Fix duplicate output section statement lookup

Tie output section statements to their associated output section via
output section userdata.  This allows us to avoid hash lookups which
are slower and fail when multiple output sections have the same name.

	* ldlang.h (lang_output_section_get): Define.
	* ldlang.c (lang_output_section_get): Likewise.
	(init_os): Set the output_section userdata to the output
	section statement.
	* emultempl/hppaelf.em: Use lang_output_section_get instead of
	lang_output_section_find where applicable.
	* emultempl/aarch64elf.em: Likewise.
	* emultempl/aix.em: Likewise.
	* emultempl/armelf.em: Likewise.
	* emultempl/m68hc1xelf.em: Likewise.
	* emultempl/metagelf.em: Likewise.
	* emultempl/mipself.em: Likewise.
	* emultempl/ppc64elf.em: Likewise.
	* emultempl/spuelf.em: Likewise.

12 files changed, 43 insertions, 25 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index ee26f64..a022cba 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,21 @@
+2014-01-20  Guy Martin <gmsoft@tuxicoman.be>
+	    Alan Modra  <amodra@gmail.com>
+
+	* ldlang.h (lang_output_section_get): Define.
+	* ldlang.c (lang_output_section_get): Likewise.
+	(init_os): Set the output_section userdata to the output
+	section statement.
+	* emultempl/hppaelf.em: Use lang_output_section_get instead of
+	lang_output_section_find where applicable.
+	* emultempl/aarch64elf.em: Likewise.
+	* emultempl/aix.em: Likewise.
+	* emultempl/armelf.em: Likewise.
+	* emultempl/m68hc1xelf.em: Likewise.
+	* emultempl/metagelf.em: Likewise.
+	* emultempl/mipself.em: Likewise.
+	* emultempl/ppc64elf.em: Likewise.
+	* emultempl/spuelf.em: Likewise.
+
 2014-01-17  Alan Modra  <amodra@gmail.com>
 
 	* genscripts.sh (COMPILE_IN): Don't set if already set.
diff --git a/ld/emultempl/aarch64elf.em b/ld/emultempl/aarch64elf.em
index b3279bf..b631feb 100644
--- a/ld/emultempl/aarch64elf.em
+++ b/ld/emultempl/aarch64elf.em
@@ -159,7 +159,6 @@ elf${ELFSIZE}_aarch64_add_stub_section (const char *stub_sec_name,
   asection *stub_sec;
   flagword flags;
   asection *output_section;
-  const char *secname;
   lang_output_section_statement_type *os;
   struct hook_stub_info info;
 
@@ -173,8 +172,7 @@ elf${ELFSIZE}_aarch64_add_stub_section (const char *stub_sec_name,
   bfd_set_section_alignment (stub_file->the_bfd, stub_sec, 3);
 
   output_section = input_section->output_section;
-  secname = bfd_get_section_name (output_section->owner, output_section);
-  os = lang_output_section_find (secname);
+  os = lang_output_section_get (output_section);
 
   info.input_section = input_section;
   lang_list_init (&info.add);
diff --git a/ld/emultempl/aix.em b/ld/emultempl/aix.em
index 084bb66..d080133 100644
--- a/ld/emultempl/aix.em
+++ b/ld/emultempl/aix.em
@@ -854,7 +854,7 @@ gld${EMULATION_NAME}_before_allocation (void)
       /* Remove this section from the list of the output section.
 	 This assumes we know what the script looks like.  */
       is = NULL;
-      os = lang_output_section_find (sec->output_section->name);
+      os = lang_output_section_get (sec->output_section);
       if (os == NULL)
 	einfo ("%P%F: can't find output section %s\n",
 	       sec->output_section->name);
diff --git a/ld/emultempl/armelf.em b/ld/emultempl/armelf.em
index eee6af1..85e924f 100644
--- a/ld/emultempl/armelf.em
+++ b/ld/emultempl/armelf.em
@@ -189,7 +189,6 @@ elf32_arm_add_stub_section (const char * stub_sec_name,
   asection *stub_sec;
   flagword flags;
   asection *output_section;
-  const char *secname;
   lang_output_section_statement_type *os;
   struct hook_stub_info info;
 
