gcc/ ChangeLog:

	* config/s390/s390.c (s390_emit_prologoue): Make sure backchain is
	set up before any trapping memory access if flag_non_call_exceptions.
libjava/ ChangeLog:
	* configure.in (HAVE_BACKTRACE) [s390*-*-linux*]: Define.
	* configure: Regenerate.

From-SVN: r64995

gcc/ChangeLog

+2003-03-29  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* config/s390/s390.c (s390_emit_prologoue): Make sure backchain is
+	set up before any trapping memory access if flag_non_call_exceptions.
+
 2003-03-29  Alan Modra  <amodra@bigpond.net.au>
 
 	* reload1.c (reload_as_needed): Allow a USE in asm reloads.

gcc/config/s390/s390.c

@@ -5429,6 +5429,16 @@ s390_emit_prologue ()
 	  set_mem_alias_set (addr, s390_sr_alias_set);
 	  insn = emit_insn (gen_move_insn (addr, temp_reg));
 	}
+
+      /* If we support asynchronous exceptions (e.g. for Java),
+	 we need to make sure the backchain pointer is set up
+	 before any possibly trapping memory access.  */
+
+      if (TARGET_BACKCHAIN && flag_non_call_exceptions)
+	{
+	  addr = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode));
+	  emit_insn (gen_rtx_CLOBBER (VOIDmode, addr));
+	}
     }
 
   /* Save fprs 8 - 15 (64 bit ABI).  */

libjava/ChangeLog

+2003-03-29  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* configure.in (HAVE_BACKTRACE) [s390*-*-linux*]: Define.
+	* configure: Regenerate.
+
 2003-03-28  Michael Koch  <konqueror@gmx.de>
 
 	* java/io/File.java:

libjava/configure.in

@@ -580,9 +580,6 @@ else
        ia64-*-linux*)
 	 # Has broken backtrace()
 	 ;;
-       s390*-*-linux*)
-	 # Has broken backtrace()
-	 ;;
        *)
          AC_DEFINE(HAVE_BACKTRACE)
 	 ;;