plthook failed to hook function calls of system library on macOS platform about plthook HOT 2 CLOSED

Thanks for reporting the issue. I'll fix the segmentation fault later.

I have a question. Do you want to hook read/write called by libSystem.B.dylib?
The _read symbol is undefined in libSystem.B.dylib.

$ nm /usr/lib/libSystem.B.dylib | grep ' _read$'
                 U _read

It is defined in /usr/lib/system/libsystem_kernel.dylib

$ nm /usr/lib/system/libsystem_kernel.dylib | grep ' _read$'
0000000000002ee8 T _read

Otherwise do you want to hook all read/write calls? If the latter, use funchook instead.

from plthook.

Thanks for your prompt reply. I tried to hook "/usr/lib/libc.dylib" but segmentation fault also happened. funchook tool really works well.

from plthook.