From ebd1eef41e656b47cc7ecf2ae8ec64b40da8136a Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Mon, 22 Sep 2008 13:47:59 -0700
Subject: [PATCH] implement spec: when main.main returns, the program exits

R=r
DELTA=9  (7 added, 2 deleted, 0 changed)
OCL=15628
CL=15643
---
 src/runtime/rt0_amd64.s | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/runtime/rt0_amd64.s b/src/runtime/rt0_amd64.s
index 9f354a71ae..35448e07cc 100644
--- a/src/runtime/rt0_amd64.s
+++ b/src/runtime/rt0_amd64.s
@@ -37,13 +37,14 @@ TEXT	_rt0_amd64(SB),7,$-8
 	CALL	schedinit(SB)
 
 	// create a new goroutine to start program
-
 	PUSHQ	$mainstart(SB)		// entry
 	PUSHQ	$16			// arg size
 	CALL	sys·newproc(SB)
-	CALL	mstart(SB)
 	POPQ	AX
 	POPQ	AX
+	
+	// start this M
+	CALL	mstart(SB)
 
 	CALL	notok(SB)		// never returns
 	RET
@@ -52,6 +53,10 @@ TEXT mainstart(SB),7,$0
 	CALL	main·init_function(SB)
 	CALL	initdone(SB)
 	CALL	main·main(SB)
+	PUSHQ	$0
+	CALL	sys·exit(SB)
+	POPQ	AX
+	CALL	notok(SB)
 	RET
 
 TEXT	sys·breakpoint(SB),7,$0
-- 
2.48.1