On 06.12.2019 06:17, Kamil Rytarowski wrote:
> I have implemented l_private accessor in ptrace(2).
>
> By default this uses l_private from the lwp struct.
>
> PT_SET_LWP_PRIVATE uses lwp_setprivate() directly and this call
> abstracts internally MI and MD code.
>
> The PT_SET_LWP_PRIVATE operation uses by default l_private from the
> struct lwp, however whenever appropriate, picks MD logic that grabs this
> value from a MD filed (register or pcb).
>
> MD code is implemented for:
> - sparc, sparc64
> - alpha
> - hppa
> - powerpc
> - sh3
>
> There is included compat32 support and ATF tests.
>
> http://netbsd.org/~kamil/patch-00202-PT_GET_LWP_PRIVATE.txt
>
> This ptrace operation is inspired by PTRACE_GET_THREAD_AREA /
> PTRACE_SET_THREAD_AREA from linux.
>
> Please review.
>
> After merging this, I will add an entry in man-page ptrace(2) and
> implement core(5) generation of PT_GET_LWP_PRIVATE for each LWP within a
> process.
>
Actually, we can go better here and in one go remove one of the issues
in our current ptrace(2) API regarding legacy operation PT_LWPINFO (it
is obsoleted by PT_GET_SIGINFO and confusing with a different PT_LWPINFO
found in FreeBSD).
I will come up with another and better patch.
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