| Commit message (Expand) | Author | Age | Files | Lines |
|---|
| * | fix lio_listio return value in LIO_WAIT mode | Szabolcs Nagy | 2013-01-13 | 1 | -1/+1 |
| * | 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
| Rich Felker | 2013-01-10 | 1 | -1/+17 |
| * | __assert_fail(): remove _Noreturn, to get proper stacktraces•••for _Noreturn functions, gcc generates code that trashes the
stack frame, and so it makes it impossible to inspect the causes
of an assert error in gdb.
abort() is not affected (i have not yet investigated why).
| rofl0r | 2013-01-04 | 1 | -1/+1 |
| * | math: bessel cleanup (jn.c and jnf.c)•••both jn and yn functions had integer overflow issues for large
and small n
to handle these issues nm1 (== |n|-1) is used instead of n and -n
in the code and some loops are changed to make sure the iteration
counter does not overflow
(another solution could be to use larger integer type or even double
but that has more size and runtime cost, on x87 loading int64_t or
even uint32_t into an fpu register is more than two times slower than
loading int32_t, and using double for n slows down iteration logic)
yn(-1,0) now returns inf
posix2008 specifies that on overflow and at +-0 all y0,y1,yn functions
return -inf, this is not consistent with math when n<0 odd integer in yn
(eg. when x->0, yn(-1,x)->inf, but historically yn(-1,0) seems to be
special cased and returned -inf)
some threshold values in jnf and ynf were fixed that seems to be
incorrectly copy-pasted from the double version
| Szabolcs Nagy | 2013-01-01 | 2 | -164/+161 |
| * | math: bessel cleanup (j1.c and j1f.c)•••a common code path in j1 and y1 was factored out so the resulting
object code is a bit smaller
unsigned int arithmetics is used for bit manipulation
j1(-inf) now returns 0 instead of -0
an incorrect threshold in the common code of j1f and y1f got fixed
(this caused spurious overflow and underflow exceptions)
the else branch in pone and pzero functions are fixed
(so code analyzers dont warn about uninitialized values)
| Szabolcs Nagy | 2013-01-01 | 2 | -187/+138 |
| * | math: bessel cleanup (j0.c and j0f.c)•••a common code path in j0 and y0 was factored out so the resulting
object code is smaller
unsigned int arithmetics is used for bit manipulation
the logic of j0 got a bit simplified (x < 1 case was handled
separately with a bit higher precision than now, but there are large
errors in other domains anyway so that branch has been removed)
some threshold values were adjusted in j0f and y0f
| Szabolcs Nagy | 2013-01-01 | 2 | -203/+161 |
| * | fix alignment logic in strlcpy | Rich Felker | 2012-12-26 | 1 | -1/+1 |
| * | fix reference to libc struct in static tls init code•••libc is the macro, __libc is the internal symbol, but under some
configurations on old/broken compilers, the symbol might not actually
exist and the libc macro might instead use __libc_loc() to obtain
access to the object.
| Rich Felker | 2012-12-25 | 1 | -1/+1 |
| * | clean up and fix logic for making mmap fail on invalid/unsupported offsets•••the previous logic was assuming the kernel would give EINVAL when
passed an invalid address, but instead with MAP_FIXED it was giving
EPERM, as it considered this an attempt to map over kernel memory.
instead of trying to get the kernel to do the rigth thing, the new
code just handles the error in userspace.
I have also cleaned up the code to use a single mask to check for
invalid low bits and unsupported high bits, so it's simpler and more
clearly correct. the old code was actually wrong for sizeof(long)
smaller than sizeof(off_t) but not equal to 4; now it should be
correct for all possibilities.
for 64-bit systems, the low-bits test is new and extraneous (the
kernel should catch the error anyway when the mmap2 syscall is not
used), but it's cheap anyway. if this is an issue, the OFF_MASK
definition could be tweaked to omit the low bits when SYS_mmap2 is not
defined.
