segfault at 0 ip sp error 14

error 14从未见过。谁能帮我解答什么情况才会出现这个，而且怎么定位崩溃函数地址？

备忘：

segfault at 引起故障的地址
ip 指令的内存地址
sp 堆栈指针地址, 及栈顶指针
err is not an errno nor a signal numbe, but page fault error code
[400000+13000] 对象崩溃时映射的虚拟内存起始地址和大小

error code是位运算，说明：

*   bit 0 == 0: no page found1: protection fault
 *   bit 1 == 0: read access1: write access
 *   bit 2 == 0: kernel-mode access1: user-mode access
 *   bit 3 == 1: use of reserved bit detected
 *   bit 4 == 1: fault was an instruction fetch