From: Miguel Ojeda <ojeda@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: rust-for-linux@vger.kernel.org, linux-kbuild@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
Miguel Ojeda <ojeda@kernel.org>,
Alex Gaynor <alex.gaynor@gmail.com>,
Wedson Almeida Filho <wedsonaf@google.com>
Subject: [PATCH 10/19] rust: export generated symbols
Date: Mon, 6 Dec 2021 15:03:04 +0100 [thread overview]
Message-ID: <20211206140313.5653-11-ojeda@kernel.org> (raw)
In-Reply-To: <20211206140313.5653-1-ojeda@kernel.org>
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>
---
rust/exports.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
create mode 100644 rust/exports.c
diff --git a/rust/exports.c b/rust/exports.c
new file mode 100644
index 000000000000..d7dff1b3b919
--- /dev/null
+++ b/rust/exports.c
@@ -0,0 +1,16 @@
+// 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).
+
+#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"
--
2.34.0
next prev parent reply other threads:[~2021-12-06 14:06 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-06 14:02 [PATCH 00/19] Rust support Miguel Ojeda
2021-12-06 14:02 ` [PATCH 01/19] kallsyms: support "big" kernel symbols Miguel Ojeda
2021-12-06 14:18 ` Matthew Wilcox
2021-12-06 17:00 ` Miguel Ojeda
2021-12-06 14:02 ` [PATCH 02/19] kallsyms: increase maximum kernel symbol length to 512 Miguel Ojeda
2021-12-06 14:02 ` [PATCH 03/19] kallsyms: use the correct buffer size for symbols Miguel Ojeda
2021-12-06 14:02 ` [PATCH 04/19] rust: add C helpers Miguel Ojeda
2021-12-06 14:02 ` [PATCH 05/19] rust: add `compiler_builtins` crate Miguel Ojeda
2021-12-07 23:01 ` Nick Desaulniers
2021-12-09 19:34 ` Miguel Ojeda
2021-12-06 14:03 ` [PATCH 07/19] rust: add `build_error` crate Miguel Ojeda
2021-12-06 14:03 ` [PATCH 08/19] rust: add `macros` crate Miguel Ojeda
2021-12-06 14:03 ` Miguel Ojeda [this message]
2021-12-06 14:03 ` [PATCH 11/19] vsprintf: add new `%pA` format specifier Miguel Ojeda
2021-12-06 15:02 ` Greg Kroah-Hartman
2021-12-06 15:56 ` Miguel Ojeda
2021-12-06 16:02 ` Greg Kroah-Hartman
2021-12-06 19:52 ` Nick Desaulniers
2021-12-06 19:55 ` Matthew Wilcox
2021-12-06 20:02 ` Nick Desaulniers
2021-12-06 14:03 ` [PATCH 12/19] scripts: add `generate_rust_analyzer.py` Miguel Ojeda
2021-12-06 14:03 ` [PATCH 13/19] scripts: decode_stacktrace: demangle Rust symbols Miguel Ojeda
2021-12-06 14:03 ` [PATCH 14/19] docs: add Rust documentation Miguel Ojeda
2021-12-08 1:29 ` Nick Desaulniers
2021-12-08 23:07 ` Miguel Ojeda
2021-12-06 14:03 ` [PATCH 15/19] Kbuild: add Rust support Miguel Ojeda
2021-12-07 22:45 ` Nick Desaulniers
2021-12-07 23:21 ` Nick Desaulniers
2021-12-07 23:25 ` Wedson Almeida Filho
2021-12-08 0:05 ` Nick Desaulniers
2021-12-08 22:52 ` Miguel Ojeda
2021-12-11 15:53 ` Masahiro Yamada
2022-01-17 4:45 ` Miguel Ojeda
2021-12-06 14:03 ` [PATCH 16/19] samples: add Rust examples Miguel Ojeda
2021-12-06 14:03 ` [PATCH 17/19] MAINTAINERS: Rust Miguel Ojeda
2021-12-06 14:03 ` [RFC PATCH 18/19] drivers: gpio: PrimeCell PL061 in Rust Miguel Ojeda
[not found] ` <20211206140313.5653-20-ojeda@kernel.org>
2021-12-06 15:01 ` [RFC PATCH 19/19] drivers: android: Binder IPC " Greg Kroah-Hartman
2021-12-06 15:59 ` Wedson Almeida Filho
2021-12-06 16:02 ` Greg Kroah-Hartman
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