X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_shadow_paging.c;h=55920edadd4fa549226565ce24914a88c14fbbe3;hb=746934f539c53c6fc687890c02ebf886c6873342;hp=702b6f01a25c3f4dec2e461680c4588ee90d10f4;hpb=11b5cccde17af54f3998c38952e0eeedf85ced0a;p=palacios.git

diff --git a/palacios/src/palacios/vmm_shadow_paging.c b/palacios/src/palacios/vmm_shadow_paging.c
index 702b6f0..55920ed 100644
--- a/palacios/src/palacios/vmm_shadow_paging.c
+++ b/palacios/src/palacios/vmm_shadow_paging.c
@@ -26,6 +26,8 @@
 #include <palacios/vmm_decoder.h>
 #include <palacios/vmm_ctrl_regs.h>
 
+#include <palacios/vmm_hashtable.h>
+
 #ifndef DEBUG_SHADOW_PAGING
 #undef PrintDebug
 #define PrintDebug(fmt, args...)
@@ -37,17 +39,37 @@
  ***/
 
 
+struct guest_table {
+  addr_t cr3;
+  struct list_head link;
+};
+
+
+struct backptr {
+  addr_t ptr;
+  struct list_head link;
+};
+
+
+struct shadow_page_data {
+  addr_t ptr;
+  addr_t guest_addr; 
+
+  struct list_head backptrs;
+  struct list_head guest_tables;
+};
 
 
 
-DEFINE_HASHTABLE_INSERT(add_cr3_to_cache, addr_t, struct hashtable *);
-DEFINE_HASHTABLE_SEARCH(find_cr3_in_cache, addr_t, struct hashtable *);
-DEFINE_HASHTABLE_REMOVE(del_cr3_from_cache, addr_t, struct hashtable *, 0);
+
+//DEFINE_HASHTABLE_INSERT(add_cr3_to_cache, addr_t, struct hashtable *);
+//DEFINE_HASHTABLE_SEARCH(find_cr3_in_cache, addr_t, struct hashtable *);
+//DEFINE_HASHTABLE_REMOVE(del_cr3_from_cache, addr_t, struct hashtable *, 0);
 
 
 DEFINE_HASHTABLE_INSERT(add_pte_map, addr_t, addr_t);
 DEFINE_HASHTABLE_SEARCH(find_pte_map, addr_t, addr_t);
-DEFINE_HASHTABLE_REMOVE(del_pte_map, addr_t, addr_t, 0);
+//DEFINE_HASHTABLE_REMOVE(del_pte_map, addr_t, addr_t, 0);
 
 
 
@@ -99,56 +121,6 @@ int v3_init_shadow_page_state(struct guest_info * info) {
 
 
 
-/*
- For now we'll do something a little more lightweight
-int cache_page_tables32(struct guest_info * info, addr_t pde) {
-  struct shadow_page_state * state = &(info->shdw_pg_state);
-  addr_t pde_host_addr;
-  pde32_t * tmp_pde;
-  struct hashtable * pte_cache = NULL;
-  int i = 0;
-
-
-  pte_cache = (struct hashtable *)find_cr3_in_cache(state->cr3_cache, pde);
-  if (pte_cache != NULL) {
-    PrintError("CR3 already present in cache\n");
-    state->current_ptes = pte_cache;
-    return 1;
-  } else {
-    PrintError("Creating new CR3 cache entry\n");
-    pte_cache = create_hashtable(0, &pte_hash_fn, &pte_equals);
-    state->current_ptes = pte_cache;
-    add_cr3_to_cache(state->cr3_cache, pde, pte_cache);
-  }
-
-  if (guest_pa_to_host_va(info, pde, &pde_host_addr) == -1) {
-    PrintError("Could not lookup host address of guest PDE\n");
-    return -1;
-  }
-
-  tmp_pde = (pde32_t *)pde_host_addr;
-
-  add_pte_map(pte_cache, pde, pde_host_addr);
-
-
-  for (i = 0; i < MAX_PDE32_ENTRIES; i++) {
-    if ((tmp_pde[i].present) && (tmp_pde[i].large_page == 0)) {
-      addr_t pte_host_addr;
-
-      if (guest_pa_to_host_va(info, (addr_t)(PDE32_T_ADDR(tmp_pde[i])), &pte_host_addr) == -1) {
-	PrintError("Could not lookup host address of guest PDE\n");
-	return -1;
-      }
-
-      add_pte_map(pte_cache, (addr_t)(PDE32_T_ADDR(tmp_pde[i])), pte_host_addr); 
-    }
-  }
-
-
-  return 0;
-}
-*/
-
 
