mirror of
https://codeberg.org/ziglang/zig.git
synced 2026-04-28 19:47:08 +03:00
Alex Rønne Petersen
66d97267c7
This excludes all headers in /usr/include/dev because that directory is bonkers huge (18M). We can add these on an as-needed basis.
66 lines
1.7 KiB
C
Vendored
66 lines
1.7 KiB
C
Vendored
/* $OpenBSD: tcb.h,v 1.4 2017/04/20 16:07:52 visa 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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static inline void
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__mips64_set_tcb(struct proc *p, void *tcb)
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{
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#ifdef CPU_MIPS64R2
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extern int cpu_has_userlocal;
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if (cpu_has_userlocal)
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cp0_set_userlocal(tcb);
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#endif
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p->p_md.md_tcb = tcb;
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}
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#define TCB_SET(p, addr) __mips64_set_tcb(p, addr)
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#define TCB_GET(p) ((p)->p_md.md_tcb)
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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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__mips64_get_tcb(void)
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{
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void *tcb;
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/*
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* This invokes emulation in kernel if the system does not implement
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* the RDHWR instruction or the UserLocal register.
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*/
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__asm__ volatile (
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" .set push\n"
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" .set mips64r2\n"
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" rdhwr %0, $29\n"
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" .set pop\n" : "=r" (tcb));
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return tcb;
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}
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#define TCB_GET() __mips64_get_tcb()
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#endif /* _KERNEL */
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#endif /* _MACHINE_TCB_H_ */ |