question of watchpoint

"[email protected]" <[email protected]>
Newsgroups gmane.comp.gdb.devel
Message-ID <[email protected]> 
Hi,  guys: 

    I have a question about watch-point.
    If the program mapped a physical address(PA)  to two（or more than one） virtual address (VA and VB), if I set a watchpiont at Va, after this, I modify VB, what does gdb do? 
    Trigger a watchpoint or do nothing? If triggered a watchpoint how to report it?
    If anyone knows, pls help me with it. 
    
    Thinks a lot. 

Ron Ren
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