Go to file
H.J. Lu 0c5b8b5941 Add INLINE_SYSCALL_RETURN/INLINE_SYSCALL_ERROR_RETURN
For ia32 PIC, the first thing of many syscalls does is to call
__x86.get_pc_thunk.reg to load PC into reg in case there is an error,
which is required for setting errno.  In most cases, there are no
errors.  But we still call __x86.get_pc_thunk.reg.  This patch adds
INLINE_SYSCALL_RETURN and INLINE_SYSCALL_ERROR_RETURN so that i386
can optimize setting errno by branching to the internal __syscall_error
without PLT.

INLINE_SYSCALL_ERROR_RETURN is designed to take the negative error
number returned from the majority of Linux kernels for which negating
is a no-op with INTERNAL_SYSCALL_ERRNO.

With i386 INLINE_SYSCALL_RETURN, INLINE_SYSCALL_ERROR_RETURN and
i386 syscall inlining optimization for GCC 5, for
sysdeps/unix/sysv/linux/fchmodat.c with -O2 -march=i686
-mtune=generic, GCC 5.2 now generates:

<fchmodat>:
   0:	push   %ebx
   1:	mov    0x14(%esp),%eax
   5:	mov    0x8(%esp),%ebx
   9:	mov    0xc(%esp),%ecx
   d:	mov    0x10(%esp),%edx
  11:	test   $0xfffffeff,%eax
  16:	jne    38 <fchmodat+0x38>
  18:	test   $0x1,%ah
  1b:	jne    48 <fchmodat+0x48>
  1d:	mov    $0x132,%eax
  22:	call   *%gs:0x10
  29:	cmp    $0xfffff000,%eax
  2e:	ja     58 <fchmodat+0x58>
  30:	pop    %ebx
  31:	ret
  32:	lea    0x0(%esi),%esi
  38:	pop    %ebx
  39:	mov    $0xffffffea,%eax
  3e:	jmp    3f <fchmodat+0x3f>	3f: R_386_PC32	__syscall_error
  43:	nop
  44:	lea    0x0(%esi,%eiz,1),%esi
  48:	pop    %ebx
  49:	mov    $0xffffffa1,%eax
  4e:	jmp    4f <fchmodat+0x4f>	4f: R_386_PC32	__syscall_error
  53:	nop
  54:	lea    0x0(%esi,%eiz,1),%esi
  58:	pop    %ebx
  59:	jmp    5a <fchmodat+0x5a>	5a: R_386_PC32	__syscall_error

instead of

<fchmodat>:
   0:	sub    $0x8,%esp
   3:	mov    0x18(%esp),%eax
   7:	mov    %ebx,(%esp)
   a:	call   b <fchmodat+0xb>	b: R_386_PC32	__x86.get_pc_thunk.bx
   f:	add    $0x2,%ebx	11: R_386_GOTPC	_GLOBAL_OFFSET_TABLE_
  15:	mov    %edi,0x4(%esp)
  19:	test   $0xfffffeff,%eax
  1e:	jne    70 <fchmodat+0x70>
  20:	test   $0x1,%ah
  23:	jne    88 <fchmodat+0x88>
  25:	mov    0x14(%esp),%edx
  29:	mov    0x10(%esp),%ecx
  2d:	mov    0xc(%esp),%edi
  31:	xchg   %ebx,%edi
  33:	mov    $0x132,%eax
  38:	call   *%gs:0x10
  3f:	xchg   %edi,%ebx
  41:	cmp    $0xfffff000,%eax
  46:	ja     58 <fchmodat+0x58>
  48:	mov    (%esp),%ebx
  4b:	mov    0x4(%esp),%edi
  4f:	add    $0x8,%esp
  52:	ret
  53:	nop
  54:	lea    0x0(%esi,%eiz,1),%esi
  58:	mov    0x0(%ebx),%edx	5a: R_386_TLS_GOTIE	__libc_errno
  5e:	neg    %eax
  60:	mov    %eax,%gs:(%edx)
  63:	mov    $0xffffffff,%eax
  68:	jmp    48 <fchmodat+0x48>
  6a:	lea    0x0(%esi),%esi
  70:	mov    0x0(%ebx),%eax	72: R_386_TLS_GOTIE	__libc_errno
  76:	movl   $0x16,%gs:(%eax)
  7d:	mov    $0xffffffff,%eax
  82:	jmp    48 <fchmodat+0x48>
  84:	lea    0x0(%esi,%eiz,1),%esi
  88:	mov    0x0(%ebx),%eax	8a: R_386_TLS_GOTIE	__libc_errno
  8e:	movl   $0x5f,%gs:(%eax)
  95:	mov    $0xffffffff,%eax
  9a:	jmp    48 <fchmodat+0x48>

