//
//===----------------------------------------------------------------------===//
-#include "llvm/ADT/SmallString.h"
+#include "yaml2obj.h"
#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/ADT/StringSwitch.h"
-#include "llvm/Object/COFFYaml.h"
-#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Endian.h"
+#include "llvm/Support/FileSystem.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
-#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/ToolOutputFile.h"
+#include "llvm/Support/YAMLTraits.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Support/system_error.h"
-#include <vector>
+#include <system_error>
using namespace llvm;
static cl::opt<std::string>
Input(cl::Positional, cl::desc("<input>"), cl::init("-"));
-/// This parses a yaml stream that represents a COFF object file.
-/// See docs/yaml2obj for the yaml scheema.
-struct COFFParser {
- COFFParser(COFFYAML::Object &Obj) : Obj(Obj) {
- // A COFF string table always starts with a 4 byte size field. Offsets into
- // it include this size, so allocate it now.
- StringTable.append(4, 0);
- }
-
- bool parseSections() {
- for (std::vector<COFFYAML::Section>::iterator i = Obj.Sections.begin(),
- e = Obj.Sections.end(); i != e; ++i) {
- COFFYAML::Section &Sec = *i;
-
- // If the name is less than 8 bytes, store it in place, otherwise
- // store it in the string table.
- StringRef Name = Sec.Name;
-
- if (Name.size() <= COFF::NameSize) {
- std::copy(Name.begin(), Name.end(), Sec.Header.Name);
- } else {
- // Add string to the string table and format the index for output.
- unsigned Index = getStringIndex(Name);
- std::string str = utostr(Index);
- if (str.size() > 7) {
- errs() << "String table got too large";
- return false;
- }
- Sec.Header.Name[0] = '/';
- std::copy(str.begin(), str.end(), Sec.Header.Name + 1);
- }
-
- Sec.Header.Characteristics |= (Log2_32(Sec.Alignment) + 1) << 20;
- }
- return true;
- }
-
- bool parseSymbols() {
- for (std::vector<COFFYAML::Symbol>::iterator i = Obj.Symbols.begin(),
- e = Obj.Symbols.end(); i != e; ++i) {
- COFFYAML::Symbol &Sym = *i;
-
- // If the name is less than 8 bytes, store it in place, otherwise
- // store it in the string table.
- StringRef Name = Sym.Name;
- if (Name.size() <= COFF::NameSize) {
- std::copy(Name.begin(), Name.end(), Sym.Header.Name);
- } else {
- // Add string to the string table and format the index for output.
- unsigned Index = getStringIndex(Name);
- *reinterpret_cast<support::aligned_ulittle32_t*>(
- Sym.Header.Name + 4) = Index;
- }
-
- Sym.Header.Type = Sym.SimpleType;
- Sym.Header.Type |= Sym.ComplexType << COFF::SCT_COMPLEX_TYPE_SHIFT;
- }
- return true;
- }
-
- bool parse() {
- if (!parseSections())
- return false;
- if (!parseSymbols())
- return false;
- return true;
- }
-
- unsigned getStringIndex(StringRef Str) {
- StringMap<unsigned>::iterator i = StringTableMap.find(Str);
- if (i == StringTableMap.end()) {
- unsigned Index = StringTable.size();
- StringTable.append(Str.begin(), Str.end());
- StringTable.push_back(0);
- StringTableMap[Str] = Index;
- return Index;
- }
- return i->second;
- }
-
- COFFYAML::Object &Obj;
-
- StringMap<unsigned> StringTableMap;
- std::string StringTable;
-};
-
-// Take a CP and assign addresses and sizes to everything. Returns false if the
-// layout is not valid to do.
-static bool layoutCOFF(COFFParser &CP) {
- uint32_t SectionTableStart = 0;
- uint32_t SectionTableSize = 0;
-
- // The section table starts immediately after the header, including the
- // optional header.
- SectionTableStart = sizeof(COFF::header) + CP.Obj.Header.SizeOfOptionalHeader;
- SectionTableSize = sizeof(COFF::section) * CP.Obj.Sections.size();
-
- uint32_t CurrentSectionDataOffset = SectionTableStart + SectionTableSize;
-
- // Assign each section data address consecutively.
- for (std::vector<COFFYAML::Section>::iterator i = CP.Obj.Sections.begin(),
- e = CP.Obj.Sections.end();
- i != e; ++i) {
- StringRef SecData = i->SectionData.getHex();
- if (!SecData.empty()) {
- i->Header.SizeOfRawData = SecData.size()/2;
- i->Header.PointerToRawData = CurrentSectionDataOffset;
- CurrentSectionDataOffset += i->Header.SizeOfRawData;
- if (!i->Relocations.empty()) {
- i->Header.PointerToRelocations = CurrentSectionDataOffset;
- i->Header.NumberOfRelocations = i->Relocations.size();
- CurrentSectionDataOffset += i->Header.NumberOfRelocations *
- COFF::RelocationSize;
- }
- // TODO: Handle alignment.
