MetalMonday/me_cleaner
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Remove NR >= 2 check

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It seems that the NR value doesn't really matter, as it is equal to 0 in some
images. The presence of a particular region is tied to the condition
region_end > region_start.
This commit is contained in:
Nicola Corna 2017-05-02 17:03:44 +02:00
parent 0ac4b4bfd4
commit ba885fa9fc
1 changed files with 13 additions and 18 deletions
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31
me_cleaner.py
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@ -329,29 +329,24 @@ if __name__ == "__main__":
f.seek(0x14)
flmap0, flmap1 = unpack("<II", f.read(8))
nr = flmap0 >> 24 & 0x7
frba = flmap0 >> 12 & 0xff0
fmba = (flmap1 & 0xff) << 4
if nr >= 2:
f.seek(frba)
flreg0, flreg1, flreg2 = unpack("<III", f.read(12))
fd_start = (flreg0 & 0x1fff) << 12
fd_end = flreg0 >> 4 & 0x1fff000 | 0xfff + 1
me_start = (flreg2 & 0x1fff) << 12
me_end = flreg2 >> 4 & 0x1fff000 | 0xfff + 1
f.seek(frba)
flreg0, flreg1, flreg2 = unpack("<III", f.read(12))
fd_start = (flreg0 & 0x1fff) << 12
fd_end = flreg0 >> 4 & 0x1fff000 | 0xfff + 1
me_start = (flreg2 & 0x1fff) << 12
me_end = flreg2 >> 4 & 0x1fff000 | 0xfff + 1
if me_start >= me_end:
sys.exit("The ME/TXE region in this image has been disabled")
if me_start >= me_end:
sys.exit("The ME/TXE region in this image has been disabled")
f.seek(me_start + 0x10)
if f.read(4) != b"$FPT":
sys.exit("The ME/TXE region is corrupted or missing")
f.seek(me_start + 0x10)
if f.read(4) != b"$FPT":
sys.exit("The ME/TXE region is corrupted or missing")
print("The ME/TXE region goes from {:#x} to {:#x}"
.format(me_start, me_end))
else:
sys.exit("This image does not contains a ME/TXE firmware NR = {})"
.format(nr))
print("The ME/TXE region goes from {:#x} to {:#x}"
.format(me_start, me_end))
else:
sys.exit("Unknown image")