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Commit 0630e45c authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Check oops_may_print() in unhandled fault. 



Only print out pgd/pte data in the oops path if oops_may_print()
holds true. Follows the i386 implementation.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent fc1d4c9c

arch/sh/mm/fault.c

+29 −16
Original line number Diff line number Diff line
@@ -32,7 +32,6 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs, 
	struct task_struct *tsk;

	struct mm_struct *mm;

	struct vm_area_struct * vma;

	unsigned long page;

	int si_code;

	siginfo_t info;
@@ -170,24 +169,38 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs, 
 * terminate things with extreme prejudice.

 *

 */



	bust_spinlocks(1);



	if (oops_may_print()) {

		__typeof__(pte_val(__pte(0))) page;



		if (address < PAGE_SIZE)

		printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");

			printk(KERN_ALERT "Unable to handle kernel NULL "

					  "pointer dereference");

		else

		printk(KERN_ALERT "Unable to handle kernel paging request");

			printk(KERN_ALERT "Unable to handle kernel paging "

					  "request");

		printk(" at virtual address %08lx\n", address);

		printk(KERN_ALERT "pc = %08lx\n", regs->pc);

		page = (unsigned long)get_TTB();

		if (page) {

		page = ((unsigned long *) page)[address >> PGDIR_SHIFT];

			page = ((__typeof__(page) *) __va(page))[address >>

								 PGDIR_SHIFT];

			printk(KERN_ALERT "*pde = %08lx\n", page);

			if (page & _PAGE_PRESENT) {

				page &= PAGE_MASK;

				address &= 0x003ff000;

			page = ((unsigned long *) __va(page))[address >> PAGE_SHIFT];

				page = ((__typeof__(page) *)

						__va(page))[address >>

							    PAGE_SHIFT];

				printk(KERN_ALERT "*pte = %08lx\n", page);

			}

		}

	}



	die("Oops", regs, writeaccess);

	bust_spinlocks(0);

	do_exit(SIGKILL);



/*