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2014-05-16Fix __waitpid_nocancel link error.linaro/masterRoland McGrath
2014-05-16PowerPC: clean BSD Terminal Modes expectation in termios.hAdhemerval Zanella
This patch guard the BSD definition for terminal modes in PowerPC specific header fixing the following conformance failures: FAIL: conform/POSIX/termios.h/conform FAIL: conform/POSIX2008/termios.h/conform FAIL: conform/UNIX98/termios.h/conform
2014-05-16ARM: Convert fork.c to arch-fork.hRoland McGrath
2014-05-16Add stub arch-fork.h header.Roland McGrath
2014-05-16Split arch-fork.h from fork.hRoland McGrath
2014-05-16SPARC: add prlimit and prlimit64 in <bits/resource.h> (BZ #16943)Aurelien Jarno
prlimit and prlimit64 have been added in the main <bits/resource.h>, but not in the SPARC specific version. Fix that. Note: this is Debian bug#703559, reported by Emilio Pozuelo Monfort <pochu@debian.org>
2014-05-16ptsname_r: don't leak uninitialized memory (BZ #16917)Aurelien Jarno
If the fd refers to a terminal device, but not a pty master, the TIOCGPTN ioctl returns with ENOTTY. This error is not caught, and the possibly undefined buffer passed to ptsname_r is sent directly to the stat64 syscall. Fix this by using a fallback to the old method only if the TIOCGPTN ioctl fails with EINVAL. This also fix the return value in that specific case (it return ENOENT without this patch). Also add tests to the ptsname_r function (and ptsname at the same time). Note: this is Debian bug#741482, reported by Jakub Wilk <jwilk@debian.org>
2014-05-14x86: Move abilist files out of nptl/ subdirectories.Roland McGrath
2014-05-14Move remaining files out of nptl/sysdeps/unix/sysv/linux/x86/.Roland McGrath
2014-05-14Fix mips fork after i386 reorganization.Roland McGrath
2014-05-14Move remaining nptl/sysdeps/unix/sysv/linux/i386/ files.Roland McGrath
2014-05-14Fix powerpc fork after i386 reorganization.Roland McGrath
2014-05-14Update alpha and ia64 timer_*.c files for x86_64 file moves.Roland McGrath
2014-05-14Move remaining nptl/sysdeps/unix/sysv/linux/x86_64/ files.Roland McGrath
2014-05-14x86: Consolidate NPTL fork.Roland McGrath
2014-05-14Consolidate not-cancel.h files.Roland McGrath
2014-05-14Move x86_64 compat-timer.h out of nptl/Roland McGrath
2014-05-14Move x86_64 timer_*.c out of nptl/Roland McGrath
2014-05-14x86: Consolidate NPTL/non versions of cloneRoland McGrath
2014-05-14x86: Consolidate NPTL/non versions of vforkRoland McGrath
2014-05-14ARM: Consolidate NPTL/non versions of vforkRoland McGrath
2014-05-14Fix macro warning on HAVE_PT_CHOWNAndreas Schwab
2014-05-14Reduce kernel-features.h duplication.Joseph Myers
This patch reduces duplication between different architectures' kernel-features.h files by making the architecture-independent file define various macros unconditionally (instead of only for a particular list of architectures), with the architecture-specific files then undefining the macros if necessary. Specifically, __ASSUME_O_CLOEXEC (O_CLOEXEC flag to open) and __ASSUME_SOCK_CLOEXEC (SOCK_NONBLOCK and SOCK_CLOEXEC flags to socket) are supported on all architectures as of 2.6.32 or the minimum kernel version for the architecture if later. For __ASSUME_IN_NONBLOCK, __ASSUME_PIPE2, __ASSUME_EVENTFD2, __ASSUME_SIGNALFD4 and __ASSUME_DUP3, the relevant syscalls were added for alpha in 2.6.33 but otherwise the features are available as of 2.6.32. For __ASSUME_UTIMES, support is everywhere in 2.6.32 except for asm-generic architectures and hppa. Although