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crtbrand.c (174251) crtbrand.c (217375)
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

--- 10 unchanged lines hidden (view full) ---

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 <sys/cdefs.h>
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

--- 10 unchanged lines hidden (view full) ---

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 <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/lib/csu/common/crtbrand.c 174251 2007-12-04 12:18:43Z kib $");
27__FBSDID("$FreeBSD: head/lib/csu/common/crtbrand.c 217375 2011-01-13 20:44:31Z dim $");
28
29#include <sys/param.h>
30
31#define ABI_VENDOR "FreeBSD"
32#define ABI_SECTION ".note.ABI-tag"
33#define ABI_NOTETYPE 1
34
35/*
36 * Special ".note" entry specifying the ABI version. See
37 * http://www.netbsd.org/Documentation/kernel/elf-notes.html
38 * for more information.
28
29#include <sys/param.h>
30
31#define ABI_VENDOR "FreeBSD"
32#define ABI_SECTION ".note.ABI-tag"
33#define ABI_NOTETYPE 1
34
35/*
36 * Special ".note" entry specifying the ABI version. See
37 * http://www.netbsd.org/Documentation/kernel/elf-notes.html
38 * for more information.
39 *
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
44 * executable.
45 *
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
48 * steps:
49 *
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.
54 *
55 * These steps are done in the invididual Makefiles for each applicable arch.
39 */
40static const struct {
41 int32_t namesz;
42 int32_t descsz;
43 int32_t type;
44 char name[sizeof ABI_VENDOR];
45 int32_t desc;
46} abitag __attribute__ ((section (ABI_SECTION), aligned(4))) __used = {
47 sizeof ABI_VENDOR,
48 sizeof(int32_t),
49 ABI_NOTETYPE,
50 ABI_VENDOR,
51 __FreeBSD_version
52};
56 */
57static const struct {
58 int32_t namesz;
59 int32_t descsz;
60 int32_t type;
61 char name[sizeof ABI_VENDOR];
62 int32_t desc;
63} abitag __attribute__ ((section (ABI_SECTION), aligned(4))) __used = {
64 sizeof ABI_VENDOR,
65 sizeof(int32_t),
66 ABI_NOTETYPE,
67 ABI_VENDOR,
68 __FreeBSD_version
69};