The mORMot[1] sources could give you some info. During runtime, it patches the exe-memory to redirect function calls. Hard part was to get around the W^X memory protection on some BSD's.
Look at: procedure PatchCode(Old,New: pointer; Size: integer; Backup: pointer; inside SynCommons.pas function TInterfaceFactory.GetMethodsVirtualTable: pointer; inside mORMot.pas _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel
