58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* 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>
|
|
|
|
|
|
void die(const char *str, struct pt_regs *fp, unsigned long err);
|
|
|
|
/*
|
|
* 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
|
|
pr_debug("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)
|
|
pr_alert("Unable to handle kernel NULL pointer dereference");
|
|
else
|
|
pr_alert("Unable to handle kernel access");
|
|
printk(" at virtual address %08lx\n", address);
|
|
if (!user_mode(regs))
|
|
die("Oops", regs, error_code);
|
|
make_task_dead(SIGKILL);
|
|
|
|
return 1;
|
|
}
|