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Rich Felker [Fri, 7 Sep 2012 03:27:55 +0000 (23:27 -0400)]
fix invalid implicit pointer conversion in gnulib-compat functions
Rich Felker [Fri, 7 Sep 2012 03:12:27 +0000 (23:12 -0400)]
add _Noreturn function attribute, with fallback for pre-C11 GNUC
Rich Felker [Fri, 7 Sep 2012 02:58:34 +0000 (22:58 -0400)]
dladdr should be available under _BSD_SOURCE as well as _GNU_SOURCE
Rich Felker [Fri, 7 Sep 2012 02:44:55 +0000 (22:44 -0400)]
use restrict everywhere it's required by c99 and/or posix 2008
to deal with the fact that the public headers may be used with pre-c99
compilers, __restrict is used in place of restrict, and defined
appropriately for any supported compiler. we also avoid the form
[restrict] since older versions of gcc rejected it due to a bug in the
original c99 standard, and instead use the form *restrict.
Rich Felker [Fri, 7 Sep 2012 00:28:42 +0000 (20:28 -0400)]
remove dependency of wmemmove on wmemcpy direction
unlike the memmove commit, this one should be fine to leave in place.
wmemmove is not performance-critical, and even if it were, it's
already copying whole 32-bit words at a time instead of bytes.
Rich Felker [Fri, 7 Sep 2012 00:25:48 +0000 (20:25 -0400)]
remove dependency of memmove on memcpy direction
this commit introduces a performance regression in many uses of
memmove, which will need to be addressed before the next release. i'm
making it as a temporary measure so that the restrict patch can be
committed without invoking undefined behavior when memmove calls
memcpy with overlapping regions.
Rich Felker [Fri, 7 Sep 2012 00:21:13 +0000 (20:21 -0400)]
fix broken ttyname[_r] (failure to null-terminate result)
Rich Felker [Sun, 2 Sep 2012 16:46:06 +0000 (12:46 -0400)]
avoid "inline" in public headers for strict c89 compatibility
while musl itself requires a c99 compiler, some applications insist on
being compiled with c89 compilers, and use of "inline" in the headers
was breaking them. much of this had been avoided already by just
skipping the inline keyword in pre-c99 compilers or modes, but this
new unified solution is cleaner and may/should result in better code
generation in the default gcc configuration.
Rich Felker [Sat, 1 Sep 2012 04:20:24 +0000 (00:20 -0400)]
fix wrong type for poll.h nfds_t
this should not break anything since the type should never be used
except as the argument type for poll.
Rich Felker [Thu, 30 Aug 2012 12:27:08 +0000 (08:27 -0400)]
fix missing statics in crypt_sha256 code
Rich Felker [Wed, 29 Aug 2012 16:56:12 +0000 (12:56 -0400)]
anti-DoS rounds count limits for blowfish and des crypt
all of the limits could use review, but err on the side of avoiding
excessive rounds for now.
Rich Felker [Wed, 29 Aug 2012 16:44:27 +0000 (12:44 -0400)]
limit sha512 rounds to similar runtime to sha256 limit
these limits could definitely use review, but for now, i feel
consistency and erring on the side of preventing servers from getting
bogged down by excessively-slow user-provided settings (think
.htpasswd) are the best policy. blowfish should be updated to match.
Rich Felker [Wed, 29 Aug 2012 16:41:29 +0000 (12:41 -0400)]
add sha256/sha512 crypt
based on versions sent to the list by nsz, with some simplification
and debloating. i'd still like to get them a bit smaller, or ideally
merge them into a single file with most of the code being shared, but
that can be done later.
Rich Felker [Wed, 29 Aug 2012 13:36:02 +0000 (09:36 -0400)]
get rid of eh_frame bloat
if needed for debugging, it will be output in the .debug_frame section
instead, where it is not part of the loaded program and where the
strip command is free to strip it.
Rich Felker [Mon, 27 Aug 2012 14:07:32 +0000 (10:07 -0400)]
fix bug caused by main app & libc having map set; cannot free them
Rich Felker [Mon, 27 Aug 2012 01:09:26 +0000 (21:09 -0400)]
dladdr support for dynamic linker (nonstandard extension)
based on patches submitted by boris brezillon. this commit also fixes
the issue whereby the main application and libc don't have the address
ranges of their mappings stored, which was theoretically a problem for
RTLD_NEXT support in dlsym; it didn't actually matter because libc
never calls dlsym, and it seemed to be doing the right thing (by
chance) for symbols in the main program as well.
