Many implementations of PE loaders (manual mappers) struggle with proper TLS (Thread Local Storage) support. A common but often insufficient approach is to simply iterate over the TLS callbacks and invoke them with the DLL_PROCESS_ATTACH parameter. While this may work for some executables, it is inadequate for Rust binaries and other applications with more complex TLS initialization requirements.

My manual mapper addresses this issue. A write-up of the implementation and concept is available in the README, along with a small sample application that serves as a proof of concept.