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BaseTools/FMMT: Fix errors when operating the FV with CRC32 section

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Currently the FMMT tool supports CRC32 GUID section (Ref. GuidTools.py).
But it is found that there are errors for the FV with CRC32 section.
For example, the errors are checked on the following commands.

--v : Show FV information except for the FV
--a : Show "Target Fv not found!!!" when adding an FFS file to the FV
--d : Show "Target Ffs not found!!!" when deleting an FFS file in the FV

They are caused by the mismatch for CRC32 section data between the FMMT
and GenCrc32 tools. The FMMT tool returns CRC32 section data without CRC
checksum field (4 bytes). The GenCrc32 tool (with -d option, verify CRC32
value for the input file) requires CRC32 section data including CRC
checksum field (4 bytes).

Fix the issue through adjusting the section data to include CRC checksum
field. Currently DataOffset field for CRC32 GUID section is reported as
0x1C differently (GUID Section header length: 0x18 + Checksum field: 0x4).
Instead of DataOffset field that includes CRC checksum field, configure
the section data based on the offset from section header length (0x18)
that was previously calculated. This update enables GUID sections to use
the same offset consistently.

Signed-off-by: Phil Noh <Phil.Noh@amd.com>
This commit is contained in:
Phil Noh
2025-09-23 21:54:54 -05:00
committed by mergify[bot]
parent c9eb3717b4
commit 1e7a83cbb6
1 changed files with 1 additions and 6 deletions
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7
BaseTools/Source/Python/FMMT/core/BinaryFactoryProduct.py
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@ -2,6 +2,7 @@
# This file is used to implement of the various bianry parser.
#
# Copyright (c) 2021-, Intel Corporation. All rights reserved.<BR>
# Copyright (C) 2025 Advanced Micro Devices, Inc. All rights reserved.<BR>
# SPDX-License-Identifier: BSD-2-Clause-Patent
##
import copy
@ -136,9 +137,6 @@ class SectionProduct(BinaryProduct):
if (Rel_Offset+Section_Info.HeaderLength+len(Section_Info.Data) != Data_Size):
Pad_Size = GetPadSize(Section_Info.Size, SECTION_COMMON_ALIGNMENT)
Section_Info.PadData = Pad_Size * b'\x00'
if Section_Info.Header.Type == 0x02:
Section_Info.DOffset = Section_Offset + Section_Info.ExtHeader.DataOffset + Rel_Whole_Offset
Section_Info.Data = Whole_Data[Rel_Offset+Section_Info.ExtHeader.DataOffset: Rel_Offset+Section_Info.Size]
if Section_Info.Header.Type == 0x14:
ParTree.Data.Version = Section_Info.ExtHeader.GetVersionString()
if Section_Info.Header.Type == 0x15:
@ -179,9 +177,6 @@ class FfsProduct(BinaryProduct):
if (Rel_Offset+Section_Info.HeaderLength+len(Section_Info.Data) != Data_Size):
Pad_Size = GetPadSize(Section_Info.Size, SECTION_COMMON_ALIGNMENT)
Section_Info.PadData = Pad_Size * b'\x00'
if Section_Info.Header.Type == 0x02:
Section_Info.DOffset = Section_Offset + Section_Info.ExtHeader.DataOffset + Rel_Whole_Offset
Section_Info.Data = Whole_Data[Rel_Offset+Section_Info.ExtHeader.DataOffset: Rel_Offset+Section_Info.Size]
# If Section is Version or UI type, it saves the version and UI info of its parent Ffs.
if Section_Info.Header.Type == 0x14:
ParTree.Data.Version = Section_Info.ExtHeader.GetVersionString()