mirror of https://github.com/acidanthera/audk.git
387 lines
11 KiB
C
387 lines
11 KiB
C
/** @file
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Header file for Virtual Machine support. Contains EBC defines that can
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be of use to a disassembler for the most part. Also provides function
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prototypes for VM functions.
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Copyright (c) 2006 - 2008, Intel Corporation. <BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef _EBC_EXECUTE_H_
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#define _EBC_EXECUTE_H_
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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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// Macros to check and set alignment
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//
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#define ASSERT_ALIGNED(addr, size) ASSERT (!((UINT32) (addr) & (size - 1)))
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#define IS_ALIGNED(addr, size) !((UINT32) (addr) & (size - 1))
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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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// Bit masks for opcode encodings
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//
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#define OPCODE_M_OPCODE 0x3F // bits of interest for first level decode
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#define OPCODE_M_IMMDATA 0x80
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#define OPCODE_M_IMMDATA64 0x40
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#define OPCODE_M_64BIT 0x40 // for CMP
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#define OPCODE_M_RELADDR 0x10 // for CALL instruction
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#define OPCODE_M_CMPI32_DATA 0x80 // for CMPI
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#define OPCODE_M_CMPI64 0x40 // for CMPI 32 or 64 bit comparison
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#define OPERAND_M_MOVIN_N 0x80
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#define OPERAND_M_CMPI_INDEX 0x10
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//
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// Masks for instructions that encode presence of indexes for operand1 and/or
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// operand2.
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//
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#define OPCODE_M_IMMED_OP1 0x80
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#define OPCODE_M_IMMED_OP2 0x40
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//
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// Bit masks for operand encodings
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//
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#define OPERAND_M_INDIRECT1 0x08
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#define OPERAND_M_INDIRECT2 0x80
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#define OPERAND_M_OP1 0x07
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#define OPERAND_M_OP2 0x70
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//
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// Masks for data manipulation instructions
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//
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#define DATAMANIP_M_64 0x40 // 64-bit width operation
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#define DATAMANIP_M_IMMDATA 0x80
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//
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// For MOV instructions, need a mask for the opcode when immediate
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// data applies to R2.
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//
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#define OPCODE_M_IMMED_OP2 0x40
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//
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// The MOVI/MOVIn instructions use bit 6 of operands byte to indicate
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// if an index is present. Then bits 4 and 5 are used to indicate the width
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// of the move.
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//
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#define MOVI_M_IMMDATA 0x40
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#define MOVI_M_DATAWIDTH 0xC0
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#define MOVI_DATAWIDTH16 0x40
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#define MOVI_DATAWIDTH32 0x80
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#define MOVI_DATAWIDTH64 0xC0
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#define MOVI_M_MOVEWIDTH 0x30
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#define MOVI_MOVEWIDTH8 0x00
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#define MOVI_MOVEWIDTH16 0x10
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#define MOVI_MOVEWIDTH32 0x20
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#define MOVI_MOVEWIDTH64 0x30
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//
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// Masks for CALL instruction encodings
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//
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#define OPERAND_M_RELATIVE_ADDR 0x10
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#define OPERAND_M_NATIVE_CALL 0x20
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//
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// Masks for decoding push/pop instructions
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//
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#define PUSHPOP_M_IMMDATA 0x80 // opcode bit indicating immediate data
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#define PUSHPOP_M_64 0x40 // opcode bit indicating 64-bit operation
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//
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// Mask for operand of JMP instruction
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//
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#define JMP_M_RELATIVE 0x10
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#define JMP_M_CONDITIONAL 0x80
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#define JMP_M_CS 0x40
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//
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// Macros to determine if a given operand is indirect
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//
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#define OPERAND1_INDIRECT(op) ((op) & OPERAND_M_INDIRECT1)
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#define OPERAND2_INDIRECT(op) ((op) & OPERAND_M_INDIRECT2)
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//
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// Macros to extract the operands from second byte of instructions
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//
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#define OPERAND1_REGNUM(op) ((op) & OPERAND_M_OP1)
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#define OPERAND2_REGNUM(op) (((op) & OPERAND_M_OP2) >> 4)
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#define OPERAND1_CHAR(op) ('0' + OPERAND1_REGNUM (op))
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#define OPERAND2_CHAR(op) ('0' + OPERAND2_REGNUM (op))
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#define OPERAND1_REGDATA(pvm, op) pvm->R[OPERAND1_REGNUM (op)]
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#define OPERAND2_REGDATA(pvm, op) pvm->R[OPERAND2_REGNUM (op)]
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//
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// Condition masks usually for byte 1 encodings of code
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//
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#define CONDITION_M_CONDITIONAL 0x80
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#define CONDITION_M_CS 0x40
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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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// Debug macro
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//
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#define EBCMSG(s) gST->ConOut->OutputString (gST->ConOut, s)
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//
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// Define OPCODES
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//
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#define OPCODE_BREAK 0x00
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#define OPCODE_JMP 0x01
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#define OPCODE_JMP8 0x02
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#define OPCODE_CALL 0x03
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#define OPCODE_RET 0x04
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#define OPCODE_CMPEQ 0x05
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#define OPCODE_CMPLTE 0x06
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#define OPCODE_CMPGTE 0x07
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#define OPCODE_CMPULTE 0x08
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#define OPCODE_CMPUGTE 0x09
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#define OPCODE_NOT 0x0A
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#define OPCODE_NEG 0x0B
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#define OPCODE_ADD 0x0C
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#define OPCODE_SUB 0x0D
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#define OPCODE_MUL 0x0E
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#define OPCODE_MULU 0x0F
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#define OPCODE_DIV 0x10
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#define OPCODE_DIVU 0x11
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#define OPCODE_MOD 0x12
