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llvm-project/lld/lib/ReaderWriter/MachO/MachONormalizedFileYAML.cpp

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//===- lib/ReaderWriter/MachO/MachONormalizedFileYAML.cpp -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file For mach-o object files, this implementation uses YAML I/O to
/// provide the convert between YAML and the normalized mach-o (NM).
///
/// +------------+ +------+
/// | normalized | <-> | yaml |
/// +------------+ +------+
#include "MachONormalizedFile.h"
#include "lld/Common/LLVM.h"
#include "lld/Core/Error.h"
#include "lld/ReaderWriter/YamlContext.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Twine.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/YAMLTraits.h"
#include "llvm/Support/raw_ostream.h"
#include <system_error>
using llvm::StringRef;
using namespace llvm::yaml;
using namespace llvm::MachO;
using namespace lld::mach_o::normalized;
using lld::YamlContext;
LLVM_YAML_IS_SEQUENCE_VECTOR(Segment)
LLVM_YAML_IS_SEQUENCE_VECTOR(DependentDylib)
LLVM_YAML_IS_SEQUENCE_VECTOR(RebaseLocation)
LLVM_YAML_IS_SEQUENCE_VECTOR(BindLocation)
LLVM_YAML_IS_SEQUENCE_VECTOR(Export)
LLVM_YAML_IS_SEQUENCE_VECTOR(DataInCode)
// for compatibility with gcc-4.7 in C++11 mode, add extra namespace
namespace llvm {
namespace yaml {
// A vector of Sections is a sequence.
template<>
struct SequenceTraits< std::vector<Section> > {
static size_t size(IO &io, std::vector<Section> &seq) {
return seq.size();
}
static Section& element(IO &io, std::vector<Section> &seq, size_t index) {
if ( index >= seq.size() )
seq.resize(index+1);
return seq[index];
}
};
template<>
struct SequenceTraits< std::vector<Symbol> > {
static size_t size(IO &io, std::vector<Symbol> &seq) {
return seq.size();
}
static Symbol& element(IO &io, std::vector<Symbol> &seq, size_t index) {
if ( index >= seq.size() )
seq.resize(index+1);
return seq[index];
}
};
// A vector of Relocations is a sequence.
template<>
struct SequenceTraits< Relocations > {
static size_t size(IO &io, Relocations &seq) {
return seq.size();
}
static Relocation& element(IO &io, Relocations &seq, size_t index) {
if ( index >= seq.size() )
seq.resize(index+1);
return seq[index];
}
};
// The content for a section is represented as a flow sequence of hex bytes.
template<>
struct SequenceTraits< ContentBytes > {
static size_t size(IO &io, ContentBytes &seq) {
return seq.size();
}
static Hex8& element(IO &io, ContentBytes &seq, size_t index) {
if ( index >= seq.size() )
seq.resize(index+1);
return seq[index];
}
static const bool flow = true;
};
// The indirect symbols for a section is represented as a flow sequence
// of numbers (symbol table indexes).
template<>
struct SequenceTraits< IndirectSymbols > {
static size_t size(IO &io, IndirectSymbols &seq) {
return seq.size();
}
static uint32_t& element(IO &io, IndirectSymbols &seq, size_t index) {
if ( index >= seq.size() )
seq.resize(index+1);
return seq[index];
}
static const bool flow = true;
};
template <>
struct ScalarEnumerationTraits<lld::MachOLinkingContext::Arch> {
static void enumeration(IO &io, lld::MachOLinkingContext::Arch &value) {
io.enumCase(value, "unknown",lld::MachOLinkingContext::arch_unknown);
io.enumCase(value, "ppc", lld::MachOLinkingContext::arch_ppc);
io.enumCase(value, "x86", lld::MachOLinkingContext::arch_x86);
io.enumCase(value, "x86_64", lld::MachOLinkingContext::arch_x86_64);
io.enumCase(value, "armv6", lld::MachOLinkingContext::arch_armv6);
io.enumCase(value, "armv7", lld::MachOLinkingContext::arch_armv7);
io.enumCase(value, "armv7s", lld::MachOLinkingContext::arch_armv7s);
