elf: Strip zero-sized dynamic sections

[deliverable/binutils-gdb.git] / ld / lexsup.c

diff --git a/ld/lexsup.c b/ld/lexsup.c
index d7766c3c557cb751a70754818dd3938f020f0079..d1955b9afaba8c94055617e741ff798cf24792ba 100644 (file)
--- a/ld/lexsup.c
+++ b/ld/lexsup.c
@@ -1,5 +1,5 @@
 /* Parse options for the GNU linker.
-   Copyright (C) 1991-2019 Free Software Foundation, Inc.
+   Copyright (C) 1991-2020 Free Software Foundation, Inc.
 
    This file is part of the GNU Binutils.
 
@@ -122,6 +122,10 @@ static const struct ld_option ld_options[] =
     'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
   { {"no-export-dynamic", no_argument, NULL, OPTION_NO_EXPORT_DYNAMIC},
     '\0', NULL, N_("Undo the effect of --export-dynamic"), TWO_DASHES },
+  { {"enable-non-contiguous-regions", no_argument, NULL, OPTION_NON_CONTIGUOUS_REGIONS},
+    '\0', NULL, N_("Enable support of non-contiguous memory regions"), TWO_DASHES },
+  { {"enable-non-contiguous-regions-warnings", no_argument, NULL, OPTION_NON_CONTIGUOUS_REGIONS_WARNINGS},
+    '\0', NULL, N_("Enable warnings when --enable-non-contiguous-regions may cause unexpected behaviour"), TWO_DASHES },
   { {"EB", no_argument, NULL, OPTION_EB},
     '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
   { {"EL", no_argument, NULL, OPTION_EL},
@@ -565,7 +569,6 @@ parse_args (unsigned argc, char **argv)
   struct option *longopts;
   struct option *really_longopts;
   int last_optind;
-  enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
   enum symbolic_enum
   {
     symbolic_unset = 0,
@@ -845,6 +848,12 @@ parse_args (unsigned argc, char **argv)
        case OPTION_NO_EXPORT_DYNAMIC:
          link_info.export_dynamic = FALSE;
          break;
+       case OPTION_NON_CONTIGUOUS_REGIONS:
+         link_info.non_contiguous_regions = TRUE;
+         break;
+       case OPTION_NON_CONTIGUOUS_REGIONS_WARNINGS:
+         link_info.non_contiguous_regions_warnings = TRUE;
+         break;
        case 'e':
          lang_add_entry (optarg, TRUE);
          break;
@@ -928,6 +937,7 @@ parse_args (unsigned argc, char **argv)
             Use --call-shared or -Bdynamic for this.  */
          break;
        case 'n':
+         config.text_read_only = TRUE;
          config.magic_demand_paged = FALSE;
          input_flags.dynamic = FALSE;
          break;
@@ -947,15 +957,13 @@ parse_args (unsigned argc, char **argv)
          link_info.keep_memory = FALSE;
          break;
        case OPTION_NO_UNDEFINED:
-         link_info.unresolved_syms_in_objects
-           = how_to_report_unresolved_symbols;
+         link_info.unresolved_syms_in_objects = RM_DIAGNOSE;
          break;
        case OPTION_ALLOW_SHLIB_UNDEFINED:
          link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
          break;
        case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
-         link_info.unresolved_syms_in_shared_libs
-           = how_to_report_unresolved_symbols;
+         link_info.unresolved_syms_in_shared_libs = RM_DIAGNOSE;
          break;
        case OPTION_UNRESOLVED_SYMBOLS:
          if (strcmp (optarg, "ignore-all") == 0)
@@ -965,40 +973,27 @@ parse_args (unsigned argc, char **argv)
            }
          else if (strcmp (optarg, "report-all") == 0)
            {
-             link_info.unresolved_syms_in_objects
-               = how_to_report_unresolved_symbols;
-             link_info.unresolved_syms_in_shared_libs
-               = how_to_report_unresolved_symbols;
+             link_info.unresolved_syms_in_objects = RM_DIAGNOSE;
+             link_info.unresolved_syms_in_shared_libs = RM_DIAGNOSE;
            }
          else if (strcmp (optarg, "ignore-in-object-files") == 0)
            {
              link_info.unresolved_syms_in_objects = RM_IGNORE;
-             link_info.unresolved_syms_in_shared_libs
-               = how_to_report_unresolved_symbols;
+             link_info.unresolved_syms_in_shared_libs = RM_DIAGNOSE;
            }
          else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
            {
-             link_info.unresolved_syms_in_objects
-               = how_to_report_unresolved_symbols;
+             link_info.unresolved_syms_in_objects = RM_DIAGNOSE;
              link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
            }
          else
            einfo (_("%F%P: bad --unresolved-symbols option: %s\n"), optarg);
          break;
        case OPTION_WARN_UNRESOLVED_SYMBOLS:
-         how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
-         if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
-           link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
-         if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
-           link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
+         link_info.warn_unresolved_syms = TRUE;
          break;
-
        case OPTION_ERROR_UNRESOLVED_SYMBOLS:
-         how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
-         if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
-           link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
-         if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
-           link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
+         link_info.warn_unresolved_syms = FALSE;
          break;
        case OPTION_ALLOW_MULTIPLE_DEFINITION:
          link_info.allow_multiple_definition = TRUE;
@@ -1628,11 +1623,11 @@ parse_args (unsigned argc, char **argv)
 
   if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
     /* FIXME: Should we allow emulations a chance to set this ?  */
-    link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
+    link_info.unresolved_syms_in_objects = RM_DIAGNOSE;
 
   if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
     /* FIXME: Should we allow emulations a chance to set this ?  */
-    link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
+    link_info.unresolved_syms_in_shared_libs = RM_DIAGNOSE;
 
   if (bfd_link_relocatable (&link_info)
       && command_line.check_section_addresses < 0)