Change readelf's display of symbol names (when not in --wide mode) so that if they are going to be truncated then "[...]" is displayed at the end. Add a comment line option to disable this enhancement and restore the old behaviour.

PR 26028
binutils* readelf.c (print_symbol): Handle truncation of symbol names.
	(options): Add -T/--silent-truncation option.
	(parse_args): Handle the option.
	(print_dynamic_symbol): Correct calculation of width available to
	display symbol name.
	* doc/binutils.texi: Document the -T option to readelf.
	* NEWS: Mention the new feature.

gas	* testsuite/gas/ia64/group-2.d: Add -T option to readelf
	command line.
	* testsuite/gas/ia64/unwind.d: Likewise.
	* testsuite/gas/mmix/bspec-1.d: Likewise.
	* testsuite/gas/mmix/bspec-2.d: Likewise.
	* testsuite/gas/mmix/comment-1.d: Likewise.
	* testsuite/gas/tic6x/scomm-directive-4.d: Likewise.

ld	* testsuite/ld-powerpc/powerpc.exp: Add -T option to readelf
	command line when running some tests.
	* testsuite/ld-arm/arm-elf.exp: Likewise.
	* testsuite/ld-mips-elf/mips-elf.exp: Likewise.
	* testsuite/ld-mmix/local1.d: Likewise.
	* testsuite/ld-mmix/local3.d: Likewise.
	* testsuite/ld-mmix/local5.d: Likewise.
	* testsuite/ld-mmix/local7.d: Likewise.
	* testsuite/ld-powerpc/powerpc.exp: Likewise.

binutils/ChangeLog

@@ -1,3 +1,14 @@
+2020-07-02  Nick Clifton  <nickc@redhat.com>
+
+	PR 26028
+	* readelf.c (print_symbol): Handle truncation of symbol names.
+	(options): Add -T/--silent-truncation option.
+	(parse_args): Handle the option.
+	(print_dynamic_symbol): Correct calculation of width available to
+	display symbol name.
+	* doc/binutils.texi: Document the -T option to readelf.
+	* NEWS: Mention the new feature.
+
 2020-06-30  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* NEWS: Mention x86 NaCl target support removal.

binutils/NEWS

@@ -1,5 +1,11 @@
 -*- text -*-
 
+* Changed readelf's display of symbol names when wide mode is not enabled.
+  If the name is too long it will be truncated and the last five characters
+  replaced with "[...]".  The old behaviour of displaying 5 more characters but
+  not indicating that truncation has happened can be restored by the use of the
+  -T or --silent-truncation options.
+
 * X86 NaCl target support is removed.
 
 * The readelf tool now has a -L or --lint or --enable-checks option which turns

binutils/doc/binutils.texi

@@ -4726,6 +4726,7 @@ readelf [@option{-a}|@option{--all}]
         [@option{-I}|@option{--histogram}]
         [@option{-v}|@option{--version}]
         [@option{-W}|@option{--wide}]
+        [@option{-T}|@option{--silent-truncation}]
         [@option{-H}|@option{--help}]
         @var{elffile}@dots{}
 @c man end
@@ -4939,6 +4940,15 @@ Don't break output lines to fit into 80 columns. By default
 @command{readelf} to print each section header resp. each segment one a
 single line, which is far more readable on terminals wider than 80 columns.
 
+@item -T
+@itemx --silent-truncation
+Normally when readelf is displaying a symbol name, and it has to
+truncate the name to fit into an 80 column display, it will add a
+suffix of @code{[...]} to the name.  This command line option
+disables this behaviour, allowing 5 more characters of the name to be
+displayed and restoring the old behaviour of readelf (prior to release
+2.35).
+
 @item -H
 @itemx --help
 Display the command-line options understood by @command{readelf}.

binutils/readelf.c

@@ -234,6 +234,7 @@ static bfd_boolean do_archive_index = FALSE;
 static bfd_boolean check_all = FALSE;
 static bfd_boolean is_32bit_elf = FALSE;
 static bfd_boolean decompress_dumps = FALSE;
+static bfd_boolean do_not_show_symbol_truncation = FALSE;
 
 static char *dump_ctf_parent_name;
 static char *dump_ctf_symtab_name;
@@ -533,15 +534,19 @@ print_vma (bfd_vma vma, print_mode mode)
 
    Display at most abs(WIDTH) characters, truncating as necessary, unless do_wide is true.
 
