ArmPkg/ArmExceptionLib: Add implementation of new API

This patch add implementation of following new API introduced into
CpuExceptionHandlerLib. Since this lib hasn't support Stack Guard
and stack switch, the new method just calls original
InitializeCpuExceptionHandlers.

  EFI_STATUS
  EFIAPI
  InitializeCpuExceptionHandlersEx (
    IN EFI_VECTOR_HANDOFF_INFO            *VectorInfo OPTIONAL,
    IN CPU_EXCEPTION_INIT_DATA            *InitDataEx OPTIONAL
    );

Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jiewen Yao <jiewen.yao@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: Jeff Fan <vanjeff_919@hotmail.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/ArmPkg/Library/ArmExceptionLib/ArmExceptionLib.c b/ArmPkg/Library/ArmExceptionLib/ArmExceptionLib.c
index e8ea1f1..cebb26a 100644
--- a/ArmPkg/Library/ArmExceptionLib/ArmExceptionLib.c
+++ b/ArmPkg/Library/ArmExceptionLib/ArmExceptionLib.c
@@ -320,3 +320,36 @@ CommonCExceptionHandler(
 

   DefaultExceptionHandler(ExceptionType, SystemContext);

 }

+

+/**

+  Initializes all CPU exceptions entries with optional extra initializations.

+

+  By default, this method should include all functionalities implemented by

+  InitializeCpuExceptionHandlers(), plus extra initialization works, if any.

+  This could be done by calling InitializeCpuExceptionHandlers() directly

+  in this method besides the extra works.

+

+  InitData is optional and its use and content are processor arch dependent.

+  The typical usage of it is to convey resources which have to be reserved

+  elsewhere and are necessary for the extra initializations of exception.

+

+  @param[in]  VectorInfo    Pointer to reserved vector list.

+  @param[in]  InitData      Pointer to data optional for extra initializations

+                            of exception.

+

+  @retval EFI_SUCCESS             The exceptions have been successfully

+                                  initialized.

+  @retval EFI_INVALID_PARAMETER   VectorInfo or InitData contains invalid

+                                  content.

+

+**/

+EFI_STATUS

+EFIAPI

+InitializeCpuExceptionHandlersEx (

+  IN EFI_VECTOR_HANDOFF_INFO            *VectorInfo OPTIONAL,

+  IN CPU_EXCEPTION_INIT_DATA            *InitData OPTIONAL

+  )

+{

+  return InitializeCpuExceptionHandlers (VectorInfo);

+}

+