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2014-03-11move struct semid_ds to from shared sys/sem.h to bitsRich Felker-16/+129
the definition was found to be incorrect at least for powerpc, and fixing this cleanly requires making the definition arch-specific. this will allow cleaning up the definition for other archs to make it more specific, and reversing some of the ugliness (time_t hacks) introduced with the x32 port. this first commit simply copies the existing definition to each arch without any changes. this is intentional, to make it easier to review changes made on a per-arch basis.
2014-03-09math.h: make __FLOAT_BITS and __DOUBLE_BITS C89Szabolcs Nagy-2/+4
Remove non-constant aggregate initializer. (Still using long long, but that is supported by ancient compilers without __extension__ anyway).
2014-03-09fix incorrect rounding in printf floating point corner casesRich Felker-2/+2
the printf floating point formatting code contains an optimization to avoid computing digits that will be thrown away by rounding at the specified (or default) precision. while it was correctly retaining all places up to the last decimal place to be printed, it was not retaining enough precision to see the next nonzero decimal place in all cases. this could cause incorrect rounding down in round-to-even (default) rounding mode, for example, when printing 0.5+DBL_EPSILON with "%.0f". in the fix, LDBL_MANT_DIG/3 is a lazy (non-sharp) upper bound on the number of zeros between any two nonzero decimal digits.
2014-03-09fix buffer overflow in printf formatting of denormals with low bit setRich Felker-1/+2
empirically the overflow was an off-by-one, and it did not seem to be overwriting meaningful data. rather than simply increasing the buffer size by one, however, I have attempted to make the size obviously correct in terms of bounds on the number of iterations for the loops that fill the buffer. this still results in no more than a negligible size increase of the buffer on the stack (6-7 32-bit slots) and is a "safer" fix unless/until somebody wants to do the proof that a smaller buffer would suffice.
2014-03-08in sys/procfs.h, avoid using __WORDSIZE macroRich Felker-1/+1
this was problematic because several archs don't define __WORDSIZE. we could add it, but I would rather phase this macro out in the long term. in our version of the headers, UINTPTR_MAX is available here, so just use it instead.
2014-03-08add bits/user.h for sh portRich Felker-0/+75
this seems to have been overlooked, and resulted in breakage in anything including sys/user.h.
2014-03-07in fcntl, use unsigned long instead of long for variadic argument typeRich Felker-2/+2
neither is correct; different commands take different argument types, and some take no arguments at all. I have a much larger overhaul of fcntl prepared to address this, but it's not appropriate to commit during freeze. the immediate problem being addressed affects forward-compatibility on x32: if new commands are added and they take pointers, but the libc-level fcntl function is not aware of them, using long would sign-extend the pointer to 64 bits and give the kernel an invalid pointer. on the kernel side, the argument to fcntl is always treated as unsigned long, so no harm is done by treating possibly-signed integer arguments as unsigned. for every command that takes an integer argument except for F_SETOWN, large integer arguments and negative arguments are handled identically anyway. in the case of F_SETOWN, the kernel is responsible for converting the argument which it received as unsigned long to int, so the sign of negative arguments is recovered. the other problem that will be addressed later is that the type passed to va_arg does not match the type in the caller of fcntl. an advanced compiler doing cross-translation-unit analysis could potentially see this mismatch and issue warnings or otherwise make trouble. on i386, this patch was confirmed not to alter the code generated by gcc 4.7.3. in principle the generated code should not be affected on any arch except x32.
2014-03-06update copyright dates to 2014Rich Felker-2/+2
2014-03-06x32: fix sysinfo()rofl0r-0/+52
the kernel uses long longs in the struct, but the documentation says they're long. so we need to fixup the mismatch between the userspace and kernelspace structs. since the struct offers a mem_unit member, we can avoid truncation by adjusting that value.
2014-03-05fix strerror on mips: one error code is out of the 8-bit table rangeRich Felker-1/+7
if we ever encounter other targets where error codes don't fit in the 8-bit range, the table should probably just be bumped to 16-bit, but for now I don't want to increase the table size on all archs just because of a bug in the mips abi.
2014-02-28improve configure's target arch matchingRich Felker-4/+6
most notably, it was failing to match sh4-*, etc., but in general the explicit matching of hyphens for some archs was problematic because it failed to accept simply the musl-style arch name (without a gcc-style tuple) as an input. the original motivation of matching hyphens was to prevent incorrectly identifying a 64-bit arch as the corresponding 32-bit arch (e.g. mips* matching mips64) but this is easily fixed by simply checking (and for now, rejecting as unsupported) the relevant 64-bit archs.
