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asm-generic/unistd.h and glibc use of NR_ipc
- From: Linas Vepstas <linasvepstas at gmail dot com>
- To: Arnd Bergmann <arnd at arndb dot de>, GLIBC Devel <libc-alpha at sourceware dot org>
- Cc: linux-kernel at vger dot kernel dot org
- Date: Mon, 27 Sep 2010 18:26:29 -0500
- Subject: asm-generic/unistd.h and glibc use of NR_ipc
- Reply-to: linasvepstas at gmail dot com
I'm trying to figure out the status of glibc w.r.t the latest linux
unistd syscall interface, specifically, the status of the NR_ipc
syscall. Currently, I see the following:
-- Circa June 2009, Arnd Bergman introduced asm-generic/unistd.h
(into the linux kernel) to provide a generic interface to system
calls. It does *not* define NR_ipc, and instead provides
NR_msgsnd, msgrcv, msgget, msgctl etc. syscalls.
-- Current glibc (2.12.1, as well as the current eglibc) does
not appear to use these new calls anywhere. Instead, glibc
has generic (non-arch-specific) implementations of msgsnd
etc. that use the old NR_ipc interface (see, e.g.
sysdeps/unix/sysv/linux/msgsnd.c, semget.c, shmdt.c, msgrcv.c,
Is someone working on patches to get glibc to use the new
syscall interfaces (for IPC)? Am I missing something? Seems like
any arch wishing to use asm-generic/unistd.h and get glibc working
gets to break new ground, here ... right?