程序集文件:.a .s .asm之间的区别 [英] Assembly Files: Difference between .a .s .asm

问题描述

在MIPS模拟器"QTSpim"中，接受三种类型的文件:

In the MIPS simulator "QTSpim", three types of files are accepted:

• .a
• .s
• .asm

• .a
• .s
• .asm

这些文件类型之间是否有区别，如果是，区别是什么?

Is there a difference between those filetypes, and if yes, what is the difference?

推荐答案

在Unix/Linux系统中:

In Unix/Linux systems:

• .a是静态库(也就是使用ar(1)制作的多个.o文件的存档)的常用扩展名.动态库(也称为共享库)使用.so.
• .s用于asm编译器输出. (gcc -S foo.c生成asm输出，默认文件名为foo.s)
• .S用于手写的asm源文件. gcc -c foo.S通过C预处理程序运行它(因此您可以使用#include<>，#if，#define和C样式注释.)某些C头文件(例如asm/unistd.h)仅具有#define，依此类推.可以包含在.S中，以获取诸如__NR_write系统调用号之类的定义.

• .a is the usual extension for static libraries (aka Archives of multiple .o files, made with ar(1)). Dynamic libraries, aka Shared Objects, use .so.
• .s is used for asm compiler output. (gcc -S foo.c produces asm output, with a default filename of foo.s)
• .S is used for hand-written asm source files. gcc -c foo.S runs it through the C preprocessor (so you can use #include<>, #if, #define, and C-style comments.) Some C headers, like asm/unistd.h only have #defines, and so can be included in a .S to get definitions like __NR_write system call numbers, for example.

在x86中，有两种不同版本的asm语法:AT& T(由gcc之类的Unix编译器使用)和Intel/NASM(有两种方言，如MASM与NASM本身).

In x86, there are two separate versions of asm syntax: AT&T (used by Unix compilers like gcc), and Intel/NASM (with a couple dialects, like MASM vs. NASM itself).

.S适用于GNU as语法中的asm，无论是否使用任何C预处理器功能.

.S is appropriate for asm in GNU as syntax, whether you use any C preprocessor features or not.

在x86中，.asm通常与Intel语法NASM/YASM或MASM源代码关联.在x86之外，如果它使用

In x86, .asm is more often associated with Intel-syntax NASM/YASM, or MASM, source code. Outside of x86, it's probably a good choice for asm source files that could be assembled by the platform-specific assembler, if it uses different directives than GNU as.

glibc源树对所有asm使用.S源文件.

具有gcc背景的人们可能会将其MIPS组件放入.S或.s文件中，而具有更多NASM/YASM经验(或Windows)的人可能会选择.asm.

People with a gcc background might put their MIPS asm into .S or .s files, while people with more NASM/YASM experience (or Windows), might go for .asm.

我建议不要使用.s文件，因为很容易被gcc -S foo.c意外覆盖.

I'd recommend against .s files, because it's easy to accidentally overwrite with gcc -S foo.c.

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