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Rich Felker [Thu, 4 Apr 2013 18:55:42 +0000 (14:55 -0400)]
cleanup wcstombs
remove redundant headers and comments; this file is completely trivial
now. also, avoid temp var.
Rich Felker [Thu, 4 Apr 2013 18:53:53 +0000 (14:53 -0400)]
cleanup mbstowcs wrapper
remove unneeded headers. this file is utterly trivial now and there's
no sense in having a comment to state that it's in the public domain.
Rich Felker [Thu, 4 Apr 2013 18:51:05 +0000 (14:51 -0400)]
minor optimization to mbstowcs
there is no need to zero-fill an mbstate_t object in the caller;
mbsrtowcs will automatically treat a null pointer as the initial
state.
Rich Felker [Thu, 4 Apr 2013 18:48:48 +0000 (14:48 -0400)]
fix incorrect range checks in wcsrtombs
negative values of wchar_t need to be treated in the non-ASCII case so
that they can properly generate EILSEQ rather than getting truncated
to 8bit values and stored in the output.
Rich Felker [Thu, 4 Apr 2013 18:42:35 +0000 (14:42 -0400)]
overhaul mbsrtowcs
these changes fix at least two bugs:
- misaligned access to the input as uint32_t for vectorized ASCII test
- incorrect src pointer after stopping on EILSEQ
in addition, the text of the standard makes it unclear whether the
mbstate_t object is to be modified when the destination pointer is
null; previously it was cleared either way; now, it's only cleared
when the destination is non-null. this change may need revisiting, but
it should not affect most applications, since calling mbsrtowcs with
non-zero state can only happen when the head of the string was already
processed with mbrtowc.
finally, these changes shave about 20% size off the function and seem
to improve performance by 1-5%.
rofl0r [Tue, 2 Apr 2013 02:38:23 +0000 (04:38 +0200)]
re-add useconds_t
this type was removed back in
5243e5f1606a9c6fcf01414e ,
because it was removed from the XSI specs.
however some apps use it.
since it's in the POSIX reserved namespace, we can expose it
unconditionally.
rofl0r [Tue, 2 Apr 2013 00:51:40 +0000 (02:51 +0200)]
add arpa/nameser_compat.h
the contents of this header are already in arpa/nameser.h
rofl0r [Tue, 2 Apr 2013 00:48:39 +0000 (02:48 +0200)]
make tm_zone etc visible under _GNU_SOURCE
rofl0r [Tue, 2 Apr 2013 00:47:07 +0000 (02:47 +0200)]
__time_to_tm: initialize tm_zone and tm_gmtoff
Szabolcs Nagy [Mon, 1 Apr 2013 18:02:32 +0000 (18:02 +0000)]
add syscall numbers for the new kcmp and finit_module syscalls
and remove syscall todos from microblaze
Szabolcs Nagy [Mon, 1 Apr 2013 17:54:39 +0000 (17:54 +0000)]
add the new SO_REUSEPORT socket option to mips and powerpc
SO_REUSEPORT implementation was merged in the linux kernel commit
c617f398edd4db2b8567a28e899a88f8f574798d 2013-01-23
Szabolcs Nagy [Sat, 23 Mar 2013 19:58:33 +0000 (19:58 +0000)]
add new socket options to sys/socket.h following linux
Szabolcs Nagy [Sat, 23 Mar 2013 19:55:23 +0000 (19:55 +0000)]
adding ethernet protocol ids to if_ether.h following linux
Szabolcs Nagy [Sat, 23 Mar 2013 19:51:34 +0000 (19:51 +0000)]
add ADJ_SETOFFSET timex mode bit (new in linux v2.6.39)
Szabolcs Nagy [Sat, 23 Mar 2013 19:49:38 +0000 (19:49 +0000)]
add new linux tcp socket option flags to netinet/tcp.h
Rich Felker [Mon, 1 Apr 2013 15:20:12 +0000 (11:20 -0400)]
fix typo in setpriority syscall wrapper
Rich Felker [Mon, 1 Apr 2013 03:27:57 +0000 (23:27 -0400)]
provide prototype for pthread_getattr_np
Rich Felker [Mon, 1 Apr 2013 03:25:55 +0000 (23:25 -0400)]
implement pthread_getattr_np
this function is mainly (purely?) for obtaining stack address
information, but we also provide the detach state since it's easy to
do anyway.
