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2018-02-01Update for 2.27 releaseDmitry V. Levin
2018-01-29libnsl: Turn remaining symbols into compat symbols [BZ #22701]Florian Weimer
2018-01-10hurd: Implement faccessat without AT_EACCESS flagSamuel Thibault
* hurd/hurd/fd.h: Include <fcntl.h> (__hurd_at_flags): New function. * hurd/lookup-at.c (__file_name_lookup_at): Replace flag computation with call to __hurd_at_flags. * include/unistd.h (__faccessat, __faccessat_noerrno): Add declaration. * sysdeps/mach/hurd/access.c (access_common): Move implementation to __faccessat (hurd_fail_seterrno, hurd_fail_noerrno): Move to sysdeps/mach/hurd/faccessat.c. (__access_noerrno): Use __faccessat_common instead of access_common. (__access): Likewise. * sysdeps/mach/hurd/euidaccess.c (__euidaccess): Replace implementation with a call to __faccessat. * sysdeps/mach/hurd/faccessat.c (faccessat): Rename into... (__faccessat_common): ... this. Move implementation of __access into it when AT_FLAGS does not contain AT_EACCESS. Make it call __hurd_at_flags, add reauthenticate_cwdir_at helper to implement AT mechanism. (__faccessat_noerrno): New function, just calls __faccessat_common. (__faccessat): New function, just calls __faccessat_common. (faccessat): Define weak alias.
2018-01-04elf: Support dlvsym within libc.soFlorian Weimer
This commit adds a new _dl_open_hook entry for dlvsym and implements the function using the existing dl_lookup_symbol_x function supplied by the dynamic loader. A new hook variable, _dl_open_hook2, is introduced, which should make this change suitable for backporting: For old statically linked binaries, __libc_dlvsym will always return NULL.
2018-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
2017-12-24Deprecate external use of libio.h and _G_config.h.Zack Weinberg
libio.h was originally the header for a set of supported GNU extensions, but they have not been maintained as such in many years, they are now standing in the way of improvements to stdio, and we don't think there are any remaining external users. _G_config.h was never intended for public use, but predates the bits convention. Move both of these headers into the bits directory and provide stubs at top level which issue deprecation warnings. The contents of (bits/)libio.h and (bits/)_G_config.h are still exposed to external software via stdio.h; changing that requires more complex surgery than I have time to attempt right now. * libio/libio.h, libio/_G_config.h: New stub headers which issue a deprecation warning and then include <bits/libio.h>, <bits/_G_config.h> respectively. * libio/libio.h: Rename the original version of this file to libio/bits/libio.h. Error out if not included by stdio.h or the stub libio.h. * include/libio.h: Move to include/bits. Forward to libio/bits/libio.h. * sysdeps/generic/_G_config.h: Move to top-level bits/. Error out if not included by bits/libio.h or the stub _G_config.h. * sysdeps/unix/sysv/linux/_G_config.h: Move to sysdeps/unix/sysv/linux/bits. Error out if not included by bits/libio.h or the stub _G_config.h. * libio/stdio.h: Include bits/libio.h, not libio.h. * libio/Makefile: Install bits/libio.h and bits/_G_config.h as well as libio.h and _G_config.h. * csu/init.c, libio/fmemopen.c, libio/iolibio.h, libio/oldfmemopen.c * libio/strfile.h, stdio-common/vfscanf.c * sysdeps/pthread/flockfile.c, sysdeps/pthread/funlockfile.c Include stdio.h, not _G_config.h nor libio.h. * libio/iofgetpos.c: Also rename fgetpos64 out of the way. * libio/iofsetpos.c: Also rename fsetpos64 out of the way. * scripts/check-installed-headers.sh: Skip libio.h and _G_config.h.
