diff options
Diffstat (limited to 'libc/arch-x86/bionic/__set_tls.c')
-rwxr-xr-x | libc/arch-x86/bionic/__set_tls.c | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/libc/arch-x86/bionic/__set_tls.c b/libc/arch-x86/bionic/__set_tls.c deleted file mode 100755 index 48b55f0..0000000 --- a/libc/arch-x86/bionic/__set_tls.c +++ /dev/null @@ -1,95 +0,0 @@ -/* - * Copyright (C) 2008 The Android Open Source Project - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * 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 COPYRIGHT HOLDERS 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 - * COPYRIGHT OWNER 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. - */ -#include <pthread.h> - - -struct user_desc { - unsigned int entry_number; - unsigned long base_addr; - unsigned int limit; - unsigned int seg_32bit:1; - unsigned int contents:2; - unsigned int read_exec_only:1; - unsigned int limit_in_pages:1; - unsigned int seg_not_present:1; - unsigned int useable:1; - unsigned int empty:25; -}; - -extern int __set_thread_area(struct user_desc *u_info); - -/* the following can't be const, since the first call will - * update the 'entry_number' field - */ -static struct user_desc _tls_desc = -{ - -1, - 0, - 0x1000, - 1, - 0, - 0, - 1, - 0, - 1, - 0 -}; - -struct _thread_area_head { - void *self; -}; - -/* we implement thread local storage through the gs: segment descriptor - * we create a segment descriptor for the tls - */ -int __set_tls(void *ptr) -{ - int rc, segment; - - _tls_desc.base_addr = (unsigned long)ptr; - - /* We also need to write the location of the tls to ptr[0] */ - ((struct _thread_area_head *)ptr)->self = ptr; - - rc = __set_thread_area( &_tls_desc ); - if (rc != 0) - { - /* could not set thread local area */ - return -1; - } - - /* this weird computation comes from GLibc */ - segment = _tls_desc.entry_number*8 + 3; - asm __volatile__ ( - " movw %w0, %%gs" :: "q"(segment) - ); - return 0; -} - - - |