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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 <janehacker1@gmail.com>

Execute

./7675Disassm standard_E932_E931_source.obj e931.sym

Docs

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.