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x86/acpi: Support objtool validation in wakeup_64.S

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The OBJECT_FILES_NON_STANDARD annotation is used to tell objtool to
ignore a file.  File-level ignores won't work when validating vmlinux.o.

Instead, tell objtool to ignore do_suspend_lowlevel() directly with the
STACK_FRAME_NON_STANDARD annotation.

Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Len Brown <len.brown@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/269eda576c53bc9ecc8167c211989111013a67aa.1611263462.git.jpoimboe@redhat.com
This commit is contained in:
Josh Poimboeuf 2021-01-21 15:29:33 -06:00
parent f83d1a0190
commit aeb818fcc9
2 changed files with 2 additions and 1 deletions
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1
arch/x86/kernel/acpi/Makefile
View File

@ -1,5 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
OBJECT_FILES_NON_STANDARD_wakeup_$(BITS).o := y
obj-$(CONFIG_ACPI) += boot.o
obj-$(CONFIG_ACPI_SLEEP) += sleep.o wakeup_$(BITS).o

2
arch/x86/kernel/acpi/wakeup_64.S
View File

@ -1,6 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0-only */
.text
#include <linux/linkage.h>
#include <linux/objtool.h>
#include <asm/segment.h>
#include <asm/pgtable_types.h>
#include <asm/page_types.h>
@ -128,6 +129,7 @@ SYM_FUNC_START(do_suspend_lowlevel)
FRAME_END
jmp restore_processor_state
SYM_FUNC_END(do_suspend_lowlevel)
STACK_FRAME_NON_STANDARD do_suspend_lowlevel
.data
saved_rbp: .quad 0