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2016-12-28Refactor Linux ipc_priv headerAdhemerval Zanella
Some architectures support the old-style IPC and require IPC_64 equal to 0x100 to be passed along SysV IPC syscalls, while new architectures should default to new IPC version (without the flags being set). This patch refactor current ipc_priv.h Linux headers in two directions: - Remove cross platform references (for instance alpha including powerpc definition) and add required definition for each required port. The idea is to avoid tie one architecture definition with another and make platform change independent. - Move all common definitions (the ipc syscall commands) on a common header, ipc_ops.h. * sysdeps/unix/sysv/linux/aarch64/ipc_priv.h: New file. * sysdeps/unix/sysv/linux/alpha/ipc_priv.h: Avoid included other arch definition and define its own. * sysdeps/unix/sysv/linux/ipc_ops.h: New file. * sysdeps/unix/sysv/linux/x86_64/ipc_priv.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/ipc_priv.h: Likewise. * sysdeps/unix/sysv/linux/mips/ipc_priv.h: Remove file. * sysdeps/unix/sysv/linux/mips/mips64/ipc_priv.h: New file. * sysdeps/unix/sysv/linux/ipc_priv.h: Move ipc syscall operation definitions to common header. * sysdeps/unix/sysv/linux/powerpc/ipc_priv.h: Use common syscall operation from ipc_ops.h.
2016-12-28Add __ASSUME_DIRECT_SYSVIPC_SYSCALL for LinuxAdhemerval Zanella
On current minimum supported kernels, the SysV IPC on Linux is provided by either the ipc syscalls or correspondent wire syscalls. Also, for architectures that supports wire syscalls all syscalls are supported in a set (msgct, msgrcv, msgsnd, msgget, semctl, semget, semop, semtimedop, shmctl, shmat, shmget, shmdt). The architectures that only supports ipc syscall are: - i386, m68k, microblaze, mips32, powerpc (powerpc32, powerpc64, and powerpc64le), s390 (32 and 64 bits), sh, sparc32, and sparc64. And the architectures that only supports wired syscalls are: - aarch64, alpha, hppa, ia64, mips64, mips64n32, nios2, tile (tilepro, tilegx, and tilegx64), and x86_64 Also arm is the only one that supports both wire syscalls and the ipc, although the ipc one is deprecated. This patch adds a new define, __ASSUME_DIRECT_SYSVIPC_SYSCALL, that wired syscalls are supported on the system and the general idea is to use it where possible. I also checked the syscall table for all architectures on Linux 4.9 and there is no change on described support for Linux 2.6.32/3.2. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): New define. * sysdeps/unix/sysv/linux/i386/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Undef. * sysdeps/unix/sysv/linux/m68k/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/mips/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/powerpc/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/s390/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/sh/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/sparc/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
2016-12-26Do not stack-protect sigreturn stubs [BZ #7065]Nick Alcock
These are called from the kernel with the stack at a carefully- chosen location so that the stack frame can be restored: they must not move the stack pointer lest garbage be restored into the registers. We explicitly inhibit protection for SPARC and for signal/sigreturn.c: other arches either define their sigreturn stubs in .S files, or (i386, x86_64, mips) use macros expanding to top-level asm blocks and explicit labels in the text section to mock up a "function" without telling the compiler that one is there at all.
2016-12-26Do not stack-protect ifunc resolvers [BZ #7065]Nick Alcock
When dynamically linking, ifunc resolvers are called before TLS is initialized, so they cannot be safely stack-protected. We avoid disabling stack-protection on large numbers of files by using __attribute__ ((__optimize__ ("-fno-stack-protector"))) to turn it off just for the resolvers themselves. (We provide the attribute even when statically linking, because we will later use it elsewhere too.)
2016-12-21This patch cleans up the strsep implementation and improves performance.Wilco Dijkstra
Currently strsep calls strpbrk is is now a veneer to strcspn. Calling strcspn directly is faster. Since it handles a delimiter string of size 1 as a special case, this is not needed in strsep itself. Although this means there is a slightly higher overhead if the delimiter size is 1, all other cases are slightly faster. The overall performance gain is 5-10% on AArch64. The string/bits/string2.h header contains optimizations for constant delimiters of size 1-3. Benchmarking these showed similar performance for size 1 (since in all cases strchr/strchrnul is used), while size 2 and 3 can give up to 2x speedup for small input strings. However if these cases are common it seems much better to add this optimization to strcspn. So move these header optimizations to string-inlines.c. Improve the strsep benchmark so that it actually benchmarks something. The current version contains a delimiter character at every position in the input string, so there is very little work to do, and the extremely inefficent simple_strsep implementation appears fastest in every case. The new version has either no match in the input for the fail case and a match halfway in the input for the success case. The input is then restored so that each iteration does exactly the same amount of work. Reduce the number of testcases since simple_strsep takes a lot of time now. * benchtests/bench-strsep.c (oldstrsep): Add old implementation. (do_one_test) Restore original string so iteration works. * string/string-inlines.c (do_test): Create better input strings. (test_main) Reduce number of testruns. * string/string-inlines.c (__old_strsep_1c): New function. (__old_strsep_2c): Likewise. (__old_strsep_3c): Likewise. * string/strsep.c (__strsep): Remove case of small delim string. Call strcspn directly rather than strpbrk. * string/bits/string2.h (__strsep): Remove define. (__strsep_1c): Remove. (__strsep_2c): Remove. (__strsep_3c): Remove. (strsep): Remove. * sysdeps/unix/sysv/linux/internal_statvfs.c (__statvfs_getflags): Rename to __strsep.
2016-12-21Add roundeven, roundevenf, roundevenl.Joseph Myers
TS 18661-1 defines roundeven functions that round a floating-point number to the nearest integer, in that floating-point type, with ties rounding to even (whereas the round functions round ties away from zero). As with other such functions, they raise no exceptions apart from "invalid" for signaling NaNs. There was a previous user request for this functionality in glibc in <https://sourceware.org/ml/libc-help/2015-02/msg00005.html>. This patch implements these functions for glibc. The implementations use integer bit-manipulation (or roundeven on the high and low parts, in the IBM long double case). It's possible that there may be faster approaches on some architectures (in particular, on AArch64 the frintn instruction should do exactly what's required); I'll leave it to architecture maintainers or others interested to implement such architecture-specific versions if desired. (Where architectures have instructions to round to nearest integer in the current rounding mode, implementations saving and restoring the rounding mode - and dealing with exceptions if those instructions generate "inexact" - are also possible, though their performance depends on the cost of manipulating exceptions / rounding mode state.) Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (roundeven): New declaration. * math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (roundeven): New macro. * math/Versions (roundeven): New libm symbol at version GLIBC_2.25. (roundevenf): Likewise. (roundevenl): Likewise. * math/Makefile (libm-calls): Add s_roundevenF. * math/libm-test.inc (roundeven_test_data): New array. (roundeven_test): New function. (main): Call roundeven_test. * math/test-tgmath.c (NCALLS): Increase to 134. (F(compile_test)): Call roundeven. (F(roundeven)): New function. * manual/arith.texi (Rounding Functions): Document roundeven, roundevenf and roundevenl. * manual/libm-err-tab.pl (@all_functions): Add roundeven. * include/math.h (roundeven): Use libm_hidden_proto. * sysdeps/ieee754/dbl-64/s_roundeven.c: New file. * sysdeps/ieee754/dbl-64/wordsize-64/s_roundeven.c: Likewise. * sysdeps/ieee754/flt-32/s_roundevenf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_roundevenl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_roundevenl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_roundevenl.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add roundeven. (CFLAGS-nldbl-roundeven.c): New variable. * sysdeps/ieee754/ldbl-opt/nldbl-roundeven.c: New file. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-12-20S390: Optimize lock-elision by decrementing adapt_count at unlock.Stefan Liebler
This patch decrements the adapt_count while unlocking the futex instead of before aquiring the futex as it is done on power, too. Furthermore a transaction is only started if the futex is currently free. This check is done after starting the transaction, too. If the futex is not free and the transaction nesting depth is one, we can simply end the started transaction instead of aborting it. The implementation of this check was faulty as it always ended the started transaction. By using the fallback path, the the outermost transaction was aborted. Now the outermost transaction is aborted directly. This patch also adds some commentary and aligns the code in elision-trylock.c to the code in elision-lock.c as possible. ChangeLog: * sysdeps/unix/sysv/linux/s390/lowlevellock.h (__lll_unlock_elision, lll_unlock_elision): Add adapt_count argument. * sysdeps/unix/sysv/linux/s390/elision-lock.c: (__lll_lock_elision): Decrement adapt_count while unlocking instead of before locking. * sysdeps/unix/sysv/linux/s390/elision-trylock.c (__lll_trylock_elision): Likewise. * sysdeps/unix/sysv/linux/s390/elision-unlock.c: (__lll_unlock_elision): Likewise.
