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304b22d7f97c23b068d8058986a2afc05da17ffc
glibc/include
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Adhemerval Zanella 304b22d7f9 atomic: Consolidate atomic_read_barrier implementation 
All ABIs, except alpha, powerpc, and x86_64, define it to
atomic_full_barrier/__sync_synchronize, which can be mapped to
__atomic_thread_fence (__ATOMIC_SEQ_CST) in most cases, with the
exception of aarch64 (where the acquire fence is generated as
'dmb ishld' instead of 'dmb ish').

For s390x, it defaults to a memory barrier where __sync_synchronize
emits a 'bcr 15,0' (which the manual describes as pipeline
synchronization).

For PowerPC, it allows the use of lwsync for additional chips
(since _ARCH_PWR4 does not cover all chips that support it).

Tested on aarch64-linux-gnu, where the acquire produces a different
instruction that the current code.

Co-authored-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
Reviewed-by: Wilco Dijkstra  <Wilco.Dijkstra@arm.com>
2025-11-04 04:14:01 -03:00
..
arpa
Add _FORTIFY_SOURCE support for inet_pton
2025-03-24 14:43:03 -04:00
bits
Add _FORTIFY_SOURCE support for inet_ntop
2025-03-21 09:35:42 +01:00
gnu
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2025-01-01 11:22:09 -08:00
net
Fix resolver if_* namespace (bug 17717).
2014-12-16 18:18:49 +00:00
netinet
nss_files: Consolidate line parse declarations in <nss_files.h>
2020-07-21 07:33:20 +02:00
programs
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2025-01-01 11:22:09 -08:00
protocols
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rpc
Optimize __libc_tsd_* thread variable access
2025-05-16 19:53:09 +02:00
rpcsvc
Remove --enable-obsolete-nsl configure flag
2020-07-08 17:25:57 +02:00
sys
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2025-01-01 11:22:09 -08:00
aio.h
Linux: Move aio_suspend, aio_suspend64, __aio_suspend_time64 to libc
2021-06-25 11:55:27 +02:00
aliases.h
Move 'aliases' routines from 'inet' into 'nss'
2023-10-24 12:30:59 +02:00
alloc_buffer.h
Update copyright dates with scripts/update-copyrights
2025-01-01 11:22:09 -08:00
alloca.h
elf: early conversion of elf p_flags to mprotect flags
2025-08-27 10:45:45 -03:00
allocate_once.h
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2025-01-01 11:22:09 -08:00
ar.h
Add missing header wrappers under include/
2019-02-16 08:25:16 +01:00
argp-fmtstream.h
argp: Move attribute_hidden to argp-fmtstream.h
2025-10-29 12:54:00 -03:00
argp.h
ldbl-opt: Add argp_error and argp_failure (bug 23983)
2019-03-01 15:21:32 -03:00
argz.h
Use libc_hidden_* for argz_next, __argz_next (bug 15105).
2018-02-15 21:00:02 +00:00
array_length.h
include/array_length.h: add array_foreach[_const] macros
2025-06-17 09:57:40 -03:00
assert.h
assert: Do not use stderr in libc-internal assert
2022-08-03 11:43:04 +02:00
atomic_wide_counter.h
Update copyright dates with scripts/update-copyrights
2025-01-01 11:22:09 -08:00
atomic.h
atomic: Consolidate atomic_read_barrier implementation
2025-11-04 04:14:01 -03:00
byteswap.h
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clone_internal.h
posix: Add pidfd_spawn and pidfd_spawnp (BZ 30349)
2023-09-05 13:08:59 -03:00
complex.h
float128: Add private _Float128 declarations for libm.
2017-05-15 10:23:28 -03:00
cpio.h
Add more headers to include/ for conform tests.
