| Commit message (Collapse) | Author | Age | Files | Lines |
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Hide internal __readv and __writev functions to allow direct access
within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* include/sys/uio.h (__readv): Add libc_hidden_proto.
(__writev): Likewise.
* misc/readv.c (__readv): Add libc_hidden_def.
* misc/writev.c (__writev): Likewise.
* sysdeps/posix/readv.c (__readv): Likewise.
* sysdeps/posix/writev.c (__writev): Likewise.
* sysdeps/unix/sysv/linux/readv.c: Include <sys/uio.h>.
(__readv): Likewise.
* sysdeps/unix/sysv/linux/writev.c: Include <sys/uio.h>.
(__writev): Likewise.
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Hide internal regex functions to allow direct access within libc.so and
libc.a without using GOT nor PLT.
[BZ #18822]
* include/regex.h (__re_compile_fastmap): Add attribute_hidden.
(__regcomp): Add libc_hidden_proto.
(__regexec): Likewise.
(__regfree): Likewise.
* posix/regcomp.c (__regcomp): Add libc_hidden_def.
(__regfree): Likewise.
* posix/regexec.c (__regexec): Likewise.
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Mark internal utmp functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* include/utmp.h (__updwtmp): Add libc_hidden_proto.
(__getutent): Likewise.
(__getutid): Likewise.
(__getutline): Likewise.
(__pututline): Likewise.
(__getutent_r): Likewise.
(__getutid_r): Likewise.
(__getutline_r): Likewise.
(__utmpname): Add attribute_hidden.
(__setutent): Likewise.
(__endutent): Likewise.
* login/getutent.c (__getutent): Add libc_hidden_def.
* login/getutent_r.c (__getutent_r): Likewise.
(__pututline): Likewise.
* login/getutid.c (__getutid): Likewise.
* login/getutid_r.c (__getutid_r): Likewise.
* login/getutline.c (__getutline): Likewise.
* login/getutline_r.c (__getutline_r): Likewise.
* login/updwtmp.c (__updwtmp): Likewise.
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Mark internal dirent functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT. __readdir64
is hidden with libc_hidden_proto and libc_hidden_def since the exported
readdir64 is an alias of __readdir64.
[BZ #18822]
* include/dirent.h (__opendir): Always add attribute_hidden.
(__fdopendir): Likewise.
(__closedir): Likewise.
(__readdir): Likewise.
(__readdir64): Add libc_hidden_proto.
* sysdeps/mach/hurd/readdir64.c (__readdir64): Add libc_hidden_def.
* sysdeps/unix/sysv/linux/i386/readdir64.c (__readdir64): Likewise.
* sysdeps/unix/sysv/linux/readdir64.c (__readdir64): Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/readdir.c (__GI___readdir64):
New alias.
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Mark internal getXXXbyYYY functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* include/aliases.h (__getaliasbyname_r): Add attribute_hidden.
* include/netdb.h (__gethostbyaddr_r): Likewise.
(__gethostbyname_r): Likewise.
(__gethostbyname2_r): Likewise.
(__getnetbyaddr_r): Likewise.
(__getnetbyname_r): Likewise.
(__getservbyname_r): Likewise.
(__getservbyport_r): Likewise.
(__getprotobyname_r): Likewise.
(__getprotobynumber_r): Likewise.
(__getnetgrent_r): Likewise.
* include/rpc/netdb.h (__getrpcbyname_r): Likewise.
(__getrpcbynumber_r): Likewise.
* nss/getXXbyYY.c (INTERNAL (REENTRANT_NAME)): Likewise.
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Mark internal stdio functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* include/stdio.h (__fcloseall): Add attribute_hidden.
(__getline): Likewise.
(__path_search): Likewise.
(__gen_tempname): Likewise.
(__libc_message): Likewise.
(__flockfile): Likewise.
(__funlockfile): Likewise.
(__fxprintf): Likewise.
(__fxprintf_nocancel): Likewise.
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Mark internal gshadow functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* include/gshadow.h (__fgetsgent_r): Add attribute_hidden.
(__sgetsgent_r): Likewise.
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Mark internal statfs functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* include/sys/statfs.h (__fstatfs): Add attribute_hidden.
(__statfs64): Likewise.
(__fstatfs64): Likewise.
* include/sys/statvfs.h (__statvfs64): Likewise.
(__fstatvfs64): Likewise.
* sysdeps/unix/sysv/linux/pathconf.h (__statfs_link_max): Likewise.
(__statfs_filesize_max): Likewise.
(__statfs_symlinks): Likewise.
(__statfs_chown_restricted): Likewise.
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Mark internal time functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* include/time.h (__tzstring): Add attribute_hidden.
(__tzfile_read): Likewise.
(__tzfile_compute): Likewise.
(__tzfile_default): Likewise.
(__tzset_parse_tz): Likewise.
(__offtime): Likewise.
(__asctime_r): Likewise.
(__tzset): Likewise.
(__tz_convert): Likewise.
(__getdate_r): Likewise.
(__getclktck): Likewise.
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Mark internal nscd functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* nscd/nscd-client.h (__nscd_get_map_ref): Add attribute_hidden.
(__nscd_unmap): Likewise.
(__nscd_cache_search): Likewise.
(__nscd_get_nl_timestamp): Likewise.
