Commit 8fcbf024 authored Jul 03, 2021 by Miguel Ojeda

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>

parent 247b365d

rust/exports.c

0 → 100644

+21 −0

Original line number	Diff line number	Diff line
		// 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"