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2019-03-13powerpc: add PTRACE_SYSEMU from linux v4.20Szabolcs Nagy-0/+2
added in linux commit 5521eb4bca2db733952f068c37bdf3cd656ad23c
2019-02-07move arch-invariant definitions out of bits/ioctl.hBobby Bingham-97/+0
2018-12-09add io_pgetevents and rseq syscall numbers from linux v4.18Szabolcs Nagy-0/+2
io_pgetevents is new in linux commit 7a074e96dee62586c935c80cecd931431bfdd0be rseq is new in linux commit d7822b1e24f2df5df98c76f0e94a5416349ff759
2018-10-16make thread-pointer-loading asm non-volatileRich Felker-1/+1
this will allow the compiler to cache and reuse the result, meaning we no longer have to take care not to load it more than once for the sake of archs where the load may be expensive. depends on commit 1c84c99913bf1cd47b866ed31e665848a0da84a2 for correctness, since otherwise the compiler could hoist loads during stage 3 of dynamic linking before the initial thread-pointer setup.
2018-10-16remove ancient clang workaround from powerpc pthread_arch.h asmRich Felker-5/+0
versions of clang all the way back to 3.1 lack the bug this was purportedly working around.
2018-09-14fix broken atomic store on powerpc[64]Rich Felker-8/+0
in our memory model, all atomics are supposed to be full barriers; stores are not release-only. this is important because store is used as an unlock operation in places where it needs to acquire the waiter count to determine if a futex wake is needed. at least in the malloc-internal locks, but possibly elsewhere, soft deadlocks from missing futex wake (breakable by poking the threads to restart the syscall, e.g. by attaching a tracer) were reported to occur. once the malloc lock is replaced with Jens Gustedt's new lock implementation (see commit 47d0bcd4762f223364e5b58d5a381aaa0cbd7c38), malloc will not be affected by the issue, but it's not clear that other uses won't be. reducing the strength of the ordering properties required from a_store would require a thorough analysis of how it's used. to fix the problem, I'm removing the powerpc[64]-specific a_store definition; now, the top-level atomic.h will implement a_store using a_barrier on both sides of the store. it's not clear to me yet whether there might be issues with the other atomics. it's possible that a_post_llsc needs to be replaced with a full barrier to guarantee the formal semanics we want, but either way I think the difference is unlikely to impact the way we use them.
2018-07-17add support for arch-specific ptrace command macrosSzabolcs Nagy-0/+23
sys/ptrace.h is target specific, use bits/ptrace.h to add target specific macro definitions. these macros are kept in the generic sys/ptrace.h even though some targets don't support them: PTRACE_GETREGS PTRACE_SETREGS PTRACE_GETFPREGS PTRACE_SETFPREGS PTRACE_GETFPXREGS PTRACE_SETFPXREGS so no macro definition got removed in this patch on any target. only s390x has a numerically conflicting macro definition (PTRACE_SINGLEBLOCK). the PT_ aliases follow glibc headers, otherwise the definitions come from linux uapi headers except ones that are skipped in glibc and there is no real kernel support (s390x PTRACE_*_AREA) or need special type definitions (mips PTRACE_*_WATCH_*) or only relevant for linux 2.4 compatibility (PTRACE_OLDSETOPTIONS).
2018-06-26fix regression in powerpc[64] SO_PEERSEC definitionRich Felker-0/+1
commit 587f5a53bc3a68d80b239ba515d583df690a96df moved the definition of SO_PEERSEC to bits/socket.h for archs where the SO_* macros differ from their standard values, but failed to add copies of the generic definition for powerpc and powerpc64.
