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linux/tools/objtool
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Miguel Ojeda 19f5ca461d objtool/rust: add one more noreturn Rust function for Rust 1.87.0 
Starting with Rust 1.87.0 (expected 2025-05-15), `objtool` may report:

    rust/core.o: warning: objtool: _R..._4core9panicking9panic_fmt() falls
    through to next function _R..._4core9panicking18panic_nounwind_fmt()

    rust/core.o: warning: objtool: _R..._4core9panicking18panic_nounwind_fmt()
    falls through to next function _R..._4core9panicking5panic()

The reason is that `rust_begin_unwind` is now mangled:

    _R..._7___rustc17rust_begin_unwind

Thus add the mangled one to the list so that `objtool` knows it is
actually `noreturn`.

See commit 56d680dd23 ("objtool/rust: list `noreturn` Rust functions")
for more details.

Alternatively, we could remove the fixed one in `noreturn.h` and relax
this test to cover both, but it seems best to be strict as long as we can.

Cc: stable@vger.kernel.org # Needed in 6.12.y and later (Rust is pinned in older LTSs).
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20250502140237.1659624-2-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2025-05-07 00:08:51 +02:00
..
arch objtool: Fix false-positive "ignoring unreachables" warning 2025-04-10 22:55:00 +02:00
Documentation objtool: Fix up some outdated references to ENTRY/ENDPROC 2025-03-25 09:20:27 +01:00
include/objtool objtool: Split INSN_CONTEXT_SWITCH into INSN_SYSCALL and INSN_SYSRET 2025-04-08 09:14:11 +02:00
.gitignore
Build
builtin-check.c objtool: Change "warning:" to "error: " for fatal errors 2025-04-01 09:07:13 +02:00
check.c objtool/rust: add one more noreturn Rust function for Rust 1.87.0 2025-05-07 00:08:51 +02:00
elf.c objtool: Change "warning:" to "error: " for fatal errors 2025-04-01 09:07:13 +02:00
Makefile objtool: Hide unnecessary compiler error message 2025-03-12 15:43:38 -07:00
noreturns.h Merge branch 'x86/urgent' into x86/cpu, to pick up dependent commits 2025-03-04 11:15:26 +01:00
objtool.c objtool: Change "warning:" to "error: " for fatal errors 2025-04-01 09:07:13 +02:00
orc_dump.c objtool: Change "warning:" to "error: " for fatal errors 2025-04-01 09:07:13 +02:00
orc_gen.c
special.c objtool: Change "warning:" to "error: " for fatal errors 2025-04-01 09:07:13 +02:00
sync-check.sh
weak.c