> v4:
> a. Change name of new data structure from CPU_EXCEPTION_INIT_DATA_EX
> to CPU_EXCEPTION_INIT_DATA
> b. Add "size" field for all "buffer" fields in CPU_EXCEPTION_INIT_DATA
> c. Add separate fields for IA32 and X64 in CPU_EXCEPTION_INIT_DATA
> v3:
> a. Change InitializeCpuExceptionStackSwitchHandlers() to
> InitializeCpuExceptionHandlersEx() to be more general.
> b. Add structure definition CPU_EXCEPTION_INIT_DATA_EX for new API
> v2:
> Add prototype definition of InitializeCpuExceptionStackSwitchHandlers()
A new API InitializeCpuExceptionHandlersEx() is introduced to support
initializing exception handlers with extra functionalities which need
extra init data, such as stack switch for Stack Guard feature.
EFI_STATUS
EFIAPI
InitializeCpuExceptionHandlersEx (
IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL,
IN CPU_EXCEPTION_INIT_DATA *InitData OPTIONAL
);
By default, this method should include all functionalities implemented by
InitializeCpuExceptionHandlers(), plus extra initialization works, if any.
This is 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 initialization of exception.
Cc: Star Zeng <star.z...@intel.com>
Cc: Eric Dong <eric.d...@intel.com>
Cc: Jiewen Yao <jiewen....@intel.com>
Suggested-by: Ayellet Wolman <ayellet.wol...@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jian J Wang <jian.j.w...@intel.com>
---
.../Include/Library/CpuExceptionHandlerLib.h | 91 ++++++++++++++++++++++
1 file changed, 91 insertions(+)
diff --git a/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
b/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
index 6cd8230127..4b7b09440e 100644
--- a/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
+++ b/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
@@ -19,6 +19,67 @@
#include <Ppi/VectorHandoffInfo.h>
#include <Protocol/Cpu.h>
+typedef union {
+ struct {
+ //
+ // The address of top of known good stack reserved for *ALL* exceptions
+ // listed in field StackSwitchExceptions.
+ //
+ UINTN KnownGoodStackTop;
+ //
+ // The size of known good stack for *ONE* exception only.
+ //
+ UINTN KnownGoodStackSize;
+ //
+ // Buffer of exception vector list for stack switch.
+ //
+ UINT8 *StackSwitchExceptions;
+ //
+ // Number of exception vectors in StackSwitchExceptions.
+ //
+ UINTN StackSwitchExceptionNumber;
+ //
+ // Buffer of IDT table. It must be type of IA32_IDT_GATE_DESCRIPTOR.
+ // Normally there's no need to change IDT table size.
+ //
+ VOID *IdtTable;
+ //
+ // Size of buffer for IdtTable.
+ //
+ UINTN IdtTableSize;
+ //
+ // Buffer of GDT table. It must be type of IA32_SEGMENT_DESCRIPTOR.
+ //
+ VOID *GdtTable;
+ //
+ // Size of buffer for GdtTable.
+ //
+ UINTN GdtTableSize;
+ //
+ // Pointer to start address of descriptor of exception task gate in the
+ // GDT table. It must be type of IA32_TSS_DESCRIPTOR.
+ //
+ VOID *ExceptionTssDesc;
+ //
+ // Size of buffer for ExceptionTssDesc.
+ //
+ UINTN ExceptionTssDescSize;
+ //
+ // Buffer of task-state segment for exceptions. It must be type of
+ // IA32_TASK_STATE_SEGMENT.
+ //
+ VOID *ExceptionTss;
+ //
+ // Size of buffer for ExceptionTss.
+ //
+ UINTN ExceptionTssSize;
+ //
+ // Flag to indicate if default handlers should be initialized or not.
+ //
+ BOOLEAN InitDefaultHandlers;
+ } Ia32, X64;
+} CPU_EXCEPTION_INIT_DATA;
+
/**
Initializes all CPU exceptions entries and provides the default exception
handlers.
@@ -41,6 +102,36 @@ InitializeCpuExceptionHandlers (
IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
);
+/**
+ 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.
+ @retval EFI_UNSUPPORTED This function is not supported.
+
+**/
+EFI_STATUS
+EFIAPI
+InitializeCpuExceptionHandlersEx (
+ IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL,
+ IN CPU_EXCEPTION_INIT_DATA *InitData OPTIONAL
+ );
+
/**
Initializes all CPU interrupt/exceptions entries and provides the default
interrupt/exception handlers.
--
2.15.1.windows.2
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