From: H.J. Lu <hjl.tools@gmail.com>
Date: Tue, 10 Jan 2012 20:58:36 +0000 (+0000)
Subject: Properly handle R_X86_64_32 for x32
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3660ff060af103d25a45e40abe7f5523a20d3455;p=binutils-gdb.git

Properly handle R_X86_64_32 for x32

2012-01-10  H.J. Lu  <hongjiu.lu@intel.com>

	* x86_64.cc (Scan::check_non_pic): Allow R_X86_64_32 for x32.
	(Scan::local): Use R_X86_64_RELATIVE relocation for R_X86_64_32
	under x32.
---

diff --git a/gold/ChangeLog b/gold/ChangeLog
index cdbdda20b22..62f79f5d87f 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,3 +1,9 @@
+2012-01-10  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* x86_64.cc (Scan::check_non_pic): Allow R_X86_64_32 for x32.
+	(Scan::local): Use R_X86_64_RELATIVE relocation for R_X86_64_32
+	under x32.
+
 2012-01-09  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* x86_64.cc: Initial support for x32.
diff --git a/gold/x86_64.cc b/gold/x86_64.cc
index 97a440d32cd..3a2cacef483 100644
--- a/gold/x86_64.cc
+++ b/gold/x86_64.cc
@@ -1971,6 +1971,9 @@ Target_x86_64<size>::Scan::check_non_pic(Relobj* object, unsigned int r_type,
 	return;
       /* Fall through.  */
     case elfcpp::R_X86_64_32:
+      // R_X86_64_32 is OK for x32.
+      if (size == 32 && r_type == elfcpp::R_X86_64_32)
+	return;
       if (this->issued_non_pic_error_)
 	return;
       gold_assert(parameters->options().output_is_position_independent());
@@ -2079,6 +2082,19 @@ Target_x86_64<size>::Scan::local(Symbol_table* symtab,
       // because that is always a 64-bit relocation.
       if (parameters->options().output_is_position_independent())
         {
+	  // Use R_X86_64_RELATIVE relocation for R_X86_64_32 under x32.
+	  if (size == 32 && r_type == elfcpp::R_X86_64_32)
+	    {
+	      unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+	      Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+	      rela_dyn->add_local_relative(object, r_sym,
+					   elfcpp::R_X86_64_RELATIVE,
+					   output_section, data_shndx,
+					   reloc.get_r_offset(),
+					   reloc.get_r_addend(), is_ifunc);
+	      break;
+	    }
+
           this->check_non_pic(object, r_type, NULL);
 
           Reloc_section* rela_dyn = target->rela_dyn_section(layout);