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2012-12-07fix trailing whitespace issues that crept in here and thereRich Felker4-4/+4
2012-12-06fix invalid read in aligned_allocRich Felker1-2/+3
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.
2012-12-06fix sigorset/sigandset: _NSIG/8 is the size in bytesrofl0r2-2/+2
2012-12-06sigandset/sigorset: do not check for NULL pointers.rofl0r2-10/+0
that way it's consistent with existing sig* functions, and saves some code size.
2012-12-06fixup sigandsetrofl0r2-2/+2
2012-12-06add arch_prctl syscall (amd64/x32 only)rofl0r1-0/+9
2012-12-06add personality syscallrofl0r1-0/+7
2012-12-06add sigandset and sigorset (needed for qemu)rofl0r2-0/+34
2012-12-06add obsolete futimesat()rofl0r1-0/+9
this function is obsolete, however it's available as a syscall and as such qemu userspace emulation tries to forward it to the host kernel.
2012-12-05remove fenv saving/loading code from setjmp/longjmp on armRich Felker2-4/+0
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.
2012-12-05remove mips setjmp/longjmp code to save/restore fenvRich Felker2-5/+1
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.
2012-12-04use alternate argument syntax for restrict with lio_listioRich Felker1-1/+1
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.
2012-11-30fix ordering of shared library ctors with respect to libc initRich Felker2-3/+11
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.
2012-11-27fix some restrict-qualifier mismatches in newly added interfacesRich Felker1-2/+2
these should have little/no practical impact but they're needed for strict conformance.
2012-11-25eliminate gdb complaints about missing linux-gate.so.1Rich Felker1-1/+2
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.
2012-11-23fix powerpc sigsetjmp asm to match the new jmp_buf size/offsetsRich Felker1-2/+2
2012-11-23fix powerpc setjmp/longjmp to save/restore float regs; enlarge/align jmp_bufRich Felker2-0/+36
2012-11-19powerpc: handle syscall error in clone.rofl0r2-39/+24
sigsetjmp: store temporaries in jmp_buf rather than on stack.
2012-11-18fix powerpc asm not to store data in volatile space below stack pointerRich Felker2-12/+12
it's essential to decrement the stack pointer before writing to new stack space, rather than afterwards. otherwise there is a race condition during which asynchronous code (signals) could clobber the data being stored. it may be possible to optimize the code further using stwu, but I wanted to avoid making any changes to the actual stack layout in this commit. further improvements can be made separately if desired.
2012-11-18add port io functions to sys/io.hRich Felker2-2/+4
based on proposal by Isaac Dunham. nonexistance of bits/io.h will cause inclusion of sys/io.h to produce an error on archs that are not supposed to have it. this is probably the desired behavior, but the error message may be a bit unusual.
2012-11-18fenv support for ppc, untestedRich Felker1-0/+120
based on code sent to the mailing list by nsz, with minor changes.
2012-11-18fix feholdexcept -- it needs to clear exceptions after saving environmentRich Felker1-0/+1
2012-11-18Merge remote-tracking branch 'nsz/math'Rich Felker7-237/+171
2012-11-18math: use float constants in exp10f.cSzabolcs Nagy1-1/+1
use the 'f' suffix when a float constant is not representable
2012-11-18math: expl.c cleanupSzabolcs Nagy1-24/+19
raise overflow and underflow when necessary, fix various comments.
2012-11-18math: expf.c cleanupSzabolcs Nagy2-63/+55
similar to exp.c cleanup: use scalbnf, don't return excess precision, drop some optimizatoins. exp.c was changed to be more consistent with expf.c code.
2012-11-17fix typo in dynamic linker path file loading codeRich Felker1-1/+1
fortunately the memory corruption could not hurt anything, but it prevented clearing the final newline and thus prevented the last path element from working.