those were the main cases of duplication among kernel-features.h files, some other cases of unnecessary definitions were also cleaned up: the hppa file defined various macros that were either no longer used at all, or defined by the main file by default anyway, the ia64 file had duplicative definitions of __ASSUME_PSELECT and __ASSUME_PPOLL, while mips had such a definition of __ASSUME_IPC64. Really, rather than being defined in the main file then undefined for asm-generic architectures, __ASSUME_UTIMES should become an hppa-specific macro. Given that __ASSUME_ATFCTS and __ASSUME_UTIMENSAT are now always true, the only live __ASSUME_UTIMES conditional is in sysdeps/unix/sysv/linux/utimes.c, which is not used for asm-generic architectures. I think the desired state would be an hppa-specific file (that includes sysdeps/unix/sysv/linux/utimes.c if __ASSUME_UTIMES, and otherwise has fallback code), with the fallback code being removed from the main utimes.c. But I think that's most reasonably a separate cleanup once __ASSUME_ATFCTS and __ASSUME_UTIMESAT have both had conditional code cleaned up. Given this patch, I think it's straightforward to move non-ex-ports architectures to having their own kernel-features.h files, like ex-ports architectures, rather than conditionals in the main file (i.e., such a move won't require the architecture-specific file to contain anything that isn't genuinely architecture-specific), and would encourage architecture maintainers to do so. Tested x86_64 that the installed shared libraries are unchanged by this patch. Note that on some architectures this *will* cause __ASSUME_* macros to be defined in cases where they weren't previously but should have been (but this is just optimization, not a fix to a user-visible bug, so doesn't need a bug report in Bugzilla). * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_UTIMES): Define unconditionally. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/aarch64/kernel-features.h (__ASSUME_DUP3): Do not define. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_UTIMES): Undefine. * sysdeps/unix/sysv/linux/alpha/kernel-features.h (__ASSUME_UTIMES): Do not define. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Undefine if [__LINUX_KERNEL_VERSION < 0x020621] instead of defining if [__LINUX_KERNEL_VERSION >= 0x020621]. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. [__LINUX_KERNEL_VERSION < 0x020621] (__ASSUME_DUP3): Undefine. * sysdeps/unix/sysv/linux/arm/kernel-features.h (__ASSUME_UTIMES): Do not define. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. * sysdeps/unix/sysv/linux/hppa/kernel-features.h (__ASSUME_32BITUIDS): Likewise. (__ASSUME_TRUNCATE64_SYSCALL): Likewise. (__ASSUME_IPC64): Likewise. (__ASSUME_ST_INO_64_BIT): Likewise. (__ASSUME_GETDENTS64_SYSCALL): Likewise. [__LINUX_KERNEL_VERSION < 0x030e00] (__ASSUME_UTIMES): Undefine. * sysdeps/unix/sysv/linux/ia64/kernel-features.h (__ASSUME_UTIMES): Do not define. (__ASSUME_PSELECT): Likewise. (__ASSUME_PPOLL): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/m68k/kernel-features.h (__ASSUME_UTIMES): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/microblaze/kernel-features.h (__ASSUME_UTIMES): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/mips/kernel-features.h (__ASSUME_IPC64): Likewise. (__ASSUME_UTIMES): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. * sysdeps/unix/sysv/linux/tile/kernel-features.h (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. (__ASSUME_UTIMES): Undefine.
