OSDev.org

Posted: **Tue May 06, 2003 7:56 am**

When a thread ends, how do you tell that its done if they dont use an exit() call? I dont see how you could end it gracefully from a return..

Posted: **Tue May 06, 2003 8:06 am**

Do you mean something like following?

int main(void)
{
   printf("I am a process :-)\n");
   return 0;
}

Well, the trick is: main() is not the start of a process - the *real* entry is a function often called start:

_start:
  push env
  push argv
  push argc
  call main
  call exit

So the OS exits the process if it doesn't exit itself

Ending Processes