(__nscd_getpwnam_r): Likewise.
(__nscd_getpwuid_r): Likewise.
(__nscd_getgrnam_r): Likewise.
(__nscd_getgrgid_r): Likewise.
(__nscd_gethostbyname_r): Likewise.
(__nscd_gethostbyname2_r): Likewise.
(__nscd_gethostbyaddr_r): Likewise.
(__nscd_getai): Likewise.
(__nscd_getgrouplist): Likewise.
(__nscd_getservbyname_r): Likewise.
(__nscd_getservbyport_r): Likewise.
(__nscd_innetgr): Likewise.
(__nscd_setnetgrent): Likewise.
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Mark internal gmp functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* include/gmp.h: Declare internal functions only if _ISOMAC is
undefined.
(__mpn_extract_double): Add attribute_hidden.
(__mpn_extract_long_double): Likewise.
(__mpn_extract_float128): Likewise.
(__mpn_construct_float): Likewise.
(__mpn_construct_double): Likewise.
(__mpn_construct_long_double): Likewise.
(__mpn_construct_float128): Likewise.
(mpn_add_1): Likewise.
(mpn_addmul_1): Likewise.
(mpn_add_n): Likewise.
(mpn_cmp): Likewise.
(mpn_divrem): Likewise.
(mpn_lshift): Likewise.
(mpn_mul): Likewise.
(mpn_mul_1): Likewise.
(mpn_rshift): Likewise.
(mpn_sub_1): Likewise.
(mpn_submul_1): Likewise.
(mpn_sub_n): Likewise.
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Mark internal wchar functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* include/wchar.h (__wcsnlen): Add attribute_hidden.
(__wcscat): Likewise.
(__btowc): Likewise.
(__wcrtomb): Likewise.
(__mbsrtowcs): Likewise.
(__wcsrtombs): Likewise.
(__mbsnrtowcs): Likewise.
(__wcsnrtombs): Likewise.
(__wcsncpy): Likewise.
(__wcpncpy): Likewise.
(__wmemcpy): Likewise.
(__wmempcpy): Likewise.
(__wmemmove): Likewise.
(__wcschrnul): Likewise.
(__vfwscanf): Likewise.
(__vswprintf): Likewise.
(__fwprintf): Likewise.
(__vfwprintf): Likewise.
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Mark internal grp/pwd/shadow functions with attribute_hidden to allow
direct access within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* include/grp.h (__fgetgrent_r): Add attribute_hidden.
(__getgrgid_r): Likewise.
(__getgrnam_r): Likewise.
* include/pwd.h (__getpwuid_r): Likewise.
(__getpwnam_r): Likewise.
(__fgetpwent_r): Likewise.
* include/shadow.h (__getspnam_r): Likewise.
(__sgetspent_r): Likewise.
(__fgetspent_r): Likewise.
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Mark internal unistd functions with attribute_hidden to allow direct
access to them within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* include/unistd.h (__access): Add attribute_hidden.
(__lseek64): Likewise.
(__libc_pread64): Likewise.
(__pipe2): Likewise.
(__sleep): Likewise.
(__chdir): Likewise.
(__fchdir): Likewise.
(__getcwd): Likewise.
(__rmdir): Likewise.
(__execvpe): Likewise.
(__execve): Likewise.
(__setsid): Likewise.
(__getuid): Likewise.
(__geteuid): Likewise.
(__getgid): Likewise.
(__getegid): Likewise.
(__getgroups): Likewise.
(__group_member): Likewise.
(__ttyname_r): Likewise.
(__isatty): Likewise.
(__readlink): Likewise.
(__unlink): Likewise.
(__gethostname): Likewise.
(__profil): Likewise.
(__getdtablesize): Likewise.
(__brk): Likewise.
(__ftruncate): Likewise.
(__ftruncate64): Likewise.
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Mark internal argp functions with attribute_hidden to allow direct
access to them within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* argp/argp-fmtstream.c: Include <argp-fmtstream.h>.
* argp/argp-fs-xinl.c: Likewise.
* argp/argp-help.c: Include <argp.h> and <argp-fmtstream.h>.
* argp/argp-parse.c: Include <argp.h>.
* argp/argp-xinl.c: Likewise.
* include/argp-fmtstream.h: New file.
* include/argp.h (__argp_error): Add attribute_hidden.
(__argp_failure): Likewise.
(__argp_input): Likewise.
(__argp_state_help): Likewise.
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Mark ____wcsto*_l_internal functions with attribute_hidden to allow
direct access to them within libc.so and libc.a without using GOT nor
PLT.
[BZ #18822]
* include/wchar.h (____wcstof_l_internal): New prototype.
(____wcstod_l_internal): Likewise.
(____wcstold_l_internal): Likewise.
(____wcstol_l_internal): Likewise.
(____wcstoul_l_internal): Likewise.
(____wcstoll_l_internal): Likewise.
(____wcstoull_l_internal): Likewise.
(____wcstof128_l_internal): Likewise.
* sysdeps/ieee754/float128/wcstof128.c
(____wcstof128_l_internal): Removed.
* sysdeps/ieee754/float128/wcstof128_l.c
(____wcstof128_l_internal): Likewise.
* wcsmbs/wcstod.c (____wcstod_l_internal): Likewise.
