Added documentation for wine LoadLibrary workaround
ADD
qemu_mode/README.wine.md
+# How to troubleshoot AFL++'s wine mode
+
+## 1) Debugging
+To turn on wine debugging use the `WINEDEBUG` environment variable,
+e.g. `WINEDEBUG=+timestamp,+tid,+loaddll`.
+
+## 2) LoadLibraryA workaround
+The forked process fails to load libraries loaded via `LoadLibrary`
+if the load happens after the entry point (error code: 87). To resolve
+this issue, one needs to load any external libraries before the fork happens.
+
+An early DLL load can be achieved by adding the DLL name into the `Import Directory`
+in the PE file. Such an entry can be added manually in any PE editor.
+
+Alternativly, one can generate a `.lib` file from the DLL exports and link
+them together with the harness to create an entry in the `Import Directory`.
+Use `dumpbin /exports <filename>.dll` to extract the exports and paste the
+exported function names into a `.def` file. Use `lib /def:<deffile> /OUT:<libfile>`
+to generate a `.lib` and add the library to the linker options. Once the usage of
+an export is detected (`__declspec(dllimport)`), the
+linker adds the early DLL load.
\ No newline at end of file

Added documentation for wine LoadLibrary workaround (#933)