Rich Felker [Wed, 27 Mar 2013 03:07:31 +0000 (23:07 -0400)]
remove __SYSCALL_SSLEN arch macro in favor of using public _NSIG
the issue at hand is that many syscalls require as an argument the
kernel-ABI size of sigset_t, intended to allow the kernel to switch to
a larger sigset_t in the future. previously, each arch was defining
this size in syscall_arch.h, which was redundant with the definition
of _NSIG in bits/signal.h. as it's used in some not-quite-portable
application code as well, _NSIG is much more likely to be recognized
and understood immediately by someone reading the code, and it's also
shorter and less cluttered.
note that _NSIG is actually 65/129, not 64/128, but the division takes
care of throwing away the off-by-one part.
Rich Felker [Wed, 27 Mar 2013 02:54:57 +0000 (22:54 -0400)]
provide emulation of fcntl F_DUPFD_CLOEXEC on old kernels
I'm not entirely happy with the amount of ugliness here, but since
F_DUPFD_CLOEXEC is used elsewhere in code that's expected to work on
old kernels (popen), it seems necessary. reportedly even some modern
kernels went back and broke F_DUPFD_CLOEXEC (making it behave like
plain F_DUPFD), so it might be necessary to add some additional fixup
code later to deal with that issue too.
Rich Felker [Mon, 25 Mar 2013 15:34:22 +0000 (11:34 -0400)]
in pipe2, use pipe() rather than __syscall(SYS_pipe, ...) for fallback
SYS_pipe is not usable directly in general, since mips has a very
broken calling convention for the pipe syscall. instead, just call the
function, so that the mips-specific ugliness is isolated in
mips/pipe.s and not copied elsewhere.
Rich Felker [Mon, 25 Mar 2013 02:41:38 +0000 (22:41 -0400)]
rewrite popen to use posix_spawn instead of fragile vfork hacks
Rich Felker [Mon, 25 Mar 2013 02:40:54 +0000 (22:40 -0400)]
remove cruft from pre-posix_spawn version of the system function
Rich Felker [Sun, 24 Mar 2013 00:02:31 +0000 (20:02 -0400)]
add deprecated SIGIOT alias for SIGABRT
reportedly some programs (e.g. showkeys in the kbd package) use it.
Rich Felker [Sat, 23 Mar 2013 22:59:30 +0000 (18:59 -0400)]
fix multiple bugs in syslog interfaces
1. as reported by William Haddon, the value returned by snprintf was
wrongly used as a length passed to sendto, despite it possibly
exceeding the buffer length. this could lead to invalid reads and
leaking additional data to syslog.
2. openlog was storing a pointer to the ident string passed by the
caller, rather than copying it. this bug is shared with (and even
documented in) other implementations like glibc, but such behavior
does not seem to meet the requirements of the standard.
3. extremely long ident provided to openlog, or corrupt ident due to
the above issue, could possibly have resulted in buffer overflows.
despite having the potential for smashing the stack, i believe the
impact is low since ident points to a short string literal in typical
application usage (and per the above bug, other usages will break
horribly on other implementations).
4. when used with LOG_NDELAY, openlog was not connecting the
newly-opened socket; sendto was being used instead. this defeated the
main purpose of LOG_NDELAY: preparing for chroot.
5. the default facility was not being used at all, so all messages
without an explicit facility passed to syslog were getting logged at
the kernel facility.
6. setlogmask was not thread-safe; no synchronization was performed
updating the mask. the fix uses atomics rather than locking to avoid
introducing a lock in the fast path for messages whose priority is not
in the mask.
7. in some code paths, the syslog lock was being unlocked twice; this
could result in releasing a lock that was actually held by a different
thread.
some additional enhancements to syslog such as a default identifier
based on argv[0] or similar may still be desired; at this time, only
the above-listed bugs have been fixed.
