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authorh0t_max <h0t_max@hotmail.com>2022-07-19 00:02:21 +0200
committerh0t_max <h0t_max@hotmail.com>2022-07-19 00:02:21 +0200
commitea3381947943b8cd33f8edad41b4f32ea52af49e (patch)
tree618003ecf55c7eb7893915bf8345c05a063ee4c6 /XuUnp.py
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Diffstat (limited to 'XuUnp.py')
-rw-r--r--XuUnp.py78
1 files changed, 78 insertions, 0 deletions
diff --git a/XuUnp.py b/XuUnp.py
new file mode 100644
index 0000000..dc84408
--- /dev/null
+++ b/XuUnp.py
@@ -0,0 +1,78 @@
+import struct, sys, os, binascii
+
+class bitsReader(object):
+ def __init__(self, ab):
+ self.bits = int(binascii.hexlify(ab[::-1]), 16)
+ self.o = 0
+ def get(self, n=1):
+ self.bits, v = divmod(self.bits, 1<<n)
+ return v
+
+def decompress(ab):
+ cbUnp, = struct.unpack_from("<L", ab)
+ print(". Decompressing %d -> %d, be patient..." % (len(ab), cbUnp))
+ br = bitsReader(ab[4:])
+ r = bytearray()
+ while (br.bits):
+ flag = br.get(1)
+ if flag:
+ ncp = br.get(4)
+ if ncp < 3: ncp += 16
+ offs = br.get(14)
+ ocp = len(r) - offs
+ for i in range(ncp): r.append(r[ocp+i])
+ else:
+ r.append(br.get(8))
+ if len(r) != cbUnp: print("? Got %d instead of %d..." % (len(r), cbUnp))
+ else: print("+ Unpacked OK")
+ return bytes(r)
+
+class Elf64_Shdr(object):
+ fmt = struct.Struct("<LLQQQQLLQQ")
+ def __init__(self, ab, shoff, iSec):
+ self.sh_name, self.sh_type, self.sh_flags, self.sh_addr, self.sh_offset, self.sh_size, self.sh_link, self.sh_info, self.sh_addralign, self.sh_entsize = \
+ self.fmt.unpack_from(ab, shoff + iSec*self.fmt.size)
+
+def process(fn):
+ print("Processing %s" % fn)
+ with open(fn, "rb") as fi: ab = fi.read()
+ oELF = ab.find(b'\x7FELF\2\1\1\0')
+ if oELF < 0:
+ print("- Can't find top ELF")
+ return
+ print(". ELF at 0x%X" % oELF)
+ e_ident, e_type, e_machine, e_version, e_entry, e_phoff, e_shoff, e_flags, e_ehsize, e_phentsize, e_phnum, e_shentsize, e_shnum, e_shstrndx = \
+ struct.unpack_from("<16sHHLQQQLHHHHHH", ab, oELF)
+ names = Elf64_Shdr(ab, oELF + e_shoff, e_shstrndx)
+ oNames = oELF + names.sh_offset
+
+ nPARKING, nXURT = b".PARKING\0", b".XURT\0"
+ sPARKING, sXURT = None,None
+
+ for iSec in range(e_shnum):
+ sec = Elf64_Shdr(ab, oELF + e_shoff, iSec)
+ oN = oNames+sec.sh_name
+ if ab[oN:oN+len(nPARKING)] == nPARKING: sPARKING = sec
+ if ab[oN:oN+len(nXURT)] == nXURT: sXURT = sec
+
+ base,ext = os.path.splitext(fn)
+ if not os.path.isdir(base): os.mkdir(base)
+ with open(os.path.join(base, "topELF.bin"), "wb") as fo: fo.write(ab[oELF:])
+
+ if sPARKING:
+ print(". Parking: 0x%X+%X" % (oELF+sPARKING.sh_offset, sPARKING.sh_size))
+ with open(os.path.join(base, "Parking.bin"), "wb") as fo: fo.write(ab[oELF+sPARKING.sh_offset:oELF+sPARKING.sh_offset+sPARKING.sh_size])
+ else: print("- Can't find .PARKING")
+
+ if sXURT:
+ print(". XuRT: 0x%X+%X" % (oELF+sXURT.sh_offset, sXURT.sh_size))
+ packed = ab[oELF+sXURT.sh_offset:oELF+sXURT.sh_offset+sXURT.sh_size]
+# with open(os.path.join(base, "XuRT.sect"), "wb") as fo: fo.write(packed)
+ plain = decompress(packed)
+ with open(os.path.join(base, "XuRT.bin"), "wb") as fo: fo.write(plain)
+ else: print("- Can't find .XURT")
+
+def main(argv):
+ for fn in argv[1:]: process(fn)
+
+if __name__=="__main__": main(sys.argv)