libc: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

12 files changed, 29 insertions, 5 deletions

diff --git a/lib/libc/arm/_fpmath.h b/lib/libc/arm/_fpmath.h
index 28bcb4b4ffde..f5ae2f95ad28 100644
--- a/lib/libc/arm/_fpmath.h
+++ b/lib/libc/arm/_fpmath.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
  * All rights reserved.
  *
diff --git a/lib/libc/arm/aeabi/aeabi_atexit.c b/lib/libc/arm/aeabi/aeabi_atexit.c
index 8502595385df..a33ca8f78af4 100644
--- a/lib/libc/arm/aeabi/aeabi_atexit.c
+++ b/lib/libc/arm/aeabi/aeabi_atexit.c
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (C) 2012 Andrew Turner
  * All rights reserved.
  *
diff --git a/lib/libc/arm/aeabi/aeabi_double.c b/lib/libc/arm/aeabi/aeabi_double.c
index a69e8a74b3cc..0ec3e625c25c 100644
--- a/lib/libc/arm/aeabi/aeabi_double.c
+++ b/lib/libc/arm/aeabi/aeabi_double.c
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (C) 2012 Andrew Turner
  * All rights reserved.
  *
diff --git a/lib/libc/arm/aeabi/aeabi_float.c b/lib/libc/arm/aeabi/aeabi_float.c
index 2e93594c2105..62f78495e844 100644
--- a/lib/libc/arm/aeabi/aeabi_float.c
+++ b/lib/libc/arm/aeabi/aeabi_float.c
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (C) 2012 Andrew Turner
  * All rights reserved.
  *
diff --git a/lib/libc/arm/aeabi/aeabi_unwind_cpp.c b/lib/libc/arm/aeabi/aeabi_unwind_cpp.c
index c07cbbde275b..78b77c351cdb 100644
--- a/lib/libc/arm/aeabi/aeabi_unwind_cpp.c
+++ b/lib/libc/arm/aeabi/aeabi_unwind_cpp.c
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (C) 2011 Andrew Turner
  * All rights reserved.
  *
diff --git a/lib/libc/arm/gen/_set_tp.c b/lib/libc/arm/gen/_set_tp.c
index 2332f599a919..d0801d7444ba 100644
--- a/lib/libc/arm/gen/_set_tp.c
+++ b/lib/libc/arm/gen/_set_tp.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2004 Doug Rabson
  * All rights reserved.
  *
diff --git a/lib/libc/arm/gen/arm_initfini.c b/lib/libc/arm/gen/arm_initfini.c
index 9def8c8dfbcb..4dabe6743c9f 100644
--- a/lib/libc/arm/gen/arm_initfini.c
+++ b/lib/libc/arm/gen/arm_initfini.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-NetBSD
+ *
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
  * Copyright (c) 2013 Andrew Turner
  * All rights reserved.
diff --git a/lib/libc/arm/gen/flt_rounds.c b/lib/libc/arm/gen/flt_rounds.c
index 86509d233231..17ca3fb9aa90 100644
--- a/lib/libc/arm/gen/flt_rounds.c
+++ b/lib/libc/arm/gen/flt_rounds.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2012 Ian Lepore <freebsd@damnhippie.dyndns.org>
  * All rights reserved.
  *
diff --git a/lib/libc/arm/gen/getcontextx.c b/lib/libc/arm/gen/getcontextx.c
index 3092e2818e92..38a9a8abfe11 100644
--- a/lib/libc/arm/gen/getcontextx.c
+++ b/lib/libc/arm/gen/getcontextx.c
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2017 Michal Meloun <mmel@FreeBSD.org>
  * All rights reserved.
  *
diff --git a/lib/libc/arm/gen/makecontext.c b/lib/libc/arm/gen/makecontext.c
index 4b0f92d78f77..421cf0dd3ed2 100644
--- a/lib/libc/arm/gen/makecontext.c
+++ b/lib/libc/arm/gen/makecontext.c
@@ -1,6 +1,8 @@
 /*	$NetBSD: makecontext.c,v 1.2 2003/01/18 11:06:24 thorpej Exp $	*/
 
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-NetBSD
+ *
  * Copyright (c) 2001 The NetBSD Foundation, Inc.
  * All rights reserved.
  *
diff --git a/lib/libc/arm/gen/signalcontext.c b/lib/libc/arm/gen/signalcontext.c
index bb9a54dbe115..7d17733c3c2c 100644
--- a/lib/libc/arm/gen/signalcontext.c
+++ b/lib/libc/arm/gen/signalcontext.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2004 Olivier Houchard
  * All rights reserved.
  *
diff --git a/lib/libc/arm/sys/__vdso_gettc.c b/lib/libc/arm/sys/__vdso_gettc.c
index 9f8631df5806..eff19118185b 100644
--- a/lib/libc/arm/sys/__vdso_gettc.c
+++ b/lib/libc/arm/sys/__vdso_gettc.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2015 The FreeBSD Foundation
  *
  * This software was developed by Konstantin Belousov