 int v3_cache_page_tables(struct guest_info * info, addr_t cr3) {
   switch(v3_get_cpu_mode(info)) {
@@ -278,8 +250,9 @@ static int activate_shadow_pt_32pae(struct guest_info * info) {
   return -1;
 }
 
-static void activate_shadow_pt_64_cb(page_type_t type, addr_t page_ptr, addr_t page_pa, void * private_data) {
-  PrintDebug("CB: Page: %p, Type: %s\n", (void *)page_pa, v3_page_type_to_str(type));
+static int activate_shadow_pt_64_cb(page_type_t type, addr_t vaddr, addr_t page_ptr, addr_t page_pa, void * private_data) {
+  PrintDebug("CB: Page: %p->%p (host_ptr=%p), Type: %s\n", (void *)vaddr, (void *)page_pa, (void *)page_ptr, v3_page_type_to_str(type));
+  return 0;
 }
 
 
@@ -364,7 +337,8 @@ int v3_handle_shadow_pagefault(struct guest_info * info, addr_t fault_addr, pf_e
     // If paging is not turned on we need to handle the special cases
 
 #ifdef DEBUG_SHADOW_PAGING
-    PrintPageTree(info->cpu_mode, fault_addr, info->ctrl_regs.cr3);
+    PrintHostPageTree(info->cpu_mode, fault_addr, info->ctrl_regs.cr3);
+    PrintGuestPageTree(info, fault_addr, info->shdw_pg_state.guest_cr3);
 #endif
 
     return handle_special_page_fault(info, fault_addr, fault_addr, error_code);
@@ -400,6 +374,10 @@ addr_t v3_create_new_shadow_pt() {
 
 
 static void inject_guest_pf(struct guest_info * info, addr_t fault_addr, pf_error_t error_code) {
+  if (info->enable_profiler) {
+    info->profiler.guest_pf_cnt++;
+  }
+
   info->ctrl_regs.cr2 = fault_addr;
   v3_raise_exception_with_error(info, PF_EXCEPTION, *(uint_t *)&error_code);
 }
@@ -559,7 +537,20 @@ static int handle_shadow_pagefault_32(struct guest_info * info, addr_t fault_add
       shadow_pde->pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(shadow_pt));
       
       if (guest_pde->large_page == 0) {
+	pte32_t * guest_pt = NULL;
 	shadow_pde->writable = guest_pde->writable;
+
+	if (guest_pa_to_host_va(info, BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr), (addr_t*)&guest_pt) == -1) {
+	  // Machine check the guest
+	  PrintDebug("Invalid Guest PTE Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr));
+	  v3_raise_exception(info, MC_EXCEPTION);
+	  return 0;
+	}
+
+	if (handle_shadow_pte32_fault(info, fault_addr, error_code, shadow_pt, guest_pt)  == -1) {
+	  PrintError("Error handling Page fault caused by PTE\n");
+	  return -1;
+	}
       } else {
 	// ??  What if guest pde is dirty a this point?
 	((pde32_4MB_t *)guest_pde)->dirty = 0;
@@ -575,6 +566,7 @@ static int handle_shadow_pagefault_32(struct guest_info * info, addr_t fault_add
 
       if (guest_pde->large_page == 0) {
 	pte32_t * guest_pt = NULL;
+
 	if (guest_pa_to_host_va(info, BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr), (addr_t*)&guest_pt) == -1) {
 	  // Machine check the guest
 	  PrintDebug("Invalid Guest PTE Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr));
@@ -626,9 +618,9 @@ static int handle_shadow_pagefault_32(struct guest_info * info, addr_t fault_add
       PrintDebug("Manual Says to inject page fault into guest\n");
 #ifdef DEBUG_SHADOW_PAGING
       PrintDebug("Guest PDE: (access=%d)\n\t", guest_pde_access);
-      PrintPDE32(fault_addr, guest_pde);
+      PrintPTEntry(PAGE_PD32, fault_addr, guest_pde);
       PrintDebug("Shadow PDE: (access=%d)\n\t", shadow_pde_access);
-      PrintPDE32(fault_addr, shadow_pde);
+      PrintPTEntry(PAGE_PD32, fault_addr, shadow_pde);
 #endif
 
