在Mach-o二进制文件中更改函数参考 [英] Changing function reference in Mach-o binary

问题描述

我需要将对mach-o二进制文件中的函数的引用更改为在我自己的dylib中定义的自定义函数.我现在要遵循的过程是

I need to change to reference of a function in a mach-o binary to a custom function defined in my own dylib. The process I am now following is,

1. 将对较早功能的引用替换为新功能.例如，使用sed从_fopen到_mopen.

我在 MachOView 中打开mach-o二进制文件，以找到实体的地址我想要改变.然后，我使用十六进制编辑器手动更改二进制文件中的信息.

I open the mach-o binary in MachOView to find the address of the entities I want to change. I then manually change the information in the binary using a hex editor.

有没有一种方法可以使这一过程自动化，即编写程序来读取符号，动态加载信息，然后在可执行文件中进行更改.我正在查看/usr/include/mach-o处的mach-o头文件，但不确定如何使用它们来获取此信息.是否存在任何库-C或python可以帮助实现同样的目的?

Is there a way I can automate this process i.e write a program to read the symbols, and dynamic loading info and then change them in the executable. I was looking at the mach-o header files at /usr/include/mach-o but am not entire sure how to use them to get this information. Do there exist any libraries present - C or python which help do the same?

推荐答案

有趣的问题，我正在尝试做与静态lib类似的事情；看看是否此帮助

interesting question, I am trying to do something similar to static lib; see if this helps

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