2014-05-14Clean up ARM old-ABI symbol versioning relics.Joseph Myers
This patch cleans up some symbol versioning code in the ARM port that exists only as relics of the old-ABI port, which was removed some time ago. The minimum symbol version in the ARM port is GLIBC_2.4 (the version where the EABI port was introduced). Thus, any SHLIB_COMPAT conditionals where the later version is 2.4 or later are obsolete and can be removed. In addition, there is no need to set symbol versions before 2.4 explicitly if the symbols would have a version of 2.4 by default anyway. This includes most of the entries in sysdeps/unix/sysv/linux/arm/Versions: those for GLIBC_2.0 are for libgcc unwind functions that aren't actually in ARM EABI glibc at all, while those for GLIBC_2.2 and GLIBC_2.3.3 are for functions which for the old-ABI port may have had versions different from the architecture-independent default, but where for EABI the default suffices (both the default and the version in that file map to 2.4, so the entries in that file do nothing). The GLIBC_2.1 entries are needed (architecture-specific functions), but it seems less confusing for those to say GLIBC_2.4, as the actual version those symbols in fact have. Various cases in the <fenv.h> functions where a function is defined as __fe* with an fe* versioned alias are cleaned up just to define fe* directly, as done e.g. on AArch64. If in future we actually need an __fe* name for use from C90 functions in libm as discussed recently, of course we can add one on all architectures and make the fe* name into a weak alias for that particular function, but for now the __fe* names aren't needed. In the case of posix_fadvise64, the __posix_fadvise64_l64 name and posix_fadvise64 alias are kept as __posix_fadvise64_l64 is used in posix_fadvise. (For that to be a namespace-clean use, posix_fadvise64 needs to be a *weak* alias not a strong one as at present, but that's an independent preexisting bug.) (There remain references to GLIBC_2_2 in sysdeps/unix/sysv/linux/arm/{msgctl.c,semctl.c,shmctl.c}. As those files are used by alpha which has a genuine 2.2 version for those functions, I think those references need to stay as-is.) Tested that the disassembly of installed shared libraries is unchanged by this patch (though function names shown in disassembly change to no longer have @@GLIBC_2.4, now those functions get versioned only by the version map and not redundantly at assembler time) and that the ABI tests pass. * sysdeps/arm/fclrexcpt.c (__feclearexcept): Rename to feclearexcept. Remove symbol versioning code. * sysdeps/arm/fegetenv.c (__fegetenv): Rename to fegetenv. Remove symbol versioning code. * sysdeps/arm/fesetenv.c (__fesetenv): Rename to fesetenv. Remove symbol versioning code. * sysdeps/arm/feupdateenv.c (__feupdateenv): Rename to feupdateenv. Remove symbol versioning code. * sysdeps/arm/fgetexcptflg.c (__fegetexceptflag): Rename to fegetexceptflag. Remove symbol versioning code. * sysdeps/arm/fsetexcptflg.c (__fesetexceptflag): Rename to fesetexceptflag. Remove symbol versioning code. * sysdeps/unix/sysv/linux/arm/Versions (libc): Remove GLIBC_2.0, GLIBC_2.2 and GLIBC_2.3.3 entries. Change GLIBC_2.1 to GLIBC_2.4. * sysdeps/unix/sysv/linux/arm/posix_fadvise64.c (__posix_fadvise64_l32): Remove prototype. [SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3)]: Remove conditional code.
2014-05-13Move NPTL public ABI headers for ARM to sysdeps/arm/nptl/.Roland McGrath
2014-05-13Verbatim NPTL file moves for ARM/Linux.Roland McGrath
2014-05-13Consolidate NPTL configury for ARM/Linux.Roland McGrath
2014-05-13Consolidate NPTL vs non clone.S for ARM.Roland McGrath
2014-05-13Clean up __exit_thread.Roland McGrath
2014-05-13Fix typo in assertionAndreas Schwab
2014-05-12Clean up kernel version conditionals for pre-2.6.32 kernels.Joseph Myers
