From: Ian Lance Taylor <iant@golang.org>
Date: Fri, 24 Aug 2018 18:44:55 +0000 (-0700)
Subject: runtime: mark sigInitIgnored nosplit
X-Git-Tag: go1.12beta1~1277
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=97f153528513e9a7ededf7e0aca7a4e30a3f4fe7;p=gostls13.git

runtime: mark sigInitIgnored nosplit

The sigInitIgnored function can be called by initsig before a shared
library is initialized, before the runtime is initialized.

Fixes #27183

Change-Id: I7073767938fc011879d47ea951d63a14d1cce878
Reviewed-on: https://go-review.googlesource.com/131277
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
---

diff --git a/src/runtime/sigqueue.go b/src/runtime/sigqueue.go
index 9f53240954..a425433b20 100644
--- a/src/runtime/sigqueue.go
+++ b/src/runtime/sigqueue.go
@@ -237,8 +237,10 @@ func signal_ignore(s uint32) {
 	atomic.Store(&sig.ignored[s/32], i)
 }
 
-// sigInitIgnored marks the signal as already ignored.  This is called at
-// program start by siginit.
+// sigInitIgnored marks the signal as already ignored. This is called at
+// program start by initsig. In a shared library initsig is called by
+// libpreinit, so the runtime may not be initialized yet.
+//go:nosplit
 func sigInitIgnored(s uint32) {
 	i := sig.ignored[s/32]
 	i |= 1 << (s & 31)