c7904405a8
In libthr we use PAGE_SIZE when allocating memory with mmap and to check various structs will fit into a single page so we can use this allocator for them. Ask the kernel for the page size on init for use by the page allcator and add a new machine dependent macro to hold the smallest page size the architecture supports to check the structure is small enough. This allows us to use the same libthr on arm64 with either 4k or 16k pages. Reviewed by: kib, markj, imp Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D34984
60 lines
2.0 KiB
C
60 lines
2.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (C) 2003 David Xu <davidxu@freebsd.org>
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* Copyright (c) 2001 Daniel Eischen <deischen@freebsd.org>
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* All rights reserved.
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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. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Machine-dependent thread prototypes/definitions.
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*/
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#ifndef _PTHREAD_MD_H_
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#define _PTHREAD_MD_H_
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#include <stddef.h>
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#include <sys/types.h>
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#include <machine/tls.h>
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#define CPU_SPINWAIT __asm __volatile("pause")
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/* For use in _Static_assert to check structs will fit in a page */
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#define THR_PAGE_SIZE_MIN PAGE_SIZE
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static __inline struct pthread *
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_get_curthread(void)
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{
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struct pthread *thr;
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__asm __volatile("movq %%fs:%1, %0" : "=r" (thr)
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: "m" (*(volatile u_long *)offsetof(struct tcb, tcb_thread)));
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return (thr);
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}
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#define HAS__UMTX_OP_ERR 1
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#endif
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