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2019-11-05fix build regression on mips64 due to endian.h removalRich Felker1-0/+2
commit 4d3a162d001a93edd285fb6603a883c30ae553ba overlooked that the mips64 reloc.h dependent on endian.h not only for setting the ABI ldso name to match the byte order, but also for use of the byte swapping macros. they are needed to override R_TYPE, R_SYM, and R_INFO, to compensate for a mips "quirk" of always using big endian order for symbol references in relocations. part of that commit canot be reverted because the original code was wrong: it's invalid to define _GNU_SOURCE or any feature test macro in reloc.h, or anywhere except at the top of a source file. however, thanks to commit 316730cdc7a330cddf288b4e5c1de5daa64e19f4, the feature test macro is no longer needed to access the endian-swapping macros, so simply bringing back the #include directive suffices.
2019-11-02move time_t and suseconds_t definitions to common alltypes.h.inRich Felker16-48/+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.
2019-11-02move time64 ioctl numbers to generic bits/ioctl.hRich Felker6-21/+5
now that all 32-bit archs have 64-bit time types, the values for the time-related ioctls can be shared. the mechanism for this is an arch/generic version of the bits header. archs which don't use the generic header still need to duplicate the definitions. x32, which does not use the new time64 values of the macros, already has its own overrides, so this commit does not affect it.
2019-11-02move time64 socket options from arch bits to top-level sys/socket.hRich Felker9-45/+0
now that all 32-bit archs have 64-bit time types, the values for the time-related socket option macros can be treated as universal for 32-bit archs. the sys/socket.h mechanism for this predates arch/generic and is instead in the top-level header. x32, which does not use the new time64 values of the macros, already has its own overrides, so this commit does not affect it.
2019-11-02switch all existing 32-bit archs to 64-bit time_tRich Felker85-217/+420
this commit preserves ABI fully for existing interface boundaries between libc and libc consumers (applications or libraries), by retaining existing symbol names for the legacy 32-bit interfaces and redirecting sources compiled against the new headers to alternate symbol names. this does not necessarily, however, preserve the pairwise ABI of libc consumers with one another; where they use time_t-derived types in their interfaces with one another, it may be necessary to synchronize updates with each other. the intent is that ABI resulting from this commit already be stable and permanent, but it will not be officially so until a release is made. changes to some header-defined types that do not play any role in the ABI between libc and its consumers may still be subject to change. mechanically, the changes made by this commit for each 32-bit arch are as follows: - _REDIR_TIME64 is defined to activate the symbol redirections in public headers - COMPAT_SRC_DIRS is defined in arch.mak to activate build of ABI compat shims to serve as definitions for the original symbol names - time_t and suseconds_t definitions are changed to long long (64-bit) - IPC_STAT definition is changed to add the IPC_TIME64 bit (0x100), triggering conversion of semid_ds, shmid_ds, and msqid_ds split low/high time bits into new time_t members - structs semid_ds, shmid_ds, msqid_ds, and stat are modified to add new 64-bit time_t/timespec members at the end, maintaining existing layout of other members. - socket options (SO_*) and ioctl (sockios) command macros are redefined to use the kernel's "_NEW" values. in addition, on archs where vdso clock_gettime is used, the VDSO_CGT_SYM macro definition in syscall_arch.h is changed to use a new time64 vdso function if available, and a new VDSO_CGT32_SYM macro is added for use as fallback on kernels lacking time64.
2019-11-02add x32 bits/ioctl_fix.h defining time-related sockios macrosRich Felker1-0/+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.
2019-11-02add back x32 bits/socket.h defining time-related socket optionsRich Felker1-0/+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.
2019-11-02move msghdr and cmsghdr out of bits/socket.hRich Felker10-208/+0
these structures can now be defined generically in terms of endianness and long size. previously, the 32-bit archs all shared a common definition from the generic bits header, and each 64-bit arch had to repeat the 64-bit version, with endian conditionals if the arch had variants of each endianness. I would prefer getting rid of the preprocessor conditionals for padding and instead using unnamed bitfield members, like commit 9b2921bea1d5017832e1b45d1fd64220047a9802 did for struct timespec. however, at present sendmsg, recvmsg, and recvmmsg need access to the padding members by name to zero them. this could perhaps be cleaned up in the future.
2019-11-02fix x32 msghdr struct by removing x32 bits/socket.hRich Felker1-16/+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.
2019-10-28add missing m68k user.h/procfs.h regset typesRich Felker1-0/+5
2019-10-19internally, define time64 rusage syscalls on x32 as the existing onesRich Felker1-0/+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.
2019-10-19use struct pt_regs * rather than void * for powerpc[64] sigcontext regsRich Felker2-2/+2
this is to match the kernel and glibc interfaces. here, struct pt_regs is an incomplete type, but that's harmless, and if it's completed by inclusion of another header then members of the struct pointed to by the regs member can be accessed directly without going through a cast or intermediate pointer object.
