MdePkg: Introduced BaseStackCheckLib (cont.)

Liming proposed different changes compare to the latest patch.
This commit ensures the changes goes in his direction.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Andrew Fish <afish@apple.com>
Signed-off-by: Olivier Martin <olivier.martin@arm.com
Reviewed-by: Gao, Liming <liming.gao@intel.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15866 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/BaseStackCheckLib/BaseStackCheckGcc.c

@@ -23,7 +23,7 @@
 #include <Library/PcdLib.h>
 
 /// "canary" value that is inserted by the compiler into the stack frame.
-VOID *__stack_chk_guard = (VOID*)FixedPcdGet64 (PcdBaseStackCanary);
+VOID *__stack_chk_guard = (VOID*)0x0AFF;
 
 // If ASLR was enabled we could use
 //void (*__stack_chk_guard)(void) = __stack_chk_fail;

MdePkg/Library/BaseStackCheckLib/BaseStackCheckLib.inf

@@ -38,5 +38,4 @@
   DebugLib
 
 [FixedPcd]
-  gEfiMdePkgTokenSpaceGuid.PcdBaseStackCanary
   gEfiMdePkgTokenSpaceGuid.PcdDebugPropertyMask

MdePkg/MdePkg.dec

@@ -1553,10 +1553,6 @@
   #  The required memory space is decided by the value of PcdMaximumGuidedExtractHandler.
   gEfiMdePkgTokenSpaceGuid.PcdGuidedExtractHandlerTableAddress|0x1000000|UINT64|0x30001015
 
-  ## Canary value for the stack overflow protection. This PCD can be used by a firmware vendor
-  # or for debugging purposes to change the recommended value.
-  gEfiMdePkgTokenSpaceGuid.PcdBaseStackCanary|0x0AFF|UINT64|0x0000002A
-
 [PcdsFixedAtBuild.IPF]
   ## The base address of IO port space for IA64 arch
   gEfiMdePkgTokenSpaceGuid.PcdIoBlockBaseAddressForIpf|0x0ffffc000000|UINT64|0x0000000f

MdePkg/MdePkg.dsc

@@ -169,3 +169,6 @@
   
 [Components.EBC]
   MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf
+
+[Components.ARM, Components.AARCH64]
+  MdePkg/Library/BaseStackCheckLib/BaseStackCheckLib.inf