This patch does some initial cleanup, following the move to 2.6.32 minimum kernel version, by removing __LINUX_KERNEL_VERSION conditionals that are now always-true or always-false. In the case of __ASSUME_ARG_MAX_STACK_BASED, where the conditional used a kernel version that was itself in a macro, the associated sysconf.c code is also cleaned up and __ASSUME_ARG_MAX_STACK_BASED removed completely. Tested x86_64 that disassembly of installed shared libraries is unchanged by the patch. * sysdeps/unix/sysv/linux/kernel-features.h [__s390__] (__ASSUME_UTIMES): Do not condition on kernel version. (__ASSUME_PSELECT): Define unconditionally. (__ASSUME_PPOLL): Likewise. (__ASSUME_ATFCTS): Likewise. (__ASSUME_SET_ROBUST_LIST): Do not condition on kernel version. (__ASSUME_COMPLETE_READV_WRITEV): Define unconditionally. (__ASSUME_FUTEX_LOCK_PI): Do not condition on kernel version. (__ASSUME_UTIMENSAT): Define unconditionally. (__ASSUME_PRIVATE_FUTEX): Likewise. (__ASSUME_FALLOCATE): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__LINUX_ARG_MAX_STACK_BASED_MIN_KERNEL): Remove. (__ASSUME_ARG_MAX_STACK_BASED): Likewise. (__ASSUME_ADJ_OFFSET_SS_READ): Define unconditionally. (__ASSUME_SOCK_CLOEXEC): Do not condition on kernel version. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. [__x86_64__ || __sparc__] (__ASSUME_ACCEPT4_SYSCALL): Likewise. (__ASSUME_FUTEX_CLOCK_REALTIME): Define unconditionally. (__ASSUME_AT_RANDOM): Likewise. (__ASSUME_PREADV): Likewise. (__ASSUME_PWRITEV): Likewise. (__ASSUME_REQUEUE_PI): Do not condition on kernel version. (__ASSUME_F_GETOWN_EX): Define unconditionally. (__ASSUME_XFS_RESTRICTED_CHOWN): Likewise. * sysdeps/unix/sysv/linux/sysconf.c (__sysconf) [!__ASSUME_ARG_MAX_STACK_BASED]: Remove conditional code. * sysdeps/unix/sysv/linux/alpha/kernel-features.h (__ASSUME_O_CLOEXEC): Define unconditionally. (__ASSUME_PSELECT): Do not undefine conditionally. (__ASSUME_PPOLL): Likewise. (__ASSUME_ATFCTS): Likewise. (__ASSUME_SET_ROBUST_LIST): Likewise. (__ASSUME_UTIMENSAT): Likewise. (__ASSUME_FDATASYNC): Define unconditionally. * sysdeps/unix/sysv/linux/arm/kernel-features.h (__ASSUME_SIGFRAME_V2): Likewise. )__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_PSELECT): Do not undefine conditionally. (__ASSUME_PPOLL): Likewise. * sysdeps/unix/sysv/linux/ia64/kernel-features.h (__ASSUME_PSELECT): Define unconditionally. (__ASSUME_PPOLL): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/m68k/kernel-features.h (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/mips/kernel-features.h (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_ACCEPT4_SYSCALL): Likewise.
2014-05-08Some configure-related decrufting.Roland McGrath
2014-05-06Move ARM internal unwind.h header to the right sysdeps directory.Roland McGrath
2014-05-07SPARC: add EFD_SEMAPHORE in <bits/eventfd.h> (BZ #16916)Aurelien Jarno
EFD_SEMAPHORE has been added in the main <bits/eventfd.h>, but not in the SPARC specific version. Fix that.
2014-05-05Move rules for Linux-specific pldd program to Linux-specific Makefile.Roland McGrath
2014-05-01ARM: Remove lowlevellock.cWill Newton
lowlevellock.c for arm differs from the generic lowlevellock.c only in insignificant ways, so can be removed. Happily, this fixes BZ 15119 (unnecessary busy loop in __lll_timedlock_wait on arm). The notable differences between the arm and generic implementations are: 1) arm __lll_timedlock_wait has a fast path out if futex has been set to 0 between since the function was called. This seems unlikely to happen very often, so it seems at worst harmless to lose this fast path. 2) Some function in arm's lowlevellock.c set futex to 2 if it was 1. The generic version always sets the futex to 2. As futex can only be 0, 1 or 2 on entry into these functions, the behaviour is equivalent. (If the futex manages to be 0 on entry then we've just lost another unlikely fast path out.) There are no test suite regressions. Note that hppa and sparc also have their own lowlevellock.c. I believe hppa can also be removed, so I'll send a separate patch for that shortly. sparc's seems to be genuinely needed as it uses a different locking structure. Also note that the analysis at https://sourceware.org/ml/libc-ports/2013-02/msg00021.html indicates a further locking performance bug to fix - I've got a partial patch for that which I can submit once I've finished testing. 2014-05-01 Bernard Ogden <bernie.ogden@linaro.org> [BZ #15119] * sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c: Remove file.
