[coreboot-gerrit] Change in coreboot[master]: Extract the VGA BIOS from an UEFI dump
Thomas Weißschuh (Code Review)
gerrit at coreboot.org
Sat Dec 30 14:44:06 CET 2017
Thomas Weißschuh has uploaded this change for review. ( https://review.coreboot.org/23045
Change subject: Extract the VGA BIOS from an UEFI dump
......................................................................
Extract 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: Ic95b7520c65062e2106f7bd7d39bb652d4cecd7a
Signed-off-by: Thomas Weißschuh <thomas at t-8ch.de>
---
M src/arch/x86/Makefile.inc
M src/device/Kconfig
A util/vgabios_extract/vgabios_extract.py
3 files changed, 90 insertions(+), 3 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/45/23045/1
diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index cc227b3..3f2f1e4 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -38,9 +38,24 @@
$(NVRAMTOOL) -y $(top)/src/mainboard/$(MAINBOARDDIR)/cmos.layout -H $@
endif # CONFIG_HAVE_OPTION_TABLE
+vgabios-rom=$(obj)/vgabios.rom
+
+ifeq ($(CONFIG_VGA_BIOS_EXTRACT),y)
+
+$(vgabios-rom): $(call strip_quotes,$(CONFIG_VGA_BIOS_EXTRACT_FILE))
+ @printf " VGA_BIOS_EXTRACT $(CONFIG_VGA_BIOS_EXTRACT_FILE) $(vgabios-rom)\n"
+ util/vgabios_extract/vgabios_extract.py $(CONFIG_VGA_BIOS_EXTRACT_FILE) $(vgabios-rom)
+
+else
+
+$(vgabios-rom): $(call strip_quotes,$(CONFIG_VGA_BIOS_FILE))
+ $(CP) $(vgabios-rom) $(CONFIG_VGA_BIOS_FILE)
+
+endif
+
stripped_vgabios_id = $(call strip_quotes,$(CONFIG_VGA_BIOS_ID))
cbfs-files-$(CONFIG_VGA_BIOS) += pci$(stripped_vgabios_id).rom
-pci$(stripped_vgabios_id).rom-file := $(call strip_quotes,$(CONFIG_VGA_BIOS_FILE))
+pci$(stripped_vgabios_id).rom-file := $(vgabios-rom)
pci$(stripped_vgabios_id).rom-type := optionrom
cbfs-files-$(CONFIG_INTEL_MBI) += mbi.bin
diff --git a/src/device/Kconfig b/src/device/Kconfig
index 28298d5..a6b1168 100644
--- a/src/device/Kconfig
+++ b/src/device/Kconfig
@@ -566,11 +566,23 @@
like to add to your ROM.
You will be able to specify the location and file name of the
- image later.
+ false
+
+config VGA_BIOS_EXTRACT
+ bool "Extract VGA BIOS from BIOS image"
+ depends on VGA_BIOS
+ default n
+
+config VGA_BIOS_EXTRACT_FILE
+ string "VGA BIOS extract path and filename"
+ depends on VGA_BIOS_EXTRACT
+ default "3rdpart/blobs/mainboard/$(MAINBOARDDIR)/bios.bin"
+ help
+ The path and filename of the file to extract the VGA BIOS from.
config VGA_BIOS_FILE
string "VGA BIOS path and filename"
- depends on VGA_BIOS
+ depends on VGA_BIOS && !VGA_BIOS_EXTRACT
default "vgabios.bin"
help
The path and filename of the file to use as VGA BIOS.
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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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ic95b7520c65062e2106f7bd7d39bb652d4cecd7a
Gerrit-Change-Number: 23045
Gerrit-PatchSet: 1
Gerrit-Owner: Thomas Weißschuh <thomas at t-8ch.de>
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