2016-12-20S390: Use new __libc_tbegin_retry macro in elision-lock.c.Stefan Liebler
This patch implements __libc_tbegin_retry macro which is equivalent to gcc builtin __builtin_tbegin_retry, except the changes which were applied to __libc_tbegin in the previous patch. If tbegin aborts with _HTM_TBEGIN_TRANSIENT. Then this macros restores the fpc, fprs and automatically retries up to retry_cnt tbegins. Further saving of the state is omitted as it is already saved in the first round. Before retrying a further transaction, the transaction-abort-assist instruction is used to support the cpu. This macro is now used in function __lll_lock_elision. ChangeLog: * sysdeps/unix/sysv/linux/s390/htm.h(__libc_tbegin_retry): New macro. * sysdeps/unix/sysv/linux/s390/elision-lock.c (__lll_lock_elision): Use __libc_tbegin_retry macro.
2016-12-20S390: Use own tbegin macro instead of __builtin_tbegin.Stefan Liebler
This patch defines __libc_tbegin, __libc_tend, __libc_tabort and __libc_tx_nesting_depth in htm.h which replaces the direct usage of equivalent gcc builtins. We have to use an own inline assembly instead of __builtin_tbegin, as tbegin has to filter program interruptions which can't be done with the builtin. Before this change, e.g. a segmentation fault within a transaction, leads to a coredump where the instruction pointer points behind the tbegin instruction instead of real failing one. Now the transaction aborts and the code should be reexecuted by the fallback path without transactions. The segmentation fault will produce a coredump with the real failing instruction. The fpc is not saved before starting the transaction. If e.g. the rounging mode is changed and the transaction is aborting afterwards, the builtin will not restore the fpc. This is now done with the __libc_tbegin macro. Now the call saved fprs have to be saved / restored in the __libc_tbegin macro. Using the gcc builtin had forced the saving / restoring of fprs at begin / end of e.g. __lll_lock_elision function. The new macro saves these fprs before tbegin instruction and only restores them on a transaction abort. Restoring is not needed on a successfully started transaction. The used inline assembly does not clobber the fprs / vrs! Clobbering the latter ones would force the compiler to save / restore the call saved fprs as those overlap with the vrs, but they only need to be restored if the transaction fails. Thus the user of the tbegin macros has to compile the file / function with -msoft-float. It prevents gcc from using fprs / vrs. ChangeLog: * sysdeps/unix/sysv/linux/s390/Makefile (elision-CFLAGS): Add -msoft-float. * sysdeps/unix/sysv/linux/s390/htm.h: New File. * sysdeps/unix/sysv/linux/s390/elision-lock.c: Use __libc_t* transaction macros instead of __builtin_t*. * sysdeps/unix/sysv/linux/s390/elision-trylock.c: Likewise. * sysdeps/unix/sysv/linux/s390/elision-unlock.c: Likewise.
2016-12-20S390: Use C11-like atomics instead of plain memory accesses in lock elision ↵Stefan Liebler
code. This uses atomic operations to access lock elision metadata that is accessed concurrently (ie, adapt_count fields). The size of the data is less than a word but accessed only with atomic loads and stores. See also x86 commit ca6e601a9d4a72b3699cca15bad12ac1716bf49a: "Use C11-like atomics instead of plain memory accesses in x86 lock elision." ChangeLog: * sysdeps/unix/sysv/linux/s390/elision-lock.c (__lll_lock_elision): Use atomics to load / store adapt_count. * sysdeps/unix/sysv/linux/s390/elision-trylock.c (__lll_trylock_elision): Likewise.
2016-12-20Add fmaxmag, fminmag functions.Joseph Myers
TS 18661-1 defines fmaxmag and fminmag functions that return the argument with maximum / minimum magnitude (acting like fmax / fmin if the arguments have the same magnitude or either argument is a NaN). These correspond to the IEEE 754-2008 operations maxNumMag and minNumMag. This patch implements these functions for glibc. They are implemented with type-generic templates. Tests are based on those for fmax and fmin. Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (fmaxmag): New declaration. (fminmag): Likewise. * math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (fmaxmag): New macro. [__GLIBC_USE (IEC_60559_BFP_EXT)] (fminmag): Likewise. * math/Versions (fmaxmag): New libm symbol at version GLIBC_2.25. (fmaxmagf): Likewise. (fmaxmagl): Likewise. (fminmag): Likewise. (fminmagf): Likewise. (fminmagl): Likewise. * math/Makefile (gen-libm-calls): Add s_fmaxmagF and s_fminmagF. * math/s_fmaxmag_template.c: New file. * math/s_fminmag_template.c: Likewise. * math/libm-test.inc (fmaxmag_test_data): New array. (fmaxmag_test): New function. (fminmag_test_data): New array. (fminmag_test): New function. (main): Call fmaxmag_test and fminmag_test. * math/test-tgmath.c (NCALLS): Increase to 132. (F(compile_test)): Call fmaxmag and fminmag. (F(fminmag)): New function. (F(fmaxmag)): Likewise. * manual/arith.texi (Misc FP Arithmetic): Document fminmag, fminmagf, fminmagl, fmaxmag, fmaxmagf and fmaxmagl. * manual/libm-err-tab.pl (@all_functions): Add fmaxmag and fminmag. * sysdeps/ieee754/ldbl-opt/nldbl-fmaxmag.c: New file. * sysdeps/ieee754/ldbl-opt/nldbl-fminmag.c: Likewise. * sysdeps/ieee754/ldbl-opt/s_fmaxmagl.c: Likewise. * sysdeps/ieee754/ldbl-opt/s_fminmagl.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add fmaxmag and fminmag. (CFLAGS-nldbl-fmaxmag.c): New variable. (CFLAGS-nldbl-fminmag.c): Likewise. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-12-16New string function explicit_bzero (from OpenBSD).Zack Weinberg
explicit_bzero(s, n) is the same as memset(s, 0, n), except that the compiler is not allowed to delete a call to explicit_bzero even if the memory pointed to by 's' is dead after the call. Right now, this effect is achieved externally by having explicit_bzero be a function whose semantics are unknown to the compiler, and internally, with a no-op asm statement that clobbers memory. This does mean that small explicit_bzero operations cannot be expanded inline as small memset operations can, but on the other hand, small memset operations do get deleted by the compiler. Hopefully full compiler support for explicit_bzero will happen relatively soon. There are two new tests: test-explicit_bzero.c verifies the visible semantics in the same way as the existing test-bzero.c, and tst-xbzero-opt.c verifies the not-being-optimized-out property. The latter is conceptually based on a test written by Matthew Dempsky for the OpenBSD regression suite. The crypt() implementation has an immediate use for this new feature. We avoid having to add a GLIBC_PRIVATE alias for explicit_bzero by running all of libcrypt's calls through the fortified variant, __explicit_bzero_chk, which is in the impl namespace anyway. Currently I'm not aware of anything in libc proper that needs this, but the glue is all in place if it does become necessary. The legacy DES implementation wasn't bothering to clear its buffers, so I added that, mostly for consistency's sake. * string/explicit_bzero.c: New routine. * string/test-explicit_bzero.c, string/tst-xbzero-opt.c: New tests. * string/Makefile (routines, strop-tests, tests): Add them. * string/test-memset.c: Add ifdeffage for testing explicit_bzero. * string/string.h [__USE_MISC]: Declare explicit_bzero. * debug/explicit_bzero_chk.c: New routine. * debug/Makefile (routines): Add it. * debug/tst-chk1.c: Test fortification of explicit_bzero. * string/bits/string3.h: Fortify explicit_bzero. * manual/string.texi: Document explicit_bzero. * NEWS: Mention addition of explicit_bzero. * crypt/crypt-entry.c (__crypt_r): Clear key-dependent intermediate data before returning, using explicit_bzero. * crypt/md5-crypt.c (__md5_crypt_r): Likewise. * crypt/sha256-crypt.c (__sha256_crypt_r): Likewise. * crypt/sha512-crypt.c (__sha512_crypt_r): Likewise. * include/string.h: Redirect internal uses of explicit_bzero to __explicit_bzero_chk[_internal]. * string/Versions [GLIBC_2.25]: Add explicit_bzero. * debug/Versions [GLIBC_2.25]: Add __explicit_bzero_chk. * sysdeps/arm/nacl/libc.abilist * sysdeps/unix/sysv/linux/aarch64/libc.abilist * sysdeps/unix/sysv/linux/alpha/libc.abilist * sysdeps/unix/sysv/linux/arm/libc.abilist * sysdeps/unix/sysv/linux/hppa/libc.abilist * sysdeps/unix/sysv/linux/i386/libc.abilist * sysdeps/unix/sysv/linux/ia64/libc.abilist * sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist * sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist * sysdeps/unix/sysv/linux/microblaze/libc.abilist * sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist * sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist * sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist * sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist * sysdeps/unix/sysv/linux/nios2/libc.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist * sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist * sysdeps/unix/sysv/linux/sh/libc.abilist * sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist * sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Add entries for explicit_bzero and __explicit_bzero_chk.
