From: Jack Lange <jarusl@cs.northwestern.edu>
Date: Thu, 23 Apr 2009 00:59:17 +0000 (-0500)
Subject: added memory unhooking function
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=commitdiff_plain;h=70d3ac1e7be22e42fbf8f778367e9bf6d32e5b7f

added memory unhooking function
---

diff --git a/palacios/include/palacios/vmm_mem.h b/palacios/include/palacios/vmm_mem.h
index f87c8d0..927577e 100644
--- a/palacios/include/palacios/vmm_mem.h
+++ b/palacios/include/palacios/vmm_mem.h
@@ -99,12 +99,14 @@ int v3_hook_write_mem(struct guest_info * info, addr_t guest_addr_start, addr_t
 
 
 
-
+int v3_unhook_mem(struct guest_info * info, addr_t guest_addr_start);
 
 
 void v3_delete_shadow_region(struct guest_info * info, struct v3_shadow_region * reg);
 
 
+
+
 struct v3_shadow_region * v3_get_shadow_region(struct guest_info * info, addr_t guest_addr);
 addr_t v3_get_shadow_addr(struct v3_shadow_region * reg, addr_t guest_addr);
 
diff --git a/palacios/src/devices/pci.c b/palacios/src/devices/pci.c
index 6b5472d..602f47c 100644
--- a/palacios/src/devices/pci.c
+++ b/palacios/src/devices/pci.c
@@ -566,7 +566,7 @@ static void init_pci_busses(struct pci_internal * pci_state) {
 
 
 static int pci_init_device(struct vm_device * dev) {
-    struct pci_internal * pci_state = (struct pci_internal *)dev->private_data;;
+    struct pci_internal * pci_state = (struct pci_internal *)dev->private_data;
     int i = 0;
     
     PrintDebug("pci: init_device\n");
diff --git a/palacios/src/palacios/vmm_mem.c b/palacios/src/palacios/vmm_mem.c
index 659fd27..dc3f1ae 100644
--- a/palacios/src/palacios/vmm_mem.c
+++ b/palacios/src/palacios/vmm_mem.c
@@ -150,6 +150,20 @@ int v3_hook_full_mem(struct guest_info * info, addr_t guest_addr_start, addr_t g
 }
 
 
+// This will unhook the memory hook registered at start address
+// We do not support unhooking subregions
+int v3_unhook_mem(struct guest_info * info, addr_t guest_addr_start) {
+    struct v3_shadow_region * reg = v3_get_shadow_region(info, guest_addr_start);
+
+    if ((reg->host_type != SHDW_REGION_FULL_HOOK) || 
+	(reg->host_type != SHDW_REGION_WRITE_HOOK)) {
+	PrintError("Trying to unhook a non hooked memory region (addr=%p)\n", (void *)guest_addr_start);
+	return -1;
+    }
+
+    return v3_delete_shadow_region(info, reg);
+}
+
 
 
 static inline