2017-11-28Properly compute offsets of note descriptor and next note [BZ #22370]H.J. Lu
A note header has 3 4-bytes fields, followed by note name and note descriptor. According to gABI, in a note entry, the note name field, not note name size, is padded for the note descriptor. And the note descriptor field, not note descriptor size, is padded for the next note entry. Notes are aligned to 4 bytes in 32-bit objects and 8 bytes in 64-bit objects. For all GNU notes, the name is "GNU" which is 4 bytes. They have the same format in the first 16 bytes in both 32-bit and 64-bit objects. They differ by note descriptor size and note type. So far, .note.ABI-tag and .note.gnu.build-id notes are always aligned to 4 bytes. The exsting codes compute the note size by aligning the note name size and note descriptor size to 4 bytes. It happens to produce the same value as the actual note size by luck since the name size is 4 and offset of the note descriptor is 16. But it will produce the wrong size when note alignment is 8 bytes in 64-bit objects. This patch defines ELF_NOTE_DESC_OFFSET and ELF_NOTE_NEXT_OFFSET to properly compute offsets of note descriptor and next note. It uses alignment of PT_NOTE segment to support both 4-byte and 8-byte note alignments in 64-bit objects. To handle PT_NOTE segments with incorrect alignment, which may lead to an infinite loop, if segment alignment is less than 4, we treate alignment as 4 bytes since some note segments have 0 or 1 byte alignment. [BZ #22370] * elf/dl-hwcaps.c (ROUND): Removed. (_dl_important_hwcaps): Replace ROUND with ELF_NOTE_DESC_OFFSET and ELF_NOTE_NEXT_OFFSET. * elf/dl-load.c (ROUND): Removed. (open_verify): Replace ROUND with ELF_NOTE_NEXT_OFFSET. * elf/readelflib.c (ROUND): Removed. (process_elf_file): Replace ROUND with ELF_NOTE_NEXT_OFFSET. * include/elf.h [!_ISOMAC]: Include <libc-pointer-arith.h>. [!_ISOMAC] (ELF_NOTE_DESC_OFFSET): New. [!_ISOMAC] (ELF_NOTE_NEXT_OFFSET): Likewise.
2017-11-23nss: Export nscd hash function as __nss_hash [BZ #22459]Florian Weimer
2017-11-22Obsolete p_secstodate.Joseph Myers
This patch, relative to a tree with <https://sourceware.org/ml/libc-alpha/2017-11/msg00797.html> (pending review) applied, obsoletes p_secstodate, making the underlying function __p_secstodate into a compat symbol not available for new binaries or ports. The calls in ns_print.c (part of incomplete handling of TKEY) are changed to use %lu to print times instead of trying to pretty-print the times any more. Tested for x86_64. * resolv/res_debug.c (p_secstodate): Condition definition on [SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_27)]. Define directly as __p_secstodate, and as a compat symbol. Do not use libresolv_hidden_def. * resolv/resolv.h (p_secstodate): Remove macro and function declaration. * resolv/ns_print.c (ns_sprintrrf): Print times with %lu, not using p_secstodate. * include/resolv.h (__p_secstodate): Do not use libresolv_hidden_proto. * resolv/Makefile (tests): Move tst-p_secstodate to .... (tests-internal): ... here. * resolv/tst-p_secstodate.c: Include <shlib-compat.h>. Condition all contents on [TEST_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_27)] and declare and use __p_secstodate and use compat_symbol_reference in that case. [!TEST_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_27)] (do_test): Add implementation returning 77.
2017-11-21Remove attribute_hidden for wchar ifunc symbols.Stefan Liebler
On s390 (31bit) various debug/tst-*chk* testcases are failing as the tests are ending with a segmentation fault. One test is e.g. calling wcsnrtombs in debug/tst-chk1.c:1549. The function wcsnrtombs itself calls __wcsnlen. This function is called via PLT! The PLT-stub itself loads the address from GOT (r12 is assumed to be the GOT-pointer). In this case the loaded address is zero and the following branch leads to the segmentation fault. Due to the attribute_hidden in commit 44af8a32c341672b5160fdc2839767e9a837ad26 "Mark internal wchar functions with attribute_hidden [BZ #18822]" for e.g. the __wcsnlen function, r12 is not loaded with the GOT-pointer in wcsnrtombs. On s390x (64bit), this __wcsnlen call is also using the PLT-stub. But it is not failing as the GOT-pointer is setup with larl-instruction by the PLT-stub itself. Note: On s390x/s390, __wcsnlen is an IFUNC symbol. On x86_64, __wcsnlen is also an IFUNC symbol and is called via PLT, too. Further IFUNC symbols on s390 which were marked as hidden by the mentioned commit are: __wcscat, __wcsncpy, __wcpncpy, __wcschrnul. This patch removes the attribute_hidden in wchar.h. Then the compiler setups e.g. r12 on s390 in order to call __wcsnlen via PLT. ChangeLog: * include/wchar.h (__wcsnlen, __wcscat, __wcsncpy, __wcpncpy, __wcschrnul): Remove attribute_hidden.
