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Rich Felker [Fri, 9 Mar 2012 08:39:28 +0000 (03:39 -0500)]
add .gitignore file
I've had this around for a long time but somehow it never got
committed.
Rich Felker [Sat, 3 Mar 2012 03:35:37 +0000 (22:35 -0500)]
fix nan/infinity macros in math.h, etc.
the previous version not only failed to work in c++, but also failed
to produce constant expressions, making the macros useless as
initializers for objects of static storage duration.
gcc 3.3 and later have builtins for these, which sadly seem to be the
most "portable" solution. the alternative definitions produce
exceptions (for NAN) and compiler warnings (for INFINITY) on newer
versions of gcc.
Rich Felker [Fri, 2 Mar 2012 17:48:17 +0000 (12:48 -0500)]
fix obscure bug in strtoull reading the highest 16 possible values
Rich Felker [Fri, 2 Mar 2012 16:38:39 +0000 (11:38 -0500)]
typo in math.h c version check
Rich Felker [Fri, 2 Mar 2012 05:36:26 +0000 (00:36 -0500)]
make math.h compatibe with c89
Rich Felker [Fri, 2 Mar 2012 05:24:49 +0000 (00:24 -0500)]
remove debug cruft that was left in getdate
Rich Felker [Fri, 2 Mar 2012 05:24:17 +0000 (00:24 -0500)]
first try at implementing getdate function
Rich Felker [Fri, 2 Mar 2012 05:23:43 +0000 (00:23 -0500)]
fix bugs in strptime handling of string day/month names, literals
Rich Felker [Fri, 2 Mar 2012 04:43:31 +0000 (23:43 -0500)]
implement a64l and l64a (legacy xsi stuff)
Rich Felker [Fri, 2 Mar 2012 04:24:45 +0000 (23:24 -0500)]
add all missing wchar functions except floating point parsers
these are mostly untested and adapted directly from corresponding byte
string functions and similar.
Rich Felker [Fri, 2 Mar 2012 03:08:05 +0000 (22:08 -0500)]
support null buffer argument to getcwd, auto-allocating behavior
this is a popular extension some programs depend on, and by using a
temporary buffer and strdup rather than malloc prior to the syscall,
i've avoided the dependency on free and thus minimized the bloat cost
of supporting this feature.
Rich Felker [Thu, 1 Mar 2012 06:34:58 +0000 (01:34 -0500)]
add memory.h, bogus legacy alias for string.h
Rich Felker [Thu, 1 Mar 2012 05:21:20 +0000 (00:21 -0500)]
search internal headers first
this is necessitated by the ugly <syscall.h> just added
Rich Felker [Thu, 1 Mar 2012 03:55:08 +0000 (22:55 -0500)]
use c++-friendly initializers for pthread initializer definitions
these will also avoid obnoxious warnings with gcc -Wbraces.
Rich Felker [Thu, 1 Mar 2012 03:36:06 +0000 (22:36 -0500)]
add <syscall.h> as an alias for <sys/syscall.h>
apparently some broken stuff (libstdc++) needs this.
Rich Felker [Tue, 28 Feb 2012 20:59:01 +0000 (15:59 -0500)]
implement wcsftime function
Rich Felker [Tue, 28 Feb 2012 16:56:13 +0000 (11:56 -0500)]
release notes for 0.8.6
Rich Felker [Tue, 28 Feb 2012 15:13:35 +0000 (10:13 -0500)]
fix pthread_cleanup_pop(1) crash in non-thread-capable, static-linked programs
Rich Felker [Tue, 28 Feb 2012 01:12:06 +0000 (20:12 -0500)]
update release notes for 0.8.5
Rich Felker [Mon, 27 Feb 2012 23:51:02 +0000 (18:51 -0500)]
work around "signal loses thread pointer" issue with "approach 2"
this was discussed on the mailing list and no consensus on the
preferred solution was reached, so in anticipation of a release, i'm
just committing a minimally-invasive solution that avoids the problem
by ensuring that multi-threaded-capable programs will always have
initialized the thread pointer before any signal handler can run.
in the long term we may switch to initializing the thread pointer at
program start time whenever the program has the potential to access
any per-thread data.
