Move some float128 symbol version definitions.
With support for _Float128 functions on platforms where that type has
the same ABI as long double, as well as on platforms where it is
ABI-distinct, those functions will need to be exported from glibc's
shared libraries at appropriate symbol versions in each case.
This patch avoids duplication of lists of symbols to export by moving
the symbols other than __* to math/Versions and stdlib/Versions.
There, they are conditional on <float128-abi.h> defining
FLOAT128_VERSION and a default version of that header is added that
does not define that macro. Enabling the float128 function aliases
will then include adding a sysdeps/ieee754/ldbl-128/float128-abi.h
that defines FLOAT128_VERSION to GLIBC_2.27. Symbols __* remain in
sysdeps/ieee754/float128/Versions; those symbols should be present
only once per floating-point format, not once per type.
Note that if any platforms currently lacking support for a type with
binary128 format get glibc support for such a type in future (whether
only as _Float128, or also as a new long double format), and new libm
functions (present for all types) have been added by then, additional
macros will be needed to allow such functions to get a version of the
form "GLIBC_2.28 if the platform had _Float128 support by then, or the
later version at which that platform had _Float128 support added".
This is not however a preexisting condition, but would have applied
equally to the existing support for _Float128 as an ABI-distinct
type. New all-type libm functions should just be added to the
appropriate symbol version (currently GLIBC_2.27) for all types, with
such special-case handling for _Float128 versions (and _Float64x as
well in future) waiting until someone actually wants to add support
for _Float128 to an existing platform after a release in which that
platform and a post-2.26 libm function had support but that platform
lacked _Float128 support.
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by this patch. Also tested in conjunction
with the remaining changes to enable float128 aliases.
* sysdeps/generic/float128-abi.h: New file.
* sysdeps/ieee754/float128/Versions (FLOAT128_VERSION): Move
non-__prefixed symbols to ....
* math/Versions: ... here. Include <float128-abi.h>.
* stdlib/Versions ... and here. Include <float128-abi.h>
2017-10-16 22:04:42 +00:00
|
|
|
%include <float128-abi.h>
|
1998-07-02 22:51:40 +00:00
|
|
|
libc {
|
|
|
|
GLIBC_2.0 {
|
|
|
|
# functions with required interface outside normal name space
|
|
|
|
__xpg_basename;
|
|
|
|
|
|
|
|
# functions used in inline functions or macros
|
2017-04-20 20:35:21 +00:00
|
|
|
__strtod_internal; __strtof_internal; __strtold_internal;
|
|
|
|
__strtol_internal; __strtoll_internal;
|
|
|
|
__strtoul_internal; __strtoull_internal;
|
|
|
|
# functions formerly so used (compatibility symbols)
|
|
|
|
__strtoq_internal; __strtouq_internal;
|
1998-07-02 22:51:40 +00:00
|
|
|
|
2012-07-25 17:46:22 +00:00
|
|
|
# compatibility symbol
|
2002-02-19 17:43:23 +00:00
|
|
|
__secure_getenv;
|
1998-07-02 22:51:40 +00:00
|
|
|
|
|
|
|
# a*
|
|
|
|
a64l; abort; abs; atexit; atof; atoi; atol; atoll;
|
|
|
|
|
|
|
|
# b*
|
|
|
|
bsearch;
|
|
|
|
|
|
|
|
# c*
|
|
|
|
canonicalize_file_name; clearenv;
|
|
|
|
|
|
|
|
# d*
|
|
|
|
div; drand48; drand48_r;
|
|
|
|
|
|
|
|
# e*
|
|
|
|
erand48; erand48_r; exit;
|
|
|
|
|
|
|
|
# g*
|
|
|
|
getenv; getsubopt;
|
|
|
|
|
|
|
|
# i*
|
|
|
|
initstate; initstate_r;
|
|
|
|
|
|
|
|
# l*
|
|
|
|
l64a; labs; lcong48; lcong48_r; ldiv; llabs; lldiv; lrand48; lrand48_r;
|
|
|
|
|
|
|
|
# m*
|
|
|
|
mblen; mbrlen; mbrtowc; mbsinit; mbsnrtowcs; mbsrtowcs; mbstowcs;
|
2021-07-07 13:44:00 +00:00
|
|
|
mbtowc; mcount; mrand48; mrand48_r;
|
1998-07-02 22:51:40 +00:00
|
|
|
|
|
|
|
# n*
|
|
|
|
nrand48; nrand48_r;
|
|
|
|
|
|
|
|
# o*
|
|
|
|
on_exit;
|
|
|
|
|
|
|
|
# p*
|
|
|
|
putenv;
|
|
|
|
|
|
|
|
# q*
|
|
|
|
qsort;
|
|
|
|
|
|
|
|
# r*
|
|
|
|
rand; rand_r; random; random_r; realpath; rpmatch;
|
|
|
|
|
|
|
|
# s*
|
|
|
|
