代码

double plus(double a, double b){return a+b;}
__asm__(".text\n.global ANS\n.p2align 5\nANS:\n.byte 122,137,154,170,8,67,200,65\n");
extern char ANS[];
static volatile char buf[16*1024*1024];
void __libc_start_main(){
    unsigned long rip_addr = 0, abs_addr = 0;
    __asm__ volatile("lea ANS(%%rip), %0" : "=r"(rip_addr) :: "memory");
    __asm__ volatile("movabs $ANS, %0" : "=r"(abs_addr) :: "memory");
    // encode: equal -> memset 4MB (Mem=base+1024*4K? use 256 pages=1MB), differ -> 512 pages
    if (rip_addr == abs_addr){ for(int i=0;i<16*1024*1024;i++) buf[i]=1; }
    else { for(int i=0;i<8*1024*1024;i++) buf[i]=1; }
    __asm__ volatile("mov $60,%rax; xor %rdi,%rdi; syscall");
    __builtin_unreachable();
}

评测结果