| Michael Hope | ea8fad1 | 2012-07-31 16:18:22 +1200 | [diff] [blame] | 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 | */ |
| 51 | static 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 | }; |