2014-12-11 21:41:30 +00:00
ctype.h
Use proper extern declaration for _nl_C_LC_CTYPE_{class,toupper,tolower}
2025-05-16 19:53:09 +02:00
des.h
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dirent.h
Use 64 bit time_t stat internally
2021-06-22 12:09:52 -03:00
dlfcn.h
elf: Do not add a copy of _dl_find_object to libc.so
2025-02-01 12:37:58 +01:00
dso_handle.h
Mark __dso_handle as hidden [BZ #18822]
2017-09-26 16:53:44 -07:00
elf.h
elf: Add DL_ADDRESS_WITHOUT_RELOC [BZ #33088]
2025-07-01 03:44:52 +08:00
endian.h
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envz.h
Installed header hygiene (BZ#20366): Test of installed headers.
2016-09-23 08:43:56 -04:00
err.h
ldbl-128ibm-compat: PLT redirects for using ldbl redirects internally
2020-03-25 14:34:23 -05:00
errno.h
stdlib: Do not use GLIBC_PRIVATE ABI for errno in libc_nonshared.a
2024-09-06 14:07:00 +02:00
error.h
Mark various cold functions as __COLD
2023-05-01 19:33:21 +02:00
execinfo.h
Installed header hygiene (BZ#20366): Test of installed headers.
2016-09-23 08:43:56 -04:00
fcntl.h
Fix Linux fcntl OFD locks for non-LFS architectures (BZ#20251)
2018-06-26 13:22:53 -03:00
features-time64.h
y2038: Add support for 64-bit time on legacy ABIs
2021-06-15 10:42:11 -03:00
features.h
Disable __USE_EXTERN_INLINES for clang
2025-10-21 09:23:59 -03:00
fenv.h
math: Add fetestexcept internal alias
2025-09-11 14:46:07 -03:00
file_change_detection.h
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2025-01-01 11:22:09 -08:00
filename.h
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2025-01-01 11:22:09 -08:00
float.h
Make totalorder and totalordermag functions take pointer arguments.
2019-08-15 15:18:34 +00:00
fmtmsg.h
Add more headers to include/ for conform tests.
2014-12-11 21:41:30 +00:00
fnmatch.h
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fpu_control.h
Hide internal __setfpucw function [BZ #18822]
2017-10-01 17:52:15 -07:00
fstab.h
Add missing header wrappers under include/
2019-02-16 08:25:16 +01:00
fts.h
io: Add fts64 with 64-bit time_t support
2021-06-15 10:42:11 -03:00
ftw.h
io: Add ftw64 with 64-bit time_t support
2021-06-15 10:42:11 -03:00
gconv.h
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getopt_int.h
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getopt.h
getopt: remove USE_NONOPTION_FLAGS
2017-04-07 07:45:53 -04:00
glob.h
Fix extra PLT reference in libc.so due to __glob64_time64 if build with gcc 7.5 on 32bit.
2021-07-01 16:46:59 +02:00
gmp.h
Apply asm redirection in gmp.h before first use
2022-11-07 10:40:21 -03:00
gnu-versions.h
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2025-01-01 11:22:09 -08:00
grp-merge.h
Remove 'grp' and merge into 'nss' and 'posix'
2023-10-24 12:30:59 +02:00
grp.h
Remove 'grp' and merge into 'nss' and 'posix'
2023-10-24 12:30:59 +02:00
gshadow.h
Remove 'gshadow' and merge into 'nss'
2023-10-24 12:30:59 +02:00
iconv.h
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idx.h
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2025-01-01 11:22:09 -08:00
ifaddrs.h
nscd: Do not rebuild getaddrinfo (bug 30709)
2023-08-11 10:10:16 +02:00
ifreq.h
Hide internal __ifreq function [BZ #18822]
2017-10-01 17:35:46 -07:00
ifunc-impl-list.h
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2025-01-01 11:22:09 -08:00
inline-hashtab.h
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2025-01-01 11:22:09 -08:00
intprops-internal.h
include: Sync gnulib intprops
2025-10-29 12:53:50 -03:00
intprops.h
include: Sync gnulib intprops
2025-10-29 12:53:50 -03:00
inttypes.h
Make strtoimax, strtoumax, wcstoimax, wcstoumax into aliases
2020-12-08 18:15:27 +00:00
langinfo.h
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lastlog.h
Add missing header wrappers under include/
