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/* $OpenBSD: tcb.h,v 1.2 2016/05/15 23:37:42 guenther Exp $ */
/*
* Copyright (c) 2011 Philip Guenther <guenther@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _MACHINE_TCB_H_
#define _MACHINE_TCB_H_
#ifdef _KERNEL
void *tcb_get(struct proc *_p);
void tcb_set(struct proc *_p, void *_newtcb);
#define TCB_GET(p) tcb_get(p)
#define TCB_SET(p, addr) tcb_set(p, addr)
#else /* _KERNEL */
/* ELF TLS ABI calls for small TCB, with static TLS data after it */
#define TLS_VARIANT 1
static inline void *
__alpha_get_tcb(void)
{
register void *__tmp __asm__("$0");
__asm__ ("call_pal %1 # PAL_rdunique"
: "=r" (__tmp)
: "i" (0x009e /* PAL_rdunique */));
return __tmp;
}
#define TCB_GET() __alpha_get_tcb()
static inline void
__alpha_set_tcb(void *__val)
{
register void *__tmp __asm__("$16") = __val;
__asm__ volatile ("call_pal %1 # PAL_wrunique"
: "=r" (__tmp)
: "i" (0x009f /* PAL_wrunique */), "0" (__tmp));
}
#define TCB_SET(addr) __alpha_set_tcb(addr)
#endif /* _KERNEL */
#endif /* _MACHINE_TCB_H_ */
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