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
|
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include "libc.h"
#include "atomic.h"
#include "syscall.h"
static void dummy()
{
}
/* __toread.c, __towrite.c, and atexit.c override these */
weak_alias(dummy, __funcs_on_exit);
weak_alias(dummy, __flush_on_exit);
weak_alias(dummy, __seek_on_exit);
#ifndef SHARED
weak_alias(dummy, _fini);
extern void (*const __fini_array_start)() __attribute__((weak));
extern void (*const __fini_array_end)() __attribute__((weak));
#endif
_Noreturn void exit(int code)
{
static int lock;
/* If more than one thread calls exit, hang until _Exit ends it all */
while (a_swap(&lock, 1)) __syscall(SYS_pause);
__funcs_on_exit();
#ifndef SHARED
uintptr_t a = (uintptr_t)&__fini_array_end;
for (; a>(uintptr_t)&__fini_array_start; a-=sizeof(void(*)()))
(*(void (**)())(a-sizeof(void(*)())))();
_fini();
#endif
__flush_on_exit();
__seek_on_exit();
_Exit(code);
for(;;);
}
|