2019-10-19fix fpregset_t type on powerpc64Rich Felker1-5/+1
the userspace ucontext API has this as an array rather than a structure. commit 3c59a868956636bc8adafb1b168d090897692532 fixed the corresponding mistake for vrregset_t, namely that the original powerpc64 port used a mix of types from 32-bit powerpc and powerpc64 rather than matching the 64-bit types.
2019-10-17move pthread types out of per-arch alltypes.hRich Felker16-128/+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.
2019-10-17define LONG_MAX via arch alltypes.h, strip down bits/limits.hRich Felker33-112/+24
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.
2019-10-17remove use of endian.h from arch reloc.h headers, clean upRich Felker9-24/+0
building on commit 97d35a552ec5b6ddf7923dd2f9a8eb973526acea, __BYTE_ORDER is now available wherever alltypes.h is included. since reloc.h is only used from src/internal/dynlink.h, it can be assumed that __BYTE_ORDER is exposed. reloc.h is not permitted to be included in other contexts, and generally, like most arch headers, lacks inclusion guards that would allow such usage. the mips64 version mistakenly included such guards; they are removed for consistency.
2019-10-17remove indirect use of endian.h from public headersRich Felker4-8/+0
building on commit 97d35a552ec5b6ddf7923dd2f9a8eb973526acea, __BYTE_ORDER is now available wherever alltypes.h is included. endian.h should not be used since, in the future, it will expose identifiers that are not in the reserved namespace for the headers which were previously using it.
2019-10-17move __BYTE_ORDER definition to alltypes.hRich Felker32-62/+64
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.
2019-10-17remove per-arch definitions for va_listRich Felker16-48/+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
2019-10-17remove i386 support for legacy struct __va_listRich Felker1-5/+0
commit ffaaa6d230512f3a7f3d040b943517728f3dc3cf removed the corresponding stdarg.h support for compilers without va_list builtins, but failed to remove the alternate type definition, leaving incorrect va_list definitions in place with compilers that don't define __GNUC__ with a value >= 3.
2019-10-02reintroduce riscv64 struct sigcontextRich Felker1-6/+10
commit ab3eb89a8b83353cdaab12ed017a67a7730f90e9 removed it as part of correcting the mcontext_t definition, but there is still code using struct sigcontext and expecting the member names present in it, most notably libgcc_eh. almost all such usage is incorrect, but bring back struct sigcontext at least for now so as not to introduce regressions.
2019-09-29fix riscv64 elf_fpregset_t type and member names mismatchRich Felker1-5/+2
in order for sys/procfs.h (provided by sys/user.h) to be useful, it needs to match the API its consumers (gdb, etc.) expect, including the member names established by glibc. this partly reverts commit 29e8737f81ccc9fbadcf61a75318aa3d0516aafa, which partly reverted d493206de7df4db07ad34f24701539ba0a6ed38c, eliminating struct user_fpregs_struct which seems to have had no precedent and using union __riscv_mc_fp_state for elf_fpregset_t. this requires indirect inclusion of signal.h to make union __riscv_mc_fp_state visible, but being that these are nonstandard "junk" headers with no official restrictions on what they can pull in, that's no big deal. split off and expanded from patch by Khem Raj.
2019-09-29fix riscv64 signal.h namespace violations and ucontext API mismatchesRich Felker2-27/+20
the top-level mcontext_t member names were namespace-violating in standards profiles before, and nested-level member names (some of them single-letter) were egregiously bad namespace impositions even in non-strict profiles. moreover, they mismatched those used in the public API first defined in glibc, breaking any code making use of them. unlike most archs, the public API used in glibc for riscv mcontext_t members was designed to be namespace-safe, so we can and should expose the members regardless of feature test macros. only the typedefs for greg_t, gregset_t, and fpregset_t need to be protected behind FTMs. the struct tags for mcontext_t and ucontext_t are also changed. for mcontext_t this is necessary to make the common definition across profiles namespace-safe. for ucontext_t, it's just a matter of matching the tag from the glibc-defined API. these changes are split off and expanded from a patch by Khem Raj.
2019-09-27clean up mips (32-bit, o32) syscall asm constraintsRich Felker1-31/+32
analogous to commit ddc7c4f936c7a90781072f10dbaa122007e939d0 for mips64 and n32, remove the hack to load the syscall number into $2 via asm, and use a constraint to let the compiler load it instead. now, only $4, $5, and $6 are potential input-only registers. $2 is always input and output, and $7 is both when it's an argument, otherwise output-only. previously, $7 was treated as an input (with a "1" constraint matching its output position) even when it was not an input, which was arguably undefined behavior (asm input from indeterminate value). this is corrected. as before, $8, $9, and $10 are conditionally input-output registers for 5-, 6-, and 7-argument syscalls. their role in input is carrying in the values that will be stored on the stack for arguments 5-7. their role in output is carrying back whatever the kernel has clobbered them with, so that the compiler cannot assume they still contain the input values.
