1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/* Initializer module for building the ELF shared C library. This file and
sofini.c do the work normally done by crtbeginS.o and crtendS.o, to wrap
the `.ctors' and `.dtors' sections so the lists are terminated, and
calling those lists of functions. */
static void (*const __CTOR_LIST__[1]) (void)
__attribute__ ((section (".ctors")))
= { (void (*) (void)) -1 };
static void (*const __DTOR_LIST__[1]) (void)
__attribute__ ((section (".dtors")))
= { (void (*) (void)) -1 };
static inline void
run_hooks (void (*const list[]) (void))
{
while (*++list)
(**list) ();
}
#ifdef HAVE_DWARF2_UNWIND_INFO
static char __EH_FRAME_BEGIN__[]
__attribute__ ((section (".eh_frame")))
= { };
# ifdef HAVE_DWARF2_UNWIND_INFO_STATIC
/* This must match what's in frame.h in gcc. How can one do that? */
struct object
{
void *pc_begin;
void *pc_end;
void *fde_begin;
void *fde_array;
__SIZE_TYPE__ count;
struct object *next;
};
extern void __register_frame_info (const void *, struct object *);
extern void __deregister_frame_info (const void *);
# else
extern void __register_frame (const void *);
extern void __deregister_frame (const void *);
# endif
#endif
/* This function will be called from _init in init-first.c. */
void
__libc_global_ctors (void)
{
/* Call constructor functions. */
run_hooks (__CTOR_LIST__);
#ifdef HAVE_DWARF2_UNWIND_INFO
# ifdef HAVE_DWARF2_UNWIND_INFO_STATIC
{
static struct object ob;
__register_frame_info (__EH_FRAME_BEGIN__, &ob);
}
# else
__register_frame (__EH_FRAME_BEGIN__);
# endif
#endif
}
/* This function becomes the DT_FINI termination function
for the C library. */
void _fini (void) __attribute__ ((section (".fini"))); /* Just for kicks. */
void
_fini (void)
{
/* Call destructor functions. */
run_hooks (__DTOR_LIST__);
#ifdef HAVE_DWARF2_UNWIND_INFO
# ifdef HAVE_DWARF2_UNWIND_INFO_STATIC
__deregister_frame_info (__EH_FRAME_BEGIN__);
# else
__deregister_frame (__EH_FRAME_BEGIN__);
# endif
#endif
}
|
