69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
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/* Thread-local storage descriptor handling in the ELF dynamic linker.
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x86_64 version.
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Copyright (C) 2005-2022 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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<https://www.gnu.org/licenses/>. */
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#include <stdint.h>
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#ifndef _X86_64_DL_TLSDESC_H
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# define _X86_64_DL_TLSDESC_H 1
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/* Type used to represent a TLS descriptor in the GOT. */
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struct tlsdesc
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{
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/* Anonymous union is used here to ensure that GOT entry slot is always
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8 bytes for both x32 and x86-64. */
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union
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{
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ptrdiff_t (*entry) (struct tlsdesc *on_rax);
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uint64_t entry_slot;
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};
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union
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{
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void *arg;
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uint64_t arg_slot;
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};
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};
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typedef struct dl_tls_index
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{
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uint64_t ti_module;
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uint64_t ti_offset;
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} tls_index;
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/* Type used as the argument in a TLS descriptor for a symbol that
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needs dynamic TLS offsets. */
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struct tlsdesc_dynamic_arg
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{
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tls_index tlsinfo;
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size_t gen_count;
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};
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extern ptrdiff_t attribute_hidden
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_dl_tlsdesc_return(struct tlsdesc *on_rax),
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_dl_tlsdesc_undefweak(struct tlsdesc *on_rax);
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# ifdef SHARED
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extern void *_dl_make_tlsdesc_dynamic (struct link_map *map,
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size_t ti_offset)
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attribute_hidden;
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extern ptrdiff_t attribute_hidden _dl_tlsdesc_dynamic(struct tlsdesc *);
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# endif
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#endif
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