#define LLVM_OBJECT_RELOCVISITOR_H
#include "llvm/ADT/StringRef.h"
+#include "llvm/Object/COFF.h"
+#include "llvm/Object/ELFObjectFile.h"
+#include "llvm/Object/MachO.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ELF.h"
+#include "llvm/Support/MachO.h"
#include "llvm/Support/raw_ostream.h"
namespace llvm {
// The width of the value; how many bytes to touch when applying the
// relocation.
char Width;
- RelocToApply(const RelocToApply &In) : Value(In.Value), Width(In.Width) {}
RelocToApply(int64_t Value, char Width) : Value(Value), Width(Width) {}
RelocToApply() : Value(0), Width(0) {}
};
/// @brief Base class for object file relocation visitors.
class RelocVisitor {
public:
- explicit RelocVisitor(StringRef FileFormat)
- : FileFormat(FileFormat), HasError(false) {}
+ explicit RelocVisitor(const ObjectFile &Obj)
+ : ObjToVisit(Obj), HasError(false) {}
// TODO: Should handle multiple applied relocations via either passing in the
// previously computed value or just count paired relocations as a single
// visit.
- RelocToApply visit(uint32_t RelocType, RelocationRef R, uint64_t SecAddr = 0,
- uint64_t Value = 0) {
- if (FileFormat == "ELF64-x86-64") {
- switch (RelocType) {
+ RelocToApply visit(uint32_t RelocType, RelocationRef R, uint64_t Value = 0) {
+ if (isa<ELFObjectFileBase>(ObjToVisit))
+ return visitELF(RelocType, R, Value);
+ if (isa<COFFObjectFile>(ObjToVisit))
+ return visitCOFF(RelocType, R, Value);
+ if (isa<MachOObjectFile>(ObjToVisit))
+ return visitMachO(RelocType, R, Value);
+
+ HasError = true;
+ return RelocToApply();
+ }
+
+ bool error() { return HasError; }
+
+private:
+ const ObjectFile &ObjToVisit;
+ bool HasError;
+
+ RelocToApply visitELF(uint32_t RelocType, RelocationRef R, uint64_t Value) {
+ if (ObjToVisit.getBytesInAddress() == 8) { // 64-bit object file
+ switch (ObjToVisit.getArch()) {
+ case Triple::x86_64:
+ switch (RelocType) {
case llvm::ELF::R_X86_64_NONE:
return visitELF_X86_64_NONE(R);
case llvm::ELF::R_X86_64_64:
return visitELF_X86_64_64(R, Value);
case llvm::ELF::R_X86_64_PC32:
- return visitELF_X86_64_PC32(R, Value, SecAddr);
+ return visitELF_X86_64_PC32(R, Value);
case llvm::ELF::R_X86_64_32:
return visitELF_X86_64_32(R, Value);
case llvm::ELF::R_X86_64_32S:
default:
HasError = true;
return RelocToApply();
- }
- } else if (FileFormat == "ELF32-i386") {
- switch (RelocType) {
- case llvm::ELF::R_386_NONE:
- return visitELF_386_NONE(R);
- case llvm::ELF::R_386_32:
- return visitELF_386_32(R, Value);
- case llvm::ELF::R_386_PC32:
- return visitELF_386_PC32(R, Value, SecAddr);
+ }
+ case Triple::aarch64:
+ switch (RelocType) {
+ case llvm::ELF::R_AARCH64_ABS32:
+ return visitELF_AARCH64_ABS32(R, Value);
+ case llvm::ELF::R_AARCH64_ABS64:
+ return visitELF_AARCH64_ABS64(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::mips64el:
+ case Triple::mips64:
+ switch (RelocType) {
+ case llvm::ELF::R_MIPS_32:
+ return visitELF_MIPS64_32(R, Value);
+ case llvm::ELF::R_MIPS_64:
+ return visitELF_MIPS64_64(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::ppc64le:
+ case Triple::ppc64:
+ switch (RelocType) {
+ case llvm::ELF::R_PPC64_ADDR32:
+ return visitELF_PPC64_ADDR32(R, Value);
+ case llvm::ELF::R_PPC64_ADDR64:
+ return visitELF_PPC64_ADDR64(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::systemz:
+ switch (RelocType) {
+ case llvm::ELF::R_390_32:
+ return visitELF_390_32(R, Value);
+ case llvm::ELF::R_390_64:
