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| author | Wang, Jian J <jian.j.wang@intel.com> | 2017-08-26 09:08:10 +0800 |
|---|---|---|
| committer | Eric Dong <eric.dong@intel.com> | 2017-10-11 16:39:00 +0800 |
| commit | f7e077768fe47075130bfa774c88c331d2ad54ff (patch) | |
| tree | bb49893cba369c49a7538f810ea5e7f9f0ee76c9 /MdeModulePkg/MdeModulePkg.uni | |
| parent | 92d07e48907f54a0da01663f3e876782a76b1e18 (diff) | |
| download | edk2-f7e077768fe47075130bfa774c88c331d2ad54ff.tar.gz edk2-f7e077768fe47075130bfa774c88c331d2ad54ff.tar.bz2 edk2-f7e077768fe47075130bfa774c88c331d2ad54ff.zip | |
MdeModulePkg/MdeModulePkg.dec,.uni: Add NULL pointer detection PCD
PCD PcdNullPointerDetectionPropertyMask is a bitmask used to control the
NULL address detection functionality in code for different phases.
If enabled, accessing NULL address in UEFI or SMM code can be caught
as a page fault exception.
BIT0 - Enable NULL pointer detection for UEFI.
BIT1 - Enable NULL pointer detection for SMM.
BIT2..6 - Reserved for future uses.
BIT7 - Disable NULL pointer detection just after EndOfDxe. This is a
workaround for those unsolvable NULL access issues in
OptionROM, boot loader, etc. It can also help to avoid
unnecessary exception caused by legacy memory (0-4095) access
after EndOfDxe, such as Windows 7 boot on Qemu.
Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Ayellet Wolman <ayellet.wolman@intel.com>
Suggested-by: Ayellet Wolman <ayellet.wolman@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>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Diffstat (limited to 'MdeModulePkg/MdeModulePkg.uni')
| -rw-r--r-- | MdeModulePkg/MdeModulePkg.uni | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/MdeModulePkg/MdeModulePkg.uni b/MdeModulePkg/MdeModulePkg.uni index d6015de75f..f8b31694ba 100644 --- a/MdeModulePkg/MdeModulePkg.uni +++ b/MdeModulePkg/MdeModulePkg.uni @@ -1127,3 +1127,16 @@ "enabled on AMD processors supporting the Secure Encrypted Virtualization (SEV) feature.\n"
"This mask should be applied when creating 1:1 virtual to physical mapping tables."
+#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdNullPointerDetectionPropertyMask_PROMPT #language en-US "Enable NULL pointer detection"
+
+#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdNullPointerDetectionPropertyMask_HELP #language en-US "Mask to control the NULL address detection in code for different phases.\n"
+ " If enabled, accessing NULL address in UEFI or SMM code can be caught.\n\n"
+ " BIT0 - Enable NULL pointer detection for UEFI.\n"
+ " BIT1 - Enable NULL pointer detection for SMM.\n"
+ " BIT2..6 - Reserved for future uses.\n"
+ " BIT7 - Disable NULL pointer detection just after EndOfDxe."
+ " This is a workaround for those unsolvable NULL access issues in"
+ " OptionROM, boot loader, etc. It can also help to avoid unnecessary"
+ " exception caused by legacy memory (0-4095) access after EndOfDxe,"
+ " such as Windows 7 boot on Qemu.\n"
+
|