-/* Northwestern University */
-/* (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> */
+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
#include <palacios/vmm_shadow_paging.h>
static int handle_shadow_pagefault32(struct guest_info * info, addr_t fault_addr, pf_error_t error_code);
-int init_shadow_page_state(struct guest_info * info) {
+int v3_init_shadow_page_state(struct guest_info * info) {
struct shadow_page_state * state = &(info->shdw_pg_state);
- state->guest_mode = PDE32;
- state->shadow_mode = PDE32;
state->guest_cr3 = 0;
state->shadow_cr3 = 0;
+ state->guest_cr0 = 0;
+
+
state->cr3_cache = create_hashtable(0, &cr3_hash_fn, &cr3_equals);
}
*/
-int cache_page_tables32(struct guest_info * info, addr_t pde) {
+
+int v3_cache_page_tables(struct guest_info * info, addr_t cr3) {
+ switch(v3_get_cpu_mode(info)) {
+ case PROTECTED:
+ return v3_cache_page_tables32(info, (addr_t)V3_PAddr((void *)CR3_TO_PDE32(cr3)));
+ default:
+ return -1;
+ }
+}
+
+int v3_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;
pte_cache = create_hashtable(0, &pte_hash_fn, &pte_equals);
state->cached_ptes = pte_cache;
- if (guest_pa_to_host_pa(info, pde, &pde_host_addr) == -1) {
+ if (guest_pa_to_host_va(info, pde, &pde_host_addr) == -1) {
PrintError("Could not lookup host address of guest PDE\n");
return -1;
}
if ((tmp_pde[i].present) && (tmp_pde[i].large_page == 0)) {
addr_t pte_host_addr;
- if (guest_pa_to_host_pa(info, (addr_t)(PDE32_T_ADDR(tmp_pde[i])), &pte_host_addr) == -1) {
+ 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;
}
pde32_t * shadow_pde = (pde32_t *)&(shadow_pd[PDE32_INDEX(location)]);
if (shadow_pde->large_page == 0) {
- pte32_t * shadow_pt = (pte32_t *)PDE32_T_ADDR((*shadow_pde));
+ pte32_t * shadow_pt = (pte32_t *)(addr_t)PDE32_T_ADDR((*shadow_pde));
pte32_t * shadow_pte = (pte32_t *)&(shadow_pt[PTE32_INDEX(location)]);
//if (shadow_pte->present == 1) {
-int handle_shadow_pagefault(struct guest_info * info, addr_t fault_addr, pf_error_t error_code) {
+int v3_handle_shadow_pagefault(struct guest_info * info, addr_t fault_addr, pf_error_t error_code) {
if (info->mem_mode == PHYSICAL_MEM) {
// 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);
+#endif
+
return handle_special_page_fault(info, fault_addr, fault_addr, error_code);
} else if (info->mem_mode == VIRTUAL_MEM) {
}
}
-addr_t create_new_shadow_pt32() {
+addr_t v3_create_new_shadow_pt() {
void * host_pde = 0;
- host_pde = V3_AllocPages(1);
+ host_pde = V3_VAddr(V3_AllocPages(1));
memset(host_pde, 0, PAGE_SIZE);
return (addr_t)host_pde;
if (host_page_type == HOST_REGION_INVALID) {
// Inject a machine check in the guest
- PrintDebug("Invalid Guest Address in page table (0x%x)\n", guest_fault_pa);
+ PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_fault_pa);
v3_raise_exception(info, MC_EXCEPTION);
return 0;
}
} else {
// Handle hooked pages as well as other special pages
if (handle_special_page_fault(info, fault_addr, guest_fault_pa, error_code) == -1) {
- PrintError("Special Page Fault handler returned error for address: %x\n", fault_addr);
+ PrintError("Special Page Fault handler returned error for address: %p\n", (void *)fault_addr);
return -1;
}
}
static int handle_shadow_pagefault32(struct guest_info * info, addr_t fault_addr, pf_error_t error_code) {
pde32_t * guest_pd = NULL;
pde32_t * shadow_pd = (pde32_t *)CR3_TO_PDE32(info->shdw_pg_state.shadow_cr3);
- addr_t guest_cr3 = CR3_TO_PDE32(info->shdw_pg_state.guest_cr3);
