delta/glibc.git/string/Versions, branch azanella/aarch64-split-stack sourceware.org: git/glibc.git New string function explicit_bzero (from OpenBSD). 2016-12-16T21:21:54+00:00 Zack Weinberg zackw@panix.com 2016-09-15T11:29:44+00:00 ea1bd74defcf9d5291d14972e63105168ca9eb4f explicit_bzero(s, n) is the same as memset(s, 0, n), except that the compiler is not allowed to delete a call to explicit_bzero even if the memory pointed to by 's' is dead after the call. Right now, this effect is achieved externally by having explicit_bzero be a function whose semantics are unknown to the compiler, and internally, with a no-op asm statement that clobbers memory. This does mean that small explicit_bzero operations cannot be expanded inline as small memset operations can, but on the other hand, small memset operations do get deleted by the compiler. Hopefully full compiler support for explicit_bzero will happen relatively soon. There are two new tests: test-explicit_bzero.c verifies the visible semantics in the same way as the existing test-bzero.c, and tst-xbzero-opt.c verifies the not-being-optimized-out property. The latter is conceptually based on a test written by Matthew Dempsky for the OpenBSD regression suite. The crypt() implementation has an immediate use for this new feature. We avoid having to add a GLIBC_PRIVATE alias for explicit_bzero by running all of libcrypt's calls through the fortified variant, __explicit_bzero_chk, which is in the impl namespace anyway. Currently I'm not aware of anything in libc proper that needs this, but the glue is all in place if it does become necessary. The legacy DES implementation wasn't bothering to clear its buffers, so I added that, mostly for consistency's sake. * string/explicit_bzero.c: New routine. * string/test-explicit_bzero.c, string/tst-xbzero-opt.c: New tests. * string/Makefile (routines, strop-tests, tests): Add them. * string/test-memset.c: Add ifdeffage for testing explicit_bzero. * string/string.h [__USE_MISC]: Declare explicit_bzero. * debug/explicit_bzero_chk.c: New routine. * debug/Makefile (routines): Add it. * debug/tst-chk1.c: Test fortification of explicit_bzero. * string/bits/string3.h: Fortify explicit_bzero. * manual/string.texi: Document explicit_bzero. * NEWS: Mention addition of explicit_bzero. * crypt/crypt-entry.c (__crypt_r): Clear key-dependent intermediate data before returning, using explicit_bzero. * crypt/md5-crypt.c (__md5_crypt_r): Likewise. * crypt/sha256-crypt.c (__sha256_crypt_r): Likewise. * crypt/sha512-crypt.c (__sha512_crypt_r): Likewise. * include/string.h: Redirect internal uses of explicit_bzero to __explicit_bzero_chk[_internal]. * string/Versions [GLIBC_2.25]: Add explicit_bzero. * debug/Versions [GLIBC_2.25]: Add __explicit_bzero_chk. * sysdeps/arm/nacl/libc.abilist * sysdeps/unix/sysv/linux/aarch64/libc.abilist * sysdeps/unix/sysv/linux/alpha/libc.abilist * sysdeps/unix/sysv/linux/arm/libc.abilist * sysdeps/unix/sysv/linux/hppa/libc.abilist * sysdeps/unix/sysv/linux/i386/libc.abilist * sysdeps/unix/sysv/linux/ia64/libc.abilist * sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist * sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist * sysdeps/unix/sysv/linux/microblaze/libc.abilist * sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist * sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist * sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist * sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist * sysdeps/unix/sysv/linux/nios2/libc.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist * sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist * sysdeps/unix/sysv/linux/sh/libc.abilist * sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist * sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Add entries for explicit_bzero and __explicit_bzero_chk. 
explicit_bzero(s, n) is the same as memset(s, 0, n), except that the
compiler is not allowed to delete a call to explicit_bzero even if the
memory pointed to by 's' is dead after the call.  Right now, this effect
is achieved externally by having explicit_bzero be a function whose
semantics are unknown to the compiler, and internally, with a no-op
asm statement that clobbers memory.  This does mean that small
explicit_bzero operations cannot be expanded inline as small memset
operations can, but on the other hand, small memset operations do get
deleted by the compiler.  Hopefully full compiler support for
explicit_bzero will happen relatively soon.

