[tip:x86/debug] x86/asm/acpi: Create a stack frame in do_suspend_lowlevel()

From: tip-bot for Josh Poimboeuf
Date: Thu Feb 25 2016 - 00:57:12 EST


Commit-ID: 13523309495cdbd57a0d344c0d5d574987af007f
Gitweb: http://git.kernel.org/tip/13523309495cdbd57a0d344c0d5d574987af007f
Author: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
AuthorDate: Thu, 21 Jan 2016 16:49:21 -0600
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 24 Feb 2016 08:35:43 +0100

x86/asm/acpi: Create a stack frame in do_suspend_lowlevel()

do_suspend_lowlevel() is a callable non-leaf function which doesn't
honor CONFIG_FRAME_POINTER, which can result in bad stack traces.

Create a stack frame for it when CONFIG_FRAME_POINTER is enabled.

Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Reviewed-by: Borislav Petkov <bp@xxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Bernd Petrovitsch <bernd@xxxxxxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Brian Gerst <brgerst@xxxxxxxxx>
Cc: Chris J Arges <chris.j.arges@xxxxxxxxxxxxx>
Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Jiri Slaby <jslaby@xxxxxxx>
Cc: Len Brown <len.brown@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Michal Marek <mmarek@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxx>
Cc: Pedro Alves <palves@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: live-patching@xxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/7383d87dd40a460e0d757a0793498b9d06a7ee0d.1453405861.git.jpoimboe@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/kernel/acpi/wakeup_64.S | 3 +++
1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S
index 8c35df4..169963f 100644
--- a/arch/x86/kernel/acpi/wakeup_64.S
+++ b/arch/x86/kernel/acpi/wakeup_64.S
@@ -5,6 +5,7 @@
#include <asm/page_types.h>
#include <asm/msr.h>
#include <asm/asm-offsets.h>
+#include <asm/frame.h>

# Copyright 2003 Pavel Machek <pavel@xxxxxxx>, distribute under GPLv2

@@ -39,6 +40,7 @@ bogus_64_magic:
jmp bogus_64_magic

ENTRY(do_suspend_lowlevel)
+ FRAME_BEGIN
subq $8, %rsp
xorl %eax, %eax
call save_processor_state
@@ -109,6 +111,7 @@ ENTRY(do_suspend_lowlevel)

xorl %eax, %eax
addq $8, %rsp
+ FRAME_END
jmp restore_processor_state
ENDPROC(do_suspend_lowlevel)