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watchdog/hpwdt: Create stack frame in asminline_call()

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

Create a stack frame when CONFIG_FRAME_POINTER is enabled.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Bernd Petrovitsch <bernd@petrovitsch.priv.at>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Chris J Arges <chris.j.arges@canonical.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Pedro Alves <palves@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: linux-watchdog@vger.kernel.org
Cc: live-patching@vger.kernel.org
Link: http://lkml.kernel.org/r/60de3cfb6f16d413bfb923036cc87fec132df735.1453405861.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Josh Poimboeuf 2016-01-21 16:49:31 -06:00 committed by Ingo Molnar
parent cb7390fed4
commit 5c1d5f283a
1 changed files with 4 additions and 4 deletions
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8
drivers/watchdog/hpwdt.c
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@ -353,10 +353,10 @@ static int detect_cru_service(void)
asm(".text \n\t"
".align 4 \n\t"
".globl asminline_call \n"
".globl asminline_call \n\t"
".type asminline_call, @function \n\t"
"asminline_call: \n\t"
"pushq %rbp \n\t"
"movq %rsp, %rbp \n\t"
FRAME_BEGIN
"pushq %rax \n\t"
"pushq %rbx \n\t"
"pushq %rdx \n\t"
@ -386,7 +386,7 @@ asm(".text \n\t"
"popq %rdx \n\t"
"popq %rbx \n\t"
"popq %rax \n\t"
"leave \n\t"
FRAME_END
"ret \n\t"
".previous");