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[Qemu-devel] [PATCH v8 2/3] scripts/signrom.py: Check for magic in optio
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From: |
Richard W.M. Jones |
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Subject: |
[Qemu-devel] [PATCH v8 2/3] scripts/signrom.py: Check for magic in option ROMs. |
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Date: |
Wed, 11 May 2016 22:06:46 +0100 |
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 <address@hidden>
---
scripts/signrom.py | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/scripts/signrom.py b/scripts/signrom.py
index 6c8b9bf..5629bca 100644
--- a/scripts/signrom.py
+++ b/scripts/signrom.py
@@ -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)
--
2.7.4