mirror of https://gitee.com/openkylin/linux.git
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
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/*
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* arch/sh/mm/fault-nommu.c
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*
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* Copyright (C) 2002 Paul Mundt
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*
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* Based on linux/arch/sh/mm/fault.c:
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* Copyright (C) 1999 Niibe Yutaka
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*
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* Released under the terms of the GNU GPL v2.0.
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*/
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/ptrace.h>
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#include <linux/mman.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/interrupt.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/pgalloc.h>
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#include <asm/mmu_context.h>
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#include <asm/cacheflush.h>
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#if defined(CONFIG_SH_KGDB)
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#include <asm/kgdb.h>
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#endif
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extern void die(const char *,struct pt_regs *,long);
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/*
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* This routine handles page faults. It determines the address,
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* and the problem, and then passes it off to one of the appropriate
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* routines.
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*/
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asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
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unsigned long address)
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{
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#if defined(CONFIG_SH_KGDB)
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if (kgdb_nofault && kgdb_bus_err_hook)
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kgdb_bus_err_hook();
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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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*/
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if (address < PAGE_SIZE) {
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printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");
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} else {
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printk(KERN_ALERT "Unable to handle kernel paging request");
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}
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printk(" at virtual address %08lx\n", address);
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printk(KERN_ALERT "pc = %08lx\n", regs->pc);
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die("Oops", regs, writeaccess);
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do_exit(SIGKILL);
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}
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asmlinkage int __do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
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unsigned long address)
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{
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#if defined(CONFIG_SH_KGDB)
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if (kgdb_nofault && kgdb_bus_err_hook)
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kgdb_bus_err_hook();
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#endif
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if (address >= TASK_SIZE)
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return 1;
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return 0;
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}
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