2018-06-19powerpc: add pkey syscall numbers from linux v4.16Szabolcs Nagy-0/+3
add pkey_mprotect, pkey_alloc, pkey_free syscall numbers, new in linux commits 3350eb2ea127978319ced883523d828046af4045 and 9499ec1b5e82321829e1c1510bcc37edc20b6f38
2018-06-02fix TLS layout of TLS variant I when there is a gap above TPSzabolcs Nagy-0/+1
In TLS variant I the TLS is above TP (or above a fixed offset from TP) but on some targets there is a reserved gap above TP before TLS starts. This matters for the local-exec tls access model when the offsets of TLS variables from the TP are hard coded by the linker into the executable, so the libc must compute these offsets the same way as the linker. The tls offset of the main module has to be alignup(GAP_ABOVE_TP, main_tls_align). If there is no TLS in the main module then the gap can be ignored since musl does not use it and the tls access models of shared libraries are not affected. The previous setup only worked if (tls_align & -GAP_ABOVE_TP) == 0 (i.e. TLS did not require large alignment) because the gap was treated as a fixed offset from TP. Now the TP points at the end of the pthread struct (which is aligned) and there is a gap above it (which may also need alignment). The fix required changing TP_ADJ and __pthread_self on affected targets (aarch64, arm and sh) and in the tlsdesc asm the offset to access the dtv changed too.
2018-03-10fix minor namespace issues in termios.hRich Felker-0/+2
the output delay features (NL*, CR*, TAB*, BS*, and VT*) are XSI-shaded. VT* is in the V* namespace reservation but the rest need to be suppressed in base POSIX namespace. unfortunately this change introduces feature test macro checks into another bits header. at some point these checks should be simplified by having features.h handle the "FTM X implies Y" relationships.
2018-02-22powerpc: update hwcap.h for linux v4.15Szabolcs Nagy-0/+3
PPC_FEATURE2_HTM_NO_SUSPEND is new in linux commit cba6ac4869e45cc93ac5497024d1d49576e82666 PPC_FEATURE2_DARN and PPC_FEATURE2_SCV were new in v4.12 in commit a4700a26107241cc7b9ac8528b2c6714ff99983d
2018-02-22add MAP_SYNC and MAP_SHARED_VALIDATE from linux v4.15Szabolcs Nagy-0/+1
for synchronous page faults, new in linux commit 1c9725974074a047f6080eecc62c50a8e840d050 and b6fb293f2497a9841d94f6b57bd2bb2cd222da43 note that only targets that use asm-generic/mman.h have this new flag defined, so undef it on other targets (mips*, powerpc*).
2018-02-22mips,powerpc: fix TIOCSER_TEMT in termios.hSzabolcs Nagy-1/+1
use the same token to define TIOCSER_TEMT as is used in ioctl.h so when both headers are included there are no redefinition warnings during musl build.
2017-11-05ioctl TIOCGPTPEER from linux v4.13Szabolcs Nagy-0/+1
added for safe opening of peer end of pty in a mount namespace. new in linux commit c6325179238f1d4683edbec53d8322575d76d7e2
2017-11-05add statx syscall numbers from linux v4.11Szabolcs Nagy-0/+1
statx was added in linux commit a528d35e8bfcc521d7cb70aaf03e1bd296c8493f (there is no libc wrapper yet and microblaze and sh misses the number).
2017-11-05add kexec_file_load syscall number on powerpc from linux v4.10Szabolcs Nagy-0/+1
added in linux commit 80f60e509a03ff9ff2bdbf9cd1e935c6360b8bd9
2017-09-11powerpc{64}: fix MAP_NORESERVE and MAP_LOCKED in mman.hSzabolcs Nagy-1/+6
MAP_{NORESERVE,LOCKED} have different values on powerpc than in generic.
2017-09-06make syscall.h consistent with linuxSzabolcs Nagy-5/+0
most of the found naming differences don't matter to musl, because internally it unifies the syscall names that vary across targets, but for external code the names should match the kernel uapi. aarch64: __NR_fstatat is called __NR_newfstatat in linux. __NR_or1k_atomic got mistakenly copied from or1k. arm: __NR_arm_sync_file_range is an alias for __NR_sync_file_range2 __NR_fadvise64_64 is called __NR_arm_fadvise64_64 in linux, the old non-arm name is kept too, it should not cause issues. (powerpc has similar nonstandard fadvise and it uses the normal name.) i386: __NR_madvise1 was removed from linux in commit 303395ac3bf3e2cb488435537d416bc840438fcb 2011-11-11 microblaze: __NR_fadvise, __NR_fstatat, __NR_pread, __NR_pwrite had different name in linux. mips: __NR_fadvise, __NR_fstatat, __NR_pread, __NR_pwrite, __NR_select had different name in linux. mipsn32: __NR_fstatat is called __NR_newfstatat in linux. or1k: __NR__llseek is called __NR_llseek in linux. the old name is kept too because that's the name musl uses internally. powerpc: __NR_{get,set}res{gid,uid}32 was never present in powerpc linux. __NR_timerfd was briefly defined in linux but then got renamed.
