2006-05-24 Paul Brook <paul@codesourcery.com>

bfd/
	* elf-bfd.h (elf_backend_data): Add elf_backend_output_arch_local_syms
	* elf32-arm.c (output_arch_syminfo): Define.
	(elf32_arm_ouput_plt_map_sym, elf32_arm_output_plt_map,
	elf32_arm_output_arch_local_syms): New functions.
	(elf_backend_output_arch_local_syms): Define.
	* elflink.c (bfd_elf_final_link): Call
	elf_backend_output_arch_local_syms.
	* elfxx-target.h (elf_backend_output_arch_local_syms): Provide default
	definition.
	(elfNN_bed): Add elf_backend_output_arch_local_syms.
ld/testsuite/
	* ld-arm/arm-app-abs32.d: Update expected output.
	* ld-arm/arm-app.d: Ditto.
	* ld-arm/arm-lib-plt32.d: Ditto.
	* ld-arm/arm-lib.d: Ditto.
	* ld-arm/mixed-app-v5.d: Ditto.
	* ld-arm/mixed-app.d: Ditto.
	* ld-arm/mixed-lib.d: Ditto.

5 files changed, 209 insertions, 1 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 51f5448..79b6321 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,5 +1,18 @@
 2006-05-24  Paul Brook  <paul@codesourcery.com>
 
+	* elf-bfd.h (elf_backend_data): Add elf_backend_output_arch_local_syms
+	* elf32-arm.c (output_arch_syminfo): Define.
+	(elf32_arm_ouput_plt_map_sym, elf32_arm_output_plt_map,
+	elf32_arm_output_arch_local_syms): New functions.
+	(elf_backend_output_arch_local_syms): Define.
+	* elflink.c (bfd_elf_final_link): Call
+	elf_backend_output_arch_local_syms.
+	* elfxx-target.h (elf_backend_output_arch_local_syms): Provide default
+	definition.
+	(elfNN_bed): Add elf_backend_output_arch_local_syms.
+
+2006-05-24  Paul Brook  <paul@codesourcery.com>
+
 	* elf32-arm.c (put_arm_insn, put_thumb_insn): New functions.
 	(elf32_thumb_to_arm_stub, elf32_arm_to_thumb_stub,
 	elf32_arm_finish_dynamic_symbol): Use them.
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h
index 3fba1c2..3a32fc4 100644
--- a/bfd/elf-bfd.h
+++ b/bfd/elf-bfd.h
@@ -865,8 +865,16 @@ struct elf_backend_data
 
   /* This function, if defined, is called after all local symbols and
      global symbols converted to locals are emitted into the symtab
-     section.  It allows the backend to emit special global symbols
+     section.  It allows the backend to emit special local symbols
      not handled in the hash table.  */
+  bfd_boolean (*elf_backend_output_arch_local_syms)
+    (bfd *, struct bfd_link_info *, void *,
+     bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
+		      struct elf_link_hash_entry *));
+
+  /* This function, if defined, is called after all symbols are emitted
+     into the symtab section.  It allows the backend to emit special
+     global symbols not handled in the hash table.  */
   bfd_boolean (*elf_backend_output_arch_syms)
     (bfd *, struct bfd_link_info *, void *,
      bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index 1288ac2..e2beac7 100644
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -7950,6 +7950,174 @@ elf32_arm_output_symbol_hook (struct bfd_link_info *info,
   return TRUE;
 }
 