+ return visitELF_390_64(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::sparcv9:
+ switch (RelocType) {
+ case llvm::ELF::R_SPARC_32:
+ case llvm::ELF::R_SPARC_UA32:
+ return visitELF_SPARCV9_32(R, Value);
+ case llvm::ELF::R_SPARC_64:
+ case llvm::ELF::R_SPARC_UA64:
+ return visitELF_SPARCV9_64(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
default:
HasError = true;
return RelocToApply();
}
- } else if (FileFormat == "ELF64-ppc64") {
- switch (RelocType) {
- case llvm::ELF::R_PPC64_ADDR32:
- return visitELF_PPC64_ADDR32(R, Value);
+ } else if (ObjToVisit.getBytesInAddress() == 4) { // 32-bit object file
+ switch (ObjToVisit.getArch()) {
+ case Triple::x86:
+ switch (RelocType) {
+ case llvm::ELF::R_386_NONE:
+ return visitELF_386_NONE(R);
+ case llvm::ELF::R_386_32:
+ return visitELF_386_32(R, Value);
+ case llvm::ELF::R_386_PC32:
+ return visitELF_386_PC32(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::ppc:
+ switch (RelocType) {
+ case llvm::ELF::R_PPC_ADDR32:
+ return visitELF_PPC_ADDR32(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::arm:
+ case Triple::armeb:
+ switch (RelocType) {
+ default:
+ HasError = true;
+ return RelocToApply();
+ case llvm::ELF::R_ARM_ABS32:
+ return visitELF_ARM_ABS32(R, Value);
+ }
+ case Triple::mipsel:
+ case Triple::mips:
+ switch (RelocType) {
+ case llvm::ELF::R_MIPS_32:
+ return visitELF_MIPS_32(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::sparc:
+ switch (RelocType) {
+ case llvm::ELF::R_SPARC_32:
+ case llvm::ELF::R_SPARC_UA32:
+ return visitELF_SPARC_32(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
default:
HasError = true;
return RelocToApply();
}
- } else if (FileFormat == "ELF32-mips") {
+ } else {
+ report_fatal_error("Invalid word size in object file");
+ }
+ }
+
+ RelocToApply visitCOFF(uint32_t RelocType, RelocationRef R, uint64_t Value) {
+ switch (ObjToVisit.getArch()) {
+ case Triple::x86:
switch (RelocType) {
- case llvm::ELF::R_MIPS_32:
- return visitELF_MIPS_32(R, Value);
- default:
- HasError = true;
- return RelocToApply();
+ case COFF::IMAGE_REL_I386_SECREL:
+ return visitCOFF_I386_SECREL(R, Value);
+ case COFF::IMAGE_REL_I386_DIR32:
+ return visitCOFF_I386_DIR32(R, Value);
}
+ break;
+ case Triple::x86_64:
+ switch (RelocType) {
+ case COFF::IMAGE_REL_AMD64_SECREL:
+ return visitCOFF_AMD64_SECREL(R, Value);
+ case COFF::IMAGE_REL_AMD64_ADDR64:
+ return visitCOFF_AMD64_ADDR64(R, Value);
+ }
+ break;
}
HasError = true;
return RelocToApply();
}
- bool error() { return HasError; }
+ RelocToApply visitMachO(uint32_t RelocType, RelocationRef R, uint64_t Value) {
+ switch (ObjToVisit.getArch()) {
+ default: break;
+ case Triple::x86_64:
+ switch (RelocType) {
+ default: break;
+ case MachO::X86_64_RELOC_UNSIGNED:
+ return visitMACHO_X86_64_UNSIGNED(R, Value);
+ }
+ }
+ HasError = true;
+ return RelocToApply();
+ }
-private:
- StringRef FileFormat;
- bool HasError;
+ int64_t getELFAddend(RelocationRef R) {
+ ErrorOr<int64_t> AddendOrErr = ELFRelocationRef(R).getAddend();
+ if (std::error_code EC = AddendOrErr.getError())
+ report_fatal_error(EC.message());
+ return *AddendOrErr;
+ }
+
+ uint8_t getLengthMachO64(RelocationRef R) {
+ const MachOObjectFile *Obj = cast<MachOObjectFile>(R.getObject());
+ return Obj->getRelocationLength(R.getRawDataRefImpl());
+ }
/// Operations
// Ideally the Addend here will be the addend in the data for
// the relocation. It's not actually the case for Rel relocations.
