* elflink.c (_bfd_elf_gc_mark_extra_sections): Remove mark from

	fragmented .debug_line sections associated with unmarked code
	sections.

	* dwarf.c (read_debug_line_header): New function.  Reads in a
	header in a .debug_line section.
	(display_debug_lines_raw): Use new function.  Handle fragmentary
	.debug_line sections.
	(display_debug_lines_decoded): Likewise.
	* readelf.c (process_section_headers): Handle fragmenatry
	.debug_line sections.
	(display_debug_section): Likewise.

	* as.c (Options): Add -gdwarf-sections.
	(parse_args): Likewise.
	* as.h (flag_dwarf_sections): Declare.
	* dwarf2dbg.c (emit_fixed_inc_line_addr): Skip section changes.
	(process_entries): When -gdwarf-sections is enabled generate
	fragmentary .debug_line sections.
	(out_debug_line): Set the section for the .debug_line section end
	symbol.
	* doc/as.texinfo: Document -gdwarf-sections.
	* NEWS: Mention -gdwarf-sections.

	* gas/elf/dwarf2-3.d: Fix expected readelf output.

	* scripttempl/DWARF.sc: Add support for .debug_line.* and
	.debug_line_end.

1 files changed, 14 insertions, 10 deletions

diff --git a/gas/doc/as.texinfo b/gas/doc/as.texinfo
index 1476c14676..9c55ef4e4b 100644
--- a/gas/doc/as.texinfo
+++ b/gas/doc/as.texinfo
@@ -1,7 +1,5 @@
 \input texinfo @c                               -*-Texinfo-*-
-@c  Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
-@c  2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
-@c  Free Software Foundation, Inc.
+@c  Copyright 1991-2013 Free Software Foundation, Inc.
 @c UPDATE!!  On future updates--
 @c   (1)   check for new machine-dep cmdline options in
 @c         md_parse_option definitions in config/tc-*.c
@@ -102,9 +100,7 @@
 This file documents the GNU Assembler "@value{AS}".
 
 @c man begin COPYRIGHT
-Copyright @copyright{} 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-2000, 2001, 2002, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation,
-Inc.
+Copyright @copyright{} 1991-2013 Free Software Foundation, Inc.
 
 Permission is granted to copy, distribute and/or modify this document
 under the terms of the GNU Free Documentation License, Version 1.3
@@ -153,9 +149,7 @@ done.
 @end tex
 
 @vskip 0pt plus 1filll
-Copyright @copyright{} 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-2000, 2001, 2002, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation,
-Inc.
+Copyright @copyright{} 1991-2013 Free Software Foundation, Inc.
 
       Permission is granted to copy, distribute and/or modify this document
       under the terms of the GNU Free Documentation License, Version 1.3
@@ -236,7 +230,8 @@ gcc(1), ld(1), and the Info entries for @file{binutils} and @file{ld}.
  [@b{--compress-debug-sections}]  [@b{--nocompress-debug-sections}]
  [@b{--debug-prefix-map} @var{old}=@var{new}]
  [@b{--defsym} @var{sym}=@var{val}] [@b{-f}] [@b{-g}] [@b{--gstabs}]
- [@b{--gstabs+}] [@b{--gdwarf-2}] [@b{--help}] [@b{-I} @var{dir}] [@b{-J}]
+ [@b{--gstabs+}] [@b{--gdwarf-2}] [@b{--gdwarf-sections}]
+ [@b{--help}] [@b{-I} @var{dir}] [@b{-J}]
  [@b{-K}] [@b{-L}] [@b{--listing-lhs-width}=@var{NUM}]
  [@b{--listing-lhs-width2}=@var{NUM}] [@b{--listing-rhs-width}=@var{NUM}]
  [@b{--listing-cont-lines}=@var{NUM}] [@b{--keep-locals}] [@b{-o}
@@ -648,6 +643,15 @@ Generate DWARF2 debugging information for each assembler line.  This
 may help debugging assembler code, if the debugger can handle it.  Note---this
 option is only supported by some targets, not all of them.
 
+@item --gdwarf-sections
+Instead of creating a .debug_line section, create a series of
+.debug_line.@var{foo} sections where @var{foo} is the name of the
+corresponding code section.  For example a code section called @var{.text.func}
+will have its dwarf line number information placed into a section called
+@var{.debug_line.text.func}.  If the code section is just called @var{.text}
+then debug line section will still be called just @var{.debug_line} without any
+suffix.
+
 @item --size-check=error
 @itemx --size-check=warning
 Issue an error or warning for invalid ELF .size directive.