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1311e997d4
This excludes all headers in /usr/include/dev because that directory is bonkers huge (18M). We can add these on an as-needed basis.
58 lines
No EOL
1.5 KiB
C
Vendored
58 lines
No EOL
1.5 KiB
C
Vendored
/* $OpenBSD: tcb.h,v 1.2 2017/01/10 13:13:12 patrick Exp $ */
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/*
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* Copyright (c) 2011 Philip Guenther <guenther@openbsd.org>
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*
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* Permission to use, copy, modify, and 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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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _MACHINE_TCB_H_
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#define _MACHINE_TCB_H_
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#ifdef _KERNEL
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#include <machine/pcb.h>
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static inline void
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__aarch64_set_tcb(void *tcb)
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{
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__asm volatile("msr tpidr_el0, %x0" : : "r" (tcb));
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}
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#define TCB_GET(p) \
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((struct pcb *)(p)->p_addr)->pcb_tcb
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#define TCB_SET(p, addr) \
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do { \
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((struct pcb *)(p)->p_addr)->pcb_tcb = (addr); \
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__aarch64_set_tcb(addr); \
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} while (0)
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#else /* _KERNEL */
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/* ELF TLS ABI calls for small TCB, with static TLS data after it */
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#define TLS_VARIANT 1
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static inline void *
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__aarch64_read_tcb(void)
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{
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void *tcb;
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__asm volatile("mrs %x0, tpidr_el0": "=r" (tcb));
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return tcb;
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}
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#define TCB_GET() __aarch64_read_tcb()
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#endif /* _KERNEL */
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#endif /* _MACHINE_TCB_H_ */ |