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MdeModulePkg/BootScriptExecutorDxe: remove NX attr for FfsBuffer

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If PcdDxeNxMemoryProtectionPolicy is set to enable protection for memory
of EfiReservedMemoryType, the BIOS will hang at a page fault exception
triggered by BootScriptExecutorDxe.

The root cause is that this driver will allocate memory of
EfiReservedMemoryType and relocate itself into this new memory. Since
EfiReservedMemoryType of memory is marked non-executable, re-start this
driver after relocation will cause exception. The fix is removing the NX
attribute after memory allocation.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
This commit is contained in:
Jian J Wang
2018-01-15 10:25:40 +08:00
committed by Ruiyu Ni
parent 94c0129d24
commit 6a3094c996
3 changed files with 16 additions and 0 deletions
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MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/ScriptExecute.h
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@@ -38,6 +38,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include <Library/LockBoxLib.h>
#include <Library/CpuExceptionHandlerLib.h>
#include <Library/DevicePathLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Guid/AcpiS3Context.h>
#include <Guid/BootScriptExecutorVariable.h>