为什么CC debuger连着keyfob板子在IAR下运行约半小时之后就会出这样的警告？

Thu Oct 17 15:38:02 2013: Warning: Possible IDATA stack overflow detected. Reset target to re-enable overflow check
Thu Oct 17 15:38:16 2013: The stack 'IdataStack' is filled to 100% (192 bytes used out of 192). The warning threshold is set to 90.%
Thu Oct 17 15:38:16 2013: The stack 'XdataStack' is filled to 100% (640 bytes used out of 640). The warning threshold is set to 90.%
Thu Oct 17 15:38:16 2013: The stack pointer for stack 'XdataStack' (currently XData:0x0000) is outside the stack range (XData:0x0001 to XData:0x0281)

请问这是什么状况啊？（用的是ti 的例子，自己没改过的）