From: Alan Modra <amodra@gmail.com>
Date: Thu, 20 Aug 2015 02:32:45 +0000 (+0930)
Subject: gold --emit-relocs
X-Git-Tag: users/ARM/embedded-binutils-2_26-branch-2016q1~900
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9215b98bb27c071386a277f5578dbb17569a1471;p=external%2Fbinutils.git

gold --emit-relocs

A symbol value in an ELF final linked binary is absolute, in contrast
to a relocatable object file where the value is section relative.  For
--emit-relocs it is therefore incorrect to use the value of a section
symbol as the addend when adjusting relocs against input section
symbols to output section symbols.

	PR gold/18846
	* target-reloc.h (relocate_relocs <RELOC_ADJUST_FOR_SECTION_RELA>):
	Subtract os->address() from addend.
	* powerpc.cc (relocate_relocs): Likewise.
---

diff --git a/gold/ChangeLog b/gold/ChangeLog
index 0c5a40c..b3417b2 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,3 +1,10 @@
+2015-08-20  Alan Modra  <amodra@gmail.com>
+
+	PR gold/18846
+	* target-reloc.h (relocate_relocs <RELOC_ADJUST_FOR_SECTION_RELA>):
+	Subtract os->address() from addend.
+	* powerpc.cc (relocate_relocs): Likewise.
+
 2015-08-12  Simon Dardis  <simon.dardis@imgtec.com>
 
 	* mips.cc (plt0_entry_o32, plt0_entry_n32, plt0_entry_n64,
diff --git a/gold/powerpc.cc b/gold/powerpc.cc
index 540e197..3311a1d 100644
--- a/gold/powerpc.cc
+++ b/gold/powerpc.cc
@@ -8110,6 +8110,7 @@ Target_powerpc<size, big_endian>::relocate_relocs(
 	}
 
       // Get the new symbol index.
+      Output_section* os = NULL;
       if (r_sym < local_count)
 	{
 	  switch (strategy)
@@ -8134,7 +8135,7 @@ Target_powerpc<size, big_endian>::relocate_relocs(
 		unsigned int shndx =
 		  object->local_symbol_input_shndx(r_sym, &is_ordinary);
 		gold_assert(is_ordinary);
-		Output_section* os = object->output_section(shndx);
+		os = object->output_section(shndx);
 		gold_assert(os != NULL);
 		gold_assert(os->needs_symtab_index());
 		r_sym = os->symtab_index();
@@ -8187,7 +8188,8 @@ Target_powerpc<size, big_endian>::relocate_relocs(
       else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA)
 	{
 	  const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym);
-	  addend = psymval->value(object, addend);
+	  gold_assert(os != NULL);
+	  addend = psymval->value(object, addend) - os->address();
 	}
       else if (strategy == Relocatable_relocs::RELOC_SPECIAL)
 	{
diff --git a/gold/target-reloc.h b/gold/target-reloc.h
index c135459..89906af 100644
--- a/gold/target-reloc.h
+++ b/gold/target-reloc.h
@@ -666,6 +666,7 @@ relocate_relocs(
 
       // Get the new symbol index.
 
+      Output_section* os = NULL;
       unsigned int new_symndx;
       if (r_sym < local_count)
 	{
@@ -698,7 +699,7 @@ relocate_relocs(
 		unsigned int shndx =
 		  object->local_symbol_input_shndx(r_sym, &is_ordinary);
 		gold_assert(is_ordinary);
-		Output_section* os = object->output_section(shndx);
+		os = object->output_section(shndx);
 		gold_assert(os != NULL);
 		gold_assert(os->needs_symtab_index());
 		new_symndx = os->symtab_index();
@@ -780,7 +781,8 @@ relocate_relocs(
 		typename elfcpp::Elf_types<size>::Elf_Swxword addend;
 		addend = Reloc_types<sh_type, size, big_endian>::
 			   get_reloc_addend(&reloc);
-		addend = psymval->value(object, addend);
+		gold_assert(os != NULL);
+		addend = psymval->value(object, addend) - os->address();
 		Reloc_types<sh_type, size, big_endian>::
 		  set_reloc_addend(&reloc_write, addend);
 	      }