2017-11-13ld.so: Add architecture specific fieldsH.J. Lu
To support Intel Control-flow Enforcement Technology (CET) run-time control: 1. An architecture specific field in the writable ld.so namespace is needed to indicate if CET features are enabled at run-time. 2. An architecture specific field in struct link_map is needed if CET features are enabled in an ELF module. This patch adds dl-procruntime.c to the writable ld.so namespace and link_map.h to struct link_map. Tested with build-many-glibcs.py. * elf/dl-support.c: Include <dl-procruntime.c>. * include/link.h: Include <link_map.h>. * sysdeps/generic/dl-procruntime.c: New file. * sysdeps/generic/link_map.h: Likewise. * sysdeps/generic/ldsodefs.h: Include <dl-procruntime.c> in the writable ld.so namespace.
2017-11-09Add jmp_buf-macros.hH.J. Lu
Verify that sizes, alignments and field offsets of jmp_buf as well as sigjmp_buf are unchanged regardless how struct __jmp_buf_tag is defined. Since jmp_buf is target specific, jmp_buf-macros.h is added for each Linux target. A new target must provides its own jmp_buf-macros.h. TODO: Hurd needs to provide a jmp_buf-macros.h. Tested with build-many-glibcs.py. * include/setjmp.h [!_ISOMAC]: Include <stddef.h> and <jmp_buf-macros.h>. [!_ISOMAC] (STR_HELPER): New. [!_ISOMAC] (STR): Likewise. [!_ISOMAC] (TEST_SIZE): Likewise. [!_ISOMAC] (TEST_ALIGN): Likewise. [!_ISOMAC] (TEST_OFFSET): Likewise. [!_ISOMAC] Add _Static_assert to check sizes, alignments and field offsets of jmp_buf as well as sigjmp_buf. * sysdeps/unix/sysv/linux/aarch64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/alpha/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/arm/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/hppa/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/i386/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/ia64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/m68k/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/microblaze/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/nios2/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/sh/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/jmp_buf-macros.h: Likewise.
2017-11-07Handle more _FloatN, _FloatNx types in include/float.h.Joseph Myers
Continuing the preparation for additional _FloatN / _FloatNx type support, this patch adds support in include/float.h. This header defines macros for _Float128 properties when using compilers before GCC 7 that lack those macros in <float.h>. For testing _Float32 / _Float64 / _Float32x / _Float64x functions with older compilers, such macros need to be defined for those types as well; for the older compilers, those types will always be typedefs for another type, so the definitions can be in terms of the macros for that other type. Tested for x86_64. * include/float.h [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (FLT32_MANT_DIG): New macro. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (FLT32_DECIMAL_DIG): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (FLT32_DIG): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (FLT32_MIN_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (FLT32_MIN_10_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (FLT32_MAX_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (FLT32_MAX_10_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (FLT32_MAX): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (FLT32_EPSILON): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (FLT32_MIN): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (FLT32_TRUE_MIN): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64] (FLT64_MANT_DIG): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64] (FLT64_DECIMAL_DIG): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64] (FLT64_DIG): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64] (FLT64_MIN_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64] (FLT64_MIN_10_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64] (FLT64_MAX_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64] (FLT64_MAX_10_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64] (FLT64_MAX): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64] (FLT64_EPSILON): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64] (FLT64_MIN): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64] (FLT64_TRUE_MIN): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (FLT32X_MANT_DIG): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (FLT32X_DECIMAL_DIG): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (FLT32X_DIG): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (FLT32X_MIN_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (FLT32X_MIN_10_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (FLT32X_MAX_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (FLT32X_MAX_10_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (FLT32X_MAX): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (FLT32X_EPSILON): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (FLT32X_MIN): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (FLT32X_TRUE_MIN): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X] (FLT64X_MANT_DIG): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X] (FLT64X_DECIMAL_DIG): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X] (FLT64X_DIG): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X] (FLT64X_MIN_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X] (FLT64X_MIN_10_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X] (FLT64X_MAX_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X] (FLT64X_MAX_10_EXP): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X] (FLT64X_MAX): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X] (FLT64X_EPSILON): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X] (FLT64X_MIN): Likewise. [!__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X] (FLT64X_TRUE_MIN): Likewise.