Rich Felker [Sun, 26 Aug 2012 03:15:13 +0000 (23:15 -0400)]
implement "low hanging fruit" from C11
based on Gregor's patch sent to the list. includes:
- stdalign.h
- removing gets in C11 mode
- adding aligned_alloc and adjusting other functions to use it
- adding 'x' flag to fopen for exclusive mode
Rich Felker [Sun, 26 Aug 2012 02:49:47 +0000 (22:49 -0400)]
add c11 quick_exit and at_quick_exit functions
Rich Felker [Sat, 25 Aug 2012 21:40:27 +0000 (17:40 -0400)]
fix bug in gnu hash lookup on dlsym(handle, name) lookups
wrong hash was being passed; just a copy/paste error. did not affect
lookups in the global namespace; this is probably why it was not
caught in testing.
Rich Felker [Sat, 25 Aug 2012 21:31:59 +0000 (17:31 -0400)]
clean up search_vec usage for vdso
Rich Felker [Sat, 25 Aug 2012 21:30:59 +0000 (17:30 -0400)]
use new search_vec function to find vdso in dynamic linker
Rich Felker [Sat, 25 Aug 2012 21:24:46 +0000 (17:24 -0400)]
ensure canary is setup if stack-prot libs are dlopen'd into non-ssp app
previously, this usage could lead to a crash if the thread pointer was
still uninitialized, and otherwise would just cause the canary to be
zero (less secure).
Rich Felker [Sat, 25 Aug 2012 21:13:28 +0000 (17:13 -0400)]
add gnu hash support in the dynamic linker
based on the patches contributed by boris brezillon.
Rich Felker [Fri, 24 Aug 2012 21:01:17 +0000 (17:01 -0400)]
type exposure fixes in sys/sem.h
Rich Felker [Fri, 24 Aug 2012 20:16:30 +0000 (16:16 -0400)]
stdio_ext.h needs to include stdio.h, at least to get FILE...
Rich Felker [Fri, 24 Aug 2012 19:55:36 +0000 (15:55 -0400)]
fix missing uintXX_t in nameser.h
Rich Felker [Fri, 24 Aug 2012 18:23:16 +0000 (14:23 -0400)]
fix dirent.h with _BSD_SOURCE
Rich Felker [Thu, 23 Aug 2012 18:38:34 +0000 (14:38 -0400)]
optimize legacy ffs function
Rich Felker [Mon, 20 Aug 2012 00:48:16 +0000 (20:48 -0400)]
fix bug whereby most atexit-registered functions got skipped
Rich Felker [Sat, 18 Aug 2012 20:00:23 +0000 (16:00 -0400)]
make dynamic linker report all failures before exiting
before, only the first library that failed to load or symbol that
failed to resolve was reported, and then the dynamic linker
immediately exited. when attempting to fix a library compatibility
issue, this is about the worst possible behavior. now we print all
errors as they occur and exit at the very end if errors were
encountered.
Rich Felker [Sat, 18 Aug 2012 03:51:00 +0000 (23:51 -0400)]
release notes for 0.9.4
Rich Felker [Sat, 18 Aug 2012 03:45:21 +0000 (23:45 -0400)]
add mips to supported arch list in INSTALL file
Rich Felker [Sat, 18 Aug 2012 01:23:10 +0000 (21:23 -0400)]
crt1 must align stack pointer on mips
it's naturally aligned when entered with the kernel argv array, but if
ld.so has been invoked explicitly to run a program, the stack will not
be aligned due to having thrown away argv[0].
Rich Felker [Sat, 18 Aug 2012 00:02:37 +0000 (20:02 -0400)]
fix bug computing argc when invoking ld-musl-mips.so.1 progname ...
