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 cdbdda20b22abc7ac7aa7559085bf957358dee8a..62f79f5d87fb3140759e2735d4c82863c542e37c 100644 (file)
--- 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 97a440d32cd4bb36581c9d879e4d2b033cfac814..3a2cacef483474f4fe4dbb45abf5943649f0a78f 100644 (file)
--- 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);