Commit Graph

28043 Commits

Author SHA1 Message Date
Torvald Riegel
63668b7084 pthread_once: Clean up constants.
[BZ #15215] This just gives a name to the integer constants being used.
2014-10-20 18:22:30 +02:00
Joseph Myers
42b7f5d485 Move readv and writev definitions to syscalls.list (bug 14138).
Continuing the move of syscall definitions to syscalls.list, where the
removal of support for old kernel versions has made this possible,
this patch moves definitions of readv and writev.

The relevant syscalls.list entries were already in
sysdeps/unix/syscalls.list, but to match the C files they needed to
have the names __libc_readv and __libc_writev added.  In fact, I don't
see anything making use of those names - as far as I can tell, these
functions could just be defined as __readv and __writev with aliases
readv and writev.  But cleaning up unnecessary aliases for functions
should be a separate matter from cleaning up unnecessary C syscall
wrappers.

Tested for x86_64.

	[BZ #14138]
	* sysdeps/unix/syscalls.list (readv): Use __libc_readv as strong
	name.
	(writev): Use __libc_writev as strong name.
	* sysdeps/unix/sysv/linux/readv.c: Remove file.
	* sysdeps/unix/sysv/linux/writev.c: Likewise.
2014-10-20 15:49:08 +00:00
Roland McGrath
114c4e0954 Remove obsolete TLS_DEFINE_INIT_TP fallback. 2014-10-17 15:40:36 -07:00
Roland McGrath
674b89786e NPTL: Clean up THREAD_SYSINFO macros. 2014-10-17 15:03:00 -07:00
Roland McGrath
184ee94010 NPTL: Conditionalize direct futex syscall uses. 2014-10-17 14:30:16 -07:00
Roland McGrath
327ae25707 NPTL: Conditionalize more uses of SIGCANCEL and SIGSETXID. 2014-10-17 13:40:46 -07:00
Roland McGrath
b0643088bc Fix NPTL build error when missing __NR_set_robust_list. 2014-10-17 11:30:15 -07:00
Siddhesh Poyarekar
33cc770b98 Fix up incorrect formatting in last commit 2014-10-17 15:52:46 +05:30
Leonhard Holz
0742aef6e5 strcoll: improve performance by removing the cache (#15884)
this is a path that should solve bug 15884. It complains about the performance
of strcoll(). It was found out that the runtime of strcoll() is actually bound
to strlen which is needed for calculating the size of a cache that was
installed to improve the comparison performance.

The idea for this patch was that the cache is only useful in rare cases
(strings of same length and same first-level-chars) and that it would be
better to avoid memory allocation at all. To prove this I wrote a performance
test bench-strcoll.c with test data in benchtests-strcoll.tar.gz. Also
modifications in benchtests/Makefile and localedata/Makefile are necessary to
make it work.

After removing the cache the strcoll method showed the predicted behavior
(getting slightly faster) in all but the test case for hindi word sorting.
This was due the hindi text having much more equal words than the other ones.
For equal strings the performance was worse since all comparison levels were
run through and from the second level on the cache improved the comparison
performance of the original version.

Therefore I added a bytewise test via strcmp iff the first level comparison
found that both strings did match because in this case it is very likely that
equal strings are compared. This solved the problem with the hindi test case
and improved the performance of the others.

Performance comparison:

glibc files     -33.77%
vi_VN.UTF-8     -34.12%
en_US.UTF-8     -42.42%
ar_SA.UTF-8     -27.49%
zh_CN.UTF-8     +07.90%
cs_CZ.UTF-8     -29.67%
en_GB.UTF-8     -28.50%
da_DK.UTF-8     -36.57%
pl_PL.UTF-8     -39.31%
fr_FR.UTF-8     -28.57%
pt_PT.UTF-8     -22.82%
el_GR.UTF-8     -26.77%
ru_RU.UTF-8     -35.81%
iw_IL.UTF-8     -35.34%
es_ES.UTF-8     -34.46%
hi_IN.UTF-8     -00.38%
sv_SE.UTF-8     -36.99%
hu_HU.UTF-8     -16.35%
tr_TR.UTF-8     -27.80%
is_IS.UTF-8     -33.24%
it_IT.UTF-8     -24.39%
sr_RS.UTF-8     -37.55%
ja_JP.UTF-8     +02.84%
2014-10-17 15:47:23 +05:30
Roland McGrath
ee54ce44cb Remove sysdeps/arm/soft-fp directory. 2014-10-16 09:54:45 -07:00
Joseph Myers
a75d3b0288 conformtest: clean up POSIX expections for sys/utsname.h, sys/wait.h.
Continuing the series of patches to clean up conformtest expectations
for "POSIX" (1995/6) based on review of the expectations against the
standard, this patch cleans up expectations for sys/utsname.h and
sys/wait.h.  Tested x86_64; a new XFAIL for sys/wait.h is added.

	* conform/data/sys/utsname.h-data (*_t): Allow.
	* conform/data/sys/wait.h-data [POSIX] (uid_t): Do not define.
	[POSIX] (WEXITED): Do not expect constant.
	[POSIX] (WSTOPPED): Likewise.
	[POSIX] (WNOHANG): Likewise.
	[POSIX] (WNOWAIT): Likewise.
	[POSIX] (siginfo_t): Do not expect type or elements.
	[POSIX] (pid_t): Do not expect type.
	[POSIX] (signal.h): Do not allow header.
	[POSIX] (sys/resource.h): Likewise.
	[POSIX] (si_*): Do not allow pattern.
	[POSIX] (W*): Likewise.
	[POSIX] (P_*): Likewise.
	[POSIX] (BUS_*): Likewise.
	[POSIX] (CLD_*): Likewise.
	[POSIX] (FPE_*): Likewise.
	[POSIX] (ILL_*): Likewise.
	[POSIX] (POLL_*): Likewise.
	[POSIX] (SEGV_*): Likewise.
	[POSIX] (SI_*): Likewise.
	[POSIX] (TRAP_*): Likewise.
	* conform/Makefile (test-xfail-POSIX/sys/wait.h/conform): New
	variable.
2014-10-14 17:00:11 +00:00
Siddhesh Poyarekar
fda389c8f0 Fix infinite loop in check_pf (BZ #12926)
The recvmsg could return 0 under some conditions and cause the
make_request function to be stuck in an infinite loop.

