bss */
+	ldr	r3, .LC2
+	mov 	sp, r3
+
+	sub	sl, sp, #512	/* Still assumes 512 bytes below sl */
+
+	mov 	a2, #0		/* Second arg: fill value */
+	mov	fp, a2		/* Null frame pointer */
+	mov	r7, a2		/* Null frame pointer for Thumb */
+	
+	ldr	a1, .LC1	/* First arg: start of memory block */
+	ldr	a3, .LC2	/* Second arg: end of memory block */
+	sub	a3, a3, a1	/* Third arg: length of block */
+	
+	mov	r0, #0		/*  no arguments  */
+	mov	r1, #0		/*  no argv either */
+
+	bl	main
+	bl	exit		/* Should not return */
+
+	/* For Thumb, constants must be after the code since only 
+	positive offsets are supported for PC relative addresses. */
+	
+	.align 0
+.LC1:
+	.word	__bss_start__
+.LC2:
+	.word	__bss_end__
+