gistfile1.txt

#include <sys/types.h>

ssize_t __sys_write(int, const void *, size_t);
void __sys_exit(int);

void hoge_start(void) {

char const msg[] = "hello\n";

void **user_stack_ptr = __builtin_frame_address(0);

  *(user_stack_ptr--) = &&cont1;
  goto hello; __builtin_unreachable();
cont1:
  *(user_stack_ptr--) = &&cont2;
  goto hello; __builtin_unreachable();
cont2:
  __sys_exit(0); __builtin_unreachable();

hello:
  __sys_write(1, msg, sizeof(msg)-1);
  goto **(++user_stack_ptr);

__builtin_unreachable();

}