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mm: fix page fault on process exit

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rusya
2025-06-24 17:08:22 +03:00
parent bfdd3b6b6a
commit e3eba88958
1 changed files with 3 additions and 4 deletions
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src/mm/paging.c
+3 -4
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@@ -26,7 +26,7 @@ uint32_t setup_tmp_pgdir(uint32_t magic, uint32_t info)
} }
/* Address is PAGE_OFFSET plus memory size minus 4KB */ /* Address is PAGE_OFFSET plus memory size minus 4KB */
pagedir_address = PAGE_OFFSET + (memksize * 1024) - 4096; pagedir_address = PAGE_OFFSET + (memksize * 1024) - memksize;
pagedir_address = PAGE_ALIGN(pagedir_address); pagedir_address = PAGE_ALIGN(pagedir_address);
kpage_dir = (uint32_t *)pagedir_address; kpage_dir = (uint32_t *)pagedir_address;
@@ -40,9 +40,8 @@ uint32_t setup_tmp_pgdir(uint32_t magic, uint32_t info)
page_table[n] = (n << PAGE_SHIFT) | PAGE_PRESENT | PAGE_RW; page_table[n] = (n << PAGE_SHIFT) | PAGE_PRESENT | PAGE_RW;
if(!(n % 1024)) { if(!(n % 1024)) {
pd = n / 1024; pd = n / 1024;
uint32_t pt_phys = (uint32_t)page_table - PAGE_OFFSET + (PAGE_SIZE * pd); kpage_dir[pd] = (unsigned int)(pagedir_address + (PAGE_SIZE * pd) + GDT_BASE) | PAGE_PRESENT | PAGE_RW;
kpage_dir[pd] = pt_phys | PAGE_PRESENT | PAGE_RW;//TODO: fix, I don't think pd should have DPL3 kpage_dir[GET_PGDIR(PAGE_OFFSET) + pd] = (unsigned int)(pagedir_address + (PAGE_SIZE * pd) + GDT_BASE) | PAGE_PRESENT | PAGE_RW;
kpage_dir[GET_PGDIR(PAGE_OFFSET) + pd] = pt_phys | PAGE_PRESENT | PAGE_RW;//TODO: fix, I don't think pd should have DPL3
} }
} }