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* aarch64: add HWCAP_ flags from linux v4.17Szabolcs Nagy2018-06-191-0/+4
| | | | | hwcaps for armv8.4, new in linux commit 7206dc93a58fb76421c4411eefa3c003337bcb2d
* aarch64: add HWCAP_ASIMDFHM from linux v4.16Szabolcs Nagy2018-06-191-0/+1
| | | | | armv8.4 fp mul instructions. added in commit 3b3b681097fae73b7f5dcdd42db6cfdf32943d4c
* fix TLS layout of TLS variant I when there is a gap above TPSzabolcs Nagy2018-06-022-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | 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.
* aarch64: add sve_context struct and related defines from linux v4.15Szabolcs Nagy2018-02-221-0/+39
| | | | | signal context definitions for scalable vector extension new in commit d0b8cd3187889476144bd9b13bf36a932c3e7952
* aarch64: update hwcap.h for linux v4.15Szabolcs Nagy2018-02-221-0/+6
| | | | | | HWCAP_SVE is new in linux commit 43994d824e8443263dc98b151e6326bf677be52e HWCAP_SHA3, HWCAP_SM3, HWCAP_SM4, HWCAP_ASIMDDP and HWCAP_SHA512 are new in f5e035f8694c3bdddc66ea46ecda965ee6853718
* aarch64: add HWCAP_DCPOP from linux v4.14Szabolcs Nagy2018-02-221-0/+1
| | | | | indicates ARMv8.2-DCPoP persistent memory support extension. new in linux commit 7aac405ebb3224037efd56b73d82d181111cdac3
* aarch64: fix mismatched type of ucontext_t uc_link memberWilliam Pitcock2018-01-311-1/+1
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* aarch64: add extra_context struct from linux v4.13Szabolcs Nagy2017-11-051-0/+7
| | | | | allows expanding the signal frame beyond the 4k reserved space. new in linux commit 33f082614c3443d937f50fe936f284f62bbb4a1b
* aarch64: add new HWCAP_* flags from linux v4.12Szabolcs Nagy2017-11-051-0/+3
| | | | | | | hwcap bits for armv8.3 extensions, added in linux commits c8c3798d2369e4285da44b244638eafe446a8f8a cb567e79fa504575cb97fb2f866d2040ed1c92e7 c651aae5a7732287c1c9bc974ece4ed798780544
* add statx syscall numbers from linux v4.11Szabolcs Nagy2017-11-051-0/+1
| | | | | statx was added in linux commit a528d35e8bfcc521d7cb70aaf03e1bd296c8493f (there is no libc wrapper yet and microblaze and sh misses the number).
* update aarch64 hwcap.h for linux v4.11Szabolcs Nagy2017-11-051-0/+2
| | | | | | new hwcap bits were added in kernel commits 77c97b4ee21290f5f083173d957843b615abbff2 f92f5ce01ee6a6a86cbfc4e3b0d18529c302b1ea
* make syscall.h consistent with linuxSzabolcs Nagy2017-09-061-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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.
* add a_clz_64 helper functionSzabolcs Nagy2017-08-291-0/+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.
* add pkey_{mprotect,alloc,free} syscalls from linux v4.9Szabolcs Nagy2016-12-291-0/+3
| | | | | see linux commit e8c24d3a23a469f1f40d4de24d872ca7023ced0a and linux Documentation/x86/protection-keys.txt
* add bits/hwcap.h and include it in sys/auxv.hSzabolcs Nagy2016-10-201-0/+11
| | | | | | | | | 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.
* make brace placement in public header typedef'd structs consistentRich Felker2016-07-031-2/+1
| | | | | | commit befa5866ee30d09c0c96e88af2eabff5911342ea performed this change for struct definitions that did not also involve typedef, but omitted the latter.
* make brace placement in public header struct definitions consistentRich Felker2016-07-034-10/+5
| | | | | | | | | | | | | | 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.
* use the generic ioctl.h for x86_64, x32 and aarch64Szabolcs Nagy2016-07-031-213/+0
| | | | | they were slightly different in musl, but should be the same: the linux uapi and glibc headers are not different.
* add preadv2 and pwritev2 syscall numbers for linux v4.6Szabolcs Nagy2016-06-091-0/+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.
* deduplicate __NR_* and SYS_* syscall number definitionsBobby Bingham2016-05-122-543/+272
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* add copy_file_range syscall numbers from linux v4.5Szabolcs Nagy2016-03-191-0/+2
| | | | | | | it was introduced for offloading copying between regular files in linux commit 29732938a6289a15e907da234d6692a2ead71855 (microblaze and sh does not yet have the syscall number.)
* deduplicate bits/mman.hSzabolcs Nagy2016-03-181-58/+0
| | | | | | | | | | | 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.
* make aarch64 atomic_arch.h report that it defines pointer-sized ll/scRich Felker2016-02-231-0/+2
| | | | | | | | at present this is done only for consistency, since this file defines its own a_cas_p rather than using the new generic one from atomic.h added in commit 225f6a6b5b7173b6655e4f5d49b5b9fea70bf3bb. these definitions may however be useful if we ever need to add other pointer-sized atomic operations.
* better a_sc inline asm constraint on aarch64 and armSzabolcs Nagy2016-01-311-2/+2
| | | | | | | | | | "Q" input constraint was used for the written object, instead of "=Q" output constraint. this should not cause problems because "memory" is on the clobber list, but "=Q" better documents the intent and more consistent with the actual asm code. this changes the generated code, because different registers are used, but other than the register names nothing should change.
