mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
118 lines
4.3 KiB
C++
118 lines
4.3 KiB
C++
/*
|
|
This file is part of solidity.
|
|
|
|
solidity 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.
|
|
|
|
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/**
|
|
* @date 2017
|
|
* Abstract assembly interface, subclasses of which are to be used with the generic
|
|
* bytecode generator.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <libdevcore/CommonData.h>
|
|
|
|
#include <functional>
|
|
|
|
namespace dev
|
|
{
|
|
struct SourceLocation;
|
|
namespace solidity
|
|
{
|
|
enum class Instruction: uint8_t;
|
|
namespace assembly
|
|
{
|
|
struct Instruction;
|
|
struct Identifier;
|
|
}
|
|
}
|
|
namespace julia
|
|
{
|
|
|
|
///
|
|
/// Assembly class that abstracts both the libevmasm assembly and the new julia evm assembly.
|
|
///
|
|
class AbstractAssembly
|
|
{
|
|
public:
|
|
using LabelID = size_t;
|
|
|
|
virtual ~AbstractAssembly() {}
|
|
|
|
/// Set a new source location valid starting from the next instruction.
|
|
virtual void setSourceLocation(SourceLocation const& _location) = 0;
|
|
/// Retrieve the current height of the stack. This does not have to be zero
|
|
/// at the beginning.
|
|
virtual int stackHeight() const = 0;
|
|
/// Append an EVM instruction.
|
|
virtual void appendInstruction(solidity::Instruction _instruction) = 0;
|
|
/// Append a constant.
|
|
virtual void appendConstant(u256 const& _constant) = 0;
|
|
/// Append a label.
|
|
virtual void appendLabel(LabelID _labelId) = 0;
|
|
/// Append a label reference.
|
|
virtual void appendLabelReference(LabelID _labelId) = 0;
|
|
/// Generate a new unique label.
|
|
virtual LabelID newLabelId() = 0;
|
|
/// Append a reference to a to-be-linked symobl.
|
|
/// Currently, we assume that the value is always a 20 byte number.
|
|
virtual void appendLinkerSymbol(std::string const& _name) = 0;
|
|
|
|
/// Append a jump instruction.
|
|
/// @param _stackDiffAfter the stack adjustment after this instruction.
|
|
/// This is helpful to stack height analysis if there is no continuing control flow.
|
|
virtual void appendJump(int _stackDiffAfter) = 0;
|
|
|
|
/// Append a jump-to-immediate operation.
|
|
/// @param _stackDiffAfter the stack adjustment after this instruction.
|
|
virtual void appendJumpTo(LabelID _labelId, int _stackDiffAfter = 0) = 0;
|
|
/// Append a jump-to-if-immediate operation.
|
|
virtual void appendJumpToIf(LabelID _labelId) = 0;
|
|
/// Start a subroutine identified by @a _labelId that takes @a _arguments
|
|
/// stack slots as arguments.
|
|
virtual void appendBeginsub(LabelID _labelId, int _arguments) = 0;
|
|
/// Call a subroutine identified by @a _labelId, taking @a _arguments from the
|
|
/// stack upon call and putting @a _returns arguments onto the stack upon return.
|
|
virtual void appendJumpsub(LabelID _labelId, int _arguments, int _returns) = 0;
|
|
/// Return from a subroutine.
|
|
/// @param _stackDiffAfter the stack adjustment after this instruction.
|
|
virtual void appendReturnsub(int _returns, int _stackDiffAfter = 0) = 0;
|
|
|
|
/// Append the assembled size as a constant.
|
|
virtual void appendAssemblySize() = 0;
|
|
};
|
|
|
|
enum class IdentifierContext { LValue, RValue };
|
|
|
|
/// Object that is used to resolve references and generate code for access to identifiers external
|
|
/// to inline assembly (not used in standalone assembly mode).
|
|
struct ExternalIdentifierAccess
|
|
{
|
|
using Resolver = std::function<size_t(solidity::assembly::Identifier const&, IdentifierContext, bool /*_crossesFunctionBoundary*/)>;
|
|
/// Resolve a an external reference given by the identifier in the given context.
|
|
/// @returns the size of the value (number of stack slots) or size_t(-1) if not found.
|
|
Resolver resolve;
|
|
using CodeGenerator = std::function<void(solidity::assembly::Identifier const&, IdentifierContext, julia::AbstractAssembly&)>;
|
|
/// Generate code for retrieving the value (rvalue context) or storing the value (lvalue context)
|
|
/// of an identifier. The code should be appended to the assembly. In rvalue context, the value is supposed
|
|
/// to be put onto the stack, in lvalue context, the value is assumed to be at the top of the stack.
|
|
CodeGenerator generateCode;
|
|
};
|
|
|
|
|
|
|
|
}
|
|
}
|