libucontext/arch/arm/setcontext.S

28 lines
883 B
ArmAsm

/*
* Copyright (c) 2018, 2020 Ariadne Conill <ariadne@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"
ALIAS(setcontext, libucontext_setcontext)
ALIAS(__setcontext, libucontext_setcontext)
FUNC(libucontext_setcontext)
/* copy all of the current registers into the ucontext structure */
add r14, r0, #REG_OFFSET(0)
ldmia r14, {r0-r12}
ldr r13, [r14, #52]
add r14, r14, #56
/* load link register and jump to new context */
ldmia r14, {r14, pc}
END(libucontext_setcontext)