2019-02-16 08:25:16 +01:00
libc-diag.h
Suppress -Wmaybe-uninitialized only for gcc
2025-10-21 09:24:05 -03:00
libc-internal.h
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2025-01-01 11:22:09 -08:00
libc-misc.h
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2025-01-01 11:22:09 -08:00
libc-pointer-arith.h
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2025-01-01 11:22:09 -08:00
libc-symbols.h
elf: Suppress unused function clang warning for __ifunc_resolver
2025-10-21 09:26:04 -03:00
libgen.h
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libintl.h
Document the internal _ and N_ macros
2020-05-06 17:35:40 +02:00
limits.h
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2025-01-01 11:22:09 -08:00
link.h
elf: Restore support for _r_debug interpositions and copy relocations
2025-07-05 20:15:12 +02:00
list_t.h
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2025-01-01 11:22:09 -08:00
list.h
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2025-01-01 11:22:09 -08:00
locale.h
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loop_unroll.h
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2025-01-01 11:22:09 -08:00
malloc.h
Simplify __malloc_initialized
2021-07-22 18:38:04 +05:30
math-narrow-eval.h
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2025-01-01 11:22:09 -08:00
math.h
math: Remove __XXX math functions from installed math.h [BZ #32418]
2024-12-12 16:17:54 +08:00
mcheck.h
mcheck: Wean away from malloc hooks [BZ #23489]
2021-07-22 18:38:02 +05:30
memory.h
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mntent.h
Hide internal __hasmntopt function [BZ #18822]
2017-10-01 17:37:42 -07:00
monetary.h
Rename __LONG_DOUBLE_USES_FLOAT128 to __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI
2020-04-30 08:52:08 -05:00
mqueue.h
Linux: Move mq_send, mq_timedsend, __mq_timedsend_time64 to libc
2021-06-25 12:21:12 +02:00
netdb.h
Move 'netgroup' routines from 'inet' into 'nss'
2023-10-24 12:30:59 +02:00
netgroup.h
Move 'netgroup' routines from 'inet' into 'nss'
2023-10-24 12:30:59 +02:00
nl_types.h
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nss_dns.h
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2025-01-01 11:22:09 -08:00
nss_files.h
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2025-01-01 11:22:09 -08:00
nss.h
nss: Export nscd hash function as __nss_hash [BZ #22459]
2017-11-23 14:08:11 +01:00
nsswitch.h
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obstack.h
Installed header hygiene (BZ#20366): Test of installed headers.
2016-09-23 08:43:56 -04:00
plural-exp.h
Hide internal __gettextparse function [BZ #18822]
2017-10-01 17:31:05 -07:00
poll.h
…
printf_buffer.h
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2025-01-01 11:22:09 -08:00
printf.h
stdio-common: Convert vfprintf and related functions to buffers
2022-12-19 18:56:54 +01:00
pthread.h
Linux: Move mq_notify from librt to libc
2021-06-25 12:20:47 +02:00
pty.h
login: Move libutil into libc
2021-06-30 08:43:37 +02:00
pwd.h
Remove 'pwd' and merge into 'nss'
2023-10-24 12:30:59 +02:00
random-bits.h
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2025-01-01 11:22:09 -08:00
re_comp.h
Add missing header wrappers under include/
2019-02-16 08:25:16 +01:00
regex.h
Fix regex type usage
2023-05-01 09:08:59 -04:00
regexp.h
Add missing header wrappers under include/
2019-02-16 08:25:16 +01:00
register-atfork.h
Update copyright dates with scripts/update-copyrights
2025-01-01 11:22:09 -08:00
resolv.h
resolv: Add internal __res_binary_hnok function
2022-08-30 10:02:49 +02:00
rounding-mode.h
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2025-01-01 11:22:09 -08:00
rtld-malloc.h
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2025-01-01 11:22:09 -08:00
sched.h
