diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c new file mode 100644 index 00000000..7cc87955 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c @@ -0,0 +1,228 @@ +/** @file + CPU exception handler library implemenation for SEC/PEIM modules. + +Copyright (c) 2012 - 2018, Intel Corporation. All rights reserved.<BR> +SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include <PiPei.h> +#include <Library/VmgExitLib.h> +#include "CpuExceptionCommon.h" + +CONST UINTN mDoFarReturnFlag = 0; + +/** + Common exception handler. + + @param ExceptionType Exception type. + @param SystemContext Pointer to EFI_SYSTEM_CONTEXT. +**/ +VOID +EFIAPI +CommonExceptionHandler ( + IN EFI_EXCEPTION_TYPE ExceptionType, + IN EFI_SYSTEM_CONTEXT SystemContext + ) +{ + if (ExceptionType == VC_EXCEPTION) { + EFI_STATUS Status; + // + // #VC needs to be handled immediately upon enabling exception handling + // and therefore can't use the RegisterCpuInterruptHandler() interface + // (which isn't supported under Sec and Pei anyway). + // + // Handle the #VC: + // On EFI_SUCCESS - Exception has been handled, return + // On other - ExceptionType contains (possibly new) exception + // value + // + Status = VmgExitHandleVc (&ExceptionType, SystemContext); + if (!EFI_ERROR (Status)) { + return; + } + } + + // + // Initialize the serial port before dumping. + // + SerialPortInitialize (); + // + // Display ExceptionType, CPU information and Image information + // + DumpImageAndCpuContent (ExceptionType, SystemContext); + + // + // Enter a dead loop. + // + CpuDeadLoop (); +} + +/** + Initializes all CPU exceptions entries and provides the default exception handlers. + + Caller should try to get an array of interrupt and/or exception vectors that are in use and need to + persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification. + If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL. + If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly. + Note: Before invoking this API, caller must allocate memory for IDT table and load + IDTR by AsmWriteIdtr(). + + @param[in] VectorInfo Pointer to reserved vector list. + + @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 +EFIAPI +InitializeCpuExceptionHandlers ( + IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL + ) +{ + EFI_STATUS Status; + RESERVED_VECTORS_DATA ReservedVectorData[CPU_EXCEPTION_NUM]; + IA32_DESCRIPTOR IdtDescriptor; + UINTN IdtEntryCount; + UINT16 CodeSegment; + EXCEPTION_HANDLER_TEMPLATE_MAP TemplateMap; + IA32_IDT_GATE_DESCRIPTOR *IdtTable; + UINTN Index; + UINTN InterruptHandler; + + if (VectorInfo != NULL) { + SetMem ((VOID *) ReservedVectorData, sizeof (RESERVED_VECTORS_DATA) * CPU_EXCEPTION_NUM, 0xff); + Status = ReadAndVerifyVectorInfo (VectorInfo, ReservedVectorData, CPU_EXCEPTION_NUM); + if (EFI_ERROR (Status)) { + return EFI_INVALID_PARAMETER; + } + } + // + // Read IDT descriptor and calculate IDT size + // + AsmReadIdtr (&IdtDescriptor); + IdtEntryCount = (IdtDescriptor.Limit + 1) / sizeof (IA32_IDT_GATE_DESCRIPTOR); + if (IdtEntryCount > CPU_EXCEPTION_NUM) { + // + // CPU exception library only setup CPU_EXCEPTION_NUM exception handler at most + // + IdtEntryCount = CPU_EXCEPTION_NUM; + } + // + // Use current CS as the segment selector of interrupt gate in IDT + // + CodeSegment = AsmReadCs (); + + AsmGetTemplateAddressMap (&TemplateMap); + IdtTable = (IA32_IDT_GATE_DESCRIPTOR *)IdtDescriptor.Base; + for (Index = 0; Index < IdtEntryCount; Index ++) { + IdtTable[Index].Bits.Selector = CodeSegment; + // + // Check reserved vectors attributes if has, only EFI_VECTOR_HANDOFF_DO_NOT_HOOK + // supported in this instance + // + if (VectorInfo != NULL) { + if (ReservedVectorData[Index].Attribute == EFI_VECTOR_HANDOFF_DO_NOT_HOOK) { + continue; + } + } + // + // Update IDT entry + // + InterruptHandler = TemplateMap.ExceptionStart + Index * TemplateMap.ExceptionStubHeaderSize; + ArchUpdateIdtEntry (&IdtTable[Index], InterruptHandler); + } + return EFI_SUCCESS; +} + +/** + Initializes all CPU interrupt/exceptions entries and provides the default interrupt/exception handlers. + + Caller should try to get an array of interrupt and/or exception vectors that are in use and need to + persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification. + If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL. + If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly. + + @param[in] VectorInfo Pointer to reserved vector list. + + @retval EFI_SUCCESS All CPU interrupt/exception entries have been successfully initialized + with default interrupt/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 +EFIAPI +InitializeCpuInterruptHandlers ( + IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL + ) +{ + return EFI_UNSUPPORTED; +} + +/** + Registers a function to be called from the processor interrupt handler. + + This function registers and enables the handler specified by InterruptHandler for a processor + interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the + handler for the processor interrupt or exception type specified by InterruptType is uninstalled. + The installed handler is called once for each processor interrupt or exception. + NOTE: This function should be invoked after InitializeCpuExceptionHandlers() or + InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED returned. + + @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. + + @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 +EFIAPI +RegisterCpuInterruptHandler ( + IN EFI_EXCEPTION_TYPE InterruptType, + IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler + ) +{ + return EFI_UNSUPPORTED; +} + +/** + 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); +} |