From 0572d1659d8b50b4251950474f688513c4a72f8e Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sat, 3 Nov 2018 19:11:47 +0100
Subject: Add vm_object_sync support

* include/mach/vm_sync.h: New file.
* include/mach/mach_types.h: Include <mach/vm_sync.h>
* Makefrag.am (include_mach_HEADERS): Add include/mach/vm_sync.h.
* include/mach/mach_types.defs (vm_sync_t): Add type.
* include/mach/gnumach.defs (vm_object_sync, vm_msync): Add RPCs.
* vm/vm_map.h: Include <mach/vm_sync.h>.
(vm_map_msync): New declaration.
* vm/vm_map.c (vm_map_msync): New function.
* vm/vm_user.c: Include <mach/vm_sync.h> and <kern/mach.server.h>.
(vm_object_sync, vm_msync): New functions.
---
 vm/vm_map.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'vm/vm_map.c')

diff --git a/vm/vm_map.c b/vm/vm_map.c
index 2fd27316..8afa74b3 100644
--- a/vm/vm_map.c
+++ b/vm/vm_map.c
@@ -4868,6 +4868,37 @@ kern_return_t vm_map_machine_attribute(
 	return ret;
 }
 
+/*
+ *	Routine:	vm_map_msync
+ *	Purpose:
+ *		Synchronize out pages of the given map out to their memory
+ *		manager, if any.
+ */
+kern_return_t vm_map_msync(
+	vm_map_t	map,
+	vm_offset_t	address,
+	vm_size_t	size,
+	vm_sync_t	sync_flags)
+{
+	if (map == VM_MAP_NULL)
+		KERN_INVALID_ARGUMENT;
+
+	if (sync_flags & (VM_SYNC_ASYNCHRONOUS | VM_SYNC_SYNCHRONOUS) ==
+			 (VM_SYNC_ASYNCHRONOUS | VM_SYNC_SYNCHRONOUS))
+		KERN_INVALID_ARGUMENT;
+
+	size =	round_page(address + size) - trunc_page(address);
+	address = trunc_page(address);
+
+	if (size == 0)
+		return KERN_SUCCESS;
+
+	/* TODO */
+
+	return KERN_INVALID_ARGUMENT;
+}
+
+
 
 #if	MACH_KDB
 
-- 
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