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2012-02-09small fix for new pthread cleanup stuffRich Felker-1/+1
even if pthread_create/exit code is not linked, run flag needs to be checked and cleanup function potentially run on pop. thus, move the code to the module that's always linked when pthread_cleanup_push/pop is used.
2012-02-09replace bad cancellation cleanup abi with a sane oneRich Felker-62/+23
the old abi was intended to duplicate glibc's abi at the expense of being ugly and slow, but it turns out glib was not even using that abi except on non-gcc-compatible compilers (which it doesn't even support) and was instead using an exceptions-in-c/unwind-based approach whose abi we could not duplicate anyway without nasty dwarf2/unwind integration. the new abi is copied from a very old glibc abi, which seems to still be supported/present in current glibc. it avoids all unwinding, whether by sjlj or exceptions, and merely maintains a linked list of cleanup functions to be called from the context of pthread_exit. i've made some care to ensure that longjmp out of a cleanup function should work, even though it is not required to. this change breaks abi compatibility with programs which were using pthread cancellation, which is unfortunate, but that's why i'm making the change now rather than later. considering that most pthread features have not been usable until recently anyway, i don't see it as a major issue at this point.
2012-02-09document iswspace and remove wrongly-included zwsp characterRich Felker-1/+5
2012-02-09fix typo in iswspace space list tableRich Felker-1/+1
2012-02-07protect against cancellation in dlopenRich Felker-2/+5
i'm not sure that it's "correct" for dlopen to block cancellation when calling constructors for libraries it loads, but it sure seems like the right thing. in any case, dlopen itself needs cancellation blocked.
2012-02-07reduce some wasted space in dso structureRich Felker-3/+3
2012-02-06more locale_t interfaces (string stuff) and header updatesRich Felker-0/+48
this should be everything except for some functions where the non-_l version isn't even implemented yet (mainly some non-ISO-C wcs* functions).
2012-02-06fix some omissions and mistakes in locale_t interface definitionsRich Felker-13/+13
2012-02-06add more of the locale_t interfaces, all dummied out to ignore the localeRich Felker-0/+108
2012-02-06x86_64 vfork implementationRich Felker-0/+12
untested; should work.
2012-02-06run ctors/dtors for shared objects loaded with dlopenRich Felker-0/+1
2012-02-06add support for init/finit (constructors and destructors)Rich Felker-0/+19
this is mainly in hopes of supporting c++ (not yet possible for other reasons) but will also help applications/libraries which use (and more often, abuse) the gcc __attribute__((__constructor__)) feature in "C" code. x86_64 and arm versions of the new startup asm are untested and may have minor problems.
2012-02-06add deprecated (removed from posix) [efg]cvt() functionsRich Felker-0/+52
these have not been heavily tested, but they should work as described in the old standards. probably broken for non-finite values...
2012-02-03include dummied-out dlopen and dlsym functions for static binariesRich Felker-1/+10
these don't work (or do anything at all) but at least make it possible to static link programs that insist on "having" dynamic loading support...as long as they don't actually need to use it. adding real support for dlopen/dlsym with static linking is going to be significantly more difficult...
2012-02-02make stdio open, read, and write operations cancellation pointsRich Felker-5/+28
it should be noted that only the actual underlying buffer flush and fill operations are cancellable, not reads from or writes to the buffer. this behavior is compatible with POSIX, which makes all cancellation points in stdio optional, and it achieves the goal of allowing cancellation of a thread that's "stuck" on IO (due to a non-responsive socket/pipe peer, slow/stuck hardware, etc.) without imposing any measurable performance cost.
2012-02-01make passwd/group functions safe against cancellation in stdioRich Felker-6/+35
these changes are a prerequisite to making stdio cancellable.
2012-01-29add fgetpwent (nonstandard function)Rich Felker-0/+9
based on patch by Jeremy Huntwork
2012-01-28add linux setfs[ug]id syscall wrappersRich Felker-0/+16
patch by Jeremy Huntwork
2012-01-24add legacy futimes and lutimes functionsRich Felker-0/+26
based on patch by sh4rm4. these functions are deprecated; futimens and utimensat should be used instead in new programs.
2012-01-23make glob mark symlinks-to-directories with the GLOB_MARK flagRich Felker-1/+1
POSIX is unclear on whether it should, but all historical implementations seem to behave this way, and it seems more useful to applications.
2012-01-23fix broken copy relocations from dynamic linker cleanupRich Felker-1/+4
this issue affected programs which use global variables exported by non-libc libraries.
2012-01-23dynamic linker support for PIE binaries (position-independent main program)Rich Felker-3/+6
even with this change, PIE will not work yet due to deficiencies in the crt1.o startup code.
2012-01-23cleanup dynamic linker, removing some code duplicationRich Felker-80/+66
2012-01-22fix cancellation failure in single-threaded programsRich Felker-1/+1
even a single-threaded program can be cancellable, e.g. if it's called pthread_cancel(pthread_self()). the correct predicate to check is not whether multiple threads have been invoked, but whether pthread_self has been invoked.