	* sysdeps/unix/sysdep.h (INLINE_SYSCALL_RETURN): New.
	(INLINE_SYSCALL_ERROR_RETURN): Likewise.
	* sysdeps/unix/sysv/linux/adjtime.c (ADJTIME): Use
	INLINE_SYSCALL_RETURN and INLINE_SYSCALL_ERROR_RETURN.
	* sysdeps/unix/sysv/linux/aio_sigqueue.c (__aio_sigqueue):
	Likewise.
	* sysdeps/unix/sysv/linux/dl-openat64.c (openat64): Likewise.
	* sysdeps/unix/sysv/linux/eventfd.c (eventfd): Likewise.
	* sysdeps/unix/sysv/linux/faccessat.c (faccessat): Likewise.
	* sysdeps/unix/sysv/linux/fchmodat.c (fchmodat): Likewise.
	* sysdeps/unix/sysv/linux/fcntl.c (do_fcntl): Likewise.
	* sysdeps/unix/sysv/linux/fstatfs64.c (__fstatfs64): Likewise.
	* sysdeps/unix/sysv/linux/ftruncate64.c (__ftruncate64): Likewise.
	* sysdeps/unix/sysv/linux/futimens.c (futimens): Likewise.
	* sysdeps/unix/sysv/linux/futimes.c (__futimes): Likewise.
	* sysdeps/unix/sysv/linux/futimesat.c (futimesat): Likewise.
	* sysdeps/unix/sysv/linux/fxstat.c (__fxstat): Likewise.
	* sysdeps/unix/sysv/linux/fxstat64.c (___fxstat64): Likewise.
	* sysdeps/unix/sysv/linux/fxstatat.c (__fxstatat): Likewise.
	* sysdeps/unix/sysv/linux/fxstatat64.c (__fxstatat64): Likewise.
	* sysdeps/unix/sysv/linux/gai_sigqueue.c (__gai_sigqueue):
	Likewise.
	* sysdeps/unix/sysv/linux/getpriority.c (__getpriority): Likewise.
	* sysdeps/unix/sysv/linux/getrlimit64.c (__getrlimit64): Likewise.
	* sysdeps/unix/sysv/linux/llseek.c (__llseek): Likewise.
	* sysdeps/unix/sysv/linux/lutimes.c (lutimes): Likewise.
	* sysdeps/unix/sysv/linux/lxstat.c (__lxstat): Likewise.
	* sysdeps/unix/sysv/linux/lxstat64.c (___lxstat64): Likewise.
	* sysdeps/unix/sysv/linux/mmap64.c (__mmap64): Likewise.
	* sysdeps/unix/sysv/linux/mq_close.c (mq_close): Likewise.
	* sysdeps/unix/sysv/linux/mq_open.c (__mq_open): Likewise.
	* sysdeps/unix/sysv/linux/mq_unlink.c (mq_unlink): Likewise.
	* sysdeps/unix/sysv/linux/msgget.c (msgget): Likewise.
	* sysdeps/unix/sysv/linux/prlimit.c (prlimit): Likewise.
	* sysdeps/unix/sysv/linux/pt-raise.c (raise): Likewise.
	* sysdeps/unix/sysv/linux/raise.c (raise): Likewise.
	* sysdeps/unix/sysv/linux/readahead.c (__readahead): Likewise.
	* sysdeps/unix/sysv/linux/reboot.c (reboot): Likewise.
	* sysdeps/unix/sysv/linux/semget.c (semget): Likewise.
	* sysdeps/unix/sysv/linux/semop.c (semop): Likewise.
	* sysdeps/unix/sysv/linux/semtimedop.c (semtimedop): Likewise.
	* sysdeps/unix/sysv/linux/setrlimit64.c (setrlimit64): Likewise.
	* sysdeps/unix/sysv/linux/shmat.c (shmat): Likewise.
	* sysdeps/unix/sysv/linux/shmdt.c (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/shmget.c (shmget): Likewise.
	* sysdeps/unix/sysv/linux/signalfd.c (signalfd): Likewise.
	* sysdeps/unix/sysv/linux/sigpending.c (sigpending): Likewise.
	* sysdeps/unix/sysv/linux/sigprocmask.c ( __sigprocmask): Likewise.
	* sysdeps/unix/sysv/linux/sigqueue.c (__sigqueue): Likewise.
	* sysdeps/unix/sysv/linux/speed.c (cfsetospeed): Likewise.
	* sysdeps/unix/sysv/linux/statfs64.c (__statfs64): Likewise.
	* sysdeps/unix/sysv/linux/sysctl.c (__sysctl): Likewise.
	* sysdeps/unix/sysv/linux/tcsendbrk.c (tcsendbreak): Likewise.
	* sysdeps/unix/sysv/linux/tcsetattr.c (tcsetattr): Likewise.
	* sysdeps/unix/sysv/linux/timer_getoverr.c (timer_getoverrun):
	Likewise.
	* sysdeps/unix/sysv/linux/timer_gettime.c (timer_gettime):
	Likewise.
	* sysdeps/unix/sysv/linux/timer_settime.c (timer_settime):
	Likewise.
	* sysdeps/unix/sysv/linux/truncate64.c (truncate64): Likewise.
	* sysdeps/unix/sysv/linux/ustat.c (ustat): Likewise.