@@ -203,8 +202,7 @@ elf32_arm_add_stub_section (const char * stub_sec_name,
   bfd_set_section_alignment (stub_file->the_bfd, stub_sec, alignment_power);
 
   output_section = input_section->output_section;
-  secname = bfd_get_section_name (output_section->owner, output_section);
-  os = lang_output_section_find (secname);
+  os = lang_output_section_get (output_section);
 
   info.input_section = input_section;
   lang_list_init (&info.add);
diff --git a/ld/emultempl/hppaelf.em b/ld/emultempl/hppaelf.em
index 65c1ea5..1b7e384 100644
--- a/ld/emultempl/hppaelf.em
+++ b/ld/emultempl/hppaelf.em
@@ -178,7 +178,6 @@ hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section)
   asection *stub_sec;
   flagword flags;
   asection *output_section;
-  const char *secname;
   lang_output_section_statement_type *os;
   struct hook_stub_info info;
 
@@ -190,8 +189,7 @@ hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section)
     goto err_ret;
 
   output_section = input_section->output_section;
-  secname = bfd_get_section_name (output_section->owner, output_section);
-  os = lang_output_section_find (secname);
+  os = lang_output_section_get (output_section);
 
   info.input_section = input_section;
   lang_list_init (&info.add);
diff --git a/ld/emultempl/m68hc1xelf.em b/ld/emultempl/m68hc1xelf.em
index 594b193..4e1360f 100644
--- a/ld/emultempl/m68hc1xelf.em
+++ b/ld/emultempl/m68hc1xelf.em
@@ -250,7 +250,6 @@ m68hc11elf_add_stub_section (const char *stub_sec_name,
   asection *stub_sec;
   flagword flags;
   asection *output_section;
-  const char *secname;
   lang_output_section_statement_type *os;
   struct hook_stub_info info;
 
@@ -262,8 +261,7 @@ m68hc11elf_add_stub_section (const char *stub_sec_name,
     goto err_ret;
 
   output_section = tramp_section->output_section;
-  secname = bfd_get_section_name (output_section->owner, output_section);
-  os = lang_output_section_find (secname);
+  os = lang_output_section_get (output_section);
 
   /* Try to put the new section at the same place as an existing
      .tramp section.  Such .tramp section exists in most cases and
diff --git a/ld/emultempl/metagelf.em b/ld/emultempl/metagelf.em
index 21e3e94..7760f81 100644
--- a/ld/emultempl/metagelf.em
+++ b/ld/emultempl/metagelf.em
@@ -154,7 +154,6 @@ metagelf_add_stub_section (const char *stub_sec_name, asection *input_section)
   asection *stub_sec;
   flagword flags;
   asection *output_section;
-  const char *secname;
   lang_output_section_statement_type *os;
   struct hook_stub_info info;
 
@@ -166,8 +165,7 @@ metagelf_add_stub_section (const char *stub_sec_name, asection *input_section)
     goto err_ret;
 
   output_section = input_section->output_section;
-  secname = bfd_get_section_name (output_section->owner, output_section);
-  os = lang_output_section_find (secname);
+  os = lang_output_section_get (output_section);
 
   info.input_section = input_section;
   lang_list_init (&info.add);
diff --git a/ld/emultempl/mipself.em b/ld/emultempl/mipself.em
index 3c6ec9f..02043b7 100644
--- a/ld/emultempl/mipself.em
+++ b/ld/emultempl/mipself.em
@@ -136,7 +136,6 @@ mips_add_stub_section (const char *stub_sec_name, asection *input_section,
 {
   asection *stub_sec;
   flagword flags;
-  const char *secname;
   lang_output_section_statement_type *os;
   struct hook_stub_info info;
 