2012-01-22support GLOB_PERIOD flag (GNU extension) to glob functionRich Felker-1/+2
patch by sh4rm4
2012-01-20use prlimit syscall for getrlimit/setrlimitRich Felker-4/+14
this allows the full range of 64-bit limit arguments even on 32-bit systems. fallback to the old syscalls on old kernels that don't support prlimit.
2012-01-20add prlimit syscall wrapperRich Felker-0/+8
2012-01-20fix dynamic linker not to depend on DYNAMIC ptr in 0th entry of GOTRich Felker-3/+12
this fixes an issue using gold instead of gnu ld for linking. it also should eliminate the need of the startup code to even load/pass the got address to the dynamic linker. based on patch submitted by sh4rm4 with minor cosmetic changes. further cleanup will follow.
2012-01-18alias basename to glibc name for it, to meet abi goalsRich Felker-0/+3
note that regardless of the name used, basename is always conformant. it never takes on the bogus gnu behavior, unlike glibc where basename is nonconformant when declared manually without including libgen.h.
2012-01-17fix char signedness bug in dynlinker hash functionRich Felker-1/+2
this only affects non-ascii symbol names, which are probably not in use anyway..
2011-12-23fix broken reboot wrapper (syscall needs extra silly magic arguments...)Rich Felker-1/+1
2011-11-16fix issue with excessive mremap syscalls on reallocRich Felker-4/+2
CHUNK_SIZE macro was defined incorrectly and shaving off at least one significant bit in the size of mmapped chunks, resulting in the test for oldlen==newlen always failing and incurring a syscall. fortunately i don't think this issue caused any other observable behavior; the definition worked correctly for all non-mmapped chunks where its correctness matters more, since their lengths are always multiples of the alignment.
2011-11-10fix signed overflows at most-negative values in ato(i|l|ll)Rich Felker-6/+9
patch by Pascal Cuoq (with minor tweaks to comments)
2011-10-26report sem value overflows in sem_postRich Felker-0/+4
this is not required by the standard, but it's nicer than corrupting the state and rather inexpensive.
2011-10-14support vfork on i386Rich Felker-0/+14
2011-10-14make available a namespace-safe vfork, if supportedRich Felker-1/+4
this may be useful to posix_spawn..?
2011-10-14add dummy __cxa_finalizeRich Felker-0/+4
musl's dynamic linker does not support unloading dsos, so there's nothing for this function to do. adding the symbol in case anything depends on its presence..
2011-10-14support __cxa_atexit, and registering atexit functions from atexit handlersRich Felker-7/+26
mildly tested; may have bugs. the locking should be updated not to use spinlocks but that's outside the scope of this one module.
2011-10-14simplify atexit and fflush-on-exit handlingRich Felker-9/+12
2011-10-09fix F_GETOWN return value handlingRich Felker-0/+1
the fcntl syscall can return a negative value when the command is F_GETOWN, and this is not an error code but an actual value. thus we must special-case it and avoid calling __syscall_ret to set errno. this fix is better than the glibc fix (using F_GETOWN_EX) which only works on newer kernels and is more complex.
2011-10-09fix typo in arm clone() asmRich Felker-1/+1
2011-10-03recovering ownerdead robust mutex must reset recursive lock countRich Felker-0/+1
2011-10-03simplify robust mutex unlock code pathRich Felker-4/+4
right now it's questionable whether this change is an improvement or not, but if we later want to support priority inheritance mutexes, it will be important to have the code paths unified like this to avoid major code duplication.
2011-10-03fix crash if pthread_mutex_unlock is called without ever lockingRich Felker-1/+1
this is valid for error-checking mutexes; otherwise it invokes UB and would be justified in crashing.
2011-10-03use count=0 instead of 1 for recursive mutex with only one lock referenceRich Felker-4/+2
this simplifies the code paths slightly, but perhaps what's nicer is that it makes recursive mutexes fully reentrant, i.e. locking and unlocking from a signal handler works even if the interrupted code was in the middle of locking or unlocking.
2011-10-03sysconf for PTHREAD_KEYS_MAXRich Felker-1/+1
2011-10-02synchronize cond var destruction with exiting waitsRich Felker-0/+12
2011-10-01fix failure-to-wake in rwlock unlockRich Felker-1/+1
a reader unlocking the lock need only wake one waiter (necessarily a writer, but a writer unlocking the lock must wake all waiters (necessarily readers). if it only wakes one, the remainder can remain blocked indefinitely, or at least until the first reader unlocks (in which case the whole lock becomes serialized and behaves as a mutex rather than a read lock).
2011-10-01dlsym entry point for armRich Felker-0/+6
2011-10-01dynamic linker entry point for armRich Felker-0/+14
mildly tested, seems to work
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