C++ (Cpp) pd32_idx Examples

Example #1

File: mmu_walk.c Project: Debug-Orz/ramooflax

/*
** pmode: 4MB and 4KB pages
** cr4.pse is used
*/
static inline
int pg_walk_pmode(cr3_reg_t *cr3,
		  offset_t _vaddr, offset_t *_paddr,
		  size_t *psz, int chk)
{
   pde32_t  *pd, *pde;
   pte32_t  *pt, *pte;
   uint32_t paddr;
   uint32_t vaddr = _vaddr & 0xffffffff;

   pd = (pde32_t*)page_addr(cr3->addr);
   if(chk && vmm_area(pd))
   {
      debug(PG_W, "pd in vmm area\n");
      return 0;
   }

   pde = &pd[pd32_idx(vaddr)];
   debug(PG_W, "pde @ 0x%X = 0x%x\n", (offset_t)pde, pde->raw);

   if(!pg_present(pde))
   {
      debug(PG_W, "pde not present\n");
      return 0;
   }

   if(__cr4.pse && pg_large(pde))
   {
      debug(PG_W, "large page found (pde->addr 0x%x)\n", (uint32_t)pde->page.addr);
      paddr = pg_4M_addr((uint32_t)pde->page.addr) + pg_4M_offset(vaddr);
      *psz = PG_4M_SIZE;
      goto __prepare_addr;
   }

   pt = (pte32_t*)page_addr(pde->addr);
   if(chk && vmm_area(pt))
   {
      debug(PG_W, "pt in vmm area\n");
      return 0;
   }

   pte = &pt[pt32_idx(vaddr)];
   debug(PG_W, "pte @ 0x%X = 0x%x\n", (offset_t)pte, pte->raw);

   if(!pg_present(pte))
   {
      debug(PG_W, "pte not present\n");
      return 0;
   }

   paddr = pg_4K_addr((uint32_t)pte->addr) + pg_4K_offset(vaddr);
   *psz = PG_4K_SIZE;

__prepare_addr:
   if(chk && vmm_area(paddr))
   {
      debug(PG_W, "paddr 0x%x in vmm area\n", paddr);
      return 0;
   }

   debug(PG_W, "pmode vaddr 0x%x -> paddr 0x%x\n", vaddr, paddr);
   *_paddr = (offset_t)paddr;
   return 1;
}

Example #2

File: mmu_walk.c Project: sduverger/ramooflax

/*
** pmode: 4MB and 4KB pages
** cr4.pse is used
*/
static int __pg_walk_pmode(cr3_reg_t *cr3, offset_t _vaddr, pg_wlk_t *wlk)
{
   pde32_t  *pd, *pde;
   pte32_t  *pt, *pte;
   uint32_t vaddr = _vaddr & 0xffffffff;

   wlk->attr = 0;

   pd = (pde32_t*)page_addr(cr3->addr);
   if(vmm_area_range(pd, PG_4K_SIZE))
   {
      debug(PG_WLK, "pd32 in vmm area\n");
      return VM_FAIL;
   }

   pde = &pd[pd32_idx(vaddr)];
   debug(PG_WLK, "pde32 @ 0x%X = 0x%x\n", (offset_t)pde, pde->raw);

   if(!pg_present(pde))
   {
      debug(PG_WLK, "pde32 not present\n");
      wlk->type  = PG_WALK_TYPE_PDE32;
      wlk->entry = (void*)pde;
      return VM_FAULT;
   }

   wlk->u = pde->lvl;
   wlk->r = 1;
   wlk->w = pde->rw;
   wlk->x = 1;

   if(__cr4.pse && pg_large(pde))
   {
      wlk->addr  = pg_4M_addr((uint32_t)pde->page.addr) + pg_4M_offset(vaddr);
      wlk->type  = PG_WALK_TYPE_PDE32;
      wlk->size  = PG_4M_SIZE;
      wlk->entry = (void*)pde;
      goto __success;
   }

   pt = (pte32_t*)page_addr(pde->addr);
   if(vmm_area_range(pt, PG_4K_SIZE))
   {
      debug(PG_WLK, "pt32 in vmm area\n");
      return VM_FAIL;
   }

   pte = &pt[pt32_idx(vaddr)];
   debug(PG_WLK, "pte32 @ 0x%X = 0x%x\n", (offset_t)pte, pte->raw);

   if(!pg_present(pte))
   {
      debug(PG_WLK, "pte32 not present\n");
      wlk->type  = PG_WALK_TYPE_PTE32;
      wlk->entry = (void*)pte;
      return VM_FAULT;
   }

   wlk->addr  = (offset_t)(pg_4K_addr((uint32_t)pte->addr) + pg_4K_offset(vaddr));
   wlk->type  = PG_WALK_TYPE_PTE32;
   wlk->size  = PG_4K_SIZE;
   wlk->entry = (void*)pte;
   wlk->u    &= pte->lvl;
   wlk->w    &= pte->rw;

__success:
   debug(PG_WLK, "pmode vaddr 0x%x -> guest paddr 0x%X\n", vaddr, wlk->addr);
   return VM_DONE;
}