c语言中的全局变量与static变量

int a = 10;

int main()
{
    static int b = 8;
    return 0;
}

汇编后的主要代码如下： 

.globl a
        .data
        .align 4
        .type   a, @object
        .size   a, 4
a:
        .long   10
        .align 4
        .type   b.1873, @object
        .size   b.1873, 4
b.1873:
        .long   8
        .text
.globl main
        .type   main, @function
main:
        pushq   %rbp
        movq    %rsp, %rbp
        movl    $0, %eax
        leave
        ret