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