Rich Felker [Fri, 17 Aug 2012 23:32:24 +0000 (19:32 -0400)]
split up installation target
patch by Luca Barbato (lu_zero)
Rich Felker [Fri, 17 Aug 2012 21:13:53 +0000 (17:13 -0400)]
fix extremely rare but dangerous race condition in robust mutexes
if new shared mappings of files/devices/shared memory can be made
between the time a robust mutex is unlocked and its subsequent removal
from the pending slot in the robustlist header, the kernel can
inadvertently corrupt data in the newly-mapped pages when the process
terminates. i am fixing the bug by using the same global vm lock
mechanism that was used to fix the race condition with unmapping
barriers after pthread_barrier_wait returns.
Rich Felker [Fri, 17 Aug 2012 20:53:09 +0000 (16:53 -0400)]
fix float parsing logic for long decimal expansions
this affects at least the case of very long inputs, but may also
affect shorter inputs that become long due to growth while upscaling.
basically, the logic for the circular buffer indices of the initial
base-10^9 digit and the slot one past the final digit, and for
simplicity of the loop logic, assumes an invariant that they're not
equal. the upscale loop, which can increase the length of the
base-10^9 representation, attempted to preserve this invariant, but
was actually only ensuring that the end index did not loop around past
the start index, not that the two never become equal.
the main (only?) effect of this bug was that subsequent logic treats
the excessively long number as having no digits, leading to junk
results.
Rich Felker [Thu, 16 Aug 2012 02:35:02 +0000 (22:35 -0400)]
handle null arguments to legacy bsd err.h functions
Rich Felker [Wed, 15 Aug 2012 19:35:32 +0000 (15:35 -0400)]
improve headers to better deal with removed-in-posix-2008 features
with this patch, setting _POSIX_SOURCE, or setting _POSIX_C_SOURCE or
_XOPEN_SOURCE to an old version, will bring back the interfaces that
were removed in POSIX 2008 - at least the ones i've covered so far,
which are gethostby*, usleep, and ualarm. if there are other functions
still in widespread use that were removed for which similar changes
would be beneficial, they can be added just like this.
Rich Felker [Wed, 15 Aug 2012 12:31:44 +0000 (08:31 -0400)]
add missing xattr functions
not sure why these were originally omitted..
Rich Felker [Wed, 15 Aug 2012 04:19:42 +0000 (00:19 -0400)]
update copyright/credits for recent code additions
Rich Felker [Wed, 15 Aug 2012 02:50:16 +0000 (22:50 -0400)]
support configuring cross compiling with CROSS_COMPILE prefix variable
Rich Felker [Tue, 14 Aug 2012 01:55:35 +0000 (21:55 -0400)]
Merge remote-tracking branch 'nsz/bsd'
Rich Felker [Tue, 14 Aug 2012 01:55:22 +0000 (21:55 -0400)]
Merge remote-tracking branch 'nsz/exp'
nsz [Mon, 13 Aug 2012 20:06:01 +0000 (22:06 +0200)]
math: fix _BSD_SOURCE namespace in math.h
Rich Felker [Mon, 13 Aug 2012 20:00:31 +0000 (16:00 -0400)]
remove significandl
this function never existed historically; since the float/double
functions it's based on are nonstandard and deprecated, there's really
no justification for its existence except that glibc has it. it can be
added back if there's ever really a need...
Rich Felker [Mon, 13 Aug 2012 18:51:43 +0000 (14:51 -0400)]
add significand[fl] math functions
Rich Felker [Mon, 13 Aug 2012 18:50:30 +0000 (14:50 -0400)]
publicly expose getdents api under _BSD_SOURCE
Rich Felker [Sun, 12 Aug 2012 01:33:13 +0000 (21:33 -0400)]
memcpy asm for i386 and x86_64
Rich Felker [Sat, 11 Aug 2012 23:51:21 +0000 (19:51 -0400)]
avoid need for -march=mips2 to compile mips atomic.h asm
linux guarantees ll/sc are always available. on mips1, they will be
emulated by the kernel. thus they are part of the linux mips1 abi and
safe to use.
Rich Felker [Sat, 11 Aug 2012 22:40:33 +0000 (18:40 -0400)]
remove unused but buggy code from strstr.c
Rich Felker [Sat, 11 Aug 2012 22:39:12 +0000 (18:39 -0400)]
remove buggy short-string wcsstr implementation; always use twoway
since this interface is rarely used, it's probably best to lean
towards keeping code size down anyway. one-character needles will
still be found immediately by the initial wcschr call anyway.
