LR_OFFSET is the offset into the stack frame of the return address.
LR_OFFSET是返回地址的堆栈框架的偏移量。
After this, the address of the string usort_str is pushed onto the stack (line 30).
在此之后，字符串的地址usort_str被压入堆栈(第30行)。
It optionally takes a stack frame address as an argument.
它可以有选择地将堆栈帧地址作为参数。
How does Stack Overflow get this address?
如何堆栈溢出得到这个地址吗？
The address of the specified field is pushed onto the stack.
将指定字段的地址推送到堆栈上。
If the stack frame is active, this address is the next instruction to execute.
如果堆栈帧处于活动状态，则此地址是要执行的下一条指令。
If the stack frame is active, this address is the next instruction to execute.
如果堆栈帧处于活动状态，则此地址是要执行的下一条指令。
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