Rich Felker [Sat, 25 Feb 2012 07:52:18 +0000 (02:52 -0500)]
use __attribute__((const)) on arm __pthread_self function
Rich Felker [Sat, 25 Feb 2012 04:23:47 +0000 (23:23 -0500)]
replace prototype for basename in string.h with non-prototype declaration
GNU programs may expect the GNU version of basename, which has a
different prototype (argument is const-qualified) and prototype it
themselves too. of course if they're expecting the GNU behavior for
the function, they'll still run into problems, but at least this
eliminates some compile-time failures.
Rich Felker [Sat, 25 Feb 2012 01:07:21 +0000 (20:07 -0500)]
new attempt at working around the gcc 3 visibility bug
since gcc is failing to generate the necessary ".hidden" directive in
the output asm, generate it explicitly with an __asm__ statement...
Rich Felker [Sat, 25 Feb 2012 01:02:42 +0000 (20:02 -0500)]
remove useless attribute visibility from definitions
this was a failed attempt at working around the gcc 3 visibility bug
affecting x86_64. subsequent patch will address it with an ugly but
working hack.
Rich Felker [Fri, 24 Feb 2012 02:24:56 +0000 (21:24 -0500)]
cleanup and work around visibility bug in gcc 3 that affects x86_64
in gcc 3, the visibility attribute must be placed on both the
declaration and on the definition. if it's omitted from the
definition, the compiler fails to emit the ".hidden" directive in the
assembly, and the linker will either generate textrels (if supported,
such as on i386) or refuse to link (on targets where certain types of
textrels are forbidden or impossible without further assumptions about
memory layout, such as on x86_64).
this patch also unifies the decision about when to use visibility into
libc.h and makes the visibility in the utf-8 state machine tables
based on libc.h rather than a duplicate test.
Rich Felker [Thu, 23 Feb 2012 18:08:47 +0000 (13:08 -0500)]
fix (hopefully) PTRACE_TRACEME (command 0) argument handling
Rich Felker [Thu, 23 Feb 2012 18:07:20 +0000 (13:07 -0500)]
fix for previous incorrect fix of cancellation in dns lookups
uninitialized file descriptor was being closed on return, causing
stdin to be closed in many cases.
Rich Felker [Sat, 18 Feb 2012 04:56:28 +0000 (23:56 -0500)]
fix get_current_dir_name behavior
Rich Felker [Sat, 18 Feb 2012 04:51:23 +0000 (23:51 -0500)]
remove -std=gnu99 from musl-gcc wrapper
while probably desirable, changing the default language variant is
outside the scope of the wrapper's responsibility.
Rich Felker [Sat, 18 Feb 2012 04:17:48 +0000 (23:17 -0500)]
two fixes for "make install" handling of shared libs
1. don't try to install (and thus build) shared libs when they were
disabled in config.mak
2. ensure that the path for the dynamic linker exists before
attempting to install it.
Rich Felker [Sat, 18 Feb 2012 04:10:00 +0000 (23:10 -0500)]
add get_current_dir_name function
Rich Felker [Thu, 16 Feb 2012 02:47:55 +0000 (21:47 -0500)]
add float_t and double_t to math.h
Rich Felker [Sat, 11 Feb 2012 05:06:32 +0000 (00:06 -0500)]
fix default nameserver when resolv.conf doesn't exist
Rich Felker [Sat, 11 Feb 2012 05:05:58 +0000 (00:05 -0500)]
fix illegal goto out of cleanup context in dns lookups
Rich Felker [Fri, 10 Feb 2012 02:24:56 +0000 (21:24 -0500)]
small fix for new pthread cleanup stuff
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.
Rich Felker [Thu, 9 Feb 2012 07:33:08 +0000 (02:33 -0500)]
replace bad cancellation cleanup abi with a sane one
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.