seed48; seed48_r; setcontext; setenv; setstate; setstate_r; srand; srand48;
|
|
|
|
srand48_r; srandom; srandom_r; step; strfmon; strtod; strtof; strtol;
|
|
|
|
strtold; strtoll; strtoq; strtoul; strtoull; strtouq; system;
|
|
|
|
|
|
|
|
# u*
|
|
|
|
unsetenv;
|
|
|
|
|
|
|
|
# w*
|
|
|
|
wcstombs; wctomb;
|
|
|
|
}
|
|
|
|
GLIBC_2.1 {
|
|
|
|
# a*
|
|
|
|
addseverity;
|
|
|
|
|
|
|
|
# f*
|
|
|
|
fmtmsg;
|
|
|
|
|
|
|
|
# g*
|
|
|
|
getcontext;
|
|
|
|
|
|
|
|
# m*
|
|
|
|
makecontext;
|
|
|
|
|
|
|
|
# s*
|
|
|
|
strtoimax; strtoumax; swapcontext;
|
|
|
|
}
|
1999-02-07 12:50:11 +00:00
|
|
|
GLIBC_2.1.1 {
|
|
|
|
# _*
|
|
|
|
_Exit;
|
|
|
|
|
|
|
|
# i*
|
|
|
|
imaxabs; imaxdiv;
|
|
|
|
}
|
1999-12-27 21:50:29 +00:00
|
|
|
GLIBC_2.1.3 {
|
|
|
|
# used by new G++ ABI
|
|
|
|
__cxa_atexit; __cxa_finalize;
|
|
|
|
}
|
2002-07-11 16:34:20 +00:00
|
|
|
GLIBC_2.3 {
|
|
|
|
# Silent change in SUS.
|
|
|
|
realpath;
|
|
|
|
}
|
2007-11-13 17:21:43 +00:00
|
|
|
GLIBC_2.8 {
|
|
|
|
qsort_r;
|
|
|
|
}
|
2009-03-08 19:53:12 +00:00
|
|
|
GLIBC_2.10 {
|
|
|
|
quick_exit; __cxa_at_quick_exit;
|
|
|
|
}
|
2012-07-25 17:46:22 +00:00
|
|
|
GLIBC_2.17 {
|
|
|
|
secure_getenv;
|
|
|
|
}
|
2013-02-18 13:38:21 +00:00
|
|
|
GLIBC_2.18 {
|
|
|
|
__cxa_thread_atexit_impl;
|
|
|
|
}
|
2016-06-06 18:20:58 +00:00
|
|
|
GLIBC_2.24 {
|
|
|
|
quick_exit;
|
|
|
|
}
|
2016-06-28 20:30:42 +00:00
|
|
|
GLIBC_2.25 {
|
|
|
|
# s*
|
|
|
|
strfromd; strfromf; strfroml;
|
2016-12-12 16:28:03 +00:00
|
|
|
getrandom; getentropy;
|
2016-06-28 20:30:42 +00:00
|
|
|
}
|
Move some float128 symbol version definitions.
With support for _Float128 functions on platforms where that type has
the same ABI as long double, as well as on platforms where it is
ABI-distinct, those functions will need to be exported from glibc's
shared libraries at appropriate symbol versions in each case.
This patch avoids duplication of lists of symbols to export by moving
the symbols other than __* to math/Versions and stdlib/Versions.
There, they are conditional on <float128-abi.h> defining
FLOAT128_VERSION and a default version of that header is added that
does not define that macro. Enabling the float128 function aliases
will then include adding a sysdeps/ieee754/ldbl-128/float128-abi.h
that defines FLOAT128_VERSION to GLIBC_2.27. Symbols __* remain in
sysdeps/ieee754/float128/Versions; those symbols should be present
only once per floating-point format, not once per type.
Note that if any platforms currently lacking support for a type with
binary128 format get glibc support for such a type in future (whether
only as _Float128, or also as a new long double format), and new libm
functions (present for all types) have been added by then, additional
macros will be needed to allow such functions to get a version of the
form "GLIBC_2.28 if the platform had _Float128 support by then, or the
later version at which that platform had _Float128 support added".
This is not however a preexisting condition, but would have applied
equally to the existing support for _Float128 as an ABI-distinct
type. New all-type libm functions should just be added to the
appropriate symbol version (currently GLIBC_2.27) for all types, with
such special-case handling for _Float128 versions (and _Float64x as
well in future) waiting until someone actually wants to add support
for _Float128 to an existing platform after a release in which that
platform and a post-2.26 libm function had support but that platform
lacked _Float128 support.
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by this patch. Also tested in conjunction
with the remaining changes to enable float128 aliases.
* sysdeps/generic/float128-abi.h: New file.
* sysdeps/ieee754/float128/Versions (FLOAT128_VERSION): Move
non-__prefixed symbols to ....
* math/Versions: ... here. Include <float128-abi.h>.
* stdlib/Versions ... and here. Include <float128-abi.h>
2017-10-16 22:04:42 +00:00
|
|
|
%ifdef FLOAT128_VERSION
|
|
|
|
FLOAT128_VERSION {
|
|
|
|
strfromf128;
|
|
|
|
strtof128;
|
|
|
|
strtof128_l;
|
|
|
|
}
|
|
|
|
%endif
|
Add _Float64x function aliases.