io.enumCase(value, "arm64", lld::MachOLinkingContext::arch_arm64);
}
};
template <>
struct ScalarEnumerationTraits<lld::MachOLinkingContext::OS> {
static void enumeration(IO &io, lld::MachOLinkingContext::OS &value) {
io.enumCase(value, "unknown",
lld::MachOLinkingContext::OS::unknown);
io.enumCase(value, "Mac OS X",
lld::MachOLinkingContext::OS::macOSX);
io.enumCase(value, "iOS",
lld::MachOLinkingContext::OS::iOS);
io.enumCase(value, "iOS Simulator",
lld::MachOLinkingContext::OS::iOS_simulator);
}
};
template <>
struct ScalarEnumerationTraits<HeaderFileType> {
static void enumeration(IO &io, HeaderFileType &value) {
io.enumCase(value, "MH_OBJECT", llvm::MachO::MH_OBJECT);
io.enumCase(value, "MH_DYLIB", llvm::MachO::MH_DYLIB);
io.enumCase(value, "MH_EXECUTE", llvm::MachO::MH_EXECUTE);
io.enumCase(value, "MH_BUNDLE", llvm::MachO::MH_BUNDLE);
}
};
template <>
struct ScalarBitSetTraits<FileFlags> {
static void bitset(IO &io, FileFlags &value) {
io.bitSetCase(value, "MH_TWOLEVEL",
llvm::MachO::MH_TWOLEVEL);
io.bitSetCase(value, "MH_SUBSECTIONS_VIA_SYMBOLS",
llvm::MachO::MH_SUBSECTIONS_VIA_SYMBOLS);
}
};
template <>
struct ScalarEnumerationTraits<SectionType> {
static void enumeration(IO &io, SectionType &value) {
io.enumCase(value, "S_REGULAR",
llvm::MachO::S_REGULAR);
io.enumCase(value, "S_ZEROFILL",
llvm::MachO::S_ZEROFILL);
io.enumCase(value, "S_CSTRING_LITERALS",
llvm::MachO::S_CSTRING_LITERALS);
io.enumCase(value, "S_4BYTE_LITERALS",
llvm::MachO::S_4BYTE_LITERALS);
io.enumCase(value, "S_8BYTE_LITERALS",
llvm::MachO::S_8BYTE_LITERALS);
io.enumCase(value, "S_LITERAL_POINTERS",
llvm::MachO::S_LITERAL_POINTERS);
io.enumCase(value, "S_NON_LAZY_SYMBOL_POINTERS",
llvm::MachO::S_NON_LAZY_SYMBOL_POINTERS);
io.enumCase(value, "S_LAZY_SYMBOL_POINTERS",
llvm::MachO::S_LAZY_SYMBOL_POINTERS);
io.enumCase(value, "S_SYMBOL_STUBS",
llvm::MachO::S_SYMBOL_STUBS);
io.enumCase(value, "S_MOD_INIT_FUNC_POINTERS",
llvm::MachO::S_MOD_INIT_FUNC_POINTERS);
io.enumCase(value, "S_MOD_TERM_FUNC_POINTERS",
llvm::MachO::S_MOD_TERM_FUNC_POINTERS);
io.enumCase(value, "S_COALESCED",
llvm::MachO::S_COALESCED);
io.enumCase(value, "S_GB_ZEROFILL",
llvm::MachO::S_GB_ZEROFILL);
io.enumCase(value, "S_INTERPOSING",
llvm::MachO::S_INTERPOSING);
io.enumCase(value, "S_16BYTE_LITERALS",
llvm::MachO::S_16BYTE_LITERALS);
io.enumCase(value, "S_DTRACE_DOF",
llvm::MachO::S_DTRACE_DOF);
io.enumCase(value, "S_LAZY_DYLIB_SYMBOL_POINTERS",
llvm::MachO::S_LAZY_DYLIB_SYMBOL_POINTERS);
io.enumCase(value, "S_THREAD_LOCAL_REGULAR",
llvm::MachO::S_THREAD_LOCAL_REGULAR);
io.enumCase(value, "S_THREAD_LOCAL_ZEROFILL",
llvm::MachO::S_THREAD_LOCAL_ZEROFILL);
io.enumCase(value, "S_THREAD_LOCAL_VARIABLES",
llvm::MachO::S_THREAD_LOCAL_VARIABLES);
io.enumCase(value, "S_THREAD_LOCAL_VARIABLE_POINTERS",
llvm::MachO::S_THREAD_LOCAL_VARIABLE_POINTERS);
io.enumCase(value, "S_THREAD_LOCAL_INIT_FUNCTION_POINTERS",
llvm::MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
}
};
template <>
struct ScalarBitSetTraits<SectionAttr> {
static void bitset(IO &io, SectionAttr &value) {
io.bitSetCase(value, "S_ATTR_PURE_INSTRUCTIONS",
llvm::MachO::S_ATTR_PURE_INSTRUCTIONS);
io.bitSetCase(value, "S_ATTR_SOME_INSTRUCTIONS",
llvm::MachO::S_ATTR_SOME_INSTRUCTIONS);
io.bitSetCase(value, "S_ATTR_NO_DEAD_STRIP",
llvm::MachO::S_ATTR_NO_DEAD_STRIP);
io.bitSetCase(value, "S_ATTR_EXT_RELOC",
llvm::MachO::S_ATTR_EXT_RELOC);
io.bitSetCase(value, "S_ATTR_LOC_RELOC",
llvm::MachO::S_ATTR_LOC_RELOC);
io.bitSetCase(value, "S_ATTR_DEBUG",
llvm::MachO::S_ATTR_DEBUG);
}
};
/// This is a custom formatter for SectionAlignment. Values are
/// the power to raise by, ie, the n in 2^n.
