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https://github.com/CloverHackyColor/CloverBootloader.git
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185 lines
6.4 KiB
C
185 lines
6.4 KiB
C
/** @file
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EBC VM Test protocol for test purposes.
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Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _EBC_VM_TEST_PROTOCOL_H_
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#define _EBC_VM_TEST_PROTOCOL_H_
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//
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// Define a protocol for an EBC VM test interface.
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//
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#define EFI_EBC_VM_TEST_PROTOCOL_GUID \
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{ \
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0xAAEACCFD, 0xF27B, 0x4C17, { 0xB6, 0x10, 0x75, 0xCA, 0x1F, 0x2D, 0xFB, 0x52 } \
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}
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//
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// Define for forward reference.
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//
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typedef struct _EFI_EBC_VM_TEST_PROTOCOL EFI_EBC_VM_TEST_PROTOCOL;
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//
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// VM major/minor version
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//
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#define VM_MAJOR_VERSION 1
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#define VM_MINOR_VERSION 0
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//
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// Bits in the VM->StopFlags field
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//
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#define STOPFLAG_APP_DONE 0x0001
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#define STOPFLAG_BREAKPOINT 0x0002
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#define STOPFLAG_INVALID_BREAK 0x0004
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#define STOPFLAG_BREAK_ON_CALLEX 0x0008
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//
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// Masks for working with the VM flags register
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//
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#define VMFLAGS_CC 0x0001 // condition flag
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#define VMFLAGS_STEP 0x0002 // step instruction mode
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#define VMFLAGS_ALL_VALID (VMFLAGS_CC | VMFLAGS_STEP)
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//
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// Macros for operating on the VM flags register
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//
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#define VMFLAG_SET(pVM, Flag) (pVM->Flags |= (Flag))
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#define VMFLAG_ISSET(pVM, Flag) ((pVM->Flags & (Flag)) ? 1 : 0)
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#define VMFLAG_CLEAR(pVM, Flag) (pVM->Flags &= ~(Flag))
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//
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// Define a macro to get the operand. Then we can change it to be either a
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// direct read or have it call a function to read memory.
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//
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#define GETOPERANDS(pVM) (UINT8) (*(UINT8 *) (pVM->Ip + 1))
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#define GETOPCODE(pVM) (UINT8) (*(UINT8 *) pVM->Ip)
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//
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// Macros for operating on the VM GP registers
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//
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#define OPERAND1_REGDATA(pVM, Op) pVM->Gpr[OPERAND1_REGNUM (Op)]
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#define OPERAND2_REGDATA(pVM, Op) pVM->Gpr[OPERAND2_REGNUM (Op)]
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//
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// Bits of exception flags field of VM context
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//
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#define EXCEPTION_FLAG_FATAL 0x80000000 // can't continue
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#define EXCEPTION_FLAG_ERROR 0x40000000 // bad, but try to continue
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#define EXCEPTION_FLAG_WARNING 0x20000000 // harmless problem
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#define EXCEPTION_FLAG_NONE 0x00000000 // for normal return
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///
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/// instruction pointer for the VM
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///
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typedef UINT8 *VMIP;
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typedef INT64 VM_REGISTER;
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typedef UINT32 EXCEPTION_FLAGS;
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typedef struct {
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VM_REGISTER Gpr[8]; ///< General purpose registers.
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///< Flags register:
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///< 0 Set to 1 if the result of the last compare was true
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///< 1 Set to 1 if stepping
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UINT64 Flags; ///< 2..63 Reserved.
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VMIP Ip; ///< Instruction pointer.
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UINTN LastException;
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EXCEPTION_FLAGS ExceptionFlags; ///< to keep track of exceptions
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UINT32 StopFlags;
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UINT32 CompilerVersion; ///< via break(6)
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UINTN HighStackBottom; ///< bottom of the upper stack
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UINTN LowStackTop; ///< top of the lower stack
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UINT64 StackRetAddr; ///< location of final return address on stack
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UINTN *StackMagicPtr; ///< pointer to magic value on stack to detect corruption
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EFI_HANDLE ImageHandle; ///< for this EBC driver
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EFI_SYSTEM_TABLE *SystemTable; ///< for debugging only
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UINTN LastAddrConverted; ///< for debug
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UINTN LastAddrConvertedValue; ///< for debug
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VOID *FramePtr;
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VOID *EntryPoint; ///< entry point of EBC image
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UINTN ImageBase;
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VOID *StackPool;
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VOID *StackTop;
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} VM_CONTEXT;
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/**
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Given a pointer to a new VM context, execute one or more instructions. This
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function is only used for test purposes.
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@param[in] This A pointer to the EFI_EBC_VM_TEST_PROTOCOL structure.
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@param[in] VmPtr A pointer to a VM context.
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@param[in, out] InstructionCount A pointer to a UINTN value holding the number of
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instructions to execute. If it holds value of 0,
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then the instruction to be executed is 1.
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@retval EFI_UNSUPPORTED At least one of the opcodes is not supported.
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@retval EFI_SUCCESS All of the instructions are executed successfully.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EBC_VM_TEST_EXECUTE) (
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IN EFI_EBC_VM_TEST_PROTOCOL *This,
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IN VM_CONTEXT *VmPtr,
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IN OUT UINTN *InstructionCount
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);
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/**
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Convert AsmText to the instruction. This function is only used for test purposes.
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@param[in] This A pointer to the EFI_EBC_VM_TEST_PROTOCOL structure.
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@param[in] AsmText A pointer to EBC ASM text code.
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@param[out] Buffer Buffer to store the instruction.
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@param[out] BufferLen Size of buffer that is required to store data.
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@retval EFI_UNSUPPORTED This functionality is unsupported.
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@retval EFI_SUCCESS Successfully convert AsmText to the instruction.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EBC_VM_TEST_ASM) (
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IN EFI_EBC_VM_TEST_PROTOCOL *This,
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IN CHAR16 *AsmText,
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IN OUT INT8 *Buffer,
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IN OUT UINTN *BufferLen
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);
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/**
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Dump the executed instruction. This function is only used for test purposes.
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@param[in] This A pointer to the EFI_EBC_VM_TEST_PROTOCOL structure.
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@param[out] AsmText Contain the disasm text.
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@param[out] Buffer Buffer to store the instruction.
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@param[out] BufferLen Size of buffer that is required to store data.
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@retval EFI_UNSUPPORTED This functionality is unsupported.
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@retval EFI_SUCCESS Successfully dump the executed instruction.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EBC_VM_TEST_DASM) (
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IN EFI_EBC_VM_TEST_PROTOCOL *This,
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IN OUT CHAR16 *AsmText,
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IN OUT INT8 *Buffer,
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IN OUT UINTN *Len
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);
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//
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// Prototype for the actual EBC test protocol interface
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//
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struct _EFI_EBC_VM_TEST_PROTOCOL {
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EBC_VM_TEST_EXECUTE Execute;
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EBC_VM_TEST_ASM Assemble;
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EBC_VM_TEST_DASM Disassemble;
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};
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extern EFI_GUID gEfiEbcVmTestProtocolGuid;
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#endif
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