Thomas Weißschuh has uploaded this change for review.
[util/vgabios_extract] Do intial commit
This util extracts the VGA BIOS from an UEFI dump.
Depends on the 3rd party Python library uefi-firmware-parser.
(https://github.com/theopolis/uefi-firmware-parser)
Change-Id: I8f67160a0a6e9035f81f29b1675272e9c992b143
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
---
A util/vgabios_extract/vgabios_extract.py
1 file changed, 60 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/46/23046/1
diff --git a/util/vgabios_extract/vgabios_extract.py b/util/vgabios_extract/vgabios_extract.py
new file mode 100755
index 0000000..1c32b93
--- /dev/null
+++ b/util/vgabios_extract/vgabios_extract.py
@@ -0,0 +1,60 @@
+#!/usr/bin/env python2
+
+from __future__ import print_function
+
+import uefi_firmware
+
+
+def extract_vga_bios(blob):
+ volumes = uefi_firmware.search_firmware_volumes(blob)
+
+ objects = []
+
+ for v in volumes:
+ x = uefi_firmware.AutoParser(blob[v - 40:])
+
+ if x.type() == 'unknown':
+ continue
+
+ objects.extend(x.parse().objects)
+
+ while len(objects):
+ o = objects.pop()
+
+ if not o:
+ continue
+
+ subobjects = filter(lambda x: x is not None, o.objects)
+
+ if subobjects:
+ objects.extend(subobjects)
+ continue
+
+ if b'VGA Compatible BIOS' in o.content:
+ return o
+
+
+if __name__ == '__main__':
+ import argparse
+ import sys
+
+ print(sys.argv)
+
+ parser = argparse.ArgumentParser()
+ parser.add_argument('input', type=str)
+ parser.add_argument('output', type=str)
+
+ args = parser.parse_args()
+
+ with open(args.input, 'rb') as f:
+ blob = f.read()
+
+ o = extract_vga_bios(blob)
+
+ if o is not None:
+ print('Found VGA Bios in {}'.format(o.guid_label), file=sys.stderr)
+ with open(args.output, 'wb') as f:
+ f.write(o.content)
+ else:
+ print('Did not find anything')
+ sys.exit(1)
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