[RFC][PATCH 1/2] powerpc/booke: extend PTRACE_SINGLEBLOCK for BookE Branch Taken Debug
Scott Wood
scottwood at freescale.com
Wed Jul 10 02:53:45 EST 2013
On 07/05/2013 05:11:04 PM, James Yang wrote:
> This patch makes available the unmodified BookE branch taken debug
> exception through PTRACE_SINGLEBLOCK if the ptrace() addr parameter is
> set to 2.
This is hacky -- if we must retain the existing PTRACE_SINGLEBLOCK
semantics (which aren't actually documented anywhere AFAICT -- if the
details are meant to be implementation-defined, then don't we have some
freedom here to actually do what the hardware does, especially if we
can't find existing users?), then perhaps a new PTRACE_WHATEVER should
be defined.
At the very least, magic numbers should be given symbolic names.
-Scott
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