Function: hook

Hooks an address by placing a jmp at the target and creating a trampoline to execute the original function.

This function is unsafe 🐉

from must be a valid address which can be written to, and must be a valid location to write a jmp of 5 or 14 bytes at.
to must be a valid target location, and must properly handle the requirements of the assembly at the jmp site.

If the from address is within 32-bits of the to address, will write a 5 byte jmp, otherwise will write a 14 byte jmp.

Parameters

from: int - the address to hook.
to: int - the address to redirect the from address to.

Exceptions

If virtual protect fails, or fails to get the underlying code len.

Return Value

Returns a Trampoline which can be used to execute the original code at the hooked location.