Rich Felker [Sat, 11 Aug 2012 22:10:38 +0000 (18:10 -0400)]
add bsd fgetln function
optimized to avoid allocation and return lines directly out of the
stream buffer whenever possible.
Rich Felker [Sat, 11 Aug 2012 03:39:32 +0000 (23:39 -0400)]
minor but worthwhile optimization in printf: avoid expensive strspn
the strspn call was made for every format specifier and end-of-string,
even though the expected return value was 1-2 for normal usage.
replace with simple loop.
Rich Felker [Sat, 11 Aug 2012 02:18:49 +0000 (22:18 -0400)]
trivial optimization to printf: avoid wasted call frame
amusingly, this cuts more than 10% off the run time of printf("a"); on
the machine i tested it on.
sadly the same optimization is not possible for snprintf without
duplicating all the pseudo-FILE setup code, which is not worth it.
Rich Felker [Fri, 10 Aug 2012 19:13:26 +0000 (15:13 -0400)]
use int instead of long for ptrdiff_t on all 32-bit archs
this is needed to match the underlying "ABI" standards. it's not
really an ABI issue since the binary representations are the same, but
having the wrong type can lead to errors when the type arising from a
difference-of-pointers expression does not match the defined type of
ptrdiff_t. most of the problems affect C++, not C.
Rich Felker [Fri, 10 Aug 2012 18:59:20 +0000 (14:59 -0400)]
fix incorrect ptrdiff_t type on mips
Rich Felker [Fri, 10 Aug 2012 04:20:00 +0000 (00:20 -0400)]
add blowfish hash support to crypt
there are still some discussions going on about tweaking the code, but
at least thing brings us to the point of having something working in
the repository. hopefully the remaining major hashes (md5,sha) will
follow soon.
Rich Felker [Fri, 10 Aug 2012 02:52:13 +0000 (22:52 -0400)]
fix (hopefully) all hard-coded 8's for kernel sigset_t size
some minor changes to how hard-coded sets for thread-related purposes
are handled were also needed, since the old object sizes were not
necessarily sufficient. things have gotten a bit ugly in this area,
and i think a cleanup is in order at some point, but for now the goal
is just to get the code working on all supported archs including mips,
which was badly broken by linux rejecting syscalls with the wrong
sigset_t size.
Rich Felker [Fri, 10 Aug 2012 01:35:19 +0000 (21:35 -0400)]
add defines for number of sigset_t bytes syscalls expect
yet another gratuitous mips incompatibility...
Rich Felker [Fri, 10 Aug 2012 00:47:17 +0000 (20:47 -0400)]
make crypt return an unmatchable hash rather than NULL on failure
unfortunately, a large portion of programs which call crypt are not
prepared for its failure and do not check that the return value is
non-null before using it. thus, always "succeeding" but giving an
unmatchable hash is reportedly a better behavior than failing on
error.
it was suggested that we could do this the same way as other
implementations and put the null-to-unmatchable translation in the
wrapper rather than the individual crypt modules like crypt_des, but
when i tried to do it, i found it was making the logic in __crypt_r
for keeping track of which hash type we're working with and whether it
succeeded or failed much more complex, and potentially error-prone.
the way i'm doing it now seems to have essentially zero cost, anyway.
nsz [Wed, 8 Aug 2012 18:18:16 +0000 (20:18 +0200)]
math: fix exp.s on i386 and x86_64 so the exception flags are correct
exp(inf), exp(-inf), exp(nan) used to raise wrong flags
Rich Felker [Tue, 7 Aug 2012 23:59:28 +0000 (19:59 -0400)]
further fixes for mips ioctl.h header
untested; hopefully it's right now
Rich Felker [Tue, 7 Aug 2012 23:19:21 +0000 (19:19 -0400)]
fix another mips gratuitous-incompatibility bug: ioctl numbers
Rich Felker [Tue, 7 Aug 2012 23:10:51 +0000 (19:10 -0400)]
fix bug dlsym bug that slipped in during dynamic linker cleanup
Rich Felker [Sun, 5 Aug 2012 21:23:38 +0000 (17:23 -0400)]
make configure accept mipsel
Rich Felker [Sun, 5 Aug 2012 19:39:12 +0000 (15:39 -0400)]
dlsym RTLD_NEXT support for mips
untested
Rich Felker [Sun, 5 Aug 2012 18:23:40 +0000 (14:23 -0400)]
fix socket.h on mips
why does mips have to be gratuitously incompatible in every possible
imaginable way?
