From: Peter Zijlstra <peterz@infradead.org>
Date: Tue, 8 Mar 2022 16:30:15 +0100
Subject: objtool,efi: Update __efi64_thunk annotation
Patch-mainline: v5.18-rc1
Git-commit: 537da1ed54658e916141e50923a7f5b20c728856
References: jsc#PED-1409
The current annotation relies on not running objtool on the file; this
won't work when running objtool on vmlinux.o. Instead explicitly mark
__efi64_thunk() to be ignored.
This preserves the status quo, which is somewhat unfortunate. Luckily
this code is hardly ever used.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220308154317.402118218@infradead.org
Acked-by: Lee, Chun-Yi <jlee@suse.com>
---
arch/x86/platform/efi/Makefile | 1 -
arch/x86/platform/efi/efi_thunk_64.S | 6 ++++--
2 files changed, 4 insertions(+), 3 deletions(-)
--- a/arch/x86/platform/efi/Makefile
+++ b/arch/x86/platform/efi/Makefile
@@ -1,5 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
-OBJECT_FILES_NON_STANDARD_efi_thunk_$(BITS).o := y
KASAN_SANITIZE := n
GCOV_PROFILE := n
--- a/arch/x86/platform/efi/efi_thunk_64.S
+++ b/arch/x86/platform/efi/efi_thunk_64.S
@@ -20,12 +20,14 @@
*/
#include <linux/linkage.h>
+#include <linux/objtool.h>
#include <asm/page_types.h>
#include <asm/segment.h>
.text
.code64
-SYM_CODE_START(__efi64_thunk)
+SYM_FUNC_START(__efi64_thunk)
+STACK_FRAME_NON_STANDARD __efi64_thunk
push %rbp
push %rbx
@@ -79,7 +81,7 @@ SYM_CODE_START(__efi64_thunk)
2: pushl $__KERNEL_CS
pushl %ebp
lret
-SYM_CODE_END(__efi64_thunk)
+SYM_FUNC_END(__efi64_thunk)
.bss
.balign 8