Kaitair structure definition for serialized IBM i (AS/400) *PGM objects.
Download and install Kaitai Struct Compiler:
Compile the structure to Python (or whatever language you prefer from Kaitai):
ksc -t python pgm.ksy
Now pgm.py is generated, you can use it like this:
from pgm import Pgm
pgm = Pgm.from_file("MIMAKPTR.pgm")
print(hex(pgm.pgm_header.program_header.trcbck_loc_ptr))Kaitai Struct's JS compiler can't handle values over 53 bits, that basically screws up all pointer resolution for us.
In the latest KSY addresses we have a custom addr type, that exposes a 3-byte offset to be used when resolved as
pointers to work around this problem.
Since the most mature IDE's rely on JS, we have to fall back to less sophisticated solutions:
- The Hobbits hexeditor kind of works, but breaks after certain depth. Also, coloring is often inaccurate.
- ksv works, but doesn't synchronize from the hex editor to the structure tree:
docker run -v "$(pwd):/share" -it kaitai/ksv MIMAKPTR.pgm pgm.ksy(files should be in CWD!) - A dump script is included that helps identifying what structure a particular address corresponds to (grep, less, ...)