crt0.s

用于嵌入式Linux系统的标准C的库函数

# NEC V850 startup code

	.section .text
	.global	_start

_start:

#if defined __v850e__
	
	movea   255,		r0,	r20
	mov     65535,		r21
	mov     hilo(_stack),	sp
	mov     hilo(__ep),	ep
	mov     hilo(__gp),	gp
	mov     hilo(__ctbp),	r6
	ldsr    r6,             ctbp
	mov     hilo(_edata),	r6
	mov     hilo(_end),	r7
.L0:
	st.w    r0,		0[r6]
	addi    4,		r6,	r6
	cmp     r7,		r6
	bl      .L0
.L1:
	jarl    ___main,	r31
	addi    -16,		sp,	sp
	mov     0,		r6
	mov     0,		r7
	mov     0,		r8
	jarl    _main,		r31
	mov     r10,		r6
	jarl    _exit,		r31

# else
	movea   255,		r0,	r20
	mov     r0,		r21
	ori     65535,		r0,	r21
	movhi   hi(_stack),	r0,	sp
	movea   lo(_stack),	sp,	sp
	movhi   hi(__ep),	r0,	ep
	movea   lo(__ep),	ep,	ep
	movhi   hi(__gp),	r0,	gp
	movea   lo(__gp),	gp,	gp

	movhi   hi(_edata),	r0,	r6
	movea   lo(_edata),	r6,	r6
	movhi   hi(_end),	r0,	r7
	movea   lo(_end),	r7,	r7
.L0:
	st.b    r0,		0[r6]
	addi    1,		r6,	r6
	cmp     r7,		r6
	bl      .L0
.L1:
	jarl    ___main,	r31
	addi    -16,		sp,	sp
	mov     0,		r6
	mov     0,		r7
	mov     0,		r8
	jarl    _main,		r31
	mov     r10,		r6
	jarl    _exit,		r31

# endif

	.section .stack
_stack:	.long 	1