* wcsmbs/wcstod_l.c (____wcstod_l_internal): Likewise.
* wcsmbs/wcstof.c (____wcstof_l_internal): Likewise.
* wcsmbs/wcstof_l.c (____wcstof_l_internal): Likewise.
* wcsmbs/wcstol_l.c (____wcstol_l_internal): Likewise.
* wcsmbs/wcstold.c (____wcstold_l_internal): Likewise.
* wcsmbs/wcstold_l.c (____wcstold_l_internal): Likewise.
* wcsmbs/wcstoll_l.c (____wcstoll_l_internal): Likewise.
* wcsmbs/wcstoul_l.c (____wcstoul_l_internal): Likewise.
* wcsmbs/wcstoull_l.c (____wcstoull_l_internal): Likewise.
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Mark __internal_statvfs[64] with attribute_hidden to allow direct access
to them within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* sysdeps/unix/sysv/linux/fstatvfs.c: Include "internal_statvfs.h"
instead of <sys/statvfs.h>.
(__internal_statvfs): Removed.
* sysdeps/unix/sysv/linux/fstatvfs64.c Include "internal_statvfs.h"
instead of <sys/statvfs.h>.
(__internal_statvfs64): Removed.
* sysdeps/unix/sysv/linux/internal_statvfs.c: Include
"internal_statvfs.h" instead of <sys/statvfs.h>.
* sysdeps/unix/sysv/linux/internal_statvfs.h: New file.
* sysdeps/unix/sysv/linux/statvfs.c Include "internal_statvfs.h"
instead of <sys/statvfs.h>.
(__internal_statvfs): Removed.
* sysdeps/unix/sysv/linux/statvfs64.c Include "internal_statvfs.h"
instead of <sys/statvfs.h>.
(__internal_statvfs64): Removed.
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Mark internal functions with attribute_hidden to allow direct access to
internal functions within libc.so and libc.a without using GOT nor PLT.
Size comparison of libc.so:
On x86-64:
text data bss dec hex
Before: 1728577 20584 17088 1766249 1af369
After : 1728593 20584 17088 1766265 1af379
The only change is __gconv_release_shlib in iconv/gconv_dl.c is inlined
since it is hidden, which increases the code size of gconv_dl.os by 18
bytes.
On i686:
text data bss dec hex
Before: 1869039 11444 11112 1891595 1cdd0b
After : 1868635 11444 11112 1891191 1cdb77
The code size is decreased by avoiding GOT/PLT for hidden functions.
[BZ #18822]
* iconv/gconv_int.h (__gconv_open): Add attribute_hidden.
(__gconv_close): Likewise.
(__gconv): Likewise.
(__gconv_find_transform): Likewise.
(__gconv_lookup_cache): Likewise.
(__gconv_compare_alias_cache): Likewise.
(__gconv_load_cache): Likewise.
(__gconv_get_path): Likewise.
(__gconv_close_transform): Likewise.
(__gconv_release_cache): Likewise.
(__gconv_find_shlib): Likewise.
(__gconv_release_shlib): Likewise.
(__gconv_get_builtin_trans): Likewise.
(__gconv_compare_alias): Likewise.
* include/dlfcn.h (_dlerror_run): Likewise.
* include/stdio.h (__fortify_fail_abort): Likewise.
* include/time.h (__tz_compute): Likewise.
(__strptime_internal): Likewise.
* intl/gettextP.h (_nl_find_domain): Likewise.
(_nl_load_domain): Likewise.
(_nl_find_msg): Likewise.
* intl/plural-exp.h (FREE_EXPRESSION): Likewise.
(EXTRACT_PLURAL_EXPRESSION): Likewise.
* locale/coll-lookup.h (__collidx_table_lookup): Likewise.
* resolv/gai_misc.h (__gai_enqueue_request): Likewise.
(__gai_find_request): Likewise.
(__gai_remove_request): Likewise.
(__gai_notify): Likewise.
(__gai_notify_only): Likewise.
* sysdeps/generic/aio_misc.h (__aio_sigqueue): Likewise.
* sysdeps/generic/ldsodefs.h (_dl_fini): Likewise.
(_dl_non_dynamic_init): Likewise.
(_dl_aux_init): Likewise.
* sysdeps/i386/machine-gmon.h (mcount_internal): Likewise.
* sysdeps/unix/sysv/linux/i386/olddirent.h (__old_getdents64):
Likewise.
* wcsmbs/wcsmbsload.h (__wcsmbs_load_conv): Likewise.
(__wcsmbs_clone_conv): Likewise.
(__wcsmbs_named_conv): Likewise.
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Mark internal stdlib functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT. __realpath
is hidden with libc_hidden_proto and libc_hidden_def since the exported
realpath is an alias of __realpath.
[BZ #18822]
* include/stdlib.h (__random): Add attribute_hidden.
(__random_r): Likewise.
(__srandom_r): Likewise.
(__initstate_r): Likewise.
(__setstate_r): Likewise.
(__erand48_r): Likewise.
(__nrand48_r): Likewise.
(__jrand48_r): Likewise.
(__srand48_r): Likewise.
(__seed48_r): Likewise.
(__lcong48_r): Likewise.
(__drand48_iterate): Likewise.
(__setenv): Likewise.
(__unsetenv): Likewise.
(__clearenv): Likewise.
