140 lines
3.9 KiB
Nim
140 lines
3.9 KiB
Nim
# Nimbus
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# Copyright (c) 2018 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except
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# according to those terms.
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## EVM Opcodes, Definitions
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## ========================
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##
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const
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kludge {.intdefine.}: int = 0
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breakCircularDependency {.used.} = kludge > 0
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import
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../forks_list,
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../op_codes,
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../../memory_defs,
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../../stack_defs,
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eth/common/eth_types
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# ------------------------------------------------------------------------------
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# Kludge BEGIN
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# ------------------------------------------------------------------------------
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when not breakCircularDependency:
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import
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../../v2types
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else:
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{.warning: "Circular dependency breaker kludge -- "&
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"no production code".}
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when defined(vm2_enabled):
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{.fatal: "Flag \"vm2_enabled\" must be unset "&
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"while circular dependency breaker kludge is activated".}
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type
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ReadOnlyStateDB* =
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seq[byte]
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GasMeter* = object
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gasRemaining*: int
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CodeStream* = ref object
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bytes*: seq[byte]
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pc*: int
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BaseVMState* = ref object
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accountDb*: ReadOnlyStateDB
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Message* = ref object
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contractAddress*: EthAddress
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sender*: UInt256
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value*: UInt256
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data*: seq[byte]
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flags*: int
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Computation* = ref object
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returnStack*: seq[int]
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vmState*: BaseVMState
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gasMeter*: GasMeter
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stack*: Stack
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memory*: Memory
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msg*: Message
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code*: CodeStream
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returnData*: seq[byte]
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# ------------------------------------------------------------------------------
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# Kludge END
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# ------------------------------------------------------------------------------
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export
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Op, Fork, Computation, Memory, Stack, UInt256, Message, EthAddress
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type
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Vm2Ctx* = object of RootObj
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cpt*: Computation ## computation text
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rc*: int ## return code from op handler
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Vm2OpFn* = ## general op handler, return codes are passed
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## back via argument descriptor ``k``
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proc(k: Vm2Ctx) {.gcsafe.}
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Vm2OpHanders* = tuple ## three step op code execution, typically
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## only the ``run`` entry is activated
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prep: Vm2OpFn
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run: Vm2OpFn
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post: Vm2OpFn
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Vm2OpExec* = tuple ## op code handler entry
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opCode: Op ## index back-reference
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forks: set[Fork] ## forks applicable for this operation
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info: string ## pretty option name, info
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exec: Vm2OpHanders
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# ------------------------------------------------------------------------------
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# Public
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# ------------------------------------------------------------------------------
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const
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vm2OpIgnore*: Vm2OpFn = ## No operation, placeholder function
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proc(k: Vm2Ctx) {.gcsafe.} =
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discard
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# similar to: toSeq(Fork).mapIt({it}).foldl(a+b)
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Vm2OpAllForks* =
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{Fork.low .. Fork.high}
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Vm2OpHomesteadAndLater* = ## Set of all fork symbols
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Vm2OpAllForks - {FkFrontier}
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Vm2OpTangerineAndLater* = ## Set of fork symbols starting from Homestead
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Vm2OpHomesteadAndLater - {FkHomestead}
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Vm2OpSpuriousAndLater* = ## ditto ...
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Vm2OpTangerineAndLater - {FkTangerine}
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Vm2OpByzantiumAndLater* =
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Vm2OpSpuriousAndLater - {FkSpurious}
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Vm2OpConstantinopleAndLater* =
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Vm2OpByzantiumAndLater - {FkByzantium}
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Vm2OpPetersburgAndLater* =
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Vm2OpConstantinopleAndLater - {FkConstantinople}
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Vm2OpIstanbulAndLater* =
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Vm2OpPetersburgAndLater - {FkPetersburg}
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Vm2OpBerlinAndLater* =
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Vm2OpIstanbulAndLater - {FkIstanbul}
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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