.. py:module:: ethereum.homestead.vm.instructions.system

Ethereum Virtual Machine (EVM) System Instructions
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. contents:: Table of Contents
    :backlinks: none
    :local:

Introduction
------------

Implementations of the EVM system related instructions.


.. only:: stage1

Module Contents
---------------


Functions
~~~~~~~~~

.. autoapisummary::
   :nosignatures:

   ethereum.homestead.vm.instructions.system.create
   ethereum.homestead.vm.instructions.system.return_
   ethereum.homestead.vm.instructions.system.generic_call
   ethereum.homestead.vm.instructions.system.call
   ethereum.homestead.vm.instructions.system.callcode
   ethereum.homestead.vm.instructions.system.selfdestruct
   ethereum.homestead.vm.instructions.system.delegatecall



Module Details
---------------

create
~~~~~~


.. function:: create(evm: ethereum.homestead.vm.Evm) -> None
   :noindexentry:

   Creates a new account with associated code.

   :param evm: The current EVM frame.




.. undocinclude:: /../src/ethereum/homestead/vm/instructions/system.py
   :language: python
   :pyobject: create

return_
~~~~~~~


.. function:: return_(evm: ethereum.homestead.vm.Evm) -> None
   :noindexentry:

   Halts execution returning output data.

   :param evm: The current EVM frame.




.. undocinclude:: /../src/ethereum/homestead/vm/instructions/system.py
   :language: python
   :pyobject: return_

generic_call
~~~~~~~~~~~~


.. function:: generic_call(evm: ethereum.homestead.vm.Evm, gas: ethereum.base_types.Uint, value: ethereum.base_types.U256, caller: ethereum.homestead.eth_types.Address, to: ethereum.homestead.eth_types.Address, code_address: ethereum.homestead.eth_types.Address, should_transfer_value: bool, memory_input_start_position: ethereum.base_types.U256, memory_input_size: ethereum.base_types.U256, memory_output_start_position: ethereum.base_types.U256, memory_output_size: ethereum.base_types.U256) -> None
   :noindexentry:

   Perform the core logic of the `CALL*` family of opcodes.




.. undocinclude:: /../src/ethereum/homestead/vm/instructions/system.py
   :language: python
   :pyobject: generic_call

call
~~~~


.. function:: call(evm: ethereum.homestead.vm.Evm) -> None
   :noindexentry:

   Message-call into an account.

   :param evm: The current EVM frame.




.. undocinclude:: /../src/ethereum/homestead/vm/instructions/system.py
   :language: python
   :pyobject: call

callcode
~~~~~~~~


.. function:: callcode(evm: ethereum.homestead.vm.Evm) -> None
   :noindexentry:

   Message-call into this account with alternative account’s code.

   :param evm: The current EVM frame.




.. undocinclude:: /../src/ethereum/homestead/vm/instructions/system.py
   :language: python
   :pyobject: callcode

selfdestruct
~~~~~~~~~~~~


.. function:: selfdestruct(evm: ethereum.homestead.vm.Evm) -> None
   :noindexentry:

   Halt execution and register account for later deletion.

   :param evm: The current EVM frame.




.. undocinclude:: /../src/ethereum/homestead/vm/instructions/system.py
   :language: python
   :pyobject: selfdestruct

delegatecall
~~~~~~~~~~~~


.. function:: delegatecall(evm: ethereum.homestead.vm.Evm) -> None
   :noindexentry:

   Message-call into an account.

   :param evm: The current EVM frame.




.. undocinclude:: /../src/ethereum/homestead/vm/instructions/system.py
   :language: python
   :pyobject: delegatecall