(__ptsname_r): Likewise.
(__posix_openpt): Likewise.
(__add_to_environ): Likewise.
(__realpath): Add libc_hidden_proto.
(__ecvt_r): Likewise.
(__fcvt_r): Likewise.
(__qecvt_r): Likewise.
(__qfcvt_r): Likewise.
* misc/efgcvt_r.c (cvt_symbol_1): Add libc_hidden_def (local).
* stdlib/canonicalize.c (__realpath): Add libc_hidden_def.
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Mark __ptsname_internal, __mktime_internal and __fopen_internal with
attribute_hidden to allow direct access to them within libc.so and
libc.a without using GOT nor PLT.
[BZ #18822]
* include/stdlib.h (__ptsname_internal): Add attribute_hidden.
* include/time.h (__mktime_internal): Likewise.
* libio/iolibio.h (__fopen_internal): Likewise.
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__setcontext on hppa.
* sysdeps/unix/sysv/linux/hppa/getcontext.S (__getcontext): Save return
pointer in frame.
* sysdeps/unix/sysv/linux/hppa/setcontext.S (__setcontext): Likewise.
Correct offset used to restore PIC register.
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[BZ libc/22165]
* sysdeps/unix/sysv/linux/hppa/getcontext.S (__getcontext): Use PIC
code to load address of __getcontext_ret when generating PIC code.
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tst-tls1-static-non-pie is built with $(no-pie-ldflag) to make it a
non-PIE static executable, regardless if --enable-static-pie is used
to configure glibc.
* elf/Makefile (tests-static-internal): Add
tst-tls1-static-non-pie.
(LDFLAGS-tst-tls1-static-non-pie): New.
* elf/tst-tls1-static-non-pie.c: New file.
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Continuing the move of libm aliases to common macros that can create
_FloatN / _FloatNx aliases in future, this patch converts some dbl-64
functions to using libm_alias_double, thereby eliminating the need for
some ldbl-opt wrappers.
This patch deliberately limits what functions are converted so that it
can be verified by comparison of stipped binaries. Specifically, atan
and tan are excluded because they first need converting to being weak
aliases; fma is omitted as it has additional complications with
versions in other directories (removing the ldbl-opt version can
e.g. cause the ldbl-128 version to be used instead of dbl-64); and
functions that have both dbl-64/wordsize-64 and ldbl-opt versions are
excluded because ldbl-opt currently always wraps dbl-64 function
versions, so changing those will result in platforms using both
ldbl-opt and dbl-64/wordsize-64 (i.e. alpha) starting to use the
dbl-64/wordsize-64 versions of those functions (which is good, as an
optimization, but still best separated from the present patch to get
better validation).
Tested for x86_64, and tested with build-many-glibcs.py that installed
stripped shared libraries are unchanged by the patch.
* sysdeps/ieee754/dbl-64/s_asinh.c: Include <libm-alias-double.h>.
(asinh): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_cbrt.c: Include <libm-alias-double.h>.
(cbrt): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_copysign.c: Include
<libm-alias-double.h>.
(copysign): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_erf.c: Include <libm-alias-double.h>.
(erf): Define using libm_alias_double.
(erfc): Likewise.
* sysdeps/ieee754/dbl-64/s_expm1.c: Include <libm-alias-double.h>.
(expm1): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_fabs.c: Include <libm-alias-double.h>.
(fabs): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_fromfp.c (fromfp): Define using
libm_alias_double.
* sysdeps/ieee754/dbl-64/s_fromfp_main.c: Include
<libm-alias-double.h>.
* sysdeps/ieee754/dbl-64/s_fromfpx.c (fromfpx): Define using
libm_alias_double.
* sysdeps/ieee754/dbl-64/s_getpayload.c: Include
<libm-alias-double.h>.
(getpayload): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_llrint.c: Include
<libm-alias-double.h>.
(llrint): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_lrint.c: Include <libm-alias-double.h>.
(lrint): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_nextup.c: Include
<libm-alias-double.h>.
(nextup): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_roundeven.c: Include
<libm-alias-double.h>.
(roundeven): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_setpayload.c (setpayload): Define using
libm_alias_double.
* sysdeps/ieee754/dbl-64/s_setpayload_main.c: Include
<libm-alias-double.h>.
* sysdeps/ieee754/dbl-64/s_setpayloadsig.c (setpayloadsig): Define
using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_sin.c: Include <libm-alias-double.h>.
(cos): Define using libm_alias_double.
(sin): Likewise.
* sysdeps/ieee754/dbl-64/s_sincos.c: Include
<libm-alias-double.h>.
(sincos): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_tanh.c: Include <libm-alias-double.h>.
(tanh): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_totalorder.c: Include
<libm-alias-double.h>.
(totalorder): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_totalordermag.c: Include
<libm-alias-double.h>.
(totalordermag): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/s_ufromfp.c (ufromfp): Define using
libm_alias_double.
* sysdeps/ieee754/dbl-64/s_ufromfpx.c (ufromfpx): Define using
libm_alias_double.
* sysdeps/ieee754/dbl-64/wordsize-64/s_getpayload.c: Include
<libm-alias-double.h>.
(getpayload): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/wordsize-64/s_roundeven.c: Include
<libm-alias-double.h>.
