MdeModulePkg/RegularExpressionDxe:omit unused variable

[mirror_edk2.git] / MdeModulePkg / MdeModulePkg.dec

diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 74a699cbb7f74f0dcac9bca2b5842963a5f9e246..6037504fa789d4ca96d45bf3a776dd77bc17a909 100644 (file)
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -1288,17 +1288,23 @@
   ## Set image protection policy. The policy is bitwise.\r
   #  If a bit is set, the image will be protected by DxeCore if it is aligned.\r
   #   The code section becomes read-only, and the data section becomes non-executable.\r
-  #  If a bit is clear, the image will not be protected.<BR><BR>\r
+  #  If a bit is clear, nothing will be done to image code/data sections.<BR><BR>\r
   #    BIT0       - Image from unknown device. <BR>\r
   #    BIT1       - Image from firmware volume.<BR>\r
+  #  <BR>\r
+  #  Note: If a bit is cleared, the data section could be still non-executable if\r
+  #  PcdDxeNxMemoryProtectionPolicy is enabled for EfiLoaderData, EfiBootServicesData\r
+  #  and/or EfiRuntimeServicesData.<BR>\r
+  #  <BR>\r
   # @Prompt Set image protection policy.\r
   # @ValidRange 0x80000002 | 0x00000000 - 0x0000001F\r
   gEfiMdeModulePkgTokenSpaceGuid.PcdImageProtectionPolicy|0x00000002|UINT32|0x00001047\r
 \r
   ## Set DXE memory protection policy. The policy is bitwise.\r
   #  If a bit is set, memory regions of the associated type will be mapped\r
-  #  non-executable.<BR><BR>\r
-  #\r
+  #  non-executable.<BR>\r
+  #  If a bit is cleared, nothing will be done to associated type of memory.<BR>\r
+  #  <BR>\r
   # Below is bit mask for this PCD: (Order is same as UEFI spec)<BR>\r
   #  EfiReservedMemoryType          0x0001<BR>\r
   #  EfiLoaderCode                  0x0002<BR>\r
@@ -1890,8 +1896,13 @@
   #  For the DxeIpl and the DxeCore are both X64, set NX for stack feature also require PcdDxeIplBuildPageTables be TRUE.<BR>\r
   #  For the DxeIpl and the DxeCore are both IA32 (PcdDxeIplSwitchToLongMode is FALSE), set NX for stack feature also require\r
   #  IA32 PAE is supported and Execute Disable Bit is available.<BR>\r
-  #   TRUE  - to set NX for stack.<BR>\r
-  #   FALSE - Not to set NX for stack.<BR>\r
+  #  <BR>\r
+  #   TRUE  - Set NX for stack.<BR>\r
+  #   FALSE - Do nothing for stack.<BR>\r
+  #  <BR>\r
+  #  Note: If this PCD is set to FALSE, NX could be still applied to stack due to PcdDxeNxMemoryProtectionPolicy enabled for\r
+  #  EfiBootServicesData.<BR>\r
+  #  <BR>\r
   # @Prompt Set NX for stack.\r
   gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|FALSE|BOOLEAN|0x0001006f\r
 \r