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Koute
e349fc9ef8
This PR adds initial support for building RISC-V runtimes targeting PolkaVM. - Setting the `SUBSTRATE_RUNTIME_TARGET=riscv` environment variable will now build a RISC-V runtime instead of a WASM runtime. - This only adds support for *building* runtimes; running them will need a PolkaVM-based executor, which I will add in a future PR. - Only building the minimal runtime is supported (building the Polkadot runtime doesn't work *yet* due to one of the dependencies). - The builder now sets a `substrate_runtime` cfg flag when building the runtimes, with the idea being that instead of doing `#[cfg(not(feature = "std"))]` or `#[cfg(target_arch = "wasm32")]` to detect that we're building a runtime you'll do `#[cfg(substrate_runtime)]`. (Switching the whole codebase to use this will be done in a future PR; I deliberately didn't do this here to keep this PR minimal and reviewable.) - Further renaming of things (e.g. types, environment variables and proc macro attributes having "wasm" in their name) to be target-agnostic will also be done in a future refactoring PR (while keeping backwards compatibility where it makes sense; I don't intend to break anyone's workflow or create unnecessary churn). - This PR also fixes two bugs in the `wasm-builder` crate: * The `RUSTC` environment variable is now removed when invoking the compiler. This prevents the toolchain version from being overridden when called from a `build.rs` script. * When parsing the `rustup toolchain list` output the `(default)` is now properly stripped and not treated as part of the version. - I've also added a minimal CI job that makes sure this doesn't break in the future. (cc @paritytech/ci) cc @athei ------ Also, just a fun little tidbit: quickly comparing the size of the built runtimes it seems that the PolkaVM runtime is slightly smaller than the WASM one. (`production` build, with the `names` section substracted from the WASM's size to keep things fair, since for the PolkaVM runtime we're currently stripping out everything) - `.wasm`: 625505 bytes - `.wasm` (after wasm-opt -O3): 563205 bytes - `.wasm` (after wasm-opt -Os): 562987 bytes - `.wasm` (after wasm-opt -Oz): 536852 bytes - `.polkavm`: ~~580338 bytes~~ 550476 bytes (after enabling extra target features; I'll add those in another PR once we have an executor working) --------- Co-authored-by: Bastian Köcher <git@kchr.de>
31 lines
976 B
Rust
31 lines
976 B
Rust
// This file is part of Substrate.
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// Copyright (C) Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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pub use polkavm_derive::{polkavm_export, polkavm_import};
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#[polkavm_derive::polkavm_define_abi(allow_extra_input_registers)]
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pub mod polkavm_abi {}
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impl self::polkavm_abi::FromHost for *mut u8 {
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type Regs = (u32,);
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#[inline]
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fn from_host((value,): Self::Regs) -> Self {
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value as *mut u8
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}
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}
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