There are two new tests: test-explicit_bzero.c verifies the
visible semantics in the same way as the existing test-bzero.c,
and tst-xbzero-opt.c verifies the not-being-optimized-out property.
The latter is conceptually based on a test written by Matthew Dempsky
for the OpenBSD regression suite.

The crypt() implementation has an immediate use for this new feature.
We avoid having to add a GLIBC_PRIVATE alias for explicit_bzero
by running all of libcrypt's calls through the fortified variant,
__explicit_bzero_chk, which is in the impl namespace anyway.  Currently
I'm not aware of anything in libc proper that needs this, but the
glue is all in place if it does become necessary.  The legacy DES
implementation wasn't bothering to clear its buffers, so I added that,
mostly for consistency's sake.

	* string/explicit_bzero.c: New routine.
	* string/test-explicit_bzero.c, string/tst-xbzero-opt.c: New tests.
	* string/Makefile (routines, strop-tests, tests): Add them.
	* string/test-memset.c: Add ifdeffage for testing explicit_bzero.
	* string/string.h [__USE_MISC]: Declare explicit_bzero.

	* debug/explicit_bzero_chk.c: New routine.
	* debug/Makefile (routines): Add it.
	* debug/tst-chk1.c: Test fortification of explicit_bzero.
	* string/bits/string3.h: Fortify explicit_bzero.

	* manual/string.texi: Document explicit_bzero.
	* NEWS: Mention addition of explicit_bzero.

	* crypt/crypt-entry.c (__crypt_r): Clear key-dependent intermediate
	data before returning, using explicit_bzero.
	* crypt/md5-crypt.c (__md5_crypt_r): Likewise.
	* crypt/sha256-crypt.c (__sha256_crypt_r): Likewise.
	* crypt/sha512-crypt.c (__sha512_crypt_r): Likewise.

	* include/string.h: Redirect internal uses of explicit_bzero
	to __explicit_bzero_chk[_internal].
	* string/Versions [GLIBC_2.25]: Add explicit_bzero.
	* debug/Versions [GLIBC_2.25]: Add __explicit_bzero_chk.
	* sysdeps/arm/nacl/libc.abilist
	* sysdeps/unix/sysv/linux/aarch64/libc.abilist
	* sysdeps/unix/sysv/linux/alpha/libc.abilist
	* sysdeps/unix/sysv/linux/arm/libc.abilist
	* sysdeps/unix/sysv/linux/hppa/libc.abilist
	* sysdeps/unix/sysv/linux/i386/libc.abilist
	* sysdeps/unix/sysv/linux/ia64/libc.abilist
	* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
	* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
	* sysdeps/unix/sysv/linux/microblaze/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
	* sysdeps/unix/sysv/linux/nios2/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
	* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
	* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
	* sysdeps/unix/sysv/linux/sh/libc.abilist
	* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
	* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist:
	Add entries for explicit_bzero and __explicit_bzero_chk.
Improve generic strcspn performance 2016-04-01T13:44:40+00:00 Wilco Dijkstra wdijkstr@arm.com 2016-03-25T19:44:26+00:00 d3496c9f4f27d3009b71be87f6108b4fed7314bd Improve strcspn performance using a much faster algorithm. It is kept simple so it works well on most targets. It is generally at least 10 times faster than the existing implementation on bench-strcspn on a few AArch64 implementations, and for some tests 100 times as fast (repeatedly calling strchr on a small string is extremely slow...). In fact the string/bits/string2.h inlines make no longer sense, as GCC already uses strlen if reject is an empty string, strchrnul is 5 times as fast as __strcspn_c1, while __strcspn_c2 and __strcspn_c3 are slower than the strcspn main loop for large strings (though reject length 2-4 could be special cased in the future to gain even more performance). Tested on x86_64, i686, and aarch64. * string/Version (libc): Add GLIBC_2.24. * string/strcspn.c (strcspn): Rewrite function. * string/bits/string2.h (strcspn): Use __builtin_strcspn. (__strcspn_c1): Remove inline function. (__strcspn_c2): Likewise. (__strcspn_c3): Likewise. * string/string-inline.c [SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c1): Add compatibility symbol. [SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c2): Likewise. [SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c3): Likewise. * sysdeps/i386/string-inlines.c: Include generic string-inlines.c. 
Improve strcspn performance using a much faster algorithm.  It is kept simple
so it works well on most targets.  It is generally at least 10 times faster
than the existing implementation on bench-strcspn on a few AArch64
implementations, and for some tests 100 times as fast (repeatedly calling
strchr on a small string is extremely slow...).

