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Synchronous External Abort In Data Abort Proc of Coretex-R5 when PC jump from TCM(0x0~64K) to DDR(0x20000000~)

请问:

在我的项目里面,CPU是Coretex-R5的,Vector Table各异常Entry入口都在TCM内部(0x0~0x10000),

但是其中需要调用在DDR中的1段公共代码(几个R5共享的),DDR Base Address是0x20000000,而0x1C000000~0x1FFFFFFF区间是Rsv段。

但是当PC进入函数Cpu0CommonPushProc内部之后,寄存器DFSR、DFAR显示产生了Synchronous External Abort,并且地址是在0x1FFFFFC0,但是我此时并没有访问此地址,

请问是什么原因呢?