Thank you Jim King <jim.king@simplivity.com> for posting Paul's patch
on the list.
2014-10-14 21:05:33 +05:30
Joseph Myers
fcb32af153 Remove CANCEL-FCT-WAIVE and CANCEL-FILE-WAIVE.
As far as I can tell, CANCEL-FCT-WAIVE and CANCEL-FILE-WAIVE are old
notes from the addition of cancellation support to glibc and are not
currently used by any glibc testcases or otherwise in the build
process, and it does not seem useful to me to keep them around.  This
patch removes them.

Tested for x86_64.

	* CANCEL-FCT-WAIVE: Remove file.
	* CANCEL-FILE-WAIVE: Likewise.
2014-10-10 17:05:58 +00:00
Joseph Myers
6bc6bd3b10 Don't use INTVARDEF/INTUSE with __libc_enable_secure (bug 14132).
Continuing the removal of the obsolete INTDEF / INTVARDEF / INTUSE
mechanism, this patch replaces its use for __libc_enable_secure with
the use of rtld_hidden_data_def and rtld_hidden_proto.

Tested for x86_64 that installed stripped shared libraries are
unchanged by the patch.

	[BZ #14132]
	* elf/dl-sysdep.c (__libc_enable_secure): Use rtld_hidden_data_def
	instead of INTVARDEF.
	(_dl_sysdep_start): Do not use INTUSE with __libc_enable_secure.
	* sysdeps/mach/hurd/dl-sysdep.c (__libc_enable_secure): Use
	rtld_hidden_data_def instead of INTVARDEF.
	(_dl_sysdep_start): Do not use INTUSE with __libc_enable_secure.
	* elf/dl-deps.c (expand_dst): Likewise.
	* elf/dl-load.c (_dl_dst_count): Likewise.
	(_dl_dst_substitute): Likewise.
	(decompose_rpath): Likewise.
	(_dl_init_paths): Likewise.
	(open_path): Likewise.
	(_dl_map_object): Likewise.
	* elf/rtld.c (dl_main): Likewise.
	(process_dl_audit): Likewise.
	(process_envvars): Likewise.
	* include/unistd.h [IS_IN_rtld] (__libc_enable_secure_internal):
	Remove declaration.
	(__libc_enable_secure): Use rtld_hidden_proto.
2014-10-10 11:13:11 +00:00
Kostya Serebryany
b8c80a7e0d remove nested functions from elf/dl-load.c 2014-10-09 11:15:24 -07:00
Joseph Myers
5c0508a318 soft-fp: Use parentheses around macro arguments.
This patch cleans up the soft-fp code to use parentheses around macro
arguments (where possible; many macro arguments are identifiers used
with ## rather than arbitrary expressions, so cannot be put in
parentheses).  (I'm not aware of any bugs caused by the lack of
parentheses, but this is generally good practice.  The patch is not
exhaustive regarding internal macros where the arguments always come
directly from the mantissa of a floating-point number, although
probably those should be cleaned up in this regard as well.)

Tested for powerpc-nofpu that the installed shared libraries are
unchanged by this patch.

