assembly - 如何使用 nasm 编译 x86 汇编代码？我收到一个错误

Question

我一直在尝试在 Linux 上学习 x86 汇编，这是我的代码：

.386
.model flat
.code
start PROC
    mov eax, 100
    add eax, 200

    ret
start endp
end start

每当我尝试用 nasm 编译它时，就像这样：

nasm -f elf32 -o <filename>.o <filename>.asm
ld -m elf_i386 -o <filename> <filename>.o

我收到此错误：

simple.asm:1: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
simple.asm:1: error: attempt to define a local label before any non-local labels
simple.asm:2: error: attempt to define a local label before any non-local labels
simple.asm:2: error: parser: instruction expected
simple.asm:3: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
simple.asm:3: error: attempt to define a local label before any non-local labels
simple.asm:4: error: parser: instruction expected
simple.asm:9: error: symbol `start' redefined
simple.asm:9: error: parser: instruction expected
simple.asm:10: error: parser: instruction expected

为什么我会收到这个错误？是编译器还是代码？以及如何解决？

标签： assemblyx86intel