Rich Felker [Sun, 10 Mar 2013 03:34:11 +0000 (22:34 -0500)]
remove soname from libc.so/ld-musl
it serves no purpose (binaries linked against musl as -lc/libc.so
automatically get the right DT_NEEDED value of libc.so) and causes
ldconfig to misbehave (making a symlink to ld-musl named libc.so in
/lib). ldconfig is not used on pure musl systems, but if ld-musl is
installed on a system where it's not the primary libc, this will
pollute the system /lib with a symlink to musl named libc.so, which
should NOT exist and could cause problems linking native apps. also,
the existence of the soname caused spurious warnings from ldconfig
when /lib and /usr/lib were the same physical directory.
Rich Felker [Thu, 7 Mar 2013 04:57:39 +0000 (23:57 -0500)]
fix epoll structure alignment on non-x86_64 archs
this fix is far from ideal and breaks the rule of not using
arch-specific #ifdefs, but for now we just need a solution to the
existing breakage.
the underlying problem is that the kernel folks made a very stupid
decision to make misalignment of this struct part of the kernel
API/ABI for x86_64, in order to avoid writing a few extra lines of
code to handle both 32- and 64-bit userspace on 64-bit kernels. I had
just added the packed attribute unconditionally thinking it was
harmless on 32-bit archs, but non-x86 32-bit archs have 8-byte
alignment on 64-bit types.
Rich Felker [Wed, 6 Mar 2013 14:32:52 +0000 (09:32 -0500)]
fix missing type error in grp.h from adding fgetgrent
Rich Felker [Tue, 5 Mar 2013 00:22:14 +0000 (19:22 -0500)]
fix types for wctype_t and wctrans_t
wctype_t was incorrectly "int" rather than "long" on x86_64. not only
is this an ABI incompatibility; it's also a major design flaw if we
ever wanted wctype_t to be implemented as a pointer, which would be
necessary if locales support custom character classes, since int is
too small to store a converted pointer. this commit fixes wctype_t to
be unsigned long on all archs, matching the LSB ABI; this change does
not matter for C code, but for C++ it affects mangling.
the same issue applied to wctrans_t. glibc/LSB defines this type as
const __int32_t *, but since no such definition is visible, I've just
expanded the definition, int, everywhere.
it would be nice if these types (which don't vary by arch) could be in
wctype.h, but the OB XSI requirement in POSIX that wchar.h expose some
types and functions from wctype.h precludes doing so. glibc works
around this with some hideous hacks, but trying to duplicate that
would go against the intent of musl's headers.
Rich Felker [Mon, 4 Mar 2013 22:05:45 +0000 (17:05 -0500)]
fix some obscure header type size/alignment issues
Rich Felker [Tue, 26 Feb 2013 13:54:31 +0000 (08:54 -0500)]
fix wrong float_t on x86_64
x86_64 does not have excess precision, at all
Rich Felker [Tue, 26 Feb 2013 06:46:39 +0000 (01:46 -0500)]
fix cruft in utmp.h that was broken by changes in utmpx.h
patch by Chris Spiegel.
Rich Felker [Tue, 26 Feb 2013 06:42:11 +0000 (01:42 -0500)]
fix integer type issue in strverscmp
lenl-lenr is not a valid expression for a signed int return value from
strverscmp, since after implicit conversion from size_t to int this
difference could have the wrong sign or might even be zero. using the
difference for char values works since they're bounded well within the
range of differences representable by int, but it does not work for
size_t values.
Rich Felker [Tue, 26 Feb 2013 06:36:47 +0000 (01:36 -0500)]
implement non-stub strverscmp
patch by Isaac Dunham.
Rich Felker [Tue, 26 Feb 2013 06:30:36 +0000 (01:30 -0500)]
namespace conformance to latest standards in strings.h
Rich Felker [Fri, 22 Feb 2013 04:54:25 +0000 (23:54 -0500)]
replace stub with working strcasestr
Rich Felker [Fri, 22 Feb 2013 04:19:18 +0000 (23:19 -0500)]
fix wrong return value from wmemmove on forward copies
rofl0r [Thu, 21 Feb 2013 14:40:08 +0000 (15:40 +0100)]
scsci/sg.h: fix usage of undefined macro HZ
this macro is 100 on all archs, at least in userspace, according
to kernel headers.
