Managed to copy ekern.dll along side epoc.exe so that debug session is made easy. ekern.dll is expected to export _E32Startup put it does not. Should ekern compile that k_entry.cpp file?
# component name "exFAT File System"
component base_f32_automounter
source \sf\os\kernelhwsrv\userlibandfileserver\fileserver\automounter
binary \sf\os\kernelhwsrv\userlibandfileserver\fileserver\automounter all
exports \sf\os\kernelhwsrv\userlibandfileserver\fileserver\automounter
notes_source \component_defs\release.src
ipr B