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* move struct semid_ds to from shared sys/sem.h to bitsRich Felker2014-03-118-0/+128
| | | | | | | | | | | | 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.
* add bits/user.h for sh portRich Felker2014-03-081-0/+75
| | | | | this seems to have been overlooked, and resulted in breakage in anything including sys/user.h.
* x32: fix sysinfo()rofl0r2014-03-061-0/+47
| | | | | | | | 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.
* add nofpu subarchs to the sh arch, and properly detect compiler's fpu configRich Felker2014-02-271-0/+9
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* fix endian subarchs for sh archRich Felker2014-02-272-5/+5
| | | | | default endianness for sh on linux is little, and while conventions vary, "eb" seems to be the most widely used suffix for big endian.
* rename superh port to "sh" for consistencyRich Felker2014-02-2730-0/+0
| | | | | | | | | 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.
* mips: add mips-sf subarch support (soft-float)Szabolcs Nagy2014-02-242-1/+12
| | | | | | | | | 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.
* fixup general __syscall breakage introduced in x32 portrofl0r2014-02-243-0/+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.
* make the x32 port use the correct ld-musl-x32.path filenameRich Felker2014-02-231-1/+1
| | | | | previously it was wrongly using the x86_64 one, precluding having both x32 and x86_64 libs present on the same system.
* superh portBobby Bingham2014-02-2330-0/+1950
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* fix x32 syscall arch.h timespec fixup coderofl0r2014-02-231-53/+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.
* fix some issues in x32 syscall_cp_fixuprofl0r2014-02-231-11/+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.
* mostly-cosmetic fixups to x32 port mergeRich Felker2014-02-231-1/+1
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* x32 port (diff against vanilla x86_64)rofl0r2014-02-2313-679/+762
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* import vanilla x86_64 code as x32rofl0r2014-02-2330-0/+1986
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* sys/shm.h: move arch specific structs to bits/rofl0r2014-02-236-0/+66
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* remove more unnecessary operand-size suffixes from x86_64 atomic.hRich Felker2014-01-151-3/+3
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* remove gratuitous temp vars, casts, and suffixes in x86_64 atomic.hRich Felker2014-01-111-13/+11
| | | | | aside from general cleanup, this should allow the identical atomic.h file to be used for the upcoming x32 port.
* remove size suffix in x86_64 __pthread_self asmRich Felker2014-01-111-1/+1
| | | | | | the operand size is unnecessary, since the assembler knows it from the destination register size. removing the suffix makes it so the same code should work for x32.
* make type of st_dev explicitly dev_t in x86_64 stat.hRich Felker2014-01-111-1/+1
| | | | | | otherwise it's unclear that it's correct. aside from that, it makes for a gratuitous difference between the x86_64 header and the upcoming x32 header.
* add IUTF8 to termios.h on archs that were missing itRich Felker2014-01-084-0/+4
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* fix namespace violations in termios.h, at least mostlyRich Felker2014-01-086-52/+49
| | | | | | the fix should be complete on archs that use the generic definitions (i386, arm, x86_64, microblaze), but mips and powerpc have not been checked thoroughly and may need more fixes.
* workaround clang deficiency affecting thread pointer access on powerpcRich Felker2013-12-021-1/+6
| | | | | based on patch by Richard Pennington, who initially reported the issue.
* add O_TMPFILE flag, new in linux 3.11Szabolcs Nagy2013-11-236-0/+6
| | | | | | definition in linux: #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY) where __O_TMPFILE and O_DIRECTORY are arch specific
* fix the nominal type of LDBL_* limits on archs with ld64Rich Felker2013-11-204-16/+16
| | | | | | | | | | | previously these macros wrongly had type double rather than long double. I see no way an application could detect the error in C99, but C11's _Generic can trivially detect it. at the same time, even though these archs do not have excess precision, the number of decimal places used to represent these constants has been increased to 21 to be consistent with the decimal representations used for the DBL_* macros.
* add missing i386 syscall numbersRich Felker2013-09-261-0/+10
| | | | somehow the range 335-339 was missed when updating the file.
