Sym info

README.md

@@ -1,8 +1,8 @@
 # CTRDL
 
-This library provides an implementation of common `dl*` APIs along with custom additions, which can be used for loading and executing ELF files on the Nintendo 3DS.
+Implementation of common `dl*` APIs, along with custom additions, which can be used for loading and executing ELF files on the Nintendo 3DS.
 
-## How-to
+## Build
 
 Download a [prebuilt](https://github.com/kynex7510/CTRDL/releases) version, use as a CMake dependency, or build manually:
 
@@ -12,7 +12,12 @@ 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.
-- `NULL` pseudo path for main process is not supported.
+- `RTLD_LAZY`, `RTLD_DEEPBIND`, and `RTLD_NODELETE` are not supported.