2017-08-29add a_clz_64 helper functionSzabolcs Nagy-0/+7
counts leading zero bits of a 64bit int, undefined on zero input. (has nothing to do with atomics, added to atomic.h so target specific helper functions are together.) there is a logarithmic generic implementation and another in terms of a 32bit a_clz_32 on targets where that's available.
2017-08-29add SIOCGSTAMPNS socket ioctl macro to ioctl.hSzabolcs Nagy-0/+1
it is defined in linux asm/sockios.h since commit ae40eb1ef30ab4120bd3c8b7e3da99ee53d27a23 (linux v2.6.22) but was missing from musl by accident. in musl the sockios macros are exposed in sys/ioctl.h together with other ioctl requests instead of in sys/socket.h because of namespace rules. (glibc has them in sys/socket.h under _GNU_SOURCE.)
2016-10-20add bits/hwcap.h and include it in sys/auxv.hSzabolcs Nagy-0/+40
aarch64, arm, mips, mips64, mipsn32, powerpc, powerpc64 and sh have cpu feature bits defined in linux for AT_HWCAP auxv entry, so expose those in sys/auxv.h it seems the mips hwcaps were never exposed to userspace neither by linux nor by glibc, but that's most likely an oversight.
2016-07-03make brace placement in public header struct definitions consistentRich Felker-16/+8
placing the opening brace on the same line as the struct keyword/tag is the style I prefer and seems to be the prevailing practice in more recent additions. these changes were generated by the command: find include/ arch/*/bits -name '*.h' \ -exec sed -i '/^struct [^;{]*$/{N;s/\n/ /;}' {} + and subsequently checked by hand to ensure that the regex did not pick up any false positives.
2016-07-03fix CBAUDEX in powerpc termios.hSzabolcs Nagy-1/+1
it seems it was a typo.
2016-07-03fix powerpc termios.h macro exposure/namespace issuesSzabolcs Nagy-12/+12
same changes as in the generic header. and BOTHER and IBSHIFT were removed (present in linux uapi but not in glibc) and TIOCSER_TEMT was added (present in glibc).
2016-07-03remove mips and powerpc ioctls that are missing from linux uapiSzabolcs Nagy-8/+0
mips and powerpc use their own asm/ioctls.h, not the asm-generic/ioctls.h and they lack termiox macros that are available on other targets. see kernel commit 1d65b4a088de407e99714fdc27862449db04fb5c
2016-07-03add missing TIOC* macros to ioctl.hSzabolcs Nagy-0/+3
these are defined in linux asm/ioctls.h. (powerpc64 and powerpc bits/ioctl.h are now identical)
2016-07-03add missing SIOCSIFNAME from linux/sockios.h to ioctl.hSzabolcs Nagy-0/+1
glibc ioctl.h has it too.
2016-07-03remove ioctl macros that were removed from linux uapiSzabolcs Nagy-7/+0
TIOCTTYGSTRUCT, TIOCGHAYESESP, TIOCSHAYESESP and TIOCM_MODEM_BITS were removed from the linux uapi and not present in glibc ioctl.h
2016-07-01fix posix_fadvise syscall args on powerpc, unify with arm fixRich Felker-0/+2
commit 6d38c9cf80f47623e5e48190046673bbd0dc410b provided an arm-specific version of posix_fadvise to address the alternate argument order the kernel expects on arm, but neglected to address that powerpc (32-bit) has the same issue. instead of having arch variant files in duplicate, simply put the alternate version in the top-level file under the control of a macro defined in syscall_arch.h.
2016-06-09add preadv2 and pwritev2 syscall numbers for linux v4.6Szabolcs Nagy-0/+2
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.
2016-05-12deduplicate __NR_* and SYS_* syscall number definitionsBobby Bingham-374/+0
2016-05-08fix spurious trailing whitespace in powerpc & powerpc64 bits/errno.hRich Felker-1/+1
2016-03-19add copy_file_range syscall numbers from linux v4.5Szabolcs Nagy-0/+2
it was introduced for offloading copying between regular files in linux commit 29732938a6289a15e907da234d6692a2ead71855 (microblaze and sh does not yet have the syscall number.)
