undefined instruction
时间: 2023-04-24 13:04:28 浏览: 116
未定义指令(undefined instruction)是指在CPU执行指令时遇到了无法识别的指令。这种情况通常是由于软件编写错误或硬件故障引起的。当CPU遇到未定义指令时,会抛出异常并停止执行程序。为了避免这种情况的发生,开发人员应该遵循正确的编程规范,并对硬件进行充分的测试和验证。
相关问题
rk817-codec rk817-codec: rk817_hw_params: SMIC TudorAG and previous versions [ 282.962747] Internal error: Oops - undefined instruction: 0 [#1] PREEMPT SMP
这是一个 Linux 内核的 Oops 错误,指示了一个未定义的指令导致了一个内部错误。这可能是由于内核代码中的 bug 或硬件故障引起的。该 Oops 错误还提供了一些其他有用的信息,例如该错误发生时的 CPU 状态、内核模块信息等。在这个例子中,rk817-codec 驱动程序的 rk817_hw_params 函数似乎是导致 Oops 错误的函数。如果这是一个临时的错误,可以尝试重新启动系统来解决问题。如果这是一个持续的错误,需要对内核进行调试以找到问题的根本原因。
JSRR instruction
The JSRR (Jump to Subroutine Register) instruction is a type of instruction in the LC-3 (Little Computer 3) assembly language. It is used to call a subroutine that is located at an address stored in a register.
The format of the JSRR instruction is:
```
JSRR BaseR
```
where `BaseR` is the register containing the address of the subroutine.
When the JSRR instruction is executed, the address of the next instruction (the return address) is pushed onto the stack, and the program counter (PC) is set to the address contained in `BaseR`.
The subroutine can then be executed, and when it is finished, it can return to the main program by using the `RET` (return from subroutine) instruction, which pops the return address off the stack and sets the PC to that address.
The JSRR instruction is useful for modularizing code and reducing code duplication by allowing the same code to be reused in multiple places.