9.349.34

1 files changed, 402 insertions, 238 deletions

diff --git a/CPP/7zip/Archive/MachoHandler.cpp b/CPP/7zip/Archive/MachoHandler.cpp
index a6261f34..11ff9703 100755..100644
--- a/CPP/7zip/Archive/MachoHandler.cpp
+++ b/CPP/7zip/Archive/MachoHandler.cpp
@@ -4,10 +4,12 @@
 
 #include "../../../C/CpuArch.h"
 
-#include "Common/Buffer.h"
-#include "Common/ComTry.h"
+#include "../../Common/ComTry.h"
+#include "../../Common/MyBuffer.h"
+#include "../../Common/StringConvert.h"
+#include "../../Common/IntToString.h"
 
-#include "Windows/PropVariantUtils.h"
+#include "../../Windows/PropVariantUtils.h"
 
 #include "../Common/LimitedStreams.h"
 #include "../Common/ProgressUtils.h"
@@ -16,65 +18,142 @@
 
 #include "../Compress/CopyCoder.h"
 
-static UInt32 Get32(const Byte *p, int be) { if (be) return GetBe32(p); return GetUi32(p); }
-static UInt64 Get64(const Byte *p, int be) { if (be) return GetBe64(p); return GetUi64(p); }
+static UInt32 Get32(const Byte *p, bool be) { if (be) return GetBe32(p); return GetUi32(p); }
+static UInt64 Get64(const Byte *p, bool be) { if (be) return GetBe64(p); return GetUi64(p); }
 
 using namespace NWindows;
+using namespace NCOM;
 
 namespace NArchive {
 namespace NMacho {
 
-#define MACH_ARCH_ABI64 (1 << 24)
-#define MACH_MACHINE_386 7
-#define MACH_MACHINE_ARM 12
-#define MACH_MACHINE_SPARC 14
-#define MACH_MACHINE_PPC 18
+#define CPU_ARCH_ABI64 (1 << 24)
+#define CPU_TYPE_386    7
+#define CPU_TYPE_ARM   12
+#define CPU_TYPE_SPARC 14
+#define CPU_TYPE_PPC   18
 
-#define MACH_MACHINE_PPC64 (MACH_ARCH_ABI64 | MACH_MACHINE_PPC)
-#define MACH_MACHINE_AMD64 (MACH_ARCH_ABI64 | MACH_MACHINE_386)
+#define CPU_SUBTYPE_I386_ALL 3
 
-#define MACH_CMD_SEGMENT_32 1
-#define MACH_CMD_SEGMENT_64 0x19
+#define CPU_TYPE_PPC64 (CPU_ARCH_ABI64 | CPU_TYPE_PPC)
+#define CPU_TYPE_AMD64 (CPU_ARCH_ABI64 | CPU_TYPE_386)
 
-#define MACH_SECT_TYPE_MASK 0x000000FF
-#define MACH_SECT_ATTR_MASK 0xFFFFFF00
+#define CPU_SUBTYPE_LIB64 (1 << 31)
 
-#define MACH_SECT_ATTR_ZEROFILL 1
+#define CPU_SUBTYPE_POWERPC_970	100
+
+static const char *k_PowerPc_SubTypes[] =
+{
+  NULL
+  , "601"
+  , "602"
+  , "603"
+  , "603e"
+  , "603ev"
+  , "604"
+  , "604e"
+  , "620"
+  , "750"
+  , "7400"
+  , "7450"
+};
+
+static const CUInt32PCharPair g_CpuPairs[] =
+{
+  { CPU_TYPE_386, "x86" },
+  { CPU_TYPE_ARM, "ARM" },
+  { CPU_TYPE_SPARC, "SPARC" },
+  { CPU_TYPE_PPC, "PowerPC" }
+};
+
+
+#define CMD_SEGMENT_32 1
+#define CMD_SEGMENT_64 0x19
+
+#define SECT_TYPE_MASK 0x000000FF
+#define SECT_ATTR_MASK 0xFFFFFF00
+
+#define SECT_ATTR_ZEROFILL 1
 
