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* add clone3 syscall number from linux v5.3Szabolcs Nagy2019-12-301-0/+2
| | | | | | | | | | | | | | the syscall number is reserved on all targets, but it is not wired up on all targets, see linux commit 8f6ccf6159aed1f04c6d179f61f6fb2691261e84 Merge tag 'clone3-v5.3' of ... brauner/linux linux commit 8f3220a806545442f6f26195bc491520f5276e7c arch: wire-up clone3() syscall linux commit 7f192e3cd316ba58c88dfa26796cf77789dd9872 fork: add clone3
* add pidfd_open syscall number from linux v5.3Szabolcs Nagy2019-12-301-0/+1
| | | | | | | | | | see linux commit 7615d9e1780e26e0178c93c55b73309a5dc093d7 arch: wire-up pidfd_open() linux commit 32fcb426ec001cb6d5a4a195091a8486ea77e2df pid: add pidfd_open()
* move time_t and suseconds_t definitions to common alltypes.h.inRich Felker2019-11-021-3/+0
| | | | | | | now that all 32-bit archs have 64-bit time_t (and suseconds_t), the arch-provided _Int64 macro (long or long long, as appropriate) can be used to define them, and arch-specific definitions are no longer needed.
* add x32 bits/ioctl_fix.h defining time-related sockios macrosRich Felker2019-11-021-0/+4
| | | | | | these definitions are copied from generic bits/ioctl.h, so that x32 keeps the "_OLD" versions (which are already time64 on x32) when 32-bit archs switch to 64-bit time_t.
* add back x32 bits/socket.h defining time-related socket optionsRich Felker2019-11-021-0/+5
| | | | | | | | these definitions are merely copied from the top-level sys/socket.h, so there is no functional change at this time. however, the top-level definitions will change to use the time64 "_NEW" versions on 32-bit archs when time_t is switched over to 64-bit. this commit ensures that change will be suppressed on x32.
* fix x32 msghdr struct by removing x32 bits/socket.hRich Felker2019-11-021-16/+0
| | | | | | | | | | | | being that it contains pointers and (from the kernel perspective, which is wrong) size_t members, x32 uses the 32-bit version of the structure, not a half-32-bit, half-64-bit layout like we had here. the x86_64 definition was inadvertently copied when x32 was first added. unlike errors in the opposite direction (missing padding), this error was not easily detected breakage, because the layout of the commonly used initial subset of members still matched. breakage could only be observed in the presence of control messages or flags.
* internally, define time64 rusage syscalls on x32 as the existing onesRich Felker2019-10-191-0/+2
| | | | | | | | | | | | | | | this is analogous to commit 40aa18d55ab763e69ad16d0cf1cebea708ffde47. so far, there are not any actual time64 versions of the rusage syscalls (getrusage and wait4) and might never be. however, the existing x32 ones behave the way time64 versions would if they existed: using 64-bit slots in place of all longs. presently, wait4 and getrusage are broken on x32, storing the timevals correctly but messing up everything else due to the long/kernel-long mismatch. this would be a huge buffer overflow if not for the 16 reserved slots we left long ago, which suffice to prevent 14 double-sized longs from overflowing into unrelated memory. this commit will make it possible to fix them.
* move pthread types out of per-arch alltypes.hRich Felker2019-10-171-8/+0
| | | | | | | | | | | policy has long been that these definitions are purely a function of whether long/pointer is 32- or 64-bit, and that they are not allowed to vary per-arch. move the definition to the shared alltypes.h.in fragment, using integer constant expressions in terms of sizeof to vary the array dimensions appropriately. I'm not sure whether this is more or less ugly than using preprocessor conditionals and two sets of definitions here, but either way is a lot less ugly than repeating the same thing for every arch.
* define LONG_MAX via arch alltypes.h, strip down bits/limits.hRich Felker2019-10-172-7/+1
| | | | | | | | | | | | | | | | | | | | | LLONG_MAX is uniform for all archs we support and plenty of header and code level logic assumes it is, so it does not make sense for limits.h bits mechanism to pretend it's variable. LONG_BIT can be defined in terms of LONG_MAX; there's no reason to put it in bits. by moving LONG_MAX definition to __LONG_MAX in alltypes.h and moving LLONG_MAX out of bits, there are now no plain-C limits that are defined in the bits header, so the bits header only needs to be included in the POSIX or extended profiles. this allows the feature test macro logic to be removed from the bits header, facilitating a long-term goal of getting such logic out of bits. having __LONG_MAX in alltypes.h will allow further generalization of headers. archs without a constant PAGESIZE no longer need bits/limits.h at all.
