Unit 'Exec' Package
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SetFunction

Change a function vector in a library

Declaration

Source position: exec.pas line 1281

function SetFunction(

  Library_: PLibrary;

  FuncOffset: LongInt;

  NewFunction: TProcedure

):Pointer;

Arguments

FuncOffset

  

The offset of the function to be replaced

NewFunction

  

A Pointer to new function

Function result

Pointer to the old function that was just replaced

Description

SetFunction is a functional way of changing where vectors in a library point. They are changed in such a way that the checksumming process will never falsely declare a library to be invalid.

Warning

While it's more or less safe to patch a library vector with SetFunction() it's not possible to safely remove the patch later. So don't use this function if it can be avoided.


Documentation generated on: 2021-07-30