linux-kernel - [PATCH v8 07/12] unwind_user/sframe/x86: Enable sframe unwinding on x86

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Message-ID: <20250708021159.552828535@kernel.org>
Date: Mon, 07 Jul 2025 22:11:22 -0400
From: Steven Rostedt <rostedt@...nel.org>
To: linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org,
 bpf@...r.kernel.org,
 x86@...nel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Josh Poimboeuf <jpoimboe@...nel.org>,
 Peter Zijlstra <peterz@...radead.org>,
 Ingo Molnar <mingo@...nel.org>,
 Jiri Olsa <jolsa@...nel.org>,
 Namhyung Kim <namhyung@...nel.org>,
 Thomas Gleixner <tglx@...utronix.de>,
 Andrii Nakryiko <andrii@...nel.org>,
 Indu Bhagat <indu.bhagat@...cle.com>,
 "Jose E. Marchesi" <jemarch@....org>,
 Beau Belgrave <beaub@...ux.microsoft.com>,
 Jens Remus <jremus@...ux.ibm.com>,
 Linus Torvalds <torvalds@...ux-foundation.org>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Jens Axboe <axboe@...nel.dk>,
 Florian Weimer <fweimer@...hat.com>,
 Sam James <sam@...too.org>
Subject: [PATCH v8 07/12] unwind_user/sframe/x86: Enable sframe unwinding on x86

From: Josh Poimboeuf <jpoimboe@...nel.org>

The x86 sframe 2.0 implementation works fairly well, starting with
binutils 2.41 (though some bugs are getting fixed in later versions).
Enable it.

Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
 arch/x86/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 17d4094c821b..8a382a6b9be3 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -304,6 +304,7 @@ config X86
 	select HAVE_UNSTABLE_SCHED_CLOCK
 	select HAVE_UNWIND_USER_COMPAT_FP	if IA32_EMULATION
 	select HAVE_UNWIND_USER_FP		if X86_64
+	select HAVE_UNWIND_USER_SFRAME		if X86_64
 	select HAVE_USER_RETURN_NOTIFIER
 	select HAVE_GENERIC_VDSO
 	select VDSO_GETRANDOM			if X86_64
-- 
2.47.2