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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.
2012-08-02fix 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.
2012-07-23add ioperm/iopl syscallsRich Felker-0/+18
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/+16
based on patches by orc and Isaac Dunham.
2012-07-23add extended attributes syscallsRich Felker-0/+47
based on patch by orc and Isaac Dunham, with some fixes.
2012-07-23add pipe2 syscallRich Felker-0/+8
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
2012-07-22add floating point register saving/restoring to mips setjmp/longjmpRich Felker-1/+29
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
2012-07-14fix 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.
2012-07-12sigsetjmp asm for mipsRich Felker-0/+27
2012-07-12workaround another sendmsg kernel bug on 64-bit machinesRich Felker-0/+13
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.
2012-07-12fix several locks that weren't updated right for new futex-based __lockRich Felker-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.
2012-07-12fix pthread_kill unlockingRich Felker-1/+1
it had not been updated for the futex-based locks
2012-07-12fix breakage of x86_64 sigaction from recent changes for mipsRich Felker-1/+1
2012-07-11fix potential race condition in detached threadsRich Felker-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.
2012-07-11mips clone: don't free stack space used to copy argRich Felker-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...
2012-07-11fix mips clone() on real linux kernelRich Felker-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.
2012-07-11fix clone() on mips (args were in wrong order)Rich Felker-3/+2
with this change, threads on mips seem to be working
2012-07-11first attempt at making threads work on mipsRich Felker-0/+67
2012-07-11generic c version of __set_thread_area for archs where it worksRich Felker-1/+5
on other archs, like x86[_64], asm version is required
2012-07-11initial version of mips (o32) port, based on work by Richard Pennington (rdp)Rich Felker-0/+105
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.
2012-07-11remove unused var in new sigaction codeRich Felker-1/+1
2012-07-11use unsigned bitmask for consistency in ksigactionRich Felker-1/+1
the type doesn't actually matter, just the size, but it's nice to be consistent...
2012-07-11fix breakage from last commit: forgot to include ksigaction.hRich Felker-0/+6
this file can be overridden by a same-named file in an arch dir.
2012-07-11changes to kernel sigaction struct handling in preparation for mips portRich Felker-14/+17
2012-07-11make dynamic linker depend on -DSHARED not -fPICRich Felker-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.
2012-07-11fix lots of breakage on dlopen, mostly with explicit pathnamesRich Felker-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.
2012-07-07fix dlsym RTLD_NEXT supportRich Felker-1/+3
previously this was being handled the same as a library-specific, dependency-order lookup on the next library in the global chain, which is likely to be utterly meaningless. instead the lookup needs to be in the global namespace, but omitting the initial portion of the global library chain up through the calling library.
2012-07-04putw is supposed to return 0 (not the value written) on successRich Felker-1/+1
this is not a standard but it's the traditional behavior and it's more useful because the caller can reliably detect errors.
2012-07-04make sure getw/putw agree with prototypes by defining _GNU_SOURCERich Felker-0/+2
2012-07-03jmp_buf overhaul fixing several issuesRich Felker-10/+7
on arm, the location of the saved-signal-mask flag and mask were off by one between sigsetjmp and siglongjmp, causing incorrect behavior restoring the signal mask. this is because the siglongjmp code assumed an extra slot was in the non-sig jmp_buf for the flag, but arm did not have this. now, the extra slot is removed for all archs since it was useless. also, arm eabi requires jmp_buf to have 8-byte alignment. we achieve that using long long as the type rather than with non-portable gcc attribute tags.
2012-07-02fix sigsetjmp on arm (needs asm)Rich Felker-0/+13
no idea why gcc refuses to compile the C code to use a tail call, but it's best to use asm anyway so we don't have to rely on the quality of the compiler's optimizations for correct code.
2012-07-02fix missing function declarations for __stdio_exitRich Felker-0/+4
2012-07-02fix missing prototype and simplify sincosl on ld64 archsRich Felker-4/+2
2012-07-02fix invalid implicit pointer conversion in ld64 modflRich Felker-1/+1
2012-06-29replace old and ugly crypt implementationRich Felker-2574/+1055
the new version is largely the work of Solar Designer, with minor changes for integration with musl. compared to the old code, text size is reduced by about 7k, stack space usage by about 70k, and performance is greatly improved by avoiding expensive calculation of constant tables on each run. this version also adds support for extended des-based password hashes, which allow for unlimited key (password) length and configurable iteration counts. i've also published the interface for crypt_r in a new crypt.h header. especially since this is not a standard interface, i did not feel compelled to match the glibc abi for the crypt_data structure. the glibc structure is way too big to allocate on the stack; in fact it's so big that the first usage may cause the main thread to exceed its pre-committed stack size of 128k and thus could cause the program to crash even on systems with overcommit disabled. the only legitimate use of crypt_data for crypt_r is to store the hash string to return, so i've reserved 256 bytes, which should be more than sufficient (longest known password hashes are ~60 characters, and beyond that is possibly even exceeding some implementations' passwd file field size limit).
2012-06-23add process_vm_readv and process_vm_writev syscall wrappersRich Felker-0/+13
based on a patch submitted by Kristian L. <email@thexception.net>
2012-06-20proper error handling for fcntl F_GETOWN on modern kernelsRich Felker-1/+9
on old kernels, there's no way to detect errors; we must assume negative syscall return values are pgrp ids. but if the F_GETOWN_EX fcntl works, we can get a reliable answer.
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