/** @file
Common header file for CPU Exception Handler Library.
Copyright (c) 2012 - 2019, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _CPU_EXCEPTION_COMMON_H_
#define _CPU_EXCEPTION_COMMON_H_
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#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_SS BIT6
#define IA32_PF_EC_SGX BIT15
#include "ArchInterruptDefs.h"
#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 (
OUT 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
ArchSetupExceptionStack (
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