* arm.cc (Arm_relocate_functions::extract_arm_movw_movt_addend):

	New function.
	(Arm_relocate_functions::insert_val_arm_movw_movt): New function.
	(Arm_relocate_functions::extract_thumb_movw_movt_addend): New
	function.
	(Arm_relocate_functions::insert_val_thumb_movw_movt): New
	function.
	(Arm_relocate_functions::movw_abs_nc): New function.
	(Arm_relocate_functions::movt_abs): New function.
	(Arm_relocate_functions::thm_movw_abs_nc): New function.
	(Arm_relocate_functions::thm_movt_abs): New function.
	(Scan::local): Handle R_ARM_MOVW_ABS_NC, R_ARM_MOVT_ABS,
	R_ARM_THM_MOVW_ABS_NC, R_ARM_THM_MOVT_ABS.
	(Scan::global): Likewise.
	(Relocate::relocate): Likewise.
	(Relocatable_size_for_reloc::get_size_for_reloc): Likewise.

diff --git a/gold/ChangeLog b/gold/ChangeLog
index 28f76fb50f9263b530837af20701106fde20822b..4a2e831a2604e652a24fc65c194f04605fb011ee 100644 (file)
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,3 +1,22 @@
+2009-10-07  Viktor Kutuzov  <vkutuzov@accesssoftek.com>
+
+       * arm.cc (Arm_relocate_functions::extract_arm_movw_movt_addend):
+       New function.
+       (Arm_relocate_functions::insert_val_arm_movw_movt): New function.
+       (Arm_relocate_functions::extract_thumb_movw_movt_addend): New
+       function.
+       (Arm_relocate_functions::insert_val_thumb_movw_movt): New
+       function.
+       (Arm_relocate_functions::movw_abs_nc): New function.
+       (Arm_relocate_functions::movt_abs): New function.
+       (Arm_relocate_functions::thm_movw_abs_nc): New function.
+       (Arm_relocate_functions::thm_movt_abs): New function.
+       (Scan::local): Handle R_ARM_MOVW_ABS_NC, R_ARM_MOVT_ABS,
+       R_ARM_THM_MOVW_ABS_NC, R_ARM_THM_MOVT_ABS.
+       (Scan::global): Likewise.
+       (Relocate::relocate): Likewise.
+       (Relocatable_size_for_reloc::get_size_for_reloc): Likewise.
+
 2009-10-07  Viktor Kutuzov  <vkutuzov@accesssoftek.com>
 
        * arm.cc (Arm_relocate_functions::got_prel) New function.

diff --git a/gold/arm.cc b/gold/arm.cc
index f70964c5e8072f62975e36cfcdcbdfd0f7c34eda..d855092bc4cd05368b163e26f92364f981682d33 100644 (file)
--- a/gold/arm.cc
+++ b/gold/arm.cc
@@ -75,6 +75,10 @@ class Output_data_plt_arm;
 // R_ARM_TARGET1
 // R_ARM_PREL31
 // R_ARM_ABS8
+// R_ARM_MOVW_ABS_NC
+// R_ARM_MOVT_ABS
+// R_ARM_THM_MOVW_ABS_NC
+// R_ARM_THM_MOVT_ABS 
 // 
 // TODOs:
 // - Generate various branch stubs.
@@ -509,6 +513,79 @@ class Arm_relocate_functions : public Relocate_functions<32, big_endian>
       return psymval->value(object, addend);
   }
 