+   If truncation will happen and do_not_show_symbol_truncation is FALSE then display
+   abs(WIDTH) - 5 characters followed by "[...]".
+
    If WIDTH is negative then ensure that the output is at least (- WIDTH) characters,
    padding as necessary.
 
    Returns the number of emitted characters.  */
 
 static unsigned int
-print_symbol (signed int width, const char *symbol)
+print_symbol (signed int width, const char * symbol)
 {
   bfd_boolean extra_padding = FALSE;
+  bfd_boolean do_dots = FALSE;
   signed int num_printed = 0;
 #ifdef HAVE_MBSTATE_T
   mbstate_t state;
@@ -562,7 +567,17 @@ print_symbol (signed int width, const char *symbol)
        This simplifies the code below.  */
     width_remaining = INT_MAX;
   else
-    width_remaining = width;
+    {
+      width_remaining = width;
+      if (! do_not_show_symbol_truncation
+	  && (int) strlen (symbol) > width)
+	{
+	  width_remaining -= 5;
+	  if ((int) width_remaining < 0)
+	    width_remaining = 0;
+	  do_dots = TRUE;
+	}
+    }
 
 #ifdef HAVE_MBSTATE_T
   /* Initialise the multibyte conversion state.  */
@@ -618,6 +633,9 @@ print_symbol (signed int width, const char *symbol)
 	}
     }
 
+  if (do_dots)
+    num_printed += printf ("[...]");
+
   if (extra_padding && num_printed < width)
     {
       /* Fill in the remaining spaces.  */
@@ -4512,6 +4530,7 @@ static struct option options[] =
 
   {"version",	       no_argument, 0, 'v'},
   {"wide",	       no_argument, 0, 'W'},
+  {"silent-truncation",no_argument, 0, 'T'},
   {"help",	       no_argument, 0, 'H'},
   {0,		       no_argument, 0, 0}
 };
@@ -4579,6 +4598,7 @@ usage (FILE * stream)
   fprintf (stream, _("\
   -I --histogram         Display histogram of bucket list lengths\n\
   -W --wide              Allow output width to exceed 80 characters\n\
+  -T --silent-truncation If a symbol name is truncated, do not add a suffix [...]\n\
   @<file>                Read options from <file>\n\
   -H --help              Display this information\n\
   -v --version           Display the version number of readelf\n"));
@@ -4673,7 +4693,7 @@ parse_args (struct dump_data *dumpdata, int argc, char ** argv)
     usage (stderr);
 
   while ((c = getopt_long
-	  (argc, argv, "ADHILNR:SVWacdeghi:lnp:rstuvw::x:z", options, NULL)) != EOF)
+	  (argc, argv, "ADHILNR:STVWacdeghi:lnp:rstuvw::x:z", options, NULL)) != EOF)
     {
       switch (c)
 	{
@@ -4832,6 +4852,9 @@ parse_args (struct dump_data *dumpdata, int argc, char ** argv)
 	case 'W':
 	  do_wide = TRUE;
 	  break;
+	case 'T':
+	  do_not_show_symbol_truncation = TRUE;
+	  break;
 	default:
 	  /* xgettext:c-format */
 	  error (_("Invalid option '-%c'\n"), c);
@@ -12032,7 +12055,7 @@ print_dynamic_symbol (Filedata *filedata, unsigned long si,
   enum versioned_symbol_info sym_info;
   unsigned short vna_other;
   Elf_Internal_Sym *psym = symtab + si;
-
+  
   printf ("%6ld: ", si);
   print_vma (psym->st_value, LONG_HEX);
   putchar (' ');
@@ -12053,9 +12076,10 @@ print_dynamic_symbol (Filedata *filedata, unsigned long si,
 	printf (" [%s] ", get_symbol_other (filedata, psym->st_other ^ vis));
     }
   printf (" %4s ", get_symbol_index_type (filedata, psym->st_shndx));
-  print_symbol (25, VALID_SYMBOL_NAME (strtab, strtab_size,
+
-				       psym->st_name)
+  bfd_boolean is_valid = VALID_SYMBOL_NAME (strtab, strtab_size,
-		? strtab + psym->st_name : _("<corrupt>"));
+					    psym->st_name);
+  const char * sstr = is_valid  ? strtab + psym->st_name : _("<corrupt>");
 
