#ifndef CODEGEN_ELF_H
#define CODEGEN_ELF_H
-#include "llvm/GlobalVariable.h"
#include "llvm/CodeGen/BinaryObject.h"
#include "llvm/CodeGen/MachineRelocation.h"
#include "llvm/Support/DataTypes.h"
-#include <cstring>
namespace llvm {
- class BinaryObject;
+ class GlobalValue;
// Identification Indexes
enum {
IsConstant(false), NameIdx(0), Value(0),
Size(0), Info(0), Other(STV_DEFAULT),
SectionIdx(ELFSection::SHN_UNDEF),
- SymTabIdx(0) {
- if (!GV)
- return;
-
- switch (GV->getVisibility()) {
- default:
- assert(0 && "unknown visibility type");
- case GlobalValue::DefaultVisibility:
- Other = STV_DEFAULT;
- break;
- case GlobalValue::HiddenVisibility:
- Other = STV_HIDDEN;
- break;
- case GlobalValue::ProtectedVisibility:
- Other = STV_PROTECTED;
- break;
- }
- }
-
- unsigned getBind() {
- return (Info >> 4) & 0xf;
- }
+ SymTabIdx(0) {}
- unsigned getType() {
- return Info & 0xf;
- }
+ unsigned getBind() { return (Info >> 4) & 0xf; }
+ unsigned getType() { return Info & 0xf; }
void setBind(unsigned X) {
assert(X == (X & 0xF) && "Bind value out of range!");
Info = (Info & 0x0F) | (X << 4);
}
+
void setType(unsigned X) {
assert(X == (X & 0xF) && "Type value out of range!");
Info = (Info & 0xF0) | X;
}
+
+ void setVisibility(unsigned V) {
+ assert(V == (V & 0x3) && "Type value out of range!");
+ Other = V;
+ }
};
/// ELFRelocation - This class contains all the information necessary to
#define DEBUG_TYPE "elfce"
+#include "ELF.h"
+#include "ELFWriter.h"
#include "ELFCodeEmitter.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/CodeGen/BinaryObject.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
+#include "llvm/CodeGen/MachineRelocation.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Support/Debug.h"
//===----------------------------------------------------------------------===//
/// finishFunction - This callback is invoked after the function is completely
/// finished.
bool ELFCodeEmitter::finishFunction(MachineFunction &MF) {
- // Add a symbol to represent the function.
- ELFSym FnSym(MF.getFunction());
-
// Update Section Size
ES->Size = CurBufferPtr - BufferBegin;
- // Set the symbol type as a function
+ // Add a symbol to represent the function.
+ const Function *F = MF.getFunction();
+ ELFSym FnSym(F);
FnSym.setType(ELFSym::STT_FUNC);
+ FnSym.setBind(EW.getGlobalELFLinkage(F));
+ FnSym.setVisibility(EW.getGlobalELFVisibility(F));
FnSym.SectionIdx = ES->SectionIdx;
FnSym.Size = CurBufferPtr-FnStartPtr;
// Offset from start of Section
FnSym.Value = FnStartPtr-BufferBegin;
- // Figure out the binding (linkage) of the symbol.
- switch (MF.getFunction()->getLinkage()) {
- default:
- // appending linkage is illegal for functions.
- assert(0 && "Unknown linkage type!");
- case GlobalValue::ExternalLinkage:
- FnSym.setBind(ELFSym::STB_GLOBAL);
- EW.SymbolList.push_back(FnSym);
- break;
- case GlobalValue::LinkOnceAnyLinkage:
- case GlobalValue::LinkOnceODRLinkage:
- case GlobalValue::WeakAnyLinkage:
- case GlobalValue::WeakODRLinkage:
- FnSym.setBind(ELFSym::STB_WEAK);
- EW.SymbolList.push_back(FnSym);
- break;
- case GlobalValue::PrivateLinkage:
- assert (0 && "PrivateLinkage should not be in the symbol table.");
- case GlobalValue::InternalLinkage:
- FnSym.setBind(ELFSym::STB_LOCAL);
- EW.SymbolList.push_front(FnSym);
- break;
+ // Locals should go on the symbol list front
+ if (!F->hasPrivateLinkage()) {
+ if (FnSym.getBind() == ELFSym::STB_LOCAL)
+ EW.SymbolList.push_front(FnSym);
+ else
+ EW.SymbolList.push_back(FnSym);
}
// Emit constant pool to appropriate section(s)
#ifndef ELFCODEEMITTER_H
#define ELFCODEEMITTER_H
-#include "ELFWriter.h"
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include <vector>
namespace llvm {
+ class ELFWriter;
+ class ELFSection;
/// ELFCodeEmitter - This class is used by the ELFWriter to
/// emit the code for functions to the ELF file.
