MH6111 Disassembler

Disassembler for the Mitsubishi MH6111/Toshiba TMP76C75T.

Objectives

• Disassemble DSM ECU E931 binary that was assembled from the commented source
• Make a bit perfect binary from the disassembly
• Disasseble N/A ECU binary using symbol file by working through step by step against E931 commented source
• Make a bit perfect binary from the disassembly

-[ ] Disassemble MH6211 code -[ ] Disassemble MH6211 code (See branches)

Compile

cc -largp -o 7675Disassm ecuBinDisasm.c

Usage

Usage: 7675Disassm [OPTION...] <BINARY FILE> [SYMBOL FILE]
Disassembler for the MH6111/TMP76C75T(7675)

  -l, --linenumbers          Print line numbers
  -r, --rawbytes             Print raw bytes
  -?, --help                 Give this help list
      --usage                Give a short usage message
  -V, --version              Print program version

Report bugs to <[email protected]>

Execute

./7675Disassm standard_E932_E931_source.obj e931.sym

Docs

• https://app.gitbook.com/@janehacker1/s/dsm-ecu/disassembly-from-scratch/things-you-need

Symbol files

• Format: TYPE\tBYTES\t\t[LABEL]
  • eg.: code E4A1 ecuInit

Types

• reg
  • for registers, but only for the sym file, syn: code
• code
  • process as code, line starting at address BYTES, with LABEL
• data
  • process as data, line starting at address BYTES, with LABEL
• vector
  • vector table, line starting at address BYTES, with LABEL
• org
  • origin (location counter)
• skip
  • do not generate labels for address BYTES

Comments

• Lines starting with a semi-colon (;) are ignored

About

This code was, let's be honest, hacked together simply to rip apart a binary and compare it to commented code (E931) and even produce a "usable" binary from it. Beyond that who knows how it may act.

Oh, and "usable" means bit-perfect to the original and NOT useable in an ECU in a running car. Especially if it is used to modify the code!

This is just a toy to learn.