rofl0r [Thu, 21 Feb 2013 14:35:34 +0000 (15:35 +0100)]
add arpa/ftp.h
Rich Felker [Thu, 21 Feb 2013 04:01:22 +0000 (23:01 -0500)]
use memcmp instead of str[n]cmp for temp function XXXXXX checking
Rich Felker [Thu, 21 Feb 2013 03:58:46 +0000 (22:58 -0500)]
fix error cases in mkostemps core
1. wrong return value and missing errno for negative suffix len
2. failure to catch suffix len > strlen
3. remove unwanted clearing of input string in invalid case
Rich Felker [Thu, 21 Feb 2013 03:56:53 +0000 (22:56 -0500)]
remove leftover unused variable in mktemp after refactoring
Rich Felker [Thu, 21 Feb 2013 03:43:23 +0000 (22:43 -0500)]
add mkostemp, mkstemps, and mkostemps functions and reorganize temp internals
based on patch contributed by Anthony G. Basile (blueness)
some issues remain with the filename generation algorithm and other
small bugs, but this patch has been sitting around long enough that I
feel it's best to get it committed and then work out any remaining
issues.
Rich Felker [Sun, 17 Feb 2013 19:30:19 +0000 (14:30 -0500)]
remove unused #undef environ now that libc.h no longer #defines it
Rich Felker [Sun, 17 Feb 2013 19:24:39 +0000 (14:24 -0500)]
consistently use the internal name __environ for environ
patch by Jens Gustedt.
previously, the intended policy was to use __environ in code that must
conform to the ISO C namespace requirements, and environ elsewhere.
this policy was not followed in practice anyway, making things
confusing. on top of that, Jens reported that certain combinations of
link-time optimization options were breaking with the inconsistent
references; this seems to be a compiler or linker bug, but having it
go away is a nice side effect of the changes made here.
Rich Felker [Sun, 17 Feb 2013 18:21:56 +0000 (13:21 -0500)]
add fgetgrent function
based on patch by Isaac Dunham, moved to its own file to avoid
increasing bss on static linked programs not using this nonstandard
function but using the standard getgrent function, and vice versa.
Rich Felker [Thu, 7 Feb 2013 08:13:35 +0000 (03:13 -0500)]
fix typo in newly-added error message for EOWNERDEAD
Rich Felker [Thu, 7 Feb 2013 08:05:54 +0000 (03:05 -0500)]
improve error strings
this definitely has the potential to be a bikeshed topic, so some
justification is in order. most of the changes made fit into one of
the following categories:
1. alignment with text in posix, xsh 2.3
2. eliminating overly-specific text for shared error codes
3. making the message match more closely with the macro name
4. removing extraneous words
in particular, the EAGAIN/EWOULDBLOCK text is updated to match the
description of EAGAIN (which covers both uses) rather than saying the
operation would block, and ENOTSUP/EOPNOTSUPP is updated not to
mention sockets.
the distinction between ENFILE/EMFILE has also been clarified; ENFILE
is aligned with the posix text, and EMFILE, which lacks concise posix
text matching any historic message, is updated to emphasize that the
exhausted resource is not open files/open file descriptions, but
rather the integer 'address space' of file descriptors.
some messages may be further tweaked based on feedback.
rofl0r [Wed, 6 Feb 2013 01:15:51 +0000 (02:15 +0100)]
arm: add __aeabi_atexit()
arm eabi requires this symbol for static C++ dtors.
usually it is provided by libstdc++, but when a C++ program
doesn't use the std lib (free-standing), the libc has to provide
it.
this was encountered while building transmission, which
depends on such a C++ library (libutp).
this function is nearly identical to __cxa_atexit, but it has the
order of argumens swapped for "performance reasons".
see page 25 of
http://infocenter.arm.com/help/topic/com.arm.doc.ihi0043d/IHI0043D_rtabi.pdf
there are other aeabi specific C++ support functions missing, but
it is not clear yet that GCC makes use of them so we omit them for
the moment.
rofl0r [Wed, 6 Feb 2013 01:11:49 +0000 (02:11 +0100)]
Makefile: make it possible to build arch specific C files
Rich Felker [Sun, 3 Feb 2013 23:21:04 +0000 (18:21 -0500)]
base system() on posix_spawn
this avoids duplicating the fragile logic for executing an external
program without fork.
