1#include <unistd.h>
2
3/* Give init non-default priority so that it runs before init_array. */
4static void init (void) __attribute__ ((constructor (1000)));
5
6static void
7init (void)
8{
9 write (STDOUT_FILENO, buf: "init\n", n: 5);
10}
11
12/* Give fini the same priority as init. */
13static void fini (void) __attribute__ ((destructor (1000)));
14
15static void
16fini (void)
17{
18 write (STDOUT_FILENO, buf: "fini\n", n: 5);
19}
20
21static void
22preinit_0 (void)
23{
24 write (STDOUT_FILENO, buf: "preinit array 0\n", n: 16);
25}
26
27static void
28preinit_1 (void)
29{
30 write (STDOUT_FILENO, buf: "preinit array 1\n", n: 16);
31}
32
33static void
34preinit_2 (void)
35{
36 write (STDOUT_FILENO, buf: "preinit array 2\n", n: 16);
37}
38
39void (*const preinit_array []) (void)
40 __attribute__ ((section (".preinit_array"), aligned (sizeof (void *)))) =
41{
42 &preinit_0,
43 &preinit_1,
44 &preinit_2
45};
46
47static void
48init_0 (void)
49{
50 write (STDOUT_FILENO, buf: "init array 0\n", n: 13);
51}
52
53static void
54init_1 (void)
55{
56 write (STDOUT_FILENO, buf: "init array 1\n", n: 13);
57}
58
59static void
60init_2 (void)
61{
62 write (STDOUT_FILENO, buf: "init array 2\n", n: 13);
63}
64
65void (*init_array []) (void)
66 __attribute__ ((section (".init_array"), aligned (sizeof (void *)))) =
67{
68 &init_0,
69 &init_1,
70 &init_2
71};
72
73static void
74fini_0 (void)
75{
76 write (STDOUT_FILENO, buf: "fini array 0\n", n: 13);
77}
78
79static void
80fini_1 (void)
81{
82 write (STDOUT_FILENO, buf: "fini array 1\n", n: 13);
83}
84
85static void
86fini_2 (void)
87{
88 write (STDOUT_FILENO, buf: "fini array 2\n", n: 13);
89}
90
91void (*fini_array []) (void)
92 __attribute__ ((section (".fini_array"), aligned (sizeof (void *)))) =
93{
94 &fini_0,
95 &fini_1,
96 &fini_2
97};
98
99int
100main (void)
101{
102 return 0;
103}
104

source code of glibc/elf/tst-array1.c