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[binutils-gdb] [GOLD] R_PPC64_ENTRY support


https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=549dba71045c856f3d169bf2edc7bfc7cabe5a0b

commit 549dba71045c856f3d169bf2edc7bfc7cabe5a0b
Author: Alan Modra <amodra@gmail.com>
Date:   Mon Dec 7 13:15:24 2015 +1030

    [GOLD] R_PPC64_ENTRY support
    
    elfcpp/
    	* powerpc.h (R_PPC64_ENTRY): Define.
    gold/
    	* powerpc.cc (add_2_2_12, ld_2_12, lis_2): Define.
    	(Target_powerpc::Scan::local, global): Handle R_PPC64_ENTRY.
    	(Target_powerpc::Relocate::relocate): Edit code at R_PPC64_ENTRY.

Diff:
---
 elfcpp/ChangeLog |  4 ++++
 elfcpp/powerpc.h |  1 +
 gold/ChangeLog   |  6 ++++++
 gold/powerpc.cc  | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 58 insertions(+)

diff --git a/elfcpp/ChangeLog b/elfcpp/ChangeLog
index c443334..0aa8627 100644
--- a/elfcpp/ChangeLog
+++ b/elfcpp/ChangeLog
@@ -1,3 +1,7 @@
+2015-12-07  Alan Modra  <amodra@gmail.com>
+
+	* powerpc.h (R_PPC64_ENTRY): Define.
+
 2015-11-11  Alan Modra  <amodra@gmail.com>
             Peter Bergner <bergner@vnet.ibm.com>
 
diff --git a/elfcpp/powerpc.h b/elfcpp/powerpc.h
index ae30c8a..a8b005e 100644
--- a/elfcpp/powerpc.h
+++ b/elfcpp/powerpc.h
@@ -178,6 +178,7 @@ enum
   R_PPC_EMB_RELSDA = 116,
   R_PPC64_REL24_NOTOC = 116,
   R_PPC64_ADDR64_LOCAL = 117,
+  R_PPC64_ENTRY = 118,
 
   R_PPC_VLE_REL8 = 216,
   R_PPC_VLE_REL15 = 217,
diff --git a/gold/ChangeLog b/gold/ChangeLog
index 5ead7da..c4bf4a4 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,3 +1,9 @@
+2015-12-07  Alan Modra  <amodra@gmail.com>
+
+	* powerpc.cc (add_2_2_12, ld_2_12, lis_2): Define.
+	(Target_powerpc::Scan::local, global): Handle R_PPC64_ENTRY.
+	(Target_powerpc::Relocate::relocate): Edit code at R_PPC64_ENTRY.
+
 2015-12-03  Vladimir Radosavljevic <Vladimir.Radosavljevic@imgtec.com>
 
 	* object.cc (Sized_relobj::do_for_all_local_got_entries): Use
diff --git a/gold/powerpc.cc b/gold/powerpc.cc
index 39a0324..12215ff 100644
--- a/gold/powerpc.cc
+++ b/gold/powerpc.cc
@@ -3224,6 +3224,7 @@ Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry(
 
 static const uint32_t add_0_11_11	= 0x7c0b5a14;
 static const uint32_t add_2_2_11	= 0x7c425a14;
+static const uint32_t add_2_2_12	= 0x7c426214;
 static const uint32_t add_3_3_2		= 0x7c631214;
 static const uint32_t add_3_3_13	= 0x7c636a14;
 static const uint32_t add_11_0_11	= 0x7d605a14;
@@ -3258,6 +3259,7 @@ static const uint32_t ld_0_12		= 0xe80c0000;
 static const uint32_t ld_2_1		= 0xe8410000;
 static const uint32_t ld_2_2		= 0xe8420000;
 static const uint32_t ld_2_11		= 0xe84b0000;
+static const uint32_t ld_2_12		= 0xe84c0000;
 static const uint32_t ld_11_2		= 0xe9620000;
 static const uint32_t ld_11_11		= 0xe96b0000;
 static const uint32_t ld_12_2		= 0xe9820000;
@@ -3267,6 +3269,7 @@ static const uint32_t lfd_0_1		= 0xc8010000;
 static const uint32_t li_0_0		= 0x38000000;
 static const uint32_t li_12_0		= 0x39800000;
 static const uint32_t lis_0		= 0x3c000000;
+static const uint32_t lis_2		= 0x3c400000;
 static const uint32_t lis_11		= 0x3d600000;
 static const uint32_t lis_12		= 0x3d800000;
 static const uint32_t lvx_0_12_0	= 0x7c0c00ce;
@@ -5607,6 +5610,7 @@ Target_powerpc<size, big_endian>::Scan::local(
     case elfcpp::R_POWERPC_GNU_VTENTRY:
     case elfcpp::R_PPC64_TOCSAVE:
     case elfcpp::R_POWERPC_TLS:
+    case elfcpp::R_PPC64_ENTRY:
       break;
 
     case elfcpp::R_PPC64_TOC:
@@ -5982,6 +5986,7 @@ Target_powerpc<size, big_endian>::Scan::global(
     case elfcpp::R_POWERPC_GNU_VTENTRY:
     case elfcpp::R_PPC_LOCAL24PC:
     case elfcpp::R_POWERPC_TLS:
+    case elfcpp::R_PPC64_ENTRY:
       break;
 
     case elfcpp::R_PPC64_TOC:
@@ -7655,6 +7660,48 @@ Target_powerpc<size, big_endian>::Relocate::relocate(
 		}
 	    }
 	  break;
+
+	case elfcpp::R_PPC64_ENTRY:
+	  value = (target->got_section()->output_section()->address()
+		   + object->toc_base_offset());
+	  if (value + 0x80008000 <= 0xffffffff
+	      && !parameters->options().output_is_position_independent())
+	    {
+	      Insn* iview = reinterpret_cast<Insn*>(view);
+	      Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview);
+	      Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1);
+
+	      if ((insn1 & ~0xfffc) == ld_2_12
+		  && insn2 == add_2_2_12)
+		{
+		  insn1 = lis_2 + ha(value);
+		  elfcpp::Swap<32, big_endian>::writeval(iview, insn1);
+		  insn2 = addi_2_2 + l(value);
+		  elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2);
+		  return true;
+		}
+	    }
+	  else
+	    {
+	      value -= address;
+	      if (value + 0x80008000 <= 0xffffffff)
+		{
+		  Insn* iview = reinterpret_cast<Insn*>(view);
+		  Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview);
+		  Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1);
+
+		  if ((insn1 & ~0xfffc) == ld_2_12
+		      && insn2 == add_2_2_12)
+		    {
+		      insn1 = addis_2_12 + ha(value);
+		      elfcpp::Swap<32, big_endian>::writeval(iview, insn1);
+		      insn2 = addi_2_2 + l(value);
+		      elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2);
+		      return true;
+		    }
+		}
+	    }
+	  break;
 	}
     }


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