2014-04-30Correct sparc CPP guards for EMT_TAGOVF.David S. Miller
* sysdeps/unix/sysv/linux/sparc/bits/siginfo.h (EMT_TAGOVF): Protect with __USE_GNU instead of XOPEN cpp guards.
2014-04-30Fix some sparc conform test failures in siginfo.hDavid S. Miller
* sysdeps/unix/sysv/linux/sparc/bits/siginfo.h (EMT_TAGOVF): Protect with XOPEN cpp guards.
2014-04-30Increase minimum Linux kernel version to 2.6.32.Joseph Myers
This patch increases the minimum Linux kernel version for glibc to 2.6.32, as discussed in the thread starting at <https://sourceware.org/ml/libc-alpha/2014-01/msg00511.html>. This patch just does the minimal change to arch_minimum_kernel settings (and LIBC_LINUX_VERSION, which determines the minimum kernel headers version, as it doesn't make sense for that to be older than the minimum kernel that can be used at runtime). Followups would be expected to do, roughly and not necessarily precisely in this order: * Remove __LINUX_KERNEL_VERSION checks in kernel-features.h files where those checks are always true / always false for kernels 2.6.32 and above. * Otherwise simplify/improve conditionals in those files (for example, where defining once in the main file then undefining in architecture-specific files makes things clearer than having lots of separate definitions of the same macro), possibly fixing in the process cases where a macro should optimally have been defined for a given architecture but wasn't. (In the review in preparation for this version increase I checked what the right conditions should be for all macros in the main kernel-features.h whose definitions there would have been affected by the increase - but I only fixed that subset of the issues found where --enable-kernel=2.6.32 would have caused a kernel feature to be wrongly assumed to be present, not any cases where a feature is not assumed but could be assumed.) * Remove conditionals on __ASSUME_* where they can now be taken to be always-true, and the definitions when the macros are only used in Linux-specific files. * Split more architectures out of the main kernel-features.h (like ex-ports architectures), once various of the architecture conditionals there have been eliminated so the new architecture-specific files are no larger than actually necessary. Tested x86_64. 2014-03-27 Joseph Myers <joseph@codesourcery.com> [BZ #9894] * sysdeps/unix/sysv/linux/configure.ac (LIBC_LINUX_VERSION): Change to 2.6.32. (arch_minimum_kernel): Change all 2.6.16 settings to 2.6.32. * sysdeps/unix/sysv/linux/configure: Regenerated. * sysdeps/unix/sysv/linux/microblaze/configure.ac: Remove file. * sysdeps/unix/sysv/linux/microblaze/configure: Likewise. * sysdeps/unix/sysv/linux/tile/configure.ac: Likewise. * sysdeps/unix/sysv/linux/tile/configure: Likewise. * README: Update reference to required Linux kernel version. * manual/install.texi (Linux): Update reference to required Linux kernel headers version. * INSTALL: Regenerated.
2014-04-29Relocate hppa from ports to libc.Carlos O'Donell
2014-04-22Fix sigaction conform test failures on sparc.David S. Miller
* sysdeps/unix/sysv/linux/sparc/bits/sigaction.h (struct sigaction): New struct member __glibc_reserved0, change type of sa_flags to int.
2014-04-17aarch64: Re-implement setcontext without rt_sigreturn syscallWill Newton
The current implementation of setcontext uses rt_sigreturn to restore the contents of registers. This contrasts with the way most other architectures implement setcontext: powerpc64, mips, tile: Call rt_sigreturn if context was created by a call to a signal handler, otherwise restore in user code. powerpc32: Call swapcontext system call and don't call sigreturn or rt_sigreturn. x86_64, sparc, hppa, sh, ia64, m68k, s390, arm: Only support restoring "synchronous" contexts, that is contexts created by getcontext, and restoring in user code and don't call sigreturn or rt_sigreturn. alpha: Call sigreturn (but not rt_sigreturn) in all cases to do the restore. The text of the setcontext manpage suggests that the requirement to be able to restore a signal handler created context has been dropped from SUSv2: If the context was obtained by a call to a signal handler, then old standard text says that "program execution continues with the program instruction following the instruction interrupted by the signal". However, this sentence was removed in SUSv2, and the present verdict is "the result is unspecified". Implementing setcontext by calling rt_sigreturn unconditionally causes problems when used with sigaltstack as in BZ #16629. On this basis it seems that aarch64 is broken and that new ports should only support restoring contexts created with getcontext and do not need to call rt_sigreturn at all. This patch re-implements the aarch64 setcontext function to restore the context in user code in a similar manner to x86_64 and other ports. ChangeLog: 2014-04-17 Will Newton <will.newton@linaro.org> [BZ #16629] * sysdeps/unix/sysv/linux/aarch64/setcontext.S (__setcontext): Re-implement to restore registers in user code and avoid rt_sigreturn system call.