| Rich Felker | 2012-12-20 | 1 | -3/+7 |
| * | merge a few fixes by sh4rm4 | Rich Felker | 2012-12-19 | 1 | -0/+11 |
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| | * | add inet_network (required for wine) | rofl0r | 2012-12-19 | 1 | -0/+11 |
| * | | math: use 0x1p-120f and 0x1p120f for tiny and huge values•••previously 0x1p-1000 and 0x1p1000 was used for raising inexact
exception like x+tiny (when x is big) or x+huge (when x is small)
the rational is that these float consts are large enough
(0x1p-120 + 1 raises inexact even on ld128 which has 113 mant bits)
and float consts maybe smaller or easier to load on some platforms
(on i386 this reduced the object file size by 4bytes in some cases)
| Szabolcs Nagy | 2012-12-16 | 10 | -27/+27 |
| * | | math: tgammal.c fixes•••this is not a full rewrite just fixes to the special case logic:
+-0 and non-integer x<INT_MIN inputs incorrectly raised invalid
exception and for +-0 the return value was wrong
so integer test and odd/even test for negative inputs are changed
and a useless overflow test was removed
| Szabolcs Nagy | 2012-12-16 | 1 | -28/+23 |
| * | | math: tanh.c cleanup similar to sinh, cosh•••comments are kept in the double version of the function
compared to fdlibm/freebsd we partition the domain into one
more part and select different threshold points:
now the [log(5/3)/2,log(3)/2] and [log(3)/2,inf] domains
should have <1.5ulp error
(so only the last bit may be wrong, assuming good exp, expm1)
(note that log(3)/2 and log(5/3)/2 are the points where tanh
changes resolution: tanh(log(3)/2)=0.5, tanh(log(5/3)/2)=0.25)
for some x < log(5/3)/2 (~=0.2554) the error can be >1.5ulp
but it should be <2ulp
(the freebsd code had some >2ulp errors in [0.255,1])
even with the extra logic the new code produces smaller
object files
| Szabolcs Nagy | 2012-12-16 | 3 | -173/+83 |
| * | | math: sinh.c cleanup similar to the cosh one•••comments are kept in the double version of the function
| Szabolcs Nagy | 2012-12-16 | 3 | -170/+71 |
| * | | math: finished cosh.c cleanup•••changed the algorithm: large input is not special cased
(when exp(-x) is small compared to exp(x))
and the threshold values are reevaluated
(fdlibm code had a log(2)/2 cutoff for which i could not find
justification, log(2) seems to be a better threshold and this
was verified empirically)
the new code is simpler, makes smaller binaries and should be
faster for common cases
the old comments were removed as they are no longer true for the
new algorithm and the fdlibm copyright was dropped as well
because there is no common code or idea with the original anymore
except for trivial ones.
| Szabolcs Nagy | 2012-12-16 | 3 | -142/+49 |
| |/ |
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| * | math: x86_64 version of expl, fixed some comments in the i386 version | Szabolcs Nagy | 2012-12-16 | 4 | -4/+112 |
| * | math: move x86_64 exp2l implementation to exp2l.s from expl.s | Szabolcs Nagy | 2012-12-16 | 3 | -85/+76 |
| * | fix breakage in ldd (failure to print library load address) | Rich Felker | 2012-12-15 | 1 | -2/+2 |
| * | math: fix i386/expl.s with more precise x*log2e•••with naive exp2l(x*log2e) the last 12bits of the result was incorrect
for x with large absolute value
with hi + lo = x*log2e is caluclated to 128 bits precision and then
expl(x) = exp2l(hi) + exp2l(hi) * f2xm1(lo)
this gives <1.5ulp measured error everywhere in nearest rounding mode
| Szabolcs Nagy | 2012-12-14 | 2 | -7/+107 |
| * | math: add a non-dummy tgamma implementation•••uses the lanczos approximation method with the usual tweaks.
same parameters were selected as in boost and python.