template <> struct ScalarTraits<SectionAlignment> {
static void output(const SectionAlignment &value, void *ctxt,
raw_ostream &out) {
out << llvm::format("%d", (uint32_t)value);
}
static StringRef input(StringRef scalar, void *ctxt,
SectionAlignment &value) {
uint32_t alignment;
if (scalar.getAsInteger(0, alignment)) {
return "malformed alignment value";
}
if (!llvm::isPowerOf2_32(alignment))
return "alignment must be a power of 2";
value = alignment;
return StringRef(); // returning empty string means success
}
static QuotingType mustQuote(StringRef) { return QuotingType::None; }
};
template <>
struct ScalarEnumerationTraits<NListType> {
static void enumeration(IO &io, NListType &value) {
io.enumCase(value, "N_UNDF", llvm::MachO::N_UNDF);
io.enumCase(value, "N_ABS", llvm::MachO::N_ABS);
io.enumCase(value, "N_SECT", llvm::MachO::N_SECT);
io.enumCase(value, "N_PBUD", llvm::MachO::N_PBUD);
io.enumCase(value, "N_INDR", llvm::MachO::N_INDR);
}
};
template <>
struct ScalarBitSetTraits<SymbolScope> {
static void bitset(IO &io, SymbolScope &value) {
io.bitSetCase(value, "N_EXT", llvm::MachO::N_EXT);
io.bitSetCase(value, "N_PEXT", llvm::MachO::N_PEXT);
}
};
template <>
struct ScalarBitSetTraits<SymbolDesc> {
static void bitset(IO &io, SymbolDesc &value) {
io.bitSetCase(value, "N_NO_DEAD_STRIP", llvm::MachO::N_NO_DEAD_STRIP);
io.bitSetCase(value, "N_WEAK_REF", llvm::MachO::N_WEAK_REF);
io.bitSetCase(value, "N_WEAK_DEF", llvm::MachO::N_WEAK_DEF);
io.bitSetCase(value, "N_ARM_THUMB_DEF", llvm::MachO::N_ARM_THUMB_DEF);
io.bitSetCase(value, "N_SYMBOL_RESOLVER", llvm::MachO::N_SYMBOL_RESOLVER);
}
};
template <>
struct MappingTraits<Section> {
struct NormalizedContentBytes;
static void mapping(IO &io, Section &sect) {
io.mapRequired("segment", sect.segmentName);
io.mapRequired("section", sect.sectionName);
io.mapRequired("type", sect.type);
io.mapOptional("attributes", sect.attributes);
io.mapOptional("alignment", sect.alignment, (SectionAlignment)1);
io.mapRequired("address", sect.address);
if (isZeroFillSection(sect.type)) {
// S_ZEROFILL sections use "size:" instead of "content:"
uint64_t size = sect.content.size();
io.mapOptional("size", size);
if (!io.outputting()) {
uint8_t *bytes = nullptr;
sect.content = makeArrayRef(bytes, size);
}
} else {
MappingNormalization<NormalizedContent, ArrayRef<uint8_t>> content(
io, sect.content);
io.mapOptional("content", content->_normalizedContent);
}
io.mapOptional("relocations", sect.relocations);
io.mapOptional("indirect-syms", sect.indirectSymbols);
}
struct NormalizedContent {
NormalizedContent(IO &io) : _io(io) {}
NormalizedContent(IO &io, ArrayRef<uint8_t> content) : _io(io) {
// When writing yaml, copy content byte array to Hex8 vector.
for (auto &c : content) {
_normalizedContent.push_back(c);
}
}
ArrayRef<uint8_t> denormalize(IO &io) {
// When reading yaml, allocate byte array owned by NormalizedFile and
// copy Hex8 vector to byte array.