   version_string
     = get_symbol_version_string (filedata,
@@ -12063,6 +12087,22 @@ print_dynamic_symbol (Filedata *filedata, unsigned long si,
 				  || section->sh_type == SHT_DYNSYM),
 				 strtab, strtab_size, si,
 				 psym, &sym_info, &vna_other);
+  
+  int len_avail = 21;
+  if (! do_wide && version_string != NULL)
+    {
+      char buffer[256];
+
+      len_avail -= sprintf (buffer, "@%s", version_string);
+
+      if (sym_info == symbol_undefined)
+	len_avail -= sprintf (buffer," (%d)", vna_other);
+      else if (sym_info != symbol_hidden)
+	len_avail -= 1;
+    }
+
+  print_symbol (len_avail, sstr);
+    
   if (version_string)
     {
       if (sym_info == symbol_undefined)

gas/ChangeLog

@@ -1,3 +1,14 @@
+2020-07-02  Nick Clifton  <nickc@redhat.com>
+
+	PR 26028
+	* testsuite/gas/ia64/group-2.d: Add -T option to readelf
+	command line.
+	* testsuite/gas/ia64/unwind.d: Likewise.
+	* testsuite/gas/mmix/bspec-1.d: Likewise.
+	* testsuite/gas/mmix/bspec-2.d: Likewise.
+	* testsuite/gas/mmix/comment-1.d: Likewise.
+	* testsuite/gas/tic6x/scomm-directive-4.d: Likewise.
+
 2020-07-01  Alan Modra  <amodra@gmail.com>
 
 	* config/tc-xc16x.c (md_apply_fix): Add FIXME.

gas/testsuite/gas/ia64/group-2.d

@@ -1,4 +1,4 @@
-#readelf: -Sg
+#readelf: -Sg -T
 #as: -x
 #name: ia64 unwind group
 

gas/testsuite/gas/ia64/unwind.d

@@ -1,4 +1,4 @@
-#readelf: -S
+#readelf: -S -T
 #name: ia64 unwind section
 
 There are 9 section headers, starting at offset .*:

gas/testsuite/gas/mmix/bspec-1.d

@@ -1,4 +1,4 @@
-#readelf: -Ssr -x1 -x4
+#readelf: -Ssr -T -x1 -x4
 There are 9 section headers, starting at offset .*:
 #...
  +\[ 4\] \.MMIX\.spec_data\.2 +PROGBITS +0+ +0+44

gas/testsuite/gas/mmix/bspec-2.d

@@ -1,4 +1,4 @@
-#readelf: -Sr -x1 -x4
+#readelf: -Sr -T -x1 -x4
 There are 11 section headers, starting at offset .*:
 #...
   \[ 4\] \.MMIX\.spec_data\.2 PROGBITS         0+  0+48

gas/testsuite/gas/mmix/comment-1.d

@@ -1,5 +1,5 @@
 #as: -no-expand
-#readelf: -Ssrx1 -x6
+#readelf: -Ssrx1 -T -x6
 There are 10 section headers, starting at offset 0x...:
 #...
  +\[ 5\] \.MMIX\.spec_data\.4 +PROGBITS +0+ +0+c4

gas/testsuite/gas/tic6x/scomm-directive-4.d

@@ -1,7 +1,7 @@
 #name: C6X .scomm directive 4
 #as:
 #source: scomm-directive-4.s
-#readelf: -Ss
+#readelf: -Ss -T
 