2016-12-14Refactor long double information into bits/long-double.h.Joseph Myers
Information about whether the ABI of long double is the same as that of double is split between bits/mathdef.h and bits/wordsize.h. When the ABIs are the same, bits/mathdef.h defines __NO_LONG_DOUBLE_MATH. In addition, in the case where the same glibc binary supports both -mlong-double-64 and -mlong-double-128, bits/wordsize.h defines __LONG_DOUBLE_MATH_OPTIONAL, along with __NO_LONG_DOUBLE_MATH if this particular compilation is with -mlong-double-64. As part of the refactoring I proposed in <https://sourceware.org/ml/libc-alpha/2016-11/msg00745.html>, this patch puts all that information in a single header, bits/long-double.h. It is included from sys/cdefs.h alongside the include of bits/wordsize.h, so other headers generally do not need to include bits/long-double.h directly. Previously, various bits/mathdef.h headers and bits/wordsize.h headers had this long double information (including implicitly in some bits/mathdef.h headers through not having the defines present in the default version). After the patch, it's all in six bits/long-double.h headers. Furthermore, most of those new headers are not architecture-specific. Architectures with optional long double all use the ldbl-opt sysdeps directory, either in the order (ldbl-64-128, ldbl-opt, ldbl-128) or (ldbl-128ibm, ldbl-opt). Thus a generic header for the case where long double = double, and headers in ldbl-128, ldbl-96 and ldbl-opt, suffices to cover every architecture except for cases where long double properties vary between different ABIs sharing a set of installed headers; fortunately all the ldbl-opt cases share a single compiler-predefined macro __LONG_DOUBLE_128__ that can be used to tell whether this compilation is -mlong-double-64 or -mlong-double-128. The two cases where a set of headers is shared between ABIs with different long double properties, MIPS (o32 has long double = double, other ABIs use ldbl-128) and SPARC (32-bit has optional long double, 64-bit has required long double), need their own bits/long-double.h headers. As with bits/wordsize.h, multiple-include protection for this header is generally implicit through the include guards on sys/cdefs.h, and multiple inclusion is harmless in any case. There is one subtlety: the header must not define __LONG_DOUBLE_MATH_OPTIONAL if __NO_LONG_DOUBLE_MATH was defined before its inclusion, because doing so breaks how sysdeps/ieee754/ldbl-opt/nldbl-compat.h defines __NO_LONG_DOUBLE_MATH itself before including system headers. Subject to keeping that working, it would be reasonable to move these macros from defined/undefined #ifdef to always-defined 1/0 #if semantics, but this patch does not attempt to do so, just rearranges where the macros are defined. After this patch, the only use of bits/mathdef.h is the alpha one for modifying complex function ABIs for old GCC. Thus, all versions of the header other than the default and alpha versions are removed, as is the include from math.h. Tested for x86_64 and x86. Also did compilation-only testing with build-many-glibcs.py. * bits/long-double.h: New file. * sysdeps/ieee754/ldbl-128/bits/long-double.h: Likewise. * sysdeps/ieee754/ldbl-96/bits/long-double.h: Likewise. * sysdeps/ieee754/ldbl-opt/bits/long-double.h: Likewise. * sysdeps/mips/bits/long-double.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/long-double.h: Likewise. * math/Makefile (headers): Add bits/long-double.h. * misc/sys/cdefs.h: Include <bits/long-double.h>. * stdlib/strtold.c: Include <bits/long-double.h> instead of <bits/wordsize.h>. * bits/mathdef.h [!_COMPLEX_H]: Do not allow inclusion. [!__NO_LONG_DOUBLE_MATH]: Remove conditional code. * math/math.h: Do not include <bits/mathdef.h>. * sysdeps/aarch64/bits/mathdef.h: Remove file. * sysdeps/alpha/bits/mathdef.h [!_COMPLEX_H]: Do not allow inclusion. * sysdeps/ia64/bits/mathdef.h: Remove file. * sysdeps/m68k/m680x0/bits/mathdef.h: Likewise. * sysdeps/mips/bits/mathdef.h: Likewise. * sysdeps/powerpc/bits/mathdef.h: Likewise. * sysdeps/s390/bits/mathdef.h: Likewise. * sysdeps/sparc/bits/mathdef.h: Likewise. * sysdeps/x86/bits/mathdef.h: Likewise. * sysdeps/s390/s390-32/bits/wordsize.h [!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]: Remove conditional code. * sysdeps/s390/s390-64/bits/wordsize.h [!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]: Likewise. * sysdeps/unix/sysv/linux/alpha/bits/wordsize.h [!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]: Likewise. * sysdeps/unix/sysv/linux/powerpc/bits/wordsize.h [!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/wordsize.h [!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]: Likewise.
2016-12-14Include <linux/falloc.h> in bits/fcntl-linux.h.Joseph Myers
This patch makes bits/fcntl-linux.h include <linux/falloc.h> to define the FALLOC_* flags under __USE_GNU (linux/falloc.h defines only those bits, nothing else). Tested for x86_64 and x86. * sysdeps/unix/sysv/linux/bits/fcntl-linux.h [__USE_GNU]: Include <linux/falloc.h>. (FALLOC_FL_KEEP_SIZE): Remove. (FALLOC_FL_PUNCH_HOLE): Likewise. (FALLOC_FL_COLLAPSE_RANGE): Likewise. (FALLOC_FL_ZERO_RANGE): Likewise.
2016-12-14Consolidate renameat Linux implementationAdhemerval Zanella
This patch consolidates the Linux renameat implementation on sysdeps/unix/sysv/linux/renameat.c. The renameat syscall was deprecated at b0da6d44 for newer architectures, so using the auto-generation list may generate wrappers that returns ENOSYS. Current code try to use __NR_renameat and if it is not define it uses __NR_renameat2. Checked on x86_64 and aarch64. * sysdeps/unix/sysv/linux/renameat.c: New file. * sysdeps/unix/sysv/linux/syscalls.list: Remove renameat.
2016-12-14Consolidate rename Linux implementationAdhemerval Zanella
This patch consolidates the Linux rename implementation on sysdeps/unix/sysv/linux/rename.c. Current code try to use __NR_rename if is defined and apply the same strategy for __NR_renameat and __NR_renameat2. Check on x86_64 and aarch64. * sysdeps/unix/sysv/linux/rename.c: New file. * sysdeps/unix/sysv/linux/generic/rename.c: Remove file.
2016-12-12Add getentropy, getrandom, <sys/random.h> [BZ #17252]Florian Weimer
2016-12-09support: Introduce new subdirectory for test infrastructureFlorian Weimer
The new test driver in <support/test-driver.c> has feature parity with the old one. The main difference is that its hooking mechanism is based on functions and function pointers instead of macros. This commit also implements a new environment variable, TEST_COREDUMPS, which disables the code which disables coredumps (that is, it enables them if the invocation environment has not disabled them). <test-skeleton.c> defines wrapper functions so that it is possible to use existing macros with the new-style hook functionality. This commit changes only a few test cases to the new test driver, to make sure that it works as expected.
