拆开微软Visual Studio 2003中的编译器输出 [英] Disassemble Microsoft Visual Studio 2003 compiler output

问题描述

我看到什么，我认为是由微软的Visual Studio 2003工具从目标文件输出奇怪的行为。在文件工具告诉我：

I'm seeing what I think is strange behaviour from object files output by the Microsoft Visual Studio 2003 tools. The file utility tells me:

asmfile.obj: 80386 COFF executable not stripped - version 30821

有关由汇编器创建的对象，但对物体C文件来了，我得到的只是：

For objects created by the assembler, but for objects coming from C files, I get just:

cfile.obj: data

使用微软的 DUMPBIN 实用程序和 objdump的我从Cygwin的话，我可以拆卸组装建造的文件，但我得到任何效用的C-内置文件中没有有用的结果。

Using Microsoft's dumpbin utility and the objdump I got from cygwin, I can disassemble the assembly-built file, but I get no useful results from either utility for the C-built files.

我有几个与此相关的差异问题：

I have a couple of questions related to this difference:

1. 什么是由MSVC2003编译器生成的目标文件格式？


2. 我怎么能反汇编目标文件？

我在得到在AT＆放拆装特别感兴趣; T语法 - 我正在做一个大的源代码库的一个端口，使其与海湾合作委员会的工作，我想用这种方法作为一种快捷方式对于一些内联汇编程序的项目。

I am particularly interested in getting the disassembly in AT&T syntax - I'm doing a port of a large source base to make it work with GCC, and I would like to use this method as a shortcut for some of the inline assembly routines in the project.

编辑：添加一些更多的信息

Adding some more information.

当我运行 DUMPBIN 对这些文件中的一个没有给我的结果：

When I run dumpbin on one of these files gives me no results:

C:\> dumpbin /disasm Func.obj
Microsoft (R) COFF/PE Dumper Version 7.10.6030    
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file Func.obj

FileType: ANONYMOUS OBJECT

使用 objdump的，它提供了：

$ objdump -d Func.obj
objdump: Func.obj: File truncated

在从汇编建立了文件，我得到合理的结果。

On the files built from assembly, I get reasonable results.

再次编辑：添加命令行信息

Edit again: Adding command line information.

该汇编文件都建有一个命令行类似以下内容：

The assembly files are built with a command line resembling the following:

ml -nologo -W3 -WX -c -coff -FoAssemblyFile.obj -Zi -Cx AssemblyFile.asm

当自行执行

毫升说：

Microsoft (R) Macro Assembler Version 6.15.8803
Copyright (C) Microsoft Corp 1981-2000.  All rights reserved.

的C文件都建有下面的命令：

The C files are built with the following command:

cl -nologo -W4 -WX -Gs32768 -GX -Gy -c -FdCFile.pdb -FoCFile.obj -Zi 
   -Gm -O1 -Oy- -Gy -GL -X CFile.c

有一些 -I 和 -D 传递给选项毫升和 CL ，但是我在这里省略了对它们的简洁。在 CL 选项描述的此处。

There are some -I and -D options passed to ml and to cl, but I've omitted them for brevity here. The cl options are described here.

推荐答案

被添加到这个问题的基础上的CL命令行选项编辑：

Edit based on the cl command line options being added to the question:

我认为这个问题是使用 / GL 选项，它指定链接时code一代的优化会做的。从该选项的文档页面：

I think the problem is the use of the /GL option, which specifies that link-time code generation optimization will be done. from a doc page on that option:

OBJ与/ GL生成的文件将无法使用这些链接公用事业EDITBIN和DUMPBIN。

obj files produced with /GL will not be available to such linker utilities as EDITBIN and DUMPBIN.

使用此选项时，编译器生成的链接器可以对执行程序范围内的优化 .OBJ 文件 - 显然文件格式是专有的（也许它某处记载，但我怀疑不是）。

Using this option causes the compiler to generate .obj files that the linker can perform program-wide optimization on - apparently the file format is proprietary (maybe it's documented somewhere, but I suspect not).

为 / GL 的文档（也称为整个程序优化，链接时code一代，或LTCG）包含有关互操作性的几个警告包含这些对象的文件 .OBJ 文件或库中。

The docs for /GL (also known as "whole program optimization", "link-time code generation", or LTCG) contain several warnings about interoperability of the .obj files or libraries containing such objects files.

原来的答复：

到底是在C源你试图拆卸obj文件怎么办？我得到使用下面的 DUMPBIN / DISASM test.obj 一个简单的'Hello World程序：

What exactly is in the C source for the .obj file you're trying to disassemble? I get the following using dumpbin /disasm test.obj for a simple 'hello world' program:

Microsoft (R) COFF/PE Dumper Version 8.00.50727.42
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file test.obj

File Type: COFF OBJECT

_main:
  00000000: 55                 push        ebp
  00000001: 8B EC              mov         ebp,esp
  00000003: 6A 01              push        1
  00000005: 68 00 00 00 00     push        offset $SG4665
  0000000A: E8 00 00 00 00     call        _printf
  0000000F: 83 C4 08           add         esp,8
  00000012: 33 C0              xor         eax,eax
  00000014: 3B EC              cmp         ebp,esp
  00000016: E8 00 00 00 00     call        __RTC_CheckEsp
  0000001B: 5D                 pop         ebp
  0000001C: C3                 ret

  Summary

         7AC .debug$S
          30 .debug$T
          2F .drectve
           4 .rdata
           4 .rtc$IMZ
           4 .rtc$TMZ
          1D .text

请注意：这是利用和被VS2005提供的 DUMPBIN ，但我可以编一个 .OBJ 文件难以想象这些东西会从VS2003太大的改变。

Note: this is using an .obj file compiled by and a dumpbin provided by VS2005, but I can't imagine this stuff would have changed much from VS2003.

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