+  // Encoding of imm16 argument for movt and movw ARM instructions
+  // from ARM ARM:
+  //     
+  //     imm16 := imm4 | imm12
+  //
+  //  f e d c b a 9 8 7 6 5 4 3 2 1 0 f e d c b a 9 8 7 6 5 4 3 2 1 0 
+  // +-------+---------------+-------+-------+-----------------------+
+  // |       |               |imm4   |       |imm12                  |
+  // +-------+---------------+-------+-------+-----------------------+
+
+  // Extract the relocation addend from VAL based on the ARM
+  // instruction encoding described above.
+  static inline typename elfcpp::Swap<32, big_endian>::Valtype
+  extract_arm_movw_movt_addend(
+      typename elfcpp::Swap<32, big_endian>::Valtype val)
+  {
+    // According to the Elf ABI for ARM Architecture the immediate
+    // field is sign-extended to form the addend.
+    return utils::sign_extend<16>(((val >> 4) & 0xf000) | (val & 0xfff));
+  }
+
+  // Insert X into VAL based on the ARM instruction encoding described
+  // above.
+  static inline typename elfcpp::Swap<32, big_endian>::Valtype
+  insert_val_arm_movw_movt(
+      typename elfcpp::Swap<32, big_endian>::Valtype val,
+      typename elfcpp::Swap<32, big_endian>::Valtype x)
+  {
+    val &= 0xfff0f000;
+    val |= x & 0x0fff;
+    val |= (x & 0xf000) << 4;
+    return val;
+  }
+
+  // Encoding of imm16 argument for movt and movw Thumb2 instructions
+  // from ARM ARM:
+  //     
+  //     imm16 := imm4 | i | imm3 | imm8
+  //
+  //  f e d c b a 9 8 7 6 5 4 3 2 1 0  f e d c b a 9 8 7 6 5 4 3 2 1 0 
+  // +---------+-+-----------+-------++-+-----+-------+---------------+
+  // |         |i|           |imm4   || |imm3 |       |imm8           |
+  // +---------+-+-----------+-------++-+-----+-------+---------------+
+
+  // Extract the relocation addend from VAL based on the Thumb2
+  // instruction encoding described above.
+  static inline typename elfcpp::Swap<32, big_endian>::Valtype
+  extract_thumb_movw_movt_addend(
+      typename elfcpp::Swap<32, big_endian>::Valtype val)
+  {
+    // According to the Elf ABI for ARM Architecture the immediate
+    // field is sign-extended to form the addend.
+    return utils::sign_extend<16>(((val >> 4) & 0xf000)
+                                 | ((val >> 15) & 0x0800)
+                                 | ((val >> 4) & 0x0700)
+                                 | (val & 0x00ff));
+  }
+
+  // Insert X into VAL based on the Thumb2 instruction encoding
+  // described above.
+  static inline typename elfcpp::Swap<32, big_endian>::Valtype
+  insert_val_thumb_movw_movt(
+      typename elfcpp::Swap<32, big_endian>::Valtype val,
+      typename elfcpp::Swap<32, big_endian>::Valtype x)
+  {
+    val &= 0xfbf08f00;
+    val |= (x & 0xf000) << 4;
+    val |= (x & 0x0800) << 15;
+    val |= (x & 0x0700) << 4;
+    val |= (x & 0x00ff);
+    return val;
+  }
+
   // FIXME: This probably only works for Android on ARM v5te. We should
   // following GNU ld for the general case.
   template<unsigned r_type>
@@ -746,6 +823,79 @@ class Arm_relocate_functions : public Relocate_functions<32, big_endian>
     return (utils::has_overflow<31>(x) ?
            This::STATUS_OVERFLOW : This::STATUS_OKAY);
   }
+
+  // R_ARM_MOVW_ABS_NC: (S + A) | T
+  static inline typename This::Status 
+  movw_abs_nc(unsigned char *view,
+             const Sized_relobj<32, big_endian>* object,
+             const Symbol_value<32>* psymval,
+             bool has_thumb_bit)
+  {
+    typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
+    Valtype* wv = reinterpret_cast<Valtype*>(view);
+    Valtype val = elfcpp::Swap<32, big_endian>::readval(wv);
+    Valtype addend =  This::extract_arm_movw_movt_addend(val);
+    Valtype x = This::arm_symbol_value(object, psymval, addend, has_thumb_bit);
+    val = This::insert_val_arm_movw_movt(val, x);
+    elfcpp::Swap<32, big_endian>::writeval(wv, val);
+    return This::STATUS_OKAY;
+  }
+
+  // R_ARM_MOVT_ABS: S + A
+  static inline typename This::Status
+  movt_abs(unsigned char *view,
+          const Sized_relobj<32, big_endian>* object,
+           const Symbol_value<32>* psymval)
+  {
+    typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
+    Valtype* wv = reinterpret_cast<Valtype*>(view);
+    Valtype val = elfcpp::Swap<32, big_endian>::readval(wv);
+    Valtype addend = This::extract_arm_movw_movt_addend(val);
+    Valtype x = This::arm_symbol_value(object, psymval, addend, 0) >> 16;
+    val = This::insert_val_arm_movw_movt(val, x);
+    elfcpp::Swap<32, big_endian>::writeval(wv, val);
+    return This::STATUS_OKAY;
+  }
+
+  //  R_ARM_THM_MOVW_ABS_NC: S + A | T
+  static inline typename This::Status 
+  thm_movw_abs_nc(unsigned char *view,
+                 const Sized_relobj<32, big_endian>* object,
+                 const Symbol_value<32>* psymval,
+                 bool has_thumb_bit)
+  {
+    typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype;
+    typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype;
+    Valtype* wv = reinterpret_cast<Valtype*>(view);
+    Reltype val = ((elfcpp::Swap<16, big_endian>::readval(wv) << 16)
+                  | elfcpp::Swap<16, big_endian>::readval(wv + 1));
+    Reltype addend = extract_thumb_movw_movt_addend(val);
+    Reltype x = This::arm_symbol_value(object, psymval, addend, has_thumb_bit);
+    val = This::insert_val_thumb_movw_movt(val, x);
+    elfcpp::Swap<16, big_endian>::writeval(wv, val >> 16);
+    elfcpp::Swap<16, big_endian>::writeval(wv + 1, val & 0xffff);
+    return This::STATUS_OKAY;
+  }
+
+  //  R_ARM_THM_MOVT_ABS: S + A
+  static inline typename This::Status 
+  thm_movt_abs(unsigned char *view,
+              const Sized_relobj<32, big_endian>* object,
+              const Symbol_value<32>* psymval)
+  {
+    typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype;
+    typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype;
+    Valtype* wv = reinterpret_cast<Valtype*>(view);
+    Reltype val = ((elfcpp::Swap<16, big_endian>::readval(wv) << 16)
+                  | elfcpp::Swap<16, big_endian>::readval(wv + 1));
+    Reltype addend = This::extract_thumb_movw_movt_addend(val);
+    Reltype x = This::arm_symbol_value(object, psymval, addend, 0) >> 16;
+    val = This::insert_val_thumb_movw_movt(val, x);
+    elfcpp::Swap<16, big_endian>::writeval(wv, val >> 16);
+    elfcpp::Swap<16, big_endian>::writeval(wv + 1, val & 0xffff);
+    return This::STATUS_OKAY;
+  }
+
 };
 