2019-09-26fix mips r6 syscall clobber lists not to include hi/lo registersRich Felker3-16/+30
mips r6 (an incompatible isa from traditional mips) removes the hi and lo registers used for mul/div results. older gcc versions accepted them in the clobber list for asm, but their presence is incorrect and breaks on later versions. in the process of fixing this, the clobber list for 32-bit mips syscalls has been deduplicated via a macro like on mips64 and n32.
2019-09-25correct the operand specifiers in the riscv64 CAS routinesPalmer Dabbelt1-2/+2
The operand sepcifiers in a_cas and a_cas_p for riscv64 were incorrect: there's a backwards branch in the routine, so despite tmp being written at the end of the assembly fragment it cannot be allocated in one of the input registers because the input values may be needed for another trip around the loop. For code that follows the guaranteed forward progress requirements, the backwards branch is rarely taken: SiFive's hardware only fails a store conditional on execptional cases (ie, instruction cache misses inside the loop), and until recently a bug in QEMU allowed back-to-back store conditionals to succeed. The bug has been fixed in the latest QEMU release, but it turns out that the fix caused this latent bug in musl to manifest.
2019-09-11aarch64: add HWCAP2 flags from linux v5.2Szabolcs Nagy1-0/+8
AT_HWCAP2 flags, see linux commit 671db581815faf17cbedd7fcbc48823a247d90b1 arm64: Expose DC CVADP to userspace linux commit 06a916feca2b262ab0c1a2aeb68882f4b1108a07 arm64: Expose SVE2 features for userspace
2019-09-11add new syscall numbers from linux v5.2Szabolcs Nagy16-0/+97
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]
2019-09-08honor __WCHAR_TYPE__ on archs with legacy long definition of wchar_tRich Felker4-0/+16
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.
2019-08-19fix clash between sys/user.h and kernel ptrace.h on powerpc[64], shRich Felker3-41/+13
due to historical accident/sloppiness in glibc, the powerpc, powerpc64, and sh versions of struct user, defined by sys/user.h, used struct pt_regs from the kernel asm/ptrace.h for their regs member. this made it impossible to define the type in an API-compatible manner without either including asm/ptrace.h like glibc does (contrary to our policy of not depending on kernel headers), or clashing with asm/ptrace.h's definition of struct pt_regs if both headers are included (which is almost always the case in software using sys/user.h). for a long time I viewed this problem as having no reasonable fix. I even explored the possibility of having the powerpc[64] and sh versions of user.h just include the kernel header (breaking with policy), but that looked like it might introduce new clashes with sys/ptrace.h. and it would also bring in a lot of additional cruft that makes no sense for sys/user.h to expose. glibc goes out of its way to suppress some of that with #undef, possibly leading to different problems. this is a rabbit-hole that should be explored no further. as it turns out, however, nothing actually uses struct user sufficiently to care about the type of the regs member; most software including sys/user.h does not even use struct user at all. so, the problem can be fixed just by doing away with the insistence on strict glibc API compatibility for the struct tag of the regs member. rather than renaming the tag, which might lead to the new name entering use as API, simply use an untagged structure inside struct user with the same members/layout as struct pt_regs. for sh, struct pt_dspregs is just removed entirely since it was not used.
2019-08-13re-add ELF gregs and fpregs types to riscv64 user.hKhem Raj1-0/+8
d493206de7df4db07ad34f24701539ba0a6ed38c deleted all the content of user.h, but sys/procfs.h expects this from sys/user.h threfore we retain the non conflicting parts
2019-08-11add support for powerpc/powerpc64 unaligned relocationsSamuel Holland2-0/+2
R_PPC_UADDR32 (R_PPC64_UADDR64) has the same meaning as R_PPC_ADDR32 (R_PPC64_ADDR64), except that its address need not be aligned. For powerpc64, BFD ld(1) will automatically convert between ADDR<->UADDR relocations when the address is/isn't at its native alignment. This will happen if, for example, there is a pointer in a packed struct. gold and lld do not currently generate R_PPC64_UADDR64, but pass through misaligned R_PPC64_ADDR64 relocations from object files, possibly relaxing them to misaligned R_PPC64_RELATIVE. In both cases (relaxed or not) this violates the PSABI, which defines the relevant field type as "a 64-bit field occupying 8 bytes, the alignment of which is 8 bytes unless otherwise specified." All three linkers violate the PSABI on 32-bit powerpc, where the only difference is that the field is 32 bits wide, aligned to 4 bytes. Currently musl fails to load executables linked by BFD ld containing R_PPC64_UADDR64, with the error "unsupported relocation type 43". This change provides compatibility with BFD ld on powerpc64, and any static linker on either architecture that starts following the PSABI more closely.