2017-11-02<array_length.h>: New array_length and array_end macrosFlorian Weimer
2017-10-30Remove _Mlong_double_ etc. macros.Joseph Myers
math.h has a macro _Mlong_double_ for the type to use when declaring long double functions, and similar macros for other types. math/Makefile uses -D_Mlong_double_=double in the case of long double having the same ABI as double. This originates with: Mon Jul 8 13:37:40 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * math/math.h (_Mfloat_, _Mlong_double_): New macros, defined iff not already defined to float, long double. Use those macros for _Mdouble_ defns when including mathcalls.h. * math/Makefile [$(long-double-fcts) != yes] (CPPFLAGS): Append -D_Mlong_double_=double. However, math.h stopped declaring long double functions in the case of long double having the same ABI as double (and thus probably stopped actually needing the Makefile definition of _Mlong_double_) with: 1998-11-05 Ulrich Drepper <drepper@cygnus.com> * math/math.h: Unconditionally include bits/mathdef.h. Declare long double functions only if __NO_LONG_DOUBLE_MATH is not defined. * sysdeps/generic/bits/mathdef.h: Define only if __USE_ISOC9X. Define __NO_LONG_DOUBLE_MATH. * sysdeps/m68k/fpu/bits/mathdef.h: Define only if __USE_ISOC9X. * sysdeps/i386/fpu/bits/mathdef.h: Likewise. The declarations were since restored for compiling user code, but remain absent when _LIBC is defined, which is sufficient to avoid problems declaring function aliases of incompatible types. Thus the indirection through the _Mlong_double_ macro is not needed (probably since that 1998 patch), and this patch removes _Mlong_double_ and associated macros for other types, leaving only the macro _Mdouble_ which is actually used as the type for which a given inclusion of <bits/mathcalls.h> should declared functions. Tested for x86_64, and tested with build-many-glibcs.py that installed stripped shared libraries are unchanged by this patch. * math/math.h [!_Mfloat_] (_Mfloat_): Do not define. [!_Mlong_double_] (_Mlong_double_): Likewise. [!_Mfloat16_] (_Mfloat16_): Likewise. [!_Mfloat32_] (_Mfloat32_): Likewise. [!_Mfloat64_] (_Mfloat64_): Likewise. [!_Mfloat128_] (_Mfloat128_): Likewise. [!_Mfloat32x_] (_Mfloat32x_): Likewise. [!_Mfloat64x_] (_Mfloat64x_): Likewise. [!_Mfloat128x_] (_Mfloat128x_): Likewise. (_Mdouble_): Define without indirection through those macros. * math/complex.h [!_Mfloat_] (_Mfloat_): Do not define. [!_Mfloat128_] (_Mfloat128_): Likewise. [_Mlong_double_] (_Mlong_double_): Likewise. (_Mdouble_): Define without indirection through those macros. * math/Makefile [$(long-double-fcts) != yes] (math-CPPFLAGS): Do not add -D_Mlong_double_=double. * include/math.h [_ISOMAC] (_Mlong_double_): Do not undefine. * math/test-signgam-finite-c99.c (_Mlong_double_): Likewise.
