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authorAndreas Schwab <schwab@suse.de>1999-01-13 01:43:33 +0000
committerAndreas Schwab <schwab@suse.de>1999-01-13 01:43:33 +0000
commit9ddcbe57b0727d9c222c10ac1484b76d2cd4b1e8 (patch)
tree56c0fc2940a0f706fa71a13857fe1e2b7b4d9508 /sysdeps/unix/sysv/linux/m68k/vfork.S
parent7c97addd6fbb44818b6e4d219cdbd189554a10f3 (diff)
downloadglibc-9ddcbe57b0727d9c222c10ac1484b76d2cd4b1e8.tar.gz
* sysdeps/unix/sysv/linux/m68k/vfork.S: New file.
1999-01-13 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * sysdeps/unix/sysv/linux/m68k/vfork.S: New file.
Diffstat (limited to 'sysdeps/unix/sysv/linux/m68k/vfork.S')
-rw-r--r--sysdeps/unix/sysv/linux/m68k/vfork.S65
1 files changed, 65 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/m68k/vfork.S b/sysdeps/unix/sysv/linux/m68k/vfork.S
new file mode 100644
index 0000000000..e5761f9371
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/m68k/vfork.S
@@ -0,0 +1,65 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andreas Schwab <schwab@gnu.org>.
+
+ 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <sysdep.h>
+#define _ERRNO_H 1
+#include <bits/errno.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)
+
+#ifdef __NR_vfork
+
+ /* Pop the return PC value into A0. */
+ movel %sp@+, %a0
+
+ /* Stuff the syscall number in D0 and trap into the kernel. */
+ movel #SYS_ify (vfork), %d0
+ trap #0
+ tstl %d0
+ jmi .Lerror /* Branch forward if it failed. */
+
+ /* Jump to the return PC. */
+ jmp %a0@
+
+.Lerror:
+ /* Push back the return PC. */
+ movel %a0,%sp@-
+
+ /* Check if vfork syscall is known at all. */
+ movel #-ENOSYS,%d1
+ cmpl %d0,%d1
+ jne SYSCALL_ERROR_LABEL
+
+#endif
+
+ /* If we don't have vfork, fork is close enough. */
+
+ movel #SYS_ify (fork), %d0
+ trap #0
+ jmi SYSCALL_ERROR_LABEL
+ rts
+
+PSEUDO_END (__vfork)
+
+weak_alias (__vfork, vfork)