* remove duplicate lines from mips bits/syscall.hRich Felker2013-09-261-48/+0
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* fix arm atomic store and generate simpler/less-bloated/faster codeRich Felker2013-09-221-6/+8
| | | | | | | | | | | | | | | | atomic store was lacking a barrier, which was fine for legacy arm with no real smp and kernel-emulated cas, but unsuitable for more modern systems. the kernel provides another "kuser" function, at 0xffff0fa0, which could be used for the barrier, but using that would drop support for kernels 2.6.12 through 2.6.14 unless an extra conditional were added to check for barrier availability. just using the barrier in the kernel cas is easier, and, based on my reading of the assembly code in the kernel, does not appear to be significantly slower. at the same time, other atomic operations are adapted to call the kernel cas function directly rather than using a_cas; due to small differences in their interface contracts, this makes the generated code much simpler.
* support configurable page size on mips, powerpc and microblazeSzabolcs Nagy2013-09-156-6/+3
| | | | | | | | | | | | | | | | PAGE_SIZE was hardcoded to 4096, which is historically what most systems use, but on several archs it is a kernel config parameter, user space can only know it at execution time from the aux vector. PAGE_SIZE and PAGESIZE are not defined on archs where page size is a runtime parameter, applications should use sysconf(_SC_PAGE_SIZE) to query it. Internally libc code defines PAGE_SIZE to libc.page_size, which is set to aux[AT_PAGESZ] in __init_libc and early in __dynlink as well. (Note that libc.page_size can be accessed without GOT, ie. before relocations are done) Some fpathconf settings are hardcoded to 4096, these should be actually queried from the filesystem using statfs.
* fix mips sysv ipc bits headersRich Felker2013-09-142-3/+9
| | | | | | | msg.h was wrong for big-endian (wrong endiannness padding). shm.h was just plain wrong (mips is not supposed to have padding). both changes were tested using libc-test on qemu-system-mips.
* remove the __mxcsr member from fenv_t on i386 to follow the glibc abiSzabolcs Nagy2013-08-181-1/+0
| | | | | | in the previous commit sse fenv support was added, but there is no need to save mxcsr (sse fenv register) so fix the abi incompatibility with glibc.
* fix detection of arm hardfloatRich Felker2013-08-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | it turns out that __SOFTFP__ does not indicate the ABI in use but rather that fpu instructions are not to be used at all. this is specified in ARM's documentation so I'm unclear on how I previously got the wrong idea. unfortunately, this resulted in the 0.9.12 release producing a dynamic linker with the wrong name. fortunately, there do not yet seem to be any public toolchain builds using the wrong name. the __ARM_PCS_VFP macro does not seem to be official from ARM, and in fact it was missing from the very earliest gcc versions (around 4.5.x) that added -mfloat-abi=hard. it would be possible on such versions to perform some ugly linker-based tests instead in hopes that the linker will reject ABI-mismatching object files, if there is demand for supporting such versions. I would probably prefer to document which versions are broken and warn users to manually add -D__ARM_PCS_VFP if using such a version. there's definitely an argument to be made that the fenv macros should be exposed even in -mfloat-abi=softfp mode. for now, I have chosen not to expose them in this case, since the math library will not necessarily have the capability to raise exceptions (it depends on the CFLAGS used to compile it), and since exceptions are officially excluded from the ARM EABI, which the plain "arm" arch aims to follow.
* support floating point environment (fenv) on armhf (hard float) subarchsRich Felker2013-08-161-0/+13
| | | | | patch by nsz. I've tested it on an armhf machine and it seems to be working correctly.
* add function types to arm crt assemblyRich Felker2013-08-151-0/+1
| | | | | | | | | without these, calls may be resolved incorrectly if the calling code has been compiled to thumb instead of arm. it's not clear to me at this point whether crt_arch.h is even working if crt1.c is built as thumb; this needs testing. but the _init and _fini issues were known to cause crashes in static-linked apps when libc was built as thumb, and this commit should fix that issue.
