//===----------------------------------------------------------------------===//
#include "llvm-objdump.h"
+#include "llvm/ADT/Optional.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Triple.h"
+#include "llvm/CodeGen/FaultMaps.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler.h"
llvm::PrintImmHex("print-imm-hex",
cl::desc("Use hex format for immediate values"));
+cl::opt<bool> PrintFaultMaps("fault-map-section",
+ cl::desc("Display contents of faultmap section"));
+
static StringRef ToolName;
static int ReturnValue = EXIT_SUCCESS;
}
bool llvm::RelocAddressLess(RelocationRef a, RelocationRef b) {
- uint64_t a_addr, b_addr;
- if (error(a.getOffset(a_addr))) return false;
- if (error(b.getOffset(b_addr))) return false;
- return a_addr < b_addr;
+ return a.getOffset() < b.getOffset();
}
namespace {
}
}
-template <class ELFT>
-static const typename ELFObjectFile<ELFT>::Elf_Rel *
-getRel(const ELFFile<ELFT> &EF, DataRefImpl Rel) {
- typedef typename ELFObjectFile<ELFT>::Elf_Rel Elf_Rel;
- return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
-}
-
-template <class ELFT>
-static const typename ELFObjectFile<ELFT>::Elf_Rela *
-getRela(const ELFFile<ELFT> &EF, DataRefImpl Rela) {
- typedef typename ELFObjectFile<ELFT>::Elf_Rela Elf_Rela;
- return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
-}
-
template <class ELFT>
static std::error_code getRelocationValueString(const ELFObjectFile<ELFT> *Obj,
DataRefImpl Rel,
SmallVectorImpl<char> &Result) {
typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
typedef typename ELFObjectFile<ELFT>::Elf_Shdr Elf_Shdr;
+ typedef typename ELFObjectFile<ELFT>::Elf_Rel Elf_Rel;
+ typedef typename ELFObjectFile<ELFT>::Elf_Rela Elf_Rela;
+
const ELFFile<ELFT> &EF = *Obj->getELFFile();
- const Elf_Shdr *sec = EF.getSection(Rel.d.a);
+ ErrorOr<const Elf_Shdr *> SecOrErr = EF.getSection(Rel.d.a);
+ if (std::error_code EC = SecOrErr.getError())
+ return EC;
+ const Elf_Shdr *Sec = *SecOrErr;
+ ErrorOr<const Elf_Shdr *> SymTabOrErr = EF.getSection(Sec->sh_link);
+ if (std::error_code EC = SymTabOrErr.getError())
+ return EC;
+ const Elf_Shdr *SymTab = *SymTabOrErr;
+ assert(SymTab->sh_type == ELF::SHT_SYMTAB ||
+ SymTab->sh_type == ELF::SHT_DYNSYM);
+ ErrorOr<const Elf_Shdr *> StrTabSec = EF.getSection(SymTab->sh_link);
+ if (std::error_code EC = StrTabSec.getError())
+ return EC;
+ ErrorOr<StringRef> StrTabOrErr = EF.getStringTable(*StrTabSec);
+ if (std::error_code EC = StrTabOrErr.getError())
+ return EC;
+ StringRef StrTab = *StrTabOrErr;
uint8_t type;
StringRef res;
int64_t addend = 0;
uint16_t symbol_index = 0;
- switch (sec->sh_type) {
+ switch (Sec->sh_type) {
default:
return object_error::parse_failed;
case ELF::SHT_REL: {
- type = getRel(EF, Rel)->getType(EF.isMips64EL());
- symbol_index = getRel(EF, Rel)->getSymbol(EF.isMips64EL());
+ const Elf_Rel *ERel = Obj->getRel(Rel);
+ type = ERel->getType(EF.isMips64EL());
+ symbol_index = ERel->getSymbol(EF.isMips64EL());
// TODO: Read implicit addend from section data.
