detours linux 用法

detours linux 用法
Detours is a software developed by Microsoft Research that allows developers to intercept and redirect functions in Windows executables. Although Detours is primarily designed for Windows operating systems, there are alternative methods for achieving similar functionality on Linux.
In Linux, developers often use dynamic linking and patching techniques to intercept function calls. One popular tool for this purpose is the LD_PRELOAD environment variable. LD_PRELOAD enables the preloading of shared libraries before other libraries, effectively intercepting function calls and allowing developers to redirect them to custom implementations.
To use Detours-like functionality on Linux, developers can follow these steps:
1. Create a new shared library: Begin by creating a new shared library using a programming language of your choice, such as C or C++. This library will contain the custom implementation of the intercepted functions.
2. Implement interception points: Identify the functions you want to intercept and redirect within the target executable. In your shared library, create function definitions with the same signature as the functions you wish to intercept.
3. Use LD_PRELOAD: Set the LD_PRELOAD environment variable to the absolute path of your shared library before executing the target executable. This will ensure that your shared library is loaded before any other libraries, allowing your custom implementations to take precedence.
4. Redirect function calls: Within your custom implementation, you can call the original function using the same name as the intercepted function, allowing you to capture the arguments and return values. Additionally, you have the freedom to modify the behavior of the function as desired.
Please note that although this method provides similar functionality to Detours on Linux, it requires manual interception and implementation of each function. Detours, on the other hand, automatically intercepts all function calls within a Windows executable.
In conclusion, to achieve Detours-like functionality on Linux, developers can use the LD_PRELOAD environment variable to intercept and redirect function calls. By creating a custom shared library and modifying the intercepted functions, developers have the flexibility to redirect the function behavior as desired.。