	* sysdeps/unix/sysv/linux/utimensat.c (utimensat): Likewise.
	* sysdeps/unix/sysv/linux/utimes.c (__utimes): Likewise.
	* sysdeps/unix/sysv/linux/xmknod.c (__xmknod): Likewise.
	* sysdeps/unix/sysv/linux/xmknodat.c (__xmknodat): Likewise.
	* sysdeps/unix/sysv/linux/xstat.c (__xstat): Likewise.
	* sysdeps/unix/sysv/linux/xstat64.c (___xstat64): Likewise.
	* sysdeps/unix/sysv/linux/xstatconv.c (__xstat_conv): Likewise.
	(__xstat64_conv): Likewise.
	(__xstat32_conv): Likewise.
	* sysdeps/unix/sysv/linux/sched_getaffinity.c
	(__sched_getaffinity_new): Add libc_hidden_proto and
	libc_hidden_def.  Use INLINE_SYSCALL_ERROR_RETURN.
2015-08-21 04:46:53 -07:00
argp Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
assert Add ersatz _Static_assert on older C hosts 2015-02-07 14:43:27 -08:00
benchtests Reflect renaming of bh_IN and tu_IN in SUPPORTED file [BZ #17475] 2015-07-20 22:09:07 -04:00
bits Add SIGWINCH to generic <bits/signum.h>. 2015-07-23 16:44:47 -07:00
catgets Fix trailing space. 2015-08-08 15:54:40 -07:00
conf (NEED_INETADDR, NEED_INETATON): Define to 1, not empty. 1995-09-08 20:24:57 +00:00
conform Fix spurious conform test failures 2015-07-27 16:13:55 +02:00
crypt Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
csu Fix gcrt0.o compilation 2015-08-07 01:38:39 +02:00
ctype Fix isblank / isascii / toascii namespace (bug 17635). 2015-01-05 15:06:57 +00:00
debug Fix BZ #18084 -- backtrace (..., 0) dumps core on x86. 2015-08-15 11:42:43 -07:00
dirent Modify several tests to use test-skeleton.c 2015-08-06 02:59:04 -04:00
dlfcn Convert dlfcn/tststatic to use test-skeleton. 2015-03-27 12:55:25 -07:00
elf Fix dynamic linker issue with bind-now 2015-08-19 05:37:01 -07:00
gmon Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
gnulib Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
grp Fix grp.h endgrent, getgrent namespace (bug 18528). 2015-06-12 22:29:19 +00:00
gshadow Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
hesiod Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
hurd Fix warnings 2015-03-21 04:49:44 +01:00
iconv Convert tst-iconv3 to use test-skeleton. 2015-02-25 16:01:13 -08:00
iconvdata fix non-portable echo -n usage 2015-08-09 04:19:12 -04:00
include Update version.h and include/features.h for 2.22 release 2015-08-05 02:42:21 -04:00
inet Modify several tests to use test-skeleton.c 2015-08-06 02:59:04 -04:00
intl Remove obsolete aliases that broke 'locale -a' 2015-05-22 15:12:01 -07:00
io Readd O_LARGEFILE flag for openat64 (bug 18781) 2015-08-10 18:10:19 +02:00
libidn Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
libio Fix BZ #18820 -- fmemopen may leak memory on failure. 2015-08-12 23:51:04 -07:00
locale Also check dead->data[category] != NULL 2015-08-05 08:15:51 -07:00
localedata relocate localedata ChangeLog entries 2015-08-19 17:55:06 -04:00
login Fix -Wundef warnings in login/tst-utmp.c. 2015-08-19 00:50:17 +00:00
mach mach: fix typo 2015-06-06 11:48:42 +02:00
malloc malloc: Do not corrupt the top of a threaded heap if top chunk is MINSIZE [BZ #18502] 2015-06-26 22:47:45 +02:00
manual Fix exponents in manual. 2015-08-20 09:43:50 +02:00
math Don't use -Wno-uninitialized in math/. 2015-08-20 18:00:09 +00:00
mathvec This is update for configure, build and install of vector math library. 2015-05-14 18:07:06 +03:00
misc regexp.h: update Versions to match file usage [BZ #18681] 2015-08-18 09:28:10 -04:00
nis Separate internal state between getXXent and getXXbyYY NSS calls (bug 18007) 2015-05-11 10:41:49 +02:00
