pin ctxt in xc_domain_getfullinfo

[Kip Macy <kip.macy@gmail.com>]

# This is a BitKeeper generated diff -Nru style patch.
#
# ChangeSet
#   2005/04/22 13:45:41-07:00 kmacy@curly.lab.netapp.com 
#   mlock ctxt in xc_domain_getfullinfo
#   this is the most general solution to the recent problem seen in xc_ptrace
#   Signed-off-by: Kip Macy <kmacy@fsmware.com>
# 
# tools/libxc/xc_domain.c
#   2005/04/22 13:45:38-07:00 kmacy@curly.lab.netapp.com +7 -0
#   mlock ctxt in xc_domain_getfullinfo
# 
diff -Nru a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
--- a/tools/libxc/xc_domain.c   2005-04-21 13:52:32 -07:00
+++ b/tools/libxc/xc_domain.c   2005-04-21 13:52:32 -07:00
@@ -134,7 +134,14 @@
     op.u.getdomaininfo.exec_domain = (u16)vcpu;
     op.u.getdomaininfo.ctxt = ctxt;
 
+    if ( ctxt ) 
+       if ( mlock(ctxt, sizeof(*ctxt)) != 0 )
+           return -1;
+
     rc = do_dom0_op(xc_handle, &op);
+    
+    if ( ctxt )
+       munlock(ctxt, sizeof(*ctxt));
 
     if ( info )
         memcpy(info, &op.u.getdomaininfo, sizeof(*info));