YamlContext *info = reinterpret_cast<YamlContext *>(io.getContext());
assert(info != nullptr);
NormalizedFile *file = info->_normalizeMachOFile;
assert(file != nullptr);
size_t size = _normalizedContent.size();
if (!size)
return None;
uint8_t *bytes = file->ownedAllocations.Allocate<uint8_t>(size);
std::copy(_normalizedContent.begin(), _normalizedContent.end(), bytes);
return makeArrayRef(bytes, size);
}
IO &_io;
ContentBytes _normalizedContent;
};
};
template <>
struct MappingTraits<Relocation> {
static void mapping(IO &io, Relocation &reloc) {
io.mapRequired("offset", reloc.offset);
io.mapOptional("scattered", reloc.scattered, false);
io.mapRequired("type", reloc.type);
io.mapRequired("length", reloc.length);
io.mapRequired("pc-rel", reloc.pcRel);
if ( !reloc.scattered )
io.mapRequired("extern", reloc.isExtern);
if ( reloc.scattered )
io.mapRequired("value", reloc.value);
if ( !reloc.scattered )
io.mapRequired("symbol", reloc.symbol);
}
};
template <>
struct ScalarEnumerationTraits<RelocationInfoType> {
static void enumeration(IO &io, RelocationInfoType &value) {
YamlContext *info = reinterpret_cast<YamlContext *>(io.getContext());
assert(info != nullptr);
NormalizedFile *file = info->_normalizeMachOFile;
assert(file != nullptr);
switch (file->arch) {
case lld::MachOLinkingContext::arch_x86_64:
io.enumCase(value, "X86_64_RELOC_UNSIGNED",
llvm::MachO::X86_64_RELOC_UNSIGNED);
io.enumCase(value, "X86_64_RELOC_SIGNED",
llvm::MachO::X86_64_RELOC_SIGNED);
io.enumCase(value, "X86_64_RELOC_BRANCH",
llvm::MachO::X86_64_RELOC_BRANCH);
io.enumCase(value, "X86_64_RELOC_GOT_LOAD",
llvm::MachO::X86_64_RELOC_GOT_LOAD);
io.enumCase(value, "X86_64_RELOC_GOT",
llvm::MachO::X86_64_RELOC_GOT);
io.enumCase(value, "X86_64_RELOC_SUBTRACTOR",
llvm::MachO::X86_64_RELOC_SUBTRACTOR);
io.enumCase(value, "X86_64_RELOC_SIGNED_1",
llvm::MachO::X86_64_RELOC_SIGNED_1);
io.enumCase(value, "X86_64_RELOC_SIGNED_2",
llvm::MachO::X86_64_RELOC_SIGNED_2);
io.enumCase(value, "X86_64_RELOC_SIGNED_4",
llvm::MachO::X86_64_RELOC_SIGNED_4);
io.enumCase(value, "X86_64_RELOC_TLV",
llvm::MachO::X86_64_RELOC_TLV);
break;
case lld::MachOLinkingContext::arch_x86:
io.enumCase(value, "GENERIC_RELOC_VANILLA",
llvm::MachO::GENERIC_RELOC_VANILLA);
io.enumCase(value, "GENERIC_RELOC_PAIR",
llvm::MachO::GENERIC_RELOC_PAIR);
io.enumCase(value, "GENERIC_RELOC_SECTDIFF",
llvm::MachO::GENERIC_RELOC_SECTDIFF);
io.enumCase(value, "GENERIC_RELOC_LOCAL_SECTDIFF",
llvm::MachO::GENERIC_RELOC_LOCAL_SECTDIFF);
io.enumCase(value, "GENERIC_RELOC_TLV",
