Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: a933771361883455245d42e8c77fe7a0ed7eb083
https://github.com/tianocore/edk2/commit/a933771361883455245d42e8c77fe7a0ed7eb083
Author: Jared Pan <[email protected]>
Date: 2026-07-21 (Tue, 21 Jul 2026)
Changed paths:
M UefiPayloadPkg/Library/DxeHobLib/DxeHobLib.inf
M UefiPayloadPkg/Library/DxeHobLib/HobLib.c
Log Message:
-----------
UefiPayloadPkg/DxeHobLib: Add lazy initialization for gHobList
This change adds dynamic initialization of gHobList in GetHobList() to handle
cases where library constructors are executed before DxeHobListLibConstructor.
Issue:
On ARM platforms using ArmMmuBaseLib, the ArmMmuBaseLibConstructor calls
GetFirstGuidHob() before xeHobListLibConstructor has initialized gHobList,
causing an ASSERT.
Root Cause:
ArmMmuBaseLib's constructor uses HobLib functions, but UefiPayloadPkg's
DxeHobLib assumes gHobList is already initialized by DxeHobListLib's
constructor.
Solution:
Add the same lazy initialization pattern already used in
MdePkg/Library/DxeHobLib, which dynamically retrieves the HOB list from the
System Configuration Table if gHobList is NULL.
This change:
- Aligns behavior with MdePkg/Library/DxeHobLib
- Has no impact on existing functionality
- Improves robustness for ARM platforms
Signed-off-by: Jared Pan <[email protected]>
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