       return 0; 
@@ -649,7 +641,19 @@ static int handle_large_pagefault_32(struct guest_info * info,
 {
   pt_access_status_t shadow_pte_access = v3_can_access_pte32(shadow_pt, fault_addr, error_code);
   pte32_t * shadow_pte = (pte32_t *)&(shadow_pt[PTE32_INDEX(fault_addr)]);
-  
+  addr_t guest_fault_pa = BASE_TO_PAGE_ADDR_4MB(large_guest_pde->page_base_addr) + PAGE_OFFSET_4MB(fault_addr);  
+
+  struct v3_shadow_region * shdw_reg = v3_get_shadow_region(info, guest_fault_pa);
+
+ 
+  if ((shdw_reg == NULL) || 
+      (shdw_reg->host_type == SHDW_REGION_INVALID)) {
+    // Inject a machine check in the guest
+    PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_fault_pa);
+    v3_raise_exception(info, MC_EXCEPTION);
+    return -1;
+  }
+
   if (shadow_pte_access == PT_ACCESS_OK) {
     // Inconsistent state...
     // Guest Re-Entry will flush tables and everything should now workd
@@ -660,20 +664,11 @@ static int handle_large_pagefault_32(struct guest_info * info,
   
   if (shadow_pte_access == PT_ACCESS_NOT_PRESENT) {
     // Get the guest physical address of the fault
-    addr_t guest_fault_pa = BASE_TO_PAGE_ADDR_4MB(large_guest_pde->page_base_addr) + PAGE_OFFSET_4MB(fault_addr);
-    host_region_type_t host_page_type = get_shadow_addr_type(info, guest_fault_pa);
- 
-
-    if (host_page_type == HOST_REGION_INVALID) {
-      // Inject a machine check in the guest
-      PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_fault_pa);
-      v3_raise_exception(info, MC_EXCEPTION);
-      return 0;
-    }
 
-    if (host_page_type == HOST_REGION_PHYSICAL_MEMORY) {
+    if ((shdw_reg->host_type == SHDW_REGION_ALLOCATED) || 
+	(shdw_reg->host_type == SHDW_REGION_WRITE_HOOK)) {
       struct shadow_page_state * state = &(info->shdw_pg_state);
-      addr_t shadow_pa = get_shadow_addr(info, guest_fault_pa);
+      addr_t shadow_pa = v3_get_shadow_addr(shdw_reg, guest_fault_pa);
 
       shadow_pte->page_base_addr = PAGE_BASE_ADDR(shadow_pa);
 
@@ -691,11 +686,12 @@ static int handle_large_pagefault_32(struct guest_info * info,
 	PrintDebug("Marking page as Guest Page Table (large page)\n");
 	shadow_pte->vmm_info = PT32_GUEST_PT;
 	shadow_pte->writable = 0;
+      } else if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
+	shadow_pte->writable = 0;
       } else {
 	shadow_pte->writable = 1;
       }
 
-
       //set according to VMM policy
       shadow_pte->write_through = 0;
       shadow_pte->cache_disable = 0;
@@ -704,18 +700,27 @@ static int handle_large_pagefault_32(struct guest_info * info,
       
     } else {
       // Handle hooked pages as well as other special pages
-      if (handle_special_page_fault(info, fault_addr, guest_fault_pa, error_code) == -1) {
+      //      if (handle_special_page_fault(info, fault_addr, guest_fault_pa, error_code) == -1) {
+
+      if (v3_handle_mem_full_hook(info, fault_addr, guest_fault_pa, shdw_reg, error_code) == -1) {
 	PrintError("Special Page Fault handler returned error for address: %p\n", (void *)fault_addr);
 	return -1;
       }
     }
-  } else if ((shadow_pte_access == PT_ACCESS_WRITE_ERROR) && 
-	     (shadow_pte->vmm_info == PT32_GUEST_PT)) {
+  } else if (shadow_pte_access == PT_ACCESS_WRITE_ERROR) {
+
+    if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
 
-    struct shadow_page_state * state = &(info->shdw_pg_state);
-    PrintDebug("Write operation on Guest PAge Table Page (large page)\n");
-    state->cached_cr3 = 0;
-    shadow_pte->writable = 1;
+      if (v3_handle_mem_wr_hook(info, fault_addr, guest_fault_pa, shdw_reg, error_code) == -1) {
+	PrintError("Special Page Fault handler returned error for address: %p\n", (void *)fault_addr);
+	return -1;
+      }
+    } else if (shadow_pte->vmm_info == PT32_GUEST_PT) {
+      struct shadow_page_state * state = &(info->shdw_pg_state);
+      PrintDebug("Write operation on Guest PAge Table Page (large page)\n");
+      state->cached_cr3 = 0;
+      shadow_pte->writable = 1;
+    }
 
   } else {
     PrintError("Error in large page fault handler...\n");
@@ -743,7 +748,17 @@ static int handle_shadow_pte32_fault(struct guest_info * info,
   pt_access_status_t shadow_pte_access;
   pte32_t * guest_pte = (pte32_t *)&(guest_pt[PTE32_INDEX(fault_addr)]);;
   pte32_t * shadow_pte = (pte32_t *)&(shadow_pt[PTE32_INDEX(fault_addr)]);
+  addr_t guest_pa = BASE_TO_PAGE_ADDR((addr_t)(guest_pte->page_base_addr)) +  PAGE_OFFSET(fault_addr);
+
+  struct v3_shadow_region * shdw_reg =  v3_get_shadow_region(info, guest_pa);
 
+  if ((shdw_reg == NULL) || 
+      (shdw_reg->host_type == SHDW_REGION_INVALID)) {
+    // Inject a machine check in the guest
+    PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_pa);
+    v3_raise_exception(info, MC_EXCEPTION);
+    return 0;
+  }
 
   // Check the guest page permissions
   guest_pte_access = v3_can_access_pte32(guest_pt, fault_addr, error_code);
@@ -753,9 +768,9 @@ static int handle_shadow_pte32_fault(struct guest_info * info,
   
 #ifdef DEBUG_SHADOW_PAGING
   PrintDebug("Guest PTE: (access=%d)\n\t", guest_pte_access);
-  PrintPTE32(fault_addr, guest_pte);
+  PrintPTEntry(PAGE_PT32, fault_addr, guest_pte);
   PrintDebug("Shadow PTE: (access=%d)\n\t", shadow_pte_access);
-  PrintPTE32(fault_addr, shadow_pte);
+  PrintPTEntry(PAGE_PT32, fault_addr, shadow_pte);
 #endif
   
   /* Was the page fault caused by the Guest's page tables? */
@@ -776,26 +791,13 @@ static int handle_shadow_pte32_fault(struct guest_info * info,
 
 
   if (shadow_pte_access == PT_ACCESS_NOT_PRESENT) {
-
-    addr_t guest_pa = BASE_TO_PAGE_ADDR((addr_t)(guest_pte->page_base_addr)) +  PAGE_OFFSET(fault_addr);
-
     // Page Table Entry Not Present
     PrintDebug("guest_pa =%p\n", (void *)guest_pa);
 
-    host_region_type_t host_page_type = get_shadow_addr_type(info, guest_pa);
-
-    if (host_page_type == HOST_REGION_INVALID) {
-      // Inject a machine check in the guest
-      PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_pa);
-      v3_raise_exception(info, MC_EXCEPTION);
-      return 0;
-    }
-
-    // else...
-
-    if (host_page_type == HOST_REGION_PHYSICAL_MEMORY) {
+    if ((shdw_reg->host_type == SHDW_REGION_ALLOCATED) ||
+	(shdw_reg->host_type == SHDW_REGION_WRITE_HOOK)) {
       struct shadow_page_state * state = &(info->shdw_pg_state);
-      addr_t shadow_pa = get_shadow_addr(info, guest_pa);
+      addr_t shadow_pa = v3_get_shadow_addr(shdw_reg, guest_pa);
       
       shadow_pte->page_base_addr = PAGE_BASE_ADDR(shadow_pa);
       
