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49 lines
2.1 KiB
C
49 lines
2.1 KiB
C
/* Copyright (C) 2002-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* The "thread register" gets initialized from a segment descriptor.
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Initialize such a descriptor first. */
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#define PREPARE_CREATE \
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union user_desc_init desc; \
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\
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/* Describe the thread-local storage segment. */ \
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\
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/* The 'entry_number' field. The first three bits of the segment \
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register value select the GDT, ignore them. We get the index \
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from the value of the %gs register in the current thread. */ \
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desc.vals[0] = TLS_GET_GS () >> 3; \
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/* The 'base_addr' field. Pointer to the TCB. */ \
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desc.vals[1] = (unsigned long int) pd; \
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/* The 'limit' field. We use 4GB which is 0xfffff pages. */ \
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desc.vals[2] = 0xfffff; \
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/* Collapsed value of the bitfield: \
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.seg_32bit = 1 \
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.contents = 0 \
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.read_exec_only = 0 \
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.limit_in_pages = 1 \
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.seg_not_present = 0 \
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.useable = 1 */ \
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desc.vals[3] = 0x51
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/* Value passed to 'clone' for initialization of the thread register. */
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#define TLS_VALUE &desc.desc
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/* Get the real implementation. */
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#include <nptl/sysdeps/pthread/createthread.c>
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