Rich Felker [Thu, 9 Feb 2012 05:27:19 +0000 (00:27 -0500)]
document iswspace and remove wrongly-included zwsp character
Rich Felker [Thu, 9 Feb 2012 05:20:24 +0000 (00:20 -0500)]
fix typo in iswspace space list table
Rich Felker [Wed, 8 Feb 2012 03:48:58 +0000 (22:48 -0500)]
fix typo in inotify.h
Rich Felker [Wed, 8 Feb 2012 01:31:27 +0000 (20:31 -0500)]
protect against cancellation in dlopen
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.
Rich Felker [Wed, 8 Feb 2012 01:29:29 +0000 (20:29 -0500)]
reduce some wasted space in dso structure
Rich Felker [Tue, 7 Feb 2012 18:10:30 +0000 (13:10 -0500)]
declare basename in string.h when _GNU_SOURCE is defined
note that it still will have the standards-conformant behavior, not
the GNU behavior. but at least this prevents broken code from ending
up with truncated pointers due to implicit declarations...
Rich Felker [Tue, 7 Feb 2012 17:08:27 +0000 (12:08 -0500)]
revert hacks for types of stdint.h integer constant macros
per 7.18.4: Each invocation of one of these macros shall expand to an
integer constant expression suitable for use in #if preprocessing
directives. The type of the expression shall have the same type as
would an expression of the corresponding type converted according to
the integer promotions. The value of the expression shall be that of
the argument.
the key phrase is "converted according to the integer promotions".
thus there is no intent or allowance that the expression have
smaller-than-int types.
Rich Felker [Tue, 7 Feb 2012 02:51:02 +0000 (21:51 -0500)]
more locale_t interfaces (string stuff) and header updates
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).
Rich Felker [Tue, 7 Feb 2012 02:33:40 +0000 (21:33 -0500)]
fix some omissions and mistakes in locale_t interface definitions
Rich Felker [Tue, 7 Feb 2012 02:29:31 +0000 (21:29 -0500)]
add more of the locale_t interfaces, all dummied out to ignore the locale
Rich Felker [Mon, 6 Feb 2012 23:23:11 +0000 (18:23 -0500)]
x86_64 vfork implementation
untested; should work.
Rich Felker [Mon, 6 Feb 2012 22:57:29 +0000 (17:57 -0500)]
run ctors/dtors for shared objects loaded with dlopen
Rich Felker [Mon, 6 Feb 2012 19:39:09 +0000 (14:39 -0500)]
add support for init/finit (constructors and destructors)
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.
Rich Felker [Mon, 6 Feb 2012 06:14:23 +0000 (01:14 -0500)]
add deprecated (removed from posix) [efg]cvt() functions
these have not been heavily tested, but they should work as described
in the old standards. probably broken for non-finite values...
Rich Felker [Fri, 3 Feb 2012 08:16:07 +0000 (03:16 -0500)]
include dummied-out dlopen and dlsym functions for static binaries
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...
Rich Felker [Fri, 3 Feb 2012 04:54:46 +0000 (23:54 -0500)]
improve gcc wrapper to support -nostdlib, -nostartfiles
Rich Felker [Thu, 2 Feb 2012 05:11:29 +0000 (00:11 -0500)]
make stdio open, read, and write operations cancellation points
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.
Rich Felker [Thu, 2 Feb 2012 04:51:19 +0000 (23:51 -0500)]
make passwd/group functions safe against cancellation in stdio
these changes are a prerequisite to making stdio cancellable.
Rich Felker [Wed, 1 Feb 2012 19:12:19 +0000 (14:12 -0500)]
apparently gnu caddr_t is supposed to be char *, not unsigned long
this type should never be used anyway, but some old junk uses it..