2016-12-07Get rid of __elision_availableAndreas Schwab
2016-12-05Use C11-like atomics instead of plain memory accesses in x86 lock elision.Torvald Riegel
This uses atomic operations to access lock elision metadata that is accessed concurrently (ie, adapt_count fields). The size of the data is less than a word but accessed only with atomic loads and stores; therefore, we add support for shorter-size atomic load and stores too. * include/atomic.h (__atomic_check_size_ls): New. (atomic_load_relaxed, atomic_load_acquire, atomic_store_relaxed, atomic_store_release): Use it. * sysdeps/x86/elide.h (ACCESS_ONCE): Remove. (elision_adapt, ELIDE_LOCK): Use atomics. * sysdeps/unix/sysv/linux/x86/elision-lock.c (__lll_lock_elision): Use atomics and improve code comments. * sysdeps/unix/sysv/linux/x86/elision-trylock.c (__lll_trylock_elision): Likewise.
2016-12-02Add llogb, llogbf, llogbl.Joseph Myers
TS 18661-1 defines llogb functions that are like ilogb except that they return long int instead of int. Corresponding FP_LLOGB* macros are defined, whose values are required to have the obvious correspondence to those of the FP_ILOGB* macros. This patch implements these functions and macros for glibc. llogb uses the type-generic infrastructure, with an implementation similar to the wrapper for ilogb but with additional conversion from FP_ILOGB* to FP_LLOGB*; this approach avoids needing to modify or duplicate any of the architecture-specific ilogb implementations. Tests are also based on those for ilogb. Ideally the llogb functions would alias the ilogb ones when long is 32-bit, but such aliasing requires the associated header declarations of the different-type alias to be hidden, typically by defining macros before including the header (see e.g. how sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c defines lround to __hidden_lround before including <math.h>). The infrastructure for type-generic function implementations does not support defining such macros at present (since C code can't define a macro whose name is determined by other macros). So this patch leaves them as separate functions (similar to e.g. scalbln and scalbn being separate in such a case as well), but with the remapping of FP_ILOGB* to FP_LLOGB* conditioned out in the case where it would be the identity map. Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb): New declaration. * math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb): New macro. * math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (__FP_LONG_MAX): New macro. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGB0): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGBNAN): Likewise. * math/Versions (llogb): New libm symbol at version GLIBC_2.25. (llogbf): Likewise. (llogbl): Likewise. * math/Makefile (gen-libm-calls): Add w_llogbF. (tests): Add test-fp-llogb-constants. * math/w_llogb_template.c: New file. Based on math/w_ilogb_template.c. * math/libm-test.inc (llogb_test_data): New array. (llogb_test): New function. (main): Call llogb_test. * math/test-fp-llogb-constants.c: New file. Based on math/test-fp-ilogb-constants.c. * math/test-tgmath-ret.c (llogb): New CHECK_RET_CONST call. (do_test): Call check_return_llogb. * math/test-tgmath.c (NCALLS): Increase to 126. (F(compile_test)): Call llogb. (F(llogb)): New function. * manual/math.texi (Exponents and Logarithms): Document llogb, llogbf, llogbl, FP_LLOGB0 and FP_LLOGBNAN. * manual/libm-err-tab.pl (@all_functions): Add llogb. * sysdeps/ieee754/ldbl-opt/nldbl-llogb.c: New file. * sysdeps/ieee754/ldbl-opt/w_llogbl.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add llogb. (CFLAGS-nldbl-llogb.c): New variable. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-12-01Add missing hidden_def (__sigsetjmp).Joseph Myers
This patch adds the missing hidden_def (__sigsetjmp) on various architectures that were failing to build (as noted in <https://sourceware.org/ml/libc-alpha/2016-11/msg01124.html>). Tested (compilation only) with build-many-glibcs.py. * sysdeps/alpha/setjmp.S (__sigsetjmp): Use hidden_def. * sysdeps/hppa/setjmp.S (__sigsetjmp): Likewise. * sysdeps/mips/mips64/setjmp.S (__sigsetjmp): Likewise. * sysdeps/mips/setjmp.S (__sigsetjmp): Likewise. * sysdeps/sh/sh3/setjmp.S (__sigsetjmp): Likewise. * sysdeps/sh/sh4/setjmp.S (__sigsetjmp): Likewise. * sysdeps/sparc/sparc32/setjmp.S (__sigsetjmp): Likewise. * sysdeps/tile/setjmp.S (__sigsetjmp): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/setjmp.S (__sigsetjmp): Likewise.
2016-11-30ld.so: Remove __libc_memalignFlorian Weimer
It is no longer needed since commit 6c444ad6e953dbdf9c7be065308a0a777 (elf: Do not use memalign for TCB/TLS blocks allocation [BZ #17730]). Applications do not link against ld.so and will use the definition in libc.so, so there is no ABI impact.
2016-11-30Implement _dl_catch_error, _dl_signal_error in libc.so [BZ #16628]Florian Weimer
This change moves the main implementation of _dl_catch_error, _dl_signal_error to libc.so, where TLS variables can be used directly. This removes a writable function pointer from the rtld_global variable. For use during initial relocation, minimal implementations of these functions are provided in ld.so. These are eventually interposed by the libc.so implementations. This is implemented by compiling elf/dl-error-skeleton.c twice, via elf/dl-error.c and elf/dl-error-minimal.c. As a side effect of this change, the static version of dl-error.c no longer includes support for the _dl_signal_cerror/_dl_receive_error mechanism because it is only used in ld.so.
2016-11-29Use XSTAT_IS_XSTAT64 in generic xstat functionsSteve Ellcey
* sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat.c: Do not define fxstat if XSTAT_IS_XSTAT64 is set to non-zero. * sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c: Ditto for fxstatat. * sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat.c: Ditto for lxstat. * sysdeps/unix/sysv/linux/generic/wordsize-32/xstat.c: Ditto for xstat. * sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat64.c: New file. * sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat64.c: New file. * sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat64.c: Make __lxstat an alias of __lxstat64 if XSTAT_IS_XSTAT64 is set to non-zero. * sysdeps/unix/sysv/linux/generic/wordsize-32/xstat64.c: Ditto for __xstat.
2016-11-29powerpc: Remove unintended __longjmp symbol from ABIFlorian Weimer
The __longjmp symbol was left in accidentally. It is not exported through a Versions file, but through a .symver assembler directive. The corresponding exported symbol was removed from the non-fpu powerpc64 targets in commit 9b9ef823581ecee546653d6ac3fd335f7b79faca.
2016-11-28Work around IA64 tst-setcontext2.c compile failure.Joseph Myers
Building tests for IA64 runs into a build failure compiling stdlib/tst-setcontext2.c: tst-setcontext2.c: In function 'do_test': tst-setcontext2.c:210:20: error: passing argument 1 of 'sigismember' from incompatible pointer type [-Werror=incompatible-pointer-types] if (sigismember (&oldctx.uc_sigmask, SIGUSR2) != 1) ^ Indeed, the IA64 uc_sigmask as unsigned long rather than the larger userspace sigset_t. Fixing this might be hard; this patch works around the build failure by making IA64 wrap the test with a version that #defines sigismember to add a cast (I'd welcome a better approach for fixing this). Tested (compilation only) for ia64. * sysdeps/unix/sysv/linux/ia64/tst-setcontext2.c: New file.
