S32K函数入口地址获取问题

[zhengjianfei1]

Hi ，

   最近在获取函数入口地址的时候，发现一个问题：获取的函数入口地址和实际的函数入口地址不一致（获取的地址比实际地址大1），但根据获取的这个地址跳转如函数，功能是正常的。想咨询下是什么原因会导致这个现象。具体如下图：

[danielmartynek · Accepted solution]

Hi zhengjianfei@zlgmcu.com,

This is expected as the Cortex M4/M0+ core support Thumb instruction set only.

Please refer to ARM®v7-M Architecture Reference Manual (if you are using S32K14x).
https://static.docs.arm.com/ddi0403/eb/DDI0403E_B_armv7m_arm.pdf

A4.1 About the instruction set
A4.1.1 ARMv7-M and interworking support

“… therefore the value of address bit[0] must be 1 in interworking instructions.”

BR, Daniel

[zhengjianfei1]

Hi Daniel，

   Thanks Very much！