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* abstract out compiler runtime library for linking libc.soRich Felker2012-08-021-1/+2
| | | | | this allows config.mak to override the default -lgcc for building with other compilers such as pcc/clang/etc.
* fix argument type error on wcwidth functionRich Felker2012-08-021-2/+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.
* fix missing static in getusershell (namespace pollution)Rich Felker2012-08-021-1/+1
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* optimize mempcpy to minimize need for data saved across the callRich Felker2012-07-311-2/+1
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* optimize arm setjmp/longjmp register saving/loadingRich Felker2012-07-272-6/+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.
* save AT_HWCAP from auxv for subsequent use in machine-specific codeRich Felker2012-07-273-0/+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.
* retry on cas failures in sem_trywaitRich Felker2012-07-241-2/+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.
* gcc wrapper improvement: leave libgcc dir in the library pathRich Felker2012-07-231-1/+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.
* add ioperm/iopl syscallsRich Felker2012-07-233-0/+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...
* add splice and vmsplice syscallsRich Felker2012-07-233-0/+28
| | | | based on patches by orc and Isaac Dunham.
* add extended attributes syscallsRich Felker2012-07-232-0/+74
| | | | based on patch by orc and Isaac Dunham, with some fixes.
* add pipe2 syscallRich Felker2012-07-232-0/+9
| | | | based on patch by orc and Isaac Dunham, with some details fixed.
* remove scanf dependency from getaddrinfo /etc/services supportRich Felker2012-07-221-5/+4
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* getaddrinfo /etc/services lookup supportRich Felker2012-07-221-3/+16
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* fix namespace issue in prototypes in math.hRich Felker2012-07-221-2/+2
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* fix wrong size for sigjmp_buf signal set arrayRich Felker2012-07-221-1/+1
| | | | 128 is the size in bytes, not longs.
* add floating point register saving/restoring to mips setjmp/longjmpRich Felker2012-07-223-2/+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.
* make getservby*_r return error code rather than -1 (and using errno)Rich Felker2012-07-222-19/+35
| | | | untested but should be correct..
* fix logic error for skipping failed interfaces in if_nameindexRich Felker2012-07-211-8/+7
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* fix typo in aio.hRich Felker2012-07-191-1/+1
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* fix getservby*() with null pointer for protocol argumentRich Felker2012-07-142-0/+8
| | | | not sure this is the best fix but it should work
* avoid blx instruction which does not exist on armv4t or armv4Rich Felker2012-07-141-1/+2
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* make dynamic linker tell the debugger its own pathnameRich Felker2012-07-131-0/+5
| | | | | use the main program's PT_INTERP header if possible, since this is sure to be a correct (and hopefully absolute) pathname.
* fix broken mips a_fetch_addRich Felker2012-07-121-7/+7
| | | | sc was overwriting the result
* sigsetjmp asm for mipsRich Felker2012-07-121-0/+27
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* mipsel (little endian) supportRich Felker2012-07-121-1/+1
| | | | | | the fields in the mcontext_t are long long (for no good reason) even on 32-bit mips, so the offset of the instruction pointer (as a word) varies depending on endianness.
* workaround another sendmsg kernel bug on 64-bit machinesRich Felker2012-07-126-7/+42
| | | | | | | | | the kernel wrongly expects the cmsg length field to be size_t instead of socklen_t. in order to work around the issue, we have to impose a length limit and copy to a local buffer. the length limit should be more than sufficient for any real-world use; these headers are only used for passing file descriptors and permissions between processes over unix sockets.
* fix redef of sigprocmask constants on mipsRich Felker2012-07-122-2/+3
| | | | this fix is easier than trying to reorder the header stuff
* disable dynamic linking on mips for now (broken)Rich Felker2012-07-121-0/+5
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* more mips bits-header fixesRich Felker2012-07-122-2/+8
| | | | signal handling was very broken because of this
* fix mips syscalls with long long argsRich Felker2012-07-121-1/+1
| | | | | like arm, mips requires 64-bit arguments to be "aligned" on an even register boundary.
