链接寄存器保存区存有被调用函数（而非当前函数）的链接寄存器内容。
The link register save area holds the link register contents of the function being called, rather than for the current function.
内存中的一块留用存储区，当程序中断产生时，CPU自动在其中保存程序计数器和工作寄存器的内容。
A reserved area of memory where the CPU automatically saves the program counter and the contents of working registers when a program interrupt occurs.
跟踪缓冲区并不保存栈顶或由寄存器所指向的内存的内容。
Trace buffer doesn't save top of stack or contents of memory referenced by registers.
跟踪缓冲区并不保存栈顶或由寄存器所指向的内存的内容。
Trace buffer doesn't save top of stack or contents of memory referenced by registers.
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