 There are 8 section headers, starting at offset .*:
 

ld/ChangeLog

@@ -1,3 +1,16 @@
+2020-07-02  Nick Clifton  <nickc@redhat.com>
+
+	PR 26028
+	* testsuite/ld-powerpc/powerpc.exp: Add -T option to readelf
+	command line when running some tests.
+	* testsuite/ld-arm/arm-elf.exp: Likewise.
+	* testsuite/ld-mips-elf/mips-elf.exp: Likewise.
+	* testsuite/ld-mmix/local1.d: Likewise.
+	* testsuite/ld-mmix/local3.d: Likewise.
+	* testsuite/ld-mmix/local5.d: Likewise.
+	* testsuite/ld-mmix/local7.d: Likewise.
+	* testsuite/ld-powerpc/powerpc.exp: Likewise.
+
 2020-06-30  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* Makefile.am (ALL_EMULATION_SOURCES): Remove eelf_i386_nacl.c,

ld/testsuite/ld-arm/arm-elf.exp

@@ -794,7 +794,7 @@ set armeabitests_nonacl {
      "--section-start .gnu.sgstubs=0x20000 --out-implib=tmpdir/cmse-implib.lib --cmse-implib" ""
      "-march=armv8-m.base -mthumb --defsym VER=1"
      {cmse-implib.s}
-     {{readelf {-s tmpdir/cmse-implib.lib} cmse-implib.rd}
+     {{readelf {-s --wide tmpdir/cmse-implib.lib} cmse-implib.rd}
       {readelf {-h tmpdir/cmse-implib.lib} cmse-implib.type}}
      "cmse-implib"}
     {"Input secure gateway import library"
@@ -802,7 +802,7 @@ set armeabitests_nonacl {
      "-march=armv8-m.base -mthumb --defsym VER=2"
      {cmse-implib.s}
      {{ld cmse-new-implib.out}
-      {readelf {-s tmpdir/cmse-new-implib.lib} cmse-new-implib.rd}}
+      {readelf {-s --wide tmpdir/cmse-new-implib.lib} cmse-new-implib.rd}}
      "cmse-new-implib"}
     {"Input secure gateway import library: no output import library"
      "--section-start .gnu.sgstubs=0x20000 --in-implib=tmpdir/cmse-implib.lib --cmse-implib" ""
@@ -832,7 +832,7 @@ set armeabitests_nonacl {
      "--section-start .gnu.sgstubs=0x20000 --out-implib=tmpdir/cmse-new-comeback-implib.lib --in-implib=tmpdir/cmse-implib.lib --cmse-implib" ""
      "-march=armv8-m.base -mthumb --defsym VER=3"
      {cmse-implib.s}
-     {{readelf {-s tmpdir/cmse-new-comeback-implib.lib} cmse-new-comeback-implib.rd}}
+     {{readelf {-s --wide tmpdir/cmse-new-comeback-implib.lib} cmse-new-comeback-implib.rd}}
      "cmse-new-comeback-implib"}
     {"Input secure gateway import library: entry function change"
      "--section-start .gnu.sgstubs=0x20000 --out-implib=tmpdir/cmse-new-wrong-implib.lib --in-implib=tmpdir/cmse-implib.lib --cmse-implib" ""