	* soft-fp/double.h [_FP_W_TYPE_SIZE < 64] (FP_UNPACK_RAW_D): Use
	parentheses around macro arguments.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_RAW_DP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_RAW_D): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_RAW_DP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_D): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_DP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_SEMIRAW_D): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_SEMIRAW_DP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_D): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_DP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_SEMIRAW_D): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_SEMIRAW_DP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (_FP_SQRT_MEAT_D): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_CMP_D): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_CMP_EQ_D): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_CMP_UNORD_D): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_TO_INT_D): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_FROM_INT_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_RAW_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_RAW_DP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_RAW_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_RAW_DP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_DP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_SEMIRAW_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_SEMIRAW_DP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_DP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_SEMIRAW_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_SEMIRAW_DP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (_FP_SQRT_MEAT_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_CMP_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_CMP_EQ_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_CMP_UNORD_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_TO_INT_D): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_FROM_INT_D): Likewise.
	* soft-fp/extended.h [_FP_W_TYPE_SIZE < 64] (FP_UNPACK_E):
	Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_EP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_SEMIRAW_E): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_SEMIRAW_EP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_E): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_EP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_SEMIRAW_E): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_SEMIRAW_EP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (_FP_SQRT_MEAT_E): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_CMP_E): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_CMP_EQ_E): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_CMP_UNORD_E): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_TO_INT_E): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_FROM_INT_E): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_E): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_EP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_SEMIRAW_E): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_SEMIRAW_EP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_E): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_EP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_SEMIRAW_E): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_SEMIRAW_EP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (_FP_SQRT_MEAT_E): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_CMP_E): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_CMP_EQ_E): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_CMP_UNORD_E): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_TO_INT_E): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_FROM_INT_E): Likewise.
	* soft-fp/op-1.h (_FP_FRAC_SRST_1): Likewise.
	(_FP_FRAC_SRS_1): Likewise.
	(_FP_FRAC_CLZ_1): Likewise.
	(_FP_MUL_MEAT_1_imm): Likewise.
	(_FP_MUL_MEAT_1_wide): Likewise.
	(_FP_MUL_MEAT_1_hard): Likewise.
	(_FP_SQRT_MEAT_1): Likewise.
	(_FP_FRAC_ASSEMBLE_1): Likewise.
	(_FP_FRAC_DISASSEMBLE_1): Likewise.
	* soft-fp/op-2.h (_FP_FRAC_CLZ_2): Likewise.
	(__FP_CLZ_2): Likewise.
	(_FP_MUL_MEAT_2_wide): Likewise.
	(_FP_MUL_MEAT_2_wide_3mul): Likewise.
	(_FP_MUL_MEAT_2_gmp): Likewise.
	(_FP_MUL_MEAT_2_120_240_double): Likewise.
	(_FP_SQRT_MEAT_2): Likewise.
	(_FP_FRAC_ASSEMBLE_2): Likewise.
	(_FP_FRAC_DISASSEMBLE_2): Likewise.
	* soft-fp/op-4.h (_FP_FRAC_SRS_4): Likewise.
	(_FP_FRAC_CLZ_4): Likewise.
	(_FP_MUL_MEAT_4_wide): Likewise.
	(_FP_MUL_MEAT_4_gmp): Likewise.
	(_FP_SQRT_MEAT_4): Likewise.
	(_FP_FRAC_ASSEMBLE_4): Likewise.
	(_FP_FRAC_DISASSEMBLE_4): Likewise.
	* soft-fp/op-common.h (_FP_CMP): Likewise.
	(_FP_CMP_EQ): Likewise.
	(_FP_CMP_UNORD): Likewise.
	(_FP_TO_INT): Likewise.
	(_FP_FROM_INT): Likewise.
	[!__FP_CLZ] (__FP_CLZ): Likewise.
	(_FP_DIV_HELP_imm): Likewise.
	* soft-fp/quad.h [_FP_W_TYPE_SIZE < 64] (FP_UNPACK_RAW_Q):
	Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_RAW_QP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_RAW_Q): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_RAW_QP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_Q): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_QP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_SEMIRAW_Q): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_UNPACK_SEMIRAW_QP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_Q): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_QP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_SEMIRAW_Q): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_PACK_SEMIRAW_QP): Likewise.
	[_FP_W_TYPE_SIZE < 64] (_FP_SQRT_MEAT_Q): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_CMP_Q): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_CMP_EQ_Q): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_CMP_UNORD_Q): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_TO_INT_Q): Likewise.
	[_FP_W_TYPE_SIZE < 64] (FP_FROM_INT_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_RAW_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_RAW_QP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_RAW_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_RAW_QP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_QP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_SEMIRAW_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_UNPACK_SEMIRAW_QP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_QP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_SEMIRAW_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_PACK_SEMIRAW_QP): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (_FP_SQRT_MEAT_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_CMP_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_CMP_EQ_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_CMP_UNORD_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_TO_INT_Q): Likewise.
	[_FP_W_TYPE_SIZE >= 64] (FP_FROM_INT_Q): Likewise.
	* soft-fp/single.h (FP_UNPACK_RAW_S): Likewise.
	(FP_UNPACK_RAW_SP): Likewise.
	(FP_PACK_RAW_S): Likewise.
	(FP_PACK_RAW_SP): Likewise.
	(FP_UNPACK_S): Likewise.
	(FP_UNPACK_SP): Likewise.
	(FP_UNPACK_SEMIRAW_S): Likewise.
	(FP_UNPACK_SEMIRAW_SP): Likewise.
	(FP_PACK_S): Likewise.
	(FP_PACK_SP): Likewise.
	(FP_PACK_SEMIRAW_S): Likewise.
	(FP_PACK_SEMIRAW_SP): Likewise.
	(_FP_SQRT_MEAT_S): Likewise.
	(FP_CMP_S): Likewise.
	(FP_CMP_EQ_S): Likewise.
	(FP_CMP_UNORD_S): Likewise.
	(FP_TO_INT_S): Likewise.
	(FP_FROM_INT_S): Likewise.
2014-10-09 17:05:26 +00:00
Joseph Myers
a736ec370a soft-fp: Support rsigned == 2 in _FP_TO_INT.
Continuing the addition of soft-fp features in the Linux kernel
version, this patch adds _FP_TO_INT support for rsigned == 2 (reduce
overflowing results modulo 2^rsize to fit in the destination, used for
alpha emulation).

The kernel version is buggy; it can left shift by a negative amount
when right shifting is required in an overflow case (the kernel
version also has other bugs fixed long ago in glibc; at least,
spurious exceptions converting to the most negative integer).  This
version avoids that by handling overflow (other than to 0) for rsigned
== 2 along with the normal non-overflow case, which already properly
determines the direction in which to shift.

Tested for powerpc-nofpu.  Some functions get slightly bigger and some
get slightly smaller, no doubt as a result of the change to where in
the macro "inexact" is raised, but I don't think those changes are
significant.  Also tested for powerpc-nofpu with the relevant __fix*
functions changed to use rsigned == 2 (which is after all just as
valid as rsigned == 1 in IEEE terms), including verifying the results
and exceptions for various cases of conversions.

With these seven patches, the one remaining feature to add for the
soft-fp code to have all the features of the kernel version is
_FP_TO_INT_ROUND.

	* soft-fp/op-common.h (_FP_TO_INT): Handle rsigned == 2.
2014-10-09 15:00:37 +00:00
Joseph Myers
ff12c11f45 soft-fp: Support more precise "invalid" exceptions.
As previously discussed
<https://sourceware.org/ml/libc-alpha/2013-10/msg00345.html>, it would
be desirable to be able to use the same version of the soft-fp code in
the Linux kernel as well as in glibc and libgcc (instead of an old
version in the kernel that's missing ten years of bug fixes,
performance improvements and new features), and to that end it is
useful to add to glibc's copy features in the kernel's copy, even when
they are not directly useful in glibc.

To that end, this patch adds one of those features: support for more
precise "invalid" exceptions describing the particular kind of invalid
operation.  These are relevant for powerpc emulation, and are also as
described in IEEE 754-2008 as sub-exceptions.

The set of sub-exceptions here is the union of those supported on
powerpc and those from IEEE 754-2008 (the former adds a distinction
between 0/0 and Inf/Inf; the latter adds a distinction between Inf*0
from multiplication and the same from fma).  This includes
sub-exceptions for sqrt, conversions to integer and comparisons that
are not supported in the kernel; I see no obvious reason for these
being missing from the kernel support, given that they are supported
on powerpc so accurate powerpc emulation should generate them.

Tested for powerpc-nofpu that the disassembly of installed shared
libraries is unchanged by this patch.

