crt0.s

来自「标准c库代码,可以应用于各个系统提供了大量的基本函数」· S 代码 · 共 45 行

; h8/300 and h8/300h start up file.

#ifdef __H8300__

	.section .text
	.global	_start
_start:
	mov.w	#_stack,sp
	mov.w	#_edata,r0
	mov.w	#_end,r1
	mov.w	#0,r2
_loop:	mov.w	r2,@r0
	adds	#2,r0
	cmp	r1,r0
	blo	_loop
	jsr	@_main
	sleep

	.section .stack
_stack:	.word 	1

#endif

#ifdef __H8300H__

	.h8300h
	.section .text
	.global	_start
_start:
	mov.l	#_stack,sp
	mov.l	#_edata,er0
	mov.l	#_end,er1
	mov.w	#0,r2		; not sure about alignment requirements
_loop:	mov.w	r2,@er0		; playing it safe for now
	adds	#2,er0
	cmp.l	er1,er0
	blo	_loop
	jsr	@_main
	sleep

	.section .stack
_stack:	.long 	1

#endif