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scripts: add `is_rust_module.sh` 

This script is used to detect whether a kernel module is written
in Rust.

It will later be used to disable BTF generation on Rust modules as
BTF does not yet support Rust.

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>
Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
Co-developed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Daniel Xu 2022-08-04 12:55:07 +02:00 committed by Miguel Ojeda
parent 78521f3399
commit e4b69cb9a9
1 changed files with 16 additions and 0 deletions
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16
scripts/is_rust_module.sh Executable file
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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# is_rust_module.sh module.ko
#
# Returns `0` if `module.ko` is a Rust module, `1` otherwise.
set -e
# Using the `16_` prefix ensures other symbols with the same substring
# are not picked up (even if it would be unlikely). The last part is
# used just in case LLVM decides to use the `.` suffix.
#
# In the future, checking for the `.comment` section may be another
# option, see https://github.com/rust-lang/rust/pull/97550.
${NM} "$*" | grep -qE '^[0-9a-fA-F]+ r _R[^[:space:]]+16___IS_RUST_MODULE[^[:space:]]*$'