* deduplicate the bulk of the arch bits headersRich Felker2016-01-277-305/+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.
* add MCL_ONFAULT and MLOCK_ONFAULT mlockall and mlock2 flagsSzabolcs Nagy2016-01-261-0/+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
* add mlock2 syscall number from linux v4.4Szabolcs Nagy2016-01-261-0/+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.
* add new membarrier, userfaultfd and switch_endian syscallsSzabolcs Nagy2016-01-261-0/+4
| | | | | | | | | | | | | | | 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
* fix aarch64 atomics to load/store 32bit onlySzabolcs Nagy2016-01-241-2/+2
| | | | | | a_ll/a_sc inline asm used 64bit register operands (%0) instead of 32bit ones (%w0), this at least broke a_and_64 (which always cleared the top 32bit, leaking memory in malloc).
* improve aarch64 atomicsRich Felker2016-01-231-16/+36
| | | | | | | | | | | | | | | | | aarch64 provides ll/sc variants with acquire/release memory order, freeing us from the need to have full barriers both before and after the ll/sc operation. previously they were not used because the a_cas can fail without performing a_sc, in which case half of the barrier would be omitted. instead, define a custom version of a_cas for aarch64 which uses a_barrier explicitly when aborting the cas operation. aside from cas, other operations built on top of ll/sc are not affected since they never abort but rather loop until they succeed. a split ll/sc version of the pointer-sized a_cas_p is also introduced using the same technique. patch by Szabolcs Nagy.
* overhaul aarch64 atomics for new atomics frameworkRich Felker2016-01-211-174/+25
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* refactor internal atomic.hRich Felker2016-01-211-18/+14
| | | | | | | | | | | | | | | 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.
* properly access mcontext_t program counter in cancellation handlerRich Felker2015-11-021-1/+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.
* fix namespace violations in aarch64/bits/termios.hFelix Janda2015-09-151-7/+7
| | | | in analogy with commit a627eb35864d5c29a3c3300dfe83745ab1e7a00f
* aarch64: fix 64-bit syscall argument passingSzabolcs Nagy2015-08-111-4/+2
| | | | | | | | | On 32bit systems long long arguments are passed in a special way to some syscalls; this accidentally got copied to the AArch64 port. The following interfaces were broken: fallocate, fanotify, ftruncate, posix_fadvise, posix_fallocate, pread, pwrite, readahead, sync_file_range, truncate.
* add .text section directive to all crt_arch.h files missing itRich Felker2015-05-221-0/+1
| | | | | | | | i386 and x86_64 versions already had the .text directive; other archs did not. normally, top-level (file scope) __asm__ starts in the .text section anyway, but problems were reported with some versions of clang, and it seems preferable to set it explicitly anyway, at least for the sake of consistency between archs.
* fix __syscall declaration with wrong visibility in syscall_arch.hSzabolcs Nagy2015-04-301-2/+0
| | | | | remove __syscall declaration where it is not needed (aarch64, arm, microblaze, or1k) and add the hidden attribute where it is (mips).
* aarch64: fix CRTJMP in reloc.hSzabolcs Nagy2015-04-301-1/+1
| | | | | commit f3ddd173806fd5c60b3f034528ca24542aecc5b9 broke the build by using "bx" instead of "br".
* dynamic linker bootstrap overhaulRich Felker2015-04-132-30/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | this overhaul further reduces the amount of arch-specific code needed by the dynamic linker and removes a number of assumptions, including: - that symbolic function references inside libc are bound at link time via the linker option -Bsymbolic-functions. - that libc functions used by the dynamic linker do not require access to data symbols. - that static/internal function calls and data accesses can be made without performing any relocations, or that arch-specific startup code handled any such relocations needed. removing these assumptions paves the way for allowing libc.so itself to be built with stack protector (among other things), and is achieved by a three-stage bootstrap process: 1. relative relocations are processed with a flat function. 2. symbolic relocations are processed with no external calls/data. 3. main program and dependency libs are processed with a fully-functional libc/ldso. reduction in arch-specific code is achived through the following: - crt_arch.h, used for generating crt1.o, now provides the entry point for the dynamic linker too. - asm is no longer responsible for skipping the beginning of argv[] when ldso is invoked as a command. - the functionality previously provided by __reloc_self for heavily GOT-dependent RISC archs is now the arch-agnostic stage-1. - arch-specific relocation type codes are mapped directly as macros rather than via an inline translation function/switch statement.
* aarch64: remove duplicate macro definitions in bits/fcntl.hRich Felker2015-04-011-3/+0
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* aarch64: fix definition of sem_nsems in semid_ds structureRich Felker2015-04-011-1/+7
| | | | | | 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.
* aarch64: fix namespace pollution in bits/shm.hSzabolcs Nagy2015-04-011-2/+2
| | | | | | 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.
* fix missing max_align_t definition on aarch64Rich Felker2015-03-201-0/+2
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* fix MINSIGSTKSZ values for archs with large signal contextsRich Felker2015-03-181-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | 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.
* aarch64: fix typo in bits/ioctl.hSzabolcs Nagy2015-03-141-1/+1
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* aarch64: add struct _aarch64_ctx to signal.hSzabolcs Nagy2015-03-141-0/+17
| | | | | | | | 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.
* add aarch64 portSzabolcs Nagy2015-03-1133-0/+1814
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.
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