如何让GCC只生成机code，可直接加载到内存并执行？ [英] How to make gcc generate only machine code that can be loaded directly into memory and executed?

问题描述

我想产生一个文件，我可以加载到内存中（例如，使用 MMAP ），然后跳转到该内存的开始运行$ C $角

I would like to produce a file that I can load into memory (for example with mmap) and then jump to the start of that memory to run the code.

在理想情况下，我想无论是使得code重新定位（这可能是低效的），或者指定的code预计在（这是一种痛苦）被加载了明确地址的选项，但任何一个可能会很好地工作在自己。

Ideally, I'd like the option of either making the code relocatable (which might be inefficient) or specifying an explicit address that the code expects to be loaded at (which is a pain), but either one would probably work fine on its own.

推荐答案

您可以这样做，但你需要去通过目标文件格式。尤其是， objcopy把命令可以将一个可执行文件到扁平化的二进制文件（这取决于你的目标平台）。也许是这样的：

You can do this but you will need to go through the object file format. In particular, the objcopy command can transform an executable file to a "flat" binary file (depending on your target platform). Perhaps something like this:

gcc -o test test.c
objcopy -O binary test test.bin

请参阅男人objcopy把您的平台的更多细节。

See man objcopy on your platform for more details.

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