From: Jack Lange <jarusl@cs.northwestern.edu>
Date: Fri, 21 Jan 2011 23:46:10 +0000 (-0600)
Subject: solved the case of the missing console output
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=commitdiff_plain;h=ac7e7ba347053dd19a38a32b645c9b07c1962e97;p=palacios.git

solved the case of the missing console output
---

diff --git a/palacios/src/palacios/vmm_ctrl_regs.c b/palacios/src/palacios/vmm_ctrl_regs.c
index afecc74..7d6e381 100644
--- a/palacios/src/palacios/vmm_ctrl_regs.c
+++ b/palacios/src/palacios/vmm_ctrl_regs.c
@@ -108,13 +108,18 @@ static int handle_mov_to_cr0(struct guest_info * info, struct x86_instr * dec_in
     *guest_cr0 = *new_cr0;
     
     // This value must always be set to 1 
-    guest_cr0->et = 1;    
+    guest_cr0->et = 1;
     
     // Set the shadow register to catch non-virtualized flags
     *shadow_cr0 = *guest_cr0;
     
     // Paging is always enabled
-    shadow_cr0->pg = 1;  
+    shadow_cr0->pg = 1;
+
+    if (guest_cr0->pg == 0) {
+	// If paging is not enabled by the guest, then we always enable write-protect to catch memory hooks
+	shadow_cr0->wp = 1;
+    }
     
     // Was there a paging transition
     // Meaning we need to change the page tables