Rich Felker [Wed, 1 Feb 2012 19:10:38 +0000 (14:10 -0500)]
fix utmp.h mess, try 2
Rich Felker [Tue, 31 Jan 2012 22:10:02 +0000 (17:10 -0500)]
fix previous utmp.h junk commit
Rich Felker [Tue, 31 Jan 2012 19:39:17 +0000 (14:39 -0500)]
add some missing junk in utmp.h
Rich Felker [Sun, 29 Jan 2012 16:54:18 +0000 (11:54 -0500)]
add fgetpwent (nonstandard function)
based on patch by Jeremy Huntwork
Rich Felker [Sun, 29 Jan 2012 02:09:50 +0000 (21:09 -0500)]
add linux setfs[ug]id syscall wrappers
patch by Jeremy Huntwork
Rich Felker [Thu, 26 Jan 2012 15:53:37 +0000 (10:53 -0500)]
remove useless "extern" keywords in headers
Rich Felker [Wed, 25 Jan 2012 20:30:42 +0000 (15:30 -0500)]
fix typo in FPE_FLTUND definition, signal.h
Rich Felker [Wed, 25 Jan 2012 03:51:27 +0000 (22:51 -0500)]
add MIN/MAX macros to sys/param.h
this is a nonstandard junk header anyway, so just do what apps expect..
Rich Felker [Wed, 25 Jan 2012 00:50:44 +0000 (19:50 -0500)]
add legacy futimes and lutimes functions
based on patch by sh4rm4. these functions are deprecated; futimens and
utimensat should be used instead in new programs.
Rich Felker [Tue, 24 Jan 2012 05:22:27 +0000 (00:22 -0500)]
make gcc wrapper support -shared correctly
it was previously attempting to link start files as part of shared
objects. this is definitely wrong and depending on the platform and
linker could range from just adding extraneous junk to introducing
textrels to making linking fail entirely.
Rich Felker [Tue, 24 Jan 2012 00:51:34 +0000 (19:51 -0500)]
make glob mark symlinks-to-directories with the GLOB_MARK flag
POSIX is unclear on whether it should, but all historical
implementations seem to behave this way, and it seems more useful to
applications.
Rich Felker [Mon, 23 Jan 2012 23:32:40 +0000 (18:32 -0500)]
fix broken copy relocations from dynamic linker cleanup
this issue affected programs which use global variables exported by
non-libc libraries.
Rich Felker [Mon, 23 Jan 2012 07:02:59 +0000 (02:02 -0500)]
dynamic linker support for PIE binaries (position-independent main program)
even with this change, PIE will not work yet due to deficiencies in
the crt1.o startup code.
Rich Felker [Mon, 23 Jan 2012 05:57:38 +0000 (00:57 -0500)]
cleanup dynamic linker, removing some code duplication
Rich Felker [Mon, 23 Jan 2012 05:37:45 +0000 (00:37 -0500)]
update release notes for 0.8.4
Rich Felker [Sun, 22 Jan 2012 22:19:37 +0000 (17:19 -0500)]
fix cancellation failure in single-threaded programs
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.
Rich Felker [Sun, 22 Jan 2012 20:49:42 +0000 (15:49 -0500)]
support GLOB_PERIOD flag (GNU extension) to glob function
patch by sh4rm4
Rich Felker [Sun, 22 Jan 2012 16:37:27 +0000 (11:37 -0500)]
update WHATSNEW in preparation for 0.8.4 (not finished)
Rich Felker [Sat, 21 Jan 2012 03:30:52 +0000 (22:30 -0500)]
use prlimit syscall for getrlimit/setrlimit
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.
Rich Felker [Sat, 21 Jan 2012 03:10:47 +0000 (22:10 -0500)]
add prlimit syscall wrapper
Rich Felker [Fri, 20 Jan 2012 16:14:27 +0000 (11:14 -0500)]
fix dynamic linker not to depend on DYNAMIC ptr in 0th entry of GOT
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.
Rich Felker [Thu, 19 Jan 2012 04:28:48 +0000 (23:28 -0500)]
alias basename to glibc name for it, to meet abi goals
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.
Rich Felker [Tue, 17 Jan 2012 05:34:58 +0000 (00:34 -0500)]
fix char signedness bug in dynlinker hash function
this only affects non-ascii symbol names, which are probably not in
use anyway..
Rich Felker [Sat, 24 Dec 2011 00:13:48 +0000 (19:13 -0500)]
fix broken reboot wrapper (syscall needs extra silly magic arguments...)
