static void
do_page_fault(struct frame *tf)
{
struct vm_area_struct *vma;
struct mm_struct *mm = curtask->mm;
viraddr_t address = rcr2();
if (address >= KERNEL_BASE_ADDR) {
//
}
vma = find_vma(mm, address);
if (!vma || vma->vm_start > address) {
printk("task [%08d] access invalid vma:%x, exiting\n",curtask->pid,address);
do_exit(curtask);
} else {
pte_t *pte = _page_walk (task2pgd(curtask),address,true);
if (!pte) {
printk("!pte do_page_fault!!!!\n");
do_exit(curtask);
}
handle_pte_fault(mm, vma, address, pte,tf->tf_trapno);
}
}
/*
* By the time we get here, we already hold the mm semaphore
*/
int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct * vma,
unsigned long address, int write_access)
{
int ret = -1;
pgd_t *pgd;
pmd_t *pmd;
pgd = pgd_offset(mm, address);
pmd = pmd_alloc(pgd, address);
if (pmd) {
pte_t * pte = pte_alloc(pmd, address);
if (pte)
ret = handle_pte_fault(mm, vma, address, write_access, pte);
}
return ret;
}
void handle_mm_fault(struct vm_area_struct *vma, unsigned long address,int write_access)
{
pgd_t * pgd;
pmd_t * pmd;
pte_t * pte;
pgd = pgd_offset(vma->vm_task, address);
pmd = pmd_alloc(pgd,address);
if(!pmd)
goto no_memory;
pte = pte_alloc(pmd, address);
if(!pte)
goto no_memory;
handle_pte_fault(vma,address,pte,write_access);
no_memory:
oom();
}
void handle_mm_fault(struct vm_area_struct * vma, unsigned long address,
int write_access)
{
pgd_t *pgd;
pmd_t *pmd;
pte_t *pte;
pgd = pgd_offset(vma->vm_mm, address);
pmd = pmd_alloc(pgd, address);
if (!pmd)
goto no_memory;
pte = pte_alloc(pmd, address);
if (!pte)
goto no_memory;
handle_pte_fault(vma, address, write_access, pte);
update_mmu_cache(vma, address, *pte);
return;
no_memory:
oom(current);
}
/*
* By the time we get here, we already hold the mm semaphore
*/
int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct * vma,
unsigned long address, int write_access)
{
pgd_t *pgd;
pmd_t *pmd;
current->state = TASK_RUNNING;
pgd = pgd_offset(mm, address);
/*
* We need the page table lock to synchronize with kswapd
* and the SMP-safe atomic PTE updates.
*/
spin_lock(&mm->page_table_lock);
pmd = pmd_alloc(mm, pgd, address);
if (pmd) {
pte_t * pte = pte_alloc(mm, pmd, address);
if (pte)
return handle_pte_fault(mm, vma, address, write_access, pte);
}
spin_unlock(&mm->page_table_lock);
return -1;
}