2016-03-18deduplicate bits/mman.hSzabolcs Nagy-55/+3
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.
2016-03-06add powerpc soft-float supportFelix Fietkau-1/+12
Some PowerPC CPUs (e.g. Freescale MPC85xx) have a completely different instruction set for floating point operations (SPE). Executing regular PowerPC floating point instructions results in "Illegal instruction" errors. Make it possible to run these devices in soft-float mode.
2016-01-27deduplicate the bulk of the arch bits headersRich Felker-11/+0
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.
2016-01-26add MCL_ONFAULT and MLOCK_ONFAULT mlockall and mlock2 flagsSzabolcs Nagy-0/+1
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
2016-01-26add mlock2 syscall number from linux v4.4Szabolcs Nagy-0/+2
this is mlock with a flags argument, new in linux commit a8ca5d0ecbdde5cc3d7accacbd69968b0c98764e as usual microblaze and sh don't have allocated syscall number yet.
2016-01-26add new membarrier, userfaultfd and switch_endian syscallsSzabolcs Nagy-0/+6
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
2016-01-24clean powerpc syscall.hSzabolcs Nagy-24/+0
remove ifdefs for powerpc64.
2016-01-24add missing powerpc specific PROT_SAO memory protection flagSzabolcs Nagy-0/+1
this flag for strong access ordering was added in linux v2.6.27 commit aba46c5027cb59d98052231b36efcbbde9c77a1d
2016-01-24fix powerpc MCL_* mlockall flags in bits/mman.hSzabolcs Nagy-2/+2
the definitions didn't match the linux uapi headers.
2016-01-22overhaul powerpc atomics for new atomics frameworkRich Felker-14/+38
previously powerpc had a_cas defined in terms of its native ll/sc style operations, but all other atomics were defined in terms of a_cas. instead define a_ll and a_sc so the compiler can generate optimized versions of all the atomic ops and perform better inlining of a_cas. extracting the result of the sc (stwcx.) instruction is rather awkward because it's natively stored in a condition flag, which is not representable in inline asm. but even with this limitation the new code still seems significantly better.
2016-01-21refactor internal atomic.hRich Felker-126/+15
rather than having each arch provide its own atomic.h, there is a new shared atomic.h in src/internal which pulls arch-specific definitions from arc/$(ARCH)/atomic_arch.h. the latter can be extremely minimal, defining only a_cas or new ll/sc type primitives which the shared atomic.h will use to construct everything else. this commit avoids making heavy changes to the individual archs' atomic implementations. definitions which are identical or near-identical to what the new shared atomic.h would produce have been removed, but otherwise the changes made are just hooking up the arch-specific files to the new infrastructure. major changes to take advantage of the new system will come in subsequent commits.
2015-11-02properly access mcontext_t program counter in cancellation handlerRich Felker-2/+1
using the actual mcontext_t definition rather than an overlaid pointer array both improves correctness/readability and eliminates some ugly hacks for archs with 64-bit registers bit 32-bit program counter. also fix UB due to comparison of pointers not in a common array object.
2015-10-15prevent reordering of or1k and powerpc thread pointer loadsRich Felker-0/+1
other archs use asm for the thread pointer load, so making that asm volatile is sufficient to inform the compiler that it has a "side effect" (crashing or giving the wrong result if the thread pointer was not yet initialized) that prevents reordering. however, powerpc and or1k have dedicated general purpose registers for the thread pointer and did not need to use any asm to access it; instead, "local register variables with a specified register" were used. however, there is no specification for ordering constraints on this type of usage, and presumably use of the thread pointer could be reordered across its initialization. to impose an ordering, I have added empty volatile asm blocks that produce the "local register variable with a specified register" as an output constraint.
2015-09-17new dlstart stage-2 chaining for powerpcRich Felker-0/+9
2015-09-15reindent powerpc's bits/termios.h to be consistent with other archsFelix Janda-140/+138
2015-07-21socket.h: cleanup/reorder mips and powerpc bits/socket.hRoman Yeryomin-2/+2
....to be somewhat consistent and easily comparable with asm/socket.h Signed-off-by: Roman Yeryomin <roman@ubnt.com>