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From: Justin Hibbits <jhibbits@FreeBSD.org>
Date: Tue, 10 Apr 2018 21:14:55 +0000 (UTC)
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Subject: svn commit: r332393 - head/sys/powerpc/powerpc
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Author: jhibbits
Date: Tue Apr 10 21:14:54 2018
New Revision: 332393
URL: https://svnweb.freebsd.org/changeset/base/332393

Log:
  Reenter KDB on fault on powerpc, instead of panicking
  
  Most other architectures already re-enter KDB on faults, powerpc and mips
  are the only outliers.  Correct this for powerpc, so that now bad addresses
  can be handled gracefully instead of panicking.

Modified:
  head/sys/powerpc/powerpc/trap.c

Modified: head/sys/powerpc/powerpc/trap.c
==============================================================================
--- head/sys/powerpc/powerpc/trap.c	Tue Apr 10 20:31:25 2018	(r332392)
+++ head/sys/powerpc/powerpc/trap.c	Tue Apr 10 21:14:54 2018	(r332393)
@@ -208,6 +208,13 @@ trap(struct trapframe *frame)
 
 	VM_CNT_INC(v_trap);
 
+#ifdef KDB
+	if (kdb_active) {
+		kdb_reenter();
+		return;
+	}
+#endif
+
 	td = curthread;
 	p = td->td_proc;