50 lines
1.3 KiB
ArmAsm
50 lines
1.3 KiB
ArmAsm
/*
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* Copyright (c) 2018, 2020 Ariadne Conill <ariadne@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#include "defs.h"
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ALIAS(getcontext, libucontext_getcontext)
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ALIAS(__getcontext, libucontext_getcontext)
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FUNC(libucontext_getcontext)
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/* copy all of the current registers into the ucontext structure */
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add r1, r0, #REG_OFFSET(4)
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stmia r1, {r4-r12}
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str r13, [r0, #REG_OFFSET(13)]
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str r14, [r0, #REG_OFFSET(15)]
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#ifndef FORCE_SOFT_FLOAT
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#ifndef FORCE_HARD_FLOAT
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/* test for vfp, set kernel-defined magic number in uc_regspace */
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push {r0-r1,fp,lr}
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mov r0, #16
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bl getauxval
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tst r0, #64
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pop {r0-r1,fp,lr}
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moveq r2, #0
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ldrne r2, =#0x56465001
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str r2, [r0, #VFP_MAGIC_OFFSET]
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beq 1f
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#endif
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/* if vfp detected, save d8-d15 */
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.fpu vfp
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add r1, r0, #VFP_D8_OFFSET
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vstmia r1, {d8-d15}
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.fpu softvfp
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1:
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#endif
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/* return 0 */
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mov r0, #0
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mov pc, lr
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END(libucontext_getcontext)
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