diff options
author | Roland McGrath <roland@gnu.org> | 1995-03-06 00:27:08 +0000 |
---|---|---|
committer | Roland McGrath <roland@gnu.org> | 1995-03-06 00:27:08 +0000 |
commit | 6408bdde65cac02ef96ae9f2b77f222b534c0e75 (patch) | |
tree | 3a10be5fdb3d11bdd95f31a2615c266d5f3e0762 /sysdeps/unix/bsd/sun/m68k | |
parent | 4933a099c29045e0615139c9a55d77862ae8ae6c (diff) | |
download | glibc-6408bdde65cac02ef96ae9f2b77f222b534c0e75.tar.gz glibc-6408bdde65cac02ef96ae9f2b77f222b534c0e75.tar.xz glibc-6408bdde65cac02ef96ae9f2b77f222b534c0e75.zip |
Fri Mar 3 12:24:52 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* 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.
Diffstat (limited to 'sysdeps/unix/bsd/sun/m68k')
-rw-r--r-- | sysdeps/unix/bsd/sun/m68k/vfork.S | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/sun/m68k/vfork.S b/sysdeps/unix/bsd/sun/m68k/vfork.S new file mode 100644 index 0000000000..cb7dae8d2b --- /dev/null +++ b/sysdeps/unix/bsd/sun/m68k/vfork.S @@ -0,0 +1,55 @@ +/* Copyright (C) 1991, 1992, 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> + +#ifndef SYS_vfork +#define SYS_vfork 66 +#endif + +/* Clone the calling process, but without copying the whole address space. + The the calling process is suspended until the 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. */ +.globl ___vfork +___vfork: + /* Pop the return PC value into A0. */ + movel sp@+, a0 + + /* Push the syscall number and trap into the kernel. */ + movel #SYS_vfork, sp@- + trap #0 + bcs error /* Branch forward if it failed. */ + + /* It succeeded. See which fork we're in. D1 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 D0, so the parent gets D0&-1==R0, and the child + gets D0&0==0. */ + decl d1 + andl d1, d0 + + /* Jump to the return PC. */ + jmp a0@ + +error: + movel d0, _errno + moveq #-1, d0 + jmp a0@ + +weak_alias (__vfork, vfork) |