AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-12-22 19:00:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add __ASSUME_DIRECT_SYSVIPC_SYSCALL for Linux

Browse Source 
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.
This commit is contained in:
Adhemerval Zanella 2016-11-02 15:41:15 -02:00
parent 5e628dd118
commit 63719cf1e3
9 changed files with 43 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
ChangeLog
View File

@ -1,3 +1,22 @@
2016-12-28 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/unix/sysv/linux/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): New define.
* sysdeps/unix/sysv/linux/i386/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Undef.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
* sysdeps/unix/sysv/linux/powerpc/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
* sysdeps/unix/sysv/linux/s390/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
* sysdeps/unix/sysv/linux/sh/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
* sysdeps/unix/sysv/linux/sparc/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
2016-12-28 Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
* sysdeps/powerpc/powerpc32/power7/memchr.S (__memchr): Avoid an

3
sysdeps/unix/sysv/linux/i386/kernel-features.h
View File

@ -52,3 +52,6 @@
# undef __ASSUME_SENDMSG_SYSCALL
# undef __ASSUME_RECVMSG_SYSCALL
#endif
/* i686 only supports ipc syscall. */
#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS

4
sysdeps/unix/sysv/linux/kernel-features.h
View File

@ -147,3 +147,7 @@
separate syscalls were only added later. */
#define __ASSUME_SENDMSG_SYSCALL 1
#define __ASSUME_RECVMSG_SYSCALL 1
/* Support for SysV IPC through wired syscalls. All supported architectures
either support ipc syscall and/or all the ipc correspondent syscalls. */
#define __ASSUME_DIRECT_SYSVIPC_SYSCALLS 1

3
sysdeps/unix/sysv/linux/m68k/kernel-features.h
View File

@ -54,3 +54,6 @@
# undef __ASSUME_REQUEUE_PI
# undef __ASSUME_SET_ROBUST_LIST
#endif
/* m68k only supports ipc syscall. */
#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS

2
sysdeps/unix/sysv/linux/mips/kernel-features.h
View File

@ -32,6 +32,8 @@
pairs to start with an even-number register. */
#if _MIPS_SIM == _ABIO32
# define __ASSUME_ALIGNED_REGISTER_PAIRS 1
/* mips32 only supports ipc syscall. */
# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
#endif
/* Define that mips64-n32 is a ILP32 ABI to set the correct interface to

3
sysdeps/unix/sysv/linux/powerpc/kernel-features.h
View File

@ -52,3 +52,6 @@
#endif
#include_next <kernel-features.h>
/* powerpc only supports ipc syscall. */
#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS

3
sysdeps/unix/sysv/linux/s390/kernel-features.h
View File

@ -48,3 +48,6 @@
# undef __ASSUME_SENDMSG_SYSCALL
# undef __ASSUME_RECVMSG_SYSCALL
#endif
/* s390 only supports ipc syscall. */
#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS

3
sysdeps/unix/sysv/linux/sh/kernel-features.h
View File

@ -54,4 +54,7 @@
before the offset. */
#define __ASSUME_PRW_DUMMY_ARG 1
/* sh only supports ipc syscall. */
#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
#endif

3
sysdeps/unix/sysv/linux/sparc/kernel-features.h
View File

@ -37,3 +37,6 @@
# undef __ASSUME_REQUEUE_PI
# undef __ASSUME_SET_ROBUST_LIST
#endif
/* sparc only supports ipc syscall. */
#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS