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-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, patches@lists.linux.dev,
"Jarkko Sakkinen" <jarkko@kernel.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Wedson Almeida Filho" <wedsonaf@google.com>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>
Subject: [PATCH v9 13/27] rust: export generated symbols
Date: Fri, 5 Aug 2022 17:41:58 +0200 [thread overview]
Message-ID: <20220805154231.31257-14-ojeda@kernel.org> (raw)
In-Reply-To: <20220805154231.31257-1-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>
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>
---
rust/exports.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
create mode 100644 rust/exports.c
diff --git a/rust/exports.c b/rust/exports.c
new file mode 100644
index 000000000000..bb7cc64cecd0
--- /dev/null
+++ b/rust/exports.c
@@ -0,0 +1,21 @@
+// 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"
--
2.37.1
next prev parent reply other threads:[~2022-08-05 15:47 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-05 15:41 [PATCH v9 00/27] Rust support Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 01/27] kallsyms: use `sizeof` instead of hardcoded size Miguel Ojeda
2022-08-05 16:48 ` Geert Stappers
2022-08-05 18:46 ` Miguel Ojeda
2022-08-05 22:40 ` Konstantin Shelekhin
2022-08-17 19:36 ` Kees Cook
2022-08-18 9:03 ` Konstantin Shelekhin
2022-08-18 16:03 ` Kees Cook
2022-09-27 12:48 ` Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 02/27] kallsyms: avoid hardcoding buffer size Miguel Ojeda
2022-08-17 19:37 ` Kees Cook
2022-08-18 16:50 ` Geert Stappers
2022-08-05 15:41 ` [PATCH v9 03/27] kallsyms: add static relationship between `KSYM_NAME_LEN{,_BUFFER}` Miguel Ojeda
2022-08-17 19:39 ` Kees Cook
2022-08-17 19:50 ` Boqun Feng
2022-08-17 20:31 ` Kees Cook
2022-08-17 20:45 ` Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 04/27] kallsyms: support "big" kernel symbols Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 05/27] kallsyms: increase maximum kernel symbol length to 512 Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 06/27] rust: add C helpers Miguel Ojeda
2022-08-17 19:44 ` Kees Cook
2022-08-17 20:22 ` Miguel Ojeda
2022-08-17 20:34 ` Kees Cook
2022-08-17 21:44 ` Miguel Ojeda
2022-08-17 23:56 ` Kees Cook
2022-08-18 16:03 ` Miguel Ojeda
2022-08-18 16:08 ` Kees Cook
2022-08-18 17:01 ` Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 07/27] rust: import upstream `alloc` crate Miguel Ojeda
2022-08-17 20:07 ` Kees Cook
2022-08-17 21:00 ` Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 08/27] rust: adapt `alloc` crate to the kernel Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 09/27] rust: add `compiler_builtins` crate Miguel Ojeda
2022-08-17 20:08 ` Kees Cook
2022-08-22 23:55 ` Nick Desaulniers
2022-08-24 18:38 ` Nick Desaulniers
2022-08-29 17:11 ` Gary Guo
2022-08-05 15:41 ` [PATCH v9 10/27] rust: add `macros` crate Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 11/27] rust: add `bindings` crate Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 12/27] rust: add `kernel` crate Miguel Ojeda
2022-08-06 10:24 ` Konstantin Shelekhin
2022-08-06 11:22 ` Miguel Ojeda
2022-08-06 12:15 ` Konstantin Shelekhin
2022-08-06 14:57 ` Matthew Wilcox
2022-09-19 14:07 ` Wedson Almeida Filho
2022-09-19 16:09 ` Linus Torvalds
2022-09-19 17:20 ` Linus Torvalds
2022-09-19 18:05 ` Wedson Almeida Filho
2022-09-19 20:42 ` Linus Torvalds
2022-09-19 22:35 ` Wedson Almeida Filho
2022-09-19 23:39 ` Linus Torvalds
2022-09-19 23:50 ` Alex Gaynor
2022-09-19 23:58 ` Linus Torvalds
2022-09-20 0:15 ` Linus Torvalds
2022-09-20 15:55 ` Eric W. Biederman
2022-09-20 22:39 ` Gary Guo
2022-09-21 6:42 ` comex
2022-09-21 14:19 ` Boqun Feng
2022-10-03 2:03 ` comex
2022-09-20 0:40 ` Boqun Feng
2022-10-03 4:17 ` Kyle Strand
2022-09-20 0:41 ` Wedson Almeida Filho
2022-09-21 11:23 ` Konstantin Shelekhin
2022-09-21 11:46 ` Greg KH
2022-08-05 15:41 ` Miguel Ojeda [this message]
2022-08-17 20:11 ` [PATCH v9 13/27] rust: export generated symbols Kees Cook
2022-08-05 15:41 ` [PATCH v9 14/27] vsprintf: add new `%pA` format specifier Miguel Ojeda
2022-08-05 15:42 ` [PATCH v9 15/27] scripts: checkpatch: diagnose uses of `%pA` in the C side as errors Miguel Ojeda
2022-08-05 15:42 ` [PATCH v9 16/27] scripts: checkpatch: enable language-independent checks for Rust Miguel Ojeda
2022-08-17 20:12 ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 17/27] scripts: decode_stacktrace: demangle Rust symbols Miguel Ojeda
2022-08-05 15:42 ` [PATCH v9 18/27] scripts: add `generate_rust_analyzer.py` Miguel Ojeda
2022-08-17 20:13 ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 19/27] scripts: add `generate_rust_target.rs` Miguel Ojeda
2022-08-17 20:14 ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 20/27] scripts: add `rust_is_available.sh` Miguel Ojeda
2022-08-17 20:18 ` Kees Cook
2022-08-17 20:40 ` Miguel Ojeda
2022-08-22 20:09 ` Nick Desaulniers
2022-08-23 12:12 ` Miguel Ojeda
2022-08-23 12:16 ` Miguel Ojeda
2022-08-05 15:42 ` [PATCH v9 21/27] scripts: add `is_rust_module.sh` Miguel Ojeda
2022-08-17 20:19 ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 22/27] rust: add `.rustfmt.toml` Miguel Ojeda
2022-08-17 20:19 ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 23/27] Kbuild: add Rust support Miguel Ojeda
2022-08-17 20:26 ` Kees Cook
2022-08-17 20:56 ` Miguel Ojeda
2022-08-22 22:35 ` Nick Desaulniers
2022-09-12 16:07 ` Masahiro Yamada
2022-09-12 16:18 ` Miguel Ojeda
2022-09-13 6:37 ` Masahiro Yamada
2022-08-05 15:42 ` [PATCH v9 24/27] docs: add Rust documentation Miguel Ojeda
2022-08-05 15:42 ` [PATCH v9 25/27] x86: enable initial Rust support Miguel Ojeda
2022-08-17 20:27 ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 26/27] samples: add first Rust examples Miguel Ojeda
2022-08-06 13:14 ` Konstantin Shelekhin
2022-08-17 21:02 ` Miguel Ojeda
2022-08-18 9:04 ` Konstantin Shelekhin
2022-08-17 20:28 ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 27/27] MAINTAINERS: Rust Miguel Ojeda
2022-08-17 20:28 ` Kees Cook
2022-08-17 20:43 ` Miguel Ojeda
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