X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FX86%2FX86ELFWriterInfo.cpp;h=3b721b4fe0eb8ff047f96c3cebf94bc1c726457d;hb=d9e3385ced2dc887e2fe8e1c071bd2611e4d3ede;hp=e7c09098c405a4356421dbec114fabe927f8e44b;hpb=40d776469dcbb10237482debf2ba31f4924917e2;p=oota-llvm.git

diff --git a/lib/Target/X86/X86ELFWriterInfo.cpp b/lib/Target/X86/X86ELFWriterInfo.cpp
index e7c09098c40..3b721b4fe0e 100644
--- a/lib/Target/X86/X86ELFWriterInfo.cpp
+++ b/lib/Target/X86/X86ELFWriterInfo.cpp
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Bill Wendling and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -12,6 +12,141 @@
 //===----------------------------------------------------------------------===//
 
 #include "X86ELFWriterInfo.h"
+#include "X86Relocations.h"
+#include "llvm/Function.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+
 using namespace llvm;
 
-X86ELFWriterInfo::X86ELFWriterInfo() : TargetELFWriterInfo(EM_386) {}
+//===----------------------------------------------------------------------===//
+//  Implementation of the X86ELFWriterInfo class
+//===----------------------------------------------------------------------===//
+
+X86ELFWriterInfo::X86ELFWriterInfo(bool is64Bit_, bool isLittleEndian_)
+  : TargetELFWriterInfo(is64Bit_, isLittleEndian_) {
+    EMachine = is64Bit ? EM_X86_64 : EM_386;
+  }
+
+X86ELFWriterInfo::~X86ELFWriterInfo() {}
+
+unsigned X86ELFWriterInfo::getRelocationType(unsigned MachineRelTy) const {
+  if (is64Bit) {
+    switch(MachineRelTy) {
+    case X86::reloc_pcrel_word:
+      return R_X86_64_PC32;
+    case X86::reloc_absolute_word:
+      return R_X86_64_32;
+    case X86::reloc_absolute_word_sext:
+      return R_X86_64_32S;
+    case X86::reloc_absolute_dword:
+      return R_X86_64_64;
+    case X86::reloc_picrel_word:
+    default:
+      llvm_unreachable("unknown x86_64 machine relocation type");
+    }
+  } else {
+    switch(MachineRelTy) {
+    case X86::reloc_pcrel_word:
+      return R_386_PC32;
+    case X86::reloc_absolute_word:
+      return R_386_32;
+    case X86::reloc_absolute_word_sext:
+    case X86::reloc_absolute_dword:
+    case X86::reloc_picrel_word:
+    default:
+      llvm_unreachable("unknown x86 machine relocation type");
+    }
+  }
+  return 0;
+}
+
+long int X86ELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy,
+                                                    long int Modifier) const {
+  if (is64Bit) {
+    switch(RelTy) {
+    case R_X86_64_PC32: return Modifier - 4;
+    case R_X86_64_32:
+    case R_X86_64_32S:
+    case R_X86_64_64:
+      return Modifier;
+    default:
+      llvm_unreachable("unknown x86_64 relocation type");
+    }
+  } else {
+    switch(RelTy) {
+      case R_386_PC32: return Modifier - 4;
+      case R_386_32: return Modifier;
+    default:
+      llvm_unreachable("unknown x86 relocation type");
+    }
+  }
+  return 0;
+}
+
+unsigned X86ELFWriterInfo::getRelocationTySize(unsigned RelTy) const {
+  if (is64Bit) {
+    switch(RelTy) {
+      case R_X86_64_PC32:
+      case R_X86_64_32:
+      case R_X86_64_32S:
+        return 32;
+      case R_X86_64_64:
+        return 64;
+    default:
+      llvm_unreachable("unknown x86_64 relocation type");
+    }
+  } else {
+    switch(RelTy) {
+      case R_386_PC32:
+      case R_386_32:
+        return 32;
+    default:
+      llvm_unreachable("unknown x86 relocation type");
+    }
+  }
+  return 0;
+}
+
+bool X86ELFWriterInfo::isPCRelativeRel(unsigned RelTy) const {
+  if (is64Bit) {
+    switch(RelTy) {
+      case R_X86_64_PC32:
+        return true;
+      case R_X86_64_32:
+      case R_X86_64_32S:
+      case R_X86_64_64:
+        return false;
+    default:
+      llvm_unreachable("unknown x86_64 relocation type");
+    }
+  } else {
+    switch(RelTy) {
+      case R_386_PC32:
+        return true;
+      case R_386_32:
+        return false;
+    default:
+      llvm_unreachable("unknown x86 relocation type");
+    }
+  }
+  return 0;
+}
+
+unsigned X86ELFWriterInfo::getAbsoluteLabelMachineRelTy() const {
+  return is64Bit ?
+    X86::reloc_absolute_dword : X86::reloc_absolute_word;
+}
+
+long int X86ELFWriterInfo::computeRelocation(unsigned SymOffset,
+                                             unsigned RelOffset,
+                                             unsigned RelTy) const {
+
+  if (RelTy == R_X86_64_PC32 || RelTy == R_386_PC32)
+    return SymOffset - (RelOffset + 4);
+  else
+    assert("computeRelocation unknown for this relocation type");
+
+  return 0;
+}