2014-02-28fix missing CFLAGS in configure test for float on shRich Felker-1/+1
2014-02-27fix copy-and-paste error in configure's IEEE double check for shRich Felker-1/+1
2014-02-27add nofpu subarchs to the sh arch, and properly detect compiler's fpu configRich Felker-2/+76
2014-02-27fix endian subarchs for sh archRich Felker-7/+7
default endianness for sh on linux is little, and while conventions vary, "eb" seems to be the most widely used suffix for big endian.
2014-02-27rename superh port to "sh" for consistencyRich Felker-2/+2
linux, gcc, etc. all use "sh" as the name for the superh arch. there was already some inconsistency internally in musl: the dynamic linker was searching for "ld-musl-sh.path" as its path file despite its own name being "ld-musl-superh.so.1". there was some sentiment in both directions as to how to resolve the inconsistency, but overall "sh" was favored.
2014-02-25fix readdir not to set ENOENT when directory is removed while readingRich Felker-2/+7
per POSIX, ENOENT is reserved for invalid stream position; it is an optional error and would only happen if the application performs invalid seeks on the underlying file descriptor. however, linux's getdents syscall also returns ENOENT if the directory was removed between the time it was opened and the time of the read. we need to catch this case and remap it to simple end-of-file condition (null pointer return value like an error, but no change to errno). this issue reportedly affects GNU make in certain corner cases. rather than backing up and restoring errno, I've just changed the syscall to be made in a way that doesn't affect errno (via an inline syscall rather than a call to the __getdents function). the latter still exists for the purpose of providing the public getdents alias which sets errno.
2014-02-25in.h: new IP_MTU_DISCOVER mode IP_PMTUDISC_INTERFACESzabolcs Nagy-0/+1
introduced in linux v3.13, 482fc6094afad572a4ea1fd722e7b11ca72022a0 to mitigate dns cache poisoning via fragmentation
2014-02-25if_ether.h: new ethernet protocol typeSzabolcs Nagy-0/+1
for High-availability Seamless Redundancy (HSR) specified in IEC 62439-3 new in linux v3.13, f421436a591d34fa5279b54a96ac07d70250cc8d
2014-02-25sys/socket.h: add the SO_MAX_PACING_RATE SOL_SOCKET optionSzabolcs Nagy-0/+1
introduced in linux v3.13, 62748f32d501f5d3712a7c372bbb92abc7c62bc7
2014-02-25elf.h: add aarch64 relocationsSzabolcs Nagy-0/+111
2014-02-25elf.h: new elf header flag to mark 2008-NaN vs legacy-NaN on mipsSzabolcs Nagy-0/+1
see glibc commit 9c21573c02446b3d5cf6a34b67c8545e5be6a600
2014-02-24add missing sub files for mipsel-sf to use softfloat codeRich Felker-0/+3
the build system has no automatic way to know this code applies to both big (default) and little endian variants, so explicit .sub files are needed.
2014-02-24mips: add mips-sf subarch support (soft-float)Szabolcs Nagy-3/+69
Userspace emulated floating-point (gcc -msoft-float) is not compatible with the default mips abi (assumes an FPU or in kernel emulation of it). Soft vs hard float abi should not be mixed, __mips_soft_float is checked in musl's configure script and there is no runtime check. The -sf subarch does not save/restore floating-point registers in setjmp/longjmp and only provides dummy fenv implementation.
2014-02-24fixup general __syscall breakage introduced in x32 portrofl0r-0/+6
the reordering of headers caused some risc archs to not see the __syscall declaration anymore. this caused build errors on mips with any compiler, and on arm and microblaze with clang. we now declare it locally just like the powerpc port does.
2014-02-23make the x32 port use the correct ld-musl-x32.path filenameRich Felker-1/+1
previously it was wrongly using the x86_64 one, precluding having both x32 and x86_64 libs present on the same system.
2014-02-23superh portBobby Bingham-0/+2350
2014-02-23fix x32 syscall arch.h timespec fixup coderofl0r-53/+49
it's legal to call the __syscall functions with more arguments than necessary, and the __syscall_cp cancel dummy impl. does just that. thus we must insert the switch for all possible syscalls numbers into all of the syscallN inline functions.
2014-02-23fix some issues in x32 syscall_cp_fixuprofl0r-11/+8
- the nanosleep fixup "fixed" the second timespec* argument erroneusly. - the futex fixup was missing the check for FUTEX_WAIT. - general cleanup using a macro.
