Commit Graph

18 Commits

Author SHA1 Message Date
Szabolcs Nagy 76d7cfb7e6 use the generic ioctl.h for x86_64, x32 and aarch64
they were slightly different in musl, but should be the same:
the linux uapi and glibc headers are not different.
2016-07-03 12:49:24 -04:00
Szabolcs Nagy 78b1f3cb14 add preadv2 and pwritev2 syscall numbers for linux v4.6
the syscalls take an additional flag argument, they were added in commit
f17d8b35452cab31a70d224964cd583fb2845449 and a RWF_HIPRI priority hint
flag was added to linux/fs.h in 97be7ebe53915af504fb491fb99f064c7cf3cb09.

the syscall is not allocated for microblaze and sh yet.
2016-06-09 13:38:41 -04:00
Bobby Bingham 63e3a1661f deduplicate __NR_* and SYS_* syscall number definitions 2016-05-12 00:34:05 -05:00
Szabolcs Nagy 84d4f5eee5 add copy_file_range syscall numbers from linux v4.5
it was introduced for offloading copying between regular files
in linux commit 29732938a6289a15e907da234d6692a2ead71855

(microblaze and sh does not yet have the syscall number.)
2016-03-19 11:30:49 -04:00
Szabolcs Nagy e9f1c7981a deduplicate bits/mman.h
currently five targets use the same mman.h constants and the rest
share most constants too, so move them to sys/mman.h before the
bits/mman.h include where the differences can be corrected by
redefinition of the macros.

this fixes two minor bugs: POSIX_MADV_DONTNEED was wrong on most
targets (it should be the same as MADV_DONTNEED), and sh defined
the x86-only MAP_32BIT mmap flag.
2016-03-18 22:40:28 -04:00
Rich Felker 4dfac11538 deduplicate the bulk of the arch bits headers
all bits headers that were identical for a number of 'clean' archs are
moved to the new arch/generic tree. in addition, a few headers that
differed only cosmetically from the new generic version are removed.

additional deduplication may be possible in mman.h and in several
headers (limits.h, posix.h, stdint.h) that mostly depend on whether
the arch is 32- or 64-bit, but they are left alone for now because
greater gains are likely possible with more invasive changes to header
logic, which is beyond the scope of this commit.
2016-01-27 21:52:14 -05:00
Szabolcs Nagy 789ff6a9f8 add MCL_ONFAULT and MLOCK_ONFAULT mlockall and mlock2 flags
they lock faulted pages into memory (useful when a small part of a
large mapped file needs efficient access), new in linux v4.4, commit
b0f205c2a3082dd9081f9a94e50658c5fa906ff1

MLOCK_* is not in the POSIX reserved namespace for sys/mman.h
2016-01-26 18:31:05 -05:00
Szabolcs Nagy 51d5f139ca add mlock2 syscall number from linux v4.4
this is mlock with a flags argument, new in linux commit
a8ca5d0ecbdde5cc3d7accacbd69968b0c98764e

as usual microblaze and sh don't have allocated syscall number yet.
2016-01-26 18:30:50 -05:00
Szabolcs Nagy 09001a8f97 add new membarrier, userfaultfd and switch_endian syscalls
new in linux v4.3 added for aarch64, arm, i386, mips, or1k, powerpc,
x32 and x86_64.

membarrier is a system wide memory barrier, moves most of the
synchronization cost to one side, new in kernel commit
5b25b13ab08f616efd566347d809b4ece54570d1

userfaultfd is useful for qemu and is new in kernel commit
8d2afd96c20316d112e04d935d9e09150e988397

switch_endian is powerpc only for switching endianness, new in commit
529d235a0e190ded1d21ccc80a73e625ebcad09b
2016-01-26 18:28:20 -05:00
Felix Janda b291e7ca9b fix namespace violations in aarch64/bits/termios.h
in analogy with commit a627eb3586
2015-09-15 14:28:07 -04:00
Rich Felker abfe1f6541 aarch64: remove duplicate macro definitions in bits/fcntl.h 2015-04-01 19:25:32 -04:00
Rich Felker dfc1a37c44 aarch64: fix definition of sem_nsems in semid_ds structure
POSIX requires the sem_nsems member to have type unsigned short. we
have to work around the incorrect kernel type using matching
endian-specific padding.
2015-04-01 19:12:18 -04:00
Szabolcs Nagy b24d813d24 aarch64: fix namespace pollution in bits/shm.h
The shm_info struct is a gnu extension and some of its members do
not have shm* prefix. This is worked around in sys/shm.h by macros,
but aarch64 didn't use those.
2015-04-01 19:05:12 -04:00
Rich Felker e626deeec8 fix missing max_align_t definition on aarch64 2015-03-20 01:21:37 -04:00
Rich Felker d5a5045382 fix MINSIGSTKSZ values for archs with large signal contexts
the previous values (2k min and 8k default) were too small for some
archs. aarch64 reserves 4k in the signal context for future extensions
and requires about 4.5k total, and powerpc reportedly uses over 2k.
the new minimums are chosen to fit the saved context and also allow a
minimal signal handler to run.

since the default (SIGSTKSZ) has always been 6k larger than the
minimum, it is also increased to maintain the 6k usable by the signal
handler. this happens to be able to store one pathname buffer and
should be sufficient for calling any function in libc that doesn't
involve conversion between floating point and decimal representations.

x86 (both 32-bit and 64-bit variants) may also need a larger minimum
(around 2.5k) in the future to support avx-512, but the values on
these archs are left alone for now pending further analysis.

the value for PTHREAD_STACK_MIN is not increased to match MINSIGSTKSZ
at this time. this is so as not to preclude applications from using
extremely small thread stacks when they know they will not be handling
signals. unfortunately cancellation and multi-threaded set*id() use
signals as an implementation detail and therefore require a stack
large enough for a signal context, so applications which use extremely
small thread stacks may still need to avoid using these features.
2015-03-18 00:31:37 -04:00
Szabolcs Nagy 962cbfbf86 aarch64: fix typo in bits/ioctl.h 2015-03-14 15:49:08 -04:00
Szabolcs Nagy 38bf2d7cc3 aarch64: add struct _aarch64_ctx to signal.h
The unwind code in libgcc uses this type for unwinding across signal
handlers. On aarch64 the kernel may place a sequence of structs on the
signal stack on top of the ucontext to provide additional information.
The unwinder only needs the header, but added all the types the kernel
currently defines for this mechanism because they are part of the uapi.
2015-03-14 13:55:24 -04:00
Szabolcs Nagy 01ef3dd9c5 add aarch64 port
This adds complete aarch64 target support including bigendian subarch.

Some of the long double math functions are known to be broken otherwise
interfaces should be fully functional, but at this point consider this
port experimental.

Initial work on this port was done by Sireesh Tripurari and Kevin Bortis.
2015-03-11 20:12:35 -04:00