This patch continues filling out TS 18661-3 support by adding *f64x
function aliases on platforms with _Float64x support. (It so happens
the set of such platforms is exactly the same as the set of platforms
with _Float128 support, although on x86_64, x86 and ia32 the _Float64x
format is Intel extended rather than binary128.) The API provided
corresponds exactly to that provided for _Float128, mostly coming from
TS 18661-3. As these functions always alias those for another type
(long double, _Float128 or both), __* function names are not provided,
as in other cases of alias types.
Given the preparation done in previous patches, this one just enables
the feature via Makeconfig and bits/floatn.h, adds symbol versions,
and updates documentation and ABI baselines. The symbol versions are
present unconditionally as GLIBC_2.27 in the relevant Versions files,
as it's OK for those to specify versions for functions that may not be
present in some configurations; no additional complexity is needed
unless in future some configuration gains support for this type that
didn't have such support in 2.27. The Makeconfig additions for ia64
and x86 aren't strictly needed, as those configurations also get
float64x-alias-fcts definitions from
sysdeps/ieee754/float128/Makeconfig, but still seem appropriate given
that _Float64x is not _Float128 for those configurations.
A libm-test-ulps update for x86 is included. This is because
bits/mathinline.h does not have _Float64x support added and for two
functions the use of out-of-line functions results in increased ulps
(ifloat64x shares ulps with ildouble / ifloat128 as appropriate).
Given that we'd like generally to eliminate bits/mathinline.h
optimizations, preferring to have such optimizations in GCC instead,
it seems reasonable not to add such support there for new types. GCC
support for _FloatN / _FloatNx built-in functions is limited, but has
been improved in GCC 8, and at some point I hope the full set of libm
built-in functions in GCC, and other optimizations with
per-floating-type aspects, will be enabled for all _FloatN / _FloatNx
types.
Tested for x86_64 and x86, and with build-many-glibcs.py, with both
GCC 6 and GCC 7.
* sysdeps/ia64/Makeconfig (float64x-alias-fcts): New variable.
* sysdeps/ieee754/float128/Makeconfig (float64x-alias-fcts):
Likewise.
* sysdeps/ieee754/ldbl-128/Makeconfig (float64x-alias-fcts):
Likewise.
* sysdeps/x86/Makeconfig: New file.
* bits/floatn-common.h (__HAVE_FLOAT64X): Remove macro.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* bits/floatn.h (__HAVE_FLOAT64X): New macro.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/ia64/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/ieee754/ldbl-128/bits/floatn.h (__HAVE_FLOAT64X):
Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/mips/ieee754/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/powerpc/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/x86/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* manual/math.texi (Mathematics): Document support for _Float64x.
* math/Versions (GLIBC_2.27): Add _Float64x functions.
* stdlib/Versions (GLIBC_2.27): Likewise.
* wcsmbs/Versions (GLIBC_2.27): Likewise.
* sysdeps/unix/sysv/linux/aarch64/libc.abilist: Update.
* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
* sysdeps/i386/fpu/libm-test-ulps: Likewise.
* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
2017-11-27 14:16:47 +00:00
|
|
|
GLIBC_2.27 {
|
2017-12-06 00:58:03 +00:00
|
|
|
# _Float64x functions, only present for some configurations.
|
Add _Float64x function aliases.
This patch continues filling out TS 18661-3 support by adding *f64x
function aliases on platforms with _Float64x support. (It so happens
the set of such platforms is exactly the same as the set of platforms
with _Float128 support, although on x86_64, x86 and ia32 the _Float64x
format is Intel extended rather than binary128.) The API provided
corresponds exactly to that provided for _Float128, mostly coming from
TS 18661-3. As these functions always alias those for another type
(long double, _Float128 or both), __* function names are not provided,
as in other cases of alias types.
Given the preparation done in previous patches, this one just enables
the feature via Makeconfig and bits/floatn.h, adds symbol versions,
and updates documentation and ABI baselines. The symbol versions are
present unconditionally as GLIBC_2.27 in the relevant Versions files,
as it's OK for those to specify versions for functions that may not be
present in some configurations; no additional complexity is needed
unless in future some configuration gains support for this type that
didn't have such support in 2.27. The Makeconfig additions for ia64
and x86 aren't strictly needed, as those configurations also get
float64x-alias-fcts definitions from
sysdeps/ieee754/float128/Makeconfig, but still seem appropriate given
that _Float64x is not _Float128 for those configurations.
A libm-test-ulps update for x86 is included. This is because
bits/mathinline.h does not have _Float64x support added and for two
functions the use of out-of-line functions results in increased ulps
(ifloat64x shares ulps with ildouble / ifloat128 as appropriate).