- } else {
- i->Header.SizeOfRawData = 0;
- i->Header.PointerToRawData = 0;
- }
- }
-
- uint32_t SymbolTableStart = CurrentSectionDataOffset;
-
- // Calculate number of symbols.
- uint32_t NumberOfSymbols = 0;
- for (std::vector<COFFYAML::Symbol>::iterator i = CP.Obj.Symbols.begin(),
- e = CP.Obj.Symbols.end();
- i != e; ++i) {
- unsigned AuxBytes = i->AuxiliaryData.getHex().size() / 2;
- if (AuxBytes % COFF::SymbolSize != 0) {
- errs() << "AuxiliaryData size not a multiple of symbol size!\n";
- return false;
- }
- i->Header.NumberOfAuxSymbols = AuxBytes / COFF::SymbolSize;
- NumberOfSymbols += 1 + i->Header.NumberOfAuxSymbols;
- }
-
- // Store all the allocated start addresses in the header.
- CP.Obj.Header.NumberOfSections = CP.Obj.Sections.size();
- CP.Obj.Header.NumberOfSymbols = NumberOfSymbols;
- CP.Obj.Header.PointerToSymbolTable = SymbolTableStart;
-
- *reinterpret_cast<support::ulittle32_t *>(&CP.StringTable[0])
- = CP.StringTable.size();
-
- return true;
-}
-
-template <typename value_type>
-struct binary_le_impl {
- value_type Value;
- binary_le_impl(value_type V) : Value(V) {}
+// TODO: The "right" way to tell what kind of object file a given YAML file
+// corresponds to is to look at YAML "tags" (e.g. `!Foo`). Then, different
+// tags (`!ELF`, `!COFF`, etc.) would be used to discriminate between them.
+// Interpreting the tags is needed eventually for when writing test cases,
+// so that we can e.g. have `!Archive` contain a sequence of `!ELF`, and
+// just Do The Right Thing. However, interpreting these tags and acting on
+// them appropriately requires some work in the YAML parser and the YAMLIO
+// library.
+enum YAMLObjectFormat {
+ YOF_COFF,
+ YOF_ELF
};
-template <typename value_type>
-raw_ostream &operator <<( raw_ostream &OS
- , const binary_le_impl<value_type> &BLE) {
- char Buffer[sizeof(BLE.Value)];
- support::endian::write<value_type, support::little, support::unaligned>(
- Buffer, BLE.Value);
- OS.write(Buffer, sizeof(BLE.Value));
- return OS;
-}
-
-template <typename value_type>
-binary_le_impl<value_type> binary_le(value_type V) {
- return binary_le_impl<value_type>(V);
-}
-
-static bool writeHexData(StringRef Data, raw_ostream &OS) {
- unsigned Size = Data.size();
- if (Size % 2)
- return false;
-
- for (unsigned I = 0; I != Size; I += 2) {
- uint8_t Byte;
- if (Data.substr(I, 2).getAsInteger(16, Byte))
- return false;
- OS.write(Byte);
- }
-
- return true;
-}
-
-bool writeCOFF(COFFParser &CP, raw_ostream &OS) {
- OS << binary_le(CP.Obj.Header.Machine)
- << binary_le(CP.Obj.Header.NumberOfSections)
- << binary_le(CP.Obj.Header.TimeDateStamp)
- << binary_le(CP.Obj.Header.PointerToSymbolTable)
- << binary_le(CP.Obj.Header.NumberOfSymbols)
- << binary_le(CP.Obj.Header.SizeOfOptionalHeader)
- << binary_le(CP.Obj.Header.Characteristics);
-
- // Output section table.
- for (std::vector<COFFYAML::Section>::iterator i = CP.Obj.Sections.begin(),
- e = CP.Obj.Sections.end();
- i != e; ++i) {
- OS.write(i->Header.Name, COFF::NameSize);
- OS << binary_le(i->Header.VirtualSize)
- << binary_le(i->Header.VirtualAddress)
- << binary_le(i->Header.SizeOfRawData)
- << binary_le(i->Header.PointerToRawData)
- << binary_le(i->Header.PointerToRelocations)
- << binary_le(i->Header.PointerToLineNumbers)
- << binary_le(i->Header.NumberOfRelocations)
- << binary_le(i->Header.NumberOfLineNumbers)
- << binary_le(i->Header.Characteristics);
- }
-
- // Output section data.