Rich Felker [Sun, 3 Feb 2013 22:09:47 +0000 (17:09 -0500)]
fix unsigned comparison bug in posix_spawn
read should never return anything but 0 or sizeof ec here, but if it
does, we want to treat any other return as "success". then the caller
will get back the pid and is responsible for waiting on it when it
immediately exits.
Rich Felker [Sun, 3 Feb 2013 21:42:40 +0000 (16:42 -0500)]
overhaul posix_spawn to use CLONE_VM instead of vfork
the proposed change was described in detail in detail previously on
the mailing list. in short, vfork is unsafe because:
1. the compiler could make optimizations that cause the child to
clobber the parent's local vars.
2. strace is buggy and allows the vforking parent to run before the
child execs when run under strace.
the new design uses a close-on-exec pipe instead of vfork semantics to
synchronize the parent and child so that the parent does not return
before the child has finished using its arguments (and now, also its
stack). this also allows reporting exec failures to the caller instead
of giving the caller a child that mysteriously exits with status 127
on exec error.
basic testing has been performed on both the success and failure code
paths. further testing should be done.
Rich Felker [Sun, 3 Feb 2013 21:09:05 +0000 (16:09 -0500)]
streamline old-kernel fallback path of pipe2 to use syscalls directly
also, don't waste code/time on F_GETFL since pipes always have blank
flags initially (at least on old kernels, which are all this fallback
code matters for).
Rich Felker [Sun, 3 Feb 2013 06:26:33 +0000 (01:26 -0500)]
fix regression that made shared libs crash on arm
Rich Felker [Sat, 2 Feb 2013 07:07:38 +0000 (02:07 -0500)]
dynamically allocate storage for gethostby* buffers
this change shaves ~1k off libc.so bss size, and also avoids hard
errors in the case where the static buffer was not large enough to
hold the result.
this whole framework is really ugly and might should be replaced or at
least heavily overhauled when some changes/factorizations are made to
getaddrinfo internals in the future.
Rich Felker [Sat, 2 Feb 2013 06:59:53 +0000 (01:59 -0500)]
fix blank ai_canonname from getaddrinfo for non-CNAMEs
Rich Felker [Sat, 2 Feb 2013 06:32:12 +0000 (01:32 -0500)]
fix memory leak due to double call to getaddrinfo in gethostbyname*
Rich Felker [Sat, 2 Feb 2013 06:31:10 +0000 (01:31 -0500)]
fix error returns in gethostby*_r functions
they're supposed to return an error code rather than using errno.
Rich Felker [Sat, 2 Feb 2013 05:59:25 +0000 (00:59 -0500)]
fix uninitialized map_len being used in munmap failure paths in load_library
this bug seems to have been introduced when the map_library signatures
was changed to return the mapping in a temp dso structure instead of
into separate variables.
Rich Felker [Sat, 2 Feb 2013 03:25:19 +0000 (22:25 -0500)]
fix stale locks left behind when pthread_create fails
this bug seems to have been around a long time.
Rich Felker [Sat, 2 Feb 2013 03:23:24 +0000 (22:23 -0500)]
if pthread_create fails, it must not attempt mmap if there is no mapping
this bug was introduced when support for application-provided stacks
was originally added.
Rich Felker [Sat, 2 Feb 2013 03:10:40 +0000 (22:10 -0500)]
pthread stack treatment overhaul for application-provided stacks, etc.
the main goal of these changes is to address the case where an
application provides a stack of size N, but TLS has size M that's a
significant portion of the size N (or even larger than N), thus giving
the application less stack space than it expected or no stack at all!
the new strategy pthread_create now uses is to only put TLS on the
application-provided stack if TLS is smaller than 1/8 of the stack
size or 2k, whichever is smaller. this ensures that the application
always has "close enough" to what it requested, and the threshold is
chosen heuristically to make sure "sane" amounts of TLS still end up
in the application-provided stack.
if TLS does not fit the above criteria, pthread_create uses mmap to
obtain space for TLS, but still uses the application-provided stack
for actual call frame stack. this is to avoid wasting memory, and for
the sake of supporting ugly hacks like garbage collection based on
assumptions that the implementation will use the provided stack range.