Given that we'd like generally to eliminate bits/mathinline.h
optimizations, preferring to have such optimizations in GCC instead,
it seems reasonable not to add such support there for new types. GCC
support for _FloatN / _FloatNx built-in functions is limited, but has
been improved in GCC 8, and at some point I hope the full set of libm
built-in functions in GCC, and other optimizations with
per-floating-type aspects, will be enabled for all _FloatN / _FloatNx
types.
Tested for x86_64 and x86, and with build-many-glibcs.py, with both
GCC 6 and GCC 7.
* sysdeps/ia64/Makeconfig (float64x-alias-fcts): New variable.
* sysdeps/ieee754/float128/Makeconfig (float64x-alias-fcts):
Likewise.
* sysdeps/ieee754/ldbl-128/Makeconfig (float64x-alias-fcts):
Likewise.
* sysdeps/x86/Makeconfig: New file.
* bits/floatn-common.h (__HAVE_FLOAT64X): Remove macro.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* bits/floatn.h (__HAVE_FLOAT64X): New macro.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/ia64/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/ieee754/ldbl-128/bits/floatn.h (__HAVE_FLOAT64X):
Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/mips/ieee754/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/powerpc/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/x86/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* manual/math.texi (Mathematics): Document support for _Float64x.
* math/Versions (GLIBC_2.27): Add _Float64x functions.
* stdlib/Versions (GLIBC_2.27): Likewise.
* wcsmbs/Versions (GLIBC_2.27): Likewise.
* sysdeps/unix/sysv/linux/aarch64/libc.abilist: Update.
* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
* sysdeps/i386/fpu/libm-test-ulps: Likewise.
* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
2017-11-27 14:16:47 +00:00
|
|
|
strfromf64x;
|
|
|
|
strtof64x;
|
|
|
|
strtof64x_l;
|
2017-12-07 00:48:31 +00:00
|
|
|
# _Float32, _Float64 and _Float32x functions, for all configurations.
|
|
|
|
strfromf32; strfromf64; strfromf32x;
|
|
|
|
strtof32; strtof64; strtof32x;
|
|
|
|
strtof32_l; strtof64_l; strtof32x_l;
|
Add _Float64x function aliases.
This patch continues filling out TS 18661-3 support by adding *f64x
function aliases on platforms with _Float64x support. (It so happens
the set of such platforms is exactly the same as the set of platforms
with _Float128 support, although on x86_64, x86 and ia32 the _Float64x
format is Intel extended rather than binary128.) The API provided
corresponds exactly to that provided for _Float128, mostly coming from
TS 18661-3. As these functions always alias those for another type
(long double, _Float128 or both), __* function names are not provided,
as in other cases of alias types.
Given the preparation done in previous patches, this one just enables
the feature via Makeconfig and bits/floatn.h, adds symbol versions,
and updates documentation and ABI baselines. The symbol versions are
present unconditionally as GLIBC_2.27 in the relevant Versions files,
as it's OK for those to specify versions for functions that may not be
present in some configurations; no additional complexity is needed
unless in future some configuration gains support for this type that
didn't have such support in 2.27. The Makeconfig additions for ia64
and x86 aren't strictly needed, as those configurations also get
float64x-alias-fcts definitions from
sysdeps/ieee754/float128/Makeconfig, but still seem appropriate given
that _Float64x is not _Float128 for those configurations.
A libm-test-ulps update for x86 is included. This is because
bits/mathinline.h does not have _Float64x support added and for two
functions the use of out-of-line functions results in increased ulps
(ifloat64x shares ulps with ildouble / ifloat128 as appropriate).
Given that we'd like generally to eliminate bits/mathinline.h
optimizations, preferring to have such optimizations in GCC instead,
it seems reasonable not to add such support there for new types. GCC
support for _FloatN / _FloatNx built-in functions is limited, but has
been improved in GCC 8, and at some point I hope the full set of libm
built-in functions in GCC, and other optimizations with
per-floating-type aspects, will be enabled for all _FloatN / _FloatNx
types.
Tested for x86_64 and x86, and with build-many-glibcs.py, with both
GCC 6 and GCC 7.
* sysdeps/ia64/Makeconfig (float64x-alias-fcts): New variable.
* sysdeps/ieee754/float128/Makeconfig (float64x-alias-fcts):
Likewise.
* sysdeps/ieee754/ldbl-128/Makeconfig (float64x-alias-fcts):
Likewise.
* sysdeps/x86/Makeconfig: New file.
* bits/floatn-common.h (__HAVE_FLOAT64X): Remove macro.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* bits/floatn.h (__HAVE_FLOAT64X): New macro.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/ia64/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/ieee754/ldbl-128/bits/floatn.h (__HAVE_FLOAT64X):
Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/mips/ieee754/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/powerpc/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* sysdeps/x86/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
* manual/math.texi (Mathematics): Document support for _Float64x.
* math/Versions (GLIBC_2.27): Add _Float64x functions.
* stdlib/Versions (GLIBC_2.27): Likewise.
* wcsmbs/Versions (GLIBC_2.27): Likewise.
* sysdeps/unix/sysv/linux/aarch64/libc.abilist: Update.
* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
* sysdeps/i386/fpu/libm-test-ulps: Likewise.
* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
2017-11-27 14:16:47 +00:00
|
|
|
}
|
stdlib: Add arc4random, arc4random_buf, and arc4random_uniform (BZ #4417)
The implementation is based on scalar Chacha20 with per-thread cache.
It uses getrandom or /dev/urandom as fallback to get the initial entropy,
and reseeds the internal state on every 16MB of consumed buffer.
To improve performance and lower memory consumption the per-thread cache
is allocated lazily on first arc4random functions call, and if the
memory allocation fails getentropy or /dev/urandom is used as fallback.
The cache is also cleared on thread exit iff it was initialized (so if
arc4random is not called it is not touched).
Although it is lock-free, arc4random is still not async-signal-safe
(the per thread state is not updated atomically).
The ChaCha20 implementation is based on RFC8439 [1], omitting the final
XOR of the keystream with the plaintext because the plaintext is a
stream of zeros. This strategy is similar to what OpenBSD arc4random
does.
The arc4random_uniform is based on previous work by Florian Weimer,
where the algorithm is based on Jérémie Lumbroso paper Optimal Discrete
Uniform Generation from Coin Flips, and Applications (2013) [2], who
credits Donald E. Knuth and Andrew C. Yao, The complexity of nonuniform
random number generation (1976), for solving the general case.
The main advantage of this method is the that the unit of randomness is not
the uniform random variable (uint32_t), but a random bit. It optimizes the
internal buffer sampling by initially consuming a 32-bit random variable
and then sampling byte per byte. Depending of the upper bound requested,
it might lead to better CPU utilization.
Checked on x86_64-linux-gnu, aarch64-linux, and powerpc64le-linux-gnu.
Co-authored-by: Florian Weimer <fweimer@redhat.com>
Reviewed-by: Yann Droneaud <ydroneaud@opteya.com>
[1] https://datatracker.ietf.org/doc/html/rfc8439
[2] https://arxiv.org/pdf/1304.1916.pdf
2022-07-21 13:04:59 +00:00
|
|
|
GLIBC_2.36 {
|
|
|
|
arc4random;
|
|
|
|
arc4random_buf;
|
|
|
|
arc4random_uniform;
|
|
|
|
}
|
2022-08-10 06:35:41 +00:00
|
|
|
GLIBC_2.37 {
|
|
|
|
}
|
C2x strtol binary constant handling
C2x adds binary integer constants starting with 0b or 0B, and supports
those constants in strtol-family functions when the base passed is 0
or 2. Implement that strtol support for glibc.
As discussed at
<https://sourceware.org/pipermail/libc-alpha/2020-December/120414.html>,
this is incompatible with previous C standard versions, in that such
an input string starting with 0b or 0B was previously required to be
parsed as 0 (with the rest of the string unprocessed). Thus, as
proposed there, this patch adds 20 new __isoc23_* functions with
appropriate header redirection support. This patch does *not* do
anything about scanf %i (which will need 12 new functions per long
double variant, so 12, 24 or 36 depending on the glibc configuration),
instead leaving that for a future patch. The function names would
remain as __isoc23_* even if C2x ends up published in 2024 rather than
2023.
Making this change leads to the question of what should happen to
internal uses of these functions in glibc and its tests. The header
redirection (which applies for _GNU_SOURCE or any other feature test
macros enabling C2x features) has the effect of redirecting internal
uses but without those uses then ending up at a hidden alias (see the
comment in include/stdio.h about interaction with libc_hidden_proto).
It seems desirable for the default for internal uses to be the same
versions used by normal code using _GNU_SOURCE, so rather than doing
anything to disable that redirection, similar macro definitions to
those in include/stdio.h are added to the include/ headers for the new
functions.
Given that the default for uses in glibc is for the redirections to
apply, the next question is whether the C2x semantics are correct for
all those uses. Uses with the base fixed to 10, 16 or any other value
other than 0 or 2 can be ignored. I think this leaves the following
internal uses to consider (an important consideration for review of
this patch will be both whether this list is complete and whether my
conclusions on all entries in it are correct):
benchtests/bench-malloc-simple.c
benchtests/bench-string.h
elf/sotruss-lib.c
math/libm-test-support.c
nptl/perf.c
nscd/nscd_conf.c
nss/nss_files/files-parse.c
posix/tst-fnmatch.c
posix/wordexp.c
resolv/inet_addr.c
rt/tst-mqueue7.c
soft-fp/testit.c
stdlib/fmtmsg.c
support/support_test_main.c
support/test-container.c
sysdeps/pthread/tst-mutex10.c
I think all of these places are OK with the new semantics, except for
resolv/inet_addr.c, where the POSIX semantics of inet_addr do not
allow for binary constants; thus, I changed that file (to use
__strtoul_internal, whose semantics are unchanged) and added a test
for this case. In the case of posix/wordexp.c I think accepting
binary constants is OK since POSIX explicitly allows additional forms
of shell arithmetic expressions, and in stdlib/fmtmsg.c SEV_LEVEL is
not in POSIX so again I think accepting binary constants is OK.