2014-04-16alpha: Remove alpha-linux pthread_once.cRichard Henderson
2014-04-16alpha: Fix __pointer_chk_guard definition for the testsuiteRichard Henderson
2014-04-11Fixed and unified pthread_once.Torvald Riegel
[BZ #15215] This unifies various pthread_once architecture-specific implementations which were using the same algorithm with slightly different implementations. It also adds missing memory barriers that are required for correctness.
2014-04-09Move __PTHREAD_SPINS definition to architecture specific headerAdhemerval Zanella
This patch moves the __PTHREAD_SPINS definition to arch specific header since pthread_mutex_t layout is also arch specific. This leads to no need to defining __PTHREAD_MUTEX_HAVE_ELISION and thus removing of the undefined compiler warning.
2014-04-06PowerPC: define _CALL_ELF if compiler does notAdhemerval Zanella
This patch makes the configure adds -D_CALL_ELF=1 when compiler does not define _CALL_ELF (versions before powerpc64le support). It cleans up compiler warnings on old compiler where _CALL_ELF is not defined on powerpc64(be) builds. It does by add a new config.make variable for configure-deduced CPPFLAGS and accumulate into that (confix-extra-cppflags). It also generalizes libc_extra_cflags so it accumulates in sysdeps configure fragmenets.
2014-03-31Correct robust mutex / PI futex kernel assumptions (bug 9894).Joseph Myers
This patch continues fixing __ASSUME_* issues in preparation for moving to a 2.6.32 minimum kernel version by addressing assumptions on robust mutex and PI futex support availability. Those assumptions are bug 9894, but to be clear this patch does not address all the issues from that bug about wrong version assumptions, only those still applicable for --enable-kernel=2.6.32 or later (with the expectation that the move to that minimum kernel will obsolete the other parts of the bug). The patch is independent of <https://sourceware.org/ml/libc-alpha/2014-03/msg00585.html>, my other pending-review patch preparing for the kernel version change; the two together complete all the changes I believe are needed in preparation regarding any macro in sysdeps/unix/sysv/linux/kernel-features.h that would be affected by such a change. (I have not checked the correctness of macros whose conditions are unaffected by such a change, or macros only defined in other kernel-features.h files.) As discussed in that bug, robust mutexes and PI futexes need futex_atomic_cmpxchg_inatomic to be implemented, in addition to certain syscalls needed for robust mutexes (and architecture-independent kernel pieces for all the features in question). That is, as I understand it, they need futex_atomic_cmpxchg_inatomic to *work* (not return an ENOSYS error). The issues identified in my analysis relate to ARM, M68K, MicroBlaze, MIPS and SPARC. On ARM, whether futex_atomic_cmpxchg_inatomic works depends on the kernel configuration. As of 3.13, the condition for *not* working is CONFIG_CPU_USE_DOMAINS && CONFIG_SMP. As of 2.6.32 it was simply CONFIG_SMP that meant the feature was not implemented. I don't know if there are any circumstances in which we can say "we can assume a userspace glibc binary built with these options will never run on a kernel with the problematic configuration", but at least for now I'm just undefining the relevant __ASSUME_* macros for ARM. On M68K, two of the three macros are undefined for kernels before 3.10, but as far as I can see __ASSUME_FUTEX_LOCK_PI is in the same group needing futex_atomic_cmpxchg_inatomic support and so should be undefined as well. On