You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
108 lines
4.2 KiB
108 lines
4.2 KiB
/*
|
|
This file is part of cpp-ethereum.
|
|
|
|
cpp-ethereum is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
cpp-ethereum is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/** @file Assembly.h
|
|
* @author Gav Wood <i@gavwood.com>
|
|
* @date 2014
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <iostream>
|
|
#include <sstream>
|
|
#include <libdevcore/Common.h>
|
|
#include <libdevcore/Assertions.h>
|
|
#include <libevmcore/Instruction.h>
|
|
#include <libevmasm/SourceLocation.h>
|
|
#include "Exceptions.h"
|
|
|
|
namespace dev
|
|
{
|
|
namespace eth
|
|
{
|
|
|
|
enum AssemblyItemType { UndefinedItem, Operation, Push, PushString, PushTag, PushSub, PushSubSize, PushProgramSize, Tag, PushData };
|
|
|
|
class Assembly;
|
|
|
|
class AssemblyItem
|
|
{
|
|
public:
|
|
enum class JumpType { Ordinary, IntoFunction, OutOfFunction };
|
|
|
|
AssemblyItem(u256 _push, SourceLocation const& _location = SourceLocation()):
|
|
AssemblyItem(Push, _push, _location) { }
|
|
AssemblyItem(Instruction _i, SourceLocation const& _location = SourceLocation()):
|
|
AssemblyItem(Operation, byte(_i), _location) { }
|
|
AssemblyItem(AssemblyItemType _type, u256 _data = 0, SourceLocation const& _location = SourceLocation()):
|
|
m_type(_type),
|
|
m_data(_data),
|
|
m_location(_location)
|
|
{
|
|
}
|
|
|
|
AssemblyItem tag() const { assertThrow(m_type == PushTag || m_type == Tag, Exception, ""); return AssemblyItem(Tag, m_data); }
|
|
AssemblyItem pushTag() const { assertThrow(m_type == PushTag || m_type == Tag, Exception, ""); return AssemblyItem(PushTag, m_data); }
|
|
|
|
AssemblyItemType type() const { return m_type; }
|
|
u256 const& data() const { return m_data; }
|
|
void setType(AssemblyItemType const _type) { m_type = _type; }
|
|
void setData(u256 const& _data) { m_data = _data; }
|
|
|
|
/// @returns the instruction of this item (only valid if type() == Operation)
|
|
Instruction instruction() const { return Instruction(byte(m_data)); }
|
|
|
|
/// @returns true iff the type and data of the items are equal.
|
|
bool operator==(AssemblyItem const& _other) const { return m_type == _other.m_type && m_data == _other.m_data; }
|
|
bool operator!=(AssemblyItem const& _other) const { return !operator==(_other); }
|
|
/// Less-than operator compatible with operator==.
|
|
bool operator<(AssemblyItem const& _other) const { return std::tie(m_type, m_data) < std::tie(_other.m_type, _other.m_data); }
|
|
|
|
/// @returns an upper bound for the number of bytes required by this item, assuming that
|
|
/// the value of a jump tag takes @a _addressLength bytes.
|
|
unsigned bytesRequired(unsigned _addressLength) const;
|
|
int deposit() const;
|
|
|
|
bool match(AssemblyItem const& _i) const { return _i.m_type == UndefinedItem || (m_type == _i.m_type && (m_type != Operation || m_data == _i.m_data)); }
|
|
void setLocation(SourceLocation const& _location) { m_location = _location; }
|
|
SourceLocation const& getLocation() const { return m_location; }
|
|
|
|
void setJumpType(JumpType _jumpType) { m_jumpType = _jumpType; }
|
|
JumpType getJumpType() const { return m_jumpType; }
|
|
std::string getJumpTypeAsString() const;
|
|
|
|
void setPushedValue(u256 const& _value) const { m_pushedValue = std::make_shared<u256>(_value); }
|
|
u256 const* pushedValue() const { return m_pushedValue.get(); }
|
|
|
|
private:
|
|
AssemblyItemType m_type;
|
|
u256 m_data;
|
|
SourceLocation m_location;
|
|
JumpType m_jumpType = JumpType::Ordinary;
|
|
/// Pushed value for operations with data to be determined during assembly stage,
|
|
/// e.g. PushSubSize, PushTag, PushSub, etc.
|
|
mutable std::shared_ptr<u256> m_pushedValue;
|
|
};
|
|
|
|
using AssemblyItems = std::vector<AssemblyItem>;
|
|
using AssemblyItemsConstRef = vector_ref<AssemblyItem const>;
|
|
|
|
std::ostream& operator<<(std::ostream& _out, AssemblyItem const& _item);
|
|
std::ostream& operator<<(std::ostream& _out, AssemblyItemsConstRef _i);
|
|
inline std::ostream& operator<<(std::ostream& _out, AssemblyItems const& _i) { return operator<<(_out, AssemblyItemsConstRef(&_i)); }
|
|
|
|
}
|
|
}
|
|
|