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/** @file
Common header file for CPU Exception Handler Library.
Copyright (c) 2012 - 2017, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _CPU_EXCEPTION_COMMON_H_
#define _CPU_EXCEPTION_COMMON_H_
#include <Ppi/VectorHandoffInfo.h>
#include <Protocol/Cpu.h>
#include <Library/BaseLib.h>
#include <Library/SerialPortLib.h>
#include <Library/PrintLib.h>
#include <Library/LocalApicLib.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/SynchronizationLib.h>
#include <Library/CpuExceptionHandlerLib.h>
#define CPU_EXCEPTION_NUM 32
#define CPU_INTERRUPT_NUM 256
#define HOOKAFTER_STUB_SIZE 16
//
// Exception Error Code of Page-Fault Exception
//
#define IA32_PF_EC_P BIT0
#define IA32_PF_EC_WR BIT1
#define IA32_PF_EC_US BIT2
#define IA32_PF_EC_RSVD BIT3
#define IA32_PF_EC_ID BIT4
#define IA32_PF_EC_PK BIT5
#define IA32_PF_EC_SGX BIT15
#include "ArchInterruptDefs.h"
#define CPU_EXCEPTION_HANDLER_LIB_HOB_GUID \
{ \
0xb21d9148, 0x9211, 0x4d8f, { 0xad, 0xd3, 0x66, 0xb1, 0x89, 0xc9, 0x2c, 0x83 } \
}
#define CPU_STACK_SWITCH_EXCEPTION_NUMBER \
FixedPcdGetSize (PcdCpuStackSwitchExceptionList)
#define CPU_STACK_SWITCH_EXCEPTION_LIST \
FixedPcdGetPtr (PcdCpuStackSwitchExceptionList)
#define CPU_KNOWN_GOOD_STACK_SIZE \
FixedPcdGet32 (PcdCpuKnownGoodStackSize)
#define CPU_TSS_GDT_SIZE (SIZE_2KB + CPU_TSS_DESC_SIZE + CPU_TSS_SIZE)
//
// Record exception handler information
//
typedef struct {
UINTN ExceptionStart;
UINTN ExceptionStubHeaderSize;
UINTN HookAfterStubHeaderStart;
} EXCEPTION_HANDLER_TEMPLATE_MAP;
typedef struct {
UINTN IdtEntryCount;
SPIN_LOCK DisplayMessageSpinLock;
RESERVED_VECTORS_DATA *ReservedVectors;
EFI_CPU_INTERRUPT_HANDLER *ExternalInterruptHandler;
} EXCEPTION_HANDLER_DATA;
extern CONST UINT32 mErrorCodeFlag;
extern CONST UINTN mDoFarReturnFlag;
/**
Return address map of exception handler template so that C code can generate
exception tables.
@param AddressMap Pointer to a buffer where the address map is returned.
**/
VOID
EFIAPI
AsmGetTemplateAddressMap (
OUT EXCEPTION_HANDLER_TEMPLATE_MAP *AddressMap
);
/**
Return address map of exception handler template so that C code can generate
exception tables.
@param IdtEntry Pointer to IDT entry to be updated.
@param InterruptHandler IDT handler value.
**/
VOID
ArchUpdateIdtEntry (
IN IA32_IDT_GATE_DESCRIPTOR *IdtEntry,
IN UINTN InterruptHandler
);
/**
Read IDT handler value from IDT entry.
@param IdtEntry Pointer to IDT entry to be read.
**/
UINTN
ArchGetIdtHandler (
IN IA32_IDT_GATE_DESCRIPTOR *IdtEntry
);
/**
Prints a message to the serial port.
@param Format Format string for the message to print.
@param ... Variable argument list whose contents are accessed
based on the format string specified by Format.
**/
VOID
EFIAPI
InternalPrintMessage (
IN CONST CHAR8 *Format,
...
);
/**
Find and display image base address and return image base and its entry point.
@param CurrentEip Current instruction pointer.
**/
VOID
DumpModuleImageInfo (
IN UINTN CurrentEip
);
/**
Display CPU information.
@param ExceptionType Exception type.
@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
**/
VOID
DumpImageAndCpuContent (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN EFI_SYSTEM_CONTEXT SystemContext
);
/**
Internal worker function to initialize exception handler.
@param[in] VectorInfo Pointer to reserved vector list.
@param[in, out] ExceptionHandlerData Pointer to exception handler data.
@retval EFI_SUCCESS CPU Exception Entries have been successfully initialized
with default exception handlers.
@retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
@retval EFI_UNSUPPORTED This function is not supported.
