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34 lines
937 B
ArmAsm
34 lines
937 B
ArmAsm
/* See the end of this file for copyright, license, and warranty information. */
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.include "asm.S"
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.text
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/* void _do_switch(struct context *old, struct context *new); */
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func_begin _do_switch
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/* ldm/stm can't use sp in the reglist, we need to store it individually */
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stmia r0!, {r4-r11}
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str sp, [r0]
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str lr, [r0, #4] /* this becomes pc when we are switched back to */
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ldmia r1!, {r4-r11}
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ldr sp, [r1]
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ldr pc, [r1, #4] /* this is the lr that we stored */
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func_end _do_switch
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/*
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* This file is part of Ardix.
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* Copyright (c) 2020, 2021 Felix Kopp <owo@fef.moe>.
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*
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* Ardix is non-violent software: you may only use, redistribute,
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* and/or modify it under the terms of the CNPLv6+ as found in
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* the LICENSE file in the source code root directory or at
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* <https://git.pixie.town/thufie/CNPL>.
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*
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* Ardix comes with ABSOLUTELY NO WARRANTY, to the extent
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* permitted by applicable law. See the CNPLv6+ for details.
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*/
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