c71799433a
We were missing the trace_hardirqs_on() instrumentation in the nommu case, resync with the MMU version of the page fault handler to have this behaving consistently. Also explicitly re-enable IRQs now that the assembly code isn't doing it for us any more. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
/*
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* arch/sh/mm/fault-nommu.c
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*
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* Copyright (C) 2002 - 2007 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/kernel.h>
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#include <linux/mm.h>
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#include <linux/hardirq.h>
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#include <linux/kprobes.h>
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#include <asm/system.h>
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#include <asm/ptrace.h>
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#include <asm/kgdb.h>
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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 __kprobes do_page_fault(struct pt_regs *regs,
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unsigned long writeaccess,
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unsigned long address)
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{
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trace_hardirqs_on();
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local_irq_enable();
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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 __kprobes __do_page_fault(struct pt_regs *regs,
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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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return (address >= TASK_SIZE);
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}
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