@@ -816,7 +818,9 @@ static int handle_shadow_pte32_fault(struct guest_info * info,
 	shadow_pte->vmm_info = PT32_GUEST_PT;
       }
 
-      if (guest_pte->dirty == 1) {
+      if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
+	shadow_pte->writable = 0;
+      } else if (guest_pte->dirty == 1) {
 	shadow_pte->writable = guest_pte->writable;
       } else if ((guest_pte->dirty == 0) && (error_code.write == 1)) {
 	shadow_pte->writable = guest_pte->writable;
@@ -833,29 +837,37 @@ static int handle_shadow_pte32_fault(struct guest_info * info,
 	shadow_pte->writable = 0;
       }
 
-
-
     } else {
       // Page fault handled by hook functions
-      if (handle_special_page_fault(info, fault_addr, guest_pa, error_code) == -1) {
+
+      if (v3_handle_mem_full_hook(info, fault_addr, guest_pa, shdw_reg, error_code) == -1) {
 	PrintError("Special Page fault handler returned error for address: %p\n",  (void *)fault_addr);
 	return -1;
       }
     }
-
+    /*
   } else if ((shadow_pte_access == PT_ACCESS_WRITE_ERROR) &&
 	     (guest_pte->dirty == 0)) {
-
-    PrintDebug("Shadow PTE Write Error\n");
+    */
+  } else if (shadow_pte_access == PT_ACCESS_WRITE_ERROR) {
     guest_pte->dirty = 1;
-    shadow_pte->writable = guest_pte->writable;
+
+    if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
+      if (v3_handle_mem_wr_hook(info, fault_addr, guest_pa, shdw_reg, error_code) == -1) {
+	PrintError("Special Page fault handler returned error for address: %p\n",  (void *)fault_addr);
+	return -1;
+      }
+    } else {
+      PrintDebug("Shadow PTE Write Error\n");
+      shadow_pte->writable = guest_pte->writable;
+    }
 
     if (shadow_pte->vmm_info == PT32_GUEST_PT) {
       struct shadow_page_state * state = &(info->shdw_pg_state);
       PrintDebug("Write operation on Guest PAge Table Page\n");
       state->cached_cr3 = 0;
     }
-    
+
     return 0;
 
   } else {
@@ -955,7 +967,7 @@ int v3_handle_shadow_invlpg(struct guest_info * info)
       
 #ifdef DEBUG_SHADOW_PAGING
       PrintDebug("Setting not present\n");
-      PrintPTE32(first_operand, shadow_pte );
+      PrintPTEntry(PAGE_PT32, first_operand, shadow_pte);
 #endif
       
       shadow_pte->present = 0;
@@ -967,133 +979,3 @@ int v3_handle_shadow_invlpg(struct guest_info * info)
 }
 
