Hi All, I compile with -fstack-check and check the disassembly file. gcc generates a `sw zero,-4392(sp)' instruction before every function call. I think -4392(sp) is used as a guard to check if the stack has been overflow during the function is executed. What I does not understand is there is not a call to ___chkstk on return of the function call. If I miss the chance to check the guard word, when the stack check action should be executed? And how the check action is invoked? BTW, I wonder how gcc decides the offset is -4392? Can I change the value by some option? ------------- Best Regards, PRC Jul 2, 2008
