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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
2011-09-29fix various bugs in path and error handling in execvp/fexecveRich Felker-18/+29
2011-09-28don't crash on null strings in printfRich Felker-1/+1
passing null pointer for %s is UB but lots of broken programs do it anyway
2011-09-28fix excessive/insufficient wakes in __vm_unlockRich Felker-3/+3
there is no need to send a wake when the lock count does not hit zero, but when it does, all waiters must be woken (since all with the same sign are eligible to obtain the lock).
2011-09-28make getmntent_r discard long lines when it returns error, not seek backRich Felker-2/+1
seeking back can be performed by the caller, but if the caller doesn't expect it, it will result in an infinite loop of failures.
2011-09-28improve pshared barriersRich Felker-12/+14
eliminate the sequence number field and instead use the counter as the futex because of the way the lock is held, sequence numbers are completely useless, and this frees up a field in the barrier structure to be used as a waiter count for the count futex, which lets us avoid some syscalls in the best case. as of now, self-synchronized destruction and unmapping should be fully safe. before any thread can return from the barrier, all threads in the barrier have obtained the vm lock, and each holds a shared lock on the barrier. the barrier memory is not inspected after the shared lock count reaches 0, nor after the vm lock is released.
2011-09-28next step making barrier self-sync'd destruction safeRich Felker-6/+18
i think this works, but it can be simplified. (next step)
2011-09-28barrier destroy must also wait for threads in other processes exiting barrierRich Felker-0/+2
the vm lock only waits for threads in the same process exiting. actually this fix is not enough, but it's a start...
2011-09-28stupid typo (caused by rather ugly spelling in POSIX..) in aioRich Felker-1/+1
2011-09-27correctly handle the degenerate barrier in the pshared caseRich Felker-1/+1
2011-09-27fix crash in pthread_cond_wait mutex-locked checkRich Felker-1/+1
it was assuming the result of the condition it was supposed to be checking for, i.e. that the thread ptr had already been initialized by pthread_mutex_lock. use the slower call to be safe.
2011-09-27fix crash in pthread_testcancel if pthread_self has not been calledRich Felker-1/+1
2011-09-27improve/debloat mutex unlock error checking in pthread_cond_waitRich Felker-3/+3
we're not required to check this except for error-checking mutexes, but it doesn't hurt. the new test is actually simpler/lighter, and it also eliminates the need to later check that pthread_mutex_unlock succeeds.
2011-09-27check mutex owner in pthread_cond_waitRich Felker-0/+3
when used with error-checking mutexes, pthread_cond_wait is required to fail with EPERM if the mutex is not locked by the caller. previously we relied on pthread_mutex_unlock to generate the error, but this is not valid, since in the case of such invalid usage the internal state of the cond variable has already been potentially corrupted (due to access outside the control of the mutex). thus, we have to check first.
2011-09-27fix pshared barrier wrong return value.Rich Felker-1/+1
i set the return value but then never used it... oops!
2011-09-27convert the barrier pshared option back to 0/1 values when getting itRich Felker-1/+1
2011-09-27improve error handling in mntent stuff...Rich Felker-2/+9
not sure if this is correct/ideal. it needs further attention.
2011-09-27fix missing va_end in prctl syscall wrapperRich Felker-0/+1
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