Major update of the MicroBlaze backend. The new features are:

[oota-llvm.git] / lib / Target / MBlaze / MBlazeELFWriterInfo.cpp

diff --git a/lib/Target/MBlaze/MBlazeELFWriterInfo.cpp b/lib/Target/MBlaze/MBlazeELFWriterInfo.cpp
new file mode 100644 (file)
index 0000000..378b5d4
--- /dev/null
+++ b/lib/Target/MBlaze/MBlazeELFWriterInfo.cpp
@@ -0,0 +1,110 @@
+//===-- MBlazeELFWriterInfo.cpp - ELF Writer Info for the MBlaze backend --===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements ELF writer information for the MBlaze backend.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MBlazeELFWriterInfo.h"
+#include "MBlazeRelocations.h"
+#include "llvm/Function.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+//  Implementation of the MBlazeELFWriterInfo class
+//===----------------------------------------------------------------------===//
+
+MBlazeELFWriterInfo::MBlazeELFWriterInfo(TargetMachine &TM)
+  : TargetELFWriterInfo(TM.getTargetData()->getPointerSizeInBits() == 64,
+                        TM.getTargetData()->isLittleEndian()) {
+}
+
+MBlazeELFWriterInfo::~MBlazeELFWriterInfo() {}
+
+unsigned MBlazeELFWriterInfo::getRelocationType(unsigned MachineRelTy) const {
+  switch(MachineRelTy) {
+  case MBlaze::reloc_pcrel_word:
+    return R_MICROBLAZE_64_PCREL;
+  case MBlaze::reloc_absolute_word:
+    return R_MICROBLAZE_NONE;
+  default:
+    llvm_unreachable("unknown mblaze machine relocation type");
+  }
+  return 0;
+}
+
+long int MBlazeELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy,
+                                                    long int Modifier) const {
+  switch(RelTy) {
+  case R_MICROBLAZE_32_PCREL:
+    return Modifier - 4;
+  case R_MICROBLAZE_32:
+    return Modifier;
+  default:
+    llvm_unreachable("unknown mblaze relocation type");
+  }
+  return 0;
+}
+
+unsigned MBlazeELFWriterInfo::getRelocationTySize(unsigned RelTy) const {
+  // FIXME: Most of these sizes are guesses based on the name
+  switch(RelTy) {
+  case R_MICROBLAZE_32:
+  case R_MICROBLAZE_32_PCREL:
+  case R_MICROBLAZE_32_PCREL_LO:
+  case R_MICROBLAZE_32_LO:
+  case R_MICROBLAZE_SRO32:
+  case R_MICROBLAZE_SRW32:
+  case R_MICROBLAZE_32_SYM_OP_SYM:
+  case R_MICROBLAZE_GOTOFF_32:
+    return 32;
+
+  case R_MICROBLAZE_64_PCREL:
+  case R_MICROBLAZE_64:
+  case R_MICROBLAZE_GOTPC_64:
+  case R_MICROBLAZE_GOT_64:
+  case R_MICROBLAZE_PLT_64:
+  case R_MICROBLAZE_GOTOFF_64:
+    return 64;
+  }
+
+  return 0;
+}
+
+bool MBlazeELFWriterInfo::isPCRelativeRel(unsigned RelTy) const {
+  // FIXME: Most of these are guesses based on the name
+  switch(RelTy) {
+  case R_MICROBLAZE_32_PCREL:
+  case R_MICROBLAZE_64_PCREL:
+  case R_MICROBLAZE_32_PCREL_LO:
+  case R_MICROBLAZE_GOTPC_64:
+    return true;
+  }
+
+  return false;
+}
+
+unsigned MBlazeELFWriterInfo::getAbsoluteLabelMachineRelTy() const {
+  return MBlaze::reloc_absolute_word;
+}
+
+long int MBlazeELFWriterInfo::computeRelocation(unsigned SymOffset,
+                                                unsigned RelOffset,
+                                                unsigned RelTy) const {
+  if (RelTy == R_MICROBLAZE_32_PCREL || R_MICROBLAZE_64_PCREL)
+    return SymOffset - (RelOffset + 4);
+  else
+    assert("computeRelocation unknown for this relocation type");
+
+  return 0;
+}