Tianocore/edk2.git/MdeModulePkg/Core/PiSmmCore/Page.c, branch master

MdeModulePkg/Core/PiSmmCore/Page.c: Correct gMemoryMap typo

2026-01-28T14:03:18+00:00

Correct function comment, gMemoryMep should be gMemoryMap. Signed-off-by: Damien Chen

MdeModulePkg: Fix missing NULL tests.

2025-11-22T18:58:47+00:00

https://github.com/github/codeql/blob/codeql-cli-2.7.3/cpp/ql/src/Critical/MissingNullTest.qhelp For items which allocate memory, or get a pointer from another structure, it is important to validate that the pointers are not null before they are dereferenced. Signed-off-by: Aaron Pop

MdeModulePkg: Apply uncrustify changes

2021-12-07T17:24:28+00:00

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the MdeModulePkg package Cc: Andrew Fish Cc: Leif Lindholm Cc: Michael D Kinney Signed-off-by: Michael Kubacki Reviewed-by: Liming Gao

MdeModulePkg/Core/PiSmmCore: Fix various typos

2020-02-10T22:30:07+00:00

Fix various typos in comments and documentation. Cc: Jian J Wang Cc: Hao A Wu Signed-off-by: Antoine Coeur Reviewed-by: Philippe Mathieu-Daude Reviewed-by: Hao A Wu Signed-off-by: Philippe Mathieu-Daude Message-Id: <20200207010831.9046-18-philmd@redhat.com>

MdeModulePkg: Replace BSD License with BSD+Patent License

2019-04-09T17:58:08+00:00

https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney Reviewed-by: Hao Wu Reviewed-by: Jian J Wang

MdeModulePkg/PiSmmCore: Check valid memory range.

2018-08-28T02:24:25+00:00

Call BS.AllocatePages in DXE driver and call SMM FreePages with the address of the buffer allocated in the DXE driver. SMM FreePages success and add a non-SMRAM range into SMM heap list. This is not an expected behavior. SMM FreePages should return error for this case and not free the pages. BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1098 Change-Id: Ie5ffa1ac62c558aa418a8a3d7d0e8158b846e13b Cc: Star Zeng Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Eric Dong Reviewed-by: Star Zeng

MdeModulePkg PiSmmCore: Remove redundant functions

2018-08-21T08:29:04+00:00

The functions that are never called have been removed. They are IsImageInsideSmram,FindImageRecord,SmmRemoveImageRecord, SmmMemoryAttributesTableConsistencyCheck,DumpSmmMemoryMapEntry, SmmMemoryMapConsistencyCheckRange,SmmMemoryMapConsistencyCheck, DumpSmmMemoryMap,ClearGuardMapBit,SetGuardMapBit,AdjustMemoryA, AdjustMemoryS,IsHeadGuard and IsTailGuard. FindImageRecord() is called by SmmRemoveImageRecord(); however, nothing calls SmmRemoveImageRecord(). SmmMemoryMapConsistencyCheckRange() is called by SmmMemoryMapConsistencyCheck(); however, nothing calls SmmMemoryMapConsistencyCheck(). https://bugzilla.tianocore.org/show_bug.cgi?id=1062 v2:append the following to the commit message. - FindImageRecord() is called by SmmRemoveImageRecord(); however, nothing calls SmmRemoveImageRecord(). - SmmMemoryMapConsistencyCheckRange() is called by SmmMemoryMapConsistencyCheck(); however, nothing calls SmmMemoryMapConsistencyCheck(). Cc: Star Zeng Cc: Eric Dong Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: shenglei Reviewed-by: Jian J Wang Reviewed-by: Laszlo Ersek Reviewed-by: Star Zeng

MdeModulePkg PiSmmCore: Set ForwardLink to NULL in RemoveOldEntry()

2018-01-31T09:23:36+00:00

"Entry->Link.ForwardLink = NULL;" is present in RemoveMemoryMapEntry() for DxeCore, that is correct. "Entry->Link.ForwardLink = NULL;" is absent in RemoveOldEntry() for PiSmmCore, that is incorrect. Without this fix, when FromStack in Entry is TRUE, the "InsertTailList (&mMapStack[mMapDepth].Link, &Entry->Link);" in following calling to CoreFreeMemoryMapStack() will fail as the entry at mMapStack[mMapDepth] actually has been removed from the list. Cc: Jiewen Yao Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Star Zeng Reviewed-by: Jiewen Yao

MdeModulePkg: Fix unix style of EOL

2017-11-21T12:24:37+00:00

Cc: Wu Hao Cc: Star Zeng Cc: Eric Dong Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Jian J Wang Reviewed-by: Hao Wu

MdeModulePkg/PiSmmCore: Implement heap guard feature for SMM mode

2017-11-17T03:03:19+00:00

This feature makes use of paging mechanism to add a hidden (not present) page just before and after the allocated memory block. If the code tries to access memory outside of the allocated part, page fault exception will be triggered. This feature is controlled by three PCDs: gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPropertyMask gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPoolType gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPageType BIT2 and BIT3 of PcdHeapGuardPropertyMask can be used to enable or disable memory guard for SMM page and pool respectively. PcdHeapGuardPoolType and/or PcdHeapGuardPageType are used to enable or disable guard for specific type of memory. For example, we can turn on guard only for EfiRuntimeServicesCode and EfiRuntimeServicesData by setting the PCD with value 0x60. Pool memory is not ususally integer multiple of one page, and is more likely less than a page. There's no way to monitor the overflow at both top and bottom of pool memory. BIT7 of PcdHeapGuardPropertyMask is used to control how to position the head of pool memory so that it's easier to catch memory overflow in memory growing direction or in decreasing direction. Cc: Eric Dong Cc: Jiewen Yao Cc: Laszlo Ersek Cc: Ruiyu Ni Suggested-by: Ayellet Wolman Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Jian J Wang Reviewed-by: Jiewen Yao Regression-tested-by: Laszlo Ersek