in order for the above heuristics to ever succeed, the amount of TLS
space wasted on POSIX TSD (pthread_key_create based) needed to be
reduced. otherwise, these changes would preclude any use of
pthread_create without mmap, which would have serious memory usage and
performance costs for applications trying to create huge numbers of
threads using pre-allocated stack space. the new value of
PTHREAD_KEYS_MAX is the minimum allowed by POSIX, 128. this should
still be plenty more than real-world applications need, especially now
that C11/gcc-style TLS is now supported in musl, and most apps and
libraries choose to use that instead of POSIX TSD when available.
at the same time, PTHREAD_STACK_MIN has been decreased. it was
originally set to PAGE_SIZE back when there was no support for TLS or
application-provided stacks, and requests smaller than a whole page
did not make sense. now, there are two good reasons to support
requests smaller than a page: (1) applications could provide
pre-allocated stacks smaller than a page, and (2) with smaller stack
sizes, stack+TLS+TSD can all fit in one page, making it possible for
applications which need huge numbers of threads with minimal stack
needs to allocate exactly one page per thread. the new value of
PTHREAD_STACK_MIN, 2k, is aligned with the minimum size for
sigaltstack.
rofl0r [Sat, 2 Feb 2013 02:08:57 +0000 (03:08 +0100)]
make some arrays const
this way they'll go into .rodata, decreasing memory pressure.
Rich Felker [Fri, 1 Feb 2013 21:41:53 +0000 (16:41 -0500)]
replace __wake function with macro that performs direct syscall
this should generate faster and smaller code, especially with inline
syscalls. the conditional with cnt is ugly, but thankfully cnt is
always a constant anyway so it gets evaluated at compile time. it may
be preferable to make separate __wake and __wakeall macros without a
count argument.
priv flag is not used yet; private futex support still needs to be
done at some point in the future.
Rich Felker [Fri, 1 Feb 2013 20:57:28 +0000 (15:57 -0500)]
fix up minor misplacement of restrict keyword in spawnattr sched stubs
Rich Felker [Fri, 1 Feb 2013 06:49:07 +0000 (01:49 -0500)]
release notes for 0.9.9
Rich Felker [Fri, 1 Feb 2013 06:10:59 +0000 (01:10 -0500)]
revert regex "cleanup" that seems unjustified and may break backtracking
it's not clear to me at the moment whether the code that was removed
(and which is now being re-added) is needed, but it's far from being a
no-op, and i don't want to risk breaking regex in this release.
Rich Felker [Thu, 31 Jan 2013 05:49:53 +0000 (00:49 -0500)]
SOL_TCP is nonstandard and not in the reserved namespace
alternatively, we could define it in sys/socket.h since SO* is
reserved there, and tcp.h includes sys/socket.h in extensions mode.
note that SOL_TCP is simply wrong and it's only here for compatibility
with broken applications. the correct argument to pass for setting TCP
socket options is IPPROTO_TCP, which of course has the same value as
SOL_TCP but works everywhere.
Rich Felker [Sat, 26 Jan 2013 16:40:40 +0000 (11:40 -0500)]
fix tm_to_time logic for number of days in november
report/patch by Hiltjo Posthuma <hiltjo@codemadness.org>
Rich Felker [Thu, 24 Jan 2013 03:18:45 +0000 (22:18 -0500)]
add RTLD_NODELETE flag for dlopen
this is a trivial no-op, because dlclose never deletes libraries. thus
we might as well have it in the header in case some application wants
it, since we're already providing it anyway.
Rich Felker [Thu, 24 Jan 2013 03:07:45 +0000 (22:07 -0500)]
add support for RTLD_NOLOAD to dlopen
based on patch by Pierre Carrier <pierre@gcarrier.fr> that just added
the flag constant, but with minimal additional code so that it
actually works as documented. this is a nonstandard option but some
major software (reportedly, Firefox) uses it and it was easy to add
anyway.