(roundeven): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/wordsize-64/s_setpayload_main.c: Include
<libm-alias-double.h>.
* sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c: Include
<libm-alias-double.h>.
(totalorder): Define using libm_alias_double.
* sysdeps/ieee754/dbl-64/wordsize-64/s_totalordermag.c: Include
<libm-alias-double.h>.
(totalordermag): Define using libm_alias_double.
* sysdeps/ieee754/ldbl-opt/s_copysign.c (copysignl): Only define
libc compat symbol here.
* sysdeps/ieee754/ldbl-opt/s_asinh.c: Remove file.
* sysdeps/ieee754/ldbl-opt/s_cbrt.c: Likewise.
* sysdeps/ieee754/ldbl-opt/s_erf.c: Likewise.
* sysdeps/ieee754/ldbl-opt/s_expm1.c: Likewise.
* sysdeps/ieee754/ldbl-opt/s_fabs.c: Likewise.
* sysdeps/ieee754/ldbl-opt/s_llrint.c: Likewise.
* sysdeps/ieee754/ldbl-opt/s_lrint.c: Likewise.
* sysdeps/ieee754/ldbl-opt/s_sin.c: Likewise.
* sysdeps/ieee754/ldbl-opt/s_sincos.c: Likewise.
* sysdeps/ieee754/ldbl-opt/s_tanh.c: Likewise.
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When --enable-static-pie is used to configure glibc, we need to use
_dl_relocate_static_pie to compute load address in static PIE.
* sysdeps/arm/dl-machine.h (elf_machine_load_address): Use
_dl_relocate_static_pie instead of _dl_start to compute load
address in static PIE. Return 0 if _DYNAMIC is undefined for
static executable.
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mips uses a local label to compute load address, which works with static
PIE. We just need to return 0 if _DYNAMIC is undefined for static
executable.
* sysdeps/mips/dl-machine.h (elf_machine_dynamic): Return 0 if
_DYNAMIC is undefined for static executable.
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Since start.o may be compiled as PIC, we should check PIC instead of
SHARED.
* sysdeps/arm/start.S (_start): Check PIC instead of SHARED.
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* sysdeps/x86_64/fpu/libm-test-ulps: Update.
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A few math functions still use __fabs(f/l) rather than fabs, which
means they won't be inlined. Rename them so they are inlined.
Also add -fno-builtin-fabsl to nofpu powerpc makefile to work around
BZ #29253.
* sysdeps/ieee754/dbl-64/e_lgamma_r.c
(__ieee754_lgamma_r): Use fabs rather than __fabs.
* sysdeps/ieee754/dbl-64/e_log10.c (__ieee754_log10): Likewise.
* sysdeps/ieee754/dbl-64/e_log2.c (__ieee754_log2): Likewise.
* sysdeps/ieee754/flt-32/e_lgammaf_r.c
(__ieee754_lgammaf_r): Use fabsf rather than __fabsf.
* sysdeps/ieee754/flt-32/e_log10f.c (__ieee754_log10f): Likewise.
* sysdeps/ieee754/flt-32/e_log2f.c (__ieee754_log2f): Likewise.
* sysdeps/ieee754/ldbl-128/e_lgammal_r.c
(__ieee754_lgammal_r): Use fabsl rather than __fabsl.
* sysdeps/ieee754/ldbl-128/e_log10l.c (__ieee754_log10l): Likewise.
* sysdeps/ieee754/ldbl-128/e_log2l.c (__ieee754_log2l): Likewise.
* sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c
(__ieee754_lgammal_r): Use fabsl rather than __fabsl.
* sysdeps/ieee754/ldbl-128ibm/e_log10l.c (__ieee754_log10l): Likewise.
* sysdeps/ieee754/ldbl-128ibm/e_log2l.c (__ieee754_log2l): Likewise.
* sysdeps/powerpc/nofpu/Makefile: Add -fno-builtin-fabsl for BZ #29253.
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Remove old cimag inlines that are only used in GCC 2.96 or older.
* math/bits/cmathcalls.h (cimag): Remove inline.
(creal): Remove inline.
(conj): Remove inline.
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without wrapper on aarch64:
powf reciprocal-throughput: 4.2x faster
powf latency: 2.6x faster
old worst-case error: 1.11 ulp
new worst-case error: 0.82 ulp
aarch64 .text size: -780 bytes
aarch64 .rodata size: +144 bytes
powf(x,y) is implemented as exp2(y*log2(x)) with the same algorithms
that are used in exp2f and log2f, except that the log2f polynomial is
larger for extra precision and its output (and exp2f input) may be
scaled by a power of 2 (POWF_SCALE) to simplify the argument reduction
step of exp2 (possible when efficient round and convert toint operation
is available).
The special case handling tries to minimize the checks in the hot path.
When the input of exp2_inline is checked, int arithmetics is used as
that was faster on the tested aarch64 cores.
* math/Makefile (type-float-routines): Add e_powf_log2_data.
* sysdeps/ieee754/flt-32/e_powf.c: New implementation.
* sysdeps/ieee754/flt-32/e_powf_log2_data.c: New file.
* sysdeps/ieee754/flt-32/math_config.h (__powf_log2_data): Define.
(issignalingf_inline): Likewise.
(POWF_LOG2_TABLE_BITS): Likewise.
(POWF_LOG2_POLY_ORDER): Likewise.
