+ short si_addr_lsb;/* Least significant bit of address (since Linux 2.6.32) */
+ void *si_lower; /* Lower bound when address violation occurred (since Linux 3.19) */
+ void *si_upper; /* Upper bound when address violation occurred (since Linux 3.19) */
+ int si_pkey; /* Protection key on PTE that caused fault (since Linux 4.6) */
+ void *si_call_addr; /* Address of system call instruction (since Linux 3.5) */
+ int si_syscall; /* Number of attempted system call (since Linux 3.5) */
+ unsigned int si_arch;/* Architecture of attempted system call (since Linux 3.5) */
+ }