2016-11-28Partial ILP32 support for aarch64.Steve Ellcey
* sysdeps/aarch64/crti.S: Add include of sysdep.h. (call_weak_fn): Use PTR_REG to get correct reg name in ILP32. * sysdeps/aarch64/dl-irel.h: Add include of sysdep.h. (elf_irela): Use AARCH64_R macro to get correct relocation in ILP32. * sysdeps/aarch64/dl-machine.h: Add include of sysdep.h. (elf_machine_load_address, RTLD_START, RTLD_START_1, RTLD_START, elf_machine_type_class, ELF_MACHINE_JMP_SLOT, elf_machine_rela, elf_machine_lazy_rel): Add ifdef's for ILP32 support. * sysdeps/aarch64/dl-tlsdesc.S (_dl_tlsdesc_return, _dl_tlsdesc_return_lazy, _dl_tlsdesc_dynamic, _dl_tlsdesc_resolve_hold): Extend pointers in ILP32, use PTR_REG to get correct reg name for ILP32. * sysdeps/aarch64/dl-trampoline.S (ip01): New Macro. (RELA_SIZE): New Macro. (_dl_runtime_resolve, _dl_runtime_profile): Use new macros and PTR_REG to support ILP32. * sysdeps/aarch64/jmpbuf-unwind.h (_JMPBUF_CFA_UNWINDS_ADJ): Add cast for ILP32 mode. * sysdeps/aarch64/memcmp.S (memcmp): Extend arg pointers for ILP32 mode. * sysdeps/aarch64/memcpy.S (memmove, memcpy): Ditto. * sysdeps/aarch64/memset.S (__memset): Ditto. * sysdeps/aarch64/strchr.S (strchr): Ditto. * sysdeps/aarch64/strchrnul.S (__strchrnul): Ditto. * sysdeps/aarch64/strcmp.S (strcmp): Ditto. * sysdeps/aarch64/strcpy.S (strcpy): Ditto. * sysdeps/aarch64/strlen.S (__strlen): Ditto. * sysdeps/aarch64/strncmp.S (strncmp): Ditto. * sysdeps/aarch64/strnlen.S (strnlen): Ditto. * sysdeps/aarch64/strrchr.S (strrchr): Ditto. * sysdeps/unix/sysv/linux/aarch64/clone.S: Ditto. * sysdeps/unix/sysv/linux/aarch64/setcontext.S (__setcontext): Ditto. * sysdeps/unix/sysv/linux/aarch64/swapcontext.S (__swapcontext): Ditto. * sysdeps/aarch64/__longjmp.S (__longjmp): Extend pointers in ILP32, change PTR_MANGLE call to use register numbers instead of names. * sysdeps/unix/sysv/linux/aarch64/getcontext.S (__getcontext): Ditto. * sysdeps/aarch64/setjmp.S (__sigsetjmp): Extend arg pointers for ILP32 mode, change PTR_MANGLE calls to use register numbers. * sysdeps/aarch64/start.S (_start): Ditto. * sysdeps/aarch64/nptl/bits/pthreadtypes.h (__PTHREAD_RWLOCK_INT_FLAGS_SHARED): New define. (__SIZEOF_PTHREAD_ATTR_T, __SIZEOF_PTHREAD_MUTEX_T, __SIZEOF_PTHREAD_MUTEXATTR_T, __SIZEOF_PTHREAD_COND_T, __SIZEOF_PTHREAD_COND_COMPAT_T, __SIZEOF_PTHREAD_CONDATTR_T, __SIZEOF_PTHREAD_RWLOCK_T, __SIZEOF_PTHREAD_RWLOCKATTR_T, __SIZEOF_PTHREAD_BARRIER_T, __SIZEOF_PTHREAD_BARRIERATTR_T): Make defined values dependent on __ILP32__. * sysdeps/aarch64/nptl/bits/semaphore.h (__SIZEOF_SEM_T): Change define. (sem_t): Change __align type. * sysdeps/aarch64/sysdep.h (AARCH64_R, PTR_REG, PTR_LOG_SIZE, DELOUSE, PTR_SIZE): New Macros. (LDST_PCREL, LDST_GLOBAL) Update to use PTR_REG. * sysdeps/unix/sysv/linux/aarch64/bits/fcntl.h (O_LARGEFILE): Set when in ILP32 mode. (F_GETLK64, F_SETLK64, F_SETLKW64): Only set in LP64 mode. * sysdeps/unix/sysv/linux/aarch64/dl-cache.h (DL_CACHE_DEFAULT_ID): Set elf flags for ILP32. (add_system_dir): Set ILP32 library directories. * sysdeps/unix/sysv/linux/aarch64/init-first.c (_libc_vdso_platform_setup): Set minimum kernel version for ILP32. * sysdeps/unix/sysv/linux/aarch64/ldconfig.h (SYSDEP_KNOWN_INTERPRETER_NAMES): Add ILP32 names. * sysdeps/unix/sysv/linux/aarch64/sigcontextinfo.h (GET_PC, SET_PC): New Macros. * sysdeps/unix/sysv/linux/aarch64/sysdep.h: Handle ILP32 pointers.
2016-11-28Fix for [f]statfs64/[f]statfs aliasing patchSteve Ellcey
* sysdeps/unix/sysv/linux/fstatfs64.c: Reorder include files, only alias fstatfs and __fstatfs if STATFS_IS_STATFS64 is non-zero. * sysdeps/unix/sysv/linux/statfs64.c: Ditto for statfs and __statfs.
2016-11-28Do not include asm/cachectl.h in nios2 sys/cachectl.h.Joseph Myers
The nios2 sys/cachectl.h includes a kernel header asm/cachectl.h, which does not exist, so causing the check-installed-headers tests to fail. This patch removes the include of a nonexistent header. Tested (compilation only) for nios2. * sysdeps/unix/sysv/linux/nios2/sys/cachectl.h: Do not include <asm/cachectl.h>.
2016-11-24Add setpayloadsig, setpayloadsigf, setpayloadsigl.Joseph Myers
TS 18661-1 defines functions for manipulating the payloads of NaNs. This patch implements the setpayloadsig functions for glibc; these are like the setpayload functions, but produce a signaling NaN instead of a quiet NaN. The substance of the implementation was included with the setpayload implementation, so the new files here just need to wrap the main files with different defines to build the new functions. Because the functions store a signaling NaN via a pointer and the libm-test macros choose a suitable initial value for the variable in such a case by comparing with the expected value, the relevant macro needs to clear exceptions after FE_INVALID may have been raised by that comparison. Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (setpayloadsig): New declaration. * math/Versions (setpayloadsig): New libm symbol at version GLIBC_2.25. (setpayloadsigf): Likewise. (setpayloadsigl): Likewise. * math/Makefile (libm-calls): Add s_setpayloadsigF. * math/libm-test.inc (RUN_TEST_Ff_b1): Call feclearexcept (FE_ALL_EXCEPT) after initializing EXTRA_VAR. (setpayloadsig_test_data): New array. (setpayloadsig_test): New function. (main): Call setpayloadsig_test. * manual/arith.texi (FP Bit Twiddling): Document setpayloadsig, setpayloadsigf and setpayloadsigl. * manual/libm-err-tab.pl: Update comment on interfaces without ulps tabulated. * sysdeps/ieee754/dbl-64/s_setpayloadsig.c: New file. * sysdeps/ieee754/flt-32/s_setpayloadsigf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_setpayloadsigl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_setpayloadsigl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_setpayloadsigl.c: Likewise. * sysdeps/ieee754/ldbl-opt/nldbl-setpayloadsig.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add setpayloadsig. (CFLAGS-nldbl-setpayloadsig.c): New variable. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-11-24Remove cached PID/TID in cloneAdhemerval Zanella
This patch remove the PID cache and usage in current GLIBC code. Current usage is mainly used a performance optimization to avoid the syscall, however it adds some issues: - The exposed clone syscall will try to set pid/tid to make the new thread somewhat compatible with current GLIBC assumptions. This cause a set of issue with new workloads and usecases (such as BZ#17214 and [1]) as well for new internal usage of clone to optimize other algorithms (such as clone plus CLONE_VM for posix_spawn, BZ#19957). - The caching complexity also added some bugs in the past [2] [3] and requires more effort of each port to handle such requirements (for both clone and vfork implementation). - Caching performance gain in mainly on getpid and some specific code paths. The getpid performance leverage is questionable [4], either by the idea of getpid being a hotspot as for the getpid implementation itself (if it is indeed a justifiable hotspot a vDSO symbol could let to a much more simpler solution). Other usage is mainly for non usual code paths, such as pthread cancellation signal and handling. For thread creation (on stack allocation) the code simplification in fact adds some performance gain due the no need of transverse the stack cache and invalidate each element pid. Other thread usages will require a direct getpid syscall, such as cancellation/setxid signal, thread cancellation, thread fail