diff options
Diffstat (limited to 'arch/sh/mm/fault.c')
| -rw-r--r-- | arch/sh/mm/fault.c | 68 |
1 files changed, 40 insertions, 28 deletions
diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c index c878faa4ae46..964c6767dc73 100644 --- a/arch/sh/mm/fault.c +++ b/arch/sh/mm/fault.c @@ -32,8 +32,8 @@ 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; + int fault; siginfo_t info; trace_hardirqs_on(); @@ -125,20 +125,18 @@ good_area: * the fault. */ survive: - switch (handle_mm_fault(mm, vma, address, writeaccess)) { - case VM_FAULT_MINOR: - tsk->min_flt++; - break; - case VM_FAULT_MAJOR: - tsk->maj_flt++; - break; - case VM_FAULT_SIGBUS: - goto do_sigbus; - case VM_FAULT_OOM: + fault = handle_mm_fault(mm, vma, address, writeaccess); + if (unlikely(fault & VM_FAULT_ERROR)) { + if (fault & VM_FAULT_OOM) goto out_of_memory; - default: - BUG(); + else if (fault & VM_FAULT_SIGBUS) + goto do_sigbus; + BUG(); } + if (fault & VM_FAULT_MAJOR) + tsk->maj_flt++; + else + tsk->min_flt++; up_read(&mm->mmap_sem); return; @@ -170,24 +168,38 @@ no_context: * terminate things with extreme prejudice. * */ - if (address < PAGE_SIZE) - printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference"); - else - 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]; - printk(KERN_ALERT "*pde = %08lx\n", page); - if (page & _PAGE_PRESENT) { - page &= PAGE_MASK; - address &= 0x003ff000; - page = ((unsigned long *) __va(page))[address >> PAGE_SHIFT]; - printk(KERN_ALERT "*pte = %08lx\n", page); + + 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"); + else + 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 = ((__typeof__(page) *) __va(page))[address >> + PGDIR_SHIFT]; + printk(KERN_ALERT "*pde = %08lx\n", page); + if (page & _PAGE_PRESENT) { + page &= PAGE_MASK; + address &= 0x003ff000; + 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); /* |