[RFC PATCH] uprobes: copy to user-space xol page with proper cache flushing

[davem@davemloft.net (David Miller)]

From: Victor Kamensky <victor.kamensky@linaro.org>
Date: Tue, 15 Apr 2014 18:42:39 -0700

> On 15 April 2014 12:53, David Miller <davem@davemloft.net> wrote:
>> From: David Long <dave.long@linaro.org>
>> Date: Tue, 15 Apr 2014 15:39:18 -0400
>>
>>> Yes, I have that coded for 14 out of 24 architectures (the easy
>>> ones). The remaining ones need more work.  Some may prove problematic.
>>> The whole approach could yet prove impractical.  More recent suggested
>>> approaches may be better too (or Linus's relatively simple change).
>>
>> BTW, another reason perhaps to write directly to userspace and have
>> a uprobes_*() specific interface is that you'll only need to do
>> 3 architectures, the ones that support uprobes.
>>
>> That way, this is just part of what every arch needs to implement in
>> order to support uprobes.
> 
> David, Russell, I hope I correctly understood your idea of writing
> directly into user space. Please check patch below.

Just FYI, your mail client corrupted the patch, at a minimum chopping
up long lines.