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riscv: handle debug.debugger_on_trap for fatal page faults
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Authored by mhorne on Dec 10 2020, 3:08 PM.

Details

Summary

Allows recovery or diagnosis of a fatal page fault before panicking the
system.

Test Plan

Setting debug.debugger_on_trap=1 and invoking an artificial NULL-dereference enters ddb.

Diff Detail

Repository
rS FreeBSD src repository - subversion
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

I believe this matches what other platforms do for this sysctl?

This revision is now accepted and ready to land.Dec 10 2020, 9:07 PM
In D27534#615888, @jhb wrote:

I believe this matches what other platforms do for this sysctl?

Certainly looks the same as arm64.

In D27534#615888, @jhb wrote:

I believe this matches what other platforms do for this sysctl?

Yep. With D27535 they should all behave consistently.