1 /* $OpenBSD: tcb.h,v 1.4 2020/07/14 16:48:13 kettenis Exp $ */ 2 3 /* 4 * Copyright (c) 2011 Philip Guenther <guenther@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #ifndef _MACHINE_TCB_H_ 20 #define _MACHINE_TCB_H_ 21 22 #ifdef _KERNEL 23 24 #define TCB_GET(p) \ 25 ((void *)(p)->p_md.md_regs->fixreg[13]) 26 #define TCB_SET(p, addr) \ 27 ((p)->p_md.md_regs->fixreg[13] = (__register_t)(addr)) 28 29 #else /* _KERNEL */ 30 31 /* ELF TLS ABI calls for small TCB, with static TLS data after it */ 32 #define TLS_VARIANT 1 33 34 /* powerpc offsets the TCB pointer 0x7000 bytes after the data */ 35 #define TCB_OFFSET 0x7008 36 37 register void *__tcb __asm__ ("r13"); 38 #define TCB_GET() (__tcb) 39 #define TCB_SET(tcb) ((__tcb) = (tcb)) 40 41 #endif /* _KERNEL */ 42 #endif /* _MACHINE_TCB_H_ */ 43