2022-04-19 16:45:52

by Josh Poimboeuf

Subject: [PATCH v2 03/25] x86/static_call: Add ANNOTATE_NOENDBR to static call trampoline

The static call trampoline is never indirect-branched to, but is
referenced by the static call key. Add ANNOTATE_NOENDBR.

Signed-off-by: Josh Poimboeuf <[email protected]>
---
arch/x86/include/asm/static_call.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/x86/include/asm/static_call.h b/arch/x86/include/asm/static_call.h
index 2455d721503e..2d8dacd02643 100644
--- a/arch/x86/include/asm/static_call.h
+++ b/arch/x86/include/asm/static_call.h
@@ -26,6 +26,7 @@
".align 4 \n" \
".globl " STATIC_CALL_TRAMP_STR(name) " \n" \
STATIC_CALL_TRAMP_STR(name) ": \n" \
+ ANNOTATE_NOENDBR \
insns " \n" \
".byte 0x53, 0x43, 0x54 \n" \
".type " STATIC_CALL_TRAMP_STR(name) ", @function \n" \
--
2.34.1

2022-04-22 17:40:17

by tip-bot2 for Zqiang

Subject: [tip: x86/urgent] x86/static_call: Add ANNOTATE_NOENDBR to static call trampoline

The following commit has been merged into the x86/urgent branch of tip:

Commit-ID: 613871cd665ab26290c5ff531dd06c3789d31319
Gitweb: https://git.kernel.org/tip/613871cd665ab26290c5ff531dd06c3789d31319
Author: Josh Poimboeuf <[email protected]>
AuthorDate: Mon, 18 Apr 2022 09:50:22 -07:00
Committer: Peter Zijlstra <[email protected]>
CommitterDate: Tue, 19 Apr 2022 21:58:48 +02:00

x86/static_call: Add ANNOTATE_NOENDBR to static call trampoline

The static call trampoline is never indirect-branched to, but is
referenced by the static call key. Add ANNOTATE_NOENDBR.

Fixes: ed53a0d97192 ("x86/alternative: Use .ibt_endbr_seal to seal indirect calls")
Signed-off-by: Josh Poimboeuf <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Link: https://lkml.kernel.org/r/1b5b54aad7d81241dabe5e0c9b40dea64b540b00.1650300597.git.jpoimboe@redhat.com
---
arch/x86/include/asm/static_call.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/x86/include/asm/static_call.h b/arch/x86/include/asm/static_call.h
index 2455d72..2d8dacd 100644
--- a/arch/x86/include/asm/static_call.h
+++ b/arch/x86/include/asm/static_call.h
@@ -26,6 +26,7 @@
".align 4 \n" \
".globl " STATIC_CALL_TRAMP_STR(name) " \n" \
STATIC_CALL_TRAMP_STR(name) ": \n" \
+ ANNOTATE_NOENDBR \
insns " \n" \
".byte 0x53, 0x43, 0x54 \n" \
".type " STATIC_CALL_TRAMP_STR(name) ", @function \n" \