+typedef struct
+{
+  void *finfo;
+  struct bfd_link_info *info;
+  int plt_shndx;
+  bfd_vma plt_offset;
+  bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *,
+		       asection *, struct elf_link_hash_entry *);
+} output_arch_syminfo;
+
+enum map_symbol_type
+{
+  ARM_MAP_ARM,
+  ARM_MAP_THUMB,
+  ARM_MAP_DATA
+};
+
+
+/* Output a single PLT mapping symbol.  */
+
+static bfd_boolean
+elf32_arm_ouput_plt_map_sym (output_arch_syminfo *osi,
+			     enum map_symbol_type type,
+			     bfd_vma offset)
+{
+  static const char *names[3] = {"$a", "$t", "$d"};
+  struct elf32_arm_link_hash_table *htab;
+  Elf_Internal_Sym sym;
+
+  htab = elf32_arm_hash_table (osi->info);
+  sym.st_value = osi->plt_offset + offset;
+  sym.st_size = 0;
+  sym.st_other = 0;
+  sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
+  sym.st_shndx = osi->plt_shndx;
+  if (!osi->func (osi->finfo, names[type], &sym, htab->splt, NULL))
+    return FALSE;
+  return TRUE;
+}
+
+
+/* Output mapping symbols for PLT entries associated with H.  */
+
+static bfd_boolean
+elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
+{
+  output_arch_syminfo *osi = (output_arch_syminfo *) inf;
+  struct elf32_arm_link_hash_table *htab;
+  struct elf32_arm_link_hash_entry *eh;
+  bfd_vma addr;
+
+  htab = elf32_arm_hash_table (osi->info);
+
+  if (h->root.type == bfd_link_hash_indirect)
+    return TRUE;
+
+  if (h->root.type == bfd_link_hash_warning)
+    /* When warning symbols are created, they **replace** the "real"
+       entry in the hash table, thus we never get to see the real
+       symbol in a hash traversal.  So look at it now.  */
+    h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+  if (h->plt.offset == (bfd_vma) -1)
+    return TRUE;
+
+  eh = (struct elf32_arm_link_hash_entry *) h;
+  addr = h->plt.offset;
+  if (htab->symbian_p)
+    {
+      if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
+	return FALSE;
+      if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 4))
+	return FALSE;
+    }
+  else if (htab->vxworks_p)
+    {
+      if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
+	return FALSE;
+      if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 8))
+	return FALSE;
+      if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr + 12))
+	return FALSE;
+      if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 20))
+	return FALSE;
+    }
+  else
+    {
+      bfd_boolean thumb_stub;
+
+      thumb_stub = eh->plt_thumb_refcount > 0 && !htab->use_blx;
+      if (thumb_stub)
+	{
+	  if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_THUMB, addr - 4))
+	    return FALSE;
+	}
+#ifdef FOUR_WORD_PLT
+      if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
+	return FALSE;
+      if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 12))
+	return FALSE;
+#else
+      /* A three-word PLT with no Thumb thunk contains only Arm code, 
+	 so only need to output a mapping symbol for the first PLT entry and
+	 entries with thumb thunks.  */
+      if (thumb_stub || addr == 20)
+	{
+	  if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
+	    return FALSE;
+	}
+#endif
+    }
+
+  return TRUE;
+}
+
+
+/* Output mapping symbols for the PLT.  */
+
+static bfd_boolean
+elf32_arm_output_arch_local_syms (bfd *output_bfd,
+    struct bfd_link_info *info,
+    void *finfo, bfd_boolean (*func) (void *, const char *,
+				    Elf_Internal_Sym *,
+				    asection *,
+				    struct elf_link_hash_entry *))
+{
+  output_arch_syminfo osi;
+  struct elf32_arm_link_hash_table *htab;
+
+  htab = elf32_arm_hash_table (info);
+  if (!htab->splt || htab->splt->size == 0)
+    return TRUE;
+
+  check_use_blx(htab);
+  osi.finfo = finfo;
+  osi.info = info;
+  osi.func = func;
+  osi.plt_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
+      htab->splt->output_section);
+  osi.plt_offset = htab->splt->output_section->vma;
+
+  /* Output mapping symbols for the plt header.  SymbianOS does not have a
+     plt header.  */
+  if (htab->vxworks_p)
+    {
+      /* VxWorks shared libraries have no PLT header.  */
+      if (!info->shared)
+	{
+	  if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
+	    return FALSE;
+	  if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 12))
+	    return FALSE;
+	}
+    }
+  else if (!htab->symbian_p)
+    {
+      if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
+	return FALSE;
+#ifndef FOUR_WORD_PLT
+      if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 16))
+	return FALSE;
+#endif
+    }
+
+  elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
+  return TRUE;
+}
+
 /* Allocate target specific section data.  */
 
 static bfd_boolean
@@ -8280,6 +8448,8 @@ const struct elf_size_info elf32_arm_size_info = {
 #define elf_backend_modify_segment_map		elf32_arm_modify_segment_map
 #define elf_backend_additional_program_headers \
   elf32_arm_additional_program_headers
+#define elf_backend_output_arch_local_syms \
+  elf32_arm_output_arch_local_syms
 
 #define elf_backend_can_refcount    1
 #define elf_backend_can_gc_sections 1
diff --git a/bfd/elflink.c b/bfd/elflink.c
index ff401f2..df2b7e9 100644
--- a/bfd/elflink.c
+++ b/bfd/elflink.c
@@ -8296,6 +8296,19 @@ bfd_elf_final_link (bfd *abfd, struct bfd_link_info *info)
   if (eoinfo.failed)
     return FALSE;
 
+  /* If backend needs to output some local symbols not present in the hash
+     table, do it now.  */
+  if (bed->elf_backend_output_arch_local_syms)
+    {
+      typedef bfd_boolean (*out_sym_func)
+	(void *, const char *, Elf_Internal_Sym *, asection *,
+	 struct elf_link_hash_entry *);
+
+      if (! ((*bed->elf_backend_output_arch_local_syms)
+	     (abfd, info, &finfo, (out_sym_func) elf_link_output_sym)))
+	return FALSE;
+    }
+
   /* That wrote out all the local symbols.  Finish up the symbol table
      with the global symbols. Even if we want to strip everything we
      can, we still need to deal with those global symbols that got
diff --git a/bfd/elfxx-target.h b/bfd/elfxx-target.h
index 14a693a..5a5ca34 100644
--- a/bfd/elfxx-target.h
+++ b/bfd/elfxx-target.h
@@ -413,6 +413,9 @@
 #ifndef elf_backend_print_symbol_all
 #define elf_backend_print_symbol_all		NULL
 #endif
+#ifndef elf_backend_output_arch_local_syms
+#define elf_backend_output_arch_local_syms	NULL
+#endif
 #ifndef elf_backend_output_arch_syms
 #define elf_backend_output_arch_syms		NULL
 #endif
@@ -600,6 +603,7 @@ static const struct elf_backend_data elfNN_bed =
   elf_backend_gc_sweep_hook,
   elf_backend_post_process_headers,
   elf_backend_print_symbol_all,
+  elf_backend_output_arch_local_syms,
   elf_backend_output_arch_syms,
   elf_backend_copy_indirect_symbol,
   elf_backend_hide_symbol,