Commit f4b19da1 authored Sep 27, 2014 by Behan Webster Committed by Mohan Srinivasan May 24, 2017

UPSTREAM: ARM: 8170/1: Add global named register current_stack_pointer for ARM



Define a global named register for current_stack_pointer. The use of this new
variable guarantees that both gcc and clang can access this register in C code.

Signed-off-by: Behan Webster <behanw@converseincode.com>
Reviewed-by: Jan-Simon Möller <dl9pf@gmx.de>
Reviewed-by: Mark Charlebois <charlebm@gmail.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
(cherry picked from commit 0abc08baf2ddf61a37d375a9fb832be612f9c5a5)
Bug: 29520177
Signed-off-by: Mohan Srinivasan <srmohan@google.com>
Change-Id: I35d828dc5787d5ec698ec4fba5cbc352805f92e8

parent f0d58cdf

arch/arm/include/asm/thread_info.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -81,6 +81,11 @@ struct thread_info {
		#define init_thread_info (init_thread_union.thread_info)
		#define init_stack (init_thread_union.stack)

		/*
		* how to get the current stack pointer in C
		*/
		register unsigned long current_stack_pointer asm ("sp");

		/*
		* how to get the thread information struct from C
		*/