JEFF file format tools
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.

This script allows you to dump the JEFF files used by Intel ME's DAL (Dynamic Application Loader). It supports the following input formats:

  • raw JEFF file ('JEFF signature')
  • JEFF packaged as an ME applet with signed manifest header ($MN2 magic) (currently ME 8-9.5 only)
  • any binary containing an uncompressed JEFF file inside (e.g. JOM_mod.bin produced by unpacking an ME firmware)

Usage: [options] file.jeff >output.txt
Where options are:
-d: dump JEFF structure (default).
This dumps the detailed structure of the JEFF file, including classes, fields and methods with disassembly. For the description of the JEFF format and instructions, see the JEFF standard documens in the docs/ directory.
-s: print class definition summary.
Prints only a list of classes, fields (with offsets) and methods
-j: print Jasmin-style disassembly (experimental)
Prints the JEFF file as a Jasmin-style Java assembly (jeff instructions are transformed into equivalent Java ones). The result can be directly assembled using Krakatau into .class files (and then decompiled).

This script unpacks DAL applets from a .dalp file (such files are used by Intel to package several ME applets into one XML).