The callee may also wish to decrease SP further, so as to allocate space on the stack for local variables, which will then be accessible at negative offsets from BP.

 
  • 被调用函数也可能希望逐渐减少SP值,以便为局部变量在堆栈中分配空间,然后可以以相对于BP负偏移的方式访问。
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