extract_pcff.py

import struct
import os

global_offset = 0x130

files = []

def read_string(fin, offset):
    out= ""
    now = fin.tell()

    fin.seek(offset, 0)

    while True:
        ch = fin.read(1)
        if len(ch) == 0 or ch[0] == 0:
            break
        out += chr(ch[0])

    fin.seek(now, 0)
    return out

with open("pcff.elf", "rb") as fin:

    fin.seek(global_offset, 0)

    while True:
        fd = fin.read(12)
        if not len(fd) == 12:
            break

        f = {}
        f['name'], f['off'], f['size'] = struct.unpack("<III", fd)

        if f['name'] == 0 or f['off'] == 0:
            break

        f['name'] -= 0x8b000000
        f['off'] -= 0x8b000000

        files.append(f)

    for f in files:
        fin.seek(global_offset + f['off'])
        fdata = fin.read(f['size'])
        if not len(fdata) == f['size']:
            print("bad", len(fdata), f['size'])
            continue

        name = read_string(fin, global_offset + f['name'])
        print (name)
        outdir = "out" + os.path.dirname(name)
        os.makedirs(outdir, 0o0777, True)

        with open("out" + name, "wb") as fout:
            fout.write(fdata)