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2012-08-10minor but worthwhile optimization in printf: avoid expensive strspnRich Felker-4/+2
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.
2012-08-10trivial optimization to printf: avoid wasted call frameRich Felker-1/+1
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.
2012-08-10use int instead of long for ptrdiff_t on all 32-bit archsRich Felker-2/+2
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.
2012-08-10fix incorrect ptrdiff_t type on mipsRich Felker-1/+1
2012-08-10add blowfish hash support to cryptRich Felker-8/+806
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.
2012-08-09fix (hopefully) all hard-coded 8's for kernel sigset_t sizeRich Felker-20/+31
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.
2012-08-09add defines for number of sigset_t bytes syscalls expectRich Felker-0/+8
yet another gratuitous mips incompatibility...
2012-08-09make crypt return an unmatchable hash rather than NULL on failureRich Felker-5/+2
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.
2012-08-08math: fix exp.s on i386 and x86_64 so the exception flags are correctnsz-40/+35
exp(inf), exp(-inf), exp(nan) used to raise wrong flags
2012-08-07further fixes for mips ioctl.h headerRich Felker-4/+4
untested; hopefully it's right now
2012-08-07fix another mips gratuitous-incompatibility bug: ioctl numbersRich Felker-2/+2
2012-08-07fix bug dlsym bug that slipped in during dynamic linker cleanupRich Felker-1/+1
2012-08-05make configure accept mipselRich Felker-1/+1
2012-08-05dlsym RTLD_NEXT support for mipsRich Felker-0/+15
untested
2012-08-05fix socket.h on mipsRich Felker-0/+6
why does mips have to be gratuitously incompatible in every possible imaginable way?
2012-08-05align mips _init/_fini functionsRich Felker-0/+2
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.
2012-08-05more changes that were lost when committing mips dynamic linkerRich Felker-0/+4
2012-08-05more stuff lost committing mips dynamic linkerRich Felker-2/+2
2012-08-05fix change lost in the process of integrating mips dynamic linkerRich Felker-2/+2
2012-08-05remove configure check disabling shared libraries on mipsRich Felker-4/+0
2012-08-05mips dynamic linker supportRich Felker-3/+102
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.
2012-08-05make dynlink.lo depend on reloc.h in makefileRich Felker-0/+2
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".
2012-08-05more cleanup of dynamic linker internalsRich Felker-8/+9
2012-08-05more dynamic linker internals cleanupRich Felker-6/+6
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.
2012-08-05dynamic linker internals cleanupRich Felker-5/+7
2012-08-05floating point support for arm setjmp/longjmpRich Felker-2/+54
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.
2012-08-02release notes for 0.9.3v0.9.3Rich Felker-0/+35
2012-08-02abstract out compiler runtime library for linking libc.soRich Felker-1/+2
this allows config.mak to override the default -lgcc for building with other compilers such as pcc/clang/etc.
2012-08-02fix argument type error on wcwidth functionRich Felker-2/+2
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.
2012-08-02fix missing static in getusershell (namespace pollution)Rich Felker-1/+1
2012-07-31optimize mempcpy to minimize need for data saved across the callRich Felker-2/+1
2012-07-27optimize arm setjmp/longjmp register saving/loadingRich Felker-6/+2
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.
2012-07-27save AT_HWCAP from auxv for subsequent use in machine-specific codeRich Felker-0/+4
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.
2012-07-24retry on cas failures in sem_trywaitRich Felker-2/+2
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.
2012-07-23gcc wrapper improvement: leave libgcc dir in the library pathRich Felker-1/+1
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.
2012-07-23add ioperm/iopl syscallsRich Felker-0/+31
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...
2012-07-23add splice and vmsplice syscallsRich Felker-0/+28
based on patches by orc and Isaac Dunham.
2012-07-23add extended attributes syscallsRich Felker-0/+74
based on patch by orc and Isaac Dunham, with some fixes.
2012-07-23add pipe2 syscallRich Felker-0/+9
based on patch by orc and Isaac Dunham, with some details fixed.
2012-07-22remove scanf dependency from getaddrinfo /etc/services supportRich Felker-5/+4
2012-07-22getaddrinfo /etc/services lookup supportRich Felker-3/+16
2012-07-22fix namespace issue in prototypes in math.hRich Felker-2/+2
2012-07-22fix wrong size for sigjmp_buf signal set arrayRich Felker-1/+1
128 is the size in bytes, not longs.
2012-07-22add floating point register saving/restoring to mips setjmp/longjmpRich Felker-2/+30
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.
2012-07-22make getservby*_r return error code rather than -1 (and using errno)Rich Felker-19/+35
untested but should be correct..
2012-07-21fix logic error for skipping failed interfaces in if_nameindexRich Felker-8/+7
2012-07-19fix typo in aio.hRich Felker-1/+1
2012-07-14fix getservby*() with null pointer for protocol argumentRich Felker-0/+8
not sure this is the best fix but it should work
2012-07-14avoid blx instruction which does not exist on armv4t or armv4Rich Felker-1/+2
2012-07-13make dynamic linker tell the debugger its own pathnameRich Felker-0/+5
use the main program's PT_INTERP header if possible, since this is sure to be a correct (and hopefully absolute) pathname.