diff options
Diffstat (limited to 'libc/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S')
-rw-r--r-- | libc/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/libc/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S b/libc/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S new file mode 100644 index 000000000..4b035a61f --- /dev/null +++ b/libc/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S @@ -0,0 +1,57 @@ +/* Copyright (C) 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#define _ERRNO_H 1 +#include <bits/errno.h> +#include <kernel-features.h> +#include <tcb-offsets.h> + +/* Clone the calling process, but without copying the whole address space. + The calling process is suspended until the new process exits or is + replaced by a call to `execve'. Return -1 for errors, 0 to the new process, + and the process ID of the new process to the old process. */ + +ENTRY (__vfork) + lwz 0,PID(2) + cmpwi 0,0,0 + neg 0,0 + bne- 0,1f + lis 0,0x8000 +1: stw 0,PID(2) + + DO_CALL (SYS_ify (vfork)) + + cmpwi 1,3,0 + beqlr- 1 + + lwz 0,PID(2) + /* Cannot use clrlwi. here, because cr0 needs to be preserved + until PSEUDO_RET. */ + clrlwi 4,0,1 + cmpwi 1,4,0 + beq- 1,1f + neg 4,0 +1: stw 4,PID(2) + + PSEUDO_RET + +PSEUDO_END (__vfork) +libc_hidden_def (__vfork) +weak_alias (__vfork, vfork) |