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Original question:
MCU-PLUS-SDK-AM243X: 在R5的核上进入异常中断后怎么获取进入异常前的PC指针
由armv7 r的架构手册可知，如图，针对banked registers可以通过MRS和MSR的方式访问，
现在我写了访问sp_usr、lr_usr、sp、lr、cpsr、spsr、spsr_svc的语句，如图可以看出不管是用MRS还是用mov的方式都操作不了sp_usr、lr_usr以及spsr_svc，所以banked register要怎么访问呢？要怎么样才能编译通过？编译器要设置什么吗？
已咨询e2e产品线工程师，请关注下面帖子的回复。e2e.ti.com/.../am2434-can-t-access-banked-register-using-msr-or-mrs
