sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

MdeModulePkg DxeIpl: Add stack NX support

Browse Source 
This feature is added for UEFI spec that says
"Stack may be marked as non-executable in identity mapped page tables".
A PCD PcdSetNxForStack is added to turn on/off this feature, and it is
FALSE by default.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: "Yao, Jiewen" <Jiewen.yao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18166 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Star Zeng
2015-08-05 12:45:21 +00:00
committed by lersek
parent edaea0e7bf
commit 5630cdfe9f
7 changed files with 392 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
MdeModulePkg/MdeModulePkg.dec
View File

@@ -960,7 +960,16 @@
## The number of bytes between registers in serial device. The default is 1 byte.
# @Prompt Serial Port Register Stride in Bytes
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterStride|1|UINT32|0x0001006d
## Indicates if to set NX for stack.<BR><BR>
# For the DxeIpl and the DxeCore are both X64, set NX for stack feature also require PcdDxeIplBuildPageTables be TRUE.<BR>
# For the DxeIpl and the DxeCore are both IA32 (PcdDxeIplSwitchToLongMode is FALSE), set NX for stack feature also require
# IA32 PAE is supported and Execute Disable Bit is available.<BR>
# TRUE - to set NX for stack.<BR>
# FALSE - Not to set NX for stack.<BR>
# @Prompt Set NX for stack.
gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|FALSE|BOOLEAN|0x0001006f
[PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
## This PCD defines the Console output row. The default value is 25 according to UEFI spec.
# This PCD could be set to 0 then console output would be at max column and max row.