[llvm-c] Improve TargetMachine bindings

[oota-llvm.git] / lib / MC / MCELFObjectTargetWriter.cpp

diff --git a/lib/MC/MCELFObjectTargetWriter.cpp b/lib/MC/MCELFObjectTargetWriter.cpp
index a2715dedf41a5ef9d33dd5aea9f78f39fa3dbb47..0c39e4a17efd5ae5a829d899c3d7d603796a477b 100644 (file)
--- a/lib/MC/MCELFObjectTargetWriter.cpp
+++ b/lib/MC/MCELFObjectTargetWriter.cpp
@@ -7,12 +7,55 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/MC/MCELFObjectWriter.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCValue.h"
 
 using namespace llvm;
 
-MCELFObjectTargetWriter::MCELFObjectTargetWriter() {
+MCELFObjectTargetWriter::MCELFObjectTargetWriter(bool Is64Bit_,
+                                                 uint8_t OSABI_,
+                                                 uint16_t EMachine_,
+                                                 bool HasRelocationAddend_,
+                                                 bool IsN64_)
+  : OSABI(OSABI_), EMachine(EMachine_),
+    HasRelocationAddend(HasRelocationAddend_), Is64Bit(Is64Bit_),
+    IsN64(IsN64_){
 }
 
-MCELFObjectTargetWriter::~MCELFObjectTargetWriter() {
+const MCSymbol *MCELFObjectTargetWriter::ExplicitRelSym(const MCAssembler &Asm,
+                                                        const MCValue &Target,
+                                                        const MCFragment &F,
+                                                        const MCFixup &Fixup,
+                                                        bool IsPCRel) const {
+  return NULL;
+}
+
+const MCSymbol *MCELFObjectTargetWriter::undefinedExplicitRelSym(const MCValue &Target,
+                                                                 const MCFixup &Fixup,
+                                                                 bool IsPCRel) const {
+  const MCSymbol &Symbol = Target.getSymA()->getSymbol();
+  return &Symbol.AliasedSymbol();
+}
+
+// ELF doesn't require relocations to be in any order. We sort by the r_offset,
+// just to match gnu as for easier comparison. The use type and index is an
+// arbitrary way of making the sort deterministic.
+static int cmpRel(const ELFRelocationEntry *AP, const ELFRelocationEntry *BP) {
+  const ELFRelocationEntry &A = *AP;
+  const ELFRelocationEntry &B = *BP;
+  if (A.r_offset != B.r_offset)
+    return B.r_offset - A.r_offset;
+  if (B.Type != A.Type)
+    return A.Type - B.Type;
+  if (B.Index != A.Index)
+    return B.Index - A.Index;
+  llvm_unreachable("ELFRelocs might be unstable!");
+}
+
+void
+MCELFObjectTargetWriter::sortRelocs(const MCAssembler &Asm,
+                                    std::vector<ELFRelocationEntry> &Relocs) {
+  array_pod_sort(Relocs.begin(), Relocs.end(), cmpRel);
 }