MicroBlaze the required support was added in 2.6.33. On MIPS, the support depends on cpu_has_llsc in the kernel - that is, actual hardware LL/SC support (GCC and glibc for MIPS GNU/Linux rely on the instructions being supported in some way, but it may be kernel emulation; futex_atomic_cmpxchg_inatomic doesn't work with that emulation). The same condition as in GCC for indicating LL/SC support may not be available is used for undefining the macros in glibc, __mips == 1 || defined _MIPS_ARCH_R5900. (Maybe we could in fact desupport MIPS processors without the hardware support in glibc.) On SPARC, 32-bit kernels don't support futex_atomic_cmpxchg_inatomic; __arch64__ || __sparc_v9__ is used as the condition for binaries that won't run on 32-bit kernels. This patch is not tested beyond the sanity check of an x86_64 build. [BZ #9894] * sysdeps/unix/sysv/linux/kernel-features.h [__sparc__ && !__arch64__ && !__sparc_v9__] (__ASSUME_SET_ROBUST_LIST): Do not define. [__sparc__ && !__arch64__ && !__sparc_v9__] (__ASSUME_FUTEX_LOCK_PI): Likewise. [__sparc__ && !__arch64__ && !__sparc_v9__] (__ASSUME_REQUEUE_PI): Likewise. * sysdeps/unix/sysv/linux/arm/kernel-features.h (__ASSUME_FUTEX_LOCK_PI): Undefine. (__ASSUME_REQUEUE_PI): Likewise. (__ASSUME_SET_ROBUST_LIST): Likewise. * sysdeps/unix/sysv/linux/m68k/kernel-features.h [__LINUX_KERNEL_VERSION < 0x030a00] (__ASSUME_FUTEX_LOCK_PI): Undefine. * sysdeps/unix/sysv/linux/microblaze/kernel-features.h [__LINUX_KERNEL_VERSION < 0x020621] (__ASSUME_FUTEX_LOCK_PI): Likewise. [__LINUX_KERNEL_VERSION < 0x020621] (__ASSUME_REQUEUE_PI): Likewise. [__LINUX_KERNEL_VERSION < 0x020621] (__ASSUME_SET_ROBUST_LIST): Likewise. * sysdeps/unix/sysv/linux/mips/kernel-features.h [__mips == 1 || _MIPS_ARCH_R5900] (__ASSUME_FUTEX_LOCK_PI): Undefine. [__mips == 1 || _MIPS_ARCH_R5900] (__ASSUME_REQUEUE_PI): Likewise. [__mips == 1 || _MIPS_ARCH_R5900] (__ASSUME_SET_ROBUST_LIST): Likewise.
2014-03-31Fix futimesat for older MicroBlaze kernels (bug 16648).Joseph Myers
Continuing the fixes for __ASSUME_* issues in preparation for moving to a 2.6.32 minimum kernel version, this *untested* patch fixes bug 16648, the definition of __ASSUME_ATFCTS meaning that the futimesat syscall is assumed for all MicroBlaze kernels despite not being present until 2.6.33. __ASSUME_ATFCTS controls conditionals relating to a lot of different syscalls in Linux-specific code (fstatat64 faccessat fchmodat fchownat futimesat newfstatat linkat mkdirat openat readlinkat renameat symlinkat unlinkat mknodat), where whether newfstatat fstatat64 futimesat are used depends on the architecture, as well as controlling whether openat64_not_cancel_3 is expected to work in sysdeps/posix/getcwd.c. The assumptions are all OK as of 2.6.32 except for this MicroBlaze case, and it's generally desirable to get rid of as many of the __ASSUME_ATFCTS conditionals as possible, to simplify the code (the fallbacks include potential unbounded dynamic stack allocations). Thus, rather than the simplest approach of undefining __ASSUME_ATFCTS for older kernels on MicroBlaze, this patch takes the approach of using the linux-generic implementation of futimesat for MicroBlaze kernels before 2.6.33 (all such kernels have the utimensat syscall). [BZ #16648] * sysdeps/unix/sysv/linux/microblaze/kernel-features.h [__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_FUTIMESAT): Define. * sysdeps/unix/sysv/linux/microblaze/futimesat.c: New file.
2014-03-25Fix use of uninitialized variableAndreas Schwab
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