2014-02-23mostly-cosmetic fixups to x32 port mergeRich Felker-12/+12
2014-02-23configure: suppress bogus pointer-int cast warningsrofl0r-0/+1
2014-02-23configure: recognize x86_64-x32 and x32rofl0r-0/+1
x32 is the internal arch name, but glibc uses x86_64-x32. there doesn't exist a specific triple for x32 in gcc and binutils. you're supposed to build your compiler for x86_64 and configure it with multilib support for "mx32". however it turns out that using a triple of x86_64-x32 makes gcc and binutils pick up the right arch (they detect it as x86_64) and allows us to have a unique triple for cross-compiler toolchains.
2014-02-23x32 port (diff against vanilla x86_64)rofl0r-793/+882
2014-02-23import vanilla x86_64 code as x32rofl0r-0/+2677
2014-02-23sys/shm.h: move arch specific structs to bits/rofl0r-16/+73
2014-02-22sys/sem.h: cheat and make all longs use time_t insteadrofl0r-8/+8
most of the members should be time_t anyway, and time_t has the correct semantics for "syscall_long", so it works on all archs, even x32.
2014-02-22use syscall_arg_t type for syscall prototypes in pthread coderofl0r-3/+8
2014-02-22internal/syscall.h: add syscall_arg_t macrorofl0r-6/+11
some 32-on-64 archs require that the actual syscall args be long long. in that case syscall_arch.h can define syscall_arg_t to whatever it needs and syscall.h picks it up. all other archs just use long as usual.
2014-02-22internal/syscall.h: use a macro for the syscall args castsrofl0r-13/+17
this allows syscall_arch.h to define the macro __scc if special casting is needed, as is the case for x32, where the actual syscall arguments are 64bit, but, in case of pointers, would get sign-extended and thus become invalid.
2014-02-21add fallback emulation for accept4 on old kernelsRich Felker-1/+12
the other atomic FD_CLOEXEC interfaces (dup3, pipe2, socket) already had such emulation in place. the justification for doing the emulation here is the same as for the other functions: it allows applications to simply use accept4 rather than having to have their own fallback code for ENOSYS/EINVAL (which one you get is arch-specific!) and there is no reasonable way an application could benefit from knowing the operation is emulated/non-atomic since there is no workaround at the application level for non-atomicity (that is the whole reason these interfaces were added).
2014-02-18add flock64 alias for (struct) flock in fcntl.hRich Felker-0/+1
this was a missing part of the LFS64 API; it's "needed" for use with fcntl and the corresponding lock commands.
2014-02-13add ipv6 and icmpv6 to getprotoent-family functionsRich Felker-1/+3
based on patch by orc.
2014-02-13fix typo in table for getprotoent that caused out-of-bound readsRich Felker-1/+1
this was unlikely to lead to any crash or dangerous behavior, but caused adjacent string constants to be treated as part of the protocols table, possibly returning nonsensical results for unknown protocol names/numbers or when getprotoent was called in a loop to enumerate all protocols.
2014-02-12make posix_spawn accept null pid pointer argumentsRich Felker-1/+1
this is a requirement in the specification that was overlooked.
2014-02-11add parens when bit and arith ops are mixed in macros in public headersSzabolcs Nagy-2/+2
another commit to silence gcc warnings (-Wparentheses) for standard headers. changed macros: LOG_UPTO, IN6_ARE_ADDR_EQUAL
2014-02-11fix signed and unsigned comparision in macros in public headersSzabolcs Nagy-3/+3
gcc -Wsign-compare warns about expanded macros that were defined in standard headers (before gcc 4.8) which can make builds fail that use -Werror. changed macros: WIFSIGNALED, __CPU_op_S
2014-02-09clone: make clone a wrapper around __cloneBobby Bingham-18/+22
The architecture-specific assembly versions of clone did not set errno on failure, which is inconsistent with glibc. __clone still returns the error via its return value, and clone is now a wrapper that sets errno as needed. The public clone has also been moved to src/linux, as it's not directly related to the pthreads API. __clone is called by pthread_create, which does not report errors via errno. Though not strictly necessary, it's nice to avoid clobbering errno here.
2014-02-09fix fesetenv(FE_DFL_ENV) on x86_64 (see previous commit)Szabolcs Nagy-1/+1
2014-02-09fix fesetenv(FE_DFL_ENV) on i386Szabolcs Nagy-1/+1
the default fenv was not set up properly, in particular the tag word that indicates the contents of the x87 registers was set to 0 (used) instead of 0xffff (empty) this could cause random crashes after setting the default fenv because it corrupted the fpu stack and then any float computation gives NaN result breaking the program logic (usually after a float to integer conversion).
2014-02-07in fdopen, avoid setting O_APPEND flag if it's already setRich Felker-1/+2
this saves a syscall in the case where the underlying open already took place with O_APPEND, which is common because fopen with append modes sets O_APPEND at the time of open before passing the file descriptor to __fdopen.