diff options
Diffstat (limited to 'core/vm/instructions.go')
| -rw-r--r-- | core/vm/instructions.go | 78 |
1 files changed, 52 insertions, 26 deletions
diff --git a/core/vm/instructions.go b/core/vm/instructions.go index aaa8d7945..4d6197912 100644 --- a/core/vm/instructions.go +++ b/core/vm/instructions.go @@ -29,8 +29,9 @@ import ( ) var ( - bigZero = new(big.Int) - errWriteProtection = errors.New("evm: write protection") + bigZero = new(big.Int) + errWriteProtection = errors.New("evm: write protection") + errReturnDataOutOfBounds = errors.New("evm: return data out of bounds") ) func opAdd(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { @@ -242,6 +243,7 @@ func opAnd(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stac evm.interpreter.intPool.put(y) return nil, nil } + func opOr(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { x, y := stack.pop(), stack.pop() stack.push(x.Or(x, y)) @@ -249,6 +251,7 @@ func opOr(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack evm.interpreter.intPool.put(y) return nil, nil } + func opXor(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { x, y := stack.pop(), stack.pop() stack.push(x.Xor(x, y)) @@ -268,6 +271,7 @@ func opByte(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Sta evm.interpreter.intPool.put(th) return nil, nil } + func opAddmod(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { x, y, z := stack.pop(), stack.pop(), stack.pop() if z.Cmp(bigZero) > 0 { @@ -281,6 +285,7 @@ func opAddmod(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *S evm.interpreter.intPool.put(y, z) return nil, nil } + func opMulmod(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { x, y, z := stack.pop(), stack.pop(), stack.pop() if z.Cmp(bigZero) > 0 { @@ -338,25 +343,47 @@ func opCallValue(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack return nil, nil } -func opCalldataLoad(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { +func opCallDataLoad(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { stack.push(new(big.Int).SetBytes(getDataBig(contract.Input, stack.pop(), big32))) return nil, nil } -func opCalldataSize(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { +func opCallDataSize(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { stack.push(evm.interpreter.intPool.get().SetInt64(int64(len(contract.Input)))) return nil, nil } -func opCalldataCopy(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { +func opCallDataCopy(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { + var ( + memOffset = stack.pop() + dataOffset = stack.pop() + length = stack.pop() + ) + memory.Set(memOffset.Uint64(), length.Uint64(), getDataBig(contract.Input, dataOffset, length)) + + evm.interpreter.intPool.put(memOffset, dataOffset, length) + return nil, nil +} + +func opReturnDataSize(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { + stack.push(evm.interpreter.intPool.get().SetUint64(uint64(len(evm.interpreter.returnData)))) + return nil, nil +} + +func opReturnDataCopy(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { var ( - mOff = stack.pop() - cOff = stack.pop() - l = stack.pop() + memOffset = stack.pop() + dataOffset = stack.pop() + length = stack.pop() ) - memory.Set(mOff.Uint64(), l.Uint64(), getDataBig(contract.Input, cOff, l)) + defer evm.interpreter.intPool.put(memOffset, dataOffset, length) + + end := new(big.Int).Add(dataOffset, length) + if end.BitLen() > 64 || uint64(len(evm.interpreter.returnData)) < end.Uint64() { + return nil, errReturnDataOutOfBounds + } + memory.Set(memOffset.Uint64(), length.Uint64(), evm.interpreter.returnData[dataOffset.Uint64():end.Uint64()]) - evm.interpreter.intPool.put(mOff, cOff, l) return nil, nil } @@ -378,31 +405,28 @@ func opCodeSize(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack func opCodeCopy(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { var ( - mOff = stack.pop() - cOff = stack.pop() - l = stack.pop() + memOffset = stack.pop() + codeOffset = stack.pop() + length = stack.pop() ) - codeCopy := getDataBig(contract.Code, cOff, l) + codeCopy := getDataBig(contract.Code, codeOffset, length) + memory.Set(memOffset.Uint64(), length.Uint64(), codeCopy) - memory.Set(mOff.Uint64(), l.Uint64(), codeCopy) - - evm.interpreter.intPool.put(mOff, cOff, l) + evm.interpreter.intPool.put(memOffset, codeOffset, length) return nil, nil } func opExtCodeCopy(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { var ( - addr = common.BigToAddress(stack.pop()) - mOff = stack.pop() - cOff = stack.pop() - l = stack.pop() + addr = common.BigToAddress(stack.pop()) + memOffset = stack.pop() + codeOffset = stack.pop() + length = stack.pop() ) - codeCopy := getDataBig(evm.StateDB.GetCode(addr), cOff, l) - - memory.Set(mOff.Uint64(), l.Uint64(), codeCopy) - - evm.interpreter.intPool.put(mOff, cOff, l) + codeCopy := getDataBig(evm.StateDB.GetCode(addr), codeOffset, length) + memory.Set(memOffset.Uint64(), length.Uint64(), codeCopy) + evm.interpreter.intPool.put(memOffset, codeOffset, length) return nil, nil } @@ -507,6 +531,7 @@ func opJump(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Sta evm.interpreter.intPool.put(pos) return nil, nil } + func opJumpi(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { pos, cond := stack.pop(), stack.pop() if cond.Sign() != 0 { @@ -522,6 +547,7 @@ func opJumpi(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *St evm.interpreter.intPool.put(pos, cond) return nil, nil } + func opJumpdest(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { return nil, nil } |