nptl gawk: fix gensub usage 2015-08-09 04:19:17 -04:00
nptl_db Fix DTV race, assert, DTV_SURPLUS Static TLS limit, and nptl_db garbage 2015-03-17 00:31:49 -03:00
nscd nscd: drop selinux/flask.h include 2015-07-08 03:18:27 -04:00
nss fix non-portable echo -n usage 2015-08-09 04:19:12 -04:00
po Updated translations for 2.22. 2015-08-01 14:48:31 -04:00
posix Fix BZ #18086 -- nice resets errno to 0. 2015-08-11 23:40:00 -07:00
pwd pwd.h: revert __nonnull markings on putpwent [BZ #18641] 2015-07-27 23:45:49 -04:00
resolv Modify several tests to use test-skeleton.c 2015-08-06 02:59:04 -04:00
resource Fix nice getpriority, setpriority namespace (bug 18553). 2015-06-17 20:22:39 +00:00
rt Fix mq_receive, mq_send mq_timed* namespace (bug 18545). 2015-06-17 20:19:04 +00:00
scripts [BZ #18796] 2015-08-19 16:54:28 +03:00
setjmp Modify several tests to use test-skeleton.c 2015-07-15 15:10:23 +05:30
shadow Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
signal Fix psignal, psiginfo declaration conditions (bug 18483). 2015-06-05 21:14:16 +00:00
socket Fix mq_notify socket, recv namespace (bug 18546). 2015-06-17 20:20:08 +00:00
soft-fp Fix soft-fp fma for -Wuninitialized. 2015-05-22 20:28:50 +00:00
stdio-common fix non-portable echo -n usage 2015-08-09 04:19:12 -04:00
stdlib fix missing ctype.h include 2015-08-06 02:59:52 -04:00
streams Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
string Improve stpncpy performance by using __strnlen/memcpy/memset rather than a 2015-08-19 16:32:12 +01:00
sunrpc Use calloc to allocate xports (BZ #17542) 2015-03-18 14:51:26 +05:30
sysdeps Add INLINE_SYSCALL_RETURN/INLINE_SYSCALL_ERROR_RETURN 2015-08-21 04:46:53 -07:00
sysvipc Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
termios Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
time Modify several tests to use test-skeleton.c 2015-08-06 02:59:04 -04:00
timezone Don't use -Wno-strict-prototypes in timezone/. 2015-08-20 20:51:22 +00:00
wcsmbs Updated __nonnull annotations for wcscat, wcsncat, wcscmp and wcsncmp [BZ #18265] 2015-08-05 04:43:42 -04:00
wctype Fix regex wctype namespace (bug 18495). 2015-06-05 20:04:47 +00:00
.gitattributes exempt timezone files from the no-bad-whitespace policy 2009-06-15 18:15:54 +02:00
.gitignore Add *.pyc to .gitignore 2015-05-18 15:26:26 +05:30
abi-tags Add arm-nacl port. 2015-04-17 09:02:19 -07:00
aclocal.m4 Make aclocal.m4 comment mention updating install.texi for autoconf version. 2014-10-31 22:44:17 +00:00
BUGS [BZ #5222] 2007-10-28 08:24:07 +00:00
ChangeLog Add INLINE_SYSCALL_RETURN/INLINE_SYSCALL_ERROR_RETURN 2015-08-21 04:46:53 -07:00
ChangeLog.1 * Makefile (distribute): Add ChangeLog.[0-9]. 1995-04-14 03:52:54 +00:00
ChangeLog.2 * Makefile (distribute): Add ChangeLog.[0-9]. 1995-04-14 03:52:54 +00:00
ChangeLog.3 * Makefile (distribute): Add ChangeLog.[0-9]. 1995-04-14 03:52:54 +00:00
ChangeLog.4 * Makefile (distribute): Add ChangeLog.[0-9]. 1995-04-14 03:52:54 +00:00
ChangeLog.5 * sysdeps/posix/getaddrinfo.c: Implement configuration file 2006-05-04 06:38:07 +00:00
ChangeLog.6 Update. 1997-07-22 00:10:33 +00:00
ChangeLog.7 Update. 1997-11-18 02:50:07 +00:00
ChangeLog.8 Update. Old logs are in ChangeLog.7. 1998-08-11 18:44:11 +00:00
ChangeLog.9 Update. 2000-04-28 06:14:43 +00:00
ChangeLog.10 Update. 2000-02-29 01:13:44 +00:00
ChangeLog.11 2.5-18.1 2007-07-12 18:26:36 +00:00
ChangeLog.12 2.5-18.1 2007-07-12 18:26:36 +00:00
ChangeLog.13 Update. 2002-10-03 16:37:04 +00:00
ChangeLog.14 Update. 2004-04-20 04:28:00 +00:00