@@ -176,9 +175,7 @@ mips_add_stub_section (const char *stub_sec_name, asection *input_section,
   if (!bfd_set_section_flags (stub_bfd, stub_sec, flags))
     goto err_ret;
 
-  /* Create an output section statement.  */
-  secname = bfd_get_section_name (output_section->owner, output_section);
-  os = lang_output_section_find (secname);
+  os = lang_output_section_get (output_section);
 
   /* Initialize a statement list that contains only the new statement.  */
   lang_list_init (&info.add);
diff --git a/ld/emultempl/ppc64elf.em b/ld/emultempl/ppc64elf.em
index f2085d7..c126297 100644
--- a/ld/emultempl/ppc64elf.em
+++ b/ld/emultempl/ppc64elf.em
@@ -378,7 +378,6 @@ ppc_add_stub_section (const char *stub_sec_name, asection *input_section)
   asection *stub_sec;
   flagword flags;
   asection *output_section;
-  const char *secname;
   lang_output_section_statement_type *os;
   struct hook_stub_info info;
 
@@ -392,8 +391,7 @@ ppc_add_stub_section (const char *stub_sec_name, asection *input_section)
     goto err_ret;
 
   output_section = input_section->output_section;
-  secname = bfd_get_section_name (output_section->owner, output_section);
-  os = lang_output_section_find (secname);
+  os = lang_output_section_get (output_section);
 
   info.input_section = input_section;
   lang_list_init (&info.add);
diff --git a/ld/emultempl/spuelf.em b/ld/emultempl/spuelf.em
index e14fa26..8feb8bf 100644
--- a/ld/emultempl/spuelf.em
+++ b/ld/emultempl/spuelf.em
@@ -138,8 +138,9 @@ spu_place_special_section (asection *s, asection *o, const char *output_name)
   lang_output_section_statement_type *os;
 
   if (o != NULL)
-    output_name = o->name;
-  os = lang_output_section_find (output_name);
+    os = lang_output_section_get (o);
+  else
+    os = lang_output_section_find (output_name);
   if (os == NULL)
     {
       os = gld${EMULATION_NAME}_place_orphan (s, output_name, 0);
diff --git a/ld/ldlang.c b/ld/ldlang.c
index 2a6c4c5..f6d713c 100644
--- a/ld/ldlang.c
+++ b/ld/ldlang.c
@@ -1376,6 +1376,14 @@ lang_memory_default (asection * section)
   return lang_memory_region_lookup (DEFAULT_MEMORY_REGION, FALSE);
 }
 
+/* Get the output section statement directly from the userdata.  */
+
+lang_output_section_statement_type *
+lang_output_section_get (const asection *output_section)
+{
+  return get_userdata (output_section);
+}
+
 /* Find or create an output_section_statement with the given NAME.
    If CONSTRAINT is non-zero match one with that constraint, otherwise
    match any non-negative constraint.  If CREATE, always make a
@@ -2104,6 +2112,10 @@ init_os (lang_output_section_statement_type *s, flagword flags)
   s->bfd_section->output_section = s->bfd_section;
   s->bfd_section->output_offset = 0;
 
+  /* Set the userdata of the output section to the output section
+     statement to avoid lookup.  */
+  get_userdata (s->bfd_section) = s;
+
   /* If there is a base address, make sure that any sections it might
      mention are initialized.  */
   if (s->addr_tree != NULL)
diff --git a/ld/ldlang.h b/ld/ldlang.h
index 6eb75dc..e91153c 100644
--- a/ld/ldlang.h
+++ b/ld/ldlang.h
@@ -584,6 +584,8 @@ extern lang_input_statement_type *lang_add_input_file
   (const char *, lang_input_file_enum_type, const char *);
 extern void lang_add_keepsyms_file
   (const char *);
+extern lang_output_section_statement_type *lang_output_section_get
+  (const asection *);
 extern lang_output_section_statement_type *lang_output_section_statement_lookup
   (const char *, int, bfd_boolean);
 extern lang_output_section_statement_type *next_matching_output_section_statement