+ addr_t guest_cr3 = (addr_t) V3_PAddr( CR3_TO_PDE32(info->shdw_pg_state.guest_cr3) );
pt_access_status_t guest_pde_access;
pt_access_status_t shadow_pde_access;
pde32_t * guest_pde = NULL;
pde32_t * shadow_pde = (pde32_t *)&(shadow_pd[PDE32_INDEX(fault_addr)]);
- PrintDebug("Shadow page fault handler\n");
+ PrintDebug("Shadow page fault handler: %p\n", (void*) fault_addr );
if (guest_pa_to_host_va(info, guest_cr3, (addr_t*)&guest_pd) == -1) {
- PrintError("Invalid Guest PDE Address: 0x%x\n", guest_cr3);
+ PrintError("Invalid Guest PDE Address: 0x%p\n", (void *)guest_cr3);
return -1;
}
/* Was the page fault caused by the Guest's page tables? */
if (is_guest_pf(guest_pde_access, shadow_pde_access) == 1) {
PrintDebug("Injecting PDE pf to guest: (guest access error=%d) (pf error code=%d)\n",
- guest_pde_access, error_code);
+ *(uint_t *)&guest_pde_access, *(uint_t *)&error_code);
inject_guest_pf(info, fault_addr, error_code);
return 0;
}
if (shadow_pde_access == PT_ENTRY_NOT_PRESENT)
{
- pte32_t * shadow_pt = (pte32_t *)create_new_shadow_pt32();
+ pte32_t * shadow_pt = (pte32_t *)v3_create_new_shadow_pt();
shadow_pde->present = 1;
shadow_pde->user_page = guest_pde->user_page;
guest_pde->accessed = 1;
- shadow_pde->pt_base_addr = PD32_BASE_ADDR(shadow_pt);
+ shadow_pde->pt_base_addr = PD32_BASE_ADDR((addr_t)V3_PAddr(shadow_pt));
if (guest_pde->large_page == 0) {
shadow_pde->writable = guest_pde->writable;
} else {
+ // ?? What if guest pde is dirty a this point?
((pde32_4MB_t *)guest_pde)->dirty = 0;
shadow_pde->writable = 0;
}
//
// PTE fault
//
- pte32_t * shadow_pt = (pte32_t *)PDE32_T_ADDR((*shadow_pde));
+ pte32_t * shadow_pt = (pte32_t *)V3_VAddr( (void*)(addr_t) PDE32_T_ADDR(*shadow_pde) );
if (guest_pde->large_page == 0) {
pte32_t * guest_pt = NULL;
return 0;
}
- PrintDebug("Returning end of PDE function (rip=%x)\n", info->rip);
+ PrintDebug("Returning end of PDE function (rip=%p)\n", (void *)(addr_t)(info->rip));
return 0;
}
if (host_page_type == HOST_REGION_INVALID) {
// Inject a machine check in the guest
- PrintDebug("Invalid Guest Address in page table (0x%x)\n", guest_pa);
+ PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_pa);
v3_raise_exception(info, MC_EXCEPTION);
return 0;
}
if (find_pte_map(state->cached_ptes, PT32_PAGE_ADDR(guest_pa)) != NULL) {
// Check if the entry is a page table...
- PrintDebug("Marking page as Guest Page Table\n", shadow_pte->writable);
+ PrintDebug("Marking page as Guest Page Table %d\n", shadow_pte->writable);
shadow_pte->vmm_info = PT32_GUEST_PT;
}
state->cached_cr3 = 0;
}
- } else if ((guest_pte->dirty = 0) && (error_code.write == 0)) {
+ } else if ((guest_pte->dirty == 0) && (error_code.write == 0)) { // was =
shadow_pte->writable = 0;
}
} else {
// Page fault handled by hook functions
if (handle_special_page_fault(info, fault_addr, guest_pa, error_code) == -1) {
- PrintError("Special Page fault handler returned error for address: %x\n", fault_addr);
+ PrintError("Special Page fault handler returned error for address: %p\n", (void *)fault_addr);
return -1;
}
}
/* Currently Does not work with Segmentation!!! */
-int handle_shadow_invlpg(struct guest_info * info) {
- if (info->mem_mode != VIRTUAL_MEM) {
- // Paging must be turned on...
- // should handle with some sort of fault I think
- PrintError("ERROR: INVLPG called in non paged mode\n");
- return -1;
- }
+int v3_handle_shadow_invlpg(struct guest_info * info)
+{
+ if (info->mem_mode != VIRTUAL_MEM) {
+ // Paging must be turned on...
