/* * arch/arm/lib/call_with_stack.S * * Copyright (C) 2011 ARM Ltd. * Written by Will Deacon <will.deacon@arm.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/linkage.h>#include <asm/assembler.h> /* * void call_with_stack(void (*fn)(void *), void *arg, void *sp) * * Change the stack to that pointed at by sp, then invoke fn(arg) with * the new stack. */ENTRY(call_with_stack)	str	sp, [r2, #-4]!	str	lr, [r2, #-4]! 	mov	sp, r2	mov	r2, r0	mov	r0, r1 	badr	lr, 1f	ret	r2 1:	ldr	lr, [sp]	ldr	sp, [sp, #4]	ret	lrENDPROC(call_with_stack)