In fact the string/bits/string2.h inlines make no longer sense, as GCC
already uses strlen if reject is an empty string, strchrnul is 5 times as
fast as __strcspn_c1, while __strcspn_c2 and __strcspn_c3 are slower than
the strcspn main loop for large strings (though reject length 2-4 could be
special cased in the future to gain even more performance).

Tested on x86_64, i686, and aarch64.

	* string/Version (libc): Add GLIBC_2.24.
	* string/strcspn.c (strcspn): Rewrite function.
	* string/bits/string2.h (strcspn): Use __builtin_strcspn.
	(__strcspn_c1): Remove inline function.
	(__strcspn_c2): Likewise.
	(__strcspn_c3): Likewise.
	* string/string-inline.c
	[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c1): Add
	compatibility symbol.
	[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c2):
	Likewise.
	[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c3):
	Likewise.
	* sysdeps/i386/string-inlines.c: Include generic string-inlines.c.
Sort Versions files 2013-02-17T15:34:04+00:00 Andreas Jaeger aj@suse.de 2013-02-17T15:26:35+00:00 f238fd190bbfc57f5678ca5c5975b92bfb21e040 






* sysdeps/unix/sysv/linux/i386/sysdep.h (PTR_MANGLE): Roll value before
2007-02-01T16:14:15+00:00

Ulrich Drepper
drepper@redhat.com

2007-02-01T16:14:15+00:00

4a44ce79c6dee9a77207466142a36caa9fa54141

	returning.
	(PTR_DEMANGLE): Real definition now that it's not the same as
	PRT_MANGLE anymore.
	* sysdeps/unix/sysv/linux/x86_64/sysdep.h: Likewise.

	* string/strerror_l.c: New file.
	* string/Makefile (routines): Add strerror_l.
	* string/string.h: Declare strerror_l.
	* string/Versions: Export strerror_l for GLIBC_2.6.

	* nscd/connections.c (nscd_run): Don't define MAXKEYLEN here.





	returning.
	(PTR_DEMANGLE): Real definition now that it's not the same as
	PRT_MANGLE anymore.
	* sysdeps/unix/sysv/linux/x86_64/sysdep.h: Likewise.

	* string/strerror_l.c: New file.
	* string/Makefile (routines): Add strerror_l.
	* string/string.h: Declare strerror_l.
	* string/Versions: Export strerror_l for GLIBC_2.6.

	* nscd/connections.c (nscd_run): Don't define MAXKEYLEN here.







Update.
2004-03-22T19:54:06+00:00

Ulrich Drepper
drepper@redhat.com

2004-03-22T19:54:06+00:00

61645263d4b3c72c9a33659a0fcabe1dd2814a98

2004-03-22  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/unix/sysv/linux/sparc/sparc32/getpagesize.c
	(__getpagesize): Avoid warning about writing into read-only memory.

	* string/Makefile (routines): Add xpg-strerror.
	* string/string.h (strerror_r): If __USE_XOPEN2K but not __USE_GNU,
	redirect strerror_r to __xpg_strerror_r.
	* string/Versions (libc): Add __xpg_strerror_r@@GLIBC_2.3.4.
	* sysdeps/generic/xpg-strerror.c: New file.
	* sysdeps/mach/xpg-strerror.c: New file.





