[rfa/mips] Fix reread.exp on mips-linux

[Daniel Jacobowitz <drow@false.org>]

My goof, from two years or so ago.  This is allocated on the objfile
obstack, and we stashed it in obj_private; but obj_private doesn't get
cleared.  If we put it in the new objfile_data machinery like a good little
interface user, then it gets cleared at the right time.  This prevents
segfaulting as soon as the executable changes.

OK for head/6.1?

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer

2004-03-24  Daniel Jacobowitz  <drow@mvista.com>

	* mips-tdep.c (mips_pdr_data): New.
	(non_heuristic_proc_desc): Use objfile_data and set_objfile_data.
	(_initialize_mips_tdep): Initialize mips_pdr_data.

Index: mips-tdep.c
===================================================================
RCS file: /big/fsf/rsync/src-cvs/src/gdb/mips-tdep.c,v
retrieving revision 1.285
diff -u -p -r1.285 mips-tdep.c
--- mips-tdep.c	23 Mar 2004 14:47:56 -0000	1.285
+++ mips-tdep.c	25 Mar 2004 01:47:54 -0000
@@ -54,6 +54,8 @@
 #include "frame-base.h"
 #include "trad-frame.h"
 
+static const struct objfile_data *mips_pdr_data;
+
 static void set_reg_offset (CORE_ADDR *saved_regs, int regnum, CORE_ADDR off);
 static struct type *mips_register_type (struct gdbarch *gdbarch, int regnum);
 
@@ -2298,7 +2300,7 @@ non_heuristic_proc_desc (CORE_ADDR pc, C
   sec = find_pc_section (pc);
   if (sec != NULL)
     {
-      priv = (struct mips_objfile_private *) sec->objfile->obj_private;
+      priv = (struct mips_objfile_private *) objfile_data (sec->objfile, mips_pdr_data);
 
       /* Search the ".pdr" section generated by GAS.  This includes most of
          the information normally found in ECOFF PDRs.  */
@@ -2316,7 +2318,7 @@ non_heuristic_proc_desc (CORE_ADDR pc, C
 	  priv = obstack_alloc (&sec->objfile->objfile_obstack,
 				sizeof (struct mips_objfile_private));
 	  priv->size = 0;
-	  sec->objfile->obj_private = priv;
+	  set_objfile_data (sec->objfile, mips_pdr_data, priv);
 	}
       else if (priv == NULL)
 	{
@@ -2344,7 +2346,7 @@ non_heuristic_proc_desc (CORE_ADDR pc, C
 	  else
 	    priv->size = 0;
 
-	  sec->objfile->obj_private = priv;
+	  set_objfile_data (sec->objfile, mips_pdr_data, priv);
 	}
       the_bfd = NULL;
 
@@ -6101,6 +6103,8 @@ _initialize_mips_tdep (void)
     internal_error (__FILE__, __LINE__, "mips_abi_strings out of sync");
 
   gdbarch_register (bfd_arch_mips, mips_gdbarch_init, mips_dump_tdep);
+
+  mips_pdr_data = register_objfile_data ();
 
   /* Add root prefix command for all "set mips"/"show mips" commands */
   add_prefix_cmd ("mips", no_class, set_mips_command,