From: Alan Modra <amodra@gmail.com>
Date: Sat, 24 Dec 2005 07:48:30 +0000 (+0000)
Subject: 	* ldlang.h (lang_output_section_statement_type): Add prev.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=218868ba41c7305c13c7b4c7e781cabeb11dce62;p=binutils-gdb.git

	* ldlang.h (lang_output_section_statement_type): Add prev.
	* ldlang.c (output_statement_newfunc): Set os.prev.
	(lang_insert_orphan): Likewise.
	(output_prev_sec_find): Use os.prev.
---

diff --git a/ld/ChangeLog b/ld/ChangeLog
index c0c61d8e3de..dea1f295296 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,10 @@
+2005-12-24  Alan Modra  <amodra@bigpond.net.au>
+
+	* ldlang.h (lang_output_section_statement_type): Add prev.
+	* ldlang.c (output_statement_newfunc): Set os.prev.
+	(lang_insert_orphan): Likewise.
+	(output_prev_sec_find): Use os.prev.
+
 2005-12-22  Santosh Raktawan <santoshr2@kpitcummins.com>
 
 	* ld/emulparms/h8300helf.sh (TINY_READONLY_SECTION,
diff --git a/ld/ldlang.c b/ld/ldlang.c
index 8ef48d13b9f..f51f68ef4b0 100644
--- a/ld/ldlang.c
+++ b/ld/ldlang.c
@@ -912,6 +912,14 @@ output_statement_newfunc (struct bfd_hash_entry *entry,
 			 (lang_statement_union_type *) &ret->os,
 			 &ret->os.header.next);
 
+  /* For every output section statement added to the list, except the
+     first one, lang_output_section_statement.tail points to the "next"
+     field of the last element of the list.  */
+  if (lang_output_section_statement.head != NULL)
+    ret->os.prev = (lang_output_section_statement_type *)
+      ((char *) lang_output_section_statement.tail
+       - offsetof (lang_output_section_statement_type, next));
+
   /* GCC's strict aliasing rules prevent us from just casting the
      address, so we store the pointer in a variable and cast that
      instead.  */
@@ -1290,20 +1298,15 @@ lang_output_section_find_by_flags (const asection *sec,
 static asection *
 output_prev_sec_find (lang_output_section_statement_type *os)
 {
-  asection *s = (asection *) NULL;
   lang_output_section_statement_type *lookup;
 
-  for (lookup = &lang_output_section_statement.head->output_section_statement;
-       lookup != NULL;
-       lookup = lookup->next)
+  for (lookup = os->prev; lookup != NULL; lookup = lookup->prev)
     {
       if (lookup->constraint == -1)
 	continue;
-      if (lookup == os)
-	return s;
 
       if (lookup->bfd_section != NULL && lookup->bfd_section->owner != NULL)
-	s = lookup->bfd_section;
+	return lookup->bfd_section;
     }
 
   return NULL;
@@ -1544,7 +1547,12 @@ lang_insert_orphan (asection *s,
 	  /* Do the same for the list of output section statements.  */
 	  newly_added_os = *os_tail;
 	  *os_tail = NULL;
+	  newly_added_os->prev = (lang_output_section_statement_type *)
+	    ((char *) place->os_tail
+	     - offsetof (lang_output_section_statement_type, next));
 	  newly_added_os->next = *place->os_tail;
+	  if (newly_added_os->next != NULL)
+	    newly_added_os->next->prev = newly_added_os;
 	  *place->os_tail = newly_added_os;
 	  place->os_tail = &newly_added_os->next;
 
diff --git a/ld/ldlang.h b/ld/ldlang.h
index 381bb0484cb..cf5b01ff3d0 100644
--- a/ld/ldlang.h
+++ b/ld/ldlang.h
@@ -130,6 +130,7 @@ typedef struct lang_output_section_statement_struct
   lang_statement_header_type header;
   lang_statement_list_type children;
   struct lang_output_section_statement_struct *next;
+  struct lang_output_section_statement_struct *prev;
   const char *name;
   asection *bfd_section;
   lang_memory_region_type *region;