-#define MAX_PTE32_ENTRIES 1024
#define MAX_PDE32_ENTRIES 1024
+#define MAX_PTE32_ENTRIES 1024
-#define MAX_PTE32PAE_ENTRIES 512
-#define MAX_PDE32PAE_ENTRIES 512
#define MAX_PDPE32PAE_ENTRIES 4
+#define MAX_PDE32PAE_ENTRIES 512
+#define MAX_PTE32PAE_ENTRIES 512
-#define MAX_PTE64_ENTRIES 512
-#define MAX_PDE64_ENTRIES 512
-#define MAX_PDPE64_ENTRIES 512
#define MAX_PML4E64_ENTRIES 512
+#define MAX_PDPE64_ENTRIES 512
+#define MAX_PDE64_ENTRIES 512
+#define MAX_PTE64_ENTRIES 512
+
/* Converts an address into a page table index */
typedef enum {PT_ENTRY_NOT_PRESENT, PT_ENTRY_LARGE_PAGE, PT_ENTRY_PAGE} pt_entry_type_t;
typedef enum {PT_ACCESS_OK, PT_ACCESS_NOT_PRESENT, PT_ACCESS_WRITE_ERROR, PT_ACCESS_USER_ERROR} pt_access_status_t;
+
+typedef struct gen_pt {
+ uint_t present : 1;
+ uint_t writable : 1;
+ uint_t user_page : 1;
+} __attribute__((packed)) gen_pt_t;
+
typedef struct pde32 {
uint_t present : 1;
uint_t writable : 1;
struct guest_info;
-int v3_translate_guest_pt_32(struct guest_info * info, addr_t guest_cr3, addr_t vaddr, addr_t * paddr);
-int v3_translate_guest_pt_32pae(struct guest_info * info, addr_t guest_cr3, addr_t vaddr, addr_t * paddr);
-int v3_translate_guest_pt_64(struct guest_info * info, addr_t guest_cr3, addr_t vaddr, addr_t * paddr);
+int v3_translate_guest_pt_32(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr, addr_t * paddr);
+int v3_translate_guest_pt_32pae(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr, addr_t * paddr);
+int v3_translate_guest_pt_64(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr, addr_t * paddr);
-int v3_translate_host_pt_32(addr_t host_cr3, addr_t vaddr, addr_t * paddr);
-int v3_translate_host_pt_32pae(addr_t host_cr3, addr_t vaddr, addr_t * paddr);
-int v3_translate_host_pt_64(addr_t host_cr3, addr_t vaddr, addr_t * paddr);
+int v3_translate_host_pt_32(v3_reg_t host_cr3, addr_t vaddr, addr_t * paddr);
+int v3_translate_host_pt_32pae(v3_reg_t host_cr3, addr_t vaddr, addr_t * paddr);
+int v3_translate_host_pt_64(v3_reg_t host_cr3, addr_t vaddr, addr_t * paddr);
/* Should these be static? */
-pt_access_status_t can_access_pde32(pde32_t * pde, addr_t addr, pf_error_t access_type);
-pt_access_status_t can_access_pte32(pte32_t * pte, addr_t addr, pf_error_t access_type);
+pt_access_status_t inline v3_can_access_pde32(pde32_t * pde, addr_t addr, pf_error_t access_type);
+pt_access_status_t inline v3_can_access_pte32(pte32_t * pte, addr_t addr, pf_error_t access_type);
+
+pt_access_status_t inline v3_can_access_pdpe32pae(pdpe32pae_t * pdpe, addr_t addr, pf_error_t access_type);
+pt_access_status_t inline v3_can_access_pde32pae(pde32pae_t * pde, addr_t addr, pf_error_t access_type);
+pt_access_status_t inline v3_can_access_pte32pae(pte32pae_t * pte, addr_t addr, pf_error_t access_type);
+
+pt_access_status_t inline v3_can_access_pml4e64(pml4e64_t * pmle, addr_t addr, pf_error_t access_type);
+pt_access_status_t inline v3_can_access_pdpe64(pdpe64_t * pdpe, addr_t addr, pf_error_t access_type);
+pt_access_status_t inline v3_can_access_pde64(pde64_t * pde, addr_t addr, pf_error_t access_type);
+pt_access_status_t inline v3_can_access_pte32(pte32_t * pte, addr_t addr, pf_error_t access_type);
+
int guest_va_to_guest_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * guest_pa) {
+ v3_reg_t guest_cr3 = 0;
+
if (guest_info->mem_mode == PHYSICAL_MEM) {
// guest virtual address is the same as the physical
*guest_pa = guest_va;
return 0;
}
+ if (guest_info->mem_mode == SHADOW_PAGING) {
+ guest_cr3 = guest_info->shdw_pg_state.guest_cr3;
+ } else {
+ guest_cr3 = guest_info->ctrl_regs.cr3;
+ }
// Guest Is in Paged mode
switch (guest_info->cpu_mode) {
case PROTECTED:
- {
- addr_t tmp_pa = 0;
- pde32_t * pde = 0;
- addr_t guest_pde = 0;
-
- if (guest_info->shdw_pg_mode == SHADOW_PAGING) {
- guest_pde = CR3_TO_PDE32_PA((guest_info->shdw_pg_state.guest_cr3));
- } else if (guest_info->shdw_pg_mode == NESTED_PAGING) {
- guest_pde = CR3_TO_PDE32_PA((guest_info->ctrl_regs.cr3));
- }
-
- if (guest_pa_to_host_va(guest_info, guest_pde, (addr_t *)&pde) == -1) {
- PrintError("In GVA->GPA: Invalid GPA(%p)->HVA PDE32 lookup\n",
- (void *)guest_pde);
- return -1;
- }
-
-
- switch (pde32_lookup(pde, guest_va, &tmp_pa)) {
- case PT_ENTRY_NOT_PRESENT:
- *guest_pa = 0;
- return -1;
- case PT_ENTRY_LARGE_PAGE:
- *guest_pa = tmp_pa;
- return 0;
- case PT_ENTRY_PAGE:
- {
- pte32_t * pte = 0;
-
-
- if (guest_pa_to_host_va(guest_info, tmp_pa, (addr_t*)&pte) == -1) {
- PrintError("In GVA->GPA: Invalid GPA(%p)->HVA PTE32 lookup\n",
- (void *)guest_pa);
- return -1;
- }
-
- //PrintDebug("PTE host addr=%x, GVA=%x, GPA=%x(should be 0)\n", pte, guest_va, *guest_pa);
-
- if (pte32_lookup(pte, guest_va, guest_pa) != PT_ENTRY_PAGE) {
- PrintError("In GVA->GPA: PTE32 Lookup failure GVA=%p; PTE=%p\n",
- (void *)guest_va, (void *)pte);
- // PrintPT32(PDE32_INDEX(guest_va) << 22, pte);
- return -1;
- }
-
- return 0;
- }
- default:
- return -1;
- }
- }
+ return v3_translate_guest_pt_32(guest_info, guest_cr3, guest_va, guest_pa);
case PROTECTED_PAE:
- {
- // Fill in
- }
+ return v3_translate_guest_pt_32pae(guest_info, guest_cr3, guest_va, guest_pa);
case LONG:
- {
- // Fill in
- }
+ case LONG_32_COMPAT:
+ case LONG_16_COMPAT:
+ return v3_translate_guest_pt_64(guest_info, guest_cr3, guest_va, guest_pa);
default:
return -1;
}
-
-
return 0;
}
}
-int v3_translate_guest_pt_32(struct guest_info * info, addr_t guest_cr3, addr_t vaddr, addr_t * paddr) {
+int v3_translate_guest_pt_32(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr, addr_t * paddr) {
addr_t guest_pde_pa = CR3_TO_PDE32_PA(guest_cr3);
pde32_t * guest_pde = 0;
addr_t guest_pte_pa = 0;
}
-int v3_translate_guest_pt_32pae(struct guest_info * info, addr_t guest_cr3, addr_t vaddr, addr_t * paddr) {
+int v3_translate_guest_pt_32pae(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr, addr_t * paddr) {
addr_t guest_pdpe_pa = CR3_TO_PDPE32PAE_PA(guest_cr3);
pdpe32pae_t * guest_pdpe = 0;
addr_t guest_pde_pa = 0;
return 0;
}
-int v3_translate_guest_pt_64(struct guest_info * info, addr_t guest_cr3, addr_t vaddr, addr_t * paddr) {
+int v3_translate_guest_pt_64(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr, addr_t * paddr) {
addr_t guest_pml4_pa = CR3_TO_PML4E64_PA(guest_cr3);
pml4e64_t * guest_pmle = 0;
addr_t guest_pdpe_pa = 0;
-int v3_translate_host_pt_32(addr_t host_cr3, addr_t vaddr, addr_t * paddr) {
+int v3_translate_host_pt_32(v3_reg_t host_cr3, addr_t vaddr, addr_t * paddr) {
pde32_t * host_pde = (pde32_t *)CR3_TO_PDE32_VA(host_cr3);
pte32_t * host_pte = 0;
}
-int v3_translate_host_pt_32pae(addr_t host_cr3, addr_t vaddr, addr_t * paddr) {
+int v3_translate_host_pt_32pae(v3_reg_t host_cr3, addr_t vaddr, addr_t * paddr) {
pdpe32pae_t * host_pdpe = (pdpe32pae_t *)CR3_TO_PDPE32PAE_VA(host_cr3);
pde32pae_t * host_pde = NULL;
pte32pae_t * host_pte = NULL;
}
-int v3_translate_host_pt_64(addr_t host_cr3, addr_t vaddr, addr_t * paddr) {
+int v3_translate_host_pt_64(v3_reg_t host_cr3, addr_t vaddr, addr_t * paddr) {
pml4e64_t * host_pmle = (pml4e64_t *)CR3_TO_PML4E64_VA(host_cr3);
pdpe64_t * host_pdpe = NULL;
pde64_t * host_pde = NULL;
+static pt_access_status_t can_access_pt(gen_pt_t * pt, pf_error_t access_type) {
+ if (pt->present == 0) {
+ return PT_ACCESS_NOT_PRESENT;
+ } else if ((pt->writable == 0) && (access_type.write == 1)) {
+ return PT_ACCESS_WRITE_ERROR;
+ } else if ((pt->user_page == 0) && (access_type.user == 1)) {
+ // Check CR0.WP?
