[PATCH] RISC-V: Don't use ps_get_thread_area in libthread_db (bug 23402)

[Jim Wilson]

On Thu, Jul 12, 2018 at 12:24 AM, Andreas Schwab <schwab@suse.de> wrote:
> Since RISC-V stores the thread pointer in a general register libthread_db
> can just ask the debugger for the register contents instead of trying to
> call ps_get_thread_area.  This enables thread debugging in gdb.
>
>         * sysdeps/riscv/nptl/tls.h (DB_THREAD_SELF): Use REGISTER instead
>         of CONST_THREAD_AREA.

This looks good to me, just comparing with other glibc ports that have
tp in a register.  I'm not listed as one of the RISC-V port
maintainers though, but not sure if that matters.  Unfortunately, I
wasn't expecting to need glibc patches as part of my gdb porting
effort, so I don't have an easy way to test this myself at the moment.
I will have to extend my gdb testing setup to include support for
glibc patches.

Jim