[Bug sim/16442] sims not target-async

["tromey at sourceware dot org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16442

Tom Tromey <tromey at sourceware dot org> changed:

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                 CC|                            |tromey at sourceware dot org

--- Comment #2 from Tom Tromey <tromey at sourceware dot org> ---
See also bug #7505.
I lean toward the RSP approach nowadays; we could remove remote-sim
entirely.  The only really tricky thing here, I think, is handling
the sim-specific gdbarch register remapping:

Method(
    comment="""
MAP a GDB RAW register number onto a simulator register number.  See
also include/...-sim.h.
""",
    type="int",
    name="register_sim_regno",
    params=[("int", "reg_nr")],
    predefault="legacy_register_sim_regno",
    invalid=False,
)

This is used in a few arches, search for set_gdbarch_register_sim_regno.

Probably the best approach is to just change the sims to use XML
register sets like everything else.

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