/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (C) 2003 David Xu <davidxu@freebsd.org>
* Copyright (c) 2001 Daniel Eischen <deischen@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Neither the name of the author nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _MACHINE_TLS_H_
#define _MACHINE_TLS_H_
#include <x86/sysarch.h>
#define TLS_VARIANT_II
struct pthread;
/*
* Variant II tcb, first two members are required by rtld,
* %fs (amd64) / %gs (i386) points to the structure.
*/
struct tcb {
struct tcb *tcb_self; /* required by rtld */
uintptr_t *tcb_dtv; /* required by rtld */
struct pthread *tcb_thread;
};
#define TLS_DTV_OFFSET 0
#ifdef __amd64__
#define TLS_TCB_ALIGN 16
#else
#define TLS_TCB_ALIGN 4
#endif
#define TLS_TCB_SIZE sizeof(struct tcb)
#define TLS_TP_OFFSET 0
static __inline void
_tcb_set(struct tcb *tcb)
{
#ifdef __amd64__
amd64_set_fsbase(tcb);
#else
i386_set_gsbase(tcb);
#endif
}
static __inline struct tcb *
_tcb_get(void)
{
struct tcb *tcb;
#ifdef __amd64__
__asm __volatile("movq %%fs:0, %0" : "=r" (tcb));
#else
__asm __volatile("movl %%gs:0, %0" : "=r" (tcb));
#endif
return (tcb);
}
#endif /* !_MACHINE_TLS_H_ */
plain