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Diffstat (limited to 'arch/h8300/mm/fault.c')
| -rw-r--r-- | arch/h8300/mm/fault.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/h8300/mm/fault.c b/arch/h8300/mm/fault.c new file mode 100644 index 0000000..29e9af9 --- /dev/null +++ b/arch/h8300/mm/fault.c @@ -0,0 +1,58 @@ +/* + * linux/arch/h8300/mm/fault.c + * + * Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>, + * Copyright (C) 2000 Lineo, Inc. (www.lineo.com) + * + * Based on: + * + * linux/arch/m68knommu/mm/fault.c + * 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\n", + regs->sr, regs->pc, address, error_code); +#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; +} + |