module program with 汇编:no such instruction

lrh_0_2000

this is part of my program:
asmlinkage ssize_t new_read(unsigned int fd,char* buf,size_t size)

{

        printk("<1>; new read begin\n";
       __asm__("pushad";
       __asm__("popad";
//call _HookDestFunction@0 ;再处理
return orig_read(fd,buf,size);
}

error: pushad no such instruction
error: popad no such instruction
why?
when call _HookDestFunction,will registers  be changed?

cnwalker

内嵌汇编绝对不是这么简简单单的。。。好好看看gcc手册吧