break;
}
case ELF::SHT_RELA: {
- type = getRela(EF, Rel)->getType(EF.isMips64EL());
- symbol_index = getRela(EF, Rel)->getSymbol(EF.isMips64EL());
- addend = getRela(EF, Rel)->r_addend;
+ const Elf_Rela *ERela = Obj->getRela(Rel);
+ type = ERela->getType(EF.isMips64EL());
+ symbol_index = ERela->getSymbol(EF.isMips64EL());
+ addend = ERela->r_addend;
break;
}
}
const Elf_Sym *symb =
- EF.template getEntry<Elf_Sym>(sec->sh_link, symbol_index);
+ EF.template getEntry<Elf_Sym>(Sec->sh_link, symbol_index);
StringRef Target;
- const Elf_Shdr *SymSec = EF.getSection(symb);
+ ErrorOr<const Elf_Shdr *> SymSec = EF.getSection(symb);
+ if (std::error_code EC = SymSec.getError())
+ return EC;
if (symb->getType() == ELF::STT_SECTION) {
- ErrorOr<StringRef> SecName = EF.getSectionName(SymSec);
+ ErrorOr<StringRef> SecName = EF.getSectionName(*SymSec);
if (std::error_code EC = SecName.getError())
return EC;
Target = *SecName;
} else {
- ErrorOr<StringRef> SymName =
- EF.getSymbolName(EF.getSection(sec->sh_link), symb);
+ ErrorOr<StringRef> SymName = symb->getName(StrTab);
if (!SymName)
return SymName.getError();
Target = *SymName;
const RelocationRef &Rel,
SmallVectorImpl<char> &Result) {
symbol_iterator SymI = Rel.getSymbol();
- StringRef SymName;
- if (std::error_code EC = SymI->getName(SymName))
+ ErrorOr<StringRef> SymNameOrErr = SymI->getName();
+ if (std::error_code EC = SymNameOrErr.getError())
return EC;
+ StringRef SymName = *SymNameOrErr;
Result.append(SymName.begin(), SymName.end());
return std::error_code();
}
for (const SymbolRef &Symbol : O->symbols()) {
std::error_code ec;
- uint64_t Addr;
- StringRef Name;
-
- if ((ec = Symbol.getAddress(Addr)))
+ ErrorOr<uint64_t> Addr = Symbol.getAddress();
+ if ((ec = Addr.getError()))
report_fatal_error(ec.message());
- if (Addr != Val)
+ if (*Addr != Val)
continue;
- if ((ec = Symbol.getName(Name)))
- report_fatal_error(ec.message());
- fmt << Name;
+ ErrorOr<StringRef> Name = Symbol.getName();
+ if (std::error_code EC = Name.getError())
+ report_fatal_error(EC.message());
+ fmt << *Name;
return;
}
if (isExtern) {
symbol_iterator SI = O->symbol_begin();
advance(SI, Val);
- SI->getName(S);
+ ErrorOr<StringRef> SOrErr = SI->getName();
+ if (!error(SOrErr.getError()))
+ S = *SOrErr;
} else {
section_iterator SI = O->section_begin();
// Adjust for the fact that sections are 1-indexed.
static std::error_code getRelocationValueString(const RelocationRef &Rel,
SmallVectorImpl<char> &Result) {
- const ObjectFile *Obj = Rel.getObjectFile();
+ const ObjectFile *Obj = Rel.getObject();
if (auto *ELF = dyn_cast<ELFObjectFileBase>(Obj))
return getRelocationValueString(ELF, Rel, Result);
if (auto *COFF = dyn_cast<COFFObjectFile>(Obj))
return getRelocationValueString(MachO, Rel, Result);
}
+/// @brief Indicates whether this relocation should hidden when listing
+/// relocations, usually because it is the trailing part of a multipart
+/// relocation that will be printed as part of the leading relocation.
+static bool getHidden(RelocationRef RelRef) {
+ const ObjectFile *Obj = RelRef.getObject();
+ auto *MachO = dyn_cast<MachOObjectFile>(Obj);
+ if (!MachO)
+ return false;
+
+ unsigned Arch = MachO->getArch();
+ DataRefImpl Rel = RelRef.getRawDataRefImpl();
+ uint64_t Type = MachO->getRelocationType(Rel);
+
+ // On arches that use the generic relocations, GENERIC_RELOC_PAIR
+ // is always hidden.
