1 | /* Initializer module for building the ELF shared C library. This file and |
2 | sofini.c do the work normally done by crtbeginS.o and crtendS.o, to wrap |
3 | the `.ctors' and `.dtors' sections so the lists are terminated, and |
4 | calling those lists of functions. */ |
5 | |
6 | #ifndef NO_CTORS_DTORS_SECTIONS |
7 | # include <libc-internal.h> |
8 | # include <stdlib.h> |
9 | |
10 | static void (*const __CTOR_LIST__[1]) (void) |
11 | __attribute__ ((used, section (".ctors" ))) |
12 | = { (void (*) (void)) -1 }; |
13 | static void (*const __DTOR_LIST__[1]) (void) |
14 | __attribute__ ((used, section (".dtors" ))) |
15 | = { (void (*) (void)) -1 }; |
16 | |
17 | static inline void |
18 | run_hooks (void (*const list[]) (void)) |
19 | { |
20 | while (*++list) |
21 | (**list) (); |
22 | } |
23 | |
24 | /* This function will be called from _init in init-first.c. */ |
25 | void |
26 | __libc_global_ctors (void) |
27 | { |
28 | /* Call constructor functions. */ |
29 | run_hooks (__CTOR_LIST__); |
30 | } |
31 | |
32 | |
33 | /* This function becomes the DT_FINI termination function |
34 | for the C library. */ |
35 | void |
36 | __libc_fini (void) |
37 | { |
38 | /* Call destructor functions. */ |
39 | run_hooks (__DTOR_LIST__); |
40 | } |
41 | |
42 | void (*_fini_ptr) (void) __attribute__ ((section (".fini_array" ))) |
43 | = &__libc_fini; |
44 | #endif |
45 | |