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author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2016-11-02 15:41:15 -0200 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2016-12-28 20:28:56 -0200 |
commit | 63719cf1e378b1a01ec6a36cf0ab7462cfb7a6c6 (patch) | |
tree | 0451eb07430e7bbddb19b0e48e31a49c101116b0 /include/utmp.h | |
parent | 5e628dd118807981bdd880731e6fdf019f64a245 (diff) | |
download | glibc-63719cf1e378b1a01ec6a36cf0ab7462cfb7a6c6.tar.gz glibc-63719cf1e378b1a01ec6a36cf0ab7462cfb7a6c6.tar.xz glibc-63719cf1e378b1a01ec6a36cf0ab7462cfb7a6c6.zip |
Add __ASSUME_DIRECT_SYSVIPC_SYSCALL for Linux
On current minimum supported kernels, the SysV IPC on Linux is provided by either the ipc syscalls or correspondent wire syscalls. Also, for architectures that supports wire syscalls all syscalls are supported in a set (msgct, msgrcv, msgsnd, msgget, semctl, semget, semop, semtimedop, shmctl, shmat, shmget, shmdt). The architectures that only supports ipc syscall are: - i386, m68k, microblaze, mips32, powerpc (powerpc32, powerpc64, and powerpc64le), s390 (32 and 64 bits), sh, sparc32, and sparc64. And the architectures that only supports wired syscalls are: - aarch64, alpha, hppa, ia64, mips64, mips64n32, nios2, tile (tilepro, tilegx, and tilegx64), and x86_64 Also arm is the only one that supports both wire syscalls and the ipc, although the ipc one is deprecated. This patch adds a new define, __ASSUME_DIRECT_SYSVIPC_SYSCALL, that wired syscalls are supported on the system and the general idea is to use it where possible. I also checked the syscall table for all architectures on Linux 4.9 and there is no change on described support for Linux 2.6.32/3.2. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): New define. * sysdeps/unix/sysv/linux/i386/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Undef. * sysdeps/unix/sysv/linux/m68k/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/mips/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/powerpc/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/s390/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/sh/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/sparc/kernel-features.h (__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
Diffstat (limited to 'include/utmp.h')
0 files changed, 0 insertions, 0 deletions