llvm::MachO::GENERIC_RELOC_TLV);
break;
case lld::MachOLinkingContext::arch_armv6:
case lld::MachOLinkingContext::arch_armv7:
case lld::MachOLinkingContext::arch_armv7s:
io.enumCase(value, "ARM_RELOC_VANILLA",
llvm::MachO::ARM_RELOC_VANILLA);
io.enumCase(value, "ARM_RELOC_PAIR",
llvm::MachO::ARM_RELOC_PAIR);
io.enumCase(value, "ARM_RELOC_SECTDIFF",
llvm::MachO::ARM_RELOC_SECTDIFF);
io.enumCase(value, "ARM_RELOC_LOCAL_SECTDIFF",
llvm::MachO::ARM_RELOC_LOCAL_SECTDIFF);
io.enumCase(value, "ARM_RELOC_BR24",
llvm::MachO::ARM_RELOC_BR24);
io.enumCase(value, "ARM_THUMB_RELOC_BR22",
llvm::MachO::ARM_THUMB_RELOC_BR22);
io.enumCase(value, "ARM_RELOC_HALF",
llvm::MachO::ARM_RELOC_HALF);
io.enumCase(value, "ARM_RELOC_HALF_SECTDIFF",
llvm::MachO::ARM_RELOC_HALF_SECTDIFF);
break;
case lld::MachOLinkingContext::arch_arm64:
io.enumCase(value, "ARM64_RELOC_UNSIGNED",
llvm::MachO::ARM64_RELOC_UNSIGNED);
io.enumCase(value, "ARM64_RELOC_SUBTRACTOR",
llvm::MachO::ARM64_RELOC_SUBTRACTOR);
io.enumCase(value, "ARM64_RELOC_BRANCH26",
llvm::MachO::ARM64_RELOC_BRANCH26);
io.enumCase(value, "ARM64_RELOC_PAGE21",
llvm::MachO::ARM64_RELOC_PAGE21);
io.enumCase(value, "ARM64_RELOC_PAGEOFF12",
llvm::MachO::ARM64_RELOC_PAGEOFF12);
io.enumCase(value, "ARM64_RELOC_GOT_LOAD_PAGE21",
llvm::MachO::ARM64_RELOC_GOT_LOAD_PAGE21);
io.enumCase(value, "ARM64_RELOC_GOT_LOAD_PAGEOFF12",
llvm::MachO::ARM64_RELOC_GOT_LOAD_PAGEOFF12);
io.enumCase(value, "ARM64_RELOC_POINTER_TO_GOT",
llvm::MachO::ARM64_RELOC_POINTER_TO_GOT);
io.enumCase(value, "ARM64_RELOC_TLVP_LOAD_PAGE21",
llvm::MachO::ARM64_RELOC_TLVP_LOAD_PAGE21);
io.enumCase(value, "ARM64_RELOC_TLVP_LOAD_PAGEOFF12",
llvm::MachO::ARM64_RELOC_TLVP_LOAD_PAGEOFF12);
io.enumCase(value, "ARM64_RELOC_ADDEND",
llvm::MachO::ARM64_RELOC_ADDEND);
break;
default:
llvm_unreachable("unknown architecture");
}
}
};
template <>
struct MappingTraits<Symbol> {
static void mapping(IO &io, Symbol& sym) {
io.mapRequired("name", sym.name);
io.mapRequired("type", sym.type);
io.mapOptional("scope", sym.scope, SymbolScope(0));
io.mapOptional("sect", sym.sect, (uint8_t)0);
if (sym.type == llvm::MachO::N_UNDF) {
// In undef symbols, desc field contains alignment/ordinal info
// which is better represented as a hex vaule.
uint16_t t1 = sym.desc;
Hex16 t2 = t1;
io.mapOptional("desc", t2, Hex16(0));
sym.desc = t2;
} else {
// In defined symbols, desc fit is a set of option bits.
io.mapOptional("desc", sym.desc, SymbolDesc(0));
}
io.mapRequired("value", sym.value);
}
};
// Custom mapping for VMProtect (e.g. "r-x").