ChangeLog.15 Split out ChangeLog.15 at 2.3 branch point 2005-02-16 07:34:17 +00:00
ChangeLog.16 Fix typo in name 2012-06-21 16:45:27 +02:00
ChangeLog.17 Revert "Sun agreed to a change of the license for the RPC code to a BSD-like license." 2010-06-27 19:34:03 -07:00
ChangeLog.old-ports Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-aarch64 Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-aix Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-alpha Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-am33 Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-arm Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-cris Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-hppa Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-ia64 Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-linux-generic Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-m68k Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-microblaze Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-mips Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-powerpc Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
ChangeLog.old-ports-tile Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory. 2014-04-30 10:40:29 -07:00
config.h.in [AArch64] Fix the big endian loader name. 2015-05-01 13:58:55 +01:00
config.make.in Support compilers defaulting to PIE 2015-06-25 02:49:53 -07:00
configure Support compilers defaulting to PIE 2015-06-25 02:49:53 -07:00
configure.ac Support compilers defaulting to PIE 2015-06-25 02:49:53 -07:00
CONFORMANCE Move __STDC_* predefined macros from features.h to stdc-predef.h. 2012-02-22 12:53:04 +00:00
COPYING Update to latest versions of GPL-2.0 and LGPL-2.1 2013-09-09 12:52:48 +10:00
COPYING.LIB Update to latest versions of GPL-2.0 and LGPL-2.1 2013-09-09 12:52:48 +10:00
cppflags-iterator.mk 2004-03-11 Jeroen Dekkers <jeroen@dekkers.cx> 2004-03-14 19:13:17 +00:00
extra-lib.mk Remove NOT_IN_libc 2014-11-24 15:03:45 +05:30
extra-modules.mk Remove NOT_IN_libc 2014-11-24 15:03:45 +05:30
gen-locales.mk Split locale generation snippet into a separate file 2015-05-13 13:05:28 +05:30
INSTALL Attempting to install glibc configured with --prefix=/usr into 2015-06-12 13:15:57 -06:00
libc-abis A few more archs have IFUNC support. 2010-03-17 02:43:12 -07:00
LICENSES Expand LICENSES file. 2012-12-05 21:56:15 +00:00
Makeconfig Don't use -Wno-error=undef. 2015-08-20 20:50:05 +00:00
Makefile Succeed if make check does not report any errors 2015-05-19 06:36:29 +05:30
Makefile.in Remove redundant C locale settings. 2014-06-07 19:58:36 +00:00
Makerules Fix some places to use $(LN_S) makefile variable. 2015-07-08 14:21:41 -07:00
NAMESPACE Add and update many more entries. 2000-03-20 00:42:58 +00:00
NEWS Fix exponents in manual. 2015-08-20 09:43:50 +02:00
o-iterator.mk Fri Mar 17 12:58:37 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> 1995-03-17 18:42:51 +00:00
PROJECTS Update. 2004-10-12 06:19:23 +00:00
README Another pointless update in README. 2015-02-11 14:39:30 -08:00
Rules Let tests result in UNSUPPORTED; use that for unbuildable C++ cases 2015-03-10 15:13:14 -07:00
shlib-versions This is update for configure, build and install of vector math library. 2015-05-14 18:07:06 +03:00
test-skeleton.c test-skeleton: add usage information 2015-08-05 04:40:00 -04:00
version.h Open development for 2.23. 2015-08-05 03:01:50 -04:00
WUR-REPORT * posix/unistd.h (setuid, setreuid, seteuid, setresuid): 2012-08-01 18:12:58 +02:00

