* 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.

3 files changed, 89 insertions, 17 deletions

diff --git a/mach/Makefile b/mach/Makefile
index 674250c9ad..a4e4c077f7 100644
--- a/mach/Makefile
+++ b/mach/Makefile
@@ -67,6 +67,9 @@ distribute += Machrules syscalls.awk shortcut.awk \
 # Clear any environment	value.
 generated =
 
+# Translate GNU names for CPUs into the names used in Mach header files.
+mach-machine = $(patsubst powerpc,ppc,$(base-machine))
+
 # Define mach-syscalls and sysno-*.
 ifndef no_deps
 ifndef inhibit_mach_syscalls
@@ -80,7 +83,7 @@ $(objpfx)mach-syscalls.mk: syscalls.awk Makefile
 	echo '#include <mach/syscall_sw.h>' | \
 	DEPENDENCIES_OUTPUT='$@-dep $@' \
 	$(CC) $(CFLAGS) $(CPPFLAGS) -E -x c-header - \
-	      -D_MACH_`echo $(base-machine) | tr a-z A-Z`_SYSCALL_SW_H_=1 | \
+	      -D_MACH_`echo $(mach-machine) | tr a-z A-Z`_SYSCALL_SW_H_=1 | \
 	sed -n -e 's/^kernel_trap(\(.*\),\([-0-9]*\),\([0-9]*\))$$/\1 \2 \3/p'\
 	| $(AWK) -f $< > $@-new
 	cat $@-dep >> $@-new; rm -f $@-dep
@@ -93,15 +96,20 @@ ifndef mach-syscalls
 no_deps=t
 else
 $(mach-syscalls:%=$(objpfx)%.S): $(objpfx)%.S: $(objpfx)mach-syscalls.mk
-	(echo '#include <sysdep.h>'; \
+	(echo '#include <mach/machine/syscall_sw.h>'; \
 	 echo 'kernel_trap(__$*,$(sysno-$*),$(nargs-$*))'; \
 	 echo 'weak_alias (__$*, $*)') > $@-new
 	 mv -f $@-new $@
 generated += $(mach-syscalls:=.S)
 endif	# mach-syscalls
 
-# syscall_device_writev_request has no RPC equivalent.
-mach-shortcuts := $(filter-out device_writev_request,\
+# These syscalls that look like RPCs actually have no RPC equivalents.
+mach-shortcuts := $(filter-out device_writev_request \
+			       device_read_overwrite_request \
+			       device_read_overwrite \
+			       vm_read_overwrite \
+			       thread_switch \
+			       ,\
 		  $(patsubst syscall_%,%,$(filter syscall_%,$(mach-syscalls))))
 
 ifndef mach-shortcuts
diff --git a/mach/Versions b/mach/Versions
index 4a7017fe22..18ec511d91 100644
--- a/mach/Versions
+++ b/mach/Versions
@@ -24,7 +24,7 @@ libc {
 %endif
 
     # functions used by RPC stubs
-    __mach_msg;
+    __mach_msg; __mach_msg_overwrite;
     __mig_allocate; __mig_deallocate; __mig_dealloc_reply_port;
     __mig_get_reply_port; __mig_put_reply_port;
     __mig_strncpy;
@@ -40,7 +40,8 @@ libc {
     # m*
     mach_error; mach_error_string; mach_error_type;
     mach_host_self;
-    mach_msg; mach_msg_destroy;
+    mach_msg; mach_msg_overwrite;
+    mach_msg_destroy;
     mach_msg_send; mach_msg_receive;
     mach_msg_server; mach_msg_server_timeout;
     mach_open_devstream;
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)