(POWF_SCALE_BITS): Likewise.
(POWF_SCALE): Likewise.
* sysdeps/i386/fpu/e_powf_log2_data.c: New file.
* sysdeps/ia64/fpu/e_powf_log2_data.c: New file.
* sysdeps/m68k/m680x0/fpu/e_powf_log2_data.c: New file.
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Similar to the new logf: double precision arithmetics and a small
lookup table is used. The argument reduction step is the same as in
the new logf.
without wrapper on aarch64:
log2f reciprocal-throughput: 2.3x faster
log2f latency: 2.1x faster
old worst case error: 1.72 ulp
new worst case error: 0.75 ulp
aarch64 .text size: -252 bytes
aarch64 .rodata size: +244 bytes
* math/Makefile (type-float-routines): Add e_log2f_data.
* sysdeps/ieee754/flt-32/e_log2f.c: New implementation.
* sysdeps/ieee754/flt-32/e_log2f_data.c: New file.
* sysdeps/ieee754/flt-32/math_config.h (__log2f_data): Define.
(LOG2F_TABLE_BITS, LOG2F_POLY_ORDER): Define.
* sysdeps/i386/fpu/e_log2f_data.c: New file.
* sysdeps/ia64/fpu/e_log2f_data.c: New file.
* sysdeps/m68k/m680x0/fpu/e_log2f_data.c: New file.
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without wrapper on aarch64:
logf reciprocal-throughput: 2.2x faster
logf latency: 1.9x faster
old worst case error: 0.89 ulp
new worst case error: 0.82 ulp
aarch64 .text size: -356 bytes
aarch64 .rodata size: +240 bytes
Uses double precision arithmetics and a lookup table to allow smaller
polynomial and avoid the use of division.
Data is in a separate translation unit with fixed layout to prevent the
compiler generating suboptimal literal access.
Errors are handled inline according to POSIX rules, but this patch
keeps the wrapper with SVID compatible error handling.
Needs libm-test-ulps adjustment for clogf in non-nearest rounding mode.
* math/Makefile (type-float-routines): Add e_logf_data.
* sysdeps/ieee754/flt-32/e_logf.c: New implementation.
* sysdeps/ieee754/flt-32/e_logf_data.c: New file.
* sysdeps/ieee754/flt-32/math_config.h (__logf_data): Define.
(LOGF_TABLE_BITS, LOGF_POLY_ORDER): Define.
* sysdeps/i386/fpu/e_logf_data.c: New file.
* sysdeps/ia64/fpu/e_logf_data.c: New file.
* sysdeps/m68k/m680x0/fpu/e_logf_data.c: New file.
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When --enable-static-pie is used to build static PIE, _DYNAMIC is used
to compute the load address of static PIE. But _DYNAMIC is undefined
when creating static executable. This patch makes _DYNAMIC weak in PIE
libc.a so that it can be undefined.
* sysdeps/i386/dl-machine.h (elf_machine_load_address): Allow
undefined _DYNAMIC in PIE libc.a.
* sysdeps/x86_64/dl-machine.h (elf_machine_load_address):
Likewse.
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Remove __signbit inlines from mathinline.h. Math.h already uses
the builtin when supported, so additional inlines are only used
on pre 4.0 GCCs. Similarly remove ancient copysign and fabs
inlines.
* sysdeps/alpha/fpu/bits/mathinline.h: Delete file.
* sysdeps/ia64/fpu/bits/mathinline.h: Delete file.
* sysdeps/m68k/coldfire/fpu/bits/mathinline.h: Delete file.
* sysdeps/m68k/m680x0/fpu/bits/mathinline.h: (__signbitf): Remove.
(__signbit): Remove.
(__signbitl): Remove.
* sysdeps/powerpc/bits/mathinline.h (__signbitf): Remove.
(__signbit): Remove.
(__signbitl): Remove.
* sysdeps/s390/fpu/bits/mathinline.h: (__signbitf): Remove.
(__signbit): Remove.
(__signbitl): Remove
* sysdeps/sparc/fpu/bits/mathinline.h (__signbitf): Remove.
(__signbit): Remove.
(__signbitl): Remove.
* sysdeps/tile/bits/mathinline.h: Delete file.
* sysdeps/x86/fpu/bits/mathinline.h (__signbitf): Remove.
(__signbit): Remove.
(__signbitl): Remove.
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Simplify the C99 isgreater macros. Although some support was added
in GCC 2.97, not all targets added support until GCC 3.1. Therefore
only use the builtins in math.h from GCC 3.1 onwards, and defer to
generic macros otherwise. Improve the generic isunordered macro
to use compares rather than call fpclassify twice - this is not only
faster but also correct for signaling NaNs.
* math/math.h: Improve handling of C99 isgreater macros.
* sysdeps/alpha/fpu/bits/mathinline.h: Remove isgreater macros.
* sysdeps/m68k/m680x0/fpu/bits/mathinline.h: Likewise.
* sysdeps/powerpc/bits/mathinline.h: Likewise.
* sysdeps/sparc/fpu/bits/mathinline.h: Likewise.
* sysdeps/x86/fpu/bits/mathinline.h: Likewise.
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Update for new expf and logf.
* sysdeps/aarch64/libm-test-ulps: Update.