	* soft-fp/soft-fp.h (FP_EX_INVALID_SNAN): New macro.
	(FP_EX_INVALID_IMZ): Likewise.
	(FP_EX_INVALID_IMZ_FMA): Likewise.
	(FP_EX_INVALID_ISI): Likewise.
	(FP_EX_INVALID_ZDZ): Likewise.
	(FP_EX_INVALID_IDI): Likewise.
	(FP_EX_INVALID_SQRT): Likewise.
	(FP_EX_INVALID_CVI): Likewise.
	(FP_EX_INVALID_VC): Likewise.
	* soft-fp/op-common.h (_FP_UNPACK_CANONICAL): Specify more precise
	"invalid" exceptions.
	(_FP_CHECK_SIGNAN_SEMIRAW): Likewise.
	(_FP_ADD_INTERNAL): Likewise.
	(_FP_MUL): Likewise.
	(_FP_FMA): Likewise.
	(_FP_DIV): Likewise.
	(_FP_CMP_CHECK_NAN): Likewise.
	(_FP_SQRT): Likewise.
	(_FP_TO_INT): Likewise.
	(FP_EXTEND): Likewise.
2014-10-09 14:59:23 +00:00
Allan McRae
b6dcfe8c24 Update French translation 2014-10-09 22:11:30 +10:00
Joseph Myers
cb8312455b Don't use INTDEF/INTUSE with __cxa_atexit (bug 14132).
This patch removes use of the obsolete INTDEF/INTUSE mechanism for
__cxa_atexit, replacing it with libc_hidden_def/libc_hidden_proto.

Tested for x86_64 that installed stripped shared libraries are
unchanged by the patch.

	[BZ #14132]
	* stdlib/cxa_atexit.c (__cxa_atexit): Use libc_hidden_def instead
	of INTDEF.
	* include/stdlib.h (__cxa_atexit_internal): Remove declaration.
	(__cxa_atexit): Use libc_hidden_proto.
	[!NOT_IN_libc] (__cxa_atexit): Remove macro definition.
2014-10-09 11:22:33 +00:00
Joseph Myers
5deeb19014 Remove stray *_internal aliases (bug 14132).
This patch removes some stray (unused) *_internal aliases, and
function prototypes with no corresponding definitions at all, at least
some of which were missed in previous INTDEF / INTUSE removal.

Not removed in this patch: __canonicalize_directory_name_internal,
noticed in the course of preparing this patch, isn't an alias, but an
actual function in sysdeps/mach/hurd/getcwd.c - apparently unused,
however.

Tested for x86_64 that installed stripped shared libraries are
unchanged by this patch.

	[BZ #14132]
	* include/wctype.h [!_ISOMAC] (__iswalpha_l_internal): Remove
	declaration.
	[!_ISOMAC] (__iswdigit_l_internal): Likewise.
	[!_ISOMAC] (__iswspace_l_internal): Likewise.
	[!_ISOMAC] (__iswxdigit_l_internal): Likewise.
	[!_ISOMAC] (__iswctype_internal): Likewise.
	* stdio-common/siglist.c (_sys_siglist_internal): Remove alias.
	* sysdeps/unix/syscalls.list (chown): Remove __chown_internal
	alias.
	(fcntl): Remove __fcntl_internal alias.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (connect): Remove
	__connect_internal alias.
	* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list (connect):
	Likewise.
2014-10-09 01:11:14 +00:00
Joseph Myers
454ac701e3 soft-fp: Add FP_DENORM_ZERO.
Continuing the addition of soft-fp features used in the Linux kernel,
this patch adds soft-fp support for FP_DENORM_ZERO (flushing input
subnormal operands to zero of the same sign).

There are some differences from the kernel version.  In the kernel,
the "inexact" exception is set when flushing to zero.  This does not
appear to match the documented semantics for either of the
architectures (alpha and sh) for which the kernel uses FP_DENORM_ZERO,
so this patch does not set "inexact" in this case.  More operations
now use raw or semi-raw unpacking for optimization than did in the
ten-year-old soft-fp version in the kernel, so checks of
FP_DENORM_ZERO are inserted in those operations.  They are also
inserted for comparisons (which already used raw unpacking in the old
version) as I believe that's the correct thing to do when input
subnormals are flushed to zero.  They are *not* inserted for _FP_NEG.
(If any processors do flush input subnormals to zero for negation, or
otherwise vary from the rules implemented when FP_DENORM_ZERO is set,
further macros for sfp-machine.h to control this may need to be
added.)

Although the addition for comparisons will cause FP_EX_DENORM to be
set in this case, it still won't be set for comparisons involving
subnormals when not flushed to zero.  It's quite possible that
accurate emulation of processors that have such an exception for
subnormal operands will require further changes relating to when
FP_EX_DENORM is set (in general, the support for things defined by
IEEE should be considered more reliable and mature than the support
for things outside the scope of IEEE floating point).

Although some processors also have a mode for abrupt underflow -
producing zeroes instead of output subnormals - there is no such mode
in the kernel's soft-fp, so no such mode is added to glibc's soft-fp
(although it could be if someone wanted to emulate such processor
support).

Tested for powerpc-nofpu that the disassembly of installed shared
libraries is unchanged by this patch.

	* soft-fp/soft-fp.h (FP_DENORM_ZERO): New macro.
	* soft-fp/op-common.h (_FP_UNPACK_CANONICAL): Check
	FP_DENORM_ZERO.
	(_FP_CHECK_FLUSH_ZERO): New macro.
	(_FP_ADD_INTERNAL): Call _FP_CHECK_FLUSH_ZERO.
	(_FP_CMP): Likewise.
	(_FP_CMP_EQ): Likewise.
	(_FP_TO_INT): Do not set inexact for subnormal arguments if
	FP_DENORM_ZERO.
	(FP_EXTEND): Call _FP_CHECK_FLUSH_ZERO.
	(FP_TRUNC): Likewise.
2014-10-09 01:09:22 +00:00
Joseph Myers
0022e688d0 soft-fp: Fix _FP_TO_INT latent bug in overflow handling.
This patch fixes a latent bug in _FP_TO_INT regarding handling of
arguments with maximum exponent (infinities and NaNs).  If the maximum
exponent is below that calculated as an overflow threshold, such
values would incorrectly be treated as normal values for the purposes
of the conversion.  This could not occur for any of the conversions
actually occurring in glibc, libgcc or the Linux kernel (the maximum
exponent for float is, just, big enough to ensure overflow for
unsigned __int128), but would apply if soft-fp were used for IEEE
binary16.  Appropriate checks are inserted to ensure that the maximum
exponent is always treated as an overflowing exponent, and never as a
normal one.