RelocToApply visitELF_386_32(RelocationRef R, uint64_t Value) {
- int64_t Addend;
- R.getAdditionalInfo(Addend);
- return RelocToApply(Value + Addend, 4);
+ return RelocToApply(Value, 4);
}
- RelocToApply visitELF_386_PC32(RelocationRef R, uint64_t Value,
- uint64_t SecAddr) {
- int64_t Addend;
- R.getAdditionalInfo(Addend);
- uint64_t Address;
- R.getAddress(Address);
- return RelocToApply(Value + Addend - Address, 4);
+ RelocToApply visitELF_386_PC32(RelocationRef R, uint64_t Value) {
+ uint64_t Address = R.getOffset();
+ return RelocToApply(Value - Address, 4);
}
/// X86-64 ELF
return RelocToApply(0, 0);
}
RelocToApply visitELF_X86_64_64(RelocationRef R, uint64_t Value) {
- int64_t Addend;
- R.getAdditionalInfo(Addend);
+ int64_t Addend = getELFAddend(R);
return RelocToApply(Value + Addend, 8);
}
- RelocToApply visitELF_X86_64_PC32(RelocationRef R, uint64_t Value,
- uint64_t SecAddr) {
- int64_t Addend;
- R.getAdditionalInfo(Addend);
- uint64_t Address;
- R.getAddress(Address);
+ RelocToApply visitELF_X86_64_PC32(RelocationRef R, uint64_t Value) {
+ int64_t Addend = getELFAddend(R);
+ uint64_t Address = R.getOffset();
return RelocToApply(Value + Addend - Address, 4);
}
RelocToApply visitELF_X86_64_32(RelocationRef R, uint64_t Value) {
- int64_t Addend;
- R.getAdditionalInfo(Addend);
+ int64_t Addend = getELFAddend(R);
uint32_t Res = (Value + Addend) & 0xFFFFFFFF;
return RelocToApply(Res, 4);
}
RelocToApply visitELF_X86_64_32S(RelocationRef R, uint64_t Value) {
- int64_t Addend;
- R.getAdditionalInfo(Addend);
+ int64_t Addend = getELFAddend(R);
int32_t Res = (Value + Addend) & 0xFFFFFFFF;
return RelocToApply(Res, 4);
}
/// PPC64 ELF
RelocToApply visitELF_PPC64_ADDR32(RelocationRef R, uint64_t Value) {
- int64_t Addend;
- R.getAdditionalInfo(Addend);
+ int64_t Addend = getELFAddend(R);
+ uint32_t Res = (Value + Addend) & 0xFFFFFFFF;
+ return RelocToApply(Res, 4);
+ }
+ RelocToApply visitELF_PPC64_ADDR64(RelocationRef R, uint64_t Value) {
+ int64_t Addend = getELFAddend(R);
+ return RelocToApply(Value + Addend, 8);
+ }
+
+ /// PPC32 ELF
+ RelocToApply visitELF_PPC_ADDR32(RelocationRef R, uint64_t Value) {
+ int64_t Addend = getELFAddend(R);
uint32_t Res = (Value + Addend) & 0xFFFFFFFF;
return RelocToApply(Res, 4);
}
/// MIPS ELF
RelocToApply visitELF_MIPS_32(RelocationRef R, uint64_t Value) {
- int64_t Addend;
- R.getAdditionalInfo(Addend);
+ uint32_t Res = Value & 0xFFFFFFFF;
+ return RelocToApply(Res, 4);
+ }
+
+ /// MIPS64 ELF
+ RelocToApply visitELF_MIPS64_32(RelocationRef R, uint64_t Value) {
+ int64_t Addend = getELFAddend(R);
uint32_t Res = (Value + Addend) & 0xFFFFFFFF;
return RelocToApply(Res, 4);
}
+
+ RelocToApply visitELF_MIPS64_64(RelocationRef R, uint64_t Value) {
+ int64_t Addend = getELFAddend(R);
+ uint64_t Res = (Value + Addend);
+ return RelocToApply(Res, 8);
+ }
+
+ // AArch64 ELF
+ RelocToApply visitELF_AARCH64_ABS32(RelocationRef R, uint64_t Value) {
+ int64_t Addend = getELFAddend(R);
+ int64_t Res = Value + Addend;
+
+ // Overflow check allows for both signed and unsigned interpretation.