Rich Felker [Thu, 24 Jan 2013 01:21:36 +0000 (20:21 -0500)]
fix regression in dlsym: rejection of special RTLD_* handles as invalid
Rich Felker [Sat, 19 Jan 2013 01:35:26 +0000 (20:35 -0500)]
use a common definition of NULL as 0L for C and C++
the historical mess of having different definitions for C and C++
comes from the historical C definition as (void *)0 and the fact that
(void *)0 can't be used in C++ because it does not convert to other
pointer types implicitly. however, using plain 0 in C++ exposed bugs
in C++ programs that call variadic functions with NULL as an argument
and (wrongly; this is UB) expect it to arrive as a null pointer. on
64-bit machines, the high bits end up containing junk. glibc dodges
the issue by using a GCC extension __null to define NULL; this is
observably non-conforming because a conforming application could
observe the definition of NULL via stringizing and see that it is
neither an integer constant expression with value zero nor such an
expression cast to void.
switching to 0L eliminates the issue and provides compatibility with
broken applications, since on all musl targets, long and pointers have
the same size, representation, and argument-passing convention. we
could maintain separate C and C++ definitions of NULL (i.e. just use
0L on C++ and use (void *)0 on C) but after careful analysis, it seems
extremely difficult for a C program to even determine whether NULL has
integer or pointer type, much less depend in subtle, unintentional
ways, on whether it does. C89 seems to have no way to make the
distinction. on C99, the fact that (int)(void *)0 is not an integer
constant expression, along with subtle VLA/sizeof semantics, can be
used to make the distinction, but many compilers are non-conforming
and give the wrong result to this test anyway. on C11, _Generic can
trivially make the distinction, but it seems unlikely that code
targetting C11 would be so backwards in caring which definition of
NULL an implementation uses.
as such, the simplest path of using the same definition for NULL in
both C and C++ was chosen. the #undef directive was also removed so
that the compiler can catch and give a warning or error on
redefinition if buggy programs have defined their own versions of
NULL prior to inclusion of standard headers.
Rich Felker [Wed, 16 Jan 2013 16:49:00 +0000 (11:49 -0500)]
fix warning building dynlink.c stub for static libc
struct dso was not defined in this case, and it's not needed in the
code that was using it anyway; void pointers work just as well.
Rich Felker [Wed, 16 Jan 2013 16:47:35 +0000 (11:47 -0500)]
fix bug in dladdr that prevented resolving addresses in the PLT
Szabolcs Nagy [Tue, 15 Jan 2013 00:05:29 +0000 (01:05 +0100)]
remove unused "params" related code from regex
some structs and functions had reference to the params
feature of tre that is not used by the code anymore
Rich Felker [Mon, 14 Jan 2013 23:04:49 +0000 (18:04 -0500)]
Merge remote-tracking branch 'nsz/math'
Szabolcs Nagy [Sun, 13 Jan 2013 23:06:49 +0000 (00:06 +0100)]
regex: remove an unused local variable from regexec
pos_start local variable is not used in tre_tnfa_run_backtrack
Szabolcs Nagy [Sun, 13 Jan 2013 22:54:48 +0000 (23:54 +0100)]
in crypt_des change unnecessary union keybuf into unsigned char[]
original FreeSec code accessed keybuf as uint32* and uint8* as well
(incorrectly), this got fixed with an union, but then it seems the
uint32* access is no longer needed so the code can be simplified
Szabolcs Nagy [Sun, 13 Jan 2013 22:18:32 +0000 (23:18 +0100)]
crypt: fix the prototype of md5_sum, sha256_sum and sha512_sum
the internal sha2 hash sum functions had incorrect array size
in the prototype for the message digest argument, fixed by
using pointer so it is not misleading
Szabolcs Nagy [Sun, 13 Jan 2013 22:15:39 +0000 (23:15 +0100)]
