libucontext/arch/s390x/setcontext.S

28 lines
871 B
ArmAsm

/*
* Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* This software is provided 'as is' and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising
* from the use of this software.
*/
#include "defs.h"
.globl __setcontext;
__setcontext:
lgr %r1, %r2 /* use %r1 as our working register */
lam %a2, %a15, OFFSET_AREGS+8(%r1) /* load access registers, but skip %a0 and %a1 which are for TLS */
lmg %r0, %r15, OFFSET_GREGS(%r1) /* store general-purpose registers */
br %r14 /* return to new link register address */
.weak setcontext;
setcontext = __setcontext;