template <>
struct ScalarTraits<VMProtect> {
static void output(const VMProtect &value, void*, raw_ostream &out) {
out << ( (value & llvm::MachO::VM_PROT_READ) ? 'r' : '-');
out << ( (value & llvm::MachO::VM_PROT_WRITE) ? 'w' : '-');
out << ( (value & llvm::MachO::VM_PROT_EXECUTE) ? 'x' : '-');
}
static StringRef input(StringRef scalar, void*, VMProtect &value) {
value = 0;
if (scalar.size() != 3)
return "segment access protection must be three chars (e.g. \"r-x\")";
switch (scalar[0]) {
case 'r':
value = llvm::MachO::VM_PROT_READ;
break;
case '-':
break;
default:
return "segment access protection first char must be 'r' or '-'";
}
switch (scalar[1]) {
case 'w':
value = value | llvm::MachO::VM_PROT_WRITE;
break;
case '-':
break;
default:
return "segment access protection second char must be 'w' or '-'";
}
switch (scalar[2]) {
case 'x':
value = value | llvm::MachO::VM_PROT_EXECUTE;
break;
case '-':
break;
default:
return "segment access protection third char must be 'x' or '-'";
}
// Return the empty string on success,
return StringRef();
}
static QuotingType mustQuote(StringRef) { return QuotingType::None; }
};
template <>
struct MappingTraits<Segment> {
static void mapping(IO &io, Segment& seg) {
io.mapRequired("name", seg.name);
io.mapRequired("address", seg.address);
io.mapRequired("size", seg.size);
io.mapRequired("init-access", seg.init_access);
io.mapRequired("max-access", seg.max_access);
}
};
template <>
struct ScalarEnumerationTraits<LoadCommandType> {
static void enumeration(IO &io, LoadCommandType &value) {
io.enumCase(value, "LC_LOAD_DYLIB",
llvm::MachO::LC_LOAD_DYLIB);
io.enumCase(value, "LC_LOAD_WEAK_DYLIB",
llvm::MachO::LC_LOAD_WEAK_DYLIB);
io.enumCase(value, "LC_REEXPORT_DYLIB",
llvm::MachO::LC_REEXPORT_DYLIB);
io.enumCase(value, "LC_LOAD_UPWARD_DYLIB",
llvm::MachO::LC_LOAD_UPWARD_DYLIB);
io.enumCase(value, "LC_LAZY_LOAD_DYLIB",
llvm::MachO::LC_LAZY_LOAD_DYLIB);
io.enumCase(value, "LC_VERSION_MIN_MACOSX",
llvm::MachO::LC_VERSION_MIN_MACOSX);
io.enumCase(value, "LC_VERSION_MIN_IPHONEOS",
llvm::MachO::LC_VERSION_MIN_IPHONEOS);
io.enumCase(value, "LC_VERSION_MIN_TVOS",
llvm::MachO::LC_VERSION_MIN_TVOS);
io.enumCase(value, "LC_VERSION_MIN_WATCHOS",
llvm::MachO::LC_VERSION_MIN_WATCHOS);
}
};
template <>
struct MappingTraits<DependentDylib> {
static void mapping(IO &io, DependentDylib& dylib) {
io.mapRequired("path", dylib.path);
io.mapOptional("kind", dylib.kind,
llvm::MachO::LC_LOAD_DYLIB);
io.mapOptional("compat-version", dylib.compatVersion,
PackedVersion(0x10000));
io.mapOptional("current-version", dylib.currentVersion,
PackedVersion(0x10000));
}
};
template <>
struct ScalarEnumerationTraits<RebaseType> {
static void enumeration(IO &io, RebaseType &value) {
io.enumCase(value, "REBASE_TYPE_POINTER",
llvm::MachO::REBASE_TYPE_POINTER);
io.enumCase(value, "REBASE_TYPE_TEXT_PCREL32",
llvm::MachO::REBASE_TYPE_TEXT_PCREL32);
io.enumCase(value, "REBASE_TYPE_TEXT_ABSOLUTE32",
llvm::MachO::REBASE_TYPE_TEXT_ABSOLUTE32);
}
};
template <>
struct MappingTraits<RebaseLocation> {
static void mapping(IO &io, RebaseLocation& rebase) {
io.mapRequired("segment-index", rebase.segIndex);
io.mapRequired("segment-offset", rebase.segOffset);
io.mapOptional("kind", rebase.kind,
llvm::MachO::REBASE_TYPE_POINTER);
}
};
template <>
struct ScalarEnumerationTraits<BindType> {
static void enumeration(IO &io, BindType &value) {
io.enumCase(value, "BIND_TYPE_POINTER",
llvm::MachO::BIND_TYPE_POINTER);
io.enumCase(value, "BIND_TYPE_TEXT_ABSOLUTE32",
llvm::MachO::BIND_TYPE_TEXT_ABSOLUTE32);
io.enumCase(value, "BIND_TYPE_TEXT_PCREL32",
llvm::MachO::BIND_TYPE_TEXT_PCREL32);
}
};
template <>
struct MappingTraits<BindLocation> {
static void mapping(IO &io, BindLocation &bind) {
