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Kernel: PageTable::map_range_at maps correctly the last page

This commit is contained in:
Bananymous 2023-05-30 23:56:07 +03:00
parent 57f7da6ce1
commit e86050f343
1 changed files with 6 additions and 3 deletions
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9
kernel/arch/x86_64/PageTable.cpp
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@ -284,7 +284,7 @@ namespace Kernel
pt[pte] = paddr | flags; pt[pte] = paddr | flags;
} }
void PageTable::map_range_at(paddr_t paddr, vaddr_t vaddr, size_t bytes, flags_t flags) void PageTable::map_range_at(paddr_t paddr, vaddr_t vaddr, size_t size, flags_t flags)
{ {
LockGuard _(m_lock); LockGuard _(m_lock);
@ -293,8 +293,11 @@ namespace Kernel
ASSERT(paddr % PAGE_SIZE == 0); ASSERT(paddr % PAGE_SIZE == 0);
ASSERT(vaddr % PAGE_SIZE == 0); ASSERT(vaddr % PAGE_SIZE == 0);
for (size_t offset = 0; offset < bytes; offset += PAGE_SIZE) size_t first_page = vaddr / PAGE_SIZE;
map_page_at(paddr + offset, vaddr + offset, flags); size_t last_page = (vaddr + size - 1) / PAGE_SIZE;
size_t page_count = last_page - first_page + 1;
for (size_t page = 0; page < page_count; page++)
map_page_at(paddr + page * PAGE_SIZE, vaddr + page * PAGE_SIZE, flags);
} }
uint64_t PageTable::get_page_data(vaddr_t vaddr) const uint64_t PageTable::get_page_data(vaddr_t vaddr) const