int pde_index = PDE32_INDEX(fault_addr);
int pte_index = PTE32_INDEX(fault_addr);
- struct v3_shadow_region * region = v3_get_shadow_region(info->vm_info, fault_addr);
+ struct v3_mem_region * region = v3_get_mem_region(info->vm_info, info->cpu_id, fault_addr);
if (region == NULL) {
PrintError("Invalid region in passthrough page fault 32, addr=%p\n",
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);
// Fix up the PTE entry
if (pte[pte_index].present == 0) {
- pte[pte_index].user_page = 1;
- if (region->host_type == SHDW_REGION_ALLOCATED) {
- // Full access
- pte[pte_index].present = 1;
- pte[pte_index].writable = 1;
-
- pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr);
- } else if (region->host_type == SHDW_REGION_WRITE_HOOK) {
- // Only trap writes
- PrintDebug("Faulted in a write hook page\n");
+ if ((region->flags.alloced == 1) &&
+ (region->flags.read == 1)) {
+
+ pte[pte_index].user_page = 1;
+
pte[pte_index].present = 1;
- pte[pte_index].writable = 0;
+
+ if (region->flags.write == 1) {
+ pte[pte_index].writable = 1;
+ } else {
+ pte[pte_index].writable = 0;
+ }
+
+ if (v3_gpa_to_hpa(info, fault_addr, &host_addr) == -1) {
+ PrintError("Could not translate fault address (%p)\n", (void *)fault_addr);
+ return -1;
+ }
pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr);
- } else if (region->host_type == SHDW_REGION_FULL_HOOK) {
- // trap all accesses
- return v3_handle_mem_full_hook(info, fault_addr, fault_addr, region, error_code);
} else {
- PrintError("Unknown Region Type...\n");
- return -1;
+ return region->unhandled(info, fault_addr, fault_addr, region, error_code);
}
- }
-
- if ( (region->host_type == SHDW_REGION_WRITE_HOOK) &&
- (error_code.write == 1) ) {
- PrintDebug("Triggering Direct paging Write hook\n");
- return v3_handle_mem_wr_hook(info, fault_addr, fault_addr, region, error_code);
+ } else {
+ // We fix all permissions on the first pass,
+ // so we only get here if its an unhandled exception
+ return region->unhandled(info, fault_addr, fault_addr, region, error_code);
}
-
return 0;
}