AT&T寻址

080483b4 <main>:int main(){ 80483b4:55                   push   %ebp 80483b5:89 e5                mov    %esp,%ebp 80483b7:83 ec 10             sub    $0x10,%espint a=10; 80483ba:c7 45 fc 0a 00 00 00 movl   $0xa,-0x4(%ebp)int *p=&a; 80483c1:8d 45 fc             lea    -0x4(%ebp),%eax 80483c4:89 45 f8             mov    %eax,-0x8(%ebp)int b=*p; 80483c7:8b 45 f8             mov    -0x8(%ebp),%eax 80483ca:8b 00                mov    (%eax),%eax 80483cc:89 45 f4             mov    %eax,-0xc(%ebp)return b; 80483cf:8b 45 f4             mov    -0xc(%ebp),%eax}

objdump -dS ./a.out

lea    -0x4(%ebp),%eaxmov    %eax,-0x8(%ebp)

lea 和 mov的区别：lea取地址

-0x8（%ebp）：基址寻址

(%eax):间接寻址

%eax：可以看作寄存器寻址，和内存地址不在一个地址空间

$0xa：立即数寻址