merge from gcc
[external/binutils.git] / ld / emultempl / pep.em
index 753f425..a315fd6 100644 (file)
@@ -97,8 +97,6 @@ fragment <<EOF
 #define PE_DEF_SECTION_ALIGNMENT       0x00000400
 #endif
 
-#define U(S) ${INITIAL_SYMBOL_CHAR} S
-
 static struct internal_extra_pe_aouthdr pep;
 static int dll;
 static int pep_subsystem = ${SUBSYSTEM};
@@ -175,6 +173,8 @@ enum options
   OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V2,
   OPTION_EXCLUDE_MODULES_FOR_IMPLIB,
   OPTION_USE_NUL_PREFIXED_IMPORT_TABLES,
+  OPTION_NO_LEADING_UNDERSCORE,
+  OPTION_LEADING_UNDERSCORE,
   OPTION_ENABLE_LONG_SECTION_NAMES,
   OPTION_DISABLE_LONG_SECTION_NAMES,
   OPTION_DYNAMIC_BASE,
@@ -216,6 +216,8 @@ gld${EMULATION_NAME}_add_options
     {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE},
     {"use-nul-prefixed-import-tables", no_argument, NULL,
      OPTION_USE_NUL_PREFIXED_IMPORT_TABLES},
+    {"no-leading-underscore", no_argument, NULL, OPTION_NO_LEADING_UNDERSCORE},
+    {"leading-underscore", no_argument, NULL, OPTION_LEADING_UNDERSCORE},
 #ifdef DLL_SUPPORT
     /* getopt allows abbreviations, so we do this to stop it
        from treating -o as an abbreviation for this option.  */
@@ -276,35 +278,52 @@ typedef struct
   bfd_vma value;
   char *symbol;
   int inited;
+  /* FALSE for an assembly level symbol and TRUE for a C visible symbol.
+     C visible symbols can be prefixed by underscore dependent on target's
+     settings.  */
+  bfd_boolean is_c_symbol;
 } definfo;
 
-#define D(field,symbol,def)  {&pep.field,sizeof(pep.field), def, symbol,0}
+#define GET_INIT_SYMBOL_NAME(IDX) \
+  (init[(IDX)].symbol \
+  + ((init[(IDX)].is_c_symbol == FALSE || pep_leading_underscore != 0) ? 0 : 1))
+
+/* Decorates the C visible symbol by underscore, if target requires.  */
+#define U(CSTR) \
+  (pep_leading_underscore == 0 ? CSTR : "_" CSTR)
+
+/* Get size of constant string for a possible underscore prefixed
+   C visible symbol.  */
+#define U_SIZE(CSTR) \
+  (sizeof (CSTR) + pep_leading_underscore == 0 ? 0 : 1)
+
+#define D(field,symbol,def,usc)  {&pep.field,sizeof(pep.field), def, symbol,0, usc}
 
