Implement generic debugging support. Implement a stabs reader and

	a generic printer.
	* budbg.h, debug.c, debug.h, prdbg.c, rddbg.c, stabs.c: New files.
	* objdump.c: Include "debug.h" and "budbg.h".
	(dump_debugging): New global variable.
	(usage): Mention --debugging.
	(long_options): Add "debugging".
	(display_bfd): Handle --debugging.
	* Makefile.in (OBJDUMP_OBJS): New variable.
	($(OBJDUMP_PROG)): Use $(OBJDUMP_OBJS).
	* binutils.texi, objdump.1: Document --debugging.

1 files changed, 195 insertions, 0 deletions

diff --git a/binutils/rddbg.c b/binutils/rddbg.c
new file mode 100644
index 0000000..8559621
--- /dev/null
+++ b/binutils/rddbg.c
@@ -0,0 +1,195 @@
+/* rddbg.c -- Read debugging information into a generic form.
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Ian Lance Taylor <ian@cygnus.com>.
+
+   This file is part of GNU Binutils.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+/* This file reads debugging information into a generic form.  This
+   file knows how to dig the debugging information out of an object
+   file.  */
+
+#include "bfd.h"
+#include "bucomm.h"
+#include "libiberty.h"
+#include "debug.h"
+#include "budbg.h"
+
+static boolean read_section_stabs_debugging_info
+  PARAMS ((bfd *, PTR, boolean *));
+
+/* Read debugging information from a BFD.  Returns a generic debugging
+   pointer.  */
+
+PTR
+read_debugging_info (abfd)
+     bfd *abfd;
+{
+  PTR dhandle;
+  boolean found;
+
+  dhandle = debug_init ();
+  if (dhandle == NULL)
+    return NULL;
+
+  /* All we know about right now is stabs in sections.  */
+
+  if (! read_section_stabs_debugging_info (abfd, dhandle, &found))
+    return NULL;
+
+  if (! found)
+    {
+      fprintf (stderr, "%s: no recognized debugging information\n",
+	       bfd_get_filename (abfd));
+      return NULL;
+    }
+
+  return dhandle;
+}
+
+/* Read stabs in sections debugging information from a BFD.  */
+
+static boolean
+read_section_stabs_debugging_info (abfd, dhandle, pfound)
+     bfd *abfd;
+     PTR dhandle;
+     boolean *pfound;
+{
+  static struct
+    {
+      const char *secname;
+      const char *strsecname;
+    } names[] = { { ".stab", ".stabstr" } };
+  unsigned int i;
+  PTR shandle;
+
+  *pfound = false;
+  shandle = NULL;
+
+  for (i = 0; i < sizeof names / sizeof names[0]; i++)
+    {
+      asection *sec, *strsec;
+
+      sec = bfd_get_section_by_name (abfd, names[i].secname);
+      strsec = bfd_get_section_by_name (abfd, names[i].strsecname);
+      if (sec != NULL && strsec != NULL)
+	{
+	  bfd_size_type stabsize, strsize;
+	  bfd_byte *stabs, *strings;
+	  bfd_byte *stab;
+	  bfd_size_type stroff, next_stroff;
+
+	  stabsize = bfd_section_size (abfd, sec);
+	  stabs = (bfd_byte *) xmalloc (stabsize);
+	  if (! bfd_get_section_contents (abfd, sec, stabs, 0, stabsize))
+	    {
+	      fprintf (stderr, "%s: %s: %s\n",
+		       bfd_get_filename (abfd), names[i].secname,
+		       bfd_errmsg (bfd_get_error ()));
+	      return false;
+	    }
+
+	  strsize = bfd_section_size (abfd, strsec);
+	  strings = (bfd_byte *) xmalloc (strsize);
+	  if (! bfd_get_section_contents (abfd, strsec, strings, 0, strsize))
+	    {
+	      fprintf (stderr, "%s: %s: %s\n",
+		       bfd_get_filename (abfd), names[i].strsecname,
+		       bfd_errmsg (bfd_get_error ()));
+	      return false;
+	    }
+
+	  if (shandle == NULL)
+	    {
+	      shandle = start_stab (dhandle);
+	      if (shandle == NULL)
+		return false;
+	    }
+
+	  *pfound = true;
+
+	  stroff = 0;
+	  next_stroff = 0;
+	  for (stab = stabs; stab < stabs + stabsize; stab += 12)
+	    {
+	      bfd_size_type strx;
+	      int type;
+	      int other;
+	      int desc;
+	      bfd_vma value;
+
+	      /* This code presumes 32 bit values.  */
+
+	      strx = bfd_get_32 (abfd, stab);
+	      type = bfd_get_8 (abfd, stab + 4);
+	      other = bfd_get_8 (abfd, stab + 5);
+	      desc = bfd_get_16 (abfd, stab + 6);
+	      value = bfd_get_32 (abfd, stab + 8);
+
+	      if (type == 0)
+		{
+		  /* Special type 0 stabs indicate the offset to the
+                     next string table.  */
+		  stroff = next_stroff;
+		  next_stroff += value;
+		}
+	      else
+		{
+		  char *f, *s;
+
+		  f = NULL;
+		  s = (char *) strings + stroff + strx;
+		  while (s[strlen (s) - 1] == '\\'
+			 && stab + 12 < stabs + stabsize)
+		    {
+		      stab += 12;
+		      s[strlen (s) - 1] = '\0';
+		      s = concat (s,
+				  ((char *) strings
+				   + stroff
+				   + bfd_get_32 (abfd, stab)),
+				  (const char *) NULL);
+		      if (f != NULL)
+			free (f);
+		      f = s;
+		    }
+
+		  if (! parse_stab (dhandle, shandle, type, desc, value, s))
+		    return false;
+
+		  /* Don't free f, since I think the stabs code
+                     expects strings to hang around.  This should be
+                     straightened out.  FIXME.  */
+		}
+	    }
+
+	  free (stabs);
+
+	  /* Don't free strings, since I think the stabs code expects
+             the strings to hang around.  This should be straightened
+             out.  FIXME.  */
+	}
+    }
+
+  if (shandle != NULL)
+    {
+      if (! finish_stab (dhandle, shandle))
+	return false;
+    }
+
+  return true;
+}