#define DEBUG_TYPE "elfwriter"
+#include "ELF.h"
#include "ELFWriter.h"
#include "ELFCodeEmitter.h"
-#include "ELF.h"
#include "llvm/Constants.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/CodeGen/FileWriters.h"
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetELFWriterInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Support/Streams.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Debug.h"
-#include <list>
using namespace llvm;
char ELFWriter::ID = 0;
return false;
}
-unsigned ELFWriter::getGlobalELFLinkage(const GlobalVariable *GV) {
+unsigned ELFWriter::getGlobalELFVisibility(const GlobalValue *GV) {
+ switch (GV->getVisibility()) {
+ default:
+ assert(0 && "unknown visibility type");
+ case GlobalValue::DefaultVisibility:
+ return ELFSym::STV_DEFAULT;
+ case GlobalValue::HiddenVisibility:
+ return ELFSym::STV_HIDDEN;
+ case GlobalValue::ProtectedVisibility:
+ return ELFSym::STV_PROTECTED;
+ }
+
+ return 0;
+}
+
+unsigned ELFWriter::getGlobalELFLinkage(const GlobalValue *GV) {
if (GV->hasInternalLinkage())
return ELFSym::STB_LOCAL;
ELFSym GblSym(F);
GblSym.setBind(ELFSym::STB_GLOBAL);
GblSym.setType(ELFSym::STT_NOTYPE);
+ GblSym.setVisibility(ELFSym::STV_DEFAULT);
GblSym.SectionIdx = ELFSection::SHN_UNDEF;
SymbolList.push_back(GblSym);
}
unsigned Align=0, Size=0;
ELFSym GblSym(GV);
GblSym.setBind(SymBind);
+ GblSym.setVisibility(getGlobalELFVisibility(GV));
if (GV->hasInitializer()) {
GblSym.setType(ELFSym::STT_OBJECT);
SectionSym.Size = 0;
SectionSym.setBind(ELFSym::STB_LOCAL);
SectionSym.setType(ELFSym::STT_SECTION);
+ SectionSym.setVisibility(ELFSym::STV_DEFAULT);
// Local symbols go in the list front
SymbolList.push_front(SectionSym);
// Get the relocation section for section 'I'
bool HasRelA = TEW->hasRelocationAddend();
- ELFSection &RelSec = getRelocSection(I->getName(), HasRelA);
+ ELFSection &RelSec = getRelocSection(I->getName(), HasRelA,
+ TEW->getPrefELFAlignment());
// 'Link' - Section hdr idx of the associated symbol table
// 'Info' - Section hdr idx of the section to which the relocation applies
#include "llvm/ADT/SetVector.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetELFWriterInfo.h"
-#include "ELF.h"
#include <list>
#include <map>
namespace llvm {
class BinaryObject;
+ class Constant;
class ConstantStruct;
class ELFCodeEmitter;
class GlobalVariable;
class Mangler;
class MachineCodeEmitter;
+ class TargetAsmInfo;
+ class TargetELFWriterInfo;
class raw_ostream;
+ class ELFSection;
+ class ELFSym;
+ class ELFRelocation;
/// ELFWriter - This class implements the common target-independent code for
/// writing ELF files. Targets should derive a class from this to
/// Return the relocation section of section 'S'. 'RelA' is true
/// if the relocation section contains entries with addends.
- ELFSection &getRelocSection(std::string SName, bool RelA) {
+ ELFSection &getRelocSection(std::string SName, bool RelA, unsigned Align) {
std::string RelSName(".rel");
unsigned SHdrTy = RelA ? ELFSection::SHT_RELA : ELFSection::SHT_REL;
if (RelA) RelSName.append("a");
RelSName.append(SName);
- return getSection(RelSName, SHdrTy, 0, TEW->getPrefELFAlignment());
+ return getSection(RelSName, SHdrTy, 0, Align);
}
ELFSection &getNonExecStackSection() {
return getSection("", ELFSection::SHT_NULL, 0);
}
+ // Helpers for obtaining ELF specific Linkage and Visibility info.
+ unsigned getGlobalELFLinkage(const GlobalValue *GV);
+ unsigned getGlobalELFVisibility(const GlobalValue *GV);
+
// As we complete the ELF file, we need to update fields in the ELF header
// (e.g. the location of the section table). These members keep track of
// the offset in ELFHeader of these various pieces to update and other
void EmitGlobalConstant(const Constant *C, ELFSection &GblS);
void EmitGlobalConstantStruct(const ConstantStruct *CVS,
ELFSection &GblS);
- unsigned getGlobalELFLinkage(const GlobalVariable *GV);
ELFSection &getGlobalSymELFSection(const GlobalVariable *GV, ELFSym &Sym);
void EmitRelocations();
void EmitRelocation(BinaryObject &RelSec, ELFRelocation &Rel, bool HasRelA);
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