Crashme test causes arm data abort vector modified

Hi,  All,

I have tested crashme on Marvell PXA920 processor with kernel 3.5-rc6.
System will
hang during testing. Sometimes, the board could be connected by JTAG. I
found the
vector_dabt(address 0xFFFF0010) have been modified.

The instruction should be a jump instruction. But it have been modified to
"BKPT
0x1" or "Undefined". The Vector modification doesn't  happen every time when
testing.

Have anyone encountered with this status ?  Why arm vector is modified?
Thanks in advance.

BR,
Luffy
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