path (at create_thread), and thread signal (pthread_kill and pthread_sigqueue). However these are hardly usual hotspots and I think adding a syscall is justifiable. It also simplifies both the clone and vfork arch-specific implementation. And by review each fork implementation there are some discrepancies that this patch also solves: - microblaze clone/vfork does not set/reset the pid/tid field - hppa uses the default vfork implementation that fallback to fork. Since vfork is deprecated I do not think we should bother with it. The patch also removes the TID caching in clone. My understanding for such semantic is try provide some pthread usage after a user program issue clone directly (as done by thread creation with CLONE_PARENT_SETTID and pthread tid member). However, as stated before in multiple discussions threads, GLIBC provides clone syscalls without further supporting all this semantics. I ran a full make check on x86_64, x32, i686, armhf, aarch64, and powerpc64le. For sparc32, sparc64, and mips I ran the basic fork and vfork tests from posix/ folder (on a qemu system). So it would require further testing on alpha, hppa, ia64, m68k, nios2, s390, sh, and tile (I excluded microblaze because it is already implementing the patch semantic regarding clone/vfork). [1] https://codereview.chromium.org/800183004/ [2] https://sourceware.org/ml/libc-alpha/2006-07/msg00123.html [3] https://sourceware.org/bugzilla/show_bug.cgi?id=15368 [4] http://yarchive.net/comp/linux/getpid_caching.html * sysdeps/nptl/fork.c (__libc_fork): Remove pid cache setting. * nptl/allocatestack.c (allocate_stack): Likewise. (__reclaim_stacks): Likewise. (setxid_signal_thread): Obtain pid through syscall. * nptl/nptl-init.c (sigcancel_handler): Likewise. (sighandle_setxid): Likewise. * nptl/pthread_cancel.c (pthread_cancel): Likewise. * sysdeps/unix/sysv/linux/pthread_kill.c (__pthread_kill): Likewise. * sysdeps/unix/sysv/linux/pthread_sigqueue.c (pthread_sigqueue): Likewise. * sysdeps/unix/sysv/linux/createthread.c (create_thread): Likewise. * sysdeps/unix/sysv/linux/getpid.c: Remove file. * nptl/descr.h (struct pthread): Change comment about pid value. * nptl/pthread_getattr_np.c (pthread_getattr_np): Remove thread pid assert. * sysdeps/unix/sysv/linux/pthread-pids.h (__pthread_initialize_pids): Do not set pid value. * nptl_db/td_ta_thr_iter.c (iterate_thread_list): Remove thread pid cache check. * nptl_db/td_thr_validate.c (td_thr_validate): Likewise. * sysdeps/aarch64/nptl/tcb-offsets.sym: Remove pid offset. * sysdeps/alpha/nptl/tcb-offsets.sym: Likewise. * sysdeps/arm/nptl/tcb-offsets.sym: Likewise. * sysdeps/hppa/nptl/tcb-offsets.sym: Likewise. * sysdeps/i386/nptl/tcb-offsets.sym: Likewise. * sysdeps/ia64/nptl/tcb-offsets.sym: Likewise. * sysdeps/m68k/nptl/tcb-offsets.sym: Likewise. * sysdeps/microblaze/nptl/tcb-offsets.sym: Likewise. * sysdeps/mips/nptl/tcb-offsets.sym: Likewise. * sysdeps/nios2/nptl/tcb-offsets.sym: Likewise. * sysdeps/powerpc/nptl/tcb-offsets.sym: Likewise. * sysdeps/s390/nptl/tcb-offsets.sym: Likewise. * sysdeps/sh/nptl/tcb-offsets.sym: Likewise. * sysdeps/sparc/nptl/tcb-offsets.sym: Likewise. * sysdeps/tile/nptl/tcb-offsets.sym: Likewise. * sysdeps/x86_64/nptl/tcb-offsets.sym: Likewise. * sysdeps/unix/sysv/linux/aarch64/clone.S: Remove pid and tid caching. * sysdeps/unix/sysv/linux/alpha/clone.S: Likewise. * sysdeps/unix/sysv/linux/arm/clone.S: Likewise. * sysdeps/unix/sysv/linux/hppa/clone.S: Likewise. * sysdeps/unix/sysv/linux/i386/clone.S: Likewise. * sysdeps/unix/sysv/linux/ia64/clone2.S: Likewise. * sysdeps/unix/sysv/linux/mips/clone.S: Likewise. * sysdeps/unix/sysv/linux/nios2/clone.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/clone.S: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/clone.S: Likewise. * sysdeps/unix/sysv/linux/sh/clone.S: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/clone.S: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Likewise. * sysdeps/unix/sysv/linux/tile/clone.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/clone.S: Likewise. * sysdeps/unix/sysv/linux/aarch64/vfork.S: Remove pid set and reset. * sysdeps/unix/sysv/linux/alpha/vfork.S: Likewise. * sysdeps/unix/sysv/linux/arm/vfork.S: Likewise. * sysdeps/unix/sysv/linux/i386/vfork.S: Likewise. * sysdeps/unix/sysv/linux/ia64/vfork.S: Likewise. * sysdeps/unix/sysv/linux/m68k/clone.S: Likewise. * sysdeps/unix/sysv/linux/m68k/vfork.S: Likewise. * sysdeps/unix/sysv/linux/mips/vfork.S: Likewise. * sysdeps/unix/sysv/linux/nios2/vfork.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/vfork.S: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/vfork.S: Likewise. * sysdeps/unix/sysv/linux/sh/vfork.S: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S: Likewise. * sysdeps/unix/sysv/linux/tile/vfork.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/vfork.S: Likewise. * sysdeps/unix/sysv/linux/tst-clone2.c (f): Remove direct pthread struct access. (clone_test): Remove function. (do_test): Rewrite to take in consideration pid is not cached anymore.
2016-11-22Allow [f]statfs64 to alias [f]statfsSteve Ellcey
* sysdeps/unix/sysv/linux/fstatfs64.c: Hide prototypes for fstatfs and __fstatfs. Make them aliases of __fstatfs64 if STATFS_IS_STATFS64 is set to non-zero. * sysdeps/unix/sysv/linux/statfs64.c: Ditto for __statfs, statfs, and __statfs64. * sysdeps/unix/sysv/linux/generic/wordsize-32/fstatfs.c: Do not define __fstatfs and fstatfs if STATFS_IS_STATFS64 is non-zero. * sysdeps/unix/sysv/linux/generic/wordsize-32/statfs.c: Ditto for __statfs and statfs. * sysdeps/unix/sysv/linux/alpha/kernel_stat.h: Set STATFS_IS_STATFS64 to 0. * sysdeps/unix/sysv/linux/generic/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/hppa/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/ia64/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/microblaze/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/mips/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/powerpc/powerpc32/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/powerpc/powerpc64/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/s390/s390-64/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/sparc/sparc32/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/sparc/sparc64/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/x86_64/kernel_stat.h: Ditto.
2016-11-21Always define XSTAT_IS_XSTAT64Steve Ellcey
* sysdeps/unix/sysv/linux/generic/kernel_stat.h: Set XSTAT_IS_XSTAT64 to 0 when in 32 bit mode. * sysdeps/unix/sysv/linux/hppa/kernel_stat.h: Set XSTAT_IS_XSTAT64 to 0. * sysdeps/unix/sysv/linux/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/microblaze/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/mips/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/powerpc/powerpc32/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/sparc/sparc32/kernel_stat.h: Ditto. * sysdeps/unix/sysv/linux/fxstat.c: Replace #ifdef with #if on XSTAT_IS_XSTAT64 test. * sysdeps/unix/sysv/linux/fxstatat.c: Ditto. * sysdeps/unix/sysv/linux/generic/lxstat.c: Ditto. * sysdeps/unix/sysv/linux/generic/xstat.c: Ditto. * sysdeps/unix/sysv/linux/i386/fxstat.c: Ditto. * sysdeps/unix/sysv/linux/i386/fxstatat.c: Ditto. * sysdeps/unix/sysv/linux/i386/lxstat.c: Ditto. * sysdeps/unix/sysv/linux/i386/xstat.c: Ditto. * sysdeps/unix/sysv/linux/lxstat.c: Ditto. * sysdeps/unix/sysv/linux/mips/xstatconv.c: Ditto. * sysdeps/unix/sysv/linux/xstat.c: Ditto. * sysdeps/unix/sysv/linux/xstatconv.c: Ditto.
