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

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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scripts/signrom.py
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@ -17,7 +17,10 @@ if len(sys.argv) < 3:
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)