1 /* Copyright (C) 2002, 2003 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <http://www.gnu.org/licenses/>. */ 18 19 /* The "thread register" gets initialized from a segment descriptor. 20 Initialize such a descriptor first. */ 21 #define PREPARE_CREATE \ 22 union user_desc_init desc; \ 23 \ 24 /* Describe the thread-local storage segment. */ \ 25 \ 26 /* The 'entry_number' field. The first three bits of the segment \ 27 register value select the GDT, ignore them. We get the index \ 28 from the value of the %gs register in the current thread. */ \ 29 desc.vals[0] = TLS_GET_GS () >> 3; \ 30 /* The 'base_addr' field. Pointer to the TCB. */ \ 31 desc.vals[1] = (unsigned long int) pd; \ 32 /* The 'limit' field. We use 4GB which is 0xfffff pages. */ \ 33 desc.vals[2] = 0xfffff; \ 34 /* Collapsed value of the bitfield: \ 35 .seg_32bit = 1 \ 36 .contents = 0 \ 37 .read_exec_only = 0 \ 38 .limit_in_pages = 1 \ 39 .seg_not_present = 0 \ 40 .useable = 1 */ \ 41 desc.vals[3] = 0x51 42 43 /* Value passed to 'clone' for initialization of the thread register. */ 44 #define TLS_VALUE &desc.desc 45 46 47 /* Get the real implementation. */ 48 #include <sysdeps/pthread/createthread.c> 49