2017-10-25Replace "if if " with "if " in commentsH.J. Lu
* include/alloc_buffer.h: Replace "if if " with "if " in comments. * sysdeps/mips/memcpy.S: Likkewise. * sysdeps/mips/memset.S: Likewise. * sysdeps/x86_64/fpu/multiarch/svml_s_sincosf16_core_avx512.S: Likewise. * sysdeps/x86_64/fpu/multiarch/svml_s_sincosf4_core_sse4.S: Likewise. * sysdeps/x86_64/fpu/multiarch/svml_s_sincosf8_core_avx2.S: Likewise.
2017-10-17Use __f128 to define FLT128_* constants in include/float.h for old GCC.Joseph Myers
When using compilers before GCC 7, include/float.h provides fallback definitions of FLT128_* constants. These definitions use 'Q' constant suffixes, which works for configurations with _Float128 ABI-distinct from long double, but not where it has the same ABI as long double. This patch changes the definitions to use the __f128 macro from <bits/floatn.h>, so allowing them to work in the non-distinct _Float128 case (where they are used in building glibc tests, not for building glibc itself) as well. Tested (a) with build-many-glibcs.py with GCC 6 (installed stripped shared libraries unchanged by the patch); (b) with build-many-glibcs.py with GCC 6 together with the main patch to enable float128 aliases; (c) for x86_64 with both GCC 6 and GCC 7. * include/float.h [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_MAX): Define using __f128. [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_EPSILON): Likewise. [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_MIN): Likewise. [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_TRUE_MIN): Likewise.
2017-10-16shlib-compat: Update documentation of the compat_symbol_reference macroCarlos O'Donell
2017-10-09Ensure C99 and C11 interfaces are available for C++ [BZ #21326]Jonathan Wakely
This patch ensures that the C99 and C11 features required by C++ are defined according to the value of the __cplusplus macro, and not just because G++ always defines _GNU_SOURCE. This will allow G++ to stop defining _GNU_SOURCE some day, without causing the C99 and C11 interfaces to disappear for C++ programs. [BZ #21326] * include/features.h [__cplusplus >= 201103] (__USE_ISOC99): Define. [__cplusplus >= 201703] (__USE_ISOCXX17, __USE_ISOC11): Define. * math/Makefile (test-math-cxx11): New test. * math/test-math-cxx11.cc: New file.
2017-10-04Don't use hidden visibility in libc.a with PIE on i386H.J. Lu
On i386, when multi-arch is enabled, all external functions must be called via PIC PLT in PIE, which requires setting up EBX register, since they may be IFUNC functions. * config.h.in (NO_HIDDEN_EXTERN_FUNC_IN_PIE): New. * include/libc-symbols.h (__hidden_proto_hiddenattr): Add check for PIC and NO_HIDDEN_EXTERN_FUNC_IN_PIE. * sysdeps/i386/configure.ac (NO_HIDDEN_EXTERN_FUNC_IN_PIE): New AC_DEFINE if multi-arch is enabled. * sysdeps/i386/configure: Regenerated.
