Commit fd32cb3a authored Sep 25, 2006 by Keshavamurthy Anil S Committed by Tony Luck Sep 26, 2006

[IA64] kprobes: fixup the pagefault exception caused by probehandlers



If the user-specified kprobe handler causes the page fault when accessing
user space address, fixup this fault since do_page_fault() should not
continue as the kprobe handler are run with preemption disabled.

Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

parent 214ddde2

arch/ia64/kernel/kprobes.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -771,6 +771,12 @@ static int __kprobes kprobes_fault_handler(struct pt_regs *regs, int trapnr)
		*/
		if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr))
		return 1;
		/*
		* In case the user-specified fault handler returned
		* zero, try to fix up.
		*/
		if (ia64_done_with_exception(regs))
		return 1;

		/*
		* Let ia64_do_page_fault() fix it.