Handle missing shared libraries during the examination of a core

	dump gracefully.
	* solib.c (find_solib):  Use catch_errors around call to
	solib_map_sections. Use warning instead of error if reading of
	the shared library name fails.
	(solib_map_sections):  Change return and argument types to make
	it callable from catch_errors.
	(symbol_add_stub):  Avoid GDB core dump if solib->abfd is NULL.
	* irix5-nat.c, osfsolib.c (xfer_link_map_member, solib_map_sections,
	symbol_add_stub):  Ditto.

1 files changed, 14 insertions, 9 deletions

diff --git a/gdb/osfsolib.c b/gdb/osfsolib.c
index ea07208..21b423b 100644
--- a/gdb/osfsolib.c
+++ b/gdb/osfsolib.c
@@ -1,5 +1,5 @@
 /* Handle OSF/1 shared libraries for GDB, the GNU Debugger.
-   Copyright 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
+   Copyright 1993, 1994, 1995, 1996, 1998 Free Software Foundation, Inc.
    
 This file is part of GDB.
 
@@ -193,8 +193,8 @@ next_link_map_member PARAMS ((struct so_list *));
 static void
 xfer_link_map_member PARAMS ((struct so_list *, struct link_map *));
 
-static void
-solib_map_sections PARAMS ((struct so_list *));
+static int
+solib_map_sections PARAMS ((char *));
 
 /*
 
@@ -204,7 +204,7 @@ LOCAL FUNCTION
 
 SYNOPSIS
 
-	static void solib_map_sections (struct so_list *so)
+	static int solib_map_sections (struct so_list *so)
 
 DESCRIPTION
 
@@ -223,10 +223,11 @@ FIXMES
 	expansion stuff?).
  */
 
-static void
-solib_map_sections (so)
-     struct so_list *so;
+static int
+solib_map_sections (arg)
+     char *arg;
 {
+  struct so_list *so = (struct so_list *) arg;	/* catch_errors bogon */
   char *filename;
   char *scratch_pathname;
   int scratch_chan;
@@ -288,6 +289,8 @@ solib_map_sections (so)
 
   /* Free the file names, close the file now.  */
   do_cleanups (old_chain);
+
+  return (1);
 }
 
 /*
@@ -485,7 +488,9 @@ xfer_link_map_member (so_list_ptr, lm)
 	}
 #endif
 
-      solib_map_sections (so_list_ptr);
+      catch_errors (solib_map_sections, (char *) so_list_ptr,
+		    "Error while mapping shared library sections:\n",
+		    RETURN_MASK_ALL);
     }
 }
 
@@ -570,7 +575,7 @@ symbol_add_stub (arg)
 
   if (so -> textsection)
     text_addr = so -> textsection -> addr;
-  else
+  else if (so -> abfd != NULL)
     {
       asection *lowest_sect;