+ if (Res < INT32_MIN || Res > UINT32_MAX)
+ HasError = true;
+
+ return RelocToApply(static_cast<uint32_t>(Res), 4);
+ }
+
+ RelocToApply visitELF_AARCH64_ABS64(RelocationRef R, uint64_t Value) {
+ int64_t Addend = getELFAddend(R);
+ return RelocToApply(Value + Addend, 8);
+ }
+
+ // SystemZ ELF
+ RelocToApply visitELF_390_32(RelocationRef R, uint64_t Value) {
+ int64_t Addend = getELFAddend(R);
+ int64_t Res = Value + Addend;
+
+ // Overflow check allows for both signed and unsigned interpretation.
+ if (Res < INT32_MIN || Res > UINT32_MAX)
+ HasError = true;
+
+ return RelocToApply(static_cast<uint32_t>(Res), 4);
+ }
+
+ RelocToApply visitELF_390_64(RelocationRef R, uint64_t Value) {
+ int64_t Addend = getELFAddend(R);
+ return RelocToApply(Value + Addend, 8);
+ }
+
+ RelocToApply visitELF_SPARC_32(RelocationRef R, uint32_t Value) {
+ int32_t Addend = getELFAddend(R);
+ return RelocToApply(Value + Addend, 4);
+ }
+
+ RelocToApply visitELF_SPARCV9_32(RelocationRef R, uint64_t Value) {
+ int32_t Addend = getELFAddend(R);
+ return RelocToApply(Value + Addend, 4);
+ }
+
+ RelocToApply visitELF_SPARCV9_64(RelocationRef R, uint64_t Value) {
+ int64_t Addend = getELFAddend(R);
+ return RelocToApply(Value + Addend, 8);
+ }
+
+ RelocToApply visitELF_ARM_ABS32(RelocationRef R, uint64_t Value) {
+ int64_t Res = Value;
+
+ // Overflow check allows for both signed and unsigned interpretation.
+ if (Res < INT32_MIN || Res > UINT32_MAX)
+ HasError = true;
+
+ return RelocToApply(static_cast<uint32_t>(Res), 4);
+ }
+
+ /// I386 COFF
+ RelocToApply visitCOFF_I386_SECREL(RelocationRef R, uint64_t Value) {
+ return RelocToApply(static_cast<uint32_t>(Value), /*Width=*/4);
+ }
+
+ RelocToApply visitCOFF_I386_DIR32(RelocationRef R, uint64_t Value) {
+ return RelocToApply(static_cast<uint32_t>(Value), /*Width=*/4);
+ }
+
+ /// AMD64 COFF
+ RelocToApply visitCOFF_AMD64_SECREL(RelocationRef R, uint64_t Value) {
+ return RelocToApply(static_cast<uint32_t>(Value), /*Width=*/4);
+ }
+
+ RelocToApply visitCOFF_AMD64_ADDR64(RelocationRef R, uint64_t Value) {
+ return RelocToApply(Value, /*Width=*/8);
+ }
+
+ // X86_64 MachO
+ RelocToApply visitMACHO_X86_64_UNSIGNED(RelocationRef R, uint64_t Value) {
+ uint8_t Length = getLengthMachO64(R);
+ Length = 1<<Length;
+ return RelocToApply(Value, Length);
+ }
};
}