addr_t fault_addr,
pf_error_t error_code) {
// Check to see if pde and pte exist (create them if not)
- pde32_t * pde = CR3_TO_PDE32_VA(info->ctrl_regs.cr3);
+ pde32_t * pde = NULL;
pte32_t * pte = NULL;
addr_t host_addr = 0;
struct v3_shadow_region * region = v3_get_shadow_region(info, fault_addr);
- if ((region == NULL) ||
- (region->host_type == SHDW_REGION_INVALID)) {
+ if (region == NULL) {
PrintError("Invalid region in passthrough page fault 32, addr=%p\n",
(void *)fault_addr);
return -1;
host_addr = v3_get_shadow_addr(region, fault_addr);
+ // Lookup the correct PDE address based on the PAGING MODE
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
+ pde = CR3_TO_PDE32_VA(info->ctrl_regs.cr3);
+ } else {
+ pde = CR3_TO_PDE32_VA(info->direct_map_pt);
+ }
+
+
// Fix up the PDE entry
if (pde[pde_index].present == 0) {
pte = (pte32_t *)create_generic_pt_page();
}
+
+
+static inline int invalidate_addr_32(struct guest_info * info, addr_t inv_addr) {
+ pde32_t * pde = NULL;
+ pte32_t * pte = NULL;
+
+ // TODO:
+ // Call INVLPGA
+
+ // clear the page table entry
+ int pde_index = PDE32_INDEX(inv_addr);
+ int pte_index = PTE32_INDEX(inv_addr);
+
+
+ // Lookup the correct PDE address based on the PAGING MODE
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
+ pde = CR3_TO_PDE32_VA(info->ctrl_regs.cr3);
+ } else {
+ pde = CR3_TO_PDE32_VA(info->direct_map_pt);
+ }
+
+ if (pde[pde_index].present == 0) {
+ return 0;
+ } else if (pde[pde_index].large_page) {
+ pde[pde_index].present = 0;
+ return 0;
+ }
+
+ pte = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pde[pde_index].pt_base_addr));
+
+ pte[pte_index].present = 0;
+
+ return 0;
+}
+
+
#endif