127 lines
3.8 KiB
Go
127 lines
3.8 KiB
Go
package vm
|
|
|
|
import (
|
|
"fmt"
|
|
"math/big"
|
|
|
|
"github.com/ethereum/go-ethereum/params"
|
|
)
|
|
|
|
var (
|
|
GasQuickStep = big.NewInt(2)
|
|
GasFastestStep = big.NewInt(3)
|
|
GasFastStep = big.NewInt(5)
|
|
GasMidStep = big.NewInt(8)
|
|
GasSlowStep = big.NewInt(10)
|
|
GasExtStep = big.NewInt(20)
|
|
|
|
GasReturn = big.NewInt(0)
|
|
GasStop = big.NewInt(0)
|
|
|
|
GasContractByte = big.NewInt(200)
|
|
)
|
|
|
|
func baseCheck(op OpCode, stack *stack, gas *big.Int) error {
|
|
// PUSH and DUP are a bit special. They all cost the same but we do want to have checking on stack push limit
|
|
// PUSH is also allowed to calculate the same price for all PUSHes
|
|
// DUP requirements are handled elsewhere (except for the stack limit check)
|
|
if op >= PUSH1 && op <= PUSH32 {
|
|
op = PUSH1
|
|
}
|
|
if op >= DUP1 && op <= DUP16 {
|
|
op = DUP1
|
|
}
|
|
|
|
if r, ok := _baseCheck[op]; ok {
|
|
err := stack.require(r.stackPop)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if r.stackPush && len(stack.data)-r.stackPop > int(params.StackLimit.Int64()) {
|
|
return fmt.Errorf("stack limit reached %d (%d)", len(stack.data), params.StackLimit.Int64())
|
|
}
|
|
|
|
gas.Add(gas, r.gas)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func toWordSize(size *big.Int) *big.Int {
|
|
tmp := new(big.Int)
|
|
tmp.Add(size, u256(31))
|
|
tmp.Div(tmp, u256(32))
|
|
return tmp
|
|
}
|
|
|
|
type req struct {
|
|
stackPop int
|
|
gas *big.Int
|
|
stackPush bool
|
|
}
|
|
|
|
var _baseCheck = map[OpCode]req{
|
|
// opcode | stack pop | gas price | stack push
|
|
ADD: {2, GasFastestStep, true},
|
|
LT: {2, GasFastestStep, true},
|
|
GT: {2, GasFastestStep, true},
|
|
SLT: {2, GasFastestStep, true},
|
|
SGT: {2, GasFastestStep, true},
|
|
EQ: {2, GasFastestStep, true},
|
|
ISZERO: {1, GasFastestStep, true},
|
|
SUB: {2, GasFastestStep, true},
|
|
AND: {2, GasFastestStep, true},
|
|
OR: {2, GasFastestStep, true},
|
|
XOR: {2, GasFastestStep, true},
|
|
NOT: {1, GasFastestStep, true},
|
|
BYTE: {2, GasFastestStep, true},
|
|
CALLDATALOAD: {1, GasFastestStep, true},
|
|
CALLDATACOPY: {3, GasFastestStep, true},
|
|
MLOAD: {1, GasFastestStep, true},
|
|
MSTORE: {2, GasFastestStep, false},
|
|
MSTORE8: {2, GasFastestStep, false},
|
|
CODECOPY: {3, GasFastestStep, false},
|
|
MUL: {2, GasFastStep, true},
|
|
DIV: {2, GasFastStep, true},
|
|
SDIV: {2, GasFastStep, true},
|
|
MOD: {2, GasFastStep, true},
|
|
SMOD: {2, GasFastStep, true},
|
|
SIGNEXTEND: {2, GasFastStep, true},
|
|
ADDMOD: {3, GasMidStep, true},
|
|
MULMOD: {3, GasMidStep, true},
|
|
JUMP: {1, GasMidStep, false},
|
|
JUMPI: {2, GasSlowStep, false},
|
|
EXP: {2, GasSlowStep, true},
|
|
ADDRESS: {0, GasQuickStep, true},
|
|
ORIGIN: {0, GasQuickStep, true},
|
|
CALLER: {0, GasQuickStep, true},
|
|
CALLVALUE: {0, GasQuickStep, true},
|
|
CODESIZE: {0, GasQuickStep, true},
|
|
GASPRICE: {0, GasQuickStep, true},
|
|
COINBASE: {0, GasQuickStep, true},
|
|
TIMESTAMP: {0, GasQuickStep, true},
|
|
NUMBER: {0, GasQuickStep, true},
|
|
CALLDATASIZE: {0, GasQuickStep, true},
|
|
DIFFICULTY: {0, GasQuickStep, true},
|
|
GASLIMIT: {0, GasQuickStep, true},
|
|
POP: {1, GasQuickStep, false},
|
|
PC: {0, GasQuickStep, true},
|
|
MSIZE: {0, GasQuickStep, true},
|
|
GAS: {0, GasQuickStep, true},
|
|
BLOCKHASH: {1, GasExtStep, true},
|
|
BALANCE: {1, GasExtStep, true},
|
|
EXTCODESIZE: {1, GasExtStep, true},
|
|
EXTCODECOPY: {4, GasExtStep, false},
|
|
SLOAD: {1, params.SloadGas, true},
|
|
SSTORE: {2, Zero, false},
|
|
SHA3: {2, params.Sha3Gas, true},
|
|
CREATE: {3, params.CreateGas, true},
|
|
CALL: {7, params.CallGas, true},
|
|
CALLCODE: {7, params.CallGas, true},
|
|
JUMPDEST: {0, params.JumpdestGas, false},
|
|
SUICIDE: {1, Zero, false},
|
|
RETURN: {2, Zero, false},
|
|
PUSH1: {0, GasFastestStep, true},
|
|
DUP1: {0, Zero, true},
|
|
}
|