1/*-
2 * Copyright 2000 David E. O'Brien, John D. Polstra.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <stdint.h>
27
28#define ABI_VENDOR	"Android"
29#define ABI_SECTION	".note.android.ident"
30#define ABI_NOTETYPE	1
31#define ABI_ANDROID_API	PLATFORM_SDK_VERSION
32
33/*
34 * Special ".note" entry to tag an Android binary and specify the ABI version.
35 *
36 * For all arches except sparc, gcc emits the section directive for the
37 * following struct with a PROGBITS type.  However, the section should be
38 * of NOTE type, according to the Generic SysV ABI spec.
39 *
40 * Unfortunately, there is no clean way to tell gcc to use another section type,
41 * so this C file (or the C file that includes it) must be compiled in multiple
42 * steps:
43 *
44 * - Compile the .c file to a .s file.
45 * - Edit the .s file to change the 'progbits' type to 'note', for the section
46 *   directive that defines the .note.ABI-tag section.
47 * - Compile the .s file to an object file.
48 *
49 * These steps are done in the invididual Makefiles for each applicable arch.
50 */
51static const struct {
52    int32_t	namesz;
53    int32_t	descsz;
54    int32_t	type;
55    char	name[sizeof ABI_VENDOR];
56    int32_t	android_api;
57} abitag __attribute__ ((section (ABI_SECTION), aligned(4), used)) = {
58    sizeof ABI_VENDOR,
59    sizeof(int32_t),
60    ABI_NOTETYPE,
61    ABI_VENDOR,
62    ABI_ANDROID_API,
63};
64