(avoides some extra work and special casing found in boost
so the precision is not that good: measured error is <5ulp for
positive x and <10ulp for negative)
an alternative lgamma_r implementation is also given in the same
file which is simpler and smaller than the current one, but less
precise so it's ifdefed out for now.
| Szabolcs Nagy | 2012-12-12 | 2 | -20/+215 |
| * | math: cosh cleanup•••do fabs by hand, don't check for nan and inf separately
| Szabolcs Nagy | 2012-12-12 | 3 | -70/+63 |
| * | math: fix comment in __rem_pio2f.c | Szabolcs Nagy | 2012-12-12 | 1 | -2/+2 |
| * | math: add empty __invtrigl.s to i386 and x86_64•••__invtrigl is not needed when acosl, asinl, atanl have asm
implementations
| Szabolcs Nagy | 2012-12-12 | 2 | -0/+0 |
| * | math: clean up inverse trigonometric functions•••modifications:
* avoid unsigned->signed conversions
* removed various volatile hacks
* use FORCE_EVAL when evaluating only for side-effects
* factor out R() rational approximation instead of manual inline
* __invtrigl.h now only provides __invtrigl_R, __pio2_hi and __pio2_lo
* use 2*pio2_hi, 2*pio2_lo instead of pi_hi, pi_lo
otherwise the logic is not changed, long double versions will
need a revisit when a genaral long double cleanup happens
| Szabolcs Nagy | 2012-12-11 | 12 | -377/+258 |
| * | math: rewrite inverse hyperbolic functions to be simpler/smaller•••modifications:
* avoid unsigned->signed integer conversion
* do not handle special cases when they work correctly anyway
* more strict threshold values (0x1p26 instead of 0x1p28 etc)
* smaller code, cleaner branching logic
* same precision as the old code:
acosh(x) has up to 2ulp error in [1,1.125]
asinh(x) has up to 1.6ulp error in [0.125,0.5], [-0.5,-0.125]
atanh(x) has up to 1.7ulp error in [0.125,0.5], [-0.5,-0.125]
| Szabolcs Nagy | 2012-12-11 | 9 | -406/+149 |
| * | make CMPLX macros available in complex.h in non-c11 mode as well | Szabolcs Nagy | 2012-12-11 | 1 | -8/+0 |
| * | fix double errno-decoding in the old-kernel fallback path of pipe2•••this bug seems to have caused any failure by pipe2 on such systems to
set errno to 1, rather than the proper error code.
| Rich Felker | 2012-12-11 | 1 | -1/+1 |
| * | document self-synchronized destruction issue for stdio locking | Rich Felker | 2012-12-10 | 1 | -0/+10 |
| * | page-align initial brk value used by malloc in shared libc•••this change fixes an obscure issue with some nonstandard kernels,
where the initial brk syscall returns a pointer just past the end of
bss rather than the beginning of a new page. in that case, the dynamic
linker has already reclaimed the space between the end of bss and the
page end for use by malloc, and memory corruption (allocating the same
memory twice) will occur when malloc again claims it on the first call
to brk.
| Rich Felker | 2012-12-07 | 1 | -1/+5 |
| * | remove __arch_prctl alias for arch_prctl•••if there's evidence of any use for it, we can add it back later. as
far as I can tell, glibc has it only for internal use (and musl uses a
direct syscall in that case rather than a function call), not for
exposing it to applications.
| Rich Felker | 2012-12-07 | 1 | -3/+1 |
| * | move new linux syscall wrapper functions to proper source dir | Rich Felker | 2012-12-07 | 2 | -0/+0 |
| * | fix trailing whitespace issues that crept in here and there | Rich Felker | 2012-12-07 | 4 | -4/+4 |
| * | fix invalid read in aligned_alloc•••in case of mmap-obtained chunks, end points past the end of the
mapping and reading it may fault. since the value is not needed until
after the conditional, move the access to prevent invalid reads.
| Rich Felker | 2012-12-06 | 1 | -2/+3 |
| * | fix sigorset/sigandset: _NSIG/8 is the size in bytes | rofl0r | 2012-12-06 | 2 | -2/+2 |
| * | sigandset/sigorset: do not check for NULL pointers.•••that way it's consistent with existing sig* functions, and saves
some code size.