2016-11-19Add setpayload, setpayloadf, setpayloadl.Joseph Myers
TS 18661-1 defines functions for manipulating the payloads of NaNs. This patch implements the setpayload functions for glibc; these set a number (pointed to by a function argument) to a quiet NaN with the given payload, or to +0 if the given payload is not valid. The implementations are structured to allow the substance of the implementation to be shared with the setpayloadsig functions when those are added. The semantics in the TS are not entirely clear in the case where the payload passed to the function is zero (see discussion on the WG14 reflector last month). This patch implements what seems the most sensible interpretation, that -0 is never valid to give as the payload, but +0 is valid in the case where the kind of NaN being generated has its high mantissa bit set so payload 0 is actually possible in such a NaN. Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (setpayload): New declaration. * math/Versions (setpayload): New libm symbol at version GLIBC_2.25. (setpayloadf): Likewise. (setpayloadl): Likewise. * math/Makefile (libm-calls): Add s_setpayloadF. * math/libm-test.inc (struct test_Ffp_b1_data): Rename to struct test_Ff_b1_data. (RUN_TEST_Ff_b1): New macro. (RUN_TEST_LOOP_Ff_b1): Likewise. (canonicalize_test_data): Update type. (setpayload_test_data): New array. (setpayload_test): New function. (main): Call setpayload_test. * manual/arith.texi (FP Bit Twiddling): Document setpayload, setpayloadf and setpayloadl. * manual/libm-err-tab.pl: Update comment on interfaces without ulps tabulated. * sysdeps/ieee754/dbl-64/s_setpayload.c: New file. * sysdeps/ieee754/dbl-64/s_setpayload_main.c: Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_setpayload_main.c: Likewise. * sysdeps/ieee754/flt-32/s_setpayloadf.c: Likewise. * sysdeps/ieee754/flt-32/s_setpayloadf_main.c: Likewise. * sysdeps/ieee754/ldbl-128/s_setpayloadl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_setpayloadl_main.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_setpayloadl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_setpayloadl_main.c: Likewise. * sysdeps/ieee754/ldbl-96/s_setpayloadl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_setpayloadl_main.c: Likewise. * sysdeps/ieee754/ldbl-opt/nldbl-setpayload.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add setpayload. (CFLAGS-nldbl-setpayload.c): New variable. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-11-18Make tile's set_dataplane API compatibility-onlyChris Metcalf
The set_dataplane() API in <sys/dataplane.h> originally supported the Tilera version of Linux as shipped to our customers. Once we started upstreaming the dataplane support in the kernel, the API changed to use fcntl() as part of the current task-isolation patch series. It doesn't seem like continuing to support the old API is useful for newly-compiled code, and even supporting the old glibc binary API on an upstream kernel that supports the new task isolation mode isn't straightforward, since the semantics have changed in ways that make it hard to map the old semantics precisely to the new ones, so just return ENOSYS.
2016-11-17Consolidate Linux setrlimit and getrlimit implementationAdhemerval Zanella
This patch consolidates all Linux setrlimit and getrlimit on the default sysdeps/unix/sysv/linux/{set,get}rlimit{64}.c. It contains two exceptions: 1. mips32 and mips64n32 which requires a versioned symbol for GLIBC 2.19 and higher due a broken RLIM64_INFINITY constant. 2. sparc32 does not define a compat symbol for getrlimit64 for old 2GB limit. I am not sure if it is required, but a RLIM_INFINITY fix [1] change its definition without adding a compat symbol. This patch does not aim to address this possible issue, it follow current symbol export. The default implementation uses prlimit64 for 64 bit rlim_t ({set,get}rlimit64) and if it fails with ENOSYS it fall back to {get,set}rlimit syscall. This code path is only used on kernel older than 2.6.36 (basically now only x86) and I avoid to user __ASSUME_PRLIMTI64 to simplify the implementation. Once x86 moves to be on par with other architectures regarding minimum kernel supported we can get rid of using old syscalls and default path. A new type size define is added, __RLIM_T_MATCHES_RLIM64_T, where is set as default for 64 bits ports. This allows the default implementation to avoid {get,set}rlimit building and alias {get,set}rlimit64 to {get,set}rlimit. Checked on x86_64, i386, armhf, aarch64, and powerpc64le. I also did a sanity build plus check-abi on all other supported architectures. [1] Commit 9c96ff23858b0759e12ad69e3c4599931c90bee8 Adhemerval Zanella <adhemerval.zanella@linaro.org> Yury Norov <ynorov@caviumnetworks.com> * bits/typesizes.h (__RLIM_T_MATCHES_RLIM64_T): define. * sysdeps/unix/sysv/linux/alpha/bits/typesizes.h (__RLIM_T_MATCHES_RLIM64_T): Likewise. * sysdeps/unix/sysv/linux/generic/bits/typesizes.h (__RLIM_T_MATCHES_RLIM64_T): Likewise. * sysdeps/unix/sysv/linux/s390/bits/typesizes.h [__s390x__] (__RLIM_T_MATCHES_RLIM64_T): Likewise. * sysdeps/unix/sysv/linux/sparc/bits/typesizes.h [__arch64__ || __sparcv9] (__RLIM_T_MATCHES_RLIM64_T): Likewise. * sysdeps/unix/sysv/linux/x86/bits/typesizes.h [__86_64__] (__RLIM_T_MATCHES_RLIM64_T): Likewise. * sysdeps/unix/sysv/linux/arm/Makefile [$(subdir) = resource] (sysdep_routines): Remove oldgetrlimit64. * sysdeps/unix/sysv/linux/i386/Makefile [$(subdir) = resource] (sysdep_routines): Likewise. * sysdeps/unix/sysv/linux/m68k/Makefile [$(subdir) = resource] (sysdep_routines): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/Makefile [$(subdir) = resource] (sysdep_routines): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/Makefile [$(subdir) = resource] (sysdep_routines): Likewise. * sysdeps/unix/sysv/linux/arm/getrlimit64.c: Remove file. * sysdeps/unix/sysv/linux/arm/oldgetrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/hppa/getrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/i386/getrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/i386/oldgetrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/m68k/getrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/m68k/oldgetrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/getrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/oldgetrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/getrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/oldgetrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/sh/getrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/getrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/setrlimit64.c: Likewise. * sysdeps/sysv/linux/generic/wordsize-32/syscalls.list: Remove setrlimit and getrlimit. * sysdeps/unix/sysv/linux/hppa/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/i386/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/getrlimit.c: New file. * sysdeps/unix/sysv/linux/sparc/getrlimit64.c: Likewise. * sysdeps/unix/sysv/linux/setrlimit.c: Likewise. * sysdeps/unix/sysv/linux/getrlimit64.c (__getrlimit64): Handle __RLIM_T_MATCHES_RLIM64_T and add alias if defined. (__old_getrlimit64): Add compatibility symbol. * sysdeps/unix/sysv/linux/setrlimit64.c (__setrlimit): Likewise.
2016-11-17Make Alpha <sys/user.h> self-contained.Joseph Myers
The check-installed-headers tests show up that the Alpha <sys/user.h> is not self-contained, using size_t without including any header that defines it. This patch fixes it by including <stddef.h>, as done for other architectures' versions of this header. Tested for Alpha (compilation only). * sysdeps/unix/sysv/linux/alpha/sys/user.h: Include <stddef.h>.
2016-11-16New internal function __access_noerrnoAdhemerval Zanella
Implement an internal version of __access called __access_noerrno that avoids setting errno. This is useful to check accessibility of files very early on in process startup i.e. before TLS setup. This allows tunables to replace MALLOC_CHECK_ safely (i.e. check existence of /etc/suid-debug to enable/disable MALLOC_CHECK) and at the same time initialize very early so that it can override IFUNCs. Checked on x86_64. * hurd/hurd.h (__hurd_fail_noerrno): New function. * include/unistd.h [IS_IN (rtld) || !defined SHARED]: Declare __access_noerrno. * io/access.c (__access_noerrno): New function. * sysdeps/mach/hurd/access.c (hurd_fail_seterrno): New function. (hurd_fail_seterrno): Likewise. (access_common): Likewise. (__access_noerrno): Likewise. * sysdeps/nacl/access.c (__access_noerrno): Likewise. * sysdeps/unix/sysv/linux/access.c (__access_noerrno): Likewise. * sysdeps/nacl/nacl-interfaces.h (NACL_CALL_NOERRNO): New macro.