2012-11-17add stub versions of some missing optional pthread interfacesRich Felker5-0/+30
priority inheritance is not yet supported, and priority protection probably will not be supported ever unless there's serious demand for it (it's a fairly heavy-weight feature). per-thread cpu clocks would be nice to have, but to my knowledge linux is still not capable of supporting them. glibc fakes them by using the _process_ cpu-time clock and subtracting the thread creation time, which gives seriously incorrect semantics (worse than not supporting the feature at all), so until there's a way to do it right, it will remain as a stub that always fails.
2012-11-17math: cleanup exp2.c exp2f.c and exp2l.cSzabolcs Nagy3-86/+56
* old code relied on sign extension on right shift * exp2l ld64 wrapper was wrong * use scalbn instead of bithacks
2012-11-17arg-skipping code for powerpc dynamic linkerRich Felker1-0/+8
this allows using the dynamic linker as a command to load programs.
2012-11-17math: exp.c clean upSzabolcs Nagy1-72/+49
overflow and underflow was incorrect when the result was not stored. an optimization for the 0.5*ln2 < |x| < 1.5*ln2 domain was removed. did various cleanups around static constants and made the comments consistent with the code.
2012-11-16dynamic linking support for powerpcRich Felker1-17/+16
incomplete but at least partly working. requires all files to be compiled in the new "secure" plt model, not the old one that put plt code in the data segment. TLS is untested but may work. invoking the dynamic linker explicitly to load a program does not yet handle argv correctly.
2012-11-15Merge remote-tracking branch 'nsz/math'Rich Felker86-372/+330
2012-11-14fix indention with spaces in powerpc asmRich Felker7-55/+54
2012-11-14Merge remote-tracking branch 'ppc-port/ppc-squashed'Rich Felker11-0/+335
2012-11-14fenv: return FE_TONEAREST in dummy fegetroundSzabolcs Nagy1-1/+1
2012-11-14math: ld80 invtrig cleanupsSzabolcs Nagy8-110/+87
keeping only commonly used data in invtrigl
2012-11-13math: simplify hypot and hypotf using scalbnSzabolcs Nagy2-11/+4
this also fixes overflow/underflow raising and excess precision issues (as those are handled well in scalbn)
2012-11-13math: turn off the STRICT_ASSIGN workaround by defaultSzabolcs Nagy1-5/+3
the volatile hack in STRICT_ASSIGN is only needed if assignment is not respected and excess precision is kept. gcc -fexcess-precision=standard and -ffloat-store both respect assignment and musl use these flags by default. i kept the macro for now so the workaround may be used for bad compilers in the future.
2012-11-13PPC port cleaned up, static linking works well now.rofl0r17-112/+321
2012-11-13import preliminary ppc work by rdp.Richard Pennington8-0/+126
2012-11-13math: use '#pragma STDC FENV_ACCESS ON' when fenv is accessedSzabolcs Nagy10-0/+11
2012-11-13math: excess precision fix modf, modff, scalbn, scalbnfSzabolcs Nagy4-22/+18
old code was correct only if the result was stored (without the excess precision) or musl was compiled with -ffloat-store. now we use STRICT_ASSIGN to work around the issue. (see note 160 in c11 section 6.8.6.4)
2012-11-13math: fix scalbn and scalbnf on overflow/underflowSzabolcs Nagy2-10/+24
old code was correct only if the result was stored (without the excess precision) or musl was compiled with -ffloat-store. (see note 160 in n1570.pdf section 6.8.6.4)
2012-11-13math: fix nextafter and nexttoward on maxdbl and maxflt inputSzabolcs Nagy4-4/+4
old code (return x+x;) returns correct value and raises correct flags only if the result is stored as double (or float)
2012-11-13complex: add C11 CMPLX macros and replace cpack with themSzabolcs Nagy46-156/+143
2012-11-13math: raise flags in logl.c on <= 0 argumentsSzabolcs Nagy2-9/+3
2012-11-13math: fix logb*.c exceptions now that ilogb raises invalidSzabolcs Nagy3-25/+17
2012-11-13math: raise flags in log2l.c on <= 0 arguments, and fix volatileSzabolcs Nagy1-8/+3
2012-11-13math: raise exception flags in log1pl.c on <= -1 argumentsSzabolcs Nagy1-7/+2
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