--- gforth/engine/signals.c	2003/01/19 23:35:34	1.21
+++ gforth/engine/signals.c	2003/02/17 22:42:09	1.25
@@ -1,6 +1,6 @@
 /* signal handling
 
-  Copyright (C) 1995-2003 Free Software Foundation, Inc.
+  Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
 
   This file is part of Gforth.
 
@@ -72,8 +72,6 @@ void install_signal_handler(int sig, voi
 }
 #endif
 
-typedef void Sigfunc(int);
-
 Sigfunc *bsd_signal(int signo, Sigfunc *func)
 {
   struct sigaction act, oact;
@@ -109,12 +107,21 @@ signal_throw(int sig)
   case SIGBUS: code=-23; break;
 #endif
   case SIGSEGV: code=-9; break;
+#ifdef SIGPIPE
+  case SIGPIPE: code=-2049; break;
+#endif
   default: code=-256-sig; break;
   }
   longjmp(throw_jmp_buf,code); /* !! or use siglongjmp ? */
 }
 
 #ifdef SA_SIGINFO
+static void
+sigaction_throw(int sig, siginfo_t *info, void *_)
+{
+  signal_throw(sig);
+}
+
 static void fpe_handler(int sig, siginfo_t *info, void *_)
      /* handler for SIGFPE */
 {
@@ -374,7 +381,12 @@ void install_signal_handlers(void)
   int sas_retval=-1;
 
   sigstack.ss_size=SIGSTKSZ;
-  if ((sigstack.ss_sp = my_alloc(sigstack.ss_size)) != NULL) {
+  /* Actually the stack should only be ss_size large, and according to
+     SUSv2 ss_sp should point to the start of the stack, but
+     unfortunately Irix 6.5 (at least) expects ss_sp to point to the
+     end, so we work around this issue by accomodating everyone. */
+  if ((sigstack.ss_sp = my_alloc(sigstack.ss_size*2)) != NULL) {
+    sigstack.ss_sp += sigstack.ss_size;
     sigstack.ss_flags=0;
     sas_retval=sigaltstack(&sigstack,(stack_t *)0);
   }
@@ -393,10 +405,25 @@ void install_signal_handlers(void)
     bsd_signal(sigs_to_quit [i], graceful_exit);
 #ifdef SA_SIGINFO
   if (!die_on_signal) {
+#ifdef SIGFPE
     install_signal_handler(SIGFPE, fpe_handler);
+#endif
+#ifdef SIGSEGV
     install_signal_handler(SIGSEGV, segv_handler);
-  }
 #endif
+    /* use SA_ONSTACK for all signals that could come from executing
+       wrong code */
+#ifdef SIGILL
+    install_signal_handler(SIGILL, sigaction_throw);
+#endif
+#ifdef SIGBUS
+    install_signal_handler(SIGBUS, sigaction_throw);
+#endif
+#ifdef SIGTRAP
+    install_signal_handler(SIGTRAP, sigaction_throw);
+#endif
+  }
+#endif /* defined(SA_SIGINFO) */
 #ifdef SIGCONT
     bsd_signal(SIGCONT, termprep);
 #endif