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In <https://sourceware.org/ml/libc-alpha/2013-05/msg00722.html> I
remarked on the possibility of arithmetic in various nearbyint
implementations being scheduled before feholdexcept calls, resulting
in spurious "inexact" exceptions.
I'm now actually observing this occurring in glibc built for ARM with
GCC 7 (in fact, both copies of the same addition/subtraction sequence
being combined and moved out before the conditionals and
feholdexcept/fesetenv pairs), resulting in test failures.
This patch makes the nearbyint implementations with this particular
feholdexcept / arithmetic / fesetenv pattern consistently use
math_opt_barrier on the function argument when first used in
arithmetic, and also consistently use math_force_eval before fesetenv
(the latter was generally already done, but the dbl-64/wordsize-64
implementation used math_opt_barrier instead, and as
math_opt_barrier's intended effect is through its output value being
used, such a use that doesn't use the return value is suspect).
Tested for x86_64 (--disable-multi-arch so more of these
implementations get used), and for ARM in a configuration where I saw
the problem scheduling.
[BZ #22225]
* sysdeps/ieee754/dbl-64/s_nearbyint.c (__nearbyint): Use
math_opt_barrier on argument when doing arithmetic on it.
* sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c (__nearbyint):
Likewise. Use math_force_eval not math_opt_barrier after
arithmetic.
* sysdeps/ieee754/flt-32/s_nearbyintf.c (__nearbyintf): Use
math_opt_barrier on argument when doing arithmetic on it.
* sysdeps/ieee754/ldbl-128/s_nearbyintl.c (__nearbyintl):
Likewise.
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Fix
../sysdeps/unix/sysv/linux/ifaddrs.c:835:27: error: ‘getifaddrs’ aliased to undefined symbol ‘__getifaddrs’
weak_alias (__getifaddrs, getifaddrs)
^
../sysdeps/unix/sysv/linux/ifaddrs.c:844:28: error: ‘freeifaddrs’ aliased to undefined symbol ‘__freeifaddrs’
weak_alias (__freeifaddrs, freeifaddrs)
caused by
commit 4009ddc69225d571772aaea597615a0c032e14ab
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Thu Sep 28 00:19:18 2017 +0200
hurd: Fix `getifaddrs' and `freeifaddrs' symbol exposition
* sysdeps/unix/sysv/linux/ifaddrs.c (__getifaddrs): Add
libc_hidden_def.
(__freeifaddrs): Likewise.
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from `freeaddrinfo'.
`getifaddrs' and `freeifaddrs' are not in POSIX, they should not be
exposed along `freeaddrinfo' (through `__check_pf') which is POSIX.
* include/ifaddrs.h (__getifaddrs, __freeifaddrs): New declarations,
and use libc_hidden_def on them.
* inet/ifaddrs.c (__getifaddrs, __freeifaddrs): Use libc_hidden_def on
them.
* sysdeps/gnu/ifaddrs.c (__getifaddrs, __freeifaddrs): Likewise.
* inet/check_pf.c (__check_pf): Use __getifaddrs and __freeifaddrs
instead of getifaddrs and freeifaddrs.
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`seekdir' is MISC || XOPEN, it should not be exposed along `rewinddir' which
is POSIX.
* include/dirent.h (__seekdir): New declaration.
* sysdeps/mach/hurd/seekdir.c (seekdir): Rename to __seekdir and
redefine as weak alias.
* sysdeps/mach/hurd/rewinddir.c (__rewinddir): Use __seekdir instead
of seekdir.
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`revoke' is MISC only, it should not be exposed along `unlockpt' which is
XOPEN.
* include/unistd.h (__revoke): New declaration.
* misc/revoke.c (revoke): Rename to __revoke, and redefine as weak
alias.
* sysdeps/mach/hurd/revoke.c (revoke): Likewise.
* sysdeps/unix/bsd/unlockpt.c (unlockpt): Use __revoke instead of
revoke.
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dirfd is XOPEN2K8 only, it should not be exposed along ftw which is earlier.
* include/dirent.h (__dirfd): New declaration.
* dirent/dirfd.c (dirfd): Rename to __dirfd, and redefine as weak
alias.
* sysdeps/posix/dirfd/dirfd.c (dirfd): Likewise.
* sysdeps/mach/hurd/dirfd.c (dirfd): Likewise.
* io/ftw.c (open_dir_stream, ftw_dir): Use __dirfd instead of dirfd.
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Since __dso_handle is always defined by either crtbegin.o from GCC or
dso_handle.c, it should be marked as hidden and be passed directly.
[BZ #18822]
* dlfcn/modatexit.c (foo): Remove __dso_handle check.
* dlfcn/modcxaatexit.c: Include <dso_handle.h>.
(__dso_handle): Remove declaration.
* dlfcn/tstatexit.c (__dso_handle): Removed.
(main): Don't check __dso_handle.
* dlfcn/tstcxaatexit.c (__dso_handle): Removed.
(main): Don't check __dso_handle.
* include/dso_handle.h: New file.
* malloc/mtrace.c: Include <dso_handle.h>.
(mtrace): Pass __dso_handle directly.
* nptl/pthread_atfork.c: Include <dso_handle.h>.
(__dso_handle): Remove declaration.
(__pthread_atfork): Pass __dso_handle directly.
* nptl/tst-atfork2mod.c: Include <dso_handle.h>.