Tested for powerpc-nofpu that the disassembly of installed shared
libraries is unchanged by this patch.

	* soft-fp/op-common.h (_FP_TO_INT): Ensure maximum exponent is
	treated as invalid conversion, not as normal exponent.
2014-10-09 01:07:10 +00:00
Joseph Myers
73e28d9c88 soft-fp: Refactor exception handling for comparisons.
This patch refactors how soft-fp comparisons handle setting exceptions
for NaN operands, so that exceptions are set through the FP_CMP macros
rather than directly in the C files calling them.

The _FP_CMP* and FP_CMP* macros gain an extra argument to specify when
exceptions should be set, 0 for no exception setting (I'm not sure
this is actually needed - at least it's not needed for IEEE operations
in glibc / libgcc, but might be relevant in some cases for kernel
use), 1 for exceptions only for signaling NaNs and 2 for exceptions
for all NaNs.  This argument is handled through _FP_CMP_CHECK_NAN,
newly called by the _FP_CMP* macros when a NaN is encountered.  Calls
to these macros are updated, which eliminates all the existing
checking and exception setting in soft-fp *.c files in glibc.

Tested for powerpc-nofpu.  (The __unord* functions have no code
changes; the __eq* / __ge* / __le* functions get slightly larger, but
I don't think that's significant.)

	* soft-fp/op-common.h (_FP_CMP_CHECK_NAN): New macro.
	(_FP_CMP): Add extra argument EX.  Call _FP_CMP_CHECK_NAN.
	(_FP_CMP_EQ): Likewise.
	(_FP_CMP_UNORD): Likewise.
	* soft-fp/double.h (FP_CMP_D): Add extra argument EX.
	(FP_CMP_EQ_D): Likewise.
	(FP_CMP_UNORD_D): Likewise.
	* soft-fp/extended.h (FP_CMP_E): Likewise.
	(FP_CMP_EQ_E): Likewise.
	(FP_CMP_UNORD_E): Likewise.
	* soft-fp/quad.h (FP_CMP_Q): Likewise.
	(FP_CMP_EQ_Q): Likewise.
	(FP_CMP_UNORD_Q): Likewise.
	* soft-fp/single.h (FP_CMP_S): Likewise.
	(FP_CMP_EQ_S): Likewise.
	(FP_CMP_UNORD_S): Likewise.
	* soft-fp/eqdf2.c (__eqdf2): Update call to FP_CMP_EQ_D.
	* soft-fp/eqsf2.c (__eqsf2): Update call to FP_CMP_EQ_S.
	* soft-fp/eqtf2.c (__eqtf2): Update call to FP_CMP_EQ_Q.
	* soft-fp/gedf2.c (__gedf2): Update call to FP_CMP_D.
	* soft-fp/gesf2.c (__gesf2): Update call to FP_CMP_S.
	* soft-fp/getf2.c (__getf2): Update call to FP_CMP_Q.
	* soft-fp/ledf2.c (__ledf2): Update call to FP_CMP_D.
	* soft-fp/lesf2.c (__lesf2): Update call to FP_CMP_S.
	* soft-fp/letf2.c (__letf2): Update call to FP_CMP_Q.
	* soft-fp/unorddf2.c (__unorddf2): Update call to FP_CMP_UNORD_D.
	* soft-fp/unordsf2.c (__unordsf2): Update call to FP_CMP_UNORD_S.
	* soft-fp/unordtf2.c (__unordtf2): Update call to FP_CMP_UNORD_Q.
	* sysdeps/alpha/soft-fp/ots_cmpe.c (internal_compare): Update call
	to FP_CMP_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_cmp.c (_Q_cmp): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_cmpe.c (_Q_cmpe): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_feq.c (_Q_feq): Update call to
	FP_CMP_EQ_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_fge.c (_Q_fge): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_fgt.c (_Q_fgt): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_fle.c (_Q_fle): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_flt.c (_Q_flt): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_fne.c (_Q_fne): Update call to
	FP_CMP_EQ_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_cmp.c (_Qp_cmp): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_cmpe.c (_Qp_cmpe): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_feq.c (_Qp_feq): Update call to
	FP_CMP_EQ_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_fge.c (_Qp_fge): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_fgt.c (_Qp_fgt): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_fle.c (_Qp_fle): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_flt.c (_Qp_flt): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_fne.c (_Qp_fne): Update call to
	FP_CMP_EQ_Q.
2014-10-09 01:03:56 +00:00
Joseph Myers
43059f42db soft-fp: Make extensions of subnormals from XFmode to TFmode signal underflow if traps enabled.
This patch fixes a soft-fp corner case I previously noted in
<https://sourceware.org/ml/libc-alpha/2013-10/msg00349.html>: when
trapping on underflow is enabled, extensions of subnormals from XFmode
to TFmode need to signal underflow because the result is tiny (but
exact, so the underflow flag is not raised unless trapping is
enabled).

To avoid any excess initialization or tests for other cases of
floating-point extensions, a new FP_INIT_TRAPPING_EXCEPTIONS is added
that does the initialization required for this particular case (more
than FP_INIT_EXCEPTIONS, less than FP_INIT_ROUNDMODE, in general), and
FP_NO_EXACT_UNDERFLOW is added to stub out FP_TRAPPING_EXCEPTIONS
tests for those cases of extensions where the test would be dead code,
to avoid any uninitialized variable warnings.