 static definfo init[] =
 {
   /* imagebase must be first */
 #define IMAGEBASEOFF 0
-  D(ImageBase,"__image_base__", NT_EXE_IMAGE_BASE),
+  D(ImageBase,"__image_base__", NT_EXE_IMAGE_BASE, FALSE),
 #define DLLOFF 1
-  {&dll, sizeof(dll), 0, "__dll__", 0},
+  {&dll, sizeof(dll), 0, "__dll__", 0, FALSE},
 #define MSIMAGEBASEOFF 2
-  D(ImageBase, U("__ImageBase"), NT_EXE_IMAGE_BASE),
-  D(SectionAlignment,"__section_alignment__", PE_DEF_SECTION_ALIGNMENT),
-  D(FileAlignment,"__file_alignment__", PE_DEF_FILE_ALIGNMENT),
-  D(MajorOperatingSystemVersion,"__major_os_version__", 4),
-  D(MinorOperatingSystemVersion,"__minor_os_version__", 0),
-  D(MajorImageVersion,"__major_image_version__", 0),
-  D(MinorImageVersion,"__minor_image_version__", 0),
-  D(MajorSubsystemVersion,"__major_subsystem_version__", 5),
-  D(MinorSubsystemVersion,"__minor_subsystem_version__", 2),
-  D(Subsystem,"__subsystem__", ${SUBSYSTEM}),
-  D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x200000),
-  D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000),
-  D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000),
-  D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000),
-  D(LoaderFlags,"__loader_flags__", 0x0),
-  D(DllCharacteristics, "__dll_characteristics__", 0x0), 
-  { NULL, 0, 0, NULL, 0 }
+  D(ImageBase, "___ImageBase", NT_EXE_IMAGE_BASE, TRUE),
+  D(SectionAlignment,"__section_alignment__", PE_DEF_SECTION_ALIGNMENT, FALSE),
+  D(FileAlignment,"__file_alignment__", PE_DEF_FILE_ALIGNMENT, FALSE),
+  D(MajorOperatingSystemVersion,"__major_os_version__", 4, FALSE),
+  D(MinorOperatingSystemVersion,"__minor_os_version__", 0, FALSE),
+  D(MajorImageVersion,"__major_image_version__", 0, FALSE),
+  D(MinorImageVersion,"__minor_image_version__", 0, FALSE),
+  D(MajorSubsystemVersion,"__major_subsystem_version__", 5, FALSE),
+  D(MinorSubsystemVersion,"__minor_subsystem_version__", 2, FALSE),
+  D(Subsystem,"__subsystem__", ${SUBSYSTEM}, FALSE),
+  D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x200000, FALSE),
+  D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000, FALSE),
+  D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000, FALSE),
+  D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000, FALSE),
+  D(LoaderFlags,"__loader_flags__", 0x0, FALSE),
+  D(DllCharacteristics, "__dll_characteristics__", 0x0, FALSE),
+  { NULL, 0, 0, NULL, 0, FALSE}
 };
 
 
@@ -326,6 +345,7 @@ gld_${EMULATION_NAME}_list_options (FILE *file)
   fprintf (file, _("  --stack <size>                     Set size of the initial stack\n"));
   fprintf (file, _("  --subsystem <name>[:<version>]     Set required OS subsystem [& version]\n"));
   fprintf (file, _("  --support-old-code                 Support interworking with old code\n"));
+  fprintf (file, _("  --[no-]leading-underscore          Set explicit symbol underscore prefix mode\n"));
 #ifdef DLL_SUPPORT
   fprintf (file, _("  --add-stdcall-alias                Export symbols with and without @nn\n"));
   fprintf (file, _("  --disable-stdcall-fixup            Don't link _sym to _sym@nn\n"));
@@ -372,7 +392,7 @@ gld_${EMULATION_NAME}_list_options (FILE *file)
                                       be called in this image\n"));
   fprintf (file, _("  --no-bind                         Do not bind this image\n"));
   fprintf (file, _("  --wdmdriver               Driver uses the WDM model\n"));
-  fprintf (file, _("  --tsaware                 Image is Terminal Server aware\n"));
+  fprintf (file, _("  --tsaware                  Image is Terminal Server aware\n"));
 #endif
 }
 
@@ -385,12 +405,12 @@ set_pep_name (char *name, bfd_vma val)
   /* Find the name and set it.  */
   for (i = 0; init[i].ptr; i++)
     {
-      if (strcmp (name, init[i].symbol) == 0)
+      if (strcmp (name, GET_INIT_SYMBOL_NAME (i)) == 0)
        {
          init[i].value = val;
          init[i].inited = 1;
          if (strcmp (name,"__image_base__") == 0)
-           set_pep_name ("___ImageBase", val);
+           set_pep_name (U ("__ImageBase"), val);
          return;
        }
     }
@@ -402,7 +422,7 @@ set_entry_point (void)
 {
   const char *entry;
   const char *initial_symbol_char;
-  int i;
+  int i, u = -1;
 
   static const struct
     {
@@ -440,7 +460,19 @@ set_entry_point (void)
         entry = default_entry;
     }
 