io.mapRequired("segment-index", bind.segIndex);
io.mapRequired("segment-offset", bind.segOffset);
io.mapOptional("kind", bind.kind,
llvm::MachO::BIND_TYPE_POINTER);
io.mapOptional("can-be-null", bind.canBeNull, false);
io.mapRequired("ordinal", bind.ordinal);
io.mapRequired("symbol-name", bind.symbolName);
io.mapOptional("addend", bind.addend, Hex64(0));
}
};
template <>
struct ScalarEnumerationTraits<ExportSymbolKind> {
static void enumeration(IO &io, ExportSymbolKind &value) {
io.enumCase(value, "EXPORT_SYMBOL_FLAGS_KIND_REGULAR",
llvm::MachO::EXPORT_SYMBOL_FLAGS_KIND_REGULAR);
io.enumCase(value, "EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL",
llvm::MachO::EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL);
io.enumCase(value, "EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE",
llvm::MachO::EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE);
}
};
template <>
struct ScalarBitSetTraits<ExportFlags> {
static void bitset(IO &io, ExportFlags &value) {
io.bitSetCase(value, "EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION",
llvm::MachO::EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION);
io.bitSetCase(value, "EXPORT_SYMBOL_FLAGS_REEXPORT",
llvm::MachO::EXPORT_SYMBOL_FLAGS_REEXPORT);
io.bitSetCase(value, "EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER",
llvm::MachO::EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER);
}
};
template <>
struct MappingTraits<Export> {
static void mapping(IO &io, Export &exp) {
io.mapRequired("name", exp.name);
io.mapOptional("offset", exp.offset);
io.mapOptional("kind", exp.kind,
llvm::MachO::EXPORT_SYMBOL_FLAGS_KIND_REGULAR);
if (!io.outputting() || exp.flags)
io.mapOptional("flags", exp.flags);
io.mapOptional("other", exp.otherOffset, Hex32(0));
io.mapOptional("other-name", exp.otherName, StringRef());
}
};
template <>
struct ScalarEnumerationTraits<DataRegionType> {
static void enumeration(IO &io, DataRegionType &value) {
io.enumCase(value, "DICE_KIND_DATA",
llvm::MachO::DICE_KIND_DATA);
io.enumCase(value, "DICE_KIND_JUMP_TABLE8",
llvm::MachO::DICE_KIND_JUMP_TABLE8);
io.enumCase(value, "DICE_KIND_JUMP_TABLE16",
llvm::MachO::DICE_KIND_JUMP_TABLE16);
io.enumCase(value, "DICE_KIND_JUMP_TABLE32",
llvm::MachO::DICE_KIND_JUMP_TABLE32);
io.enumCase(value, "DICE_KIND_ABS_JUMP_TABLE32",
llvm::MachO::DICE_KIND_ABS_JUMP_TABLE32);
}
};
template <>
struct MappingTraits<DataInCode> {
static void mapping(IO &io, DataInCode &entry) {
io.mapRequired("offset", entry.offset);
io.mapRequired("length", entry.length);
io.mapRequired("kind", entry.kind);
}
};
template <>
struct ScalarTraits<PackedVersion> {
static void output(const PackedVersion &value, void*, raw_ostream &out) {
out << llvm::format("%d.%d", (value >> 16), (value >> 8) & 0xFF);
if (value & 0xFF) {
out << llvm::format(".%d", (value & 0xFF));
}
}
static StringRef input(StringRef scalar, void*, PackedVersion &result) {
uint32_t value;
if (lld::MachOLinkingContext::parsePackedVersion(scalar, value))
return "malformed version number";
result = value;
// Return the empty string on success,
return StringRef();
}
static QuotingType mustQuote(StringRef) { return QuotingType::None; }
};
template <>
struct MappingTraits<NormalizedFile> {
static void mapping(IO &io, NormalizedFile &file) {
io.mapRequired("arch", file.arch);
io.mapRequired("file-type", file.fileType);
io.mapOptional("flags", file.flags);
io.mapOptional("dependents", file.dependentDylibs);
io.mapOptional("install-name", file.installName, StringRef());
io.mapOptional("compat-version", file.compatVersion, PackedVersion(0x10000));
io.mapOptional("current-version", file.currentVersion, PackedVersion(0x10000));
io.mapOptional("has-UUID", file.hasUUID, true);