+ if (Arch == Triple::x86 || Arch == Triple::arm || Arch == Triple::ppc) {
+ if (Type == MachO::GENERIC_RELOC_PAIR)
+ return true;
+ } else if (Arch == Triple::x86_64) {
+ // On x86_64, X86_64_RELOC_UNSIGNED is hidden only when it follows
+ // an X86_64_RELOC_SUBTRACTOR.
+ if (Type == MachO::X86_64_RELOC_UNSIGNED && Rel.d.a > 0) {
+ DataRefImpl RelPrev = Rel;
+ RelPrev.d.a--;
+ uint64_t PrevType = MachO->getRelocationType(RelPrev);
+ if (PrevType == MachO::X86_64_RELOC_SUBTRACTOR)
+ return true;
+ }
+ }
+
+ return false;
+}
+
static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
const Target *TheTarget = getTarget(Obj);
// getTarget() will have already issued a diagnostic if necessary, so
std::vector<std::pair<uint64_t, StringRef>> Symbols;
for (const SymbolRef &Symbol : Obj->symbols()) {
if (Section.containsSymbol(Symbol)) {
- uint64_t Address;
- if (error(Symbol.getAddress(Address)))
+ ErrorOr<uint64_t> AddressOrErr = Symbol.getAddress();
+ if (error(AddressOrErr.getError()))
break;
- if (Address == UnknownAddressOrSize)
+ uint64_t Address = *AddressOrErr;
+ if (Address == UnknownAddress)
continue;
Address -= SectionAddr;
if (Address >= SectSize)
continue;
- StringRef Name;
- if (error(Symbol.getName(Name)))
+ ErrorOr<StringRef> Name = Symbol.getName();
+ if (error(Name.getError()))
break;
- Symbols.push_back(std::make_pair(Address, Name));
+ Symbols.push_back(std::make_pair(Address, *Name));
}
}
// Print relocation for instruction.
while (rel_cur != rel_end) {
- bool hidden = false;
- uint64_t addr;
+ bool hidden = getHidden(*rel_cur);
+ uint64_t addr = rel_cur->getOffset();
SmallString<16> name;
SmallString<32> val;
// If this relocation is hidden, skip it.
- if (error(rel_cur->getHidden(hidden))) goto skip_print_rel;
if (hidden) goto skip_print_rel;
- if (error(rel_cur->getOffset(addr))) goto skip_print_rel;
// Stop when rel_cur's address is past the current instruction.
if (addr >= Index + Size) break;
- if (error(rel_cur->getTypeName(name))) goto skip_print_rel;
+ rel_cur->getTypeName(name);
if (error(getRelocationValueString(*rel_cur, val)))
goto skip_print_rel;
outs() << format(Fmt.data(), SectionAddr + addr) << name
continue;
outs() << "RELOCATION RECORDS FOR [" << secname << "]:\n";
for (const RelocationRef &Reloc : Section.relocations()) {
- bool hidden;
- uint64_t address;
+ bool hidden = getHidden(Reloc);
+ uint64_t address = Reloc.getOffset();
SmallString<32> relocname;
SmallString<32> valuestr;
- if (error(Reloc.getHidden(hidden)))
- continue;
if (hidden)
continue;
- if (error(Reloc.getTypeName(relocname)))
- continue;
- if (error(Reloc.getOffset(address)))
- continue;
+ Reloc.getTypeName(relocname);
if (error(getRelocationValueString(Reloc, valuestr)))
continue;
outs() << format(Fmt.data(), address) << " " << relocname << " "
return;
}
for (const SymbolRef &Symbol : o->symbols()) {
- uint64_t Address;
- SymbolRef::Type Type;
+ ErrorOr<uint64_t> AddressOrError = Symbol.getAddress();
+ if (error(AddressOrError.getError()))
+ continue;
