Renaming libjulia to libyul

1 files changed, 97 insertions, 0 deletions

diff --git a/libyul/backends/evm/EVMAssembly.h b/libyul/backends/evm/EVMAssembly.h
new file mode 100644
index 00000000..30abad97
--- /dev/null
+++ b/libyul/backends/evm/EVMAssembly.h
@@ -0,0 +1,97 @@
+/*
+	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/>.
+*/
+/**
+ * Assembly interface for EVM and EVM1.5.
+ */
+
+#pragma once
+
+#include <libyul/backends/evm/AbstractAssembly.h>
+
+#include <libevmasm/LinkerObject.h>
+
+#include <map>
+
+namespace dev
+{
+namespace julia
+{
+
+class EVMAssembly: public AbstractAssembly
+{
+public:
+	explicit EVMAssembly(bool _evm15 = false): m_evm15(_evm15) { }
+	virtual ~EVMAssembly() {}
+
+	/// Set a new source location valid starting from the next instruction.
+	virtual void setSourceLocation(SourceLocation const& _location) override;
+	/// Retrieve the current height of the stack. This does not have to be zero
+	/// at the beginning.
+	virtual int stackHeight() const override { return m_stackHeight; }
+	/// Append an EVM instruction.
+	virtual void appendInstruction(solidity::Instruction _instruction) override;
+	/// Append a constant.
+	virtual void appendConstant(u256 const& _constant) override;
+	/// Append a label.
+	virtual void appendLabel(LabelID _labelId) override;
+	/// Append a label reference.
+	virtual void appendLabelReference(LabelID _labelId) override;
+	/// Generate a new unique label.
+	virtual LabelID newLabelId() override;
+	/// Returns a label identified by the given name. Creates it if it does not yet exist.
+	virtual LabelID namedLabel(std::string const& _name) override;
+	/// Append a reference to a to-be-linked symbol.
+	/// Currently, we assume that the value is always a 20 byte number.
+	virtual void appendLinkerSymbol(std::string const& _name) override;
+
+	/// Append a jump instruction.
+	/// @param _stackDiffAfter the stack adjustment after this instruction.
+	virtual void appendJump(int _stackDiffAfter) override;
+	/// Append a jump-to-immediate operation.
+	virtual void appendJumpTo(LabelID _labelId, int _stackDiffAfter) override;
+	/// Append a jump-to-if-immediate operation.
+	virtual void appendJumpToIf(LabelID _labelId) override;
+	/// Start a subroutine.
+	virtual void appendBeginsub(LabelID _labelId, int _arguments) override;
+	/// Call a subroutine.
+	virtual void appendJumpsub(LabelID _labelId, int _arguments, int _returns) override;
+	/// Return from a subroutine.
+	virtual void appendReturnsub(int _returns, int _stackDiffAfter) override;
+
+	/// Append the assembled size as a constant.
+	virtual void appendAssemblySize() override;
+
+	/// Resolves references inside the bytecode and returns the linker object.
+	eth::LinkerObject finalize();
+
+private:
+	void setLabelToCurrentPosition(AbstractAssembly::LabelID _labelId);
+	void appendLabelReferenceInternal(AbstractAssembly::LabelID _labelId);
+	void updateReference(size_t pos, size_t size, u256 value);
+
+	bool m_evm15 = false; ///< if true, switch to evm1.5 mode
+	LabelID m_nextLabelId = 0;
+	int m_stackHeight = 0;
+	bytes m_bytecode;
+	std::map<std::string, LabelID> m_namedLabels;
+	std::map<LabelID, size_t> m_labelPositions;
+	std::map<size_t, LabelID> m_labelReferences;
+	std::vector<size_t> m_assemblySizePositions;
+};
+
+}
+}