Rich Felker [Sun, 5 Aug 2012 18:12:10 +0000 (14:12 -0400)]
align mips _init/_fini functions
since .init and .fini are not .text, the toolchain does not seem to
align them for code by default. this yields random breakage depending
on the object sizes the linker is dealing with.
Rich Felker [Sun, 5 Aug 2012 18:03:17 +0000 (14:03 -0400)]
more changes that were lost when committing mips dynamic linker
Rich Felker [Sun, 5 Aug 2012 17:48:42 +0000 (13:48 -0400)]
more stuff lost committing mips dynamic linker
Rich Felker [Sun, 5 Aug 2012 17:46:39 +0000 (13:46 -0400)]
fix change lost in the process of integrating mips dynamic linker
Rich Felker [Sun, 5 Aug 2012 16:57:19 +0000 (12:57 -0400)]
remove configure check disabling shared libraries on mips
Rich Felker [Sun, 5 Aug 2012 16:50:26 +0000 (12:50 -0400)]
mips dynamic linker support
not heavily tested, but the basics are working. the basic concept is
that the dynamic linker entry point code invokes a pure-PIC (no global
accesses) C function in reloc.h to perform the early GOT relocations
needed to make the dynamic linker itself functional, then invokes
__dynlink like on other archs. since mips uses some ugly arch-specific
hacks to optimize relocating the GOT (rather than just using the
normal DT_REL[A] tables like on other archs), the dynamic linker has
been modified slightly to support calling arch-specific relocation
code in reloc.h.
most of the actual mips-specific behavior was developed by reading the
output of readelf on libc.so and simple executable files. i could not
find good reference information on which relocation types need to be
supported or their semantics, so it's possible that some legitimate
usage cases will not work yet.
Rich Felker [Sun, 5 Aug 2012 16:32:20 +0000 (12:32 -0400)]
make dynlink.lo depend on reloc.h in makefile
this is mainly a development convenience but will also ensure users
building from latest git always get up-to-date arch-specific dynamic
linker code without having to "make clean".
Rich Felker [Sun, 5 Aug 2012 06:49:02 +0000 (02:49 -0400)]
more cleanup of dynamic linker internals
Rich Felker [Sun, 5 Aug 2012 06:44:32 +0000 (02:44 -0400)]
more dynamic linker internals cleanup
changing the string printed for the dso name is not a regression; the
old code was simply using the wrong dso name (head rather than the dso
currently being relocated). this will be fixed in a later commit.
Rich Felker [Sun, 5 Aug 2012 06:38:35 +0000 (02:38 -0400)]
dynamic linker internals cleanup
Rich Felker [Sun, 5 Aug 2012 06:37:14 +0000 (02:37 -0400)]
floating point support for arm setjmp/longjmp
not heavily tested, but at least they don't seem to break anything on
soft float targets with or without coprocessors. they check the auxv
AT_HWCAP flags to determine which coprocessor, if any, is available.
Rich Felker [Fri, 3 Aug 2012 02:11:49 +0000 (22:11 -0400)]
release notes for 0.9.3
Rich Felker [Fri, 3 Aug 2012 01:05:43 +0000 (21:05 -0400)]
abstract out compiler runtime library for linking libc.so
this allows config.mak to override the default -lgcc for building with
other compilers such as pcc/clang/etc.
Rich Felker [Fri, 3 Aug 2012 01:02:34 +0000 (21:02 -0400)]
fix argument type error on wcwidth function
since the correct declaration was not visible, and since the
representation of the types wchar_t and wint_t always match, a
compiler would have to go out of its way to make this bug manifest,
but better to fix it anyway.
Rich Felker [Thu, 2 Aug 2012 18:32:17 +0000 (14:32 -0400)]
fix missing static in getusershell (namespace pollution)
Rich Felker [Wed, 1 Aug 2012 01:18:17 +0000 (21:18 -0400)]
optimize mempcpy to minimize need for data saved across the call
Rich Felker [Fri, 27 Jul 2012 04:17:09 +0000 (00:17 -0400)]
optimize arm setjmp/longjmp register saving/loading
the original code was wrongly based on how it would be done in thumb
mode, but that's not needed because musl's asm only targets arm.
