CTRDL

Implementation of common dl* APIs, along with custom additions, which can be used for loading and executing ELF files on the Nintendo 3DS.

Build

Download a prebuilt version, use as a CMake dependency, or build manually:

cmake -B Build -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE="$DEVKITPRO/cmake/3DS.cmake" -DCMAKE_BUILD_TYPE=Release
cmake --build Build --config Release
cmake --install Build --prefix Build/Release

Symbol resolution

Since all homebrew is statically linked by default, there's no way for a program to expose symbols to shared objects. This behaviour can be simulated by redeclaring ctrdlProgramResolver, which is called internally whenever a symbol has to be looked up in the program, or its dependencies. By default ctrdlProgramResolver returns NULL.

Additionally, a custom resolver can be passed to the extensions ctrdlOpen, ctrdlFOpen, ctrdlMap, which will be used at the relocation step, and which always precedes other lookup mechanisms (dlsym is not affected).

Limitations

• RTLD_LAZY, RTLD_DEEPBIND, and RTLD_NODELETE are not supported.