* move __BYTE_ORDER definition to alltypes.hRich Felker2019-10-172-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | this change is motivated by the intersection of several factors. presently, despite being a nonstandard header, endian.h is exposing the unprefixed byte order macros and functions only if _BSD_SOURCE or _GNU_SOURCE is defined. this is to accommodate use of endian.h from other headers, including bits headers, which need to define structure layout in terms of endianness. with time64 switch-over, even more headers will need to do this. at the same time, the resolution of Austin Group issue 162 makes endian.h a standard header for POSIX-future, requiring that it expose the unprefixed macros and the functions even in standards-conforming profiles. changes to meet this new requirement would break existing internal usage of endian.h by causing it to violate namespace where it's used. instead, have the arch's alltypes.h define __BYTE_ORDER, either as a fixed constant or depending on the right arch-specific predefined macros for determining endianness. explicit literals 1234 and 4321 are used instead of __LITTLE_ENDIAN and __BIG_ENDIAN so that there's no danger of getting the wrong result if a macro is undefined and implicitly evaluates to 0 at the preprocessor level. the powerpc (32-bit) bits/endian.h being removed had logic for varying endianness, but our powerpc arch has never supported that and has always been big-endian-only. this logic is not carried over to the new __BYTE_ORDER definition in alltypes.h.
* remove per-arch definitions for va_listRich Felker2019-10-171-3/+0
| | | | | | | now that commit f7f1079796abc6f97c69521d2334e9c7d3945dd8 removed the legacy i386 conditional definition, va_list is in no way arch-specific, and has no reason to be in the future. move it to the shared part of alltypes.h.in
* add new syscall numbers from linux v5.2Szabolcs Nagy2019-09-111-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | new mount api syscalls were added, same numers on all targets, see linux commit a07b20004793d8926f78d63eb5980559f7813404 vfs: syscall: Add open_tree(2) to reference or clone a mount linux commit 2db154b3ea8e14b04fee23e3fdfd5e9d17fbc6ae vfs: syscall: Add move_mount(2) to move mounts around linux commit 24dcb3d90a1f67fe08c68a004af37df059d74005 vfs: syscall: Add fsopen() to prepare for superblock creation linux commit ecdab150fddb42fe6a739335257949220033b782 vfs: syscall: Add fsconfig() for configuring and managing a context linux commit 93766fbd2696c2c4453dd8e1070977e9cd4e6b6d vfs: syscall: Add fsmount() to create a mount for a superblock linux commit cf3cba4a429be43e5527a3f78859b1bfd9ebc5fb vfs: syscall: Add fspick() to select a superblock for reconfiguration linux commit 9c8ad7a2ff0bfe58f019ec0abc1fb965114dde7d uapi, x86: Fix the syscall numbering of the mount API syscalls [ver #2] linux commit d8076bdb56af5e5918376cd1573a6b0007fc1a89 uapi: Wire up the mount API syscalls on non-x86 arches [ver #2]
* honor __WCHAR_TYPE__ on archs with legacy long definition of wchar_tRich Felker2019-09-081-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | historically, a number of 32-bit archs used long rather than int for wchar_t, for no good reason. GCC still uses the historical types, but clang replaced them all with int, and it seems PCC uses int too. mismatching the compiler's type for wchar_t is not an option due to wide string literals. note that the mismatch does not affect C++ ABI since wchar_t is its own builtin type/keyword in C++, distinct from both int and long, not a typedef. i386 already worked around this by honoring __WCHAR_TYPE__ if defined by the compiler, and only using the official legacy ABI type if not. add the same to the other affected archs. it might make sense at some point to switch to using int as the default if __WCHAR_TYPE__ is not defined, if the expectations is that new compilers will treat int as the correct choice, but it's unlikely that the case where __WCHAR_TYPE__ is undefined will ever be used anyway. I actually wanted to move the definition of wchar_t to the top-level shared alltypes.h.in, using __WCHAR_TYPE__ and falling back to int if not defined, but that can't be done without assuming all compilers define __WCHAR_TYPE__ thanks to some pathological archs where the ABI has wchar_t as an unsigned type.