As the relevant case only applies in libgcc, not to any use of soft-fp
in glibc, there is no bug report in Bugzilla and no non-default
definitions of FP_INIT_TRAPPING_EXCEPTIONS are added by the patch.  A
testcase will be added to GCC as part of an update of soft-fp in
libgcc once this patch is in libc.

Tested for powerpc-nofpu that the disassembly of installed shared
libraries is unchanged by this patch.  Bootstrapped GCC with updated
soft-fp with no regressions on x86_64-unknown-linux-gnu and verified
that a test of the relevant case passes where it failed before.

	* soft-fp/op-common.h (FP_EXTEND): When a subnormal input produces
	a subnormal result, set the underflow exception if trapping on
	underflow is enabled.
	* soft-fp/soft-fp.h (FP_INIT_TRAPPING_EXCEPTIONS): New macro.
	(FP_INIT_EXCEPTIONS): Default to FP_INIT_TRAPPING_EXCEPTIONS.
	[FP_NO_EXACT_UNDERFLOW] (FP_TRAPPING_EXCEPTIONS): Undefine and
	redefine to 0.
	* soft-fp/extenddftf2.c (FP_NO_EXACT_UNDERFLOW): Define.
	* soft-fp/extendsfdf2.c (FP_NO_EXACT_UNDERFLOW): Likewise.
	* soft-fp/extendsftf2.c (FP_NO_EXACT_UNDERFLOW): Likewise.
	* soft-fp/extendxftf2.c (__extendxftf2): Use
	FP_INIT_TRAPPING_EXCEPTIONS instead of FP_INIT_ROUNDMODE.
2014-10-09 01:00:41 +00:00
Joseph Myers
2d6a47ba4c soft-fp: Remove FP_CLEAR_EXCEPTIONS.
As noted in
<https://sourceware.org/ml/libc-alpha/2013-10/msg00516.html>, the
soft-fp macro FP_CLEAR_EXCEPTIONS should not be necessary, as soft-fp
code should never set an exception and later clear it.

In fact, all four uses in glibc (for SPARC) are indeed unnecessary:
they appear in files that convert 32-bit or 64-bit integers to IEEE
binary128, an operation that can never raise any exceptions.  If this
was intended to enable the compiler to optimize away any FP_FROM_INT
code testing for exceptional cases, we now have a better way of doing
this: defining FP_NO_EXCEPTIONS before including soft-fp.h causes all
code handling exceptions to be stubbed out, and the rounding mode to
be hardwired for round-to-zero, to allow such optimizations for source
files where (a) the operation in question, for the particular types in
question, can never raise exceptions, but (b) some instances of the
operation for other types can, so the macros used in the file do
contain references to rounding or exceptions, albeit dead in that
particular file.

The uses in the Linux kernel are also unnecessary (clearing exceptions
at a point where they are already cleared).

This patch duly removes FP_CLEAR_EXCEPTIONS, making the SPARC code in
question use FP_NO_EXCEPTIONS and stop using exception-related macros.

	* soft-fp/soft-fp.h (FP_CLEAR_EXCEPTIONS): Remove macro.
	* sysdeps/sparc/sparc32/soft-fp/q_itoq.c: Define FP_NO_EXCEPTIONS.
	(_Q_itoq): Do not use FP_DECL_EX, FP_CLEAR_EXCEPTIONS or
	FP_HANDLE_EXCEPTIONS.
	* sysdeps/sparc/sparc32/soft-fp/q_lltoq.c: Define FP_NO_EXCEPTIONS.
	(_Q_lltoq): Do not use FP_DECL_EX, FP_CLEAR_EXCEPTIONS or
	FP_HANDLE_EXCEPTIONS.
	* sysdeps/sparc/sparc32/soft-fp/q_ulltoq.c: Define FP_NO_EXCEPTIONS.
	(_Q_ulltoq): Do not use FP_DECL_EX, FP_CLEAR_EXCEPTIONS or
	FP_HANDLE_EXCEPTIONS.
	* sysdeps/sparc/sparc32/soft-fp/q_utoq.c: Define FP_NO_EXCEPTIONS.
	(_Q_utoq): Do not use FP_DECL_EX, FP_CLEAR_EXCEPTIONS or
	FP_HANDLE_EXCEPTIONS.
2014-10-09 00:58:42 +00:00
Joseph Myers
620f462e88 Don't use INTUSE with __adjtimex (bug 14132).
Bug 14132 is removal of the old INTDEF/INTUSE system of *_internal
aliases as obsoleted by the hidden_proto / hidden_def system.  Various
cases were cleaned up in 2012, but some remain.  This patch removes
the use of this mechanism for __adjtimex.

Tested for x86_64 that stripped installed shared libraries are
unchanged by the patch.

	[BZ #14132]
	* sysdeps/unix/sysv/linux/include/sys/timex.h: New file.
	* sysdeps/unix/sysv/linux/adjtime.c [!ADJTIMEX] (ADJTIMEX): Do not
	use INTUSE.
	[!ADJTIMEX] (INTUSE(__adjtimex)): Remove declaration.
	* sysdeps/unix/sysv/linux/alpha/adjtime.c (__adjtimex_internal):
	Remove alias.
	(__adjtimex): Define using libc_hidden_ver.
	* sysdeps/unix/sysv/linux/ntp_gettime.c (INTUSE(__adjtimex)):
	Remove declaration.
	(ntp_gettime): Call __adjtimex directly.
	* sysdeps/unix/sysv/linux/ntp_gettimex.c (INTUSE(__adjtimex)):
	Remove declaration.
	(ntp_gettimex): Call __adjtimex directly.
	* sysdeps/unix/sysv/linux/syscalls.list (adjtimex): Remove
	__adjtimex_internal alias.
2014-10-08 23:19:32 +00:00
Roland McGrath
c763c5d271 BZ#17460: Fix buffer overrun in nscd --help. 2014-10-08 15:36:12 -07:00
Roland McGrath
7b8fb2b8db Remove unnecessarily nested function in do_lookup_unique. 2014-10-08 15:18:02 -07:00
Joseph Myers
f7b425175c Support and use mixed compat/non-compat aliases in syscalls.list.
This patch enables syscalls.list entries to specify both compat and
non-compat symbol versions for the same syscall definition, making use
of this for setrlimit / chown / lchown where the inability to specify
such aliases showed up in the course of work on bug 14138.

