Question

我试图制作一个简单的汇编程序，即添加两个数字并显示它们，然后减去两个数字并显示它们。但是我遇到了错误：

oppgave3.asm:28: error: parser: instruction expected
oppgave3.asm:29: error: comma, colon, decorator or end of line expected after operand
oppgave3.asm:30: error: symbol `move' redefined
oppgave3.asm:30: error: parser: instruction expected
oppgave3.asm:31: error: comma, colon, decorator or end of line expected after operand
oppgave3.asm:32: error: comma, colon, decorator or end of line expected after operand
oppgave3.asm:33: error: comma, colon, decorator or end of line expected after operand
oppgave3.asm:37: error: symbol `move' redefined
oppgave3.asm:37: error: parser: instruction expected
oppgave3.asm:38: error: comma, colon, decorator or end of line expected after operand
oppgave3.asm:39: error: symbol `move' redefined
oppgave3.asm:39: error: parser: instruction expected
oppgave3.asm:40: error: comma, colon, decorator or end of line expected after operand
oppgave3.asm:41: error: comma, colon, decorator or end of line expected after operand
oppgave3.asm:42: error: comma, colon, decorator or end of line expected after operand

这就是我要做的事情：我有两个子程序，一个用于加法，一个用于减法。

section .data
a dw 4
b dw 2


section .bss
c resb 1

section .text
global_start:
_start:

call addition
mov eax,4
mov ebx,1
mov ecx,c
mov edx,1
int 0x80

call subtraction
mov eax,4
mov ebx,1
mov ecx,c
mov edx,1
int 0x80

addition:
move eax,[a]
sub eax '0'
move ebx,[b]
sub ebx '0'
add eax and ebx
add eax '0'
mov [c],eax
ret

subtraction:
move eax,[a]
sub eax '0'
move ebx,[b]
sub ebx '0'
sub eax and ebx
add eax '0'
mov [c],eax
ret

Answer 1

你写了“move”而不是“mov”

此外：移动eax，[a] sub eax'0' 移动ebx，[b] sub ebx'0' 添加eax和ebx 添加eax'0' mov [c]，eax 保留

减法：移动eax，[a] sub eax'0' 移动ebx，[b] sub ebx'0' sub eax和ebx 添加eax'0' mov [c]，eax 保留

Answer 2

我认为你有一个错字。你有一个“移动”指令，而我的猜测是它应该是“mov”而不是最后的额外e。我不是装配专家，所以我可能在这里错了。

试图添加和减去不工作的简单汇编代码

2 个答案: