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Add offset support to physica_address

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This commit is contained in:
Baptiste Wicht 2016-07-09 12:32:49 +02:00
parent 8698b7c19f
commit 6ff6be0754
1 changed files with 4 additions and 1 deletions
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5
kernel/src/paging.cpp
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@ -212,6 +212,9 @@ size_t paging::physical_address(size_t virt){
return 0; return 0;
} }
// Offset inside the page
auto offset = virt & uint64_t((1 << 13) - 1);
//Find the correct indexes inside the paging table for the physical address //Find the correct indexes inside the paging table for the physical address
auto pml4e = pml4_entry(virt); auto pml4e = pml4_entry(virt);
auto pdpte = pdpt_entry(virt); auto pdpte = pdpt_entry(virt);
@ -223,7 +226,7 @@ size_t paging::physical_address(size_t virt){
auto pd = find_pd(pdpt, pdpte); auto pd = find_pd(pdpt, pdpte);
auto pt = find_pt(pd, pde); auto pt = find_pt(pd, pde);
return reinterpret_cast<uintptr_t>(pt[pte]) & ~0xFFF; return offset + reinterpret_cast<uintptr_t>(pt[pte]) & ~0xFFF;
} }
bool paging::page_present(size_t virt){ bool paging::page_present(size_t virt){