crtn.s

嵌入式操作系统T-Kernel 完整代码

/*
 *----------------------------------------------------------------------
 *    T-Kernel
 *
 *    Copyright (C) 2004 by Ken Sakamura. All rights reserved.
 *    T-Kernel is distributed under the T-License.
 *----------------------------------------------------------------------
 *
 *    Version:   1.01.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2004/6/28.
 *
 *----------------------------------------------------------------------
 */

/*
 *	@(#)crtn.S (M32R)
 *
 *	C startup 
 */

#include <machine.h>

	.section .ctors
	.balign	4
__CTOR_END__:
	.int	0

	.section .dtors
	.balign	4
__DTOR_END__:
	.int	0


	.section .init, "ax", @progbits
	.balign	4
// _init:
	st	r8, @-sp
	st	r9, @-sp
	seth	r8, #shigh(__DTOR_END__)
	add3	r8, r8, #low(__DTOR_END__)
	ldi	r9, #-1
	bra	l1
  l_exec_ctors:
	jl	r4
  l1:
	addi	r8, #-4
	ld	r4, @r8
	bne	r4, r9, l_exec_ctors
	ld	r9, @sp+
	ld	r8, @sp+

	mv	sp, fp
	ld	lr, @sp+
	ld	fp, @sp+
	jmp	lr

	.section .fini, "ax", @progbits
	.balign	4
// _fini:
	mv	sp, fp
	ld	lr, @sp+
	ld	fp, @sp+
	jmp	lr