From 20a053611b2ac6cdd760fd3d391e4f7ae2d72a77 Mon Sep 17 00:00:00 2001
From: Michael Hudson-Doyle <[email protected]>
Date: Fri, 13 Nov 2015 08:55:44 +1300
Subject: [PATCH 43/63] [release-branch.go1.5] runtime: ignore rt_sigaction
 error if it is for SIGRTMAX

A forward port of https://codereview.appspot.com/124900043/ which somehow
got lost somewhere.

Fixes #13024

Change-Id: Iab128899e65c51d90f6704e3e1b2fc9326e3a1c2
Reviewed-on: https://go-review.googlesource.com/16853
Reviewed-by: Russ Cox <[email protected]>
Reviewed-on: https://go-review.googlesource.com/16986
Run-TryBot: Austin Clements <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
---
 src/runtime/os1_linux.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/runtime/os1_linux.go b/src/runtime/os1_linux.go
index c23dc30..1cad8f7 100644
--- a/src/runtime/os1_linux.go
+++ b/src/runtime/os1_linux.go
@@ -293,7 +293,8 @@ func setsig(i int32, fn uintptr, restart bool) {
 		fn = funcPC(sigtramp)
 	}
 	sa.sa_handler = fn
-	if rt_sigaction(uintptr(i), &sa, nil, unsafe.Sizeof(sa.sa_mask)) != 0 {
+	// Qemu rejects rt_sigaction of SIGRTMAX (64).
+	if rt_sigaction(uintptr(i), &sa, nil, unsafe.Sizeof(sa.sa_mask)) != 0 && i != 64 {
 		throw("rt_sigaction failure")
 	}
 }
-- 
2.6.1