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/* * X86_32 * Handle a fault on the vmalloc or module mapping area * * X86_64 * Handle a fault on the vmalloc area * * This assumes no large pages in there. */ static int vmalloc_fault(unsigned long address) { #ifdef CONFIG_X86_32 unsigned long pgd_paddr; pmd_t *pmd_k; pte_t *pte_k; /* Make sure we are in vmalloc area */ if (!(address >= VMALLOC_START && address < VMALLOC_END)) return -1; /* * Synchronize this task's top level page-table * with the 'reference' page table. * * Do _not_ use "current" here. We might be inside * an interrupt in the middle of a task switch.. */ pgd_paddr = read_cr3(); pmd_k = vmalloc_sync_one(__va(pgd_paddr), address);========================> using cr3 to derive the pgd. if (!pmd_k) return -1; pte_k = pte_offset_kernel(pmd_k, address); if (!pte_present(*pte_k)) return -1; return 0; #else pgd_t *pgd, *pgd_ref; pud_t *pud, *pud_ref; pmd_t *pmd, *pmd_ref; pte_t *pte, *pte_ref; /* Make sure we are in vmalloc area */ if (!(address >= VMALLOC_START && address < VMALLOC_END)) |