 
-/*
-
-
-static int create_pd32_nonaligned_4MB_page(struct guest_info * info, pte32_t * pt, addr_t guest_addr, pde32_4MB_t * large_shadow_pde) {
-  uint_t i = 0;
-  pte32_t * pte_cursor;
-  addr_t guest_pa = 0;
-
-  for (i = 0; i < 1024; i++) {
-    guest_pa = guest_addr + (PAGE_SIZE * i);
-    host_region_type_t host_page_type = get_shadow_addr_type(info, guest_pa);
-    
-    pte_cursor = &(pt[i]);
-
-    if (host_page_type == HOST_REGION_INVALID) {
-      // Currently we don't support this, but in theory we could
-      PrintError("Invalid Host Memory Type\n");
-      return -1;
-    } else if (host_page_type == HOST_REGION_PHYSICAL_MEMORY) {
-      addr_t shadow_pa = get_shadow_addr(info, guest_pa);
-
-
-      pte_cursor->page_base_addr = PT32_BASE_ADDR(shadow_pa);
-      pte_cursor->present = 1;
-      pte_cursor->writable = large_shadow_pde->writable;
-      pte_cursor->user_page = large_shadow_pde->user_page;
-      pte_cursor->write_through = 0;  
-      pte_cursor->cache_disable = 0;
-      pte_cursor->global_page = 0;
-
-    } else {
-      PrintError("Unsupported Host Memory Type\n");
-      return -1;
-    }
-  }
-  return 0;
-}
-
-
-static int handle_large_pagefault32(struct guest_info * info, 
-				    pde32_t * guest_pde, pde32_t * shadow_pde, 
-				    addr_t fault_addr, pf_error_t error_code ) {
-  struct shadow_region * mem_reg;
-  pde32_4MB_t * large_guest_pde = (pde32_4MB_t *)guest_pde;
-  pde32_4MB_t * large_shadow_pde = (pde32_4MB_t *)shadow_pde;
-  host_region_type_t host_page_type;
-  addr_t guest_start_addr = PDE32_4MB_T_ADDR(*large_guest_pde);
-  //    addr_t guest_end_addr = guest_start_addr + PAGE_SIZE_4MB; // start address + 4MB
-  
-  
-  // Check that the Guest PDE entry points to valid memory
-  // else Machine Check the guest
-  PrintDebug("Large Page: Page Base Addr=%x\n", guest_start_addr);
-  
-  host_page_type = get_shadow_addr_type(info, guest_start_addr);
-  
-  if (host_page_type == HOST_REGION_INVALID) {
-    PrintError("Invalid guest address in large page (0x%x)\n", guest_start_addr);
-    v3_raise_exception(info, MC_EXCEPTION);
-    return -1;
-  }
-  
-  // else...
-
-  if (host_page_type == HOST_REGION_PHYSICAL_MEMORY) {
-
-    addr_t host_start_addr = 0;
-    addr_t region_end_addr = 0;
-    
-    // Check for a large enough region in host memory
-    mem_reg = get_shadow_region_by_addr(&(info->mem_map), guest_start_addr);
-    PrintDebug("Host region: host_addr=%x (guest_start=%x, end=%x)\n", 
-	       mem_reg->host_addr, mem_reg->guest_start, mem_reg->guest_end);
-    host_start_addr = mem_reg->host_addr + (guest_start_addr - mem_reg->guest_start);
-    region_end_addr = mem_reg->host_addr + (mem_reg->guest_end - mem_reg->guest_start);
-    
-    PrintDebug("Host Start Addr=%x; Region End Addr=%x\n", host_start_addr, region_end_addr);
-    
-    
-    //4f
-    if (large_guest_pde->dirty == 1) { // dirty
-      large_shadow_pde->writable = guest_pde->writable;
-    } else if (error_code.write == 1) { // not dirty, access is write
-      large_shadow_pde->writable = guest_pde->writable;
-      large_guest_pde->dirty = 1;
-    } else { // not dirty, access is read
-      large_shadow_pde->writable = 0;
-    }
-    
-    
-    // Check if the region is at least an additional 4MB
-    
-    
-    //4b.
-    if ((PD32_4MB_PAGE_OFFSET(host_start_addr) == 0) && 
-	(region_end_addr >= host_start_addr + PAGE_SIZE_4MB)) { 	// if 4MB boundary
-      large_shadow_pde->page_base_addr = PD32_4MB_BASE_ADDR(host_start_addr);
-    } else { 	  // else generate 4k pages
-      pte32_t * shadow_pt = NULL;
-      PrintDebug("Handling non aligned large page\n");
-      
-      shadow_pde->large_page = 0;
-      
-      shadow_pt = create_new_shadow_pt32();
-
-      if (create_pd32_nonaligned_4MB_page(info, shadow_pt, guest_start_addr, large_shadow_pde) == -1) {
-	PrintError("Non Aligned Large Page Error\n");
-	V3_Free(shadow_pt);
-	return -1;
-      }
-      
-      
-#ifdef DEBUG_SHADOW_PAGING
-      PrintDebug("non-aligned Shadow PT\n");
-      PrintPT32(PT32_PAGE_ADDR(fault_addr), shadow_pt);	  
-#endif
-      shadow_pde->pt_base_addr = PD32_BASE_ADDR(shadow_pt);
-    }
-    
-  } else {
-    // Handle hooked pages as well as other special pages
-    if (handle_special_page_fault(info, fault_addr, guest_start_addr, error_code) == -1) {
-      PrintError("Special Page Fault handler returned error for address: %x\n", fault_addr);
-      return -1;
-    }
-  }
-
-  return 0;
-}
-*/