Functions such as __strtol_internal, which are only exported for
compatibility with old binaries from when those were used in inline
functions in headers, have unchanged semantics; the __*_l_internal
versions (purely internal to libc and not exported) have a new
argument to specify whether to accept binary constants.
As well as for the standard functions, the header redirection also
applies to the *_l versions (GNU extensions), and to legacy functions
such as strtoq, to avoid confusing inconsistency (the *q functions
redirect to __isoc23_*ll rather than needing their own __isoc23_*
entry points). For the functions that are only declared with
_GNU_SOURCE, this means the old versions are no longer available for
normal user programs at all. An internal __GLIBC_USE_C2X_STRTOL macro
is used to control the redirections in the headers, and cases in glibc
that wish to avoid the redirections - the function implementations
themselves and the tests of the old versions of the GNU functions -
then undefine and redefine that macro to allow the old versions to be
accessed. (There would of course be greater complexity should we wish
to make any of the old versions into compat symbols / avoid them being
defined at all for new glibc ABIs.)
strtol_l.c has some similarity to strtol.c in gnulib, but has already
diverged some way (and isn't listed at all at
https://sourceware.org/glibc/wiki/SharedSourceFiles unlike strtoll.c
and strtoul.c); I haven't made any attempts at gnulib compatibility in
the changes to that file.
I note incidentally that inttypes.h and wchar.h are missing the
__nonnull present on declarations of this family of functions in
stdlib.h; I didn't make any changes in that regard for the new
declarations added.
2023-02-16 23:02:40 +00:00
|
|
|
GLIBC_2.38 {
|
|
|
|
__isoc23_strtol;
|
|
|
|
__isoc23_strtoll;
|
|
|
|
__isoc23_strtoul;
|
|
|
|
__isoc23_strtoull;
|
|
|
|
__isoc23_strtoimax;
|
|
|
|
__isoc23_strtoumax;
|
|
|
|
}
|
Update.
2002-02-01 Jakub Jelinek <jakub@redhat.com>
* Versions.def (libc): Add GLIBC_PRIVATE.
(libdb, libnss_db, libdb1): Remove.
(libnss_compat, libnss_dns, libnss_files, libnss_hesiod, libnss_nis,
libnss_nisplus): Move all symbols to GLIBC_PRIVATE.
(libpthread): Add GLIBC_PRIVATE.
(libresolv): Likewise, remove GLIBC_2.1.
(ld): Add GLIBC_PRIVATE, remove GLIBC_2.1.1, GLIBC_2.2, GLIBC_2.2.1,
GLIBC_2.2.3, GLIBC_2.3.
* catgets/Versions (__open_catalog): Move to GLIBC_PRIVATE.
* elf/Versions (_dl_open, _dl_close, _dl_addr, _dl_init_first,
_dl_sym, _dl_vsym): Likewise.
(__libc_enable_secure, __libc_stack_end, _dl_argv, _dl_catch_error,
_dl_check_all_versions, _dl_check_map_versions, _dl_debug_initialize,
_dl_debug_printf, _dl_debug_state, _dl_dst_count, _dl_dst_substitute,
_dl_init, _dl_lookup_symbol, _dl_lookup_symbol_skip,
_dl_lookup_versioned_symbol, _dl_lookup_versioned_symbol_skip,
_dl_map_object, _dl_map_object_deps, _dl_out_of_memory,
_dl_relocate_object, _dl_signal_error, _dl_start_profile,
_dl_starting_up, _dl_sysdep_start, _dl_unload_cache, _rtld_global):
Likewise.
(_dl_object_relocation_scope): Remove.
* hesiod/Versions: Move all symbols to GLIBC_PRIVATE.
* iconv/Versions (__gconv_alias_db, __gconv_modules_db,
__gconv_cache): Move to GLIBC_PRIVATE.
* inet/Versions (__internal_endnetgrent, __internal_getnetgrent_r,
__internal_setnetgrent): Likewise.
* io/Versions (__libc_open, __libc_close, __libc_read, __libc_write,
__libc_lseek, __libc_fcntl, __libc_open64, __libc_lseek64): Likewise.
* locale/Versions (__collate_element_hash, __collate_element_strings,
__collate_symbol_classes, __collate_symbol_hash,
__collate_symbol_strings, _nl_current_LC_COLLATE,
_nl_current_LC_CTYPE): Likewise.
* misc/Versions (__libc_fsync, __libc_msync): Likewise.
* nis/Versions (libnss_compat): Move all symbols to GLIBC_PRIVATE.
(libnss_nis, libnss_nisplus): Likewise.
* nss/Versions (_nss_files_parse_grent, _nss_files_parse_pwent,
_nss_files_parse_spent): Move to GLIBC_PRIVATE.
(libnss_files): Move all symbols to GLIBC_PRIVATE.
