x86-32/asm/power: Create stack frames in hibernate_asm_32.S

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swsusp_arch_suspend() is callable non-leaf function which doesn't
honor CONFIG_FRAME_POINTER, which can result in bad stack traces.
Also it's not annotated as ELF callable function which can confuse tooling.

Create a stack frame for it when CONFIG_FRAME_POINTER is enabled and
give it proper ELF function annotation.

Also in this patch introduces the restore_registers() symbol and
gives it ELF function annotation, thus to prepare for later register
restore.

Analogous changes were made for 64bit before in commit ef0f3ed5a4
(x86/asm/power: Create stack frames in hibernate_asm_64.S) and
commit 4ce827b4cc (x86/power/64: Fix hibernation return address
corruption).

Signed-off-by: Zhimin Gu <kookoo.gu@intel.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

...

This commit is contained in:

Zhimin Gu 2018-09-21 14:26:47 +08:00 • committed by Rafael J. Wysocki

parent 749fa17093

commit 8e5b2a3c5a

2 changed files with 13 additions and 0 deletions

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4

arch/x86/include/asm/suspend_32.h

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9

arch/x86/power/hibernate_asm_32.S

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