2017-10-03Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDENSamuel Thibault
On the Hurd, the rtld needs to see its own dumb versions of a few functions (defined in sysdeps/mach/hurd/dl-sysdep.c) overridden by libc's versions once loaded. rtld should thus not have hidden attribute for these. To achieve this, the Hurd port used to just define NO_HIDDEN, which disables it completely. For now, this changes that to disabling it for all rtld functions, for simplicity. See Roland's comment on https://sourceware.org/bugzilla/show_bug.cgi?id=15605#c5 The ld.so numbers remain at 8 .rel.plt 000000c8 00000c24 00000c24 00000c24 2**2 CONTENTS, ALLOC, LOAD, READONLY, DATA 9 .plt 000001a0 00000cf0 00000cf0 00000cf0 2**4 CONTENTS, ALLOC, LOAD, READONLY, CODE 10 .plt.got 00000010 00000e90 00000e90 00000e90 2**3 CONTENTS, ALLOC, LOAD, READONLY, CODE 18 .got.plt 00000070 0002d000 0002d000 0002c000 2**2 CONTENTS, ALLOC, LOAD, DATA which is about 3 times as much as on Linux. The libc.so numbers get divided by 3 (the remainings are mostly RPC stub calls) * include/libc-symbols.h [NO_RTLD_HIDDEN] (rtld_hidden_proto, rtld_hidden_tls_proto, rtld_hidden_def, rtld_hidden_weak, rtld_hidden_rtld_hidden_ver, data_def, rtld_hidden_data_weak, rtld_hidden_data_ver): Define to empty. * include/assert.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__assert_fail, __assert_perror_fail): Likewise. * include/dirent.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__rewinddir): Likewise. * include/libc-internal.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__profile_frequency): Likewise. * include/setjmp.h (__sigsetjmp): Likewise. * include/signal.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__sigaction, __libc_sigaction): Likewise. * include/stdlib.h [NO_RTLD_HIDDEN] (unsetenv, __strtoul_internal): Do not set hidden attribute. * include/string.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__stpcpy, __strdup, __strerror_t, __strsep_g, memchr, memcmp, memcpy, memmove, memset, rawmemchr, stpcpy, strchr, strcmp, strlen, strnlen, strsep): Likewise. * include/sys/stat.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__fxstat, __fxstat64, __lxstat, __lxstat64, __xstat, __xstat64, __fxstatat64): Likewise. * include/sys/utsname.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__uname): Likewise. * include/sysdeps/generic/_itoa.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (_itoa_upper_digits, _itoa_lower_digits): Likewise. * sysdeps/mach/hurd/configure.ac (NO_HIDDEN): Do not set. (NO_RTLD_HIDDEN): Set. * sysdeps/mach/hurd/configure: Refresh. * config.h.in: Refresh.
2017-10-01Hide internal __glob64 function [BZ #18822]H.J. Lu
Hide internal __glob64 function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/glob.h (__glob64): Add libc_hidden_proto. * sysdeps/unix/sysv/linux/glob64.c (__glob64): Add libc_hidden_def.
2017-10-01Hide internal __init_misc function [BZ #18822]H.J. Lu
Hide internal __init_misc function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/libc-internal.h (__init_misc): Add attribute_hidden.
2017-10-01Hide internal __setfpucw function [BZ #18822]H.J. Lu
Hide internal __setfpucw function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/fpu_control.h (__setfpucw): Add attribute_hidden.
2017-10-01Hide internal __tcgetattr function [BZ #18822]H.J. Lu
Hide internal __tcgetattr function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/termios.h (__tcgetattr): Add libc_hidden_proto. * sysdeps/unix/bsd/tcgetattr.c (__tcgetattr): Add libc_hidden_def. * sysdeps/unix/sysv/linux/tcgetattr.c (__tcgetattr): Likewise. * termios/tcgetattr.c (__tcgetattr): Likewise.
2017-10-01Hide internal __setrlimit function [BZ #18822]H.J. Lu
Hide internal __setrlimit function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/sys/resource.h (__setrlimit): Add libc_hidden_proto. * resource/setrlimit.c (__setrlimit): Add libc_hidden_def. * sysdeps/mach/hurd/setrlimit.c (__setrlimit): Likewise. * sysdeps/unix/sysv/linux/setrlimit.c (__setrlimit): Likewise. * sysdeps/unix/sysv/linux/setrlimit64.c (__GI___setrlimit): New.
2017-10-01Hide internal __vstrfmon_l function [BZ #18822]H.J. Lu
Hide internal __vstrfmon_l function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/monetary.h (__vstrfmon_l): Add attribute_hidden.
2017-10-01Hide internal __sched_setparam function [BZ #18822]H.J. Lu
Hide internal __sched_setparam function to allow direct access within libc.so and libc.a without using GOT nor PLT. __GI___sched_setparam is defined when sysdeps/unix/syscalls.list is used to generate sched_setparam. Otherwise libc_hidden_def is needed explicitly. [BZ #18822] * include/sched.h (__sched_setparam): Add libc_hidden_proto. * posix/sched_setp.c (__sched_setparam): Add libc_hidden_def.
