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354 lines
5.3 KiB
354 lines
5.3 KiB
package vm
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import (
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"fmt"
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"gopkg.in/fatih/set.v0"
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)
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type OpCode byte
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// Op codes
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const (
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// 0x0 range - arithmetic ops
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STOP OpCode = iota
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ADD
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MUL
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SUB
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DIV
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SDIV
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MOD
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SMOD
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ADDMOD
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MULMOD
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EXP
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SIGNEXTEND
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)
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const (
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LT OpCode = iota + 0x10
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GT
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SLT
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SGT
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EQ
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ISZERO
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AND
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OR
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XOR
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NOT
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BYTE
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SHA3 = 0x20
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)
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const (
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// 0x30 range - closure state
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ADDRESS OpCode = 0x30 + iota
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BALANCE
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ORIGIN
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CALLER
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CALLVALUE
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CALLDATALOAD
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CALLDATASIZE
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CALLDATACOPY
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CODESIZE
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CODECOPY
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GASPRICE_DEPRECATED
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EXTCODESIZE
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EXTCODECOPY
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)
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const (
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// 0x40 range - block operations
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BLOCKHASH OpCode = 0x40 + iota
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COINBASE
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TIMESTAMP
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BLOCKHEIGHT
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DIFFICULTY_DEPRECATED
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GASLIMIT
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)
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const (
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// 0x50 range - 'storage' and execution
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POP OpCode = 0x50 + iota
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MLOAD
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MSTORE
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MSTORE8
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SLOAD
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SSTORE
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JUMP
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JUMPI
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PC
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MSIZE
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GAS
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JUMPDEST
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)
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const (
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// 0x60 range
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PUSH1 OpCode = 0x60 + iota
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PUSH2
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PUSH3
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PUSH4
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PUSH5
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PUSH6
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PUSH7
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PUSH8
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PUSH9
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PUSH10
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PUSH11
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PUSH12
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PUSH13
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PUSH14
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PUSH15
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PUSH16
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PUSH17
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PUSH18
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PUSH19
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PUSH20
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PUSH21
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PUSH22
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PUSH23
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PUSH24
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PUSH25
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PUSH26
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PUSH27
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PUSH28
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PUSH29
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PUSH30
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PUSH31
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PUSH32
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DUP1
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DUP2
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DUP3
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DUP4
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DUP5
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DUP6
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DUP7
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DUP8
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DUP9
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DUP10
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DUP11
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DUP12
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DUP13
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DUP14
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DUP15
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DUP16
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SWAP1
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SWAP2
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SWAP3
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SWAP4
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SWAP5
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SWAP6
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SWAP7
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SWAP8
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SWAP9
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SWAP10
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SWAP11
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SWAP12
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SWAP13
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SWAP14
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SWAP15
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SWAP16
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)
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const (
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LOG0 OpCode = 0xa0 + iota
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LOG1
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LOG2
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LOG3
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LOG4
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)
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const (
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// 0xf0 range - closures
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CREATE OpCode = 0xf0 + iota
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CALL
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CALLCODE
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RETURN
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// 0x70 range - other
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SUICIDE = 0xff
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)
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// Since the opcodes aren't all in order we can't use a regular slice
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var opCodeToString = map[OpCode]string{
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// 0x0 range - arithmetic ops
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STOP: "STOP",
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ADD: "ADD",
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MUL: "MUL",
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SUB: "SUB",
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DIV: "DIV",
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SDIV: "SDIV",
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MOD: "MOD",
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SMOD: "SMOD",
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EXP: "EXP",
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NOT: "NOT",
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LT: "LT",
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GT: "GT",
