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scripts/signrom.py: Check for magic in option ROMs.

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Because of the risk that compilers might not emit the asm() block at
the beginning of the option ROM, check that the ROM contains the
required magic signature.

Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
Message-Id: <1463000807-18015-3-git-send-email-rjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Richard W.M. Jones 2016-05-11 22:06:46 +01:00 committed by Paolo Bonzini
parent 6f71b779c8
commit fd28938b7a
1 changed files with 4 additions and 1 deletions
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5
scripts/signrom.py
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@ -17,7 +17,10 @@
fin = open(sys.argv[1], 'rb')
fout = open(sys.argv[2], 'wb')
fin.seek(2)
magic = fin.read(2)
if magic != '\x55\xaa':
sys.exit("%s: option ROM does not begin with magic 55 aa" % sys.argv[1])
size_byte = ord(fin.read(1))
fin.seek(0)