From: Shenghou Ma <minux@golang.org>
Date: Fri, 6 May 2016 04:53:42 +0000 (-0400)
Subject: runtime: get randomness from AT_RANDOM AUXV on linux/mips64x
X-Git-Tag: go1.7beta1~305
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=2e32efc44ac86cce3bd0808e6049d8c9b0225ba8;p=gostls13.git

runtime: get randomness from AT_RANDOM AUXV on linux/mips64x

Fixes #15148.

Change-Id: If3b628f30521adeec1625689dbc98aaf4a9ec858
Reviewed-on: https://go-review.googlesource.com/22811
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
---

diff --git a/src/runtime/os_linux_mips64x.go b/src/runtime/os_linux_mips64x.go
index 92b5c82af7..8039b2fac9 100644
--- a/src/runtime/os_linux_mips64x.go
+++ b/src/runtime/os_linux_mips64x.go
@@ -9,6 +9,17 @@ package runtime
 
 var randomNumber uint32
 
+func archauxv(tag, val uintptr) {
+	switch tag {
+	case _AT_RANDOM:
+		// sysargs filled in startupRandomData, but that
+		// pointer may not be word aligned, so we must treat
+		// it as a byte array.
+		randomNumber = uint32(startupRandomData[4]) | uint32(startupRandomData[5])<<8 |
+			uint32(startupRandomData[6])<<16 | uint32(startupRandomData[7])<<24
+	}
+}
+
 //go:nosplit
 func cputicks() int64 {
 	// Currently cputicks() is used in blocking profiler and to seed fastrand1().
diff --git a/src/runtime/os_linux_noauxv.go b/src/runtime/os_linux_noauxv.go
index 0b46f594ce..22522dd803 100644
--- a/src/runtime/os_linux_noauxv.go
+++ b/src/runtime/os_linux_noauxv.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64,!arm,!arm64
+// +build !amd64,!arm,!arm64,!mips64,!mips64le
 
 package runtime