2004-03-22  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/unix/sysv/linux/sparc/sparc32/getpagesize.c
	(__getpagesize): Avoid warning about writing into read-only memory.

	* string/Makefile (routines): Add xpg-strerror.
	* string/string.h (strerror_r): If __USE_XOPEN2K but not __USE_GNU,
	redirect strerror_r to __xpg_strerror_r.
	* string/Versions (libc): Add __xpg_strerror_r@@GLIBC_2.3.4.
	* sysdeps/generic/xpg-strerror.c: New file.
	* sysdeps/mach/xpg-strerror.c: New file.







Update.
2001-10-07T20:26:31+00:00

Ulrich Drepper
drepper@redhat.com

2001-10-07T20:26:31+00:00

b61345a1add0789a12fe341563374d64b5134771

2001-10-04  Ben Collins  <bcollins@debian.org>

	* sysdeps/generic/inttypes.h: Fix typo (define, not defined) in
	decleration of __need_wchar_t.

2001-10-03  Jakub Jelinek  <jakub@redhat.com>

	* string/bits/string2.h (__strsep_g): Add prototype.
	(__strsep): Use it.
	* string/Versions (__strsep): Remove.
	* sysdeps/generic/strsep.c (__strsep_g): Add alias to __strsep.

2001-10-07  Ulrich Drepper  <drepper@redhat.com>

	* manua/llio.texi: Clarify file references added by mmap.
	Patch by Marcus Brinkmann <Marcus.Brinkmann@ruhr-uni-bochum.de>.





2001-10-04  Ben Collins  <bcollins@debian.org>

	* sysdeps/generic/inttypes.h: Fix typo (define, not defined) in
	decleration of __need_wchar_t.

2001-10-03  Jakub Jelinek  <jakub@redhat.com>

	* string/bits/string2.h (__strsep_g): Add prototype.
	(__strsep): Use it.
	* string/Versions (__strsep): Remove.
	* sysdeps/generic/strsep.c (__strsep_g): Add alias to __strsep.

2001-10-07  Ulrich Drepper  <drepper@redhat.com>

	* manua/llio.texi: Clarify file references added by mmap.
	Patch by Marcus Brinkmann <Marcus.Brinkmann@ruhr-uni-bochum.de>.







Update.
2001-09-25T03:04:41+00:00

Ulrich Drepper
drepper@redhat.com

2001-09-25T03:04:41+00:00

61423e13e519c41c49adcdd8d1259a8213a5fded

	* sysdeps/unix/sysv/linux/ulimit.c (__ulimit): Handle overflow in
	UL_SETFSIZE computations better.

	* string/Versions: Export __strsep for GLIBC_2.2.5.
	* string/bits/string2.h: Define all __STRING_INLINE functions if
	_FORCE_INLINES is defined.
	Use int instead of char of parameter types.
	(__strsep): Don't use __strsep_g.  Don't define it.
	(__strsep_1c, __strsep_2c, __strsep_3c): Optimize.
	* sysdeps/i386/i486/string.h (__strcpy_a_small): Renamed from
	__strcpy_small.
	(__stpcpy_a_small): Renamed from __stpcpy_small.
	(__strcspn_c1): Don't define if _FORCE_INLINES.
	(__strspn_c1): Likewise.

2001-09-22  Ben Collins  <bcollins@debian.org>

	* sysdeps/sparc/bits/sigaction.h: Define SA_RESTART and friends when
	_UNIX98_SOURCE is defined too.  Matches generic/bits/sigaction.h.
	* sysdeps/ia64/bits/sigaction.h: Likewise.
	* sysdeps/s390/s390-64/bits/sigaction.h: Likewise.

2001-09-24  Andrew Haley  <aph@cambridge.redhat.com>

	* sysdeps/unix/sysv/linux/sh/Makefile (sysdep_headers): Add sys/io.h.

2001-09-24  Jakub Jelinek  <jakub@redhat.com>

	* elf/dl-open.c (dl_open_worker): Update l_scope_max.

