diff options
| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2016-11-02 15:41:15 -0200 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2016-12-28 20:28:56 -0200 |
| commit | 63719cf1e378b1a01ec6a36cf0ab7462cfb7a6c6 (patch) | |
| tree | 0451eb07430e7bbddb19b0e48e31a49c101116b0 /sysdeps/unix/sysv/linux/i386/kernel-features.h | |
| parent | 5e628dd118807981bdd880731e6fdf019f64a245 (diff) | |
| download | glibc-63719cf1e378b1a01ec6a36cf0ab7462cfb7a6c6.zip glibc-63719cf1e378b1a01ec6a36cf0ab7462cfb7a6c6.tar.gz glibc-63719cf1e378b1a01ec6a36cf0ab7462cfb7a6c6.tar.bz2 | |
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 'sysdeps/unix/sysv/linux/i386/kernel-features.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/kernel-features.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/kernel-features.h b/sysdeps/unix/sysv/linux/i386/kernel-features.h index 148963c..0a557f8 100644 --- a/sysdeps/unix/sysv/linux/i386/kernel-features.h +++ b/sysdeps/unix/sysv/linux/i386/kernel-features.h @@ -52,3 +52,6 @@ # undef __ASSUME_SENDMSG_SYSCALL # undef __ASSUME_RECVMSG_SYSCALL #endif + +/* i686 only supports ipc syscall. */ +#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS |