2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright 2000 David E. O'Brien, John D. Polstra.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/elf_common.h>
36 * Special ".note" entry specifying the ABI version. See
37 * http://www.netbsd.org/Documentation/kernel/elf-notes.html
38 * for more information.
40 * For all arches except sparc, gcc emits the section directive for the
41 * following struct with a PROGBITS type. However, newer versions of binutils
42 * (after 2.16.90) require the section to be of NOTE type, to guarantee that the
43 * .note.ABI-tag section correctly ends up in the first page of the final
46 * Unfortunately, there is no clean way to tell gcc to use another section type,
47 * so this C file (or the C file that includes it) must be compiled in multiple
50 * - Compile the .c file to a .s file.
51 * - Edit the .s file to change the 'progbits' type to 'note', for the section
52 * directive that defines the .note.ABI-tag section.
53 * - Compile the .s file to an object file.
55 * These steps are done in the invididual Makefiles for each applicable arch.
61 char name[sizeof(NOTE_FREEBSD_VENDOR)];
63 } abitag __attribute__ ((section (NOTE_SECTION), aligned(4))) __used = {
64 .namesz = sizeof(NOTE_FREEBSD_VENDOR),
65 .descsz = sizeof(int32_t),
66 .type = NT_FREEBSD_ABI_TAG,
67 .name = NOTE_FREEBSD_VENDOR,