From: Miguel Ojeda ojeda@kernel.org
maillist inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I5J75G CVE: NA
Reference: https://lore.kernel.org/rust-for-linux/CANiq72nDcJLSB3pLhkdqGdLitfmqqCUVVfkY...
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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.
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 Signed-off-by: Miguel Ojeda ojeda@kernel.org Signed-off-by: Weilong Chen chenweilong@huawei.com --- rust/exports.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 rust/exports.c
diff --git a/rust/exports.c b/rust/exports.c new file mode 100644 index 000000000000..fe3dcfdd6fbf --- /dev/null +++ b/rust/exports.c @@ -0,0 +1,20 @@ +// 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_kernel_generated.h"