Re: [PATCH 2/3] perf tools: allow user to specify hardware breakpointbp_len

From: H. Peter Anvin
Date: Sun Apr 28 2013 - 01:51:34 EST

On 04/27/2013 09:58 AM, Oleg Nesterov wrote:
> Stupid question... So X86_FEATURE_BPEXT only works for r/w? I mean, it
> doesn't allow to specify the mask for an execute breakpoint?

x86 execute breakpoints in general are only a single byte, which has to
be the first byte of the instruction.


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