mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
6408bdde65
* sysdeps/generic/sys/mman.h (__mmap, __munmap): Declare these. * sysdeps/unix/sysv/irix4/sys/mman.h: Likewise. * sysdeps/unix/bsd/ultrix4/sys/mman.h: Likewise. * sysdeps/unix/bsd/osf1/sys/mman.h: Likewise. * sysdeps/unix/bsd/sun/sunos4/sys/mman.h: Likewise. * sysdeps/stub/munmap.c (munmap): Rename to __munmap, add weak alias munmap. * sysdeps/unix/mman/munmap.S: Likewise. * sysdeps/mach/munmap.c: Likewise. * sysdeps/mach/hurd/mmap.c (mmap): Rename to __mmap, add weak alias mmap. * sysdeps/unix/mman/mmap.S: Likewise. * sysdeps/unix/bsd/sun/sunos4/mmap.c: Likewise. * sysdeps/stub/mmap.c: Likewise. * sysdeps/unix/bsd/setsid.c: Use __getpgid instead of __getpgrp. * sysdeps/unix/dirfd.c: #undef dirfd before function defn. Thu Mar 2 12:15:24 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * misc/search.h: Add missing semicolon. * sysdeps/unix/dirfd.c: Fix typo. * sysdeps/generic/sys/mman.h (mmap): Use __off_t instead of off_t in decl. * stdio/vfscanf.c (%c): In no-assign case, fix loop to decrement WIDTH before test.
40 lines
1.5 KiB
ArmAsm
40 lines
1.5 KiB
ArmAsm
/* Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
/* Since vfork shares the address space between the parent and child,
|
|
we must take care to avoid the child unwinding the stack frame and
|
|
clobbering it for the parent. */
|
|
|
|
.text
|
|
ENTRY (__vfork)
|
|
popl scratch /* Save the return PC in a register. */
|
|
DO_CALL (vfork, 0) /* Do the system call. */
|
|
pushl scratch /* Put the return PC back on the stack. */
|
|
jb syscall_error /* Branch if error. */
|
|
/* R1 is now 0 for the parent and 1 for the child. Decrement it to
|
|
make it -1 (all bits set) for the parent, and 0 (no bits set)
|
|
for the child. Then AND it with R0, so the parent gets
|
|
R0&-1==R0, and the child gets R0&0==0. */
|
|
decl r1
|
|
andl r1, r0
|
|
ret
|
|
|
|
weak_alias (__vfork, vfork)
|