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glibc/sysdeps/generic
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Florian Weimer 627f5ede70 Remove TLS_TCB_ALIGN and TLS_INIT_TCB_ALIGN 
TLS_INIT_TCB_ALIGN is not actually used.  TLS_TCB_ALIGN was likely
introduced to support a configuration where the thread pointer
has not the same alignment as THREAD_SELF.  Only ia64 seems to use
that, but for the stack/pointer guard, not for storing tcbhead_t.
Some ports use TLS_TCB_OFFSET and TLS_PRE_TCB_SIZE to shift
the thread pointer, potentially landing in a different residue class
modulo the alignment, but the changes should not impact that.

In general, given that TLS variables have their own alignment
requirements, having different alignment for the (unshifted) thread
pointer and struct pthread would potentially result in dynamic
offsets, leading to more complexity.

hppa had different values before: __alignof__ (tcbhead_t), which
seems to be 4, and __alignof__ (struct pthread), which was 8
(old default) and is now 32.  However, it defines THREAD_SELF as:

/* Return the thread descriptor for the current thread.  */
# define THREAD_SELF \
  ({ struct pthread *__self;			\
	__self = __get_cr27();			\
	__self - 1;				\
   })

So the thread pointer points after struct pthread (hence __self - 1),
and they have to have the same alignment on hppa as well.

Similarly, on ia64, the definitions were different.  We have:

# define TLS_PRE_TCB_SIZE \
  (sizeof (struct pthread)						\
   + (PTHREAD_STRUCT_END_PADDING < 2 * sizeof (uintptr_t)		\
      ? ((2 * sizeof (uintptr_t) + __alignof__ (struct pthread) - 1)	\
	 & ~(__alignof__ (struct pthread) - 1))				\
      : 0))
# define THREAD_SELF \
  ((struct pthread *) ((char *) __thread_self - TLS_PRE_TCB_SIZE))

And TLS_PRE_TCB_SIZE is a multiple of the struct pthread alignment
(confirmed by the new _Static_assert in sysdeps/ia64/libc-tls.c).

On m68k, we have a larger gap between tcbhead_t and struct pthread.
But as far as I can tell, the port is fine with that.  The definition
of TCB_OFFSET is sufficient to handle the shifted TCB scenario.

This fixes commit 23c77f6018
("nptl: Increase default TCB alignment to 32").

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2021-12-09 23:47:49 +01:00
..
net Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
netinet Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
nfs Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sys Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
_G_config.h
_itoa.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
a.out.h
abort-instr.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
adaptive_spin_count.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
aio_misc.h Linux: Cleanups after librt move 2021-06-28 09:51:01 +02:00
allocalim.h
arch-fd_to_filename.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
asm-syntax.h
atomic-machine.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
c++-types.data
confstr.h
crti.S Introduce <elf-initfini.h> and ELF_INITFINI for all architectures 2020-02-18 15:12:25 +01:00
crtn.S Introduce <elf-initfini.h> and ELF_INITFINI for all architectures 2020-02-18 15:12:25 +01:00
device-nrs.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dirstream.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-auxv.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-cache.h ldconfig/x86: Store ISA level in cache and aux cache 2021-01-13 05:51:17 -08:00
dl-dtprocnum.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-dtv.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-execve.h elf: execve statically linked programs instead of crashing [BZ #28648] 2021-12-05 11:28:34 +01:00
dl-fcntl.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-fileid.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-fptr.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-hash.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-hwcap-check.h elf: Add hook for checking HWCAP bits after auxiliary vector parsing 2021-05-19 11:09:57 +02:00
dl-irel.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-isa-level.h ldconfig/x86: Store ISA level in cache and aux cache 2021-01-13 05:51:17 -08:00
dl-librecon.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
dl-lookupcfg.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-machine-rel.h elf: Fix dynamic-link.h usage on rtld.c 2021-10-14 14:52:07 -03:00
dl-machine.h elf: Fix dynamic-link.h usage on rtld.c 2021-10-14 14:52:07 -03:00
dl-minimal-malloc.h elf: Use the minimal malloc on tunables_strdup 2021-11-09 14:11:25 -03:00
dl-mman.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-osinfo.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-procinfo.c
dl-procinfo.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
dl-procruntime.c
dl-prop.h Initial support for GNU_PROPERTY_1_NEEDED 2021-10-07 10:26:08 -07:00
dl-protected.h Add run-time check for indirect external access 2021-10-07 10:26:48 -07:00
dl-relocate-ld.h ld.so: Initialize bootstrap_map.l_ld_readonly [BZ #28340] 2021-10-19 06:40:38 -07:00
dl-sysdep.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-tls.h
dl-unistd.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-vdso-setup.c elf: Move vDSO setup to rtld (BZ#24967) 2020-01-03 11:22:07 -03:00
dl-vdso-setup.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-vdso.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dwarf2.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
elf_machine_sym_no_match.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
elf-initfini.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
elf-read-prop.h ldconfig/x86: Store ISA level in cache and aux cache 2021-01-13 05:51:17 -08:00
elide.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
eloop-threshold.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
entry.h
errqueue.h
fd_to_filename.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
features-time64.h y2038: Add support for 64-bit time on legacy ABIs 2021-06-15 10:42:11 -03:00
fenv_private.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
fips-private.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
fix-fp-int-compare-invalid.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
fix-fp-int-convert-overflow.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
fix-int-fp-convert-zero.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
float128-abi.h
fork.h posix: Consolidate fork implementation 2021-06-24 10:02:06 -03:00
fpu_control.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
framestate.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
gcc-compat.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
gccframe.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
get-rounding-mode.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
gmp-mparam.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
hp-timing-common.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
hp-timing.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
ifreq.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
ifunc-init.h x86_64: Add support for __memcmpeq using sse2, avx2, and evex 2021-10-27 13:03:46 -05:00
ifunc-sel.h
internal-signals.h nptl: Remove __libc_allocate_rtsig, __libc_current_sigrtmax, and __libc_current_sigrtmin 2021-03-26 13:37:18 -03:00
intr-msg.h
ld.abilist
ldbl-classify-compat.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
ldconfig.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
ldsodefs.h elf: Introduce GLRO (dl_libc_freeres), called from __libc_freeres 2021-11-17 12:20:29 +01:00
libanl.abilist
libBrokenLocale.abilist
libc_malloc_debug.abilist Move malloc hooks into a compat DSO 2021-07-22 18:37:59 +05:30
libc_start_call_main.h csu: Move calling main out of __libc_start_main_impl 2021-04-21 19:49:50 +02:00
libc-lock.h Remove pthread_key_create-related internals from libc-lock.h 2021-04-21 19:49:51 +02:00
libc-mmap.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
libc-mtag.h malloc: Only support zeroing and not arbitrary memset with mtag 2021-03-26 11:03:06 +00:00
libc-start.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
libc-symver.h Support for multiple versions in versioned_symbol, compat_symbol 2021-03-25 12:33:02 +01:00
libc-tsd.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
libc.abilist Make sysdeps/generic/libc.abilist empty 2021-05-13 21:28:17 +00:00
libcrypt.abilist
libdl.abilist
libm-alias-double.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
libm-alias-float128.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
libm-alias-float.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
libm-alias-ldouble.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
libm-test-ulps Replace gen-libm-test.pl with gen-libm-test.py. 2018-08-09 15:34:12 +00:00
libm-test-ulps-name
libm.abilist
libnsl.abilist
libnss_compat.abilist
libnss_db.abilist
libnss_dns.abilist
libnss_files.abilist
libnss_hesiod.abilist
libnss_nis.abilist
libnss_nisplus.abilist
libpthread.abilist
libresolv.abilist
librt.abilist
libutil.abilist
link_map.h Initial support for GNU_PROPERTY_1_NEEDED 2021-10-07 10:26:08 -07:00
linkmap.h
local-setxid.h
localplt.data mtrace: Wean away from malloc hooks 2021-07-22 18:38:06 +05:30
machine-gmon.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