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#define OPCODE_MODU 0x13
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#define OPCODE_AND 0x14
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#define OPCODE_OR 0x15
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#define OPCODE_XOR 0x16
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#define OPCODE_SHL 0x17
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#define OPCODE_SHR 0x18
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#define OPCODE_ASHR 0x19
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#define OPCODE_EXTNDB 0x1A
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#define OPCODE_EXTNDW 0x1B
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#define OPCODE_EXTNDD 0x1C
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#define OPCODE_MOVBW 0x1D
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#define OPCODE_MOVWW 0x1E
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#define OPCODE_MOVDW 0x1F
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#define OPCODE_MOVQW 0x20
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#define OPCODE_MOVBD 0x21
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#define OPCODE_MOVWD 0x22
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#define OPCODE_MOVDD 0x23
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#define OPCODE_MOVQD 0x24
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#define OPCODE_MOVSNW 0x25 // Move signed natural with word index
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#define OPCODE_MOVSND 0x26 // Move signed natural with dword index
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//
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// #define OPCODE_27 0x27
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//
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#define OPCODE_MOVQQ 0x28 // Does this go away?
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#define OPCODE_LOADSP 0x29
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#define OPCODE_STORESP 0x2A
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#define OPCODE_PUSH 0x2B
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#define OPCODE_POP 0x2C
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#define OPCODE_CMPIEQ 0x2D
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#define OPCODE_CMPILTE 0x2E
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#define OPCODE_CMPIGTE 0x2F
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#define OPCODE_CMPIULTE 0x30
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#define OPCODE_CMPIUGTE 0x31
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#define OPCODE_MOVNW 0x32
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#define OPCODE_MOVND 0x33
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//
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// #define OPCODE_34 0x34
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//
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#define OPCODE_PUSHN 0x35
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#define OPCODE_POPN 0x36
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#define OPCODE_MOVI 0x37
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#define OPCODE_MOVIN 0x38
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#define OPCODE_MOVREL 0x39
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/**
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Execute an EBC image from an entry point or from a published protocol.
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@param VmPtr A pointer to a VM context.
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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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EFI_STATUS
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EbcExecute (
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IN VM_CONTEXT *VmPtr
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);
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/**
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Returns the version of the EBC virtual machine.
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@return The 64-bit version of EBC virtual machine.
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**/
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UINT64
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GetVmVersion (
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VOID
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);
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/**
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Writes UINTN data to memory address.
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This routine is called by the EBC data
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movement instructions that write to memory. Since these writes
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may be to the stack, which looks like (high address on top) this,
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[EBC entry point arguments]
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[VM stack]
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[EBC stack]
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we need to detect all attempts to write to the EBC entry point argument
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stack area and adjust the address (which will initially point into the
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VM stack) to point into the EBC entry point arguments.
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@param VmPtr A pointer to a VM context.
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@param Addr Adddress to write to.
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@param Data Value to write to Addr.
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@retval EFI_SUCCESS The instruction is executed successfully.
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@retval Other Some error occurs when writing data to the address.
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**/
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EFI_STATUS
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VmWriteMemN (
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IN VM_CONTEXT *VmPtr,
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IN UINTN Addr,
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IN UINTN Data
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);
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/**
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Writes 64-bit data to memory address.
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This routine is called by the EBC data
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movement instructions that write to memory. Since these writes
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may be to the stack, which looks like (high address on top) this,
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[EBC entry point arguments]
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[VM stack]
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[EBC stack]
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we need to detect all attempts to write to the EBC entry point argument
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stack area and adjust the address (which will initially point into the
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VM stack) to point into the EBC entry point arguments.
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@param VmPtr A pointer to a VM context.
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@param Addr Adddress to write to.
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@param Data Value to write to Addr.
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@retval EFI_SUCCESS The instruction is executed successfully.
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@retval Other Some error occurs when writing data to the address.
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**/
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EFI_STATUS
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VmWriteMem64 (
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IN VM_CONTEXT *VmPtr,
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IN UINTN Addr,
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IN UINT64 Data
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);
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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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0xAAEACCFDL, 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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typedef
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EFI_STATUS
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(*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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typedef
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EFI_STATUS
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(*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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typedef
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EFI_STATUS
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(*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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/**
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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 via the EBC VM test protocol.
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@param This A pointer to the EFI_EBC_VM_TEST_PROTOCOL structure.
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@param VmPtr A pointer to a VM context.
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@param 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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EFI_STATUS
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EbcExecuteInstructions (
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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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#endif // ifndef _EBC_EXECUTE_H_
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