si_syscall
mdb_printf(" system call %d (", si.si_syscall);
dst->si_syscall = src->si_syscall;
dst->si_syscall = src->si_syscall;
sip->si_syscall = sysnum;
sip->si_syscall = sysnum;
dest->si_syscall = src->si_syscall;
dest->si_syscall = src->si_syscall;