+ return PT_ACCESS_USER_ERROR;
+ }
+ return PT_ACCESS_OK;
+}
+/*
+ * 32 bit access checks
+ */
+pt_access_status_t inline v3_can_access_pde32(pde32_t * pde, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pde[PDE32_INDEX(addr)];
+ return can_access_pt(entry, access_type);
+}
+pt_access_status_t inline v3_can_access_pte32(pte32_t * pte, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pte[PTE32_INDEX(addr)];
+ return can_access_pt(entry, access_type);
+}
-pt_access_status_t can_access_pde32(pde32_t * pde, addr_t addr, pf_error_t access_type) {
- pde32_t * entry = &pde[PDE32_INDEX(addr)];
+/*
+ * 32 bit PAE access checks
+ */
+pt_access_status_t inline v3_can_access_pdpe32pae(pdpe32pae_t * pdpe, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pdpe[PDPE32PAE_INDEX(addr)];
+ return can_access_pt(entry, access_type);
+}
- if (entry->present == 0) {
- return PT_ACCESS_NOT_PRESENT;
- } else if ((entry->writable == 0) && (access_type.write == 1)) {
- return PT_ACCESS_WRITE_ERROR;
- } else if ((entry->user_page == 0) && (access_type.user == 1)) {
- // Check CR0.WP?
- return PT_ACCESS_USER_ERROR;
- }
+pt_access_status_t inline v3_can_access_pde32pae(pde32pae_t * pde, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pde[PDE32PAE_INDEX(addr)];
+ return can_access_pt(entry, access_type);
+}
- return PT_ACCESS_OK;
+pt_access_status_t inline v3_can_access_pte32pae(pte32pae_t * pte, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pte[PTE32PAE_INDEX(addr)];
+ return can_access_pt(entry, access_type);
}
+/*
+ * 64 Bit access checks
+ */
+pt_access_status_t inline v3_can_access_pml4e64(pml4e64_t * pmle, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pmle[PML4E64_INDEX(addr)];
+ return can_access_pt(entry, access_type);
+}
-pt_access_status_t can_access_pte32(pte32_t * pte, addr_t addr, pf_error_t access_type) {
- pte32_t * entry = &pte[PTE32_INDEX(addr)];
+pt_access_status_t inline v3_can_access_pdpe64(pdpe64_t * pdpe, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pdpe[PDPE64_INDEX(addr)];
+ return can_access_pt(entry, access_type);
+}
- if (entry->present == 0) {
- return PT_ACCESS_NOT_PRESENT;
- } else if ((entry->writable == 0) && (access_type.write == 1)) {
- return PT_ACCESS_WRITE_ERROR;
- } else if ((entry->user_page == 0) && (access_type.user == 1)) {
- // Check CR0.WP?
- return PT_ACCESS_USER_ERROR;
- }
+pt_access_status_t inline v3_can_access_pde64(pde64_t * pde, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pde[PDE32_INDEX(addr)];
+ return can_access_pt(entry, access_type);
+}
- return PT_ACCESS_OK;
+pt_access_status_t inline v3_can_access_pte64(pte64_t * pte, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pte[PTE64_INDEX(addr)];
+ return can_access_pt(entry, access_type);
}
+
+
/* We generate a page table to correspond to a given memory layout
* pulling pages from the mem_list when necessary
* If there are any gaps in the layout, we add them as unmapped pages
// Check the guest page permissions
- guest_pde_access = can_access_pde32(guest_pd, fault_addr, error_code);
+ guest_pde_access = v3_can_access_pde32(guest_pd, fault_addr, error_code);
// Check the shadow page permissions
- shadow_pde_access = can_access_pde32(shadow_pd, fault_addr, error_code);
+ shadow_pde_access = v3_can_access_pde32(shadow_pd, fault_addr, error_code);
/* Was the page fault caused by the Guest's page tables? */
if (is_guest_pf(guest_pde_access, shadow_pde_access) == 1) {
addr_t fault_addr, pf_error_t error_code,
pte32_t * shadow_pt, pde32_4MB_t * large_guest_pde)
{
- pt_access_status_t shadow_pte_access = can_access_pte32(shadow_pt, fault_addr, error_code);
+ 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)]);
if (shadow_pte_access == PT_ACCESS_OK) {
// Check the guest page permissions
- guest_pte_access = can_access_pte32(guest_pt, fault_addr, error_code);
+ guest_pte_access = v3_can_access_pte32(guest_pt, fault_addr, error_code);
// Check the shadow page permissions
- shadow_pte_access = can_access_pte32(shadow_pt, fault_addr, error_code);
+ shadow_pte_access = v3_can_access_pte32(shadow_pt, fault_addr, error_code);
#ifdef DEBUG_SHADOW_PAGING
PrintDebug("Guest PTE: (access=%d)\n\t", guest_pte_access);
