5 files changed, 116 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/mlock.S b/sysdeps/unix/sysv/linux/mlock.S
new file mode 100644
index 0000000000..b14f51deba
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mlock.S
@@ -0,0 +1,24 @@
+/* Copyright (C) 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>
+
+SYSCALL__ (mlock, 2)
+	ret
+
+weak_alias (__mlock, mlock)
diff --git a/sysdeps/unix/sysv/linux/mlockall.S b/sysdeps/unix/sysv/linux/mlockall.S
new file mode 100644
index 0000000000..939ec01f0b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mlockall.S
@@ -0,0 +1,24 @@
+/* Copyright (C) 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>
+
+SYSCALL__ (mlockall, 1)
+	ret
+
+weak_alias (__mlockall, mlockall)
diff --git a/sysdeps/unix/sysv/linux/munlock.S b/sysdeps/unix/sysv/linux/munlock.S
new file mode 100644
index 0000000000..50fe9332ee
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/munlock.S
@@ -0,0 +1,24 @@
+/* Copyright (C) 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>
+
+SYSCALL__ (munlock, 2)
+	ret
+
+weak_alias (__munlock, munlock)
diff --git a/sysdeps/unix/sysv/linux/munlockall.S b/sysdeps/unix/sysv/linux/munlockall.S
new file mode 100644
index 0000000000..7d8aeb4683
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/munlockall.S
@@ -0,0 +1,24 @@
+/* Copyright (C) 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>
+
+SYSCALL__ (munlockall, 0)
+	ret
+
+weak_alias (__munlockall, munlockall)
diff --git a/sysdeps/unix/sysv/linux/sys/mman.h b/sysdeps/unix/sysv/linux/sys/mman.h
index b05738d8e4..9f0ef72100 100644
--- a/sysdeps/unix/sysv/linux/sys/mman.h
+++ b/sysdeps/unix/sysv/linux/sys/mman.h
@@ -17,10 +17,6 @@ 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.  */
 
-/* These are the bits used by 4.4 BSD and its derivatives.  On systems
-   (such as GNU) where these facilities are not system services but can be
-   emulated in the C library, these are the definitions we emulate.  */
-
 #ifndef	_SYS_MMAN_H
 
 #define	_SYS_MMAN_H	1
@@ -70,6 +66,10 @@ Cambridge, MA 02139, USA.  */
 #define	MADV_WILLNEED	3	/* Will need these pages.  */
 #define	MADV_DONTNEED	4	/* Don't need these pages.  */
 
+/* Flags to `mlockall'.  */
+#define MCL_CURRENT     1	/* Lock all current mappings.  */
+#define MCL_FUTURE      2	/* Lock all future mappings.  */
+
 #include <sys/cdefs.h>
 
 __BEGIN_DECLS
@@ -106,6 +106,22 @@ int msync __P ((__caddr_t __addr, size_t __len));
    for the region starting at ADDR and extending LEN bytes.  */
 int madvise __P ((__caddr_t __addr, size_t __len, int __advice));
 
+/* Cause all currently mapped pages of the process to be memory resident
+   until unlocked by a call to the `munlockall', until the process exits,
+   or until the process calls `execve'.  */
+int mlockall __P ((int __flags));
+
+/* All currently mapped pages of the process' address space become
+   unlocked.  */
+int munlockall __P ((void));
+
+/* Guarantee all whole pages mapped by the range [ADDR,ADDR+LEN) to
+   be memory resident.  */
+int mlock __P ((__caddr_t __addr, size_t __len));
+
+/* Unlock whole pages previously mapped by the range [ADDR,ADDR+LEN).  */
+int munlock __P ((__caddr_t __addr, size_t __len));
+
 __END_DECLS