2017-10-01Hide internal __hasmntopt function [BZ #18822]H.J. Lu
Hide internal __hasmntopt function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/mntent.h (__hasmntopt): Add libc_hidden_proto. * misc/mntent_r.c (__hasmntopt): Add libc_hidden_def.
2017-10-01Hide internal __ifreq function [BZ #18822]H.J. Lu
Hide internal __ifreq function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/ifreq.h: New file. * sysdeps/generic/ifreq.h (__if_nextreq): Removed. (__ifreq): Likewise. * sysdeps/mach/hurd/ifreq.h (__if_nextreq): Removed. (__ifreq): Likewise.
2017-10-01Hide internal idna functions [BZ #18822]H.J. Lu
Hide internal idna functions to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/idna.h: New file. * inet/getnameinfo.c: Include <idna.h> instead of <libidn/idna.h>. (__idna_to_unicode_lzlz): Removed. * sysdeps/posix/getaddrinfo.c: Include <idna.h> instead of <libidn/idna.h>. (__idna_to_ascii_lz): Removed. (__idna_to_unicode_lzlz): Likewise.
2017-10-01Hide internal __gettextparse function [BZ #18822]H.J. Lu
Hide internal __gettextparse function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/plural-exp.h: New file. * intl/plural-exp.c: Include <plural-exp.h> instead of "plural-exp.h".
2017-10-01Move hidden_proto (__dl_iterate_phdr) to include/link.h [BZ #18822]H.J. Lu
__dl_iterate_phdr is hidden and should be accessed directly within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * elf/dl-iteratephdr.c (hidden_proto (__dl_iterate_phdr)): Moved to ... * include/link.h (hidden_proto (__dl_iterate_phdr)): Here.
2017-10-01Hide internal __tdestroy function [BZ #18822]H.J. Lu
Hide internal __tdestroy function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/search.h (__tdestroy): Add libc_hidden_proto. * misc/tsearch.c (__tdestroy): Add libc_hidden_def.
2017-10-01Hide internal __assert_fail_base function [BZ #18822]H.J. Lu
Hide internal __assert_fail_base function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/assert.h (__assert_fail_base): Add attribute_hidden.
2017-10-01Hide internal signal functions [BZ #18822]H.J. Lu
Hide internal signal functions to allow direct access within libc.so and libc.a without using GOT nor PLT. __GI___kill and __GI___sigaltstack are defined when syscalls.list is used to generate them. Otherwise libc_hidden_def is needed explicitly. [BZ #18822] * include/signal.h (__kill): Add libc_hidden_proto. (__sigblock): Likewise. (__sigprocmask): Likewise. (__sigaltstack): Likewise. * signal/kill.c (__kill): Add libc_hidden_def. * signal/sigblock.c (__sigblock): Likewise. * signal/sigprocmask.c (__sigprocmask): Likewise. * sysdeps/mach/hurd/kill.c (__kill): Likewise. * sysdeps/mach/hurd/sigaltstack.c (__sigaltstack): Likewise. * sysdeps/mach/hurd/sigprocmask.c (__sigprocmask): Likewise. * sysdeps/posix/sigblock.c (__sigblock): Likewise. * sysdeps/unix/sysv/linux/alpha/sigprocmask.c (__sigprocmask): Likewise. * sysdeps/unix/sysv/linux/ia64/sigprocmask.c (__sigprocmask): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/sigprocmask.c (__sigprocmask): Likewise. * sysdeps/unix/sysv/linux/sigprocmask.c (__sigprocmask): Likewise. * /sysdeps/unix/sysv/linux/sparc/sparc64/sigprocmask.c (__sigprocmask): Likewise. * sysdeps/unix/sysv/linux/x86_64/sigprocmask.c (__sigprocmask): Likewise.
