From: Peter Zijlstra <peterz@infradead.org>
To: Kees Cook <keescook@chromium.org>, linux-kernel@vger.kernel.org
Cc: x86@kernel.org
Subject: lkdtm: Annotate do_nothing()
Date: Mon, 3 Mar 2025 10:38:17 +0100 [thread overview]
Message-ID: <20250303093817.GJ5880@noisy.programming.kicks-ass.net> (raw)
Hi Kees,
During my FineIBT testing the other week I stumbled upon the following
complaint:
vmlinux.o: warning: objtool: execute_location+0x4f: relocation to !ENDBR: .text+0x1032008
I finally got around to looking at it and realized we have means of
annotating that since 93f16a1ab78c ("x86/boot: Mark start_secondary() with __noendbr")
(which might still be in tip only).
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
diff --git a/drivers/misc/lkdtm/perms.c b/drivers/misc/lkdtm/perms.c
index 5b861dbff27e..9600af4494d8 100644
--- a/drivers/misc/lkdtm/perms.c
+++ b/drivers/misc/lkdtm/perms.c
@@ -36,6 +36,7 @@ static noinline void do_nothing(void)
{
return;
}
+ANNOTATE_NOENDBR_SYM(do_nothing);
/* Must immediately follow do_nothing for size calculuations to work out. */
static noinline void do_overwritten(void)
next reply other threads:[~2025-03-03 9:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-03 9:38 Peter Zijlstra [this message]
2025-03-03 17:26 ` Kees Cook
2025-03-03 18:35 ` Peter Zijlstra
2025-03-03 18:37 ` Kees Cook
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