On Sat, 16 May 2020 09:17:21 -0700
Doug Anderson wrote:
> Hi,
>
> On Sat, May 16, 2020 at 1:47 AM liwei (GF) wrote:
> >
> > >> - kprobes_save_local_irqflag(kcb, regs);
> > >> + kernel_prepare_single_step(>saved_irqflag, regs);
> > >
> > > Is there some reason to
Hi,
On Sat, May 16, 2020 at 1:47 AM liwei (GF) wrote:
>
> >> - kprobes_save_local_irqflag(kcb, regs);
> >> + kernel_prepare_single_step(>saved_irqflag, regs);
> >
> > Is there some reason to have two functions? It seems like every time
> > you call
Hi Douglas,
On 2020/5/14 8:21, Doug Anderson wrote:
(SNIP)
>> +/*
>> + * Interrupts need to be disabled before single-step mode is set, and not
>> + * reenabled until after single-step mode ends.
>> + * Without disabling interrupt on local CPU, there is a chance of
>> + * interrupt occurrence in
Hi,
On Sat, May 9, 2020 at 6:49 AM Wei Li wrote:
>
> PSTATE.I and PSTATE.D are very important for single-step working.
>
> Without disabling interrupt on local CPU, there is a chance of
> interrupt occurrence in the period of exception return and start of
> out-of-line single-step, that result
Hi Wei,
On Sun, 10 May 2020 05:41:57 +0800
Wei Li wrote:
> PSTATE.I and PSTATE.D are very important for single-step working.
>
> Without disabling interrupt on local CPU, there is a chance of
> interrupt occurrence in the period of exception return and start of
> out-of-line single-step, that
PSTATE.I and PSTATE.D are very important for single-step working.
Without disabling interrupt on local CPU, there is a chance of
interrupt occurrence in the period of exception return and start of
out-of-line single-step, that result in wrongly single stepping
into the interrupt handler. And if D
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