* add missing a_or_l to atomic.h for non-x86 archsRich Felker2013-08-114-0/+20
| | | | this is needed for recently committed sigaction code
* fix _NSIG and SIGRTMAX on mipsRich Felker2013-08-101-1/+1
| | | | | | | | | | | | | | | | | | | | | a mips signal mask contains 128 bits, enough for signals 1 through 128. however, the exit status obtained from the wait-family functions only has room for values up to 127. reportedly signal 128 was causing kernelspace bugs, so it was removed from the kernel recently; even without that issue, however, it was impossible to support it correctly in userspace. at the same time, the bug was masked on musl by SIGRTMAX incorrectly yielding 64 on mips, rather than the "correct" value of 128. now that the _NSIG issue is fixed, SIGRTMAX can be fixed at the same time, exposing the full range of signals for application use. note that the (nonstandardized) libc _NSIG value is actually one greater than the max signal number, and also one greater than the kernel headers' idea of _NSIG. this is the reason for the discrepency with the recent kernel changes. since reducing _NSIG by one brought it down from 129 to 128, rather than from 128 to 127, _NSIG/8, used widely in the musl sources, is unchanged.
* fix powerpc build breakage from dynamic linker path search changesRich Felker2013-07-261-1/+1
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* new mostly-C crt1 implementationRich Felker2013-07-266-0/+75
| | | | | | | | | | | | | | | the only immediate effect of this commit is enabling PIE support on some archs that did not previously have any Scrt1.s, since the existing asm files for crt1 override this C code. so some of the crt_arch.h files committed are only there for the sake of documenting what their archs "would do" if they used the new C-based crt1. the expectation is that new archs should use this new system rather than using heavy asm for crt1. aside from being easier and less error-prone, it also ensures that PIE support is available immediately (since Scrt1.o is generated from the same C source, using -fPIC) rather than having to be added as an afterthought in the porting process.
* change jmp_buf to share an underlying type and struct tag with sigjmp_bufRich Felker2013-07-246-6/+6
| | | | | | | | | | this is necessary to meet the C++ ABI target. alternatives were considered to avoid the size increase for non-sig jmp_buf objects, but they seemed to have worse properties. moreover, the relative size increase is only extreme on x86[_64]; one way of interpreting this is that, if the size increase from this patch makes jmp_buf use too much memory, then the program was already using too much memory when built for non-x86 archs.
* remove SIG_ATOMIC_MIN/MAX from stdint bits headersRich Felker2013-07-225-10/+0
| | | | i386 was done with the big commit but I missed the others
* fix regression in size of nlink_t (broken stat struct) on x86_64Rich Felker2013-07-226-0/+6
| | | | | | | | rather than moving nlink_t back to the arch-specific file, I've added a macro _Reg defined to the canonical type for register-size values on the arch. this is not the same as _Addr for (not-yet-supported) 32-on-64 pseudo-archs like x32 and mips n32, so a new macro was needed.
* disable legacy init/fini processing on ARMRich Felker2013-07-221-0/+2
| | | | | | | | | | | since the old, poorly-thought-out musl approach to init/fini arrays on ARM (when it was the only arch that needed them) was to put the code in crti/crtn and have the legacy _init/_fini code run the arrays, adding proper init/fini array support caused the arrays to get processed twice on ARM. I'm not sure skipping legacy init/fini processing is the best solution to the problem, but it works, and it shouldn't break anything since the legacy init/fini system was never used for ARM EABI.
* change wint_t to unsignedRich Felker2013-07-226-6/+6
| | | | | | | | | | | | aside from the obvious C++ ABI purpose for this change, it also brings musl into alignment with the compiler's idea of the definition of wint_t (use in -Wformat), and makes the situation less awkward on ARM, where wchar_t is unsigned. internal code using wint_t and WEOF was checked against this change, and while a few cases of storing WEOF into wchar_t were found, they all seem to operate properly with the natural conversion from unsigned to signed.
