[英]Stepping into a GNU function with gdb
I would like to understand the internal workings of C's memcpy function. 我想了解C的memcpy函数的内部工作原理。 Is there a way for me to step into the function using gdb? 有没有办法让我使用gdb进入函数?
Sure. 当然。 When you get to a memcpy
call, use si
(step instruction) to step into the assembly. 当你进行memcpy
调用时,使用si
(步骤指令)进入程序集。
You will only get source if you have a debug build of libc and the glibc sources handy, though. 但是,如果你有一个libc的调试版本和glibc源,你只会获得源代码。
If you want to just see the implementation, check out eg memcpy-ssse3.S or memcpy.S . 如果您只想查看实现,请查看例如memcpy-ssse3.S或memcpy.S 。
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