From 3e77efc7204407c5c8882bec42fdcaa88ef40a9b Mon Sep 17 00:00:00 2001
From: Srinivas Pokala <Pokala.Srinivas@ibm.com>
Date: Wed, 14 Dec 2022 06:31:50 +0100
Subject: cmd/internal/obj/s390x, runtime: fix breakpoint in s390x

Currently runtime.Breakpoint generates SIGSEGV in s390x.
The solution to this is add new asm instruction BRRK of
type FORMAT_E for the breakpoint exception.

Fixes #52103

Change-Id: I8358a56e428849a5d28d5ade141e1d7310bee084
Reviewed-on: https://go-review.googlesource.com/c/go/+/457456
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
---
 src/runtime/asm_s390x.s | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/runtime')

diff --git a/src/runtime/asm_s390x.s b/src/runtime/asm_s390x.s
index 334e1aa909..96b20f43a8 100644
--- a/src/runtime/asm_s390x.s
+++ b/src/runtime/asm_s390x.s
@@ -163,7 +163,7 @@ DATA	runtime·mainPC+0(SB)/8,$runtime·main(SB)
 GLOBL	runtime·mainPC(SB),RODATA,$8
 
 TEXT runtime·breakpoint(SB),NOSPLIT|NOFRAME,$0-0
-	MOVD	$0, 2(R0)
+	BRRK
 	RET
 
 TEXT runtime·asminit(SB),NOSPLIT|NOFRAME,$0-0
-- 
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