PERFORCE change 103168 for review

[Roman Divacky]

http://perforce.freebsd.org/chv.cgi?CH=103168

Change 103168 by rdivacky at rdivacky_witten on 2006/08/04 13:56:07

	Check for the uaddr being in userspace. Otherwise return EFAULT via our fault handler.

Affected files ...

.. //depot/projects/soc2006/rdivacky_linuxolator/i386/i386/support.s#3 edit

Differences ...

==== //depot/projects/soc2006/rdivacky_linuxolator/i386/i386/support.s#3 (text+ko) ====

@@ -1553,6 +1553,8 @@
 	movl	$futex_fault, PCB_ONFAULT(%eax)
 	movl	4(%esp), %eax
 	movl	8(%esp), %edx
+	cmpl    $VM_MAXUSER_ADDRESS,%edx
+	ja     	futex_fault
 
 	xchgl	%eax, (%edx)
 	movl	0xc(%esp), %edx
@@ -1570,6 +1572,8 @@
 	movl	$futex_fault, PCB_ONFAULT(%eax)
 	movl	4(%esp), %eax
 	movl	8(%esp), %edx
+	cmpl    $VM_MAXUSER_ADDRESS,%edx
+	ja     	futex_fault
 
 	MPLOCKED xaddl	%eax, (%edx)
 	movl	0xc(%esp), %edx
@@ -1587,6 +1591,8 @@
 	movl	$futex_fault, PCB_ONFAULT(%eax)
 	movl	4(%esp), %eax
 	movl	8(%esp), %edx
+	cmpl    $VM_MAXUSER_ADDRESS,%edx
+	ja     	futex_fault
 
 	orl 	%eax, (%edx)
 	movl	0xc(%esp), %edx
@@ -1604,6 +1610,8 @@
 	movl	$futex_fault, PCB_ONFAULT(%eax)
 	movl	4(%esp), %eax
 	movl	8(%esp), %edx
+	cmpl    $VM_MAXUSER_ADDRESS,%edx
+	ja     	futex_fault
 
 	notl	(%edx)
 	andl 	%eax, (%edx)
@@ -1622,6 +1630,8 @@
 	movl	$futex_fault, PCB_ONFAULT(%eax)
 	movl	4(%esp), %eax
 	movl	8(%esp), %edx
+	cmpl    $VM_MAXUSER_ADDRESS,%edx
+	ja     	futex_fault
 
 	xorl 	%eax, (%edx)
 	movl	0xc(%esp), %edx