libucontext/arch/s390x/getcontext.S

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/*
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* Copyright (c) 2018, 2020 Ariadne Conill <ariadne@dereferenced.org>
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*
* 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"
ALIAS(getcontext, libucontext_getcontext)
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ALIAS(__getcontext, libucontext_getcontext)
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FUNC(libucontext_getcontext)
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lgr %r1, %r2 /* use %r1 as our working register */
la %r2, 0 /* we will return 0 */
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stam %a0, %a15, AREG_OFFSET(0)(%r1) /* store access registers */
stmg %r0, %r15, REG_OFFSET(0)(%r1) /* store general-purpose registers */
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br %r14 /* return to where we came from */
END(libucontext_getcontext)