Add support for PowerPC VLE.

[deliverable/binutils-gdb.git] / ld / emultempl / ppc64elf.em

diff --git a/ld/emultempl/ppc64elf.em b/ld/emultempl/ppc64elf.em
index 0a49c5ba4cf8dc0c9d3899840379d5ab3559f8c0..40882ab7bf3e62da5b633c64e081f9570647b3d3 100644 (file)
--- a/ld/emultempl/ppc64elf.em
+++ b/ld/emultempl/ppc64elf.em
@@ -1,5 +1,5 @@
 # This shell script emits a C file. -*- C -*-
-# Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+# Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
 # Free Software Foundation, Inc.
 #
 # This file is part of the GNU Binutils.
@@ -62,7 +62,13 @@ static int no_multi_toc = 0;
 static int no_toc_sort = 0;
 
 /* Set if PLT call stubs should load r11.  */
-static int plt_static_chain = 0;
+static int plt_static_chain = ${DEFAULT_PLT_STATIC_CHAIN-0};
+
+/* Set if PLT call stubs need to be thread safe on power7+.  */
+static int plt_thread_safe = -1;
+
+/* Set if individual PLT call stubs should be aligned.  */
+static int plt_stub_align = 0;
 
 /* Whether to emit symbols for stubs.  */
 static int emit_stub_syms = -1;
@@ -379,7 +385,8 @@ ppc_add_stub_section (const char *stub_sec_name, asection *input_section)
   stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
                                                 stub_sec_name, flags);
   if (stub_sec == NULL
-      || !bfd_set_section_alignment (stub_file->the_bfd, stub_sec, 5))
+      || !bfd_set_section_alignment (stub_file->the_bfd, stub_sec,
+                                    plt_stub_align > 5 ? plt_stub_align : 5))
     goto err_ret;
 
   output_section = input_section->output_section;
@@ -388,7 +395,7 @@ ppc_add_stub_section (const char *stub_sec_name, asection *input_section)
 
   info.input_section = input_section;
   lang_list_init (&info.add);
-  lang_add_section (&info.add, stub_sec, os);
+  lang_add_section (&info.add, stub_sec, NULL, os);
 
   if (info.add.head == NULL)
     goto err_ret;
@@ -428,7 +435,7 @@ build_toc_list (lang_statement_union_type *statement)
     {
       asection *i = statement->input_section.section;
 
-      if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
+      if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
          && (i->flags & SEC_EXCLUDE) == 0
          && i->output_section == toc_section)
        {
@@ -446,7 +453,7 @@ build_section_lists (lang_statement_union_type *statement)
     {
       asection *i = statement->input_section.section;
 
-      if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
+      if (!((lang_input_statement_type *) i->owner->usrdata)->flags.just_syms
          && (i->flags & SEC_EXCLUDE) == 0
          && i->output_section != NULL
          && i->output_section->owner == link_info.output_bfd)
@@ -504,7 +511,9 @@ gld${EMULATION_NAME}_after_allocation (void)
            einfo ("%P: .init/.fini fragments use differing TOC pointers\n");
 
          /* Call into the BFD backend to do the real work.  */
-         if (!ppc64_elf_size_stubs (&link_info, group_size, plt_static_chain))
+         if (!ppc64_elf_size_stubs (&link_info, group_size,
+                                    plt_static_chain, plt_thread_safe,
+                                    plt_stub_align))
            einfo ("%X%P: can not size stub section: %E\n");
        }
     }
@@ -530,14 +539,6 @@ gld${EMULATION_NAME}_finish (void)
      descriptor in the .opd section.  */
   entry_section = ".opd";
 