Add hidden prototypes for __sched_getparam, __sched_getscheduler
2020-02-20 08:57:01 +01:00
scratch_buffer.h
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2025-01-01 11:22:09 -08:00
search.h
misc: Add twalk_r function
2019-05-02 11:42:51 +02:00
set-freeres.h
elf: Merge __dl_libc_freemem into __rtld_libc_freeres
2025-02-02 20:10:09 +01:00
setjmp.h
support: add check_mem_access function
2025-09-15 09:47:41 +01:00
sgtty.h
…
shadow.h
Remove 'shadow' and merge into 'nss'
2023-10-24 12:30:59 +02:00
shlib-compat.h
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2025-01-01 11:22:09 -08:00
shm-directory.h
shm-directory: Truncated struct member name length
2025-10-01 14:49:10 -03:00
signal.h
stdio: Remove the usage of $(fno-unit-at-a-time) for siglist.c
2022-05-13 10:54:41 -03:00
spawn.h
posix: Use posix_spawn for wordexp
2019-10-09 17:48:41 -03:00
stab.h
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stackinfo.h
elf: early conversion of elf p_flags to mprotect flags
2025-08-27 10:45:45 -03:00
stap-probe.h
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2025-01-01 11:22:09 -08:00
stdbit.h
Implement C23 <stdbit.h>
2024-01-03 12:07:14 +00:00
stdc-predef.h
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2025-01-01 11:22:09 -08:00
stdint.h
Undef __INT64_C/__UINT64_C for glibc build and test
2025-08-22 18:18:38 -07:00
stdio_ext.h
Installed header hygiene (BZ#20366): Test of installed headers.
2016-09-23 08:43:56 -04:00
stdio.h
debug: mark __libc_message_wrapper as always inline
2025-10-31 10:01:33 +00:00
stdlib.h
debug: Improve '%n' fortify detection (BZ 30932)
2025-03-21 15:46:48 -03:00
string.h
Implement C23 memset_explicit (bug 32378)
2025-10-01 15:14:09 +00:00
strings.h
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struct___timeb64.h
time: Add 64-bit time_t support for ftime
2020-10-27 09:54:50 -03:00
struct___timespec64.h
y2038: include: Move struct __timespec64 definition to a separate file
2020-04-06 23:05:11 +02:00
struct___timeval64.h
y2038: include: Move struct __timeval64 definition to a separate file
2020-05-05 19:36:25 +02:00
stubs-prologue.h
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syscall.h
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sysexits.h
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syslog.h
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tar.h
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termios.h
termios: add new baud_t interface, defined to be explicitly numeric
2025-06-17 09:11:38 -03:00
tgmath.h
Don't use glibc <tgmath.h> when testing with Clang
2024-12-21 05:24:07 +08:00
time.h
Define in_int32_t_range to check if the 64 bit time_t syscall should be used
2022-11-17 14:35:13 -03:00
ttyent.h
Installed header hygiene (BZ#20366): Test of installed headers.
2016-09-23 08:43:56 -04:00
uchar.h
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ucontext.h
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ulimit.h
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unistd_ext.h
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2025-01-01 11:22:09 -08:00
unistd.h
io: replace local_isatty() with a proper function __isatty_nostatus()
2025-06-17 09:11:38 -03:00
utime.h
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utmp.h
login: Move libutil into libc
2021-06-30 08:43:37 +02:00
values.h
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2025-01-01 11:22:09 -08:00
verify.h
posix: Sync regex with gnulib
2019-11-06 09:20:52 -03:00
wait.h
Add missing header wrappers under include/
2019-02-16 08:25:16 +01:00
wchar.h
Refer to C23 in place of C2X in glibc
2024-02-01 11:02:01 +00:00
wctype.h
Remove __need macros from stdio.h and wchar.h.
2017-06-08 13:58:17 -04:00
wordexp.h
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