Rich Felker [Thu, 17 Nov 2011 04:59:28 +0000 (23:59 -0500)]
fix issue with excessive mremap syscalls on realloc
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.
Rich Felker [Fri, 11 Nov 2011 02:01:24 +0000 (21:01 -0500)]
fix __cplusplus extern "C" closing brace in pty.h (typo?)
Rich Felker [Fri, 11 Nov 2011 01:44:44 +0000 (20:44 -0500)]
fix signed overflows at most-negative values in ato(i|l|ll)
patch by Pascal Cuoq (with minor tweaks to comments)
Rich Felker [Fri, 11 Nov 2011 01:40:06 +0000 (20:40 -0500)]
fix all missing instances of __cplusplus checks/extern "C" in headers
patch by Arvid Picciani (aep)
Rich Felker [Wed, 26 Oct 2011 04:28:47 +0000 (00:28 -0400)]
report sem value overflows in sem_post
this is not required by the standard, but it's nicer than corrupting
the state and rather inexpensive.
Rich Felker [Mon, 17 Oct 2011 16:24:23 +0000 (12:24 -0400)]
add some missing GNU FNM_* extensions to the header
note that none of these are implemented, and programs depending on
them may break... patch by sh4rm4
Rich Felker [Mon, 17 Oct 2011 16:23:04 +0000 (12:23 -0400)]
fix some details in ugly stuff that doesn't belong in libc
patches by sh4rm4, presumably needed to make gdb or some similar junk
happy...
Rich Felker [Sat, 15 Oct 2011 04:28:49 +0000 (00:28 -0400)]
don't define wchar_t on c++
it's a keyword in c++ (wtf). i'm not sure this is the cleanest
solution; it might be better to avoid ever defining __NEED_wchar_t on
c++. but in any case, this works for now.
Rich Felker [Sat, 15 Oct 2011 03:56:31 +0000 (23:56 -0400)]
support vfork on i386
Rich Felker [Sat, 15 Oct 2011 03:34:12 +0000 (23:34 -0400)]
make available a namespace-safe vfork, if supported
this may be useful to posix_spawn..?
Rich Felker [Sat, 15 Oct 2011 03:31:04 +0000 (23:31 -0400)]
add dummy __cxa_finalize
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..
Rich Felker [Sat, 15 Oct 2011 03:21:54 +0000 (23:21 -0400)]
support __cxa_atexit, and registering atexit functions from atexit handlers
mildly tested; may have bugs. the locking should be updated not to use
spinlocks but that's outside the scope of this one module.
Rich Felker [Sat, 15 Oct 2011 03:00:24 +0000 (23:00 -0400)]
simplify atexit and fflush-on-exit handling
Rich Felker [Mon, 10 Oct 2011 02:51:03 +0000 (22:51 -0400)]
fix F_GETOWN return value handling
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.
Rich Felker [Sun, 9 Oct 2011 04:02:39 +0000 (00:02 -0400)]
fix typo in arm clone() asm
Rich Felker [Wed, 5 Oct 2011 04:26:49 +0000 (00:26 -0400)]
fix fcntl O_* flags for arm
no idea why these 4 are permuted and the rest are standard/generic
Rich Felker [Tue, 4 Oct 2011 15:50:35 +0000 (11:50 -0400)]
make [U]INTn_C() macros have the right type...
...and still be valid in #if directives.
Rich Felker [Mon, 3 Oct 2011 04:27:47 +0000 (00:27 -0400)]
recovering ownerdead robust mutex must reset recursive lock count
Rich Felker [Mon, 3 Oct 2011 04:19:05 +0000 (00:19 -0400)]
simplify robust mutex unlock code path
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.
Rich Felker [Mon, 3 Oct 2011 04:11:16 +0000 (00:11 -0400)]
fix crash if pthread_mutex_unlock is called without ever locking
this is valid for error-checking mutexes; otherwise it invokes UB and
would be justified in crashing.
Rich Felker [Mon, 3 Oct 2011 04:09:08 +0000 (00:09 -0400)]
use count=0 instead of 1 for recursive mutex with only one lock reference
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.