Commit Graph

1554 Commits

Author SHA1 Message Date
Rich Felker
11458e5b09 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.
2012-08-17 16:53:09 -04:00
Rich Felker
dc82ee4e30 handle null arguments to legacy bsd err.h functions 2012-08-15 22:35:02 -04:00
Rich Felker
3f80afc505 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.
2012-08-15 15:35:32 -04:00
Rich Felker
7650390de8 add missing xattr functions
not sure why these were originally omitted..
2012-08-15 08:31:44 -04:00
Rich Felker
0d4d1a96e4 update copyright/credits for recent code additions 2012-08-15 00:19:42 -04:00
Rich Felker
94e920d0cd support configuring cross compiling with CROSS_COMPILE prefix variable 2012-08-14 22:50:16 -04:00
Rich Felker
b99836f3ad Merge remote-tracking branch 'nsz/bsd' 2012-08-13 21:55:35 -04:00
Rich Felker
2d93d64461 Merge remote-tracking branch 'nsz/exp' 2012-08-13 21:55:22 -04:00
nsz
23e6940a2c math: fix _BSD_SOURCE namespace in math.h 2012-08-13 22:06:01 +02:00
Rich Felker
ab76321c14 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...
2012-08-13 16:00:31 -04:00
Rich Felker
2242bf616b add significand[fl] math functions 2012-08-13 14:51:43 -04:00
Rich Felker
0c42beb5f9 publicly expose getdents api under _BSD_SOURCE 2012-08-13 14:50:30 -04:00
Rich Felker
aaa9eb5101 memcpy asm for i386 and x86_64 2012-08-11 21:33:13 -04:00
Rich Felker
036eaa24cf 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.
2012-08-11 19:51:21 -04:00
Rich Felker
f997e224fc remove unused but buggy code from strstr.c 2012-08-11 18:40:33 -04:00
Rich Felker
35c16933f0 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.
2012-08-11 18:39:12 -04:00
Rich Felker
617182734c add bsd fgetln function
optimized to avoid allocation and return lines directly out of the
stream buffer whenever possible.
2012-08-11 18:10:38 -04:00
Rich Felker
2b964b010e 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.
2012-08-10 23:39:32 -04:00
Rich Felker
4c346919a9 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.
2012-08-10 22:18:49 -04:00
Rich Felker
e3ebe7db5d 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.
2012-08-10 15:13:26 -04:00
Rich Felker
c5875ad34b fix incorrect ptrdiff_t type on mips 2012-08-10 14:59:20 -04:00
Rich Felker
a02bf5fc50 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.
2012-08-10 00:20:00 -04:00
Rich Felker
2f437040e7 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.
2012-08-09 22:52:13 -04:00
Rich Felker
83b42d94bd add defines for number of sigset_t bytes syscalls expect
yet another gratuitous mips incompatibility...
2012-08-09 21:35:19 -04:00
Rich Felker
b3c4cc121f 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.
2012-08-09 20:47:17 -04:00
nsz
1fb0169154 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
2012-08-08 20:18:16 +02:00
Rich Felker
ae0b9da48c further fixes for mips ioctl.h header
untested; hopefully it's right now
2012-08-07 19:59:28 -04:00
Rich Felker
ff02f94e2d fix another mips gratuitous-incompatibility bug: ioctl numbers 2012-08-07 19:19:21 -04:00
Rich Felker
6ecff18cc5 fix bug dlsym bug that slipped in during dynamic linker cleanup 2012-08-07 19:10:51 -04:00
Rich Felker
721564a264 make configure accept mipsel 2012-08-05 17:23:38 -04:00
Rich Felker
3a1e7566db dlsym RTLD_NEXT support for mips
untested
2012-08-05 15:39:12 -04:00
Rich Felker
7fee5f9606 fix socket.h on mips
why does mips have to be gratuitously incompatible in every possible
imaginable way?
2012-08-05 14:23:40 -04:00
Rich Felker
32e7bd78ae 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.
2012-08-05 14:12:10 -04:00
Rich Felker
7d9a5c6af7 more changes that were lost when committing mips dynamic linker 2012-08-05 14:03:17 -04:00
Rich Felker
fa91df41e8 more stuff lost committing mips dynamic linker 2012-08-05 13:48:42 -04:00
Rich Felker
59f4086cb1 fix change lost in the process of integrating mips dynamic linker 2012-08-05 13:46:39 -04:00
Rich Felker
470569ca00 remove configure check disabling shared libraries on mips 2012-08-05 12:57:19 -04:00
Rich Felker
babf820180 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.
2012-08-05 12:50:26 -04:00
Rich Felker
d04378016b 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".
2012-08-05 12:32:20 -04:00
Rich Felker
87d13a4c33 more cleanup of dynamic linker internals 2012-08-05 02:49:02 -04:00
Rich Felker
7cb44cd3de 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.
2012-08-05 02:44:32 -04:00
Rich Felker
05eff01e89 dynamic linker internals cleanup 2012-08-05 02:38:35 -04:00
Rich Felker
5a3a378615 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.
2012-08-05 02:37:14 -04:00
Rich Felker
8a996b7e6c release notes for 0.9.3 2012-08-02 22:11:49 -04:00
Rich Felker
1b23145e88 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.
2012-08-02 21:05:43 -04:00
Rich Felker
b0fc78520d 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.
2012-08-02 21:02:34 -04:00
Rich Felker
129ca6c05d fix missing static in getusershell (namespace pollution) 2012-08-02 14:32:17 -04:00
Rich Felker
970ef6a124 optimize mempcpy to minimize need for data saved across the call 2012-07-31 21:18:17 -04:00
Rich Felker
5aac5e2189 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.
2012-07-27 00:17:09 -04:00
Rich Felker
e1b9c1b01b 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.
2012-07-27 00:14:57 -04:00