-  initial_symbol_char = ${INITIAL_SYMBOL_CHAR};
+  /* Now we check target's default for getting proper symbol_char.  */
+  u = pep_leading_underscore;
+  if (u == -1 && !bfd_get_target_info ("${OUTPUT_FORMAT}", NULL, NULL, &u, NULL))
+    bfd_get_target_info ("${RELOCATEABLE_OUTPUT_FORMAT}", NULL, NULL, &u, NULL);
+
+  if (u == 0)
+    initial_symbol_char = "";
+  else if (u != -1)
+    initial_symbol_char = "_";
+  else
+    abort ();
+  pep_leading_underscore = u;
+
   if (*initial_symbol_char != '\0')
     {
       char *alc_entry;
@@ -627,6 +659,12 @@ gld${EMULATION_NAME}_handle_option (int optc)
     case OPTION_USE_NUL_PREFIXED_IMPORT_TABLES:
       pep_use_nul_prefixed_import_tables = TRUE;
       break;
+    case OPTION_NO_LEADING_UNDERSCORE:
+      pep_leading_underscore = 0;
+      break;
+    case OPTION_LEADING_UNDERSCORE:
+      pep_leading_underscore = 1;
+      break;
 #ifdef DLL_SUPPORT
     case OPTION_OUT_DEF:
       pep_out_def_filename = xstrdup (optarg);
@@ -815,7 +853,8 @@ gld_${EMULATION_NAME}_set_symbols (void)
     {
       bfd_vma val = init[j].value;
       lang_assignment_statement_type *rv;
-      rv = lang_add_assignment (exp_assop ('=', init[j].symbol,
+
+      rv = lang_add_assignment (exp_assop ('=', GET_INIT_SYMBOL_NAME (j),
                                           exp_intop (val)));
       if (init[j].size == sizeof (short))
        *(short *) init[j].ptr = (short) val;
@@ -1076,14 +1115,14 @@ This should work unless it involves constant data structures referencing symbols
 
              for (i = 0; i < nsyms; i++)
                {
-                 if (! CONST_STRNEQ (symbols[i]->name, "__head_"))
+                 if (! CONST_STRNEQ (symbols[i]->name, U ("_head_")))
                    continue;
 
                  if (pep_dll_extra_pe_debug)
                    printf ("->%s\n", symbols[i]->name);
 
                  pep_data_import_dll = (char*) (symbols[i]->name +
-                                               sizeof ("__head_") - 1);
+                                                U_SIZE ("_head_") - 1);
                  break;
                }
 
@@ -1431,7 +1470,7 @@ saw_option (char *option)
   int i;
 
   for (i = 0; init[i].ptr; i++)
-    if (strcmp (init[i].symbol, option) == 0)
+    if (strcmp (GET_INIT_SYMBOL_NAME (i), option) == 0)
       return init[i].inited;
   return 0;
 }
@@ -1465,7 +1504,8 @@ gld_${EMULATION_NAME}_unrecognized_file (lang_input_statement_type *entry ATTRIB
            {
              struct bfd_link_hash_entry *h;
 
-             sprintf (buf, "_%s", pep_def_file->exports[i].internal_name);
+             sprintf (buf, "%s%s", U (""),
+                      pep_def_file->exports[i].internal_name);
 
              h = bfd_link_hash_lookup (link_info.hash, buf, TRUE, TRUE, TRUE);
              if (h == (struct bfd_link_hash_entry *) NULL)
@@ -1582,6 +1622,7 @@ gld_${EMULATION_NAME}_place_orphan (asection *s,
   char *dollar = NULL;
   lang_output_section_statement_type *os;
   lang_statement_list_type add_child;
+  lang_output_section_statement_type *match_by_name = NULL;
   lang_statement_union_type **pl;
 
   /* Look through the script to see where to place this section.  */
@@ -1620,8 +1661,21 @@ gld_${EMULATION_NAME}_place_orphan (asection *s,
            lang_add_section (&add_child, s, os);
            break;
          }
+
+       /* Save unused output sections in case we can match them
+          against orphans later.  */
+       if (os->bfd_section == NULL)
+         match_by_name = os;
       }
 
+  /* If we didn't match an active output section, see if we matched an
+     unused one and use that.  */
+  if (os == NULL && match_by_name)
+    {
+      lang_add_section (&match_by_name->children, s, match_by_name);
+      return match_by_name;
+    }
+
   if (os == NULL)
     {
       static struct orphan_save hold[] =