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57 lines
1.4 KiB
57 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/arch/h8300/mm/fault.c |
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* |
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* Copyright (C) 1998 D. Jeff Dionne <[email protected]>, |
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* Copyright (C) 2000 Lineo, Inc. (www.lineo.com) |
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* |
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* Based on: |
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* |
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* linux/arch/m68knommu/mm/fault.c |
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* linux/arch/m68k/mm/fault.c |
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* |
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* Copyright (C) 1995 Hamish Macdonald |
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*/ |
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#include <linux/mman.h> |
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#include <linux/mm.h> |
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#include <linux/kernel.h> |
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#include <linux/ptrace.h> |
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void die(const char *str, struct pt_regs *fp, unsigned long err); |
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/* |
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* This routine handles page faults. It determines the problem, and |
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* then passes it off to one of the appropriate routines. |
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* |
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* error_code: |
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* bit 0 == 0 means no page found, 1 means protection fault |
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* bit 1 == 0 means read, 1 means write |
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* |
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* If this routine detects a bad access, it returns 1, otherwise it |
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* returns 0. |
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*/ |
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asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address, |
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unsigned long error_code) |
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{ |
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#ifdef DEBUG |
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pr_debug("regs->sr=%#x, regs->pc=%#lx, address=%#lx, %ld\n", |
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regs->sr, regs->pc, address, error_code); |
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#endif |
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/* |
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* Oops. The kernel tried to access some bad page. We'll have to |
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* terminate things with extreme prejudice. |
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*/ |
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if ((unsigned long) address < PAGE_SIZE) |
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pr_alert("Unable to handle kernel NULL pointer dereference"); |
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else |
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pr_alert("Unable to handle kernel access"); |
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printk(" at virtual address %08lx\n", address); |
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if (!user_mode(regs)) |
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die("Oops", regs, error_code); |
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do_exit(SIGKILL); |
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return 1; |
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}
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