* posix/Versions (__libc_wait, __libc_waitpid, __libc_pause,
__libc_nanosleep, __libc_fork, __libc_pread, __libc_pread64,
__libc_pwrite, __libc_pwrite64): Move to GLIBC_PRIVATE.
* resolv/Versions (__gai_sigqueue, __ns_name_unpack, __ns_name_ntop,
__ns_get16, __ns_samename): Likewise.
(libnss_dns): Move all symbols to GLIBC_PRIVATE.
* setjmp/Versions (__libc_longjmp, __libc_siglongjmp): Move to
GLIBC_PRIVATE.
* socket/Versions (__libc_accept, __libc_send, __libc_recvfrom,
__libc_recvmsg, __libc_sendmsg, __libc_recv, __libc_sendto,
__libc_connect): Likewise.
* stdio-common/Versions (_itoa_lower_digits, _itoa_upper_digits):
Likewise.
* stdlib/Versions (__libc_system): Likewise.
* sunrpc/Versions (__rpc_thread_destroy): Likewise.
* sysdeps/hppa/Versions: Move all symbols to GLIBC_PRIVATE.
* sysdeps/ia64/fpu/Versions: Likewise.
* sysdeps/ia64/Versions: Likewise.
* sysdeps/unix/sysv/linux/ia64/Versions: Likewise.
* sysdeps/unix/sysv/linux/i386/Versions (__modify_ldt): Move
to GLIBC_PRIVATE.
* sysdeps/unix/sysv/linux/x86_64/Versions (__modify_ldt): Likewise.
* sysdeps/unix/sysv/linux/Versions (__syscall_rt_sigqueueinfo,
__libc_sigaction): Likewise.
* termios/Versions (__libc_tcdrain): Likewise.
* misc/sys/cdefs (__attribute_noinline__): Define.
* elf/dl-lookup.c (_dl_do_lookup, _dl_do_lookup_versioned): Add
__attribute_noinline__.
* elf/Makefile (rtld-routines): Add dl-xstat64, dl-fxstat64.
* elf/dl-xstat64.c: New file.
* elf/dl-fxstat64.c: New file.
* sysdeps/unix/sysv/linux/fxstat64.c: If RTLD_STAT64 is defined,
don't export __fxstat64 at multiple versions.
* sysdeps/unix/sysv/linux/lxstat64.c: Similarly.
* sysdeps/unix/sysv/linux/xstat64.c: Similarly.
2002-02-01 23:24:05 +00:00
|
|
|
GLIBC_PRIVATE {
|
|
|
|
# functions which have an additional interface since they are
|
|
|
|
# are cancelable.
|
2002-02-28 20:15:06 +00:00
|
|
|
__libc_system;
|
2009-06-15 23:17:09 +00:00
|
|
|
# Variable which needs a dynamic symbol table entry.
|
|
|
|
__abort_msg;
|
2012-07-25 17:46:22 +00:00
|
|
|
# Used from other libraries
|
|
|
|
__libc_secure_getenv;
|
2013-02-18 13:38:21 +00:00
|
|
|
__call_tls_dtors;
|
Fix nan functions handling of payload strings (bug 16961, bug 16962).
The nan, nanf and nanl functions handle payload strings by doing e.g.:
if (tagp[0] != '\0')
{
char buf[6 + strlen (tagp)];
sprintf (buf, "NAN(%s)", tagp);
return strtod (buf, NULL);
}
This is an unbounded stack allocation based on the length of the
argument. Furthermore, if the argument starts with an n-char-sequence
followed by ')', that n-char-sequence is wrongly treated as
significant for determining the payload of the resulting NaN, when ISO
C says the call should be equivalent to strtod ("NAN", NULL), without
being affected by that initial n-char-sequence. This patch fixes both
those problems by using the __strtod_nan etc. functions recently
factored out of strtod etc. for that purpose, with those functions
being exported from libc at version GLIBC_PRIVATE.
Tested for x86_64, x86, mips64 and powerpc.
[BZ #16961]
[BZ #16962]
* math/s_nan.c (__nan): Use __strtod_nan instead of constructing a
string on the stack for strtod.
* math/s_nanf.c (__nanf): Use __strtof_nan instead of constructing
a string on the stack for strtof.
* math/s_nanl.c (__nanl): Use __strtold_nan instead of
constructing a string on the stack for strtold.
* stdlib/Versions (libc): Add __strtof_nan, __strtod_nan and
__strtold_nan to GLIBC_PRIVATE.
* math/test-nan-overflow.c: New file.
* math/test-nan-payload.c: Likewise.
* math/Makefile (tests): Add test-nan-overflow and
test-nan-payload.
2015-12-04 20:36:28 +00:00
|
|
|
__strtof_nan; __strtod_nan; __strtold_nan;
|
Update.
2002-02-01 Jakub Jelinek <jakub@redhat.com>
* Versions.def (libc): Add GLIBC_PRIVATE.
(libdb, libnss_db, libdb1): Remove.
(libnss_compat, libnss_dns, libnss_files, libnss_hesiod, libnss_nis,
libnss_nisplus): Move all symbols to GLIBC_PRIVATE.
(libpthread): Add GLIBC_PRIVATE.
