diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2015-10-08 18:52:25 +0000 |
|---|---|---|
| committer | abiesheuvel <abiesheuvel@Edk2> | 2015-10-08 18:52:25 +0000 |
| commit | c82b808749f3bc8b54bfc8f53de0c69793437d76 (patch) | |
| tree | 2ae37b9795dbf2977ada7729ee4c8c4a1f18e715 /MdeModulePkg | |
| parent | 4d9a4f62cfc8d04f822edb8f3467ba2de45a16de (diff) | |
| download | edk2-platforms-c82b808749f3bc8b54bfc8f53de0c69793437d76.tar.xz | |
MdeModulePkg/DxeIplPeim: implement non-exec stack for ARM/AARCH64
Mark the DXE stack region as non-executable right before handing
off to the DXE core, by invoking the appropriate ArmLib function.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Feng Tian <Feng.Tian@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18588 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg')
| -rw-r--r-- | MdeModulePkg/Core/DxeIplPeim/Arm/DxeLoadFunc.c | 7 | ||||
| -rw-r--r-- | MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf | 8 |
2 files changed, 15 insertions, 0 deletions
diff --git a/MdeModulePkg/Core/DxeIplPeim/Arm/DxeLoadFunc.c b/MdeModulePkg/Core/DxeIplPeim/Arm/DxeLoadFunc.c index df2dc70b17..d6581a3125 100644 --- a/MdeModulePkg/Core/DxeIplPeim/Arm/DxeLoadFunc.c +++ b/MdeModulePkg/Core/DxeIplPeim/Arm/DxeLoadFunc.c @@ -16,6 +16,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #include "DxeIpl.h"
+#include <Library/ArmLib.h>
+
/**
Transfers control to DxeCore.
@@ -43,6 +45,11 @@ HandOffToDxeCore ( BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));
ASSERT (BaseOfStack != NULL);
+ if (PcdGetBool (PcdSetNxForStack)) {
+ Status = ArmSetMemoryRegionNoExec ((UINTN)BaseOfStack, STACK_SIZE);
+ ASSERT_EFI_ERROR (Status);
+ }
+
//
// Compute the top of the stack we were allocated. Pre-allocate a UINTN
// for safety.
diff --git a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf index 66c58b1d0f..04ad928c9f 100644 --- a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf +++ b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf @@ -61,6 +61,9 @@ MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
+[Packages.ARM, Packages.AARCH64]
+ ArmPkg/ArmPkg.dec
+
[LibraryClasses]
PcdLib
MemoryAllocationLib
@@ -76,6 +79,9 @@ DebugAgentLib
PeiServicesTablePointerLib
+[LibraryClasses.ARM, LibraryClasses.AARCH64]
+ ArmLib
+
[Ppis]
gEfiDxeIplPpiGuid ## PRODUCES
gEfiPeiDecompressPpiGuid ## PRODUCES
@@ -104,6 +110,8 @@ [Pcd.IA32,Pcd.X64]
gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable ## SOMETIMES_CONSUMES
+
+[Pcd.IA32,Pcd.X64,Pcd.ARM,Pcd.AARCH64]
gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack ## SOMETIMES_CONSUMES
[Depex]
|