diff options
-rw-r--r-- | mmu.h | 1 | ||||
-rw-r--r-- | vm.c | 5 |
2 files changed, 4 insertions, 2 deletions
@@ -142,6 +142,7 @@ struct segdesc { // Address in page table or page directory entry #define PTE_ADDR(pte) ((uint)(pte) & ~0xFFF) +#define PTE_FLAGS(pte) ((uint)(pte) & 0xFFF) #ifndef __ASSEMBLER__ typedef uint pte_t; @@ -311,7 +311,7 @@ copyuvm(pde_t *pgdir, uint sz) { pde_t *d; pte_t *pte; - uint pa, i; + uint pa, i, flags; char *mem; if((d = setupkvm()) == 0) @@ -322,10 +322,11 @@ copyuvm(pde_t *pgdir, uint sz) if(!(*pte & PTE_P)) panic("copyuvm: page not present"); pa = PTE_ADDR(*pte); + flags = PTE_FLAGS(*pte); if((mem = kalloc()) == 0) goto bad; memmove(mem, (char*)p2v(pa), PGSIZE); - if(mappages(d, (void*)i, PGSIZE, v2p(mem), PTE_W|PTE_U) < 0) + if(mappages(d, (void*)i, PGSIZE, v2p(mem), flags) < 0) goto bad; } return d; |