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OpenCloudOS-Kernel/rust/exports.c

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rust: export generated symbols All symbols are reexported reusing the `EXPORT_SYMBOL_GPL` macro from C. The lists of symbols are generated on the fly. There are three main sets of symbols to distinguish: - The ones from the `core` and `alloc` crates (from the Rust standard library). The code is licensed as Apache/MIT. - The ones from our abstractions in the `kernel` crate. - The helpers (already exported since they are not generated). We export everything as GPL. This ensures we do not mistakenly expose GPL kernel symbols/features as non-GPL, even indirectly. Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Co-developed-by: Alex Gaynor <alex.gaynor@gmail.com> Signed-off-by: Alex Gaynor <alex.gaynor@gmail.com> Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com> Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com> Co-developed-by: Björn Roy Baron <bjorn3_gh@protonmail.com> Signed-off-by: Björn Roy Baron <bjorn3_gh@protonmail.com> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2021-07-03 23:18:23 +08:00
// SPDX-License-Identifier: GPL-2.0
/*
* A hack to export Rust symbols for loadable modules without having to redo
* the entire `include/linux/export.h` logic in Rust.
*
* This requires the Rust's new/future `v0` mangling scheme because the default
* one ("legacy") uses invalid characters for C identifiers (thus we cannot use
* the `EXPORT_SYMBOL_*` macros).
*
* All symbols are exported as GPL-only to guarantee no GPL-only feature is
* accidentally exposed.
*/
#include <linux/module.h>
#define EXPORT_SYMBOL_RUST_GPL(sym) extern int sym; EXPORT_SYMBOL_GPL(sym)
#include "exports_core_generated.h"
#include "exports_alloc_generated.h"
#include "exports_bindings_generated.h"
#include "exports_kernel_generated.h"
rust: add `build_error` crate The `build_error` crate provides a function `build_error` which will panic at compile-time if executed in const context and, by default, will cause a build error if not executed at compile time and the optimizer does not optimise away the call. The `CONFIG_RUST_BUILD_ASSERT_ALLOW` kernel option allows to relax the default build failure and convert it to a runtime check. If the runtime check fails, `panic!` will be called. Its functionality will be exposed to users as a couple macros in the `kernel` crate in the following patch, thus some documentation here refers to them for simplicity. Signed-off-by: Gary Guo <gary@garyguo.net> Reviewed-by: Wei Liu <wei.liu@kernel.org> [Reworded, adapted for upstream and applied latest changes] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-11-11 00:41:37 +08:00
// For modules using `rust/build_error.rs`.
#ifdef CONFIG_RUST_BUILD_ASSERT_ALLOW
EXPORT_SYMBOL_RUST_GPL(rust_build_error);
#endif