* move IPC_64 from public bits/ipc.h to syscall_arch.hRich Felker2019-07-302-2/+2
| | | | | | | | | | | | | | | | | | | | the definition of the IPC_64 macro controls the interface between libc and the kernel through syscalls; it's not a public API. the meaning is rather obscure. long ago, Linux's sysvipc *id_ds structures used 16-bit uids/gids and wrong types for a few other fields. this was in the libc5 era, before glibc. the IPC_64 flag (64 is a misnomer; it's more like 32) tells the kernel to use the modern[-ish] versions of the structures. the definition of IPC_64 has nothing to do with whether the arch is 32- or 64-bit. rather, due to either historical accident or intentional obnoxiousness, the kernel only accepts and masks off the 0x100 IPC_64 flag conditional on CONFIG_ARCH_WANT_IPC_PARSE_VERSION, i.e. for archs that want to provide, or that accidentally provided, both. for archs which don't define this option, no masking is performed and commands with the 0x100 bit set will fail as invalid. so ultimately, the definition is just a matter of matching an arbitrary switch defined per-arch in the kernel.
* extricate bits/sem.h from x32 time_t hackRich Felker2019-07-291-0/+11
| | | | | | | | | | | | | | various padding fields in the generic bits/sem.h were defined in terms of time_t as a cheap hack standing in for "kernel long", to allow x32 to use the generic version of the file. this was a really bad idea, as it ended up getting copied into lots of arch-specific versions of the bits file, and is a blocker to changing time_t to 64-bit on 32-bit archs. this commit adds an x32-specific version of the header, and changes padding type back from time_t to long (currently the same type on all archs but x32) in the generic header and all the others the hack got copied into.
* remove x32 syscall timespec fixup hacksRich Felker2019-07-291-58/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | the x32 syscall interfaces treat timespec's tv_nsec member as 64-bit despite the API type being long and long being 32-bit in the ABI. this is no problem for syscalls that store timespecs to userspace as results, but caused uninitialized padding to be misinterpreted as the high bits in syscalls that take timespecs as input. since the beginning of the port, we've dealt with this situation with hacks in syscall_arch.h, and injected between __syscall_cp_c and __syscall_cp_asm, to special-case the syscall numbers that involve timespecs as inputs and copy them to a form suitable to pass to the kernel. commit 40aa18d55ab763e69ad16d0cf1cebea708ffde47 set the stage for removal of these hacks by letting us treat the "normal" x32 syscalls dealing with timespec as if they're x32's "time64" syscalls, effectively making x32 ax "time64-only 32-bit arch" like riscv32 will be when it's added. since then, all users of syscalls that x32's syscall_arch.h had hacks for have been updated to use time64 syscalls, so the hacks can be removed. there are still at least a few other timespec-related syscalls broken on x32, which were overlooked when the x32 hacks were done or added later. these include at least recvmmsg, adjtimex/clock_adjtime, and timerfd_settime, and they will be fixed independently later on.
* internally, define time64 syscalls on x32 as the existing syscallsRich Felker2019-07-271-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | x32 is odd in that it's the only ILP32 arch/ABI we have where time_t is 64-bit rather than (32-bit) long, and this has always been problematic in that it results in struct timespec having unused padding space, since tv_nsec has type long, which the kernel insists be zero- or sign-extended (due to negative tv_nsec being invalid, it doesn't matter which) to match the x86_64 type. up til now, we've had really ugly hacks in x32/syscall_arch.h to patch up the timespecs passed to the kernel. but the same requirement to zero- or sign-extend tv_nsec also applies to all the new time64 syscalls on true 32-bit archs. so let's take advantage of this to clean things up. this patch defines all of the time64 syscalls for x32 as aliases for the existing syscalls by the same name. this establishes the following invariants: - if the time64 form is defined, it takes time arguments as 64-bit objects, and tv_nsec inputs must be zero-/sign-extended to 64-bit. - if the time64 form is not defined, or if the time64 form is defined and is not equal to the "plain" form, the plain form takes time arguments as longs. this will avoid the need for protocols for archs to define appropriate types for each family of syscalls, and for the reader of the code to have to be aware of such type definitions. in some sense it might be simpler if the plain syscall form were undefined for x32, so that it would always take longs if defined. however, a number of these syscalls are used in contexts with a null time argument, or (e.g. futex) for commands that don't involve time at all, and having to introduce time64-specific logic to all those call points does not make sense. thus, while the "plain" forms are kept now just because they're needed until the affected code is converted over, they'll also almost surely be kept in the future as well.
