* sysdeps/mach/hurd/times.c: Fix typo in last change.

	* sysdeps/mach/hurd/setpriority.c [POLICY_TIMESHARE_BASE_COUNT]:
	Use task_policy in place of task_priority.

	* sysdeps/generic/bits/mman.h
	(MS_ASYNC, MS_SYNC, MS_INVALIDATE): New macros.
	* sysdeps/mach/msync.c: New file.

	* sysdeps/mach/powerpc/syscall.S: New file.

	* mach/msg.c [MACH_MSG_OVERWRITE]
	(__mach_msg_trap, __mach_msg_overwrite): New functions.
	* mach/Versions (libc: GLIBC_2.0): Add mach_msg_overwrite and __ name.

	* sysdeps/mach/configure.in: Check for clock.defs to put into
	mach_interface_list.
	* sysdeps/mach/configure: Regenerated.

	* mach/Makefile (mach-machine): New variable, set from $(base-machine).
	($(objpfx)mach-syscalls.mk): Use it in place of $(base-machine).
	($(mach-syscalls:%=$(objpfx)%.S) static pattern rule):
	Use <mach/machine/syscall_sw.h> instead of <sysdep.h>.
	(mach-shortcuts): Add device_read_overwrite_request,
	device_read_overwrite, vm_read_overwrite, thread_switch.

	* configure.in (base_machine): Set to $machine by default.
	* configure: Regenerated.

1 files changed, 74 insertions, 11 deletions

diff --git a/mach/msg.c b/mach/msg.c
index ece110868d..bccad7fd26 100644
--- a/mach/msg.c
+++ b/mach/msg.c
@@ -1,31 +1,94 @@
-/* 
+/*
  * Mach Operating System
  * Copyright (c) 1991,1990,1989, 1995 Carnegie Mellon University
  * All Rights Reserved.
- * 
+ *
  * Permission to use, copy, modify and distribute this software and its
  * documentation is hereby granted, provided that both the copyright
  * notice and this permission notice appear in all copies of the
  * software, derivative works or modified versions, and any portions
  * thereof, and that both notices appear in supporting documentation.
- * 
+ *
  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- * 
+ *
  * Carnegie Mellon requests users of this software to return to
- * 
+ *
  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  *  School of Computer Science
  *  Carnegie Mellon University
  *  Pittsburgh PA 15213-3890
- * 
+ *
  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */
 #include <mach/port.h>
 #include <mach/message.h>
 
+#ifdef MACH_MSG_OVERWRITE
+/* In variants with this feature, the actual system call is
+   __mach_msg_overwrite_trap.  */
+mach_msg_return_t
+__mach_msg_trap (mach_msg_header_t *msg,
+		 mach_msg_option_t option,
+		 mach_msg_size_t send_size,
+		 mach_msg_size_t rcv_size,
+		 mach_port_t rcv_name,
+		 mach_msg_timeout_t timeout,
+		 mach_port_t notify)
+{
+  return __mach_msg_overwrite_trap (msg, option, send_size,
+				    rcv_size, rcv_name, timeout, notify,
+				    MACH_MSG_NULL, 0);
+}
+weak_alias (__mach_msg_trap, mach_msg_trap)
+
+/* See comments below in __mach_msg.  */
+mach_msg_return_t
+__mach_msg_overwrite (mach_msg_header_t *msg,
+		      mach_msg_option_t option,
+		      mach_msg_size_t send_size,
+		      mach_msg_size_t rcv_size,
+		      mach_port_t rcv_name,
+		      mach_msg_timeout_t timeout,
+		      mach_port_t notify,
+		      mach_msg_header_t *rcv_msg,
+		      mach_msg_size_t rcv_msg_size)
+
+{
+  mach_msg_return_t ret;
+
+  /* Consider the following cases:
+     1. Errors in pseudo-receive (eg, MACH_SEND_INTERRUPTED
+     plus special bits).
+     2. Use of MACH_SEND_INTERRUPT/MACH_RCV_INTERRUPT options.
+     3. RPC calls with interruptions in one/both halves.
+  */
+
+  ret = __mach_msg_overwrite_trap (msg, option, send_size,
+				   rcv_size, rcv_name, timeout, notify,
+				   rcv_msg, rcv_msg_size);
+  if (ret == MACH_MSG_SUCCESS)
+    return MACH_MSG_SUCCESS;
+
+  if (!(option & MACH_SEND_INTERRUPT))
+    while (ret == MACH_SEND_INTERRUPTED)
+      ret = __mach_msg_overwrite_trap (msg, option, send_size,
+				       rcv_size, rcv_name, timeout, notify,
+				       rcv_msg, rcv_msg_size);
+
+  if (!(option & MACH_RCV_INTERRUPT))
+    while (ret == MACH_RCV_INTERRUPTED)
+      ret = __mach_msg_overwrite_trap (msg, option & ~MACH_SEND_MSG,
+				       0, rcv_size, rcv_name, timeout, notify,
+				       rcv_msg, rcv_msg_size);
+
+  return ret;
+}
+weak_alias (__mach_msg_overwrite, mach_msg_overwrite)
+#endif
+
 mach_msg_return_t
 __mach_msg (mach_msg_header_t *msg,
 	    mach_msg_option_t option,
@@ -36,29 +99,29 @@ __mach_msg (mach_msg_header_t *msg,
 	    mach_port_t notify)
 {
   mach_msg_return_t ret;
-  
+
   /* Consider the following cases:
      1. Errors in pseudo-receive (eg, MACH_SEND_INTERRUPTED
      plus special bits).
      2. Use of MACH_SEND_INTERRUPT/MACH_RCV_INTERRUPT options.
      3. RPC calls with interruptions in one/both halves.
      */
-  
+
   ret = __mach_msg_trap (msg, option, send_size,
 			 rcv_size, rcv_name, timeout, notify);
   if (ret == MACH_MSG_SUCCESS)
     return MACH_MSG_SUCCESS;
-  
+
   if (!(option & MACH_SEND_INTERRUPT))
     while (ret == MACH_SEND_INTERRUPTED)
       ret = __mach_msg_trap (msg, option, send_size,
 			     rcv_size, rcv_name, timeout, notify);
-  
+
   if (!(option & MACH_RCV_INTERRUPT))
     while (ret == MACH_RCV_INTERRUPTED)
       ret = __mach_msg_trap (msg, option & ~MACH_SEND_MSG,
 			     0, rcv_size, rcv_name, timeout, notify);
-  
+
   return ret;
 }
 weak_alias (__mach_msg, mach_msg)