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 = (addr_t)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%p\n", (void *)guest_cr3);
//
// PTE fault
//
- pte32_t * shadow_pt = (pte32_t *)(addr_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;
/* Currently Does not work with Segmentation!!! */
-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;
- }
+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) {
- uchar_t 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%p (ret=%d)\n", (void *)(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 *)(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)) {
-
- addr_t first_operand;
- addr_t second_operand;
- v3_operand_type_t addr_type;
- addr_t guest_cr3 = (addr_t)CR3_TO_PDE32(info->shdw_pg_state.guest_cr3);
+ if( instr[index + 0] != (uchar_t) 0x0f
+ || instr[index + 1] != (uchar_t) 0x01
+ ) {
+ PrintError("invalid Instruction Opcode\n");
+ PrintTraceMemDump(instr, 15);
+ return -1;
+ }
- pde32_t * guest_pd = NULL;
+ 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) );
- 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;
- }
+ 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%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;
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 *)(addr_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;
}