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This patch adjusts the defaults for kernel-features.h macros relating to availability of accept4, recvmmsg and sendmmsg. It is not intended to affect which macros end up getting defined in any configuration. At present, all architectures with syscalls for those functions need to define __ASSUME_*_SYSCALL macros; in particular, any new architecture needs its own kernel-features.h file for that purpose, though it may not otherwise need such a header. Those macros are then used together with __ASSUME_SOCKETCALL to define macros for whether the functions in question are available. This patch changes the defaults so that the syscalls are assumed to be available by default with recent-enough kernels, and it is the responsibility of architecture headers to undefine the macros if they are unavailable in supported kernels at least as recent as the version where the architecture-independent functionality was introduced. The __ASSUME_<function> macros are defaulted similarly instead of being defined based on other macros (defining based on other macros would no longer work because the #undefs appear after the generic header is included), so where the syscall being unavailable means the function is unavailable this means the architecture header has to undefine the __ASSUME_<function> macro; this only affects __ASSUME_ACCEPT4 for ia64, as other cases where the syscalls were added late enough to be relevant with current kernel version requirements are all on socketcall architectures. As a consequence, the AArch64 and Nios II kernel-features.h header files are removed, and others simplified. When the minimum kernel version becomes 4.3 or later on all architectures, the syscalls in question can just be assumed unconditionally, permitting further simplification. Tested for x86_64, x86 and powerpc (that installed shared libraries are unchanged by the patch, and testsuite for x86_64 and x86). * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_ACCEPT4_SYSCALL): Define unconditionally. (__ASSUME_ACCEPT4): Likewise. [__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_RECVMMSG_SYSCALL): Define. [__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_RECVMMSG): Likewise. [__LINUX_KERNEL_VERSION >= 0x030000] (__ASSUME_SENDMMSG_SYSCALL): Likewise. [__LINUX_KERNEL_VERSION >= 0x030000] (__ASSUME_SENDMMSG): Likewise. * sysdeps/unix/sysv/linux/aarch64/kernel-features.h: Remove file. * sysdeps/unix/sysv/linux/nios2/kernel-features.h: Likewise. * sysdeps/unix/sysv/linux/alpha/kernel-features.h (__ASSUME_RECVMMSG_SYSCALL): Do not define. (__ASSUME_ACCEPT4_SYSCALL): Likewise. (__ASSUME_SENDMMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/arm/kernel-features.h (__ASSUME_RECVMMSG_SYSCALL): Likewise. (__ASSUME_ACCEPT4_SYSCALL): Likewise. (__ASSUME_SENDMMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/hppa/kernel-features.h (__ASSUME_ACCEPT4_SYSCALL): Likewise. (__ASSUME_RECVMMSG_SYSCALL): Likewise. (__ASSUME_SENDMMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/i386/kernel-features.h [__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_RECVMMSG_SYSCALL): Likewise. [__LINUX_KERNEL_VERSION >= 0x030000] (__ASSUME_SENDMMSG_SYSCALL): Likewise. (__ASSUME_ACCEPT4_SYSCALL): Undefine if [__LINUX_KERNEL_VERSION < 0x040300] instead of defining if [__LINUX_KERNEL_VERSION >= 0x040300]. * sysdeps/unix/sysv/linux/ia64/kernel-features.h (__ASSUME_RECVMMSG_SYSCALL): Do not define. (__ASSUME_SENDMMSG_SYSCALL): Likewise. (__ASSUME_ACCEPT4_SYSCALL): Undefine if [__LINUX_KERNEL_VERSION < 0x030300] instead of defining if [__LINUX_KERNEL_VERSION >= 0x030300]. [__LINUX_KERNEL_VERSION < 0x030300] (__ASSUME_ACCEPT4): Undefine. * sysdeps/unix/sysv/linux/m68k/kernel-features.h (__ASSUME_ACCEPT4_SYSCALL): Undefine if [__LINUX_KERNEL_VERSION < 0x040300] instead of defining if [__LINUX_KERNEL_VERSION >= 0x040300]. (__ASSUME_RECVMMSG_SYSCALL): Likewise. (__ASSUME_SENDMMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/microblaze/kernel-features.h (__ASSUME_ACCEPT4_SYSCALL): Do not define. (__ASSUME_RECVMMSG_SYSCALL): Likewise. (__ASSUME_SENDMMSG_SYSCALL): Undefine if [__LINUX_KERNEL_VERSION < 0x030300] instead of defining if [__LINUX_KERNEL_VERSION >= 0x030300]. * sysdeps/unix/sysv/linux/mips/kernel-features.h (__ASSUME_ACCEPT4_SYSCALL): Do not define. (__ASSUME_RECVMMSG_SYSCALL): Likewise. (__ASSUME_SENDMMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/powerpc/kernel-features.h (__ASSUME_ACCEPT4_SYSCALL): Likewise. (__ASSUME_RECVMMSG_SYSCALL): Likewise. (__ASSUME_SENDMMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/s390/kernel-features.h (__ASSUME_ACCEPT4_SYSCALL): Undefine if [__LINUX_KERNEL_VERSION < 0x040300] instead of defining if [__LINUX_KERNEL_VERSION >= 0x040300]. (__ASSUME_RECVMMSG_SYSCALL): Likewise. (__ASSUME_SENDMMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/sh/kernel-features.h (__ASSUME_ACCEPT4_SYSCALL): Do not define. (__ASSUME_RECVMMSG_SYSCALL): Likewise. (__ASSUME_SENDMMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/sparc/kernel-features.h (__ASSUME_ACCEPT4_SYSCALL): Likewise. (__ASSUME_RECVMMSG_SYSCALL): Likewise. (__ASSUME_SENDMMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/tile/kernel-features.h (__ASSUME_ACCEPT4_SYSCALL): Likewise. (__ASSUME_RECVMMSG_SYSCALL): Likewise. (__ASSUME_SENDMMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/x86_64/kernel-features.h (__ASSUME_ACCEPT4_SYSCALL): Likewise. [__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_RECVMMSG_SYSCALL): Likewise. [__LINUX_KERNEL_VERSION >= 0x030000] (__ASSUME_SENDMMSG_SYSCALL): Likewise. |
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| .. | ||
| bits | ||
| sys | ||
| tilegx | ||
| tilepro | ||
| arch-fork.h | ||
| cacheflush.c | ||
| clone.S | ||
| dl-static.c | ||
| getcontext.S | ||
| Implies | ||
| init-first.c | ||
| kernel-features.h | ||
| ldsodefs.h | ||
| libc-vdso.h | ||
| makecontext.c | ||
| Makefile | ||
| profil-counter.h | ||
| pt-vfork.c | ||
| set_dataplane.c | ||
| setcontext.S | ||
| shlib-versions | ||
| sigcontextinfo.h | ||
| swapcontext.S | ||
| syscall.S | ||
| sysconf.c | ||
| sysdep-cancel.h | ||
| sysdep.c | ||
| sysdep.h | ||
| ucontext_i.h | ||
| Versions | ||
| vfork.S | ||
| waitpid.S | ||