int guest_va_to_guest_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * guest_pa) {
- if (guest_info->page_mode == SHADOW_PAGING) {
- switch (guest_info->cpu_mode) {
- case REAL:
- case PROTECTED:
- case LONG:
- case PROTECTED_PAE:
- // guest virtual address is the same as the physical
- *guest_pa = guest_va;
- return 0;
- case PROTECTED_PG:
- {
- addr_t tmp_pa = 0;
- pde32_t * pde = 0;
- addr_t guest_pde = CR3_TO_PDE32(guest_info->shdw_pg_state.guest_cr3);
-
- if (guest_pa_to_host_va(guest_info, guest_pde, (addr_t *)&pde) == -1) {
- PrintDebug("In GVA->GPA: Invalid GPA(%x)->HVA PDE32 lookup\n", guest_pde);
- return -1;
- }
-
-
- switch (pde32_lookup(pde, guest_va, &tmp_pa)) {
- case PDE32_ENTRY_NOT_PRESENT:
- *guest_pa = 0;
- return -1;
- case PDE32_ENTRY_LARGE_PAGE:
- *guest_pa = tmp_pa;
- return 0;
- case PDE32_ENTRY_PTE32:
- {
- pte32_t * pte = 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_pa_to_host_va(guest_info, tmp_pa, (addr_t*)&pte) == -1) {
- PrintDebug("In GVA->GPA: Invalid GPA(%x)->HVA PTE32 lookup\n", 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) != 0) {
- PrintDebug("In GVA->GPA: PTE32 Lookup failure GVA=%x; PTE=%x\n", guest_va, pte);
- // PrintPT32(PDE32_INDEX(guest_va) << 22, pte);
- return -1;
- }
- return 0;
- }
- default:
- return -1;
- }
+ // 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(guest_info->shdw_pg_state.guest_cr3);
+ } else if (guest_info->shdw_pg_mode == NESTED_PAGING) {
+ guest_pde = CR3_TO_PDE32(guest_info->ctrl_regs.cr3);
}
- case PROTECTED_PAE_PG:
- {
- // Fill in
- }
- case LONG_PG:
+
+ if (guest_pa_to_host_va(guest_info, guest_pde, (addr_t *)&pde) == -1) {
+ PrintDebug("In GVA->GPA: Invalid GPA(%x)->HVA PDE32 lookup\n", guest_pde);
+ return -1;
+ }
+
+
+ switch (pde32_lookup(pde, guest_va, &tmp_pa)) {
+ case PDE32_ENTRY_NOT_PRESENT:
+ *guest_pa = 0;
+ return -1;
+ case PDE32_ENTRY_LARGE_PAGE:
+ *guest_pa = tmp_pa;
+ return 0;
+ case PDE32_ENTRY_PTE32:
{
- // Fill in
+ pte32_t * pte = 0;
+
+
+ if (guest_pa_to_host_va(guest_info, tmp_pa, (addr_t*)&pte) == -1) {
+ PrintDebug("In GVA->GPA: Invalid GPA(%x)->HVA PTE32 lookup\n", 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) != 0) {
+ PrintDebug("In GVA->GPA: PTE32 Lookup failure GVA=%x; PTE=%x\n", guest_va, pte);
+ // PrintPT32(PDE32_INDEX(guest_va) << 22, pte);
+ return -1;
+ }
+
+ return 0;
}
- default:
- return -1;
+ default:
+ return -1;
+ }
}
- } else if (guest_info->page_mode == NESTED_PAGING) {
-
- // Fill in
-
- } else {
+ case PROTECTED_PAE:
+ {
+ // Fill in
+ }
+ case LONG:
+ {
+ // Fill in
+ }
+ default:
return -1;
}
-
-
+
+
+
return 0;
}
int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge;
addr_t host_addr = 0;
+
+
+ /* JRL FIXME:
+ * This should be somewhere else....
+ */
+ /*
+ addr_t tmp_addr;
+
+ addr_t shadow_pde = CR3_TO_PDE32(guest_info->shdw_pg_state.shadow_cr3);
+
+ // Check the Shadow Page Tables first (Virtual TLB)
+ if (pt32_lookup((pde32_t *)shadow_pde, cursor, &tmp_addr) == 0) {
+ host_addr = tmp_addr;
+
+ if (host_pa_to_host_va(tmp_addr, &host_addr) != 0) {
+ return bytes_read;
+ }
+ } else {
+
+ // No entry in the VTLB, do a guest page table walk
+
+ if (guest_va_to_host_va(guest_info, cursor, &host_addr) != 0) {
+ PrintDebug("Invalid GVA(%x)->HVA lookup\n", cursor);
+ return bytes_read;
+ }
+ }
+*/
+ /* JRL: END GRUESOME HACK */
+
+
+
if (guest_va_to_host_va(guest_info, cursor, &host_addr) != 0) {
PrintDebug("Invalid GVA(%x)->HVA lookup\n", cursor);
return bytes_read;
}
+
+
memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy);
if (guest_pa_to_host_va(guest_info, cursor, &host_addr) != 0) {
return bytes_read;
- }
-
+ }
/*
PrintDebug("Trying to read %d bytes\n", bytes_to_copy);