1/*- 2 * Copyright (C) 2003 David Xu <davidxu@freebsd.org> 3 * Copyright (c) 2001,2003 Daniel Eischen <deischen@freebsd.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Neither the name of the author nor the names of its contributors 12 * may be used to endorse or promote products derived from this software 13 * without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD$"); 30 31#include <sys/types.h> 32#include <machine/cpufunc.h> 33#include <machine/sysarch.h> 34 35#include <unistd.h> 36#include <signal.h> 37#include <stdlib.h> 38#include <string.h> 39#include <ucontext.h> 40 41#include "rtld_tls.h" 42#include "pthread_md.h" 43 44struct tcb * 45_tcb_ctor(struct pthread *thread, int initial) 46{ 47 struct tcb *tcb; 48 void *oldtls; 49 50 if (initial) { 51 __asm __volatile("movl %%gs:0, %0" : "=r" (oldtls)); 52 } else { 53 oldtls = NULL; 54 } 55 56 tcb = _rtld_allocate_tls(oldtls, sizeof(struct tcb), 16); 57 if (tcb) { 58 tcb->tcb_thread = thread; 59 tcb->tcb_spare = 0; 60 bzero(&tcb->tcb_tmbx, sizeof(tcb->tcb_tmbx)); 61 } 62 63 return (tcb); 64} 65 66void 67_tcb_dtor(struct tcb *tcb) 68{ 69 _rtld_free_tls(tcb, sizeof(struct tcb), 16); 70} 71 72/* 73 * Initialize KSD. This also includes setting up the LDT. 74 */ 75struct kcb * 76_kcb_ctor(struct kse *kse) 77{ 78 struct kcb *kcb; 79 80 kcb = malloc(sizeof(struct kcb)); 81 if (kcb != NULL) { 82 bzero(kcb, sizeof(struct kcb)); 83 kcb->kcb_self = kcb; 84 kcb->kcb_kse = kse; 85 } 86 return (kcb); 87} 88 89void 90_kcb_dtor(struct kcb *kcb) 91{ 92 free(kcb); 93} 94 95int 96i386_set_gsbase(void *addr) 97{ 98 99 return (sysarch(I386_SET_GSBASE, &addr)); 100} 101