* fix several locks that weren't updated right for new futex-based __lockRich Felker2012-07-124-10/+10
| | | | | | these could have caused memory corruption due to invalid accesses to the next field. all should be fixed now; I found the errors with fgrep -r '__lock(&', which is bogus since the argument should be an array.
* fix pthread_kill unlockingRich Felker2012-07-121-1/+1
| | | | it had not been updated for the futex-based locks
* fix breakage of x86_64 sigaction from recent changes for mipsRich Felker2012-07-121-1/+1
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* fix mips mcontext_t structure sizeRich Felker2012-07-121-1/+5
| | | | | otherwise offs in ucontext_t will be wrong, and break code that inspects or modifies the signal makes (including cancellation code).
* fix potential race condition in detached threadsRich Felker2012-07-112-4/+10
| | | | | | | after the thread unmaps its own stack/thread structure, the kernel, performing child tid clear and futex wake, could clobber a new mapping made at the same location as the just-removed thread's tid field. disable kernel clearing of child tid to prevent this.
* mips clone: don't free stack space used to copy argRich Felker2012-07-111-1/+0
| | | | | | the mips abi reserves stack space equal to the size of the in-register args for the callee to save the args, if desired. this would cause the beginning of the thread structure to be clobbered...
* fix mips clone() on real linux kernelRich Felker2012-07-111-4/+7
| | | | | | the old code worked in qemu app-level emulation, but not on real kernels where the clone syscall does not copy the register values to the new thread. save arguments on the new thread stack instead.
* fix MAP_ANONYMOUS value for mips, remove cruft copied from i386Rich Felker2012-07-111-2/+1
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* fix clone() on mips (args were in wrong order)Rich Felker2012-07-111-3/+2
| | | | with this change, threads on mips seem to be working
* first attempt at making threads work on mipsRich Felker2012-07-113-0/+67
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* generic c version of __set_thread_area for archs where it worksRich Felker2012-07-111-1/+5
| | | | on other archs, like x86[_64], asm version is required
* initial version of mips (o32) port, based on work by Richard Pennington (rdp)Rich Felker2012-07-1138-0/+2196
| | | | | | | | | | | | | basically, this version of the code was obtained by starting with rdp's work from his ellcc source tree, adapting it to musl's build system and coding style, auditing the bits headers for discrepencies with kernel definitions or glibc/LSB ABI or large file issues, fixing up incompatibility with the old binutils from aboriginal linux, and adding some new special cases to deal with the oddities of sigaction and pipe syscall interfaces on mips. at present, minimal test programs work, but some interfaces are broken or missing. threaded programs probably will not link.
* remove unused var in new sigaction codeRich Felker2012-07-111-1/+1
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* use unsigned bitmask for consistency in ksigactionRich Felker2012-07-111-1/+1
| | | | | the type doesn't actually matter, just the size, but it's nice to be consistent...
* fix breakage from last commit: forgot to include ksigaction.hRich Felker2012-07-111-0/+6
| | | | this file can be overridden by a same-named file in an arch dir.
* changes to kernel sigaction struct handling in preparation for mips portRich Felker2012-07-113-15/+18
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* make dynamic linker depend on -DSHARED not -fPICRich Felker2012-07-111-1/+1
| | | | | | if libc.a is compiled PIC for use in static PIE code, this should not cause the dynamic linker (which still does not support static-linked main program) to be built into libc.a.
* fix lots of breakage on dlopen, mostly with explicit pathnamesRich Felker2012-07-111-14/+21
| | | | | | | | | | | | | | | | | | most importantly, the name for such libs was being set from an uninitialized buffer. also, shortname always had an initial '/' character, making it useless for looking up already-loaded libraries by name, and thus causing repeated searches through the library path. major changes now: - shortname is the base name for library lookups with no explicit pathname. it's initially clear for libraries loaded with an explicit pathname (and for the main program), but will be set if the same library (detected via inodes match) is later found by a search. - exact name match is never used to identify libraries loaded with an explicit pathname. in this case, there's no explicit search, so we can just stat the file and check for inode match.
* support -mfpmath=387 on x86_64Rich Felker2012-07-101-0/+4
| | | | apparently somebody wants this for something... and it doesn't hurt.
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