build/kernel.elf:     file format elf64-littleriscv


Disassembly of section .text:

0000000080000000 <_start>:
.section .text.entry
.global _start

_start:
  # 初始化栈（使用链接脚本中定义的 stack_top）
  la sp, stack_top
    80000000:	00000117          	auipc	sp,0x0
    80000004:	0a010113          	addi	sp,sp,160 # 800000a0 <stack_top>

  # 调用 main 函数
  call main
    80000008:	030000ef          	jal	80000038 <main>

000000008000000c <loop>:

  # main 返回后进入死循环
loop:
  j loop
    8000000c:	a001                	j	8000000c <loop>

000000008000000e <add>:

int add(int a, int b) {
    8000000e:	1101                	addi	sp,sp,-32
    80000010:	ec22                	sd	s0,24(sp)
    80000012:	1000                	addi	s0,sp,32
    80000014:	87aa                	mv	a5,a0
    80000016:	872e                	mv	a4,a1
    80000018:	fef42623          	sw	a5,-20(s0)
    8000001c:	87ba                	mv	a5,a4
    8000001e:	fef42423          	sw	a5,-24(s0)
  return a + b;  // 待调试的函数
    80000022:	fec42783          	lw	a5,-20(s0)
    80000026:	873e                	mv	a4,a5
    80000028:	fe842783          	lw	a5,-24(s0)
    8000002c:	9fb9                	addw	a5,a5,a4
    8000002e:	2781                	sext.w	a5,a5
}
    80000030:	853e                	mv	a0,a5
    80000032:	6462                	ld	s0,24(sp)
    80000034:	6105                	addi	sp,sp,32
    80000036:	8082                	ret

0000000080000038 <main>:

int main() {
    80000038:	7179                	addi	sp,sp,-48
    8000003a:	f406                	sd	ra,40(sp)
    8000003c:	f022                	sd	s0,32(sp)
    8000003e:	1800                	addi	s0,sp,48
  int x = 5;
    80000040:	4795                	li	a5,5
    80000042:	fef42623          	sw	a5,-20(s0)
  int y = 3;
    80000046:	478d                	li	a5,3
    80000048:	fef42423          	sw	a5,-24(s0)
  int result = add(x, y);
    8000004c:	fe842703          	lw	a4,-24(s0)
    80000050:	fec42783          	lw	a5,-20(s0)
    80000054:	85ba                	mv	a1,a4
    80000056:	853e                	mv	a0,a5
    80000058:	fb7ff0ef          	jal	8000000e <add>
    8000005c:	87aa                	mv	a5,a0
    8000005e:	fef42223          	sw	a5,-28(s0)
  volatile char *tohost_addr = (volatile char *)(0x80001000 - 4);
    80000062:	200007b7          	lui	a5,0x20000
    80000066:	3ff78793          	addi	a5,a5,1023 # 200003ff <_start-0x5ffffc01>
    8000006a:	078a                	slli	a5,a5,0x2
    8000006c:	fcf43c23          	sd	a5,-40(s0)
  *tohost_addr = 0xff;
    80000070:	fd843783          	ld	a5,-40(s0)
    80000074:	577d                	li	a4,-1
    80000076:	00e78023          	sb	a4,0(a5)
  *tohost_addr = result;
    8000007a:	fe442783          	lw	a5,-28(s0)
    8000007e:	0ff7f713          	zext.b	a4,a5
    80000082:	fd843783          	ld	a5,-40(s0)
    80000086:	00e78023          	sb	a4,0(a5)
  return 0;
    8000008a:	4781                	li	a5,0
}
    8000008c:	853e                	mv	a0,a5
    8000008e:	70a2                	ld	ra,40(sp)
    80000090:	7402                	ld	s0,32(sp)
    80000092:	6145                	addi	sp,sp,48
    80000094:	8082                	ret