[legal] Relicense files under GPL2_OR_LATER_OR_UBDL

These files cannot be automatically relicensed by util/relicense.pl
since they either contain unusual but trivial contributions (such as
the addition of __nonnull function attributes), or contain lines
dating back to the initial git revision (and so require manual
knowledge of the code's origin).

Signed-off-by: Michael Brown <mcb30@ipxe.org>

106 files changed, 302 insertions, 114 deletions

diff --git a/src/arch/i386/core/patch_cf.S b/src/arch/i386/core/patch_cf.S
index 97a62f49..4365563f 100644
--- a/src/arch/i386/core/patch_cf.S
+++ b/src/arch/i386/core/patch_cf.S
@@ -14,9 +14,13 @@
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER )
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
 
 	.text
 	.arch i386
diff --git a/src/arch/i386/core/relocate.c b/src/arch/i386/core/relocate.c
index 5fbf2d2c..54ad387e 100644
--- a/src/arch/i386/core/relocate.c
+++ b/src/arch/i386/core/relocate.c
@@ -8,7 +8,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /*
  * The linker passes in the symbol _max_align, which is the alignment
diff --git a/src/arch/i386/firmware/pcbios/bios_console.c b/src/arch/i386/firmware/pcbios/bios_console.c
index bd73838b..7b2f8ade 100644
--- a/src/arch/i386/firmware/pcbios/bios_console.c
+++ b/src/arch/i386/firmware/pcbios/bios_console.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <assert.h>
 #include <realmode.h>
diff --git a/src/arch/i386/firmware/pcbios/e820mangler.S b/src/arch/i386/firmware/pcbios/e820mangler.S
index cea17ef8..d5d97b48 100644
--- a/src/arch/i386/firmware/pcbios/e820mangler.S
+++ b/src/arch/i386/firmware/pcbios/e820mangler.S
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER )
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
 
 	.text
 	.arch i386
diff --git a/src/arch/i386/firmware/pcbios/memmap.c b/src/arch/i386/firmware/pcbios/memmap.c
index 0937a7ce..bcacecd6 100644
--- a/src/arch/i386/firmware/pcbios/memmap.c
+++ b/src/arch/i386/firmware/pcbios/memmap.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <errno.h>
diff --git a/src/arch/i386/image/multiboot.c b/src/arch/i386/image/multiboot.c
index 86b0bc12..0c85df70 100644
--- a/src/arch/i386/image/multiboot.c
+++ b/src/arch/i386/image/multiboot.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /**
  * @file
diff --git a/src/arch/i386/include/bits/byteswap.h b/src/arch/i386/include/bits/byteswap.h
index 0d9cb967..53b6a454 100644
--- a/src/arch/i386/include/bits/byteswap.h
+++ b/src/arch/i386/include/bits/byteswap.h
@@ -9,7 +9,7 @@
 
 #include <stdint.h>
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 static inline __attribute__ (( always_inline, const )) uint16_t
 __bswap_variable_16 ( uint16_t x ) {
diff --git a/src/arch/i386/include/bits/stdint.h b/src/arch/i386/include/bits/stdint.h
index 8edf1319..fe1f9946 100644
--- a/src/arch/i386/include/bits/stdint.h
+++ b/src/arch/i386/include/bits/stdint.h
@@ -1,7 +1,7 @@
 #ifndef _BITS_STDINT_H
 #define _BITS_STDINT_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 typedef __SIZE_TYPE__		size_t;
 typedef signed long		ssize_t;
diff --git a/src/arch/i386/include/bzimage.h b/src/arch/i386/include/bzimage.h
index 7e42e318..4933ce5b 100644
--- a/src/arch/i386/include/bzimage.h
+++ b/src/arch/i386/include/bzimage.h
@@ -1,7 +1,7 @@
 #ifndef _BZIMAGE_H
 #define _BZIMAGE_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 
diff --git a/src/arch/i386/include/efi/ipxe/dhcp_arch.h b/src/arch/i386/include/efi/ipxe/dhcp_arch.h
index 18417721..c17c1ea5 100644
--- a/src/arch/i386/include/efi/ipxe/dhcp_arch.h
+++ b/src/arch/i386/include/efi/ipxe/dhcp_arch.h
@@ -4,7 +4,7 @@
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
+ * License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,7 +13,12 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
 #ifndef _DHCP_ARCH_H
@@ -24,7 +29,7 @@
  * Architecture-specific DHCP options
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <ipxe/dhcp.h>
 
diff --git a/src/arch/i386/include/librm.h b/src/arch/i386/include/librm.h
index c8ba72b5..c37373dd 100644
--- a/src/arch/i386/include/librm.h
+++ b/src/arch/i386/include/librm.h
@@ -1,7 +1,7 @@
 #ifndef LIBRM_H
 #define LIBRM_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /* Segment selectors as used in our protected-mode GDTs.
  *
diff --git a/src/arch/i386/include/limits.h b/src/arch/i386/include/limits.h
index 031b6c57..bb48b75a 100644
--- a/src/arch/i386/include/limits.h
+++ b/src/arch/i386/include/limits.h
@@ -1,7 +1,7 @@
 #ifndef LIMITS_H
 #define LIMITS_H	1
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /* Number of bits in a `char' */
 #define CHAR_BIT	8
diff --git a/src/arch/i386/include/pcbios/ipxe/dhcp_arch.h b/src/arch/i386/include/pcbios/ipxe/dhcp_arch.h
index a36d9cfa..e07e4c19 100644
--- a/src/arch/i386/include/pcbios/ipxe/dhcp_arch.h
+++ b/src/arch/i386/include/pcbios/ipxe/dhcp_arch.h
@@ -4,7 +4,7 @@
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
+ * License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,7 +13,12 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
 #ifndef _DHCP_ARCH_H
@@ -24,7 +29,7 @@
  * Architecture-specific DHCP options
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <ipxe/dhcp.h>
 
diff --git a/src/arch/i386/include/pxe.h b/src/arch/i386/include/pxe.h
index b95b0cce..66d75268 100644
--- a/src/arch/i386/include/pxe.h
+++ b/src/arch/i386/include/pxe.h
@@ -1,7 +1,7 @@
 #ifndef PXE_H
 #define PXE_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include "pxe_types.h"
 #include "pxe_error.h"
diff --git a/src/arch/i386/include/pxe_call.h b/src/arch/i386/include/pxe_call.h
index 45af4654..cbd54831 100644
--- a/src/arch/i386/include/pxe_call.h
+++ b/src/arch/i386/include/pxe_call.h
@@ -6,7 +6,7 @@
  * PXE API entry point
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <pxe_api.h>
 #include <realmode.h>
diff --git a/src/arch/i386/include/registers.h b/src/arch/i386/include/registers.h
index 06d23652..d9aa3c37 100644
--- a/src/arch/i386/include/registers.h
+++ b/src/arch/i386/include/registers.h
@@ -10,7 +10,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 
diff --git a/src/arch/i386/interface/pcbios/bios_timer.c b/src/arch/i386/interface/pcbios/bios_timer.c
index 65bbf9e0..3299c9aa 100644
--- a/src/arch/i386/interface/pcbios/bios_timer.c
+++ b/src/arch/i386/interface/pcbios/bios_timer.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** @file
  *
diff --git a/src/arch/i386/interface/pxe/pxe_call.c b/src/arch/i386/interface/pxe/pxe_call.c
index 657d47b6..9703733c 100644
--- a/src/arch/i386/interface/pxe/pxe_call.c
+++ b/src/arch/i386/interface/pxe/pxe_call.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <ipxe/uaccess.h>
 #include <ipxe/init.h>
diff --git a/src/arch/i386/interface/pxe/pxe_preboot.c b/src/arch/i386/interface/pxe/pxe_preboot.c
index 534352b2..7cb82f74 100644
--- a/src/arch/i386/interface/pxe/pxe_preboot.c
+++ b/src/arch/i386/interface/pxe/pxe_preboot.c
@@ -22,9 +22,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <string.h>
diff --git a/src/arch/i386/interface/pxe/pxe_tftp.c b/src/arch/i386/interface/pxe/pxe_tftp.c
index 46119c9b..9ec3e96e 100644
--- a/src/arch/i386/interface/pxe/pxe_tftp.c
+++ b/src/arch/i386/interface/pxe/pxe_tftp.c
@@ -21,9 +21,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/src/arch/i386/interface/pxe/pxe_undi.c b/src/arch/i386/interface/pxe/pxe_undi.c
index 29e586ed..2eb68178 100644
--- a/src/arch/i386/interface/pxe/pxe_undi.c
+++ b/src/arch/i386/interface/pxe/pxe_undi.c
@@ -21,9 +21,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stdio.h>
diff --git a/src/arch/i386/prefix/libprefix.S b/src/arch/i386/prefix/libprefix.S
index 5a2dff57..00ce3fb9 100644
--- a/src/arch/i386/prefix/libprefix.S
+++ b/src/arch/i386/prefix/libprefix.S
@@ -16,9 +16,13 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
  *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
+ *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER )
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
 
 	.arch i386
 
diff --git a/src/arch/i386/prefix/romprefix.S b/src/arch/i386/prefix/romprefix.S
index cac8075e..0ad6e16d 100644
--- a/src/arch/i386/prefix/romprefix.S
+++ b/src/arch/i386/prefix/romprefix.S
@@ -6,7 +6,7 @@
  * table so using a noticeable amount of stack space is a no-no.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER )
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
 
 #include <config/general.h>
 #include <config/branding.h>
diff --git a/src/arch/i386/prefix/undiloader.S b/src/arch/i386/prefix/undiloader.S
index 74bb5904..5cace44b 100644
--- a/src/arch/i386/prefix/undiloader.S
+++ b/src/arch/i386/prefix/undiloader.S
@@ -1,4 +1,4 @@
-FILE_LICENCE ( GPL2_OR_LATER )
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
 
 	.text
 	.code16
diff --git a/src/arch/i386/transitions/librm.S b/src/arch/i386/transitions/librm.S
index 2e447b03..863e2241 100644
--- a/src/arch/i386/transitions/librm.S
+++ b/src/arch/i386/transitions/librm.S
@@ -5,7 +5,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER )
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
 
 /* Drag in local definitions */
 #include "librm.h"
diff --git a/src/arch/i386/transitions/librm_mgmt.c b/src/arch/i386/transitions/librm_mgmt.c
index cc4765de..5eab7bed 100644
--- a/src/arch/i386/transitions/librm_mgmt.c
+++ b/src/arch/i386/transitions/librm_mgmt.c
@@ -5,7 +5,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/profile.h>
diff --git a/src/arch/x86/core/x86_tcpip.c b/src/arch/x86/core/x86_tcpip.c
index 8a4ce515..88042f5f 100644
--- a/src/arch/x86/core/x86_tcpip.c
+++ b/src/arch/x86/core/x86_tcpip.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** @file
  *
diff --git a/src/arch/x86/include/bits/errfile.h b/src/arch/x86/include/bits/errfile.h
index 5fce86af..9ca849d5 100644
--- a/src/arch/x86/include/bits/errfile.h
+++ b/src/arch/x86/include/bits/errfile.h
@@ -1,7 +1,7 @@
 #ifndef _BITS_ERRFILE_H
 #define _BITS_ERRFILE_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /**
  * @addtogroup errfile Error file identifiers
diff --git a/src/arch/x86/include/bits/string.h b/src/arch/x86/include/bits/string.h
index b6a422ec..c26fe30d 100644
--- a/src/arch/x86/include/bits/string.h
+++ b/src/arch/x86/include/bits/string.h
@@ -18,9 +18,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** @file
  *
diff --git a/src/arch/x86/include/linux/ipxe/dhcp_arch.h b/src/arch/x86/include/linux/ipxe/dhcp_arch.h
index e83fd9d8..d60905f2 100644
--- a/src/arch/x86/include/linux/ipxe/dhcp_arch.h
+++ b/src/arch/x86/include/linux/ipxe/dhcp_arch.h
@@ -4,7 +4,7 @@
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
+ * License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,7 +13,12 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
 #ifndef _LINUX_DHCP_ARCH_H
@@ -24,7 +29,7 @@
  * Architecture-specific DHCP options
  */
 
-FILE_LICENCE(GPL2_OR_LATER);
+FILE_LICENCE(GPL2_OR_LATER_OR_UBDL);
 
 #include <ipxe/dhcp.h>
 
diff --git a/src/arch/x86/include/pic8259.h b/src/arch/x86/include/pic8259.h
index 0d02266d..f02e6290 100644
--- a/src/arch/x86/include/pic8259.h
+++ b/src/arch/x86/include/pic8259.h
@@ -4,7 +4,7 @@
  * Initially written by Michael Brown (mcb30).
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #ifndef PIC8259_H
 #define PIC8259_H
diff --git a/src/arch/x86_64/include/efi/ipxe/dhcp_arch.h b/src/arch/x86_64/include/efi/ipxe/dhcp_arch.h
index 9a4790fd..6511c1ad 100644
--- a/src/arch/x86_64/include/efi/ipxe/dhcp_arch.h
+++ b/src/arch/x86_64/include/efi/ipxe/dhcp_arch.h
@@ -4,7 +4,7 @@
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
+ * License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,7 +13,12 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
 #ifndef _DHCP_ARCH_H
@@ -24,7 +29,7 @@
  * Architecture-specific DHCP options
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <ipxe/dhcp.h>
 
diff --git a/src/config/colour.h b/src/config/colour.h
index 57d20c1d..98198f12 100644
--- a/src/config/colour.h
+++ b/src/config/colour.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #define COLOR_NORMAL_FG		COLOR_WHITE
 #define COLOR_NORMAL_BG		COLOR_BLUE
diff --git a/src/config/config.c b/src/config/config.c
index a84f78ac..346f79bf 100644
--- a/src/config/config.c
+++ b/src/config/config.c
@@ -13,9 +13,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <config/general.h>
 #include <config/console.h>
diff --git a/src/config/config_romprefix.c b/src/config/config_romprefix.c
index 7a133641..ad6f31f8 100644
--- a/src/config/config_romprefix.c
+++ b/src/config/config_romprefix.c
@@ -13,9 +13,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <config/general.h>
 
diff --git a/src/config/defaults/pcbios.h b/src/config/defaults/pcbios.h
index ef20c360..425e4a0d 100644
--- a/src/config/defaults/pcbios.h
+++ b/src/config/defaults/pcbios.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #define UACCESS_LIBRM
 #define IOAPI_X86
diff --git a/src/config/general.h b/src/config/general.h
index 8ea10c4b..65c1f855 100644
--- a/src/config/general.h
+++ b/src/config/general.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <config/defaults.h>
 
diff --git a/src/core/bitmap.c b/src/core/bitmap.c
index 0d115232..2aac3387 100644
--- a/src/core/bitmap.c
+++ b/src/core/bitmap.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <errno.h>
 #include <ipxe/bitmap.h>
diff --git a/src/core/cwuri.c b/src/core/cwuri.c
index 5865552a..612f0b17 100644
--- a/src/core/cwuri.c
+++ b/src/core/cwuri.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stddef.h>
 #include <ipxe/uri.h>
diff --git a/src/core/downloader.c b/src/core/downloader.c
index ec69db6b..5ec6b3b7 100644
--- a/src/core/downloader.c
+++ b/src/core/downloader.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdlib.h>
 #include <errno.h>
diff --git a/src/core/image.c b/src/core/image.c
index ec448023..365e4d80 100644
--- a/src/core/image.c
+++ b/src/core/image.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stddef.h>
 #include <string.h>
diff --git a/src/core/main.c b/src/core/main.c
index db09e4c3..97394d71 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -12,7 +12,7 @@ Literature dealing with the network protocols:
 
 **************************************************************************/
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stddef.h>
 #include <stdio.h>
diff --git a/src/core/posix_io.c b/src/core/posix_io.c
index 8460d0f5..35b52bee 100644
--- a/src/core/posix_io.c
+++ b/src/core/posix_io.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdlib.h>
 #include <string.h>
diff --git a/src/core/refcnt.c b/src/core/refcnt.c
index 68a86120..47c975a0 100644
--- a/src/core/refcnt.c
+++ b/src/core/refcnt.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdlib.h>
 #include <ipxe/refcnt.h>
diff --git a/src/core/resolv.c b/src/core/resolv.c
index d59a8c0a..1e3182b0 100644
--- a/src/core/resolv.c
+++ b/src/core/resolv.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/src/core/timer.c b/src/core/timer.c
index 18c2b284..dbd89f12 100644
--- a/src/core/timer.c
+++ b/src/core/timer.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <unistd.h>
 
diff --git a/src/core/uri.c b/src/core/uri.c
index d60f5d2b..3b5f270f 100644
--- a/src/core/uri.c
+++ b/src/core/uri.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** @file
  *
diff --git a/src/core/vsprintf.c b/src/core/vsprintf.c
index 54811b11..cb3bec5d 100644
--- a/src/core/vsprintf.c
+++ b/src/core/vsprintf.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stddef.h>
 #include <stdarg.h>
diff --git a/src/drivers/bus/pci.c b/src/drivers/bus/pci.c
index f861d452..7832ef06 100644
--- a/src/drivers/bus/pci.c
+++ b/src/drivers/bus/pci.c
@@ -18,9 +18,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/src/drivers/bus/pciextra.c b/src/drivers/bus/pciextra.c
index c4417e0c..042f7561 100644
--- a/src/drivers/bus/pciextra.c
+++ b/src/drivers/bus/pciextra.c
@@ -1,4 +1,4 @@
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/pci.h>
diff --git a/src/hci/editstring.c b/src/hci/editstring.c
index 5f6f04d5..8cbce076 100644
--- a/src/hci/editstring.c
+++ b/src/hci/editstring.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <assert.h>
 #include <string.h>
diff --git a/src/hci/tui/menu_ui.c b/src/hci/tui/menu_ui.c
index 0a9566de..13bdf65e 100644
--- a/src/hci/tui/menu_ui.c
+++ b/src/hci/tui/menu_ui.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** @file
  *
diff --git a/src/image/embedded.c b/src/image/embedded.c
index 6358378f..48dd8685 100644
--- a/src/image/embedded.c
+++ b/src/image/embedded.c
@@ -6,7 +6,7 @@
  * fetching over the network.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <string.h>
 #include <ipxe/image.h>
diff --git a/src/include/curses.h b/src/include/curses.h
index f16f9d7d..04060fe2 100644
--- a/src/include/curses.h
+++ b/src/include/curses.h
@@ -11,7 +11,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #undef  ERR
 #define ERR	(-1)
diff --git a/src/include/hci/ifmgmt_cmd.h b/src/include/hci/ifmgmt_cmd.h
index 913b911d..5debf85c 100644
--- a/src/include/hci/ifmgmt_cmd.h
+++ b/src/include/hci/ifmgmt_cmd.h
@@ -15,12 +15,16 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
 #ifndef _IFMGMT_CMD_H
 #define _IFMGMT_CMD_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <ipxe/parseopt.h>
 
diff --git a/src/include/ipxe/arp.h b/src/include/ipxe/arp.h
index e30ae6b7..93195010 100644
--- a/src/include/ipxe/arp.h
+++ b/src/include/ipxe/arp.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <ipxe/tables.h>
 #include <ipxe/netdevice.h>
diff --git a/src/include/ipxe/bitmap.h b/src/include/ipxe/bitmap.h
index b18584c1..38aca694 100644
--- a/src/include/ipxe/bitmap.h
+++ b/src/include/ipxe/bitmap.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stddef.h>
diff --git a/src/include/ipxe/blockdev.h b/src/include/ipxe/blockdev.h
index 9f0a9f78..418c4300 100644
--- a/src/include/ipxe/blockdev.h
+++ b/src/include/ipxe/blockdev.h
@@ -8,7 +8,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/uaccess.h>
diff --git a/src/include/ipxe/crc32.h b/src/include/ipxe/crc32.h
index 38ac1b31..30d2fe66 100644
--- a/src/include/ipxe/crc32.h
+++ b/src/include/ipxe/crc32.h
@@ -1,7 +1,7 @@
 #ifndef _IPXE_CRC32_H
 #define _IPXE_CRC32_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 
diff --git a/src/include/ipxe/crypto.h b/src/include/ipxe/crypto.h
index 3eda5ec6..fc0d8b22 100644
--- a/src/include/ipxe/crypto.h
+++ b/src/include/ipxe/crypto.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stddef.h>
diff --git a/src/include/ipxe/dhcp.h b/src/include/ipxe/dhcp.h
index a35794bd..a11db349 100644
--- a/src/include/ipxe/dhcp.h
+++ b/src/include/ipxe/dhcp.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stdarg.h>
diff --git a/src/include/ipxe/editbox.h b/src/include/ipxe/editbox.h
index 9122dbbf..2c70e0b6 100644
--- a/src/include/ipxe/editbox.h
+++ b/src/include/ipxe/editbox.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <curses.h>
 #include <ipxe/editstring.h>
diff --git a/src/include/ipxe/editstring.h b/src/include/ipxe/editstring.h
index 2ef546a6..a00a8ada 100644
--- a/src/include/ipxe/editstring.h
+++ b/src/include/ipxe/editstring.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** An editable string */
 struct edit_string {
diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h
index 353d8ca3..a71a6035 100644
--- a/src/include/ipxe/errfile.h
+++ b/src/include/ipxe/errfile.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <bits/errfile.h>
 
diff --git a/src/include/ipxe/ethernet.h b/src/include/ipxe/ethernet.h
index d1263d7c..dd04e00c 100644
--- a/src/include/ipxe/ethernet.h
+++ b/src/include/ipxe/ethernet.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/netdevice.h>
diff --git a/src/include/ipxe/features.h b/src/include/ipxe/features.h
index d8b8b218..e86a2d22 100644
--- a/src/include/ipxe/features.h
+++ b/src/include/ipxe/features.h
@@ -11,7 +11,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /**
  * @defgroup featurecat Feature categories
diff --git a/src/include/ipxe/fragment.h b/src/include/ipxe/fragment.h
index e311ad1e..0069e5e0 100644
--- a/src/include/ipxe/fragment.h
+++ b/src/include/ipxe/fragment.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/list.h>
diff --git a/src/include/ipxe/http.h b/src/include/ipxe/http.h
index cf8c0c7f..421598b5 100644
--- a/src/include/ipxe/http.h
+++ b/src/include/ipxe/http.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** HTTP default port */
 #define HTTP_PORT 80
diff --git a/src/include/ipxe/if_ether.h b/src/include/ipxe/if_ether.h
index a7e23734..58d91b97 100644
--- a/src/include/ipxe/if_ether.h
+++ b/src/include/ipxe/if_ether.h
@@ -1,7 +1,7 @@
 #ifndef	_IPXE_IF_ETHER_H
 #define	_IPXE_IF_ETHER_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 
diff --git a/src/include/ipxe/in.h b/src/include/ipxe/in.h
index de96ca22..75f23123 100644
--- a/src/include/ipxe/in.h
+++ b/src/include/ipxe/in.h
@@ -1,7 +1,7 @@
 #ifndef	_IPXE_IN_H
 #define	_IPXE_IN_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/socket.h>
diff --git a/src/include/ipxe/init.h b/src/include/ipxe/init.h
index 19c5925b..e051dc6c 100644
--- a/src/include/ipxe/init.h
+++ b/src/include/ipxe/init.h
@@ -1,7 +1,7 @@
 #ifndef _IPXE_INIT_H
 #define _IPXE_INIT_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <ipxe/tables.h>
 
diff --git a/src/include/ipxe/io.h b/src/include/ipxe/io.h
index 29ccfd1f..af767915 100644
--- a/src/include/ipxe/io.h
+++ b/src/include/ipxe/io.h
@@ -16,7 +16,7 @@
  * the address parameter.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/api.h>
diff --git a/src/include/ipxe/iobuf.h b/src/include/ipxe/iobuf.h
index d7c10ab4..27d285d4 100644
--- a/src/include/ipxe/iobuf.h
+++ b/src/include/ipxe/iobuf.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <assert.h>
diff --git a/src/include/ipxe/ip.h b/src/include/ipxe/ip.h
index 1a93a552..285be6dc 100644
--- a/src/include/ipxe/ip.h
+++ b/src/include/ipxe/ip.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/in.h>
diff --git a/src/include/ipxe/isa_ids.h b/src/include/ipxe/isa_ids.h
index 1faf1148..d815bda3 100644
--- a/src/include/ipxe/isa_ids.h
+++ b/src/include/ipxe/isa_ids.h
@@ -19,7 +19,7 @@
  * the underlying "meaning" is big-endian.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <byteswap.h>
 
diff --git a/src/include/ipxe/netdevice.h b/src/include/ipxe/netdevice.h
index f471e251..8e615c94 100644
--- a/src/include/ipxe/netdevice.h
+++ b/src/include/ipxe/netdevice.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/list.h>
diff --git a/src/include/ipxe/rarp.h b/src/include/ipxe/rarp.h
index f84301a4..9054db21 100644
--- a/src/include/ipxe/rarp.h
+++ b/src/include/ipxe/rarp.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <ipxe/netdevice.h>
 
diff --git a/src/include/ipxe/refcnt.h b/src/include/ipxe/refcnt.h
index 0e8b8658..7f489abc 100644
--- a/src/include/ipxe/refcnt.h
+++ b/src/include/ipxe/refcnt.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stddef.h>
 #include <assert.h>
diff --git a/src/include/ipxe/settings.h b/src/include/ipxe/settings.h
index d6929ecd..45d600b2 100644
--- a/src/include/ipxe/settings.h
+++ b/src/include/ipxe/settings.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/tables.h>
diff --git a/src/include/ipxe/smbios.h b/src/include/ipxe/smbios.h
index ef5892a2..24b05ed6 100644
--- a/src/include/ipxe/smbios.h
+++ b/src/include/ipxe/smbios.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/api.h>
diff --git a/src/include/ipxe/tcp.h b/src/include/ipxe/tcp.h
index 9baa6391..f12b4283 100644
--- a/src/include/ipxe/tcp.h
+++ b/src/include/ipxe/tcp.h
@@ -9,7 +9,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <ipxe/tcpip.h>
 
diff --git a/src/include/ipxe/tcpip.h b/src/include/ipxe/tcpip.h
index 200630d6..73a7bffd 100644
--- a/src/include/ipxe/tcpip.h
+++ b/src/include/ipxe/tcpip.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/socket.h>
diff --git a/src/include/ipxe/udp.h b/src/include/ipxe/udp.h
index 5717ef21..7b0de4dc 100644
--- a/src/include/ipxe/udp.h
+++ b/src/include/ipxe/udp.h
@@ -9,7 +9,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stddef.h>
 #include <ipxe/iobuf.h>
diff --git a/src/include/ipxe/uri.h b/src/include/ipxe/uri.h
index fb7728aa..00e5a24c 100644
--- a/src/include/ipxe/uri.h
+++ b/src/include/ipxe/uri.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stddef.h>
 #include <stdlib.h>
diff --git a/src/include/ipxe/vlan.h b/src/include/ipxe/vlan.h
index 083c2191..439e0c16 100644
--- a/src/include/ipxe/vlan.h
+++ b/src/include/ipxe/vlan.h
@@ -8,7 +8,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** A VLAN header */
 struct vlan_header {
diff --git a/src/include/readline/readline.h b/src/include/readline/readline.h
index 0449a3f9..afafbbdf 100644
--- a/src/include/readline/readline.h
+++ b/src/include/readline/readline.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** A readline history entry */
 struct readline_history_entry {
diff --git a/src/include/stdint.h b/src/include/stdint.h
index 8cc9b84a..0a239a51 100644
--- a/src/include/stdint.h
+++ b/src/include/stdint.h
@@ -1,7 +1,7 @@
 #ifndef _STDINT_H
 #define _STDINT_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /*
  * This is a standard predefined macro on all gcc's I've seen. It's
diff --git a/src/include/stdlib.h b/src/include/stdlib.h
index 819b87b3..d7748a07 100644
--- a/src/include/stdlib.h
+++ b/src/include/stdlib.h
@@ -1,7 +1,7 @@
 #ifndef STDLIB_H
 #define STDLIB_H
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <assert.h>
diff --git a/src/include/usr/autoboot.h b/src/include/usr/autoboot.h
index bc51aae7..c0603a0a 100644
--- a/src/include/usr/autoboot.h
+++ b/src/include/usr/autoboot.h
@@ -7,7 +7,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <ipxe/device.h>
 
diff --git a/src/include/wchar.h b/src/include/wchar.h
index ba349aae..d054b8d5 100644
--- a/src/include/wchar.h
+++ b/src/include/wchar.h
@@ -1,7 +1,7 @@
 #ifndef WCHAR_H
 #define WCHAR_H
 
-FILE_LICENCE ( GPL2_ONLY );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stddef.h>
 
diff --git a/src/interface/smbios/smbios_settings.c b/src/interface/smbios/smbios_settings.c
index 83e4320e..5eadfa08 100644
--- a/src/interface/smbios/smbios_settings.c
+++ b/src/interface/smbios/smbios_settings.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <string.h>
diff --git a/src/net/aoe.c b/src/net/aoe.c
index a6d7b3e7..2da8655b 100644
--- a/src/net/aoe.c
+++ b/src/net/aoe.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stddef.h>
 #include <string.h>
diff --git a/src/net/arp.c b/src/net/arp.c
index 261e681e..663dc002 100644
--- a/src/net/arp.c
+++ b/src/net/arp.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/src/net/eth_slow.c b/src/net/eth_slow.c
index db54b55a..049c26cb 100644
--- a/src/net/eth_slow.c
+++ b/src/net/eth_slow.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdlib.h>
 #include <string.h>
diff --git a/src/net/ethernet.c b/src/net/ethernet.c
index 03978c2a..1ca92a20 100644
--- a/src/net/ethernet.c
+++ b/src/net/ethernet.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/src/net/ipv4.c b/src/net/ipv4.c
index 4dae20d1..85ee5a68 100644
--- a/src/net/ipv4.c
+++ b/src/net/ipv4.c
@@ -16,6 +16,10 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
 #include <string.h>
@@ -44,7 +48,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /* Unique IP datagram identification number (high byte) */
 static uint8_t next_ident_high = 0;
diff --git a/src/net/netdevice.c b/src/net/netdevice.c
index a55e6b7d..3c4b4cd0 100644
--- a/src/net/netdevice.c
+++ b/src/net/netdevice.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/src/net/tcp.c b/src/net/tcp.c
index 987cb63e..719c9936 100644
--- a/src/net/tcp.c
+++ b/src/net/tcp.c
@@ -26,7 +26,7 @@
  *
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** A TCP connection */
 struct tcp_connection {
diff --git a/src/net/tcp/httpcore.c b/src/net/tcp/httpcore.c
index 1d1953e6..c20db704 100644
--- a/src/net/tcp/httpcore.c
+++ b/src/net/tcp/httpcore.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /**
  * @file
diff --git a/src/net/tcpip.c b/src/net/tcpip.c
index 4bcbe64b..261da582 100644
--- a/src/net/tcpip.c
+++ b/src/net/tcpip.c
@@ -17,7 +17,7 @@
  * TCP/IP transport-network layer interface
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /**
  * Process a received TCP/IP packet
diff --git a/src/net/udp.c b/src/net/udp.c
index 76da67ec..0f7dfb24 100644
--- a/src/net/udp.c
+++ b/src/net/udp.c
@@ -17,7 +17,7 @@
  * UDP protocol
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /**
  * A UDP connection
diff --git a/src/net/udp/dhcp.c b/src/net/udp/dhcp.c
index 7a1a7c49..2e75ac81 100644
--- a/src/net/udp/dhcp.c
+++ b/src/net/udp/dhcp.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <string.h>
 #include <stdlib.h>
diff --git a/src/net/udp/dns.c b/src/net/udp/dns.c
index fffe6e69..2d77477f 100644
--- a/src/net/udp/dns.c
+++ b/src/net/udp/dns.c
@@ -18,9 +18,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/src/net/udp/tftp.c b/src/net/udp/tftp.c
index 375d55e6..953bcb46 100644
--- a/src/net/udp/tftp.c
+++ b/src/net/udp/tftp.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/src/usr/autoboot.c b/src/usr/autoboot.c
index 4bcb64d4..72b8350c 100644
--- a/src/usr/autoboot.c
+++ b/src/usr/autoboot.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <string.h>
 #include <stdio.h>
diff --git a/src/usr/pxemenu.c b/src/usr/pxemenu.c
index b69905df..2d05d3f5 100644
--- a/src/usr/pxemenu.c
+++ b/src/usr/pxemenu.c
@@ -15,9 +15,13 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
  */
 
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <stdlib.h>