From 60ddae46be979fe90143673229697773f6d4a7b9 Mon Sep 17 00:00:00 2001
From: miod <miod@openbsd.org>
Date: Wed, 16 Oct 2024 18:40:52 +0000
Subject: [PATCH] Deliver SIGTRAP, rather than SIGEMT, for trap instructions
 which are neither debugger breakpoints nor compiler-generated divide by zero
 reports.

SIGEMT is a historical curiosity which makes no sense nowadays except on
PDP-11 and VAX hardware.

Discussed with imp@ and visa@ long ago.
---
 sys/arch/mips64/mips64/trap.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sys/arch/mips64/mips64/trap.c b/sys/arch/mips64/mips64/trap.c
index ff253cd3a02..1afcc27ee2f 100644
--- a/sys/arch/mips64/mips64/trap.c
+++ b/sys/arch/mips64/mips64/trap.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: trap.c,v 1.172 2024/09/20 02:00:46 jsg Exp $	*/
+/*	$OpenBSD: trap.c,v 1.173 2024/10/16 18:40:52 miod Exp $	*/
 
 /*
  * Copyright (c) 1988 University of Utah.
@@ -645,8 +645,8 @@ fault_common_no_miss:
 			sigexit(p, SIGABRT);
 			/* NOTREACHED */
 		} else {
-			signal = SIGEMT; /* Stuff it with something for now */
-			sicode = 0;
+			signal = SIGTRAP;
+			sicode = TRAP_BRKPT;
 		}
 		break;
 	    }