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#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(;;); } |