**/
EFI_STATUS
InitializeCpuExceptionHandlersWorker (
IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL,
IN OUT EXCEPTION_HANDLER_DATA *ExceptionHandlerData
);
/**
Registers a function to be called from the processor interrupt handler.
@param[in] InterruptType Defines which interrupt or exception to hook.
@param[in] InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
when a processor interrupt occurs. If this parameter is NULL, then the handler
will be uninstalled
@param[in] ExceptionHandlerData Pointer to exception handler data.
@retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was
previously installed.
@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
previously installed.
@retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported,
or this function is not supported.
**/
EFI_STATUS
RegisterCpuInterruptHandlerWorker (
IN EFI_EXCEPTION_TYPE InterruptType,
IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler,
IN EXCEPTION_HANDLER_DATA *ExceptionHandlerData
);
/**
Internal worker function to update IDT entries accordling to vector attributes.
@param[in] IdtTable Pointer to IDT table.
@param[in] TemplateMap Pointer to a buffer where the address map is
returned.
@param[in] ExceptionHandlerData Pointer to exception handler data.
**/
VOID
UpdateIdtTable (
IN IA32_IDT_GATE_DESCRIPTOR *IdtTable,
IN EXCEPTION_HANDLER_TEMPLATE_MAP *TemplateMap,
IN EXCEPTION_HANDLER_DATA *ExceptionHandlerData
);
/**
Save CPU exception context when handling EFI_VECTOR_HANDOFF_HOOK_AFTER case.
@param[in] ExceptionType Exception type.
@param[in] SystemContext Pointer to EFI_SYSTEM_CONTEXT.
@param[in] ExceptionHandlerData Pointer to exception handler data.
**/
VOID
ArchSaveExceptionContext (
IN UINTN ExceptionType,
IN EFI_SYSTEM_CONTEXT SystemContext,
IN EXCEPTION_HANDLER_DATA *ExceptionHandlerData
);
/**
Restore CPU exception context when handling EFI_VECTOR_HANDOFF_HOOK_AFTER case.
@param[in] ExceptionType Exception type.
@param[in] SystemContext Pointer to EFI_SYSTEM_CONTEXT.
@param[in] ExceptionHandlerData Pointer to exception handler data.
**/
VOID
ArchRestoreExceptionContext (
IN UINTN ExceptionType,
IN EFI_SYSTEM_CONTEXT SystemContext,
IN EXCEPTION_HANDLER_DATA *ExceptionHandlerData
);
/**
Fix up the vector number and function address in the vector code.
@param[in] NewVectorAddr New vector handler address.
@param[in] VectorNum Index of vector.
@param[in] OldVectorAddr Old vector handler address.
**/
VOID
EFIAPI
AsmVectorNumFixup (
IN VOID *NewVectorAddr,
IN UINT8 VectorNum,
IN VOID *OldVectorAddr
);
/**
Read and save reserved vector information
@param[in] VectorInfo Pointer to reserved vector list.
@param[out] ReservedVector Pointer to reserved vector data buffer.
@param[in] VectorCount Vector number to be updated.
@return EFI_SUCCESS Read and save vector info successfully.
@retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
**/
EFI_STATUS
ReadAndVerifyVectorInfo (
IN EFI_VECTOR_HANDOFF_INFO *VectorInfo,
OUT RESERVED_VECTORS_DATA *ReservedVector,
IN UINTN VectorCount
);
/**
Get ASCII format string exception name by exception type.
@param ExceptionType Exception type.
@return ASCII format string exception name.
**/
CONST CHAR8 *
GetExceptionNameStr (
IN EFI_EXCEPTION_TYPE ExceptionType
);
/**
Internal worker function for common exception handler.
@param ExceptionType Exception type.
@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
@param ExceptionHandlerData Pointer to exception handler data.
**/
VOID
CommonExceptionHandlerWorker (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN EFI_SYSTEM_CONTEXT SystemContext,
IN EXCEPTION_HANDLER_DATA *ExceptionHandlerData
);
/**
Setup separate stack for specific exceptions.
@param[in] StackSwitchData Pointer to data required for setuping up
stack switch.
@retval EFI_SUCCESS The exceptions have been successfully
initialized with new stack.
@retval EFI_INVALID_PARAMETER StackSwitchData contains invalid content.
**/
EFI_STATUS
ArchSetupExcpetionStack (
IN CPU_EXCEPTION_INIT_DATA *StackSwitchData
);
/**
Return address map of exception handler template so that C code can generate
exception tables. The template is only for exceptions using task gate instead
of interrupt gate.
@param AddressMap Pointer to a buffer where the address map is returned.
**/
VOID
EFIAPI
AsmGetTssTemplateMap (
OUT EXCEPTION_HANDLER_TEMPLATE_MAP *AddressMap
);
#endif
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