"no such instruction error" 组装数组声明时:

"no such instruction error" when assembling an array declaration:

我有如下一段 x86 汇编代码:

 1
 2        .text
 3
 4        .data
 5
 6        # define an array of 3 dwords
 7        array_word DW 1, 2, 3
 8
 9
10        .globl main
11
12main:
13 # nothing interesting ..
14

但是当我编译这个时,我不断收到以下错误:

$ gcc my_asm.s 
my_asm.s: Assembler messages:
my_asm.s:7: Error: no such instruction: `array_word DW 1,2,3'

这是我使用的 gcc:

$ gcc --version
gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

您的语法错误 - gas(由 gcc 为汇编文件调用)使用与 NASM.

等其他汇编程序不同的语法

使用

array_word: .word 1, 2, 3

另见 https://sourceware.org/binutils/docs/as/Word.html#Word

请注意,.word 的结果是目标 CPU 特定的 - 替代方案是 .hword:

7.60 .hword expressions

This expects zero or more expressions, and emits a 16 bit number for each.

This directive is a synonym for .short; depending on the target architecture, it may also be a synonym for .word.

顺便说一句:您在评论中说 # define an array of 3 dwords - 但请注意 DWDefine Word,它定义了一个 16 位字。在 NASM 中,您将对 32 位字使用 DD