Commit 3337a10e authored Aug 27, 2014 by Behan Webster Committed by Will Deacon Sep 08, 2014

arm64: LLVMLinux: Add current_stack_pointer() for arm64



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>
Reviewed-by: Olof Johansson <olof@lixom.net>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

parent 11d91a77

arch/arm64/include/asm/thread_info.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -68,6 +68,11 @@ 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 from C
		*/
		register unsigned long current_stack_pointer asm ("sp");

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