Messages in this thread | | | Date | Thu, 13 Feb 2020 10:10:58 +0000 | From | Will Deacon <> | Subject | Re: [RFC PATCH 0/2] arm64 kgdb fixes for single stepping |
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On Wed, Feb 12, 2020 at 09:11:29PM -0600, minyard@acm.org wrote: > I got a bug report about using kgdb on arm64, and it turns out it was > fairly broken. Patch 2 has a description of what was going on. I am > using a Marvell 8100 board. > > The following patches fix the problem, but probably not in the > best way. They are what I hacked out to show the problems. > > I am not quite sure how this will interact with kprobes and hardware > breakpoints which use the same code, but they would have been broken, > too, so this is not making them any worse.
This should all be handled by kgdb itself, not by changing the low-level debug exception handling. For example, the '&kgdb_step_hook' can take care of re-arming the step state machine and kgdb can also simply disable interrupts during the step if it doesn't want to step into the handler.
Will
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