fix lio_listio return value in LIO_WAIT mode
Szabolcs Nagy [Sat, 12 Jan 2013 18:14:34 +0000 (19:14 +0100)]
add MOD_TAI to sys/timex.h and update STA_RONLY
Szabolcs Nagy [Sat, 12 Jan 2013 18:13:59 +0000 (19:13 +0100)]
add SWAP_FLAG_DISCARD to sys/swap.h
Szabolcs Nagy [Sat, 12 Jan 2013 17:25:13 +0000 (18:25 +0100)]
add mount flags to sys/mount.h
added various MS_*, MNT_*, UMOUNT_* flags following the linux
headers, with one exception: MS_NOUSER is defined as (1U<<31)
instead of (1<<31) which invokes undefined behaviour
the S_* flags were removed following glibc
Szabolcs Nagy [Sat, 12 Jan 2013 17:24:45 +0000 (18:24 +0100)]
add IN_EXCL_UNLINK to sys/inotify.h
Szabolcs Nagy [Sat, 12 Jan 2013 16:29:45 +0000 (17:29 +0100)]
add EPOLLWAKEUP flag to sys/epoll.h
Szabolcs Nagy [Sat, 12 Jan 2013 14:37:00 +0000 (15:37 +0100)]
add RB_SW_SUSPEND and RB_KEXEC to sys/reboot.h
using the glibc names for the magic constants of the linux reboot syscall
Szabolcs Nagy [Fri, 11 Jan 2013 01:07:40 +0000 (02:07 +0100)]
add missing mmap options and madvices to bits/mman.h based on linux headers
Szabolcs Nagy [Fri, 11 Jan 2013 01:05:19 +0000 (02:05 +0100)]
add missing EXTPROC flag to bits/termios.h
mips and powerpc already had this termios flag defined
Szabolcs Nagy [Fri, 11 Jan 2013 01:03:45 +0000 (02:03 +0100)]
add missing F_GETOWNER_UIDS flag to bits/fcntl.h
Szabolcs Nagy [Fri, 11 Jan 2013 01:00:14 +0000 (02:00 +0100)]
add missing EHWPOISON to bits/errno.h
it was already defined for mips, but was missing from other archs
Szabolcs Nagy [Fri, 11 Jan 2013 00:58:54 +0000 (01:58 +0100)]
add missing ptrace requests and options to sys/ptrace.h
Szabolcs Nagy [Fri, 11 Jan 2013 00:54:53 +0000 (01:54 +0100)]
add missing multicast socket options to netinet/in.h
based on linux headers add the missing MCAST_* options
under _GNU_SOURCE as they are not in the reserved namespace
(this api was originally specified by RFC 3678)
Szabolcs Nagy [Fri, 11 Jan 2013 00:46:09 +0000 (01:46 +0100)]
add missing protocol families to sys/socket.h
missing protocol families based on current linux headers:
PF_RDS, PF_LLC, PF_CAN, PF_TIPC, PF_NFC
Rich Felker [Thu, 10 Jan 2013 22:57:30 +0000 (17:57 -0500)]
fix another case of cloexec/nonblock flags not matching arch values
Rich Felker [Thu, 10 Jan 2013 19:05:40 +0000 (14:05 -0500)]
check for invalid handles in dlsym/dlclose
this is wasteful and useless from a standpoint of sane programs, but
it is required by the standard, and the current requirements were
upheld with the closure of Austin Group issue #639:
http://austingroupbugs.net/view.php?id=639
Szabolcs Nagy [Mon, 7 Jan 2013 22:54:13 +0000 (23:54 +0100)]
math: erf and erfc cleanup
common part of erf and erfc was put in a separate function which
saved some space and the new code is using unsigned arithmetics
erfcf had a bug: for some inputs in [7.95,8] the result had
more than 60ulp error: in expf(-z*z - 0.5625f) the argument
must be exact but not enough lowbits of z were zeroed,
-SET_FLOAT_WORD(z, ix&0xfffff000);
+SET_FLOAT_WORD(z, ix&0xffffe000);
fixed the issue
rofl0r [Fri, 4 Jan 2013 17:47:17 +0000 (18:47 +0100)]
setjmp.h: add struct tag for sigjmp_buf (GCC C++ compatibility)
the anonymous struct typedef with array notation breaks with
GCC in C++ mode:
error: non-local function 'static<anonymous struct>
(& boost::signal_handler::jump_buffer())[1]' uses anonymous type
this is a known GCC issue, as search results for that error msg
suggest.
since this is hard to work around in the calling C++ code, a
fix in musl is preferable.
rofl0r [Fri, 4 Jan 2013 12:05:42 +0000 (13:05 +0100)]
add legacy header values.h
some programs (procps, babl) expect it, and it doesn't seem to
cause any harm to just add it.
it's small and straightforward.
since math.h also defines MAXFLOAT, we undef it in both places,
before defining it.