- struct sigaction ill_oact,ill_act;
- sigset_t oset;
-
- memset(&ill_act,0,sizeof(ill_act));
- ill_act.sa_handler = ill_handler;
- sigfillset(&ill_act.sa_mask);
- sigdelset(&ill_act.sa_mask,SIGILL);
- sigprocmask(SIG_SETMASK,&ill_act.sa_mask,&oset);
- sigaction (SIGILL,&ill_act,&ill_oact);
- if (sigsetjmp(ill_jmp,0) == 0)
+ struct utsname uts;
+# if defined(_SC_AIX_KERNEL_BITMODE)
+ if (sysconf(_SC_AIX_KERNEL_BITMODE)!=64) return;
+# endif
+ if (uname(&uts)!=0 || atoi(uts.version)<6) return;
+ }
+#endif
+
+ memset(&ill_act,0,sizeof(ill_act));
+ ill_act.sa_handler = ill_handler;
+ ill_act.sa_mask = all_masked;
+
+ sigprocmask(SIG_SETMASK,&ill_act.sa_mask,&oset);
+ sigaction(SIGILL,&ill_act,&ill_oact);
+
+ if (sizeof(size_t)==4)
+ {
+#ifdef __linux
+ struct utsname uts;
+ if (uname(&uts)==0 && strcmp(uts.machine,"ppc64")==0)
+#endif
+ if (sigsetjmp(ill_jmp,1) == 0)