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2026-02-25 15:20:06 +01:00
parent 8b271e2470
commit 23b453dac8
3 changed files with 37 additions and 10 deletions
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4
kernel/memory/pagetable.cc
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@@ -160,7 +160,7 @@ void* getFreeVirtSpace(four_lvl_paging_t* search_table, uint8_t num_pages){
}
void setMapping(uintptr_t vaddr, void* frame, four_lvl_paging_t* flpt){
void setMapping(uintptr_t vaddr, void* frame, four_lvl_paging_t* flpt, uint8_t writeable){
uint16_t l4Index = (vaddr>>39) & 0x1FF;
uint16_t l3Index = (vaddr>>30) & 0x1FF;
uint16_t l2Index = (vaddr>>21) & 0x1FF;
@@ -207,7 +207,7 @@ void setMapping(uintptr_t vaddr, void* frame, four_lvl_paging_t* flpt){
assert(!(lvl1->entries[l1Index].present)); // should not be present, bc its a new mapping
lvl1->entries[l1Index] = {
.present = 1,
.write = 1,
.write = writeable,
.user = 1,
.address = (uintptr_t)frame >> 12
};

2
kernel/memory/pagetable.h
View File

@@ -50,7 +50,7 @@ typedef struct {
void write_identity_map(pagetable_t* identity_table, uint64_t size);
void create_basic_page_table(four_lvl_paging_t* table, pagetable_t* kernel_identity);
void load_cr3(void* cr3_value);
void setMapping(uintptr_t vaddr, void* frame, four_lvl_paging_t* flpt);
void setMapping(uintptr_t vaddr, void* frame, four_lvl_paging_t* flpt, uint8_t writeable =1);
uintptr_t isMapped(uintptr_t vaddr, four_lvl_paging_t* flpt);
void* getFreeVirtSpace(four_lvl_paging_t* search_table, uint8_t num_pages);
void copy_pagetable(four_lvl_paging_t* parent_table, four_lvl_paging_t* child_table);