Blame sysdeps/i386/dl-tls.h

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/* Thread-local storage handling in the ELF dynamic linker.  i386 version.
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   Copyright (C) 2002-2018 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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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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/* Type used for the representation of TLS information in the GOT.  */
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typedef struct dl_tls_index
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{
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  unsigned long int ti_module;
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  unsigned long int ti_offset;
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} tls_index;
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#ifdef SHARED
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/* This is the prototype for the GNU version.  */
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extern void *___tls_get_addr (tls_index *ti)
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     __attribute__ ((__regparm__ (1)));
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extern void *___tls_get_addr_internal (tls_index *ti)
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     __attribute__ ((__regparm__ (1))) attribute_hidden;
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# if IS_IN (rtld)
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/* The special thing about the x86 TLS ABI is that we have two
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   variants of the __tls_get_addr function with different calling
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   conventions.  The GNU version, which we are mostly concerned here,
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   takes the parameter in a register.  The name is changed by adding
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   an additional underscore at the beginning.  The Sun version uses
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   the normal calling convention.  */
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void *
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__tls_get_addr (tls_index *ti)
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{
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  return ___tls_get_addr_internal (ti);
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}
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/* Prepare using the definition of __tls_get_addr in the generic
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   version of this file.  */
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# define __tls_get_addr __attribute__ ((__regparm__ (1))) ___tls_get_addr
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strong_alias (___tls_get_addr, ___tls_get_addr_internal)
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rtld_hidden_proto (___tls_get_addr)
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rtld_hidden_def (___tls_get_addr)
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#else
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/* Users should get the better interface.  */
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# define __tls_get_addr ___tls_get_addr
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# endif
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#endif