This directory contains the sources of the GNU C Library.
See the file "version.h" for what release version you have.

The GNU C Library is the standard system C library for all GNU systems,
and is an important part of what makes up a GNU system.  It provides the
system API for all programs written in C and C-compatible languages such
as C++ and Objective C; the runtime facilities of other programming
languages use the C library to access the underlying operating system.

In GNU/Linux systems, the C library works with the Linux kernel to
implement the operating system behavior seen by user applications.
In GNU/Hurd systems, it works with a microkernel and Hurd servers.

The GNU C Library implements much of the POSIX.1 functionality in the
GNU/Hurd system, using configurations i[4567]86-*-gnu.  The current
GNU/Hurd support requires out-of-tree patches that will eventually be
incorporated into an official GNU C Library release.

When working with Linux kernels, this version of the GNU C Library
requires Linux kernel version 2.6.32 or later.

Also note that the shared version of the libgcc_s library must be
installed for the pthread library to work correctly.

The GNU C Library supports these configurations for using Linux kernels:

	aarch64*-*-linux-gnu
	alpha*-*-linux-gnu
	arm-*-linux-gnueabi
	hppa-*-linux-gnu	Not currently functional without patches.
	i[4567]86-*-linux-gnu
	x86_64-*-linux-gnu	Can build either x86_64 or x32
	ia64-*-linux-gnu
	m68k-*-linux-gnu
	microblaze*-*-linux-gnu
	mips-*-linux-gnu
	mips64-*-linux-gnu
	powerpc-*-linux-gnu	Hardware or software floating point, BE only.
	powerpc64*-*-linux-gnu	Big-endian and little-endian.
	s390-*-linux-gnu
	s390x-*-linux-gnu
	sh[34]-*-linux-gnu
	sparc*-*-linux-gnu
	sparc64*-*-linux-gnu
	tilegx-*-linux-gnu
	tilepro-*-linux-gnu

If you are interested in doing a port, please contact the glibc
maintainers; see http://www.gnu.org/software/libc/ for more
information.

See the file INSTALL to find out how to configure, build, and install
the GNU C Library.  You might also consider reading the WWW pages for
the C library at http://www.gnu.org/software/libc/.

The GNU C Library is (almost) completely documented by the Texinfo manual
found in the `manual/' subdirectory.  The manual is still being updated
and contains some known errors and omissions; we regret that we do not
have the resources to work on the manual as much as we would like.  For
corrections to the manual, please file a bug in the `manual' component,
following the bug-reporting instructions below.  Please be sure to check
the manual in the current development sources to see if your problem has
already been corrected.

Please see http://www.gnu.org/software/libc/bugs.html for bug reporting
information.  We are now using the Bugzilla system to track all bug reports.
This web page gives detailed information on how to report bugs properly.

The GNU C Library is free software.  See the file COPYING.LIB for copying
conditions, and LICENSES for notices about a few contributions that require
these additional notices to be distributed.  License copyright years may be
listed using range notation, e.g., 1996-2015, indicating that every year in
the range, inclusive, is a copyrightable year that would otherwise be listed
individually.