| rofl0r | 2012-12-06 | 2 | -10/+0 |
| * | fixup sigandset | rofl0r | 2012-12-06 | 2 | -2/+2 |
| * | add arch_prctl syscall (amd64/x32 only) | rofl0r | 2012-12-06 | 1 | -0/+9 |
| * | add personality syscall | rofl0r | 2012-12-06 | 1 | -0/+7 |
| * | add sigandset and sigorset (needed for qemu) | rofl0r | 2012-12-06 | 2 | -0/+34 |
| * | add obsolete futimesat()•••this function is obsolete, however it's available as a syscall
and as such qemu userspace emulation tries to forward it to the
host kernel.
| rofl0r | 2012-12-06 | 1 | -0/+9 |
| * | remove fenv saving/loading code from setjmp/longjmp on arm•••the issue is identical to the recent commit fixing the mips versions:
despite other implementations doing this, it conflicts with the
requirements of ISO C and it's a waste of time and code size.
| Rich Felker | 2012-12-05 | 2 | -4/+0 |
| * | remove mips setjmp/longjmp code to save/restore fenv•••nothing in the standard requires or even allows the fenv state to be
restored by longjmp. restoring the exception flags is not such a big
deal since it's probably valid to clobber them completely, but
restoring the rounding mode yields an observable side effect not
sanctioned by ISO C. saving/restoring it also wastes a few cycles and
16 bytes of code.
as for historical behavior, reportedly SGI IRIX did save/restore fenv,
and this is where glibc and uClibc got the behavior from. a few other
systems save/restore it too (on archs other than mips), even though
this is apparently wrong. further details are documented here:
http://www-personal.umich.edu/~williams/archive/computation/setjmp-fpmode.html
as musl aims for standards conformance rather than coddling historical
programs expecting non-conforming behavior, and as it's unlikely that
any historical programs actually depend on the incorrect behavior
(such programs would break on other archs, anyway), I'm making the
change not to save/restore fenv on mips.
| Rich Felker | 2012-12-05 | 2 | -5/+1 |
| * | use alternate argument syntax for restrict with lio_listio•••for some reason I have not been able to determine, gcc 3.2 rejects the
array notation. this seems to be a gcc bug, but since it's easy to
work around, let's do the workaround and avoid gratuitously requiring
newer compilers.
| Rich Felker | 2012-12-04 | 1 | -1/+1 |
| * | fix ordering of shared library ctors with respect to libc init•••previously, shared library constructors were being called before
important internal things like the environment (extern char **environ)
and hwcap flags (needed for sjlj to work right with float on arm) were
initialized in __libc_start_main. rather than trying to have to
dynamic linker make sure this stuff all gets initialized right, I've
opted to just defer calling shared library constructors until after
the main program's entry point is reached. this also fixes the order
of ctors to be the exact reverse of dtors, which is a desirable
property and possibly even mandated by some languages.
the main practical effect of this change is that shared libraries
calling getenv from ctors will no longer fail.
| Rich Felker | 2012-11-30 | 2 | -3/+11 |
| * | fix some restrict-qualifier mismatches in newly added interfaces•••these should have little/no practical impact but they're needed for
strict conformance.
| Rich Felker | 2012-11-27 | 1 | -2/+2 |
| * | eliminate gdb complaints about missing linux-gate.so.1•••actually, the hard-coded name should be eliminated too, and replaced
by a search for the soname in the headers, but that can be done
separately later.
| Rich Felker | 2012-11-25 | 1 | -1/+2 |
| * | fix powerpc sigsetjmp asm to match the new jmp_buf size/offsets | Rich Felker | 2012-11-23 | 1 | -2/+2 |
| * | fix powerpc setjmp/longjmp to save/restore float regs; enlarge/align jmp_buf | Rich Felker | 2012-11-23 | 2 | -0/+36 |
| * | powerpc: handle syscall error in clone.•••sigsetjmp: store temporaries in jmp_buf rather than on stack.
| rofl0r | 2012-11-19 | 2 | -39/+24 |