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SLT: "SLT",
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SGT: "SGT",
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EQ: "EQ",
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ISZERO: "ISZERO",
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SIGNEXTEND: "SIGNEXTEND",
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// 0x10 range - bit ops
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AND: "AND",
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OR: "OR",
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XOR: "XOR",
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BYTE: "BYTE",
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ADDMOD: "ADDMOD",
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MULMOD: "MULMOD",
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// 0x20 range - crypto
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SHA3: "SHA3",
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// 0x30 range - closure state
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ADDRESS: "ADDRESS",
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BALANCE: "BALANCE",
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ORIGIN: "ORIGIN",
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CALLER: "CALLER",
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CALLVALUE: "CALLVALUE",
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CALLDATALOAD: "CALLDATALOAD",
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CALLDATASIZE: "CALLDATASIZE",
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CALLDATACOPY: "CALLDATACOPY",
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CODESIZE: "CODESIZE",
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CODECOPY: "CODECOPY",
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GASPRICE_DEPRECATED: "TXGASPRICE_DEPRECATED",
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// 0x40 range - block operations
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BLOCKHASH: "BLOCKHASH",
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COINBASE: "COINBASE",
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TIMESTAMP: "TIMESTAMP",
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BLOCKHEIGHT: "BLOCKHEIGHT",
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DIFFICULTY_DEPRECATED: "DIFFICULTY_DEPRECATED",
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GASLIMIT: "GASLIMIT",
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EXTCODESIZE: "EXTCODESIZE",
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EXTCODECOPY: "EXTCODECOPY",
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// 0x50 range - 'storage' and execution
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POP: "POP",
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//DUP: "DUP",
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//SWAP: "SWAP",
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MLOAD: "MLOAD",
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MSTORE: "MSTORE",
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MSTORE8: "MSTORE8",
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SLOAD: "SLOAD",
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SSTORE: "SSTORE",
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JUMP: "JUMP",
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JUMPI: "JUMPI",
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PC: "PC",
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MSIZE: "MSIZE",
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GAS: "GAS",
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JUMPDEST: "JUMPDEST",
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// 0x60 range - push
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PUSH1: "PUSH1",
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PUSH2: "PUSH2",
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PUSH3: "PUSH3",
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PUSH4: "PUSH4",
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PUSH5: "PUSH5",
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PUSH6: "PUSH6",
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PUSH7: "PUSH7",
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PUSH8: "PUSH8",
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PUSH9: "PUSH9",
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PUSH10: "PUSH10",
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PUSH11: "PUSH11",
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PUSH12: "PUSH12",
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PUSH13: "PUSH13",
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PUSH14: "PUSH14",
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PUSH15: "PUSH15",
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PUSH16: "PUSH16",
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PUSH17: "PUSH17",
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PUSH18: "PUSH18",
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PUSH19: "PUSH19",
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PUSH20: "PUSH20",
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PUSH21: "PUSH21",
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PUSH22: "PUSH22",
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PUSH23: "PUSH23",
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PUSH24: "PUSH24",
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PUSH25: "PUSH25",
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PUSH26: "PUSH26",
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PUSH27: "PUSH27",
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PUSH28: "PUSH28",
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PUSH29: "PUSH29",
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PUSH30: "PUSH30",
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PUSH31: "PUSH31",
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PUSH32: "PUSH32",
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DUP1: "DUP1",
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DUP2: "DUP2",
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DUP3: "DUP3",
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DUP4: "DUP4",
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DUP5: "DUP5",
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DUP6: "DUP6",
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DUP7: "DUP7",
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DUP8: "DUP8",
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DUP9: "DUP9",
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DUP10: "DUP10",
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DUP11: "DUP11",
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DUP12: "DUP12",
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DUP13: "DUP13",
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DUP14: "DUP14",
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DUP15: "DUP15",
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DUP16: "DUP16",
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SWAP1: "SWAP1",
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SWAP2: "SWAP2",
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SWAP3: "SWAP3",
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SWAP4: "SWAP4",
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SWAP5: "SWAP5",
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SWAP6: "SWAP6",
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SWAP7: "SWAP7",
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SWAP8: "SWAP8",
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SWAP9: "SWAP9",
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SWAP10: "SWAP10",
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SWAP11: "SWAP11",
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SWAP12: "SWAP12",
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SWAP13: "SWAP13",
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SWAP14: "SWAP14",
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SWAP15: "SWAP15",
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SWAP16: "SWAP16",
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LOG0: "LOG0",
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LOG1: "LOG1",
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LOG2: "LOG2",
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LOG3: "LOG3",
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LOG4: "LOG4",
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// 0xf0 range
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CREATE: "CREATE",
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CALL: "CALL",
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RETURN: "RETURN",
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CALLCODE: "CALLCODE",
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// 0x70 range - other
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SUICIDE: "SUICIDE",
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}
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func (o OpCode) String() string {
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str := opCodeToString[o]
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if len(str) == 0 {
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return fmt.Sprintf("Missing opcode 0x%x", int(o))
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}
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return str
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}
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//-----------------------------------------------------------------------------
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func AnalyzeJumpDests(code []byte) (dests *set.Set) {
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dests = set.New()
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for pc := uint64(0); pc < uint64(len(code)); pc++ {
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var op OpCode = OpCode(code[pc])
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switch op {
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case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
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a := uint64(op) - uint64(PUSH1) + 1
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pc += a
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case JUMPDEST:
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dests.Add(pc)
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}
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}
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return
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}
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