This will save the old stack pointer and allocate stack memory atomically.
这会保存原来的堆栈指针，并自动分配堆栈内存。
Remember that a pointer is just a variable that holds a memory location.
记住，一个指针是一个变量保存一个内存位置。
How to Store value in Stack Pointer Register to Memory (8085)?
如何存储在堆栈指针寄存器值记忆（8085）?。
It is also not even a pointer in kernel memory.
这也是一个指针，甚至没有在内核内存。
Can memory be freed if its pointer has changed type?
可记忆被释放，如果指针已经改变了吗？
A pointer is to point to a memory location.
是指一个内存位置的指针。
A pointer is to point to a memory location.
是指一个内存位置的指针。
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