代码

extern "C" void __init_libc(char**, char*);
extern "C" void __libc_start_init(void);
static inline void rx(int c){ register long rax __asm__("rax")=60; register long rdi __asm__("rdi")=c; __asm__ volatile("syscall"::"a"(rax),"D"(rdi):"rcx","r11","memory"); }
extern "C" int __libc_start_main(int(*m)(int,char**,char**),int c,char**v,void(*i)(void),void(*f)(void),void(*l)(void)){
  char** envp = v+c+1;
  __init_libc(envp, v[0]);
  __libc_start_init();
  m(c,v,envp);
  rx(0);
  return 0;
}

评测结果