* refactor headers, especially alltypes.h, and improve C++ ABI compatRich Felker2013-07-2218-814/+181
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the arch-specific bits/alltypes.h.sh has been replaced with a generic alltypes.h.in and minimal arch-specific bits/alltypes.h.in. this commit is intended to have no functional changes except: - exposing additional symbols that POSIX allows but does not require - changing the C++ name mangling for some types - fixing the signedness of blksize_t on powerpc (POSIX requires signed) - fixing the limit macros for sig_atomic_t on x86_64 - making dev_t an unsigned type (ABI matching goal, and more logical) in addition, some types that were wrongly defined with long on 32-bit archs were changed to int, and vice versa; this change is non-functional except for the possibility of making pointer types mismatch, and only affects programs that were using them incorrectly, and only at build-time, not runtime. the following changes were made in the interest of moving non-arch-specific types out of the alltypes system and into the headers they're associated with, and also will tend to improve application compatibility: - netdb.h now includes netinet/in.h (for socklen_t and uint32_t) - netinet/in.h now includes sys/socket.h and inttypes.h - sys/resource.h now includes sys/time.h (for struct timeval) - sys/wait.h now includes signal.h (for siginfo_t) - langinfo.h now includes nl_types.h (for nl_item) for the types in stdint.h: - types which are of no interest to other headers were moved out of the alltypes system. - fast types for 8- and 64-bit are hard-coded (at least for now); only the 16- and 32-bit ones have reason to vary by arch. and the following types have been changed for C++ ABI purposes; - mbstate_t now has a struct tag, __mbstate_t - FILE's struct tag has been changed to _IO_FILE - DIR's struct tag has been changed to __dirstream - locale_t's struct tag has been changed to __locale_struct - pthread_t is defined as unsigned long in C++ mode only - fpos_t now has a struct tag, _G_fpos64_t - fsid_t's struct tag has been changed to __fsid_t - idtype_t has been made an enum type (also required by POSIX) - nl_catd has been changed from long to void * - siginfo_t's struct tag has been removed - sigset_t's has been given a struct tag, __sigset_t - stack_t has been given a struct tag, sigaltstack - suseconds_t has been changed to long on 32-bit archs - [u]intptr_t have been changed from long to int rank on 32-bit archs - dev_t has been made unsigned summary of tests that have been performed against these changes: - nsz's libc-test (diff -u before and after) - C++ ABI check symbol dump (diff -u before, after, glibc) - grepped for __NEED, made sure types needed are still in alltypes - built gcc 3.4.6
* change uid_t, gid_t, and id_t to unsigned typesRich Felker2013-07-196-18/+18
| | | | | | | | | this change is both to fix one of the remaining type (and thus C++ ABI) mismatches with glibc/LSB and to allow use of the full range of uid and gid values, if so desired. passwd/group access functions were not prepared to deal with unsigned values, so they too have been fixed with this commit.
* make the dynamic linker find its path file relative to its own locationRich Felker2013-07-186-6/+33
| | | | | | | | | | | | | | | | | | | prior to this change, using a non-default syslibdir was impractical on systems where the ordinary library paths contain musl-incompatible library files. the file containing search paths was always taken from /etc, which would either correspond to a system-wide musl installation, or fail to exist at all, resulting in searching of the default library path. the new search strategy is safe even for suid programs because the pathname used comes from the PT_INTERP header of the program being run, rather than any external input. as part of this change, I have also begun differentiating the names of arch variants that differ by endianness or floating point calling convention. the corresponding changes in the build system and and gcc wrapper script (to use an alternate dynamic linker name) for these configurations have not yet been made.
* make spacing in x86_64 alltypes.h.sh more uniform with other archsRich Felker2013-07-171-0/+1
| | | | patch by Luka Perkov, who noted that all other archs have a newline.
* add some ARM EABI-specific exception handling infrastructureRich Felker2013-07-101-0/+42
| | | | patch by Timo Teräs
* add some comments about the mips ksigaction structure weirdnessRich Felker2013-06-291-0/+3
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* respect iso c namespace in stdio.h and wchar.h regarding va_listRich Felker2013-06-256-0/+7
| | | | | | | | | | despite declaring functions that take arguments of type va_list, these headers are not permitted by the c standard to expose the definition of va_list, so an alias for the type must be used. the name __isoc_va_list was chosen to convey that the purpose of this alternate name is for iso c conformance, and to avoid the multitude of names which gcc mangles with its hideous "fixincludes" monstrosity, leading to serious header breakage if these "fixes" are run.
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