2016-11-16Fix SH4 register-dump.h for soft-float.Joseph Myers
This patch fixes SH4 register-dump.h to declare a variable inside the the build for soft-float. Tested (compilation only) for SH4 soft-float. * sysdeps/unix/sysv/linux/sh/sh4/register-dump.h (register_dump): Only declare fpregs if [__SH_FPU_ANY__].
2016-11-15Make SH ucontext always match current kernels.Joseph Myers
As discussed in the thread starting at <https://sourceware.org/ml/libc-alpha/2015-06/msg00657.html>, there are various problems with the sigcontext / mcontext / ucontext structures on SH. The soft-float SH4 case in fact does not build at present, with errors processing sysdeps/unix/sysv/linux/sh/sh4/ucontext_i.sym with gen-as-const.awk ("error: 'mcontext_t {aka struct <anonymous>}' has no member named 'fpregs'"). Linux 4.8 (commit bbe6c77857c38f4acbdc4fc70399515226d1859a) moved to always using the same sigcontext structure on SH, with room for floating-point registers whether or not present on the processor. This patch makes the glibc header match. Tested (compilation only) for sh4-linux-gnu hard float, and in conjunction with other fixes for soft float. * sysdeps/unix/sysv/linux/sh/sys/ucontext.h [__SH4__ || __SH4A__]: Make code unconditional. [!(__SH4__ || __SH4A__)]: Remove conditional code.
2016-11-14Make tilegx32 install libraries in lib32 directories.Joseph Myers
This patch makes tilegx32 install libraries in lib32 directories, matching what GCC expects and avoiding conflict with 64-bit libraries installed in lib directories. Tested (compilation only) for tilegx (32-bit and 64-bit, BE and LE, GCC 5). * sysdeps/unix/sysv/linux/tile/tilegx/configure.ac: Use LIBC_SLIBDIR_RTLDDIR for tilegx32. * sysdeps/unix/sysv/linux/tile/tilegx/configure: Regenerated.
2016-11-11Make SH <sys/user.h> self-contained.Joseph Myers
The check-installed-headers tests show up that the SH <sys/user.h> is not self-contained, using size_t without including any header that defines it. This patch fixes it by including <stddef.h>, as done for other architectures' versions of this header. Tested for SH3 and SH4 (compilation only). * sysdeps/unix/sysv/linux/sh/sys/user.h: Include <stddef.h>.
2016-11-10Fix sh4 build with __ASSUME_ST_INO_64_BIT redefinitionAdhemerval Zanella
Since 327792c sh4 builds fails with: ../sysdeps/unix/sysv/linux/kernel-features.h:49:0: error: "__ASSUME_ST_INO_64_BIT" redefined [-Werror] #define __ASSUME_ST_INO_64_BIT 1 ^ In file included from ../sysdeps/unix/sysv/linux/sysdep.h:19:0, from ../sysdeps/unix/sysv/linux/sh/sysdep.h:24, from ../sysdeps/unix/sysv/linux/sh/sh4/sysdep.h:4, from <stdin>:1: ../sysdeps/unix/sysv/linux/sh/kernel-features.h:47:0: note: this is the location of the previous definition #define __ASSUME_ST_INO_64_BIT 0 It is because sh4 kernel-features.sh is included multiple times without guards and this patch fixes by adding them. Tested on a sh4-linux-gnu build. * sysdeps/unix/sysv/linux/sh/kernel-features.h: Add include guards.
2016-11-10Consolidate Linux access implementationAdhemerval Zanella
This patch consolidates the Linux access implementation on sysdeps/unix/sysv/linux/access.c. Similar to auto-generation through syscalls.list, __NR_access is check and __NR_faccessat is used only for newer architectures (where __NR_access is not defined). Checked on x86_64. * sysdeps/unix/sysv/linux/access.c: New file. * sysdeps/unix/sysv/linux/generic/access.c: Remove file.
2016-11-09Consolidate Linux truncate implementationsAdhemerval Zanella
This patch consolidates all Linux truncate implementation on sysdeps/unix/sysv/linux/truncate{64}.c. It is based on {INTERNAL,INLINE}_SYSCALL patch [1] to simplify the syscall construction. General idea is to build ftruncate iff __OFF_T_MATCHES_OFF64_T is not defined, otherwise ftruncate64 will be build and ftruncate will be an alias. The fallocate will use old compat syscall and pass 32-bit off_t argument, while fallocate64 will handle the correct off64_t passing using __ALIGNMENT_ARG and SYSCALL_LL64 macros. Tested on x86_64, i386, aarch64, and armhf. * sysdeps/unix/sysv/linux/arm/truncate64.c: Remove file. * sysdeps/unix/sysv/linux/generic/wordsize-32/truncate.c: Likewise. * sysdeps/sysv/linux/generic/wordsize-32/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/truncate.c: New file. * sysdeps/unix/sysv/linux/truncate64.c (truncate64): Use INLINE_SYSCALL_CALL, __ALIGNMENT_ARG and SYSCALL_LL64 macros. * sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (truncate): Remove. * sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (truncate): Likewise. [1] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html
2016-11-09Consolidate Linux ftruncate implementationsAdhemerval Zanella
THis patch consolidates all Linux ftruncate implementation on sysdeps/unix/sysv/linux/ftruncate{64}.c. It is based on {INTERNAL,INLINE}_SYSCALL patch [1] to simplify the syscall construction. General idea is to build ftruncate iff __OFF_T_MATCHES_OFF64_T is not defined, otherwise ftruncate64 will be build and ftruncate will be an alias. The fallocate will use old compat syscall and pass 32-bit off_t argument, while fallocate64 will handle the correct off64_t passing using __ALIGNMENT_ARG and SYSCALL_LL64 macros. Tested on x86_64, i386, aarch64, and armhf. * posix/tst-truncate-common.c: New file. * posix/tst-truncate.c: Use tst-truncate-common.c. * posix/tst-truncate64.c: Likewise and add LFS tests. * sysdeps/unix/sysv/linux/arm/ftruncate64.c: Remove file. * sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/ftruncate.c: New file. * sysdeps/unix/sysv/linux/ftruncate64.c (__ftruncate64): Use INLINE_SYSCALL_CALL, __ALIGNMENT_ARG and SYSCALL_LL64 macros. [__OFF_T_MATCHES_OFF64_T] (ftruncate): Add alias. * sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (ftruncate): Remove. * sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (ftruncate): Likewise. [1] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html
2016-11-08Add localplt.data for sh.Joseph Myers
This patch adds a localplt.data file for sh so that test passes. The architecture-specific entries are for _Unwind_Find_FDE, _exit and __errno_location. Tested for sh3 and sh4. * sysdeps/unix/sysv/linux/sh/localplt.data: New file.
2016-11-08Add localplt.data for hppa.Joseph Myers
This patch adds a localplt.data file for hppa so that test passes. Architecture maintainers should feel free to clean up the sysdeps code so that some or all of the system-specific entries libc.so: _exit libc.so: __sigsetjmp libc.so: _IO_funlockfile libc.so: sigprocmask libc.so: __errno_location libpthread.so: __errno_location are no longer needed. Tested for hppa. Note: check-execstack and check-textrel still fail; you may wish to look at those to get to a clean baseline there (they are less obvious for people not familiar with the architecture). * sysdeps/unix/sysv/linux/hppa/localplt.data: New file.
2016-11-08Update alpha localplt.data.Joseph Myers
This patch updates alpha localplt.data so the localplt test passes in my compile-only all-ABIs glibc testing. The failures I see without this patch are: Missing required PLT reference: ld.so: __tls_get_addr Missing required PLT reference: ld.so: free Now, __tls_get_addr can be made optional. For free, rather than making it optional as in libc.so it seems better to mark all the malloc-related symbols in both libc.so and ld.so as allowing an R_ALPHA_GLOB_DAT relocation as an alternative to using a PLT entry, so this patch does so. Tested for alpha. * sysdeps/unix/sysv/linux/alpha/localplt.data: Make __tls_get_addr optional in ld.so. Allow R_ALPHA_GLOB_DAT relocation for malloc, calloc, realloc, free, memalign and __libc_memalign rather than making them optional.
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