The change to make-syscalls.sh is minimal: adding a SHARED conditional
on the compat_symbol calls.  It remains the case that if a compat
symbol version is specified, the syscall is only built for the shared
library at all if an explicit symbol version is given for a non-compat
symbol (so it's necessary to specify "lchown@@GLIBC_2.0
chown@GLIBC_2.0" rather than just "lchown chown@GLIBC_2.0").  It also
remains the case, as already commented in make-syscalls.sh, that no
SHLIB_COMPAT conditionals are generated, so there would be problems if
the same syscalls.list file, with compat symbols, were used for both
configurations that should have those symbols and configurations for
which they should be conditioned out with SHLIB_COMPAT.

Tested for x86.

	* sysdeps/unix/make-syscalls.sh (emit_weak_aliases): Condition
	compat_symbol calls on [SHARED].
	* sysdeps/unix/sysv/linux/powerpc/lchown.S: Remove file.
	* sysdeps/unix/sysv/linux/i386/syscalls.list (oldsetrlimit):
	Remove.
	(setrlimit): Add setrlimit@GLIBC_2.0 alias.
	* sysdeps/unix/sysv/linux/m68k/m680x0/syscalls.list
	(oldsetrlimit): Remove.
	(setrlimit): Add setrlimit@GLIBC_2.0 alias.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/syscalls.list
	(lchown): New syscall entry.
	(oldsetrlimit): Remove.
	(setrlimit): Add setrlimit@GLIBC_2.0 alias.
	* sysdeps/unix/sysv/linux/s390/s390-32/syscalls.list
	(oldsetrlimit): Remove.
	(setrlimit): Add setrlimit@GLIBC_2.0 alias.
2014-10-06 22:58:59 +00:00
Joseph Myers
abb280f799 Move some chown / lchown / fchown definitions to syscalls.list (bug 14138).
Continuing the move of syscall definitions to syscalls.list, where the
removal of support for old kernel versions has made this possible,
this patch moves various definitions of chown, lchown and fchown.

In most cases the need for special syscalls.list entries (rather than
existing generic ones) is because these architectures use chown32,
lchown32 and fchown32 as syscall names.  Some architectures also have
symbol versioning compatibility for older versions of chown having
been equivalent to lchown.

In the case of powerpc, chown.c (providing the chown@@GLIBC_2.1
default version) is replaced by a syscalls.list entry (for powerpc32;
powerpc64 has no need for this because of its more recent minimum
symbol version, so can just use the entry in
sysdeps/unix/syscalls.list), but lchown.S is left as-is because it
provides the compat version of chown as an actual alias for __lchown,
which is not yet supported by syscalls.list.  This file can be removed
once such aliases are supported in syscalls.list.

	[BZ #14138]
	* sysdeps/unix/sysv/linux/arm/fchown.c: Remove file.
	* sysdeps/unix/sysv/linux/arm/lchown.c: Likewise.
	* sysdeps/unix/sysv/linux/m68k/fchown.c: Likewise.
	* sysdeps/unix/sysv/linux/m68k/lchown.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/chown.c: Likewise.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (lchown): Add syscall.
	(fchown): Likewise.
	* sysdeps/unix/sysv/linux/m68k/syscalls.list (lchown): Likewise.
	(fchown): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/syscalls.list (chown):
	Likewise.
2014-10-06 22:30:54 +00:00
Adhemerval Zanella
47d4623785 powerpc: remove linux lowlevellock.h
This patch remove the powerpc specific lowlevellock.h and adjust some
implementation that rely on __lll_[rel/acq]_instr defines.
2014-10-06 16:08:32 -05:00
Chris Metcalf
563a74d86c tile: fix copyright header blocks in just-committed files
I accidentally committed versions not following the conventions.
2014-10-06 13:47:02 -04:00
Chris Metcalf
845a73434c tile: add clock_gettime support via vDSO 2014-10-06 11:22:14 -04:00
Chris Metcalf
83d641efd1 tile: make the prolog of clone() more conformant
With this change we properly set up the frame first, and tear
it down last, doing argument checking only when the frame is set up.
2014-10-06 11:21:29 -04:00
Chris Metcalf
d9cd52e64d tile: optimize memcmp
Customize memcmp.c for tile, using similar tricks from memcpy:

- replace MERGE macro with dblalign.
- replace memcmp_bytes function with revbytes.
- use __glibc_likely.
- use post-increment addressing.

The schedule is still not perfect: the compiler is not hoisting
code above the comparison branch, which could save a bundle or two.
memcmp speeds up by 30-40% on shorter aligned tests in benchtest,
with some tests with unaligned lengths taking a small performance hit.
2014-10-06 11:20:59 -04:00
Chris Metcalf
4b68ea1162 tile: add support for _SC_LEVEL*CACHE* sysconf() queries 2014-10-06 11:20:30 -04:00
Chris Metcalf
c86f7b80f4 tilegx: provide optimized strnlen, strstr, and strcasestr
strnlen() is based on the existing tile strlen() with length
checking added.  It speeds up by up to 5x, but on average across
the benchtest corpus by around 35%.  No regressions are seen.

strstr() does 8-byte aligned loads and compares using a 2-byte
filter on the first two bytes of the needle and then testing
the remaining bytes in needle using memcmp().  It speeds up
about 5x in the best case (for "found" needles), about 2x looking
at benchtest as a whole, with some slowdowns as much as 45%.
on a few cases (including the "fail" case for 128KB search).

