From 18cd5bce47dc4a33dd1d8e3036b99d2fa7e3234f Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Thu, 14 Aug 2014 13:49:31 +0930
Subject: Linker part of PR16563 fix

Presents .eh_frame input sections to the optimisation machinery in
elf-eh-frame.c in the order they are given by the linker script.

	PR 16563
bfd/
	* elflink.c (bfd_elf_discard_info): Process .eh_frame and .stab
	in the order they are mapped to output sections.
ld/
	* ldlang.c (map_head_is_link_order): Rename from
	stripped_excluded_sections.
	(lang_clear_os_map): New function, extracted from..
	(strip_excluded_output_sections): ..here.
	* ldlang.h (lang_clear_os_map): Declare.
	* ldwrite.c (ldwrite): Call lang_clear_os_map.
	* emultempl/sh64elf.em (sh64_elf_${EMULATION_NAME}_after_allocation):
	Likewise.
---
 ld/ldlang.c | 42 +++++++++++++++++++++++++++++++++++-------
 1 file changed, 35 insertions(+), 7 deletions(-)

(limited to 'ld/ldlang.c')

diff --git a/ld/ldlang.c b/ld/ldlang.c
index 419caa1..899f710 100644
--- a/ld/ldlang.c
+++ b/ld/ldlang.c
@@ -57,7 +57,7 @@ static struct obstack map_obstack;
 #define obstack_chunk_free free
 static const char *entry_symbol_default = "start";
 static bfd_boolean placed_commons = FALSE;
-static bfd_boolean stripped_excluded_sections = FALSE;
+static bfd_boolean map_head_is_link_order = FALSE;
 static lang_output_section_statement_type *default_common_section;
 static bfd_boolean map_option_f;
 static bfd_vma print_dot;
@@ -2412,7 +2412,7 @@ lang_add_section (lang_statement_list_type *ptr,
   section->output_section = output->bfd_section;
 
   if (!link_info.relocatable
-      && !stripped_excluded_sections)
+      && !map_head_is_link_order)
     {
       asection *s = output->bfd_section->map_tail.s;
       output->bfd_section->map_tail.s = section;
@@ -3912,10 +3912,6 @@ strip_excluded_output_sections (void)
 	      }
 	}
 
-      /* TODO: Don't just junk map_head.s, turn them into link_orders.  */
-      output_section->map_head.link_order = NULL;
-      output_section->map_tail.link_order = NULL;
-
       if (exclude)
 	{
 	  /* We don't set bfd_section to NULL since bfd_section of the
@@ -3927,10 +3923,42 @@ strip_excluded_output_sections (void)
 	  link_info.output_bfd->section_count--;
 	}
     }
+}
+
+/* Called from ldwrite to clear out asection.map_head and
+   asection.map_tail for use as link_orders in ldwrite.
+   FIXME: Except for sh64elf.em which starts creating link_orders in
+   its after_allocation routine so needs to call it early.  */
+
+void
+lang_clear_os_map (void)
+{
+  lang_output_section_statement_type *os;
+
+  if (map_head_is_link_order)
+    return;
+
+  for (os = &lang_output_section_statement.head->output_section_statement;
+       os != NULL;
+       os = os->next)
+    {
+      asection *output_section;
+
+      if (os->constraint < 0)
+	continue;
+
+      output_section = os->bfd_section;
+      if (output_section == NULL)
+	continue;
+
+      /* TODO: Don't just junk map_head.s, turn them into link_orders.  */
+      output_section->map_head.link_order = NULL;
+      output_section->map_tail.link_order = NULL;
+    }
 
   /* Stop future calls to lang_add_section from messing with map_head
      and map_tail link_order fields.  */
-  stripped_excluded_sections = TRUE;
+  map_head_is_link_order = TRUE;
 }
 
 static void
-- 
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