 // Get the GOT section, creating it if necessary.
@@ -1156,6 +1306,10 @@ Target_arm<big_endian>::Scan::local(const General_options&,
     case elfcpp::R_ARM_PREL31:
     case elfcpp::R_ARM_JUMP24:
     case elfcpp::R_ARM_PLT32:
+    case elfcpp::R_ARM_MOVW_ABS_NC:
+    case elfcpp::R_ARM_MOVT_ABS:
+    case elfcpp::R_ARM_THM_MOVW_ABS_NC:
+    case elfcpp::R_ARM_THM_MOVT_ABS:
       break;
 
     case elfcpp::R_ARM_GOTOFF32:
@@ -1286,6 +1440,12 @@ Target_arm<big_endian>::Scan::global(const General_options&,
       }
       break;
 
+    case elfcpp::R_ARM_MOVW_ABS_NC:
+    case elfcpp::R_ARM_MOVT_ABS:
+    case elfcpp::R_ARM_THM_MOVW_ABS_NC:
+    case elfcpp::R_ARM_THM_MOVT_ABS:
+      break;
+
     case elfcpp::R_ARM_REL32:
     case elfcpp::R_ARM_PREL31:
       {
@@ -1679,6 +1839,47 @@ Target_arm<big_endian>::Relocate::relocate(
                                                     has_thumb_bit);
       break;
 
+    case elfcpp::R_ARM_MOVW_ABS_NC:
+      if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, true,
+                                   output_section))
+       reloc_status = Arm_relocate_functions::movw_abs_nc(view, object,
+                                                          psymval,
+                                                                  has_thumb_bit);
+      else
+       gold_error(_("relocation R_ARM_MOVW_ABS_NC cannot be used when making"
+                    "a shared object; recompile with -fPIC"));
+      break;
+
+    case elfcpp::R_ARM_MOVT_ABS:
+      if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, true,
+                                   output_section))
+       reloc_status = Arm_relocate_functions::movt_abs(view, object, psymval);
+      else
+       gold_error(_("relocation R_ARM_MOVT_ABS cannot be used when making"
+                    "a shared object; recompile with -fPIC"));
+      break;
+
+    case elfcpp::R_ARM_THM_MOVW_ABS_NC:
+      if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, true,
+                                   output_section))
+       reloc_status = Arm_relocate_functions::thm_movw_abs_nc(view, object,
+                                                              psymval,
+                                                                      has_thumb_bit);
+      else
+       gold_error(_("relocation R_ARM_THM_MOVW_ABS_NC cannot be used when"
+                    "making a shared object; recompile with -fPIC"));
+      break;
+
+    case elfcpp::R_ARM_THM_MOVT_ABS:
+      if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, true,
+                                   output_section))
+       reloc_status = Arm_relocate_functions::thm_movt_abs(view, object,
+                                                           psymval);
+      else
+       gold_error(_("relocation R_ARM_THM_MOVT_ABS cannot be used when"
+                    "making a shared object; recompile with -fPIC"));
+      break;
+
     case elfcpp::R_ARM_REL32:
       reloc_status = Arm_relocate_functions::rel32(view, object, psymval,
                                                   address, has_thumb_bit);
@@ -1869,6 +2070,10 @@ Target_arm<big_endian>::Relocatable_size_for_reloc::get_size_for_reloc(
     case elfcpp::R_ARM_CALL:
     case elfcpp::R_ARM_JUMP24:
     case elfcpp::R_ARM_PREL31:
+    case elfcpp::R_ARM_MOVW_ABS_NC:
+    case elfcpp::R_ARM_MOVT_ABS:
+    case elfcpp::R_ARM_THM_MOVW_ABS_NC:
+    case elfcpp::R_ARM_THM_MOVT_ABS:
       return 4;
 
     case elfcpp::R_ARM_TARGET1: