Add a warning if an emtpty SHT_REL, SHT_RELA or SHT_PROGBITS section is detected. Disable all warnings unless the (new) lint mode is enabled.

	* readelf.c (warn): New function - like elfcomm.c version but only
	produces output if warnings are enabled.
	(struct options): Add --lint and --enable-checks.
	(usage): Add entry for --lint.
	(parse_args): Handle -L.  If checks are enabled but no dumps have
	been selected then enable all dumps.
	(process_section_headers): Replace long if-then-else sequence with
	a switch.  Add warning messages for empty SHT_REL, SHT_RELA and
	SHT_PROGBITS sections.
	(process_file): Do not complain if the file is an archive and lint
	mode has been enabled.
	* elfcomm.c (error): Make the function weak.
	(warn): Likewise.
	* NEWS: Mention the new feature.
	* doc/binutils.texi: Document the new feature.
	* dwarf.h (report_leb_status): Add file name and line number
	parameters.  Include them in the diagnostic output.
	(READ_ULEB): Pass file and line number to report_leb_status.
	(READ_SLEB): Likewise.
	* dwarf.c (read_and_print_leb128): Pass file and line number to
	report_leb_status.
	* testsuite/binutils-all/readelf.exp: Add test of new feature.
	* testsuite/binutils-all/zero-sec.s: New test source file.
	* testsuite/binutils-all/zero-sec.r: Expected output from new
	test.

1 files changed, 10 insertions, 0 deletions

diff --git a/binutils/doc/binutils.texi b/binutils/doc/binutils.texi
index 0da0492..9a3a40f 100644
--- a/binutils/doc/binutils.texi
+++ b/binutils/doc/binutils.texi
@@ -4706,6 +4706,7 @@ readelf [@option{-a}|@option{--all}]
         [@option{-V}|@option{--version-info}]
         [@option{-A}|@option{--arch-specific}]
         [@option{-D}|@option{--use-dynamic}]
+        [@option{-L}|@option{--lint}|@option{--enable-checks}]
         [@option{-x} <number or name>|@option{--hex-dump=}<number or name>]
         [@option{-p} <number or name>|@option{--string-dump=}<number or name>]
         [@option{-R} <number or name>|@option{--relocated-dump=}<number or name>]
@@ -4862,6 +4863,15 @@ symbol table sections.
 When displaying relocations, this option makes @command{readelf}
 display the dynamic relocations rather than the static relocations.
 
+@item -L
+@itemx --lint
+@itemx --enable-checks
+Displays warning messages about possible problems with the file(s)
+being examined.  If used on its own then all of the contents of the
+file(s) will be examined.  If used with one of the dumping options
+then the warning messages will only be produced for the things being
+displayed.
+
 @item -x <number or name>
 @itemx --hex-dump=<number or name>
 Displays the contents of the indicated section as a hexadecimal bytes.