strcasestr() is based on strstr() but uses a SIMD tolower
routine to convert 8-bytes to lower case in 5 instructions.
It also uses a 2-byte filter and then strncasecmp() for the
remaining bytes.  strncasecmp() is not optimized for SIMD, so
there is futher room for improvement.  However, it is still up
to 16x faster for "found" needles, averaging 2x faster on the
whole corpus of benchtests.  It does slow down by up to 35%
on a few cases, similarly to strstr().
2014-10-06 11:19:18 -04:00
Chris Metcalf
1c4c1a6f4d tilegx: optimize string copy_byte() internal function
We can use one "shufflebytes" instruction instead of 3 "bfins"
instructions to optimize the string functions.
2014-10-06 11:18:41 -04:00
Arjun Shankar
99d86ea324 Write errors to stdout and not stderr in nptl/tst-setuid3.c
nptl/tst-setuid3.c was using the `err' and `errx' functions to write
error messages. This wrote to stderr instead of the preferred stdout.
2014-10-06 10:23:17 +05:30
Kostya Serebryany
06210a44e9 remove nested functions from elf/dl-deps.c 2014-10-01 14:34:45 -07:00
Joseph Myers
6268f532b6 Move execve to syscalls.list (bug 14138).
Continuing the move of syscall definitions to syscalls.list, where
previous cleanups have made this possible, this patch moves the
definition of execve.  (In this case, it was the removal of bounded
pointers support, rather than old kernel support, which made the move
possible.)

Tested for x86_64.

	[BZ #14138]
	* sysdeps/unix/sysv/linux/execve.c: Remove file.
	* sysdeps/unix/sysv/linux/syscalls.list (execve): Add syscall.
2014-10-01 20:58:20 +00:00
Steve Ellcey
7a34129911 Remove extra whitespace from end of line. 2014-10-01 13:46:51 -07:00
Steve Ellcey
b925285f98 * sysdeps/mips/strcmp.S: New. 2014-10-01 13:45:50 -07:00
Joseph Myers
754a15c61c Move some *at definitions to syscalls.list (bug 14138).
Continuing the move of syscall definitions to syscalls.list, where the
removal of support for old kernel versions has made this possible,
this patch moves definitions of various *at functions in
sysdeps/unix/sysv/linux/.

These particular moves are straightforward: there are no #includes of
these source files, no special architecture-specific versions, no
special symbol version handling and no aliases.  Each source file can
be replaced by a single line in sysdeps/unix/sysv/linux/syscalls.list.

Tested for x86_64.

	[BZ #14138]
	* sysdeps/unix/sysv/linux/syscalls.list (fchownat): New syscall.
	(linkat): Likewise.
	(mkdirat): Likewise.
	(readlinkat): Likewise.
	(renameat): Likewise.
	(symlinkat): Likewise.
	(unlinkat): Likewise.
	* sysdeps/unix/sysv/linux/fchownat.c: Remove file.
	* sysdeps/unix/sysv/linux/linkat.c: Likewise.
	* sysdeps/unix/sysv/linux/mkdirat.c: Likewise.
	* sysdeps/unix/sysv/linux/readlinkat.c: Likewise.
	* sysdeps/unix/sysv/linux/renameat.c: Likewise.
	* sysdeps/unix/sysv/linux/symlinkat.c: Likewise.
	* sysdeps/unix/sysv/linux/unlinkat.c: Likewise.
2014-09-30 14:32:08 +00:00
Will Newton
dc6fe23ba6 stdlib/tst-strtod-round.c: Fix build on ARM
Building this test on ARM fails because the prototypes for the long
double variants of the math functions are unavailable.

Add an additional include guard to math.h that enables long double math
function declarations if _LIBC_TEST is defined and define _LIBC_TEST in
stdlib/tst-strtod-round.c.

ChangeLog:

2014-09-30  Will Newton  <will.newton@linaro.org>

	* math/math.h: Define long double math functions if
	_LIBC_TEST is defined.
	* stdlib/tst-strtod-round.c: Define _LIBC_TEST.
2014-09-30 15:03:50 +01:00
Will Newton
85bb81c91b Allow cross-building of tests
Allow building tests in a cross configuration without a test wrapper
defined. This is helpful for doing simple build testing of tests.

ChangeLog:

2014-09-30  Will Newton  <will.newton@linaro.org>

	* localedata/Makefile: Move assignment to tests-special
	into an ifdef testing run-built-tests.
	* timezone/Makefile: Likewise.
2014-09-30 15:02:41 +01:00
Joseph Myers
b7e02da4e9 Run tst-ld-sse-use.sh with bash.
tst-ld-sse-use.sh is a bash script, not a POSIX shell script, and so
needs to be run with $(BASH) not $(SHELL) to avoid errors of the form:

../sysdeps/x86/tst-ld-sse-use.sh: 41: ../sysdeps/x86/tst-ld-sse-use.sh: declare: not found

(when /bin/sh is dash).  This patch makes that change.

Tested for x86_64.

	* sysdeps/x86/Makefile ($(objpfx)tst-ld-sse-use.out): Run script
	with $(BASH) not $(SHELL).
2014-09-29 23:24:37 +00:00
Carlos O'Donell
62058ce612 Correctly size profiling reloc table (bug 17411)
During auditing or profiling modes the dynamic loader
builds a cache of the relocated PLT entries in order
to reuse them when called again through the same PLT
entry. This way the PLT entry is never completed and
the call into the resolver always results in profiling
or auditing code running.

The problem is that the PLT relocation cache size
is not computed correctly. The size of the cache
should be "Size of a relocation result structure"
x "Number of PLT-related relocations". Instead the
code erroneously computes "Size of a relocation
result" x "Number of bytes worth of PLT-related
relocations". I can only assume this was a mistake
in the understanding of the value of DT_PLTRELSZ
which is the number of bytes of PLT-related relocs.
We do have a DT_RELACOUNT entry, which is a count
for dynamic relative relocs, but we have no
DT_PLTRELCOUNT and thus we need to compute it.

This patch corrects the computation of the size of the
relocation table used by the glibc profiling code.

For more details see:
https://sourceware.org/ml/libc-alpha/2014-09/msg00513.html

	[BZ #17411]
	* elf/dl-reloc.c (_dl_relocate_object): Allocate correct amount for
	l_reloc_result.
2014-09-29 14:15:02 -04:00
Kostya Serebryany
8e257a2959 remove nested function hack_digit 2014-09-29 10:46:05 -07:00