(__dso_handle): Removed.
* posix/wordexp-test.c: Include <dso_handle.h>.
(__dso_handle): Remove declaration.
(__app_register_atfork): Pass __dso_handle directly.
* stdlib/at_quick_exit.c: Include <dso_handle.h>.
(__dso_handle): Remove declaration.
(at_quick_exit): Pass __dso_handle directly.
* stdlib/atexit.c: Include <dso_handle.h>.
(__dso_handle): Remove declaration.
(atexit): Pass __dso_handle directly.
* stdlib/tst-tls-atexit-lib.c: Include <dso_handle.h>.
(__dso_handle): Removed.
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sysdeps/unix/make-syscalls.sh has support, used only by x32, for
generating IFUNCs for kernel VDSO symbols. This support creates
IFUNCs by setting symbol types manually, which is bad for debug info
and does not work with current GCC mainline because it results in
errors from the checks on types of function aliases.
This patch fixes it to use the common __ifunc macro, which uses the
ifunc attribute when available and so works with GCC mainline. Note
however that the original error resulted from an indirect inclusion of
a header declaring __gettimeofday from the generated sources, and
using __ifunc now relies on such an indirect inclusion remaining as it
means use of __typeof to determine the correct types. If glibc's
headers change in such a way as to remove that indirect inclusion, it
will become necessary to change the syscalls.list syntax for VDSO
syscalls so the name of the header to include can be specified.
Tested (compilation only) with build-many-glibcs.py that this fixes
the build for x32 with GCC mainline.
* sysdeps/unix/make-syscalls.sh: Use __ifunc to define symbols
using VDSO.
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Current implementation of tunables does not set arena_max and arena_test
values. Any value provided by glibc.malloc.arena_max and
glibc.malloc.arena_test parameters is ignored.
These tunables have minval value set to 1 (see elf/dl-tunables.list file)
and undefined maxval value. In that case default value (which is 0. see
scripts/gen-tunables.awk) is being used to set maxval.
For instance, generated tunable_list[] entry for arena_max is:
(gdb) p *cur
$1 = {name = 0x7ffff7df6217 "glibc.malloc.arena_max",
type = {type_code = TUNABLE_TYPE_SIZE_T, min = 1, max = 0},
val = {numval = 0, strval = 0x0}, initialized = false,
security_level = TUNABLE_SECLEVEL_SXID_IGNORE,
env_alias = 0x7ffff7df622e "MALLOC_ARENA_MAX"}
As a result, any value of glibc.malloc.arena_max is ignored by
TUNABLE_SET_VAL_IF_VALID_RANGE macro
__type min = (__cur)->type.min; <- initialized to 1
__type max = (__cur)->type.max; <- initialized to 0!
if (min == max) <- false
{
min = __default_min;
max = __default_max;
}
if ((__type) (__val) >= min && (__type) (val) <= max) <- false
{
(__cur)->val.numval = val;
(__cur)->initialized = true;
}
Assigning correct min/max values at a build time fixes a problem.
Plus, a bit of optimization: Setting of default min/max values for the
given type at a run time might be eliminated.
* elf/dl-tunables.c (do_tunable_update_val): Range checking fix.
* scripts/gen-tunables.awk: Set unspecified minval and/or maxval
values to correct default value for given type.
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ELF objects generated with "objcopy --only-keep-debug" have
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
DYNAMIC 0x0+e28 0x0+200e40 0x0+200e40 0x0+ 0x0+1a0 RW 0x8
with 0 file size. ld.so should skip such PT_DYNAMIC segments.
Without a PT_DYNAMIC segment the loading of the shared object will
fail, and therefore ldd on such objects will also fail instead of
crashing. This provides better diagnostics for tooling that is
attempting to inspect the invalid shared objects which may just
contain debug information.
[BZ #22101]
* elf/Makefile (tests): Add tst-debug1.
($(objpfx)tst-debug1): New.
($(objpfx)tst-debug1.out): Likewise.
($(objpfx)tst-debug1mod1.so): Likewise.
* elf/dl-load.c (_dl_map_object_from_fd): Skip PT_DYNAMIC segment
with p_filesz == 0.
* elf/tst-debug1.c: New file.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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glibc fails to build with GCC mainline for SPARC because of the use of
manually-created IFUNCs, which fail the tests of compatibility of
function alias types. This patch changes sparc-ifunc.h to use the
generic __ifunc in defining sparc_libm_ifunc. The generic __ifunc can
use the GCC ifunc attribute when available, so ensuring
type-correctness as well as better debug info than when setting symbol
types in asm statements.
Note that for this to fix the build with GCC mainline the GCC patch
<https://gcc.gnu.org/ml/gcc-patches/2017-09/msg01779.html>, or
building GCC with --enable-gnu-indirect-function, is also needed.
Tested (compilation only) with build-many-glibcs.py (sparc64-linux-gnu
and sparcv9-linux-gnu, with GCC 8 with the above patch, and also with
GCC 7).
* sysdeps/sparc/sparc-ifunc.h [!__ASSEMBLER__] (sparc_libm_ifunc):
Define using __ifunc.
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Remove all entries for expf() and exp2f() and regenerate them.
* sysdeps/powerpc/fpu/libm-test-ulps: Regenerate expf() and
exp2f() values.
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