2001-09-24  Ulrich Drepper  <drepper@redhat.com>





	* sysdeps/unix/sysv/linux/ulimit.c (__ulimit): Handle overflow in
	UL_SETFSIZE computations better.

	* string/Versions: Export __strsep for GLIBC_2.2.5.
	* string/bits/string2.h: Define all __STRING_INLINE functions if
	_FORCE_INLINES is defined.
	Use int instead of char of parameter types.
	(__strsep): Don't use __strsep_g.  Don't define it.
	(__strsep_1c, __strsep_2c, __strsep_3c): Optimize.
	* sysdeps/i386/i486/string.h (__strcpy_a_small): Renamed from
	__strcpy_small.
	(__stpcpy_a_small): Renamed from __stpcpy_small.
	(__strcspn_c1): Don't define if _FORCE_INLINES.
	(__strspn_c1): Likewise.

2001-09-22  Ben Collins  <bcollins@debian.org>

	* sysdeps/sparc/bits/sigaction.h: Define SA_RESTART and friends when
	_UNIX98_SOURCE is defined too.  Matches generic/bits/sigaction.h.
	* sysdeps/ia64/bits/sigaction.h: Likewise.
	* sysdeps/s390/s390-64/bits/sigaction.h: Likewise.

2001-09-24  Andrew Haley  <aph@cambridge.redhat.com>

	* sysdeps/unix/sysv/linux/sh/Makefile (sysdep_headers): Add sys/io.h.

2001-09-24  Jakub Jelinek  <jakub@redhat.com>

	* elf/dl-open.c (dl_open_worker): Update l_scope_max.

2001-09-24  Ulrich Drepper  <drepper@redhat.com>







Update.
2000-01-24T02:54:28+00:00

Ulrich Drepper
drepper@redhat.com

2000-01-24T02:54:28+00:00

b8de3ffc847a12930a90b31c91ccb1721db883bd

2000-01-23  Ulrich Drepper  <drepper@cygnus.com>

	* string/Versions: Export __strndup.





2000-01-23  Ulrich Drepper  <drepper@cygnus.com>

	* string/Versions: Export __strndup.







Export memrchr.
1999-10-04T06:07:05+00:00

Ulrich Drepper
drepper@redhat.com

1999-10-04T06:07:05+00:00

1d781d86c3c36d1dd363df62009a31ca528270f8












Update.
1999-05-17T17:25:32+00:00

Ulrich Drepper
drepper@redhat.com

1999-05-17T17:25:32+00:00

9bbd7837b698c0bba325de00cd396c1e970ab281

1999-05-17  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/i386/i486/Versions: New file with inline functions from
	sysdeps/i386/i486/bits/string.h for now.

	* sysdeps/i386/Versions: Add inline functions from
	sysdeps/i386/bits/string.h.

	* string/Versions: Add inline functions from <bits/string2.h>.

	* string/Makefile (routines): Add string-inlines.
	* string/string-inlines.c: New file, used for implementation of
	extern inline functions.

	* sysdeps/i386/i486/bits/string.h: Use _FORCE_INLINES to generate
	non inlined versions of functions.
	* string/bits/string2.h: Likewise.
	* sysdeps/i386/bits/string.h: Likewise.

1999-05-17  Ulrich Drepper  <drepper@cygnus.com>

	* inet/arpa/tftp.h: Add second packed attribute.





1999-05-17  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/i386/i486/Versions: New file with inline functions from
	sysdeps/i386/i486/bits/string.h for now.

	* sysdeps/i386/Versions: Add inline functions from
	sysdeps/i386/bits/string.h.

	* string/Versions: Add inline functions from <bits/string2.h>.

	* string/Makefile (routines): Add string-inlines.
	* string/string-inlines.c: New file, used for implementation of
	extern inline functions.

	* sysdeps/i386/i486/bits/string.h: Use _FORCE_INLINES to generate
	non inlined versions of functions.
	* string/bits/string2.h: Likewise.
	* sysdeps/i386/bits/string.h: Likewise.

1999-05-17  Ulrich Drepper  <drepper@cygnus.com>

	* inet/arpa/tftp.h: Add second packed attribute.