-  if (link_info.relocatable)
-    {
-      asection *toc = bfd_get_section_by_name (link_info.output_bfd, ".toc");
-      if (toc != NULL
-         && bfd_section_size (link_info.output_bfd, toc) > 0x10000)
-       einfo ("%X%P: TOC section size exceeds 64k\n");
-    }
-
   if (stub_added)
     {
       char *msg = NULL;
@@ -657,7 +658,11 @@ PARSE_AND_LIST_PROLOGUE=${PARSE_AND_LIST_PROLOGUE}'
 #define OPTION_STUBGROUP_SIZE          321
 #define OPTION_PLT_STATIC_CHAIN                (OPTION_STUBGROUP_SIZE + 1)
 #define OPTION_NO_PLT_STATIC_CHAIN     (OPTION_PLT_STATIC_CHAIN + 1)
-#define OPTION_STUBSYMS                        (OPTION_NO_PLT_STATIC_CHAIN + 1)
+#define OPTION_PLT_THREAD_SAFE         (OPTION_NO_PLT_STATIC_CHAIN + 1)
+#define OPTION_NO_PLT_THREAD_SAFE      (OPTION_PLT_THREAD_SAFE + 1)
+#define OPTION_PLT_ALIGN               (OPTION_NO_PLT_THREAD_SAFE + 1)
+#define OPTION_NO_PLT_ALIGN            (OPTION_PLT_ALIGN + 1)
+#define OPTION_STUBSYMS                        (OPTION_NO_PLT_ALIGN + 1)
 #define OPTION_NO_STUBSYMS             (OPTION_STUBSYMS + 1)
 #define OPTION_DOTSYMS                 (OPTION_NO_STUBSYMS + 1)
 #define OPTION_NO_DOTSYMS              (OPTION_DOTSYMS + 1)
@@ -674,6 +679,10 @@ PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}'
   { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
   { "plt-static-chain", no_argument, NULL, OPTION_PLT_STATIC_CHAIN },
   { "no-plt-static-chain", no_argument, NULL, OPTION_NO_PLT_STATIC_CHAIN },
+  { "plt-thread-safe", no_argument, NULL, OPTION_PLT_THREAD_SAFE },
+  { "no-plt-thread-safe", no_argument, NULL, OPTION_NO_PLT_THREAD_SAFE },
+  { "plt-align", optional_argument, NULL, OPTION_PLT_ALIGN },
+  { "no-plt-align", no_argument, NULL, OPTION_NO_PLT_ALIGN },
   { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS },
   { "no-emit-stub-syms", no_argument, NULL, OPTION_NO_STUBSYMS },
   { "dotsyms", no_argument, NULL, OPTION_DOTSYMS },
@@ -699,10 +708,22 @@ PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}'
                                 choose suitable defaults.\n"
                   ));
   fprintf (file, _("\
-  --plt-static-chain          PLT call stubs should load r11.\n"
+  --plt-static-chain          PLT call stubs should load r11.${DEFAULT_PLT_STATIC_CHAIN- (default)}\n"
+                  ));
+  fprintf (file, _("\
+  --no-plt-static-chain       PLT call stubs should not load r11.${DEFAULT_PLT_STATIC_CHAIN+ (default)}\n"
+                  ));
+  fprintf (file, _("\
+  --plt-thread-safe           PLT call stubs with load-load barrier.\n"
                   ));
   fprintf (file, _("\
-  --no-plt-static-chain       PLT call stubs should not load r11. (default)\n"
+  --no-plt-thread-safe        PLT call stubs without barrier.\n"
+                  ));
+  fprintf (file, _("\
+  --plt-align [=<align>]      Align PLT call stubs to fit cache lines.\n"
+                  ));
+  fprintf (file, _("\
+  --no-plt-align              Dont'\''t align individual PLT call stubs.\n"
                   ));
   fprintf (file, _("\
   --emit-stub-syms            Label linker stubs with a symbol.\n"
@@ -761,6 +782,31 @@ PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}'
       plt_static_chain = 0;
       break;
 
+    case OPTION_PLT_THREAD_SAFE:
+      plt_thread_safe = 1;
+      break;
+
+    case OPTION_NO_PLT_THREAD_SAFE:
+      plt_thread_safe = 0;
+      break;
+
+    case OPTION_PLT_ALIGN:
+      if (optarg != NULL)
+       {
+         char *end;
+         unsigned long val = strtoul (optarg, &end, 0);
+         if (*end || val > 8)
+           einfo (_("%P%F: invalid --plt-align `%s'\''\n"), optarg);
+         plt_stub_align = val;
+       }
+      else
+       plt_stub_align = 5;
+      break;
+
+    case OPTION_NO_PLT_ALIGN:
+      plt_stub_align = 0;
+      break;
+
     case OPTION_STUBSYMS:
       emit_stub_syms = 1;
       break;