* don't use futimesat syscall as utimensat fallback on x32Rich Felker2019-07-271-0/+2
| | | | | | | | | | kernel support for x32 was added long after the utimensat syscall was already available, so having a fallback is just wasted code size. also, for changes related to time64 support on 32-bit archs, I want to be able to assume the old futimesat syscall always works with longs, which is true except for x32. by ensuring that it's not used on x32, the needed invariant is established.
* decouple struct stat from kernel typeRich Felker2019-07-181-0/+22
| | | | | | | | | | | | | | | presently, all archs/ABIs have struct stat matching the kernel stat[64] type, except mips/mipsn32/mips64 which do conversion hacks in syscall_arch.h to work around bugs in the kernel type. this patch completely decouples them and adds a translation step to the success path of fstatat. at present, this is just a gratuitous copying, but it opens up multiple possibilities for future support for 64-bit time_t on 32-bit archs and for cleaned-up/unified ABIs. for clarity, the mips hacks are not yet removed in this commit, so the mips kstat structs still correspond to the output of the hacks in their syscall_arch.h files, not the raw kernel type. a subsequent commit will fix this.
* add new syscall numbers from linux v5.1Szabolcs Nagy2019-07-011-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | syscall numbers are now synced up across targets (starting from 403 the numbers are the same on all targets other than an arch specific offset) IPC syscalls sem*, shm*, msg* got added where they were missing (except for semop: only semtimedop got added), the new semctl, shmctl, msgctl imply IPC_64, see linux commit 0d6040d4681735dfc47565de288525de405a5c99 arch: add split IPC system calls where needed new 64bit time_t syscall variants got added on 32bit targets, see linux commit 48166e6ea47d23984f0b481ca199250e1ce0730a y2038: add 64-bit time_t syscalls to all 32-bit architectures new async io syscalls got added, see linux commit 2b188cc1bb857a9d4701ae59aa7768b5124e262e Add io_uring IO interface linux commit edafccee56ff31678a091ddb7219aba9b28bc3cb io_uring: add support for pre-mapped user IO buffers a new syscall got added that uses the fd of /proc/<pid> as a stable handle for processes: allows sending signals without pid reuse issues, intended to eventually replace rt_sigqueueinfo, kill, tgkill and rt_tgsigqueueinfo, see linux commit 3eb39f47934f9d5a3027fe00d906a45fe3a15fad signal: add pidfd_send_signal() syscall on some targets (arm, m68k, s390x, sh) some previously missing syscall numbers got added as well.
* add io_pgetevents and rseq syscall numbers from linux v4.18Szabolcs Nagy2018-12-091-0/+2
| | | | | | | | io_pgetevents is new in linux commit 7a074e96dee62586c935c80cecd931431bfdd0be rseq is new in linux commit d7822b1e24f2df5df98c76f0e94a5416349ff759
* make thread-pointer-loading asm non-volatileRich Felker2018-10-161-1/+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.
* apply hidden visibility to sigreturn code fragmentsRich Felker2018-09-121-1/+3
| | | | | | | these were overlooked in the declarations overhaul work because they are not properly declared, and the current framework even allows their declared types to vary by arch. at some point this should be cleaned up, but I'm not sure what the right way would be.
* add support for arch-specific ptrace command macrosSzabolcs Nagy2018-07-171-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | 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).
* remove a_ctz_l from arch specific atomic_arch.hAndre McCurdy2018-04-191-2/+2
| | | | | | | | Update atomic.h to provide a_ctz_l in all cases (atomic_arch.h should now only provide a_ctz_32 and/or a_ctz_64). The generic version of a_ctz_32 now takes advantage of a_clz_32 if available and the generic a_ctz_64 now makes use of a_ctz_32.
* use PAGESIZE rather than PAGE_SIZE in user.h bitsRich Felker2018-03-101-2/+2
| | | | align with commit c9c2cd3e6955cb1d57b8be01d4b072bf44058762.