2019-08-06remove riscv64 bits/user.h contentsRich Felker1-43/+0
the contents conflicted with asm/ptrace.h. glibc does not provide anything in user.h for riscv, so software cannot be depending on it. simplified from patch submitted by Baruch Siach.
2019-08-06fix risc64 conflict with kernel headersBaruch Siach1-8/+8
Rename user registers struct definitions to avoid conflict with the asm/ptrace.h kernel header that defines the same structs. Use the __riscv_mc prefix as glibc does.
2019-08-03update riscv64 syscall numbers to linux v5.1Rich Felker1-0/+8
commit f3f96f2daa4d00f0e38489fb465cd0244b531abe added these for the rest of the archs, but the patch it corresponded to missed riscv64 since riscv64 was not yet upstream at the time. this caused commit dfc81828f7ab41da08f744c44117a1bb20a05749 to break riscv64 build, due to a wrong assumption that SYS_statx was unconditionally defined.
2019-08-02move IPC_STAT definition to a new bits/ipcstat.h fileRich Felker10-0/+10
otherwise, 32-bit archs that could otherwise share the generic bits/ipc.h would need to duplicate the struct ipc_perm definition, obscuring the fact that it's the same. sysvipc is not widely used and these headers are not commonly included, so there is no performance gain to be had by limiting the number of indirectly included files here. files with the existing time32 definition of IPC_STAT are added to all current 32-bit archs now, so that when it's changed the change will show up as a change rather than addition of a new file where it's less obvious that the value is changing vs the generic one that was used before.
2019-07-31ioctl: add fallback for new time64 SIOCGSTAMP[NS]Rich Felker1-0/+3
without this, the SIOCGSTAMP and SIOCGSTAMPNS ioctl commands, for obtaining timestamps, would stop working on pre-5.1 kernels after time_t is switched to 64-bit and their values are changed to the new time64 versions. new code is written such that it's statically unreachable on 64-bit archs, and on existing 32-bit archs until the macro values are changed to activate 64-bit time_t.
2019-07-31get/setsockopt: add fallback for new time64 SO_RCVTIMEO/SO_SNDTIMEORich Felker5-0/+15
without this, the SO_RCVTIMEO and SO_SNDTIMEO socket options would stop working on pre-5.1 kernels after time_t is switched to 64-bit and their values are changed to the new time64 versions. new code is written such that it's statically unreachable on 64-bit archs, and on existing 32-bit archs until the macro values are changed to activate 64-bit time_t.
2019-07-30remove gratuitously-different arch-specific bits/ipc.h filesRich Felker3-36/+0
these differ from generic only in using endian-matched padding with a short __ipc_perm_seq field in place of the int field in generic. this is not a documented public interface anyway, and the original intent was to use int here. some ports just inadvertently slipped in the kernel short+padding form.
2019-07-30remove arch-specific bits/ipc.h that are identical to genericRich Felker2-22/+0
previously these differed from generic because they needed their own definitions of IPC_64. now that it's no longer in public header, they're identical.
2019-07-30move IPC_64 from public bits/ipc.h to syscall_arch.hRich Felker15-22/+10
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.
2019-07-29remove duplicates of new generic bits/msg.hRich Felker6-75/+0
2019-07-29use 64-bit msqid_ds layout in the generic version of bits/msg.hRich Felker1-3/+0
this layout is more common already than the old generic, and should become even more common in the future with new archs added and with 64-bit time_t on 32-bit archs.
2019-07-29duplicate generic bits/msg.h for each arch using it, in prep to changeRich Felker5-0/+75
2019-07-29remove duplicates of new generic bits/sem.hRich Felker5-57/+0
some of these were not exact duplicates, but had gratuitously different naming for padding, or omitted the endian checks because the arch is fixed-endian.
2019-07-29use 64-bit semid_ds layout in the generic version of bits/sem.hRich Felker1-2/+0
this layout is slightly less common than the old generic one, but only because x86_64 and x32 wrongly (according to comments in the kernel headers) copied the i386 padding. for future archs, and with 64-bit time_t on 32-bit archs, the new layout here will become the most common, and it makes sense to treat it as the generic.
2019-07-29collapse out byte order conditions in bits/sem.h for fixed-endian archsRich Felker4-20/+0
having preprocessor conditionals on byte order in the bits headers for fixed-endian archs is confusing at best. remove them.
2019-07-29duplicate generic bits/sem.h for each arch using it, in prep to changeRich Felker7-0/+112
2019-07-29extricate bits/sem.h from x32 time_t hackRich Felker7-25/+36
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.
2019-07-29remove trailing newlines from various versions of bits/shm.hRich Felker9-9/+0