+ // should handle with some sort of fault I think
+ PrintError("ERROR: INVLPG called in non paged mode\n");
+ return -1;
+ }
- if (info->cpu_mode == PROTECTED) {
- char instr[15];
- int ret;
- int index = 0;
+ if (info->cpu_mode != PROTECTED)
+ return 0;
- ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
- if (ret != 15) {
- PrintError("Could not read instruction 0x%x (ret=%d)\n", info->rip, ret);
- return -1;
- }
+ uchar_t instr[15];
+ int index = 0;
+
+ int ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
+ if (ret != 15) {
+ PrintError("Could not read instruction 0x%p (ret=%d)\n", (void *)(addr_t)(info->rip), ret);
+ return -1;
+ }
- /* Can INVLPG work with Segments?? */
- while (is_prefix_byte(instr[index])) {
- index++;
- }
+ /* Can INVLPG work with Segments?? */
+ while (is_prefix_byte(instr[index])) {
+ index++;
+ }
- if ((instr[index] == (uchar_t)0x0f) &&
- (instr[index + 1] == (uchar_t)0x01)) {
+ if( instr[index + 0] != (uchar_t) 0x0f
+ || instr[index + 1] != (uchar_t) 0x01
+ ) {
+ PrintError("invalid Instruction Opcode\n");
+ PrintTraceMemDump(instr, 15);
+ return -1;
+ }
- addr_t first_operand;
- addr_t second_operand;
- operand_type_t addr_type;
- addr_t guest_cr3 = CR3_TO_PDE32(info->shdw_pg_state.guest_cr3);
+ addr_t first_operand;
+ addr_t second_operand;
+ addr_t guest_cr3 = (addr_t)V3_PAddr( (void*)(addr_t) CR3_TO_PDE32(info->shdw_pg_state.guest_cr3) );
- pde32_t * guest_pd = NULL;
+ pde32_t * guest_pd = NULL;
- if (guest_pa_to_host_va(info, guest_cr3, (addr_t*)&guest_pd) == -1) {
- PrintError("Invalid Guest PDE Address: 0x%x\n", guest_cr3);
- return -1;
- }
-
-
+ if (guest_pa_to_host_va(info, guest_cr3, (addr_t*)&guest_pd) == -1)
+ {
+ PrintError("Invalid Guest PDE Address: 0x%p\n", (void *)guest_cr3);
+ return -1;
+ }
+ index += 2;
- index += 2;
+ v3_operand_type_t addr_type = decode_operands32(&(info->vm_regs), instr + index, &index, &first_operand, &second_operand, REG32);
- addr_type = decode_operands32(&(info->vm_regs), instr + index, &index, &first_operand, &second_operand, REG32);
+ if (addr_type != MEM_OPERAND) {
+ PrintError("Invalid Operand type\n");
+ return -1;
+ }
- if (addr_type == MEM_OPERAND) {
pde32_t * shadow_pd = (pde32_t *)CR3_TO_PDE32(info->shdw_pg_state.shadow_cr3);
pde32_t * shadow_pde = (pde32_t *)&shadow_pd[PDE32_INDEX(first_operand)];
pde32_t * guest_pde;
//PrintDebug("PDE Index=%d\n", PDE32_INDEX(first_operand));
//PrintDebug("FirstOperand = %x\n", first_operand);
- PrintDebug("Invalidating page for %x\n", first_operand);
+ PrintDebug("Invalidating page for %p\n", (void *)first_operand);
guest_pde = (pde32_t *)&(guest_pd[PDE32_INDEX(first_operand)]);
if (guest_pde->large_page == 1) {
- shadow_pde->present = 0;
- PrintDebug("Invalidating Large Page\n");
- } else {
-
- if (shadow_pde->present == 1) {
- pte32_t * shadow_pt = (pte32_t *)PDE32_T_ADDR((*shadow_pde));
- pte32_t * shadow_pte = (pte32_t *)&shadow_pt[PTE32_INDEX(first_operand)];
+ shadow_pde->present = 0;
+ PrintDebug("Invalidating Large Page\n");
+ } else
+ if (shadow_pde->present == 1) {
+ pte32_t * shadow_pt = (pte32_t *)(addr_t)PDE32_T_ADDR((*shadow_pde));
+ pte32_t * shadow_pte = (pte32_t *) V3_VAddr( (void*) &shadow_pt[PTE32_INDEX(first_operand)] );
#ifdef DEBUG_SHADOW_PAGING
- PrintDebug("Setting not present\n");
- PrintPTE32(first_operand, shadow_pte);
+ PrintDebug("Setting not present\n");
+ PrintPTE32(first_operand, shadow_pte );
#endif
- shadow_pte->present = 0;
- }
+ shadow_pte->present = 0;
}
info->rip += index;
- } else {
- PrintError("Invalid Operand type\n");
- return -1;
- }
- } else {
- PrintError("invalid Instruction Opcode\n");
- PrintTraceMemDump(instr, 15);
- return -1;
- }
- }
-
- return 0;
+ return 0;
}
