Hello everyone,

I am currently doing reverse engineering work on BMW MG1 ECUs
using SWFL files in IDA Pro.

I understand that public SWFL/SWFK files extracted from vehicles
do not contain ELF information, and that MG1 reverse engineering
is therefore typically done manually (code → data → calibration).

However, I would like to better understand what exists in theory
versus what is accessible in practice during development:

- Do ELF files or linker map files exist internally for BMW MG1 ECUs?
- Are symbolized builds (or partially symbolized builds) used during MG1 development?
- Are A2L + ELF combinations used internally for calibration and debugging?
- Or is MG1 reverse engineering in practice entirely limited to SWFL files
  with manual memory mapping?

I am not asking for files or downloads, only trying to understand
what exists in OEM/internal environments versus what is publicly available.

Any clarification or experience-based insight on this topic would be appreciated.
Thanks.