AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-11-26 15:00:06 +00:00
Code Issues Packages Projects Releases Wiki Activity
e740e5b1f0
glibc/sysdeps/generic/dl-dtv.h

39 lines
1.3 KiB
C
Raw Normal View History

elf: Consolidate machine-agnostic DTV definitions in <dl-dtv.h> Identical definitions of dtv_t and TLS_DTV_UNALLOCATED were repeated for all architectures using DTVs.
2016-06-20 12:31:40 +00:00
/* Generic declarations for DTV-based TLS handling in the dynamic linker.
Update copyright dates with scripts/update-copyrights. * All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
2018-01-01 00:32:25 +00:00
Copyright (C) 2002-2018 Free Software Foundation, Inc.
elf: Consolidate machine-agnostic DTV definitions in <dl-dtv.h> Identical definitions of dtv_t and TLS_DTV_UNALLOCATED were repeated for all architectures using DTVs.
2016-06-20 12:31:40 +00:00
This file is part of the GNU C Library.
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/>. */
#ifndef _DL_DTV_H
#define _DL_DTV_H
elf: Avoid using memalign for TLS allocations [BZ #17730] Instead of a flag which indicates the pointer can be freed, dtv_t now includes the pointer which should be freed. Due to padding, the size of dtv_t does not increase. To avoid using memalign, the new allocate_dtv_entry function allocates a sufficiently large buffer so that a sub-buffer can be found in it which starts with an aligned pointer. Both the aligned and original pointers are kept, the latter for calling free later.
2016-08-03 14:15:38 +00:00
struct dtv_pointer
{
void *val; /* Pointer to data, or TLS_DTV_UNALLOCATED. */
void *to_free; /* Unaligned pointer, for deallocation. */
};
elf: Consolidate machine-agnostic DTV definitions in <dl-dtv.h> Identical definitions of dtv_t and TLS_DTV_UNALLOCATED were repeated for all architectures using DTVs.
2016-06-20 12:31:40 +00:00
/* Type for the dtv. */
typedef union dtv
{
size_t counter;
elf: Avoid using memalign for TLS allocations [BZ #17730] Instead of a flag which indicates the pointer can be freed, dtv_t now includes the pointer which should be freed. Due to padding, the size of dtv_t does not increase. To avoid using memalign, the new allocate_dtv_entry function allocates a sufficiently large buffer so that a sub-buffer can be found in it which starts with an aligned pointer. Both the aligned and original pointers are kept, the latter for calling free later.
2016-08-03 14:15:38 +00:00
struct dtv_pointer pointer;
elf: Consolidate machine-agnostic DTV definitions in <dl-dtv.h> Identical definitions of dtv_t and TLS_DTV_UNALLOCATED were repeated for all architectures using DTVs.
2016-06-20 12:31:40 +00:00
} dtv_t;
/* Value used for dtv entries for which the allocation is delayed. */
#define TLS_DTV_UNALLOCATED ((void *) -1l)
#endif /* _DLT_DTV_H */
Reference in New Issue Copy Permalink