https://stackoverflow.com/questions/63378507/how-to-decompile-stm8-firmware
Honestly I'd be surprised if there was much worth while. The 8-bit micro's have quite convoluted compiler and optimization methods. The code may also have been written in assembler originally, and not some higher language.
Generally the best approach is to make the disassembly very crisp, with a good break down of subroutines, branching, control loops, use cross referencing and variable/subroutine labelling. If you can't find specific tools to do that, write some simple parsing scripts for the disassembler output.
Establish what C library code is present, ie memcpy(), strlen(), etc and name those functions.
Determine what the portion critical to your understanding is, and manually translate that into C code blocks.
