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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [arch/] [m68knommu/] [mm/] [fault.c] - Rev 1765
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/* * linux/arch/m68knommu/mm/fault.c * * Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>, * The Silver Hammer Group, Ltd. * * Based on: * * linux/arch/m68k/mm/fault.c * * Copyright (C) 1995 Hamish Macdonald */ #include <linux/mman.h> #include <linux/mm.h> #include <linux/kernel.h> #include <linux/ptrace.h> #include <asm/system.h> #include <asm/pgtable.h> extern void die_if_kernel(char *, struct pt_regs *, long); /* * This routine handles page faults. It determines the problem, and * then passes it off to one of the appropriate routines. * * error_code: * bit 0 == 0 means no page found, 1 means protection fault * bit 1 == 0 means read, 1 means write * * If this routine detects a bad access, it returns 1, otherwise it * returns 0. */ asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address, unsigned long error_code) { #ifdef DEBUG printk ("regs->sr=%#x, regs->pc=%#lx, address=%#lx, %ld, %p\n", regs->sr, regs->pc, address, error_code, tsk->mm->pgd); #endif /* * Oops. The kernel tried to access some bad page. We'll have to * terminate things with extreme prejudice. */ if ((unsigned long) address < PAGE_SIZE) { printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference"); } else printk(KERN_ALERT "Unable to handle kernel access"); printk(" at virtual address %08lx\n",address); die_if_kernel("Oops", regs, error_code); do_exit(SIGKILL); return 1; }