2017-10-01Hide internal __strsep function [BZ #18822]H.J. Lu
Hide internal __strsep function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/string.h (__strsep): Add libc_hidden_proto. * string/strsep.c (__strsep): Add libc_hidden_def.
2017-10-01Hide internal __mremap function [BZ #18822]H.J. Lu
Hide internal __mremap function to allow direct access within libc.so and libc.a without using GOT nor PLT. __GI___mremap is defined when sysdeps/unix/syscalls.list is used to generate mremap. Otherwise libc_hidden_def is needed explicitly. [BZ #18822] * include/sys/mman.h (__mremap): Add libc_hidden_proto. * sysdeps/unix/sysv/linux/m68k/mremap.S (__mremap): Add libc_hidden_def.
2017-10-01Hide internal __malloc_check_init function [BZ #18822]H.J. Lu
Hide internal __malloc_check_init function to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/malloc.h (__malloc_check_init): Add attribute_hidden.
2017-10-01Hide internal __ioctl function [BZ #18822]H.J. Lu
Hide internal __ioctl function to allow direct access within libc.so and libc.a without using GOT nor PLT. __GI___ioctl is defined when sysdeps/unix/syscalls.list is used to generate ioctl. Otherwise libc_hidden_def is needed explicitly. [BZ #18822] * include/sys/ioctl.h (__ioctl): Add libc_hidden_proto. * misc/ioctl.c (__ioctl): Add libc_hidden_def. * sysdeps/mach/hurd/ioctl.c (__ioctl): Likewise. * sysdeps/unix/sysv/linux/aarch64/ioctl.S (__ioctl): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/ioctl.S (__ioctl): Likewise. * sysdeps/unix/sysv/linux/powerpc/ioctl.c (__ioctl): Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/ioctl.S (__ioctl): Likewise.
2017-10-01Hide internal sysinfo functions [BZ #18822]H.J. Lu
Hide internal sysinfo functions to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/sys/sysinfo.h (__get_nprocs_conf): Add libc_hidden_proto. (__get_nprocs): Likewise. (__get_phys_pages): Likewise. (__get_avphys_pages): Likewise. (__get_child_max): Add attribute_hidden. * misc/getsysstats.c (__get_nprocs_conf): Add libc_hidden_def. (__get_nprocs): Likewise. (__get_phys_pages): Likewise. (__get_avphys_pages): Likewise. * sysdeps/mach/getsysstats.c (__get_nprocs_conf): Add libc_hidden_def. (__get_nprocs): Likewise. (__get_phys_pages): Likewise. (__get_avphys_pages): Likewise. * sysdeps/unix/sysv/linux/getsysstats.c (__get_nprocs): Add libc_hidden_def. (__get_nprocs_conf): Likewise. (__get_phys_pages): Likewise. (__get_avphys_pages): Likewise.
2017-10-01Mark internal rpc functions with attribute_hidden [BZ #18822]H.J. Lu
Mark internal rpc functions with attribute_hidden to allow direct access within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/rpc/rpc.h (__rpc_thread_variables): Add attribute_hidden. (__rpc_thread_svc_cleanup): Likewise. (__rpc_thread_clnt_cleanup): Likewise. (__rpc_thread_key_cleanup): Likewise.
2017-10-01Hide __readv and __writev [BZ #18822]H.J. Lu
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.
2017-10-01Hide internal regex functions [BZ #18822]H.J. Lu
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.
2017-10-01Mark internal utmp functions with attribute_hidden [BZ #18822]H.J. Lu
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.
2017-10-01Mark internal dirent functions with attribute_hidden [BZ #18822]H.J. Lu
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.
2017-10-01Mark internal getXXXbyYYY functions with attribute_hidden [BZ #18822]H.J. Lu
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.
2017-10-01Mark internal stdio functions with attribute_hidden [BZ #18822]H.J. Lu
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.
2017-10-01Mark internal gshadow functions with attribute_hidden [BZ #18822]H.J. Lu
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.
2017-10-01Mark internal statfs functions with attribute_hidden [BZ #18822]H.J. Lu
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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