(libresolv): Likewise, remove GLIBC_2.1.
(ld): Add GLIBC_PRIVATE, remove GLIBC_2.1.1, GLIBC_2.2, GLIBC_2.2.1,
GLIBC_2.2.3, GLIBC_2.3.
* catgets/Versions (__open_catalog): Move to GLIBC_PRIVATE.
* elf/Versions (_dl_open, _dl_close, _dl_addr, _dl_init_first,
_dl_sym, _dl_vsym): Likewise.
(__libc_enable_secure, __libc_stack_end, _dl_argv, _dl_catch_error,
_dl_check_all_versions, _dl_check_map_versions, _dl_debug_initialize,
_dl_debug_printf, _dl_debug_state, _dl_dst_count, _dl_dst_substitute,
_dl_init, _dl_lookup_symbol, _dl_lookup_symbol_skip,
_dl_lookup_versioned_symbol, _dl_lookup_versioned_symbol_skip,
_dl_map_object, _dl_map_object_deps, _dl_out_of_memory,
_dl_relocate_object, _dl_signal_error, _dl_start_profile,
_dl_starting_up, _dl_sysdep_start, _dl_unload_cache, _rtld_global):
Likewise.
(_dl_object_relocation_scope): Remove.
* hesiod/Versions: Move all symbols to GLIBC_PRIVATE.
* iconv/Versions (__gconv_alias_db, __gconv_modules_db,
__gconv_cache): Move to GLIBC_PRIVATE.
* inet/Versions (__internal_endnetgrent, __internal_getnetgrent_r,
__internal_setnetgrent): Likewise.
* io/Versions (__libc_open, __libc_close, __libc_read, __libc_write,
__libc_lseek, __libc_fcntl, __libc_open64, __libc_lseek64): Likewise.
* locale/Versions (__collate_element_hash, __collate_element_strings,
__collate_symbol_classes, __collate_symbol_hash,
__collate_symbol_strings, _nl_current_LC_COLLATE,
_nl_current_LC_CTYPE): Likewise.
* misc/Versions (__libc_fsync, __libc_msync): Likewise.
* nis/Versions (libnss_compat): Move all symbols to GLIBC_PRIVATE.
(libnss_nis, libnss_nisplus): Likewise.
* nss/Versions (_nss_files_parse_grent, _nss_files_parse_pwent,
_nss_files_parse_spent): Move to GLIBC_PRIVATE.
(libnss_files): Move all symbols to GLIBC_PRIVATE.
* posix/Versions (__libc_wait, __libc_waitpid, __libc_pause,
__libc_nanosleep, __libc_fork, __libc_pread, __libc_pread64,
__libc_pwrite, __libc_pwrite64): Move to GLIBC_PRIVATE.
* resolv/Versions (__gai_sigqueue, __ns_name_unpack, __ns_name_ntop,
__ns_get16, __ns_samename): Likewise.
(libnss_dns): Move all symbols to GLIBC_PRIVATE.
* setjmp/Versions (__libc_longjmp, __libc_siglongjmp): Move to
GLIBC_PRIVATE.
* socket/Versions (__libc_accept, __libc_send, __libc_recvfrom,
__libc_recvmsg, __libc_sendmsg, __libc_recv, __libc_sendto,
__libc_connect): Likewise.
* stdio-common/Versions (_itoa_lower_digits, _itoa_upper_digits):
Likewise.
* stdlib/Versions (__libc_system): Likewise.
* sunrpc/Versions (__rpc_thread_destroy): Likewise.
* sysdeps/hppa/Versions: Move all symbols to GLIBC_PRIVATE.
* sysdeps/ia64/fpu/Versions: Likewise.
* sysdeps/ia64/Versions: Likewise.
* sysdeps/unix/sysv/linux/ia64/Versions: Likewise.
* sysdeps/unix/sysv/linux/i386/Versions (__modify_ldt): Move
to GLIBC_PRIVATE.
* sysdeps/unix/sysv/linux/x86_64/Versions (__modify_ldt): Likewise.
* sysdeps/unix/sysv/linux/Versions (__syscall_rt_sigqueueinfo,
__libc_sigaction): Likewise.
* termios/Versions (__libc_tcdrain): Likewise.
* misc/sys/cdefs (__attribute_noinline__): Define.
* elf/dl-lookup.c (_dl_do_lookup, _dl_do_lookup_versioned): Add
__attribute_noinline__.
* elf/Makefile (rtld-routines): Add dl-xstat64, dl-fxstat64.
* elf/dl-xstat64.c: New file.
* elf/dl-fxstat64.c: New file.
* sysdeps/unix/sysv/linux/fxstat64.c: If RTLD_STAT64 is defined,
don't export __fxstat64 at multiple versions.
* sysdeps/unix/sysv/linux/lxstat64.c: Similarly.
* sysdeps/unix/sysv/linux/xstat64.c: Similarly.
2002-02-01 23:24:05 +00:00
|
|
|
}
|
1998-07-02 22:51:40 +00:00
|
|
|
}
|