linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
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,
	Jarkko Sakkinen <jarkko@kernel.org>,
	Miguel Ojeda <ojeda@kernel.org>,
	Alex Gaynor <alex.gaynor@gmail.com>,
	Wedson Almeida Filho <wedsonaf@google.com>
Subject: [PATCH v7 13/25] rust: export generated symbols
Date: Mon, 23 May 2022 04:01:26 +0200	[thread overview]
Message-ID: <20220523020209.11810-14-ojeda@kernel.org> (raw)
In-Reply-To: <20220523020209.11810-1-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 | 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"
-- 
2.36.1


  parent reply	other threads:[~2022-05-23  2:05 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-23  2:01 [PATCH v7 00/25] Rust support Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 01/25] kallsyms: avoid hardcoding the buffer size Miguel Ojeda
2022-05-23 19:45   ` Jarkko Sakkinen
2022-05-23 19:55     ` Jarkko Sakkinen
2022-05-24 16:21     ` Miguel Ojeda
2022-05-26  4:54       ` Jarkko Sakkinen
2022-05-23  2:01 ` [PATCH v7 02/25] kallsyms: support "big" kernel symbols Miguel Ojeda
2022-05-23 20:30   ` Jarkko Sakkinen
2022-05-23  2:01 ` [PATCH v7 03/25] kallsyms: increase maximum kernel symbol length to 512 Miguel Ojeda
2022-05-23 20:31   ` Jarkko Sakkinen
2022-05-24 18:07     ` Miguel Ojeda
2022-05-27 16:25       ` Jarkko Sakkinen
2022-05-30 13:01         ` Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 04/25] kunit: take `kunit_assert` as `const` Miguel Ojeda
2022-05-23 17:15   ` Daniel Latypov
2022-05-23 18:14     ` Shuah Khan
2022-05-24 12:37       ` Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 05/25] rust: add C helpers Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 06/25] rust: add `compiler_builtins` crate Miguel Ojeda
2022-05-23 18:37   ` Nick Desaulniers
2022-05-23 23:41     ` Gary Guo
2022-05-25 21:29       ` Nick Desaulniers
2022-05-24 12:29     ` Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 07/25] rust: import upstream `alloc` crate Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 08/25] rust: adapt `alloc` crate to the kernel Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 09/25] rust: add `build_error` crate Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 10/25] rust: add `macros` crate Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 11/25] rust: add `kernel` crate's `sync` module Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 12/25] rust: add `kernel` crate Miguel Ojeda
2022-05-23  2:01 ` Miguel Ojeda [this message]
2022-05-23  2:01 ` [PATCH v7 14/25] vsprintf: add new `%pA` format specifier Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 15/25] scripts: checkpatch: diagnose uses of `%pA` in the C side Miguel Ojeda
2022-05-23  2:17   ` Joe Perches
2022-05-24 16:35     ` Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 16/25] scripts: checkpatch: enable language-independent checks for Rust Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 17/25] scripts: add `rustdoc_test_{builder,gen}.py` scripts Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 18/25] scripts: add `generate_rust_analyzer.py` scripts Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 19/25] scripts: decode_stacktrace: demangle Rust symbols Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 20/25] docs: add Rust documentation Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 21/25] Kbuild: add Rust support Miguel Ojeda
2022-05-23 18:44   ` Nick Desaulniers
2022-05-24 15:12     ` Miguel Ojeda
2022-05-25 22:25   ` Nick Desaulniers
2022-05-30 13:39     ` Miguel Ojeda
2022-07-16  8:21   ` Masahiro Yamada
2022-07-16  8:57     ` Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 22/25] samples: add Rust examples Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 23/25] MAINTAINERS: Rust Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 24/25] [RFC] drivers: gpio: PrimeCell PL061 in Rust Miguel Ojeda
2022-05-23  2:01 ` [PATCH v7 25/25] [RFC] drivers: android: Binder IPC " Miguel Ojeda
2022-07-16 12:42 ` [PATCH v7 00/25] Rust support Conor Dooley
2022-07-16 13:36   ` Miguel Ojeda
2022-07-16 13:51     ` Conor.Dooley
2022-07-16 13:56       ` Miguel Ojeda

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20220523020209.11810-14-ojeda@kernel.org \
    --to=ojeda@kernel.org \
    --cc=alex.gaynor@gmail.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=jarkko@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=rust-for-linux@vger.kernel.org \
    --cc=torvalds@linux-foundation.org \
    --cc=wedsonaf@google.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).