diff options
Diffstat (limited to 'lib/libthr/arch/i386/i386/_setcurthread.c')
| -rw-r--r-- | lib/libthr/arch/i386/i386/_setcurthread.c | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/lib/libthr/arch/i386/i386/_setcurthread.c b/lib/libthr/arch/i386/i386/_setcurthread.c deleted file mode 100644 index d91c64f..0000000 --- a/lib/libthr/arch/i386/i386/_setcurthread.c +++ /dev/null @@ -1,136 +0,0 @@ -/* - * Copyright (c) 2003, Jeffrey Roberson <jeff@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 unmodified, this list of conditions, and the following - * disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. - * - * $FreeBSD$ - */ - -#include <sys/types.h> -#include <sys/ucontext.h> - -#include <pthread.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include <machine/sysarch.h> -#include <machine/segments.h> - -#include "thr_private.h" -#include "rtld_tls.h" - -/* in _curthread.S */ -extern void _set_gs(int); - -struct tcb { - struct tcb *tcb_self; /* required by rtld */ - void *tcb_dtv; /* required by rtld */ - struct pthread *tcb_thread; - int tcb_ldt; -}; - -void -_retire_thread(void *entry) -{ - struct tcb *tcb = (struct tcb *)entry; - - i386_set_ldt(tcb->tcb_ldt, NULL, 1); - _rtld_free_tls(tcb, sizeof(struct tcb), 16); -} - -void * -_set_curthread(ucontext_t *uc, struct pthread *thr, int *err) -{ -#ifndef COMPAT_32BIT - union descriptor desc; -#endif - struct tcb *tcb; - void *oldtls; -#ifndef COMPAT_32BIT - int ldt_index; -#endif - - *err = 0; - - if (uc == NULL && thr->arch_id != NULL) { -#ifdef COMPAT_32BIT - _amd64_set_gsbase(thr->arch_id); -#endif - return (thr->arch_id); - } - - if (uc == NULL) { - __asm __volatile("movl %%gs:0, %0" : "=r" (oldtls)); - } else { - oldtls = NULL; - } - - /* - * Allocate and initialise a new TLS block with enough extra - * space for our self pointer. - */ - tcb = _rtld_allocate_tls(oldtls, sizeof(struct tcb), 16); - - /* - * Cache the address of the thread structure here, after - * rtld's two words of private space. - */ - tcb->tcb_thread = thr; - -#ifndef COMPAT_32BIT - bzero(&desc, sizeof(desc)); - - /* - * Set up the descriptor to point at the TLS block. - */ - desc.sd.sd_lolimit = 0xFFFF; - desc.sd.sd_lobase = (unsigned int)tcb & 0xFFFFFF; - desc.sd.sd_type = SDT_MEMRW; - desc.sd.sd_dpl = SEL_UPL; - desc.sd.sd_p = 1; - desc.sd.sd_hilimit = 0xF; - desc.sd.sd_xx = 0; - desc.sd.sd_def32 = 1; - desc.sd.sd_gran = 1; - desc.sd.sd_hibase = (unsigned int)tcb >> 24; - - /* Get a slot from the process' LDT list */ - ldt_index = i386_set_ldt(LDT_AUTO_ALLOC, &desc, 1); - if (ldt_index == -1) - abort(); - tcb->tcb_ldt = ldt_index; - /* - * Set up our gs with the index into the ldt for this entry. - */ - if (uc != NULL) - uc->uc_mcontext.mc_gs = LSEL(ldt_index, SEL_UPL); - else - _set_gs(LSEL(ldt_index, SEL_UPL)); -#else - if (uc == NULL) - _amd64_set_gsbase(tcb); -#endif - - return (tcb); -} |