io.mapOptional("rpaths", file.rpaths);
io.mapOptional("entry-point", file.entryAddress, Hex64(0));
io.mapOptional("stack-size", file.stackSize, Hex64(0));
io.mapOptional("source-version", file.sourceVersion, Hex64(0));
io.mapOptional("OS", file.os);
io.mapOptional("min-os-version", file.minOSverson, PackedVersion(0));
io.mapOptional("min-os-version-kind", file.minOSVersionKind, (LoadCommandType)0);
io.mapOptional("sdk-version", file.sdkVersion, PackedVersion(0));
io.mapOptional("segments", file.segments);
io.mapOptional("sections", file.sections);
io.mapOptional("local-symbols", file.localSymbols);
io.mapOptional("global-symbols", file.globalSymbols);
io.mapOptional("undefined-symbols",file.undefinedSymbols);
io.mapOptional("page-size", file.pageSize, Hex32(4096));
io.mapOptional("rebasings", file.rebasingInfo);
io.mapOptional("bindings", file.bindingInfo);
io.mapOptional("weak-bindings", file.weakBindingInfo);
io.mapOptional("lazy-bindings", file.lazyBindingInfo);
io.mapOptional("exports", file.exportInfo);
io.mapOptional("dataInCode", file.dataInCode);
}
static StringRef validate(IO &io, NormalizedFile &file) {
return StringRef();
}
};
} // namespace llvm
} // namespace yaml
namespace lld {
namespace mach_o {
/// Handles !mach-o tagged yaml documents.
bool MachOYamlIOTaggedDocumentHandler::handledDocTag(llvm::yaml::IO &io,
const lld::File *&file) const {
if (!io.mapTag("!mach-o"))
return false;
// Step 1: parse yaml into normalized mach-o struct.
NormalizedFile nf;
YamlContext *info = reinterpret_cast<YamlContext *>(io.getContext());
assert(info != nullptr);
assert(info->_normalizeMachOFile == nullptr);
info->_normalizeMachOFile = &nf;
MappingTraits<NormalizedFile>::mapping(io, nf);
// Step 2: parse normalized mach-o struct into atoms.
auto fileOrError = normalizedToAtoms(nf, info->_path, true);
// Check that we parsed successfully.
if (!fileOrError) {
std::string buffer;
llvm::raw_string_ostream stream(buffer);
handleAllErrors(fileOrError.takeError(),
[&](const llvm::ErrorInfoBase &EI) {
EI.log(stream);
stream << "\n";
});
io.setError(stream.str());
return false;
}
if (nf.arch != _arch) {
io.setError(Twine("file is wrong architecture. Expected ("
+ MachOLinkingContext::nameFromArch(_arch)
+ ") found ("
+ MachOLinkingContext::nameFromArch(nf.arch)
+ ")"));
return false;
}
info->_normalizeMachOFile = nullptr;
file = fileOrError->release();
return true;
}
namespace normalized {
/// Parses a yaml encoded mach-o file to produce an in-memory normalized view.
llvm::Expected<std::unique_ptr<NormalizedFile>>
readYaml(std::unique_ptr<MemoryBuffer> &mb) {
// Make empty NormalizedFile.
std::unique_ptr<NormalizedFile> f(new NormalizedFile());
// Create YAML Input parser.
YamlContext yamlContext;
yamlContext._normalizeMachOFile = f.get();
llvm::yaml::Input yin(mb->getBuffer(), &yamlContext);
// Fill NormalizedFile by parsing yaml.
yin >> *f;
// Return error if there were parsing problems.
if (auto ec = yin.error())
return llvm::make_error<GenericError>(Twine("YAML parsing error: ")
+ ec.message());
// Hand ownership of instantiated NormalizedFile to caller.
return std::move(f);
}
/// Writes a yaml encoded mach-o files from an in-memory normalized view.
std::error_code writeYaml(const NormalizedFile &file, raw_ostream &out) {
// YAML I/O is not const aware, so need to cast away ;-(
NormalizedFile *f = const_cast<NormalizedFile*>(&file);
// Create yaml Output writer, using yaml options for context.
YamlContext yamlContext;
yamlContext._normalizeMachOFile = f;
llvm::yaml::Output yout(out, &yamlContext);
// Stream out yaml.
yout << *f;
return std::error_code();
}
} // namespace normalized
} // namespace mach_o
} // namespace lld
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