From 2b1d386f90830a33279cf6d2ff05e3e2c710f8b7 Mon Sep 17 00:00:00 2001
From: Nick Clifton <nickc@redhat.com>
Date: Thu, 22 Aug 2002 19:11:51 +0000
Subject: Set the last bit of DT_INIT and DT_FINI depending on the type of the
 function.

---
 ld/emultempl/armelf.em | 125 ++++++++++++++++++++++++++++++++-----------------
 1 file changed, 82 insertions(+), 43 deletions(-)

(limited to 'ld/emultempl')

diff --git a/ld/emultempl/armelf.em b/ld/emultempl/armelf.em
index 0e65c04ca6..d2bfb4aba4 100644
--- a/ld/emultempl/armelf.em
+++ b/ld/emultempl/armelf.em
@@ -24,9 +24,18 @@
 #
 cat >>e${EMULATION_NAME}.c <<EOF
 
-static int no_pipeline_knowledge = 0;
-static char *thumb_entry_symbol = NULL;
-static bfd *bfd_for_interwork;
+#include "elf-bfd.h"
+#include "elf/arm.h"
+
+static int    no_pipeline_knowledge = 0;
+static char * thumb_entry_symbol = NULL;
+static bfd *  bfd_for_interwork;
+
+static void  arm_elf_after_open                PARAMS ((void));
+static void  arm_elf_set_bfd_for_interworking  PARAMS ((lang_statement_union_type *));
+static void  arm_elf_before_allocation         PARAMS ((void));
+static void  arm_elf_stringify_thumb_address   PARAMS ((struct bfd_link_hash_entry *, char *));
+static void  arm_elf_finish                    PARAMS ((void));
 
 
 static void
@@ -39,8 +48,6 @@ gld${EMULATION_NAME}_before_parse ()
   config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo true ; else echo false ; fi`;
 }
 
-static void arm_elf_after_open PARAMS ((void));
-
 static void
 arm_elf_after_open ()
 {
@@ -65,18 +72,15 @@ arm_elf_after_open ()
   gld${EMULATION_NAME}_after_open ();
 }
 
-static void arm_elf_set_bfd_for_interworking
-  PARAMS ((lang_statement_union_type *));
-
 static void
 arm_elf_set_bfd_for_interworking (statement)
-     lang_statement_union_type *statement;
+     lang_statement_union_type * statement;
 {
   if (statement->header.type == lang_input_section_enum
       && statement->input_section.ifile->just_syms_flag == false)
     {
-      asection *i = statement->input_section.section;
-      asection *output_section = i->output_section;
+      asection * i = statement->input_section.section;
+      asection * output_section = i->output_section;
 
       ASSERT (output_section->owner == output_bfd);
 
@@ -90,12 +94,10 @@ arm_elf_set_bfd_for_interworking (statement)
     }
 }
 
-static void arm_elf_before_allocation PARAMS ((void));
-
 static void
 arm_elf_before_allocation ()
 {
-  bfd *tem;
+  bfd * tem;
 
   /* Call the standard elf routine.  */
   gld${EMULATION_NAME}_before_allocation ();
@@ -134,7 +136,27 @@ arm_elf_before_allocation ()
   bfd_elf32_arm_allocate_interworking_sections (& link_info);
 }
 
-static void arm_elf_finish PARAMS ((void));
+void
+arm_elf_stringify_thumb_address (h, buffer)
+     struct bfd_link_hash_entry * h;
+     char * buffer;
+{
+  bfd_vma val;
+      
+  /* Get the address of the symbol.  */
+  val = (h->u.def.value
+	 + bfd_get_section_vma (output_bfd,
+				h->u.def.section->output_section)
+	 + h->u.def.section->output_offset);
+  /* This is a thumb address, so the bottom bit of its address must be set.  */
+  val |= 1;
+
+  /* Now convert this value into a string.  */
+  buffer[0] = '0';
+  buffer[1] = 'x';
+
+  sprintf_vma (buffer + 2, val);
+}
 
 static void
 arm_elf_finish ()
@@ -144,44 +166,61 @@ arm_elf_finish ()
   /* Call the elf32.em routine.  */
   gld${EMULATION_NAME}_finish ();
 
-  if (thumb_entry_symbol == NULL)
-    return;
-  
-  h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
-			    false, false, true);
+  if (thumb_entry_symbol != NULL)
+    {
+      static char buffer[32];
+
+      h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
+				false, false, true);
+
+      if (h != (struct bfd_link_hash_entry *) NULL
+	  && (h->type == bfd_link_hash_defined
+	      || h->type == bfd_link_hash_defweak)
+	  && h->u.def.section->output_section != NULL)
+	{
+	  if (entry_symbol.name != NULL && entry_from_cmdline)
+	    einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
+		   thumb_entry_symbol, entry_symbol.name);
+	  
+	  arm_elf_stringify_thumb_address (h, buffer);
+	  entry_symbol.name = buffer;
+	}
+      else
+	einfo (_("%P: warning: cannot find thumb start symbol %s\n"),
+	       thumb_entry_symbol);
+    }
+
+  /* If init is a Thumb function set the LSB.  */
+  h = bfd_link_hash_lookup (link_info.hash, link_info.init_function, false,
+			    false, true);
 
   if (h != (struct bfd_link_hash_entry *) NULL
       && (h->type == bfd_link_hash_defined
 	  || h->type == bfd_link_hash_defweak)
+      && ELF_ST_TYPE (((struct elf_link_hash_entry *)h)->type) == STT_ARM_TFUNC
       && h->u.def.section->output_section != NULL)
     {
       static char buffer[32];
-      bfd_vma val;
-      
-      /* Special procesing is required for a Thumb entry symbol.  The
-	 bottom bit of its address must be set.  */
-      val = (h->u.def.value
-	     + bfd_get_section_vma (output_bfd,
-				    h->u.def.section->output_section)
-	     + h->u.def.section->output_offset);
-      
-      val |= 1;
 
-      /* Now convert this value into a string and store it in entry_symbol
-         where the lang_finish() function will pick it up.  */
-      buffer[0] = '0';
-      buffer[1] = 'x';
-      
-      sprintf_vma (buffer + 2, val);
+      arm_elf_stringify_thumb_address (h, buffer);
+      link_info.init_function = buffer;
+    }
+
+  /* If fini is a Thumb function set the LSB.  */
+  h = bfd_link_hash_lookup (link_info.hash, link_info.fini_function, false,
+			    false, true);
+
+  if (h != (struct bfd_link_hash_entry *) NULL
+      && (h->type == bfd_link_hash_defined
+	  || h->type == bfd_link_hash_defweak)
+      && ELF_ST_TYPE (((struct elf_link_hash_entry *)h)->type) == STT_ARM_TFUNC
+      && h->u.def.section->output_section != NULL)
+    {
+      static char buffer[32];
 
-      if (entry_symbol.name != NULL && entry_from_cmdline)
-	einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
-	       thumb_entry_symbol, entry_symbol.name);
-      entry_symbol.name = buffer;
+      arm_elf_stringify_thumb_address (h, buffer);
+      link_info.fini_function = buffer;
     }
-  else
-    einfo (_("%P: warning: connot find thumb start symbol %s\n"),
-	   thumb_entry_symbol);
 }
 
 EOF
-- 
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