From 2889e75bfb63b5638dffb3bf9ae598e85af86af9 Mon Sep 17 00:00:00 2001
From: Nick Clifton <nickc@redhat.com>
Date: Wed, 21 Feb 2007 16:43:50 +0000
Subject: Take into account MEMORY regions when creating a segment map.

---
 ld/ChangeLog |  7 +++++++
 ld/ldlang.c  | 36 ++++++++++++++++++++++++++++++++++++
 ld/ldlang.h  |  4 ++++
 ld/ldmain.c  |  3 ++-
 4 files changed, 49 insertions(+), 1 deletion(-)

(limited to 'ld')

diff --git a/ld/ChangeLog b/ld/ChangeLog
index cbe0544..7c6506b 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,10 @@
+2007-02-21  Nick Clifton  <nickc@redhat.com>
+
+	* ldlang.c (ldlang_override_segment_assignment): New function.
+	* ldlang.h (ldlang_override_segment_assignment): Prototype.
+	* ldmain.c (link_callbacks): Add
+	ldlang_override_segment_assignment.
+
 2007-02-20  Alan Modra  <amodra@bigpond.net.au>
 
 	* ldexp.c (fold_name <LOADADDR>): Ensure result is always absolute.
diff --git a/ld/ldlang.c b/ld/ldlang.c
index 8a69c70..fa597f3 100644
--- a/ld/ldlang.c
+++ b/ld/ldlang.c
@@ -4704,6 +4704,42 @@ lang_size_sections_1
   return dot;
 }
 
+/* Callback routine that is used in _bfd_elf_map_sections_to_segments.  */
+
+bfd_boolean
+ldlang_override_segment_assignment (struct bfd_link_info * info ATTRIBUTE_UNUSED,
+				    bfd * abfd ATTRIBUTE_UNUSED,
+				    asection * current_section,
+				    asection * previous_section,
+				    bfd_boolean new_segment)
+{
+  lang_output_section_statement_type * cur;
+  lang_output_section_statement_type * prev;
+  
+  if (new_segment)
+    return TRUE;
+
+  /* Paranoia checks.  */
+  if (current_section == NULL || previous_section == NULL)
+    return new_segment;
+
+  /* Find the memory regions associated with the two sections.
+     We call lang_output_section_find() here rather than scanning the list
+     of output sections looking for a matching section pointer because if
+     we have a large number of sections a hash lookup is faster.  */
+  cur  = lang_output_section_find (current_section->name);
+  prev = lang_output_section_find (previous_section->name);
+
+  if (cur == NULL || prev == NULL)
+    return new_segment;
+
+  /* If the regions are different then force the sections to live in
+     different segments.  See the email thread starting here for the
+     reasons why this is necessary:
+     http://sourceware.org/ml/binutils/2007-02/msg00216.html  */
+  return cur->region != prev->region;
+}
+
 void
 one_lang_size_sections_pass (bfd_boolean *relax, bfd_boolean check_regions)
 {
diff --git a/ld/ldlang.h b/ld/ldlang.h
index 0074159..d34ea68 100644
--- a/ld/ldlang.h
+++ b/ld/ldlang.h
@@ -623,4 +623,8 @@ extern void add_excluded_libs (const char *);
 extern bfd_boolean load_symbols
   (lang_input_statement_type *, lang_statement_list_type *);
 
+extern bfd_boolean
+ldlang_override_segment_assignment
+  (struct bfd_link_info *, bfd *, asection *, asection *, bfd_boolean);
+
 #endif
diff --git a/ld/ldmain.c b/ld/ldmain.c
index 9e6a0c3..f47758f 100644
--- a/ld/ldmain.c
+++ b/ld/ldmain.c
@@ -161,7 +161,8 @@ static struct bfd_link_callbacks link_callbacks =
   reloc_dangerous,
   unattached_reloc,
   notice,
-  einfo
+  einfo,
+  ldlang_override_segment_assignment
 };
 
 struct bfd_link_info link_info;
-- 
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