machine-lock.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
machine-sp.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
Makefile Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
malloc-alignment.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
malloc-machine.h Add a generic malloc test for MALLOC_ALIGNMENT 2021-07-09 06:39:30 -07:00
malloc-size.h Add a generic malloc test for MALLOC_ALIGNMENT 2021-07-09 06:39:30 -07:00
malloc-sysdep.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math_ldbl_opt.h Use PRINTF_LDBL_IS_DBL instead of __ldbl_is_dbl. 2018-12-05 18:15:43 -02:00
math_ldbl.h
math_private_calls.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math_private.h math: Remove mpa files [BZ #15267] 2021-03-11 14:26:36 +00:00
math-barriers.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-nan-payload-double.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-nan-payload-float.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-narrow-alias-float128.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-narrow-alias.h Add narrowing square root functions 2021-09-10 20:56:22 +00:00
math-tests-arch.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-tests-exceptions.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-tests-rounding.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-tests-snan-cast.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-tests-snan-payload.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-tests-snan.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-tests-trap-force.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-tests-trap.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-tests.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math-type-macros-double.h Add narrowing square root functions 2021-09-10 20:56:22 +00:00
math-type-macros-float128.h Add narrowing square root functions 2021-09-10 20:56:22 +00:00
math-type-macros-float.h Add narrowing square root functions 2021-09-10 20:56:22 +00:00
math-type-macros-ldouble.h Add narrowing square root functions 2021-09-10 20:56:22 +00:00
math-type-macros.h Add narrowing square root functions 2021-09-10 20:56:22 +00:00
math-use-builtins-ceil.h math: Decompose math-use-builtins.h 2020-06-22 11:09:45 -03:00
math-use-builtins-copysign.h math: Decompose math-use-builtins.h 2020-06-22 11:09:45 -03:00
math-use-builtins-floor.h math: Decompose math-use-builtins.h 2020-06-22 11:09:45 -03:00
math-use-builtins-fma.h math: Decompose math-use-builtins.h 2020-06-22 11:09:45 -03:00
math-use-builtins-nearbyint.h math: Decompose math-use-builtins.h 2020-06-22 11:09:45 -03:00
math-use-builtins-rint.h math: Decompose math-use-builtins.h 2020-06-22 11:09:45 -03:00
math-use-builtins-round.h math: Decompose math-use-builtins.h 2020-06-22 11:09:45 -03:00
math-use-builtins-roundeven.h Use GCC builtins for roundeven functions if desired. 2021-06-27 07:56:57 -07:00
math-use-builtins-sqrt.h math: Decompose math-use-builtins.h 2020-06-22 11:09:45 -03:00
math-use-builtins-trunc.h math: Decompose math-use-builtins.h 2020-06-22 11:09:45 -03:00
math-use-builtins.h Use GCC builtins for roundeven functions if desired. 2021-06-27 07:56:57 -07:00
memcopy.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
memusage.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
mmap_info.h posix: Fix large mmap64 offset for mips64n32 (BZ#24699) 2019-07-10 16:52:50 -03:00
nan-high-order-bit.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
not-cancel.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
not-errno.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
nscd-types.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
pagecopy.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
paths.h
profil-counter.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
pty-private.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
register-dump.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
rtld_static_init.h elf: Partially initialize ld.so after static dlopen (bug 20802) 2021-05-17 10:06:57 +02:00
rtld-lowlevel.h
safe-fatal.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
setjmpP.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sigcontextinfo.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
siglist-compat.c signal: Move sys_siglist to a compat symbol 2020-07-07 14:10:58 -03:00
siglist-compat.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
siglist.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sigset-cvt-mask.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
sigsetops.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
single-thread.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
spawn_int_def.h posix: Add posix_spawn_file_actions_addclosefrom_np 2021-07-08 14:08:15 -03:00
stackguard-macros.h
stackinfo.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
stap-probe-machine.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
startup.h Use <startup.h> in __libc_init_secure 2021-01-19 09:55:47 -08:00
stdio-lock.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
string_private.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
struct_stat_time64.h linux: Add {f}stat{at} y2038 support 2020-10-09 17:02:07 -03:00
symbol-hacks.h Disable symbol hack in libc_nonshared.a 2021-09-27 07:46:25 -07:00
sysdep-cancel.h nptl: Remove tst-cancel-wrappers test and related macros 2019-01-03 18:38:08 -02:00
sysdep.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
thread_state.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
time64-compat.h y2038: Add support for 64-bit time on legacy ABIs 2021-06-15 10:42:11 -03:00
time-clockid.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tininess.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tls-internal-struct.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tls-internal.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tls-internal.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tls-setup.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tls.h Remove TLS_TCB_ALIGN and TLS_INIT_TCB_ALIGN 2021-12-09 23:47:49 +01:00
tst-audit.h
tst-stack-align.h Properly check stack alignment [BZ #27901] 2021-05-24 07:42:12 -07:00
unsecvars.h
unwind-arch.h Implement <unwind-link.h> for dynamically loading the libgcc_s unwinder 2021-03-01 15:58:01 +01:00
unwind-dw2-fde-glibc.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
unwind-dw2-fde.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
unwind-dw2-fde.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
unwind-dw2.c Legacy unwinder: Remove definition of _Unwind_GetCFA 2021-03-16 15:33:09 +01:00
unwind-link.h Implement <unwind-link.h> for dynamically loading the libgcc_s unwinder 2021-03-01 15:58:01 +01:00
unwind-pe.c
unwind-pe.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
unwind-resume.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
unwind-resume.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
unwind.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
utmp-equal.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
xstatver.h Remove mknod wrapper functions, move them to symbols 2020-10-09 17:02:06 -03:00