Rich Felker [Fri, 27 Jul 2012 04:14:57 +0000 (00:14 -0400)]
save AT_HWCAP from auxv for subsequent use in machine-specific code
it's expected that this will be needed/useful only in asm, so I've
given it its own symbol that can be addressed in pc-relative ways from
asm rather than adding a field in the __libc structure which would
require hard-coding the offset wherever it's used.
Rich Felker [Tue, 24 Jul 2012 04:51:36 +0000 (00:51 -0400)]
retry on cas failures in sem_trywait
this seems counter-intuitive since sem_trywait is supposed to just try
once, not wait for the semaphore. however, the retry loop is not a
wait. instead, it's to handle the case where the value changes due to
a simultaneous post or wait from another thread while the semaphore
value remains positive. in such a case, it's absolutely wrong for
sem_trywait to fail with EAGAIN because the semaphore is not busy.
Rich Felker [Tue, 24 Jul 2012 03:29:03 +0000 (23:29 -0400)]
gcc wrapper improvement: leave libgcc dir in the library path
this is needed in case -lgcc is passed explicitly on the link command
line, for example if the wrapper is being used to build musl itself.
Rich Felker [Mon, 23 Jul 2012 20:54:53 +0000 (16:54 -0400)]
add ioperm/iopl syscalls
based on patches by orc and Isaac Dunham, with some fixes. sys/io.h
exists and contains prototypes for these functions regardless of
whether the target arch has them; this is a bit unorthodox but I don't
think it will break anything. the function definitions do not exist
unless the appropriate SYS_* syscall number macro is defined, which
should make sure configure scripts looking for these functions don't
find them on other systems.
presently, sys/io.h does not have the inb/outb/etc. port io
macros/functions. I'd be surprised if ioperm/iopl are useful without
them, so they probably need to be added at some point in appropriate
bits/io.h files...
Rich Felker [Mon, 23 Jul 2012 20:50:56 +0000 (16:50 -0400)]
add splice and vmsplice syscalls
based on patches by orc and Isaac Dunham.
Rich Felker [Mon, 23 Jul 2012 20:39:44 +0000 (16:39 -0400)]
add extended attributes syscalls
based on patch by orc and Isaac Dunham, with some fixes.
Rich Felker [Mon, 23 Jul 2012 20:32:49 +0000 (16:32 -0400)]
add pipe2 syscall
based on patch by orc and Isaac Dunham, with some details fixed.
Rich Felker [Mon, 23 Jul 2012 02:09:45 +0000 (22:09 -0400)]
remove scanf dependency from getaddrinfo /etc/services support
Rich Felker [Sun, 22 Jul 2012 23:42:44 +0000 (19:42 -0400)]
getaddrinfo /etc/services lookup support
Rich Felker [Sun, 22 Jul 2012 23:02:02 +0000 (19:02 -0400)]
fix namespace issue in prototypes in math.h
Rich Felker [Sun, 22 Jul 2012 22:58:35 +0000 (18:58 -0400)]
fix wrong size for sigjmp_buf signal set array
128 is the size in bytes, not longs.
Rich Felker [Sun, 22 Jul 2012 22:55:01 +0000 (18:55 -0400)]
add floating point register saving/restoring to mips setjmp/longjmp
also fix the alignment of jmp_buf to meet the abi. linux always
emulates fpu on mips if it's not present, so enabling this code
unconditionally is "safe" but may be slow. in the long term it may be
preferable to find a way to disable it on soft float builds.
Rich Felker [Sun, 22 Jul 2012 22:49:49 +0000 (18:49 -0400)]
make getservby*_r return error code rather than -1 (and using errno)
untested but should be correct..
Rich Felker [Sat, 21 Jul 2012 21:56:48 +0000 (17:56 -0400)]
fix logic error for skipping failed interfaces in if_nameindex
Rich Felker [Thu, 19 Jul 2012 04:37:43 +0000 (00:37 -0400)]
fix typo in aio.h