d915a14ef0
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
81 lines
2.7 KiB
C
81 lines
2.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-NetBSD
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*
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* Copyright (c) 2013 Andrew Turner
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Bases on NetBSD lib/libc/arch/arm/misc/arm_initfini.c
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* $NetBSD: arm_initfini.c,v 1.2 2013/01/31 06:47:55 matt Exp $
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* To properly implement setjmp/longjmp for the ARM AAPCS ABI, it has to be
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* aware of whether there is a FPU is present or not. Regardless of whether
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* the hard-float ABI is being used, setjmp needs to save D8-D15. But it can
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* only do this if those instructions won't cause an exception.
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*/
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <stdbool.h>
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#include <stddef.h>
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extern int __sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp,
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void *newp, size_t newlen);
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int _libc_arm_fpu_present;
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static bool _libc_aapcs_initialized;
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void _libc_aapcs_init(void) __attribute__((__constructor__, __used__));
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void
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_libc_aapcs_init(void)
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{
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int mib[2];
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size_t len;
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if (_libc_aapcs_initialized)
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return;
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mib[0] = CTL_HW;
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mib[1] = HW_FLOATINGPT;
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len = sizeof(_libc_arm_fpu_present);
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if (__sysctl(mib, 2, &_libc_arm_fpu_present, &len, NULL, 0) == -1 ||
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len != sizeof(_libc_arm_fpu_present)) {
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/* sysctl failed, assume no vfp */
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_libc_arm_fpu_present = 0;
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}
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_libc_aapcs_initialized = true;
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}
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