ld/testsuite/ld-mips-elf/mips-elf.exp

@@ -29,7 +29,7 @@ if {[istarget "mips*-*-vxworks"]} {
 	{"VxWorks executable test 1 (dynamic)" \
 	 "tmpdir/libvxworks1.so -Tvxworks1.ld -q --force-dynamic" ""
 	 "-mips2" {vxworks1.s}
-	 {{readelf --relocs vxworks1.rd} {objdump -dr vxworks1.dd}}
+        {{readelf {--relocs -T} vxworks1.rd} {objdump -dr vxworks1.dd}}
 	 "vxworks1"}
 	{"VxWorks executable test 2 (dynamic)" \
 	 "-Tvxworks1.ld -q --force-dynamic" ""
@@ -1575,7 +1575,7 @@ proc run_mips_undefweak_test { name abi args } {
 		[list \
 		    [list objdump -d pr21375${objsuf}.dd] \
 		    [list readelf -A pr21375${rdesuf}.gd] \
-		    [list readelf --dyn-syms pr21375${rdesuf}${irixsuf}.sd] \
+		    [list readelf {--dyn-syms --wide} pr21375${rdesuf}${irixsuf}.sd] \
 		    [list readelf -h pr21375${abisuf}.hd]] \
 		"pr21375${binsuf}${dsosuf}"]]
     }

ld/testsuite/ld-mmix/local1.d

@@ -4,7 +4,7 @@
 #source: regext1.s
 #source: start.s
 #ld: -m elf64mmix
-#readelf: -Ssx1 -x2
+#readelf: -Ssx1 -T -x2
 
 # We check that the externally visible symbol ext1 is a local register
 # (different meaning of "local" than for symbol), which can be seen as

ld/testsuite/ld-mmix/local3.d

@@ -4,7 +4,7 @@
 #source: ext1.s
 #source: start.s
 #ld: -m elf64mmix
-#readelf: -Ssx1 -x2
+#readelf: -Ssx1 -T -x2
 
 # Like local1, but ext1 is here a constant, not a global register.
 

ld/testsuite/ld-mmix/local5.d

@@ -5,7 +5,7 @@
 #source: regext1.s
 #source: start.s
 #ld: -m elf64mmix
-#readelf: -Ssx1 -x2
+#readelf: -Ssx1 -T -x2
 
 # Like local1, but with two checks for a local register.
 

ld/testsuite/ld-mmix/local7.d

@@ -5,7 +5,7 @@
 #source: ext1.s
 #source: start.s
 #ld: -m elf64mmix
-#readelf: -Ssx1 -x2
+#readelf: -Ssx1 -T -x2
 
 # Like local1, but ext1 is here a constant, not a global register and two
 # local-register checks.

ld/testsuite/ld-powerpc/powerpc.exp

@@ -32,13 +32,13 @@ if {[istarget "*-*-vxworks"]} {
 	{"VxWorks shared library test 1"
 	 "-shared --hash-style=sysv -Tvxworks1.ld" ""
 	 "-mregnames" {vxworks1-lib.s}
-	 {{readelf --relocs vxworks1-lib.rd} {objdump -dr vxworks1-lib.dd}
+         {{readelf {--relocs -T} vxworks1-lib.rd} {objdump -dr vxworks1-lib.dd}
 	  {readelf --symbols vxworks1-lib.nd} {readelf -d vxworks1-lib.td}}
 	 "libvxworks1.so"}
 	{"VxWorks executable test 1 (dynamic)" \
 	 "tmpdir/libvxworks1.so -Tvxworks1.ld -q --force-dynamic --hash-style=sysv" ""
 	 "-mregnames" {vxworks1.s}
-	 {{readelf --relocs vxworks1.rd} {objdump -dr vxworks1.dd}}
+         {{readelf {--relocs -T} vxworks1.rd} {objdump -dr vxworks1.dd}}
 	 "vxworks1"}
 	{"VxWorks executable test 2 (dynamic)" \
 	 "-Tvxworks1.ld -q --force-dynamic --hash-style=sysv" ""
@@ -58,7 +58,7 @@ if {[istarget "*-*-vxworks"]} {
 	{"VxWorks relocatable relax test"
 	 "-Tvxworks1.ld -r --relax -q --hash-style=sysv" ""
 	 "-mregnames" {vxworks-relax-2.s}
-	 {{readelf --relocs vxworks-relax-2.rd}}
+         {{readelf {--relocs -T} vxworks-relax-2.rd}}
 	 "vxworks-relax-2"}
     }
     run_ld_link_tests $ppcvxtests