Linux/MIPS vfork implementation.

diff --git a/sysdeps/unix/sysv/linux/mips/vfork.S b/sysdeps/unix/sysv/linux/mips/vfork.S
new file mode 100644 (file)
index 0000000..1383ddc
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/vfork.S
@@ -0,0 +1,98 @@
+/* Copyright (C) 2005 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 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.  */
+
+/* vfork() is just a special case of clone().  */
+
+#include <sys/asm.h>
+#include <sysdep.h>
+#include <asm/unistd.h>
+#include <sgidefs.h>
+
+#ifndef SAVE_PID
+#define SAVE_PID
+#endif
+
+#ifndef RESTORE_PID
+#define RESTORE_PID
+#endif
+
+
+/* int vfork() */
+
+       .text
+LOCALSZ= 1
+FRAMESZ= (((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK
+GPOFF= FRAMESZ-(1*SZREG)
+NESTED(__vfork,FRAMESZ,sp)
+#ifdef __PIC__
+       SETUP_GP
+#endif
+       PTR_SUBU sp, FRAMESZ
+       SETUP_GP64 (a5, __vfork)
+#ifdef __PIC__
+       SAVE_GP (GPOFF)
+#endif
+#ifdef PROF
+# if (_MIPS_SIM != _ABIO32)
+       PTR_S           a5, GPOFF(sp)
+# endif
+       .set            noat
+       move            $1, ra
+# if (_MIPS_SIM == _ABIO32)
+       subu            sp,sp,8
+# endif
+       jal             _mcount
+       .set            at
+# if (_MIPS_SIM != _ABIO32)
+       PTR_L           a5, GPOFF(sp)
+# endif
+#endif
+
+       PTR_ADDU        sp, FRAMESZ
+
+       SAVE_PID
+
+       li              a0, 0x4112      /* CLONE_VM | CLONE_VFORK | SIGCHLD */
+       move            a1, sp
+
+       /* Do the system call */
+       li              v0,__NR_clone
+       syscall
+
+       RESTORE_PID
+
+       bnez            a3,L(error)
+
+       /* Successful return from the parent or child.  */
+       RESTORE_GP64
+       ret
+
+       /* Something bad happened -- no child created.  */
+L(error):
+#ifdef __PIC__
+       PTR_LA          t9, __syscall_error
+       RESTORE_GP64
+       jr              t9
+#else
+       RESTORE_GP64
+       j               __syscall_error
+#endif
+       END(__vfork)
+
+libc_hidden_def(__vfork)
+weak_alias(__vfork, vfork)