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author | chriseth <chris@ethereum.org> | 2017-05-24 01:11:14 +0800 |
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committer | chriseth <chris@ethereum.org> | 2017-05-26 21:03:30 +0800 |
commit | 71b923cc36d33bf3e173f2210b33895df49fcbba (patch) | |
tree | 3575a779eab356c0b84eced5efe8eb3af770aae5 /libjulia/backends/evm/AbstractAssembly.h | |
parent | eaa13d42a09155200127418762940ca652b050c5 (diff) | |
download | dexon-solidity-71b923cc36d33bf3e173f2210b33895df49fcbba.tar.gz dexon-solidity-71b923cc36d33bf3e173f2210b33895df49fcbba.tar.zst dexon-solidity-71b923cc36d33bf3e173f2210b33895df49fcbba.zip |
Move EVM codegen to libjulia.
Diffstat (limited to 'libjulia/backends/evm/AbstractAssembly.h')
-rw-r--r-- | libjulia/backends/evm/AbstractAssembly.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/libjulia/backends/evm/AbstractAssembly.h b/libjulia/backends/evm/AbstractAssembly.h new file mode 100644 index 00000000..e3afa2b6 --- /dev/null +++ b/libjulia/backends/evm/AbstractAssembly.h @@ -0,0 +1,89 @@ +/* + 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 +{ + +class AbstractAssembly +{ +public: + 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(size_t _labelId) = 0; + /// Append a label reference. + virtual void appendLabelReference(size_t _labelId) = 0; + /// Generate a new unique label. + virtual size_t 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; +}; + +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)>; + /// 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; +}; + + + +} +} |