+ uint64_t Address = *AddressOrError;
+ SymbolRef::Type Type = Symbol.getType();
uint32_t Flags = Symbol.getFlags();
section_iterator Section = o->section_end();
- if (error(Symbol.getAddress(Address)))
- continue;
- if (error(Symbol.getType(Type)))
- continue;
- uint64_t Size = Symbol.getSize();
if (error(Symbol.getSection(Section)))
continue;
StringRef Name;
if (Type == SymbolRef::ST_Debug && Section != o->section_end()) {
Section->getName(Name);
- } else if (error(Symbol.getName(Name))) {
- continue;
+ } else {
+ ErrorOr<StringRef> NameOrErr = Symbol.getName();
+ if (error(NameOrErr.getError()))
+ continue;
+ Name = *NameOrErr;
}
bool Global = Flags & SymbolRef::SF_Global;
bool Common = Flags & SymbolRef::SF_Common;
bool Hidden = Flags & SymbolRef::SF_Hidden;
- if (Common) {
- uint32_t Alignment = Symbol.getAlignment();
- Address = Size;
- Size = Alignment;
- }
- if (Address == UnknownAddressOrSize)
+ if (Common)
+ Address = Symbol.getCommonSize();
+
+ if (Address == UnknownAddress)
Address = 0;
- if (Size == UnknownAddressOrSize)
- Size = 0;
char GlobLoc = ' ';
if (Type != SymbolRef::ST_Unknown)
GlobLoc = Global ? 'g' : 'l';
SectionName = "";
outs() << SectionName;
}
- outs() << '\t'
- << format("%08" PRIx64 " ", Size);
+
+ outs() << '\t';
+ if (Common || isa<ELFObjectFileBase>(o)) {
+ uint64_t Val =
+ Common ? Symbol.getAlignment() : ELFSymbolRef(Symbol).getSize();
+ outs() << format("\t %08" PRIx64 " ", Val);
+ }
+
if (Hidden) {
outs() << ".hidden ";
}
}
}
+static void printFaultMaps(const ObjectFile *Obj) {
+ const char *FaultMapSectionName = nullptr;
+
+ if (isa<ELFObjectFileBase>(Obj)) {
+ FaultMapSectionName = ".llvm_faultmaps";
+ } else if (isa<MachOObjectFile>(Obj)) {
+ FaultMapSectionName = "__llvm_faultmaps";
+ } else {
+ errs() << "This operation is only currently supported "
+ "for ELF and Mach-O executable files.\n";
+ return;
+ }
+
+ Optional<object::SectionRef> FaultMapSection;
+
+ for (auto Sec : Obj->sections()) {
+ StringRef Name;
+ Sec.getName(Name);
+ if (Name == FaultMapSectionName) {
+ FaultMapSection = Sec;
+ break;
+ }
+ }
+
+ outs() << "FaultMap table:\n";
+
+ if (!FaultMapSection.hasValue()) {
+ outs() << "<not found>\n";
+ return;
+ }
+
+ StringRef FaultMapContents;
+ if (error(FaultMapSection.getValue().getContents(FaultMapContents))) {
+ errs() << "Could not read the " << FaultMapContents << " section!\n";
+ return;
+ }
+
+ FaultMapParser FMP(FaultMapContents.bytes_begin(),
+ FaultMapContents.bytes_end());
+
+ outs() << FMP;
+}
+
static void printPrivateFileHeader(const ObjectFile *o) {
if (o->isELF()) {
printELFFileHeader(o);
printLazyBindTable(o);
if (WeakBind)
printWeakBindTable(o);
+ if (PrintFaultMaps)
+ printFaultMaps(o);
}
/// @brief Dump each object file in \a a;
&& !(DylibsUsed && MachOOpt)
&& !(DylibId && MachOOpt)
&& !(ObjcMetaData && MachOOpt)
- && !(DumpSections.size() != 0 && MachOOpt)) {
+ && !(DumpSections.size() != 0 && MachOOpt)
+ && !PrintFaultMaps) {
cl::PrintHelpMessage();
return 2;
}
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