1 files changed, 75 insertions, 0 deletions
diff --git a/newlib/libc/sys/arc/crt0.S b/newlib/libc/sys/arc/crt0.S
new file mode 100644
index 000000000..346339774
--- /dev/null
+++ b/newlib/libc/sys/arc/crt0.S
@@ -0,0 +1,75 @@
+; ARC start up file
+; In the absence of a custom linker script, go with something simple.
+; We do not support passing arguments to "main", but this is an embedded
+; system anyway.
+;
+; We call init/fini here without cpu prefixes because there is always
+; only one .init/.fini section per image.
+
+	.section .text
+	.align 4
+
+	.global	start
+start:
+
+	mov	sp,end		; Round "sp" up to page after "end".
+	add	sp,sp,4095
+	and	sp,sp,-4096
+
+	ld	r8,[stack_size]	; Add stack size to "sp".
+	add	sp,sp,r8
+
+	st	sp,[sbrk_start]	; Initialize malloc heap.
+	st	sp,[sbrk_loc]
+
+	sub	sp,sp,16	; callee expects 16 bytes already "pushed".
+	mov	fp,0		; Top of stack frame indicator.
+
+	mov	r0,edata	; Zero bss.
+	mov	r2,end
+	sub	r2,r2,r0
+	mov	r1,0
+
+#ifdef __base__
+	bl.nd	_memset
+	bl.nd	init		; .init section entry point.
+	mov	r0,%st(fini)	; .fini section entry point.
+	bl.nd	_atexit
+	mov	r0,0		; argc
+	mov	r1,0		; argv
+	bl.nd	_main
+	bl.nd	_exit
+#endif
+
+#ifdef __host__
+	bl.nd	_host_memset
+	bl.nd	init		; .init section entry point.
+	mov	r0,%st(fini)	; .fini section entry point.
+	bl.nd	_host_atexit
+	mov	r0,0		; argc
+	mov	r1,0		; argv
+	bl.nd	_host_main
+	bl.nd	_host_exit
+#endif
+
+#ifdef __graphics__
+	bl.nd	_graphics_memset
+	bl.nd	init		; .init section entry point.
+	mov	r0,%st(fini)	; .fini section entry point.
+	bl.nd	_graphics_atexit
+	mov	r0,0		; argc
+	mov	r1,0		; argv
+	bl.nd	_graphics_main
+	bl.nd	_graphics_exit
+#endif
+
+#ifdef __audio__
+	bl.nd	_audio_memset
+	bl.nd	init		; .init section entry point.
+	mov	r0,%st(fini)	; .fini section entry point.
+	bl.nd	_audio_atexit
+	mov	r0,0		; argc
+	mov	r1,0		; argv
+	bl.nd	_audio_main
+	bl.nd	_audio_exit
+#endif