Re: [RFC PATCH 5/6] uprobes: add bp_vaddr argument to consumerhandler

From: Oleg Nesterov
Date: Sat Dec 22 2012 - 12:13:12 EST

Forgot to ask...

On 12/22, Oleg Nesterov wrote:
> On 12/21, Anton Arapov wrote:
> >
> > struct uprobe_consumer {
> > - int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs);
> > + int (*handler)(struct uprobe_consumer *self, unsigned long bp_vaddr, struct pt_regs *regs);
> It seems that we can do better...
> Just change regs->ip before calling ->handler().

Josh, Frank, will it work for you?

I assume that stap never needs the "real" ->ip after bp, it only needs
to know which bp the task hits. And once again, in any case ->ip will
be changed after ->handler() is called.


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