之后，为堆栈框架定义几个常量。

After this, you define several constants for your stack frames.

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之后再恢复堆栈框架并返回。

Then you restore the stack frame and return.

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它首先设置一个堆栈框架。

It starts by setting up a stack frame.

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序言为函数设置堆栈框架。

The prologue sets up the stack frame for the function.

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回链指针指向前一个堆栈框架的回链指针。

The back chain pointer points to the back chain pointer of the previous stack frame.

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剩下要做的只是恢复先前的堆栈框架并返回。

All that is left to do is to restore the previous stack frame and return.

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堆栈指针给出的是当前堆栈框架的结束位置。

The stack pointer tells you where the end of your current stack frame is.

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它不会调用另一个函数，所以不需要堆栈框架。

It never calls another function, so it doesn't need a stack frame.

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就目前而言，只需知道它将设置堆栈框架就可以了。

For right now, just know that it sets up the stack frame.

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LR_OFFSET是返回地址的堆栈框架的偏移量。

LR_OFFSET is the offset into the stack frame of the return address.

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LR_OFFSET是返回地址的堆栈框架的偏移量。

LR_OFFSET is the offset into the stack frame of the return address.

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