Re: [PATCH v2 5/9] arm64: Add call_break_hook() to early_brk64() for early kgdb

[Daniel Thompson]

On Tue, Apr 21, 2020 at 02:14:43PM -0700, Douglas Anderson wrote:
> In order to make early kgdb work properly we need early_brk64() to be
> able to call into it.  This is as easy as adding a call into
> call_break_hook() just like we do later in the normal brk_handler().
> 
> Once we do this we can let kgdb know that it can break into the
> debugger a little earlier (specifically when parsing early_param's).
> 
> NOTE: without this patch it turns out that arm64 can't do breakpoints
> even at dbg_late_init(), so if we decide something about this patch is
> wrong we might need to move dbg_late_init() a little later.
> 
> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Will Deacon <will@xxxxxxxxxx>

I haven't done any testing at this point (I'd hope to enable tests
for this in the test suite), however FWIW and just so you know I didn't
forget about this patch:

Reviewed-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx>


Daniel.