* reverse definition dependency between PAGESIZE and PAGE_SIZERich Felker2018-03-101-1/+1
| | | | | | PAGESIZE is actually the version defined in POSIX base, with PAGE_SIZE being in the XSI option. use PAGESIZE as the underlying definition to facilitate making exposure of PAGE_SIZE conditional.
* fix x32 unistd macros to report as ILP32 not LP64Nicholas Wilson2017-12-141-2/+2
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* 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).
* 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.
* fix crashes in x32 __tls_get_addrrofl0r2017-01-131-0/+2
| | | | | | x32 has another gratuitous difference to all other archs: it passes an array of 64bit values to __tls_get_addr(). usually it is an array of size_t.
* reduce impact of REG_* namespace pollution in x86[_64] signal.hRich Felker2017-01-041-23/+46
| | | | | | | | | | | | | | | | | | when _GNU_SOURCE is defined, which is always the case when compiling c++ with gcc, these macros for the the indices in gregset_t are exposed and likely to clash with applications. by using enum constants rather than macros defined with integer literals, we can make the clash slightly less likely to break software. the macros are still defined in case anything checks for them with #ifdef, but they're defined to expand to themselves so that non-file-scope (e.g. namespaced) identifiers by the same names still work. for the sake of avoiding mistakes, the changes were generated with sed via the command: sed -i -e 's/#define *\(REG_[A-Z_0-9]\{1,\}\) *\([0-9]\{1,\}\)'\ '/enum { \1 = \2 };\n#define \1 \1/' \ arch/i386/bits/signal.h arch/x86_64/bits/signal.h arch/x32/bits/signal.h
* 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
* work around gdb issues recognizing sigreturn trampoline on x86_64Rich Felker2016-11-121-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | gdb can only backtrace/unwind across signal handlers if it recognizes the sa_restorer trampoline. for x86_64, gdb first attempts to determine the symbol name for the function in which the program counter resides and match it against "__restore_rt". if no name can be found (e.g. in the case of a stripped binary), the exact instruction sequence is matched instead. when matching the function name, however, gdb's unwind code wrongly considers the interval [sym,sym+size] rather than [sym,sym+size). thus, if __restore_rt begins immediately after another function, gdb wrongly identifies pc as lying within the previous adjacent function. this patch adds a nop before __restore_rt to preclude that possibility. it also removes the symbol name __restore and replaces it with a macro since the stability of whether gdb identifies the function as __restore_rt or __restore is not clear. for the no-symbols case, the instruction sequence is changed to use %rax rather than %eax to match what gdb expects. based on patch by Szabolcs Nagy, with extended description and corresponding x32 changes added.
* fix preadv2 and pwritev2 syscall numbers on x32 for linux v4.8Szabolcs Nagy2016-10-201-2/+2
| | | | | the numbers were wrong in musl, but they were also wrong in the kernel and got fixed in v4.8 commit 3ebfd81f7fb3e81a754e37283b7f38c62244641a
* 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 Felker2016-07-035-14/+7
| | | | | | | | | | | | | | 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 Nagy2016-07-031-197/+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 Bingham2016-05-121-324/+0
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* x32: eliminate __X32_SYSCALL_BIT constantBobby Bingham2016-05-121-317/+316
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* x32: remove arch-specific syscall remappingBobby Bingham2016-05-121-20/+0
| | | | | These system calls are already all remapped in an arch-agnostic manner in src/internal/syscall.h
* fix regression disabling use of pause instruction for x86 a_spinRich Felker2016-03-291-1/+1
| | | | | | | | | | | commits e24984efd5c6ac5ea8e6cb6cd914fa8435d458bc and 16b55298dc4b6a54d287d7494e04542667ef8861 inadvertently disabled the a_spin implementations for i386, x86_64, and x32 by defining a macro named a_pause instead of a_spin. this should not have caused any functional regression, but it inhibited cpu relaxation while spinning for locks. bug reported by George Kulakowski.
* 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 Nagy2016-03-181-59/+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.
* deduplicate the bulk of the arch bits headersRich Felker2016-01-276-314/+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
* move x32 sysinfo impl and syscall fixup code out of arch/x32/srcRich Felker2016-01-222-88/+0
| | | | | all such arch-specific translation units are being moved to appropriate arch dirs under the main src tree.
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-10 15:05:54 +0000