- for (std::vector<COFFYAML::Section>::iterator i = CP.Obj.Sections.begin(),
- e = CP.Obj.Sections.end();
- i != e; ++i) {
- StringRef SecData = i->SectionData.getHex();
- if (!SecData.empty()) {
- if (!writeHexData(SecData, OS)) {
- errs() << "SectionData must be a collection of pairs of hex bytes";
- return false;
- }
- }
- for (unsigned I2 = 0, E2 = i->Relocations.size(); I2 != E2; ++I2) {
- const COFF::relocation &R = i->Relocations[I2];
- OS << binary_le(R.VirtualAddress)
- << binary_le(R.SymbolTableIndex)
- << binary_le(R.Type);
- }
- }
-
- // Output symbol table.
-
- for (std::vector<COFFYAML::Symbol>::const_iterator i = CP.Obj.Symbols.begin(),
- e = CP.Obj.Symbols.end();
- i != e; ++i) {
- OS.write(i->Header.Name, COFF::NameSize);
- OS << binary_le(i->Header.Value)
- << binary_le(i->Header.SectionNumber)
- << binary_le(i->Header.Type)
- << binary_le(i->Header.StorageClass)
- << binary_le(i->Header.NumberOfAuxSymbols);
- StringRef Data = i->AuxiliaryData.getHex();
- if (!Data.empty()) {
- if (!writeHexData(Data, OS)) {
- errs() << "AuxiliaryData must be a collection of pairs of hex bytes";
- return false;
- }
- }
- }
-
- // Output string table.
- OS.write(&CP.StringTable[0], CP.StringTable.size());
- return true;
+cl::opt<YAMLObjectFormat> Format(
+ "format",
+ cl::desc("Interpret input as this type of object file"),
+ cl::values(
+ clEnumValN(YOF_COFF, "coff", "COFF object file format"),
+ clEnumValN(YOF_ELF, "elf", "ELF object file format"),
+ clEnumValEnd));
+
+cl::opt<unsigned>
+DocNum("docnum", cl::init(1),
+ cl::desc("Read specified document from input (default = 1)"));
+
+static cl::opt<std::string> OutputFilename("o", cl::desc("Output filename"),
+ cl::value_desc("filename"));
+
+typedef int (*ConvertFuncPtr)(yaml::Input & YIn, raw_ostream &Out);
+
+static int convertYAML(yaml::Input &YIn, raw_ostream &Out,
+ ConvertFuncPtr Convert) {
+ unsigned CurDocNum = 0;
+ do {
+ if (++CurDocNum == DocNum)
+ return Convert(YIn, Out);
+ } while (YIn.nextDocument());
+
+ errs() << "yaml2obj: Cannot find the " << DocNum
+ << llvm::getOrdinalSuffix(DocNum) << " document\n";
+ return 1;
}
int main(int argc, char **argv) {
PrettyStackTraceProgram X(argc, argv);
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
- OwningPtr<MemoryBuffer> Buf;
- if (MemoryBuffer::getFileOrSTDIN(Input, Buf))
- return 1;
+ if (OutputFilename.empty())
+ OutputFilename = "-";
- yaml::Input YIn(Buf->getBuffer());
- COFFYAML::Object Doc;
- YIn >> Doc;
- if (YIn.error()) {
- errs() << "yaml2obj: Failed to parse YAML file!\n";
+ std::error_code EC;
+ std::unique_ptr<tool_output_file> Out(
+ new tool_output_file(OutputFilename, EC, sys::fs::F_None));
+ if (EC) {
+ errs() << EC.message() << '\n';
return 1;
}
- COFFParser CP(Doc);
- if (!CP.parse()) {
- errs() << "yaml2obj: Failed to parse YAML file!\n";
+ ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
+ MemoryBuffer::getFileOrSTDIN(Input);
+ if (!Buf)
return 1;
- }
- if (!layoutCOFF(CP)) {
- errs() << "yaml2obj: Failed to layout COFF file!\n";
- return 1;
- }
- if (!writeCOFF(CP, outs())) {
- errs() << "yaml2obj: Failed to write COFF file!\n";
+ ConvertFuncPtr Convert = nullptr;
+ if (Format == YOF_COFF)
+ Convert = yaml2coff;
+ else if (Format == YOF_ELF)
+ Convert = yaml2elf;
+ else {
+ errs() << "Not yet implemented\n";
return 1;
}
+
+ yaml::Input YIn(Buf.get()->getBuffer());
+
+ int Res = convertYAML(YIn, Out->os(), Convert);
+ if (Res == 0)
+ Out->keep();
+
+ return Res;
}
projects / oota-llvm.git / blobdiff