 static const char *g_SectTypes[] =
 {
-  "REGULAR",
-  "ZEROFILL",
-  "CSTRINGS",
-  "4BYTE_LITERALS",
-  "8BYTE_LITERALS",
-  "LITERAL_POINTERS",
-  "NON_LAZY_SYMBOL_POINTERS",
-  "LAZY_SYMBOL_POINTERS",
-  "SYMBOL_STUBS",
-  "MOD_INIT_FUNC_POINTERS",
-  "MOD_TERM_FUNC_POINTERS",
-  "COALESCED",
-  "GB_ZEROFILL",
-  "INTERPOSING",
-  "16BYTE_LITERALS"
+    "REGULAR"
+  , "ZEROFILL"
+  , "CSTRINGS"
+  , "4BYTE_LITERALS"
+  , "8BYTE_LITERALS"
+  , "LITERAL_POINTERS"
+  , "NON_LAZY_SYMBOL_POINTERS"
+  , "LAZY_SYMBOL_POINTERS"
+  , "SYMBOL_STUBS"
+  , "MOD_INIT_FUNC_POINTERS"
+  , "MOD_TERM_FUNC_POINTERS"
+  , "COALESCED"
+  , "GB_ZEROFILL"
+  , "INTERPOSING"
+  , "16BYTE_LITERALS"
+};
+
+enum EFileType
+{
+  kType_OBJECT = 1,
+  kType_EXECUTE,
+  kType_FVMLIB,
+  kType_CORE,
+  kType_PRELOAD,
+  kType_DYLIB,
+  kType_DYLINKER,
+  kType_BUNDLE,
+  kType_DYLIB_STUB,
+  kType_DSYM
 };
 
 static const char *g_FileTypes[] =
 {
-  "0",
-  "OBJECT",
-  "EXECUTE",
-  "FVMLIB",
-  "CORE",
-  "PRELOAD",
-  "DYLIB",
-  "DYLINKER",
-  "BUNDLE",
-  "DYLIB_STUB",
-  "DSYM"
+    "0"
+  , "OBJECT"
+  , "EXECUTE"
+  , "FVMLIB"
+  , "CORE"
+  , "PRELOAD"
+  , "DYLIB"
+  , "DYLINKER"
+  , "BUNDLE"
+  , "DYLIB_STUB"
+  , "DSYM"
 };
 
+
+static const char *g_ArcFlags[] =
+{
+    "NOUNDEFS"
+  , "INCRLINK"
+  , "DYLDLINK"
+  , "BINDATLOAD"
+  , "PREBOUND"
+  , "SPLIT_SEGS"
+  , "LAZY_INIT"
+  , "TWOLEVEL"
+  , "FORCE_FLAT"
+  , "NOMULTIDEFS"
+  , "NOFIXPREBINDING"
+  , "PREBINDABLE"
+  , "ALLMODSBOUND"
+  , "SUBSECTIONS_VIA_SYMBOLS"
+  , "CANONICAL"
+  , "WEAK_DEFINES"
+  , "BINDS_TO_WEAK"
+  , "ALLOW_STACK_EXECUTION"
+  , "ROOT_SAFE"
+  , "SETUID_SAFE"
+  , "NO_REEXPORTED_DYLIBS"
+  , "PIE"
+  , "DEAD_STRIPPABLE_DYLIB"
+  , "HAS_TLV_DESCRIPTORS"
+  , "NO_HEAP_EXECUTION"
+};
+
+
 static const CUInt32PCharPair g_Flags[] =
 {
   { 31, "PURE_INSTRUCTIONS" },
@@ -89,16 +168,6 @@ static const CUInt32PCharPair g_Flags[] =
   {  8, "LOC_RELOC" }
 };
 
-static const CUInt32PCharPair g_MachinePairs[] =
-{
-  { MACH_MACHINE_386, "x86" },
-  { MACH_MACHINE_ARM, "ARM" },
-  { MACH_MACHINE_SPARC, "SPARC" },
-  { MACH_MACHINE_PPC, "PowerPC" },
-  { MACH_MACHINE_PPC64, "PowerPC 64-bit" },
-  { MACH_MACHINE_AMD64, "x64" }
-};
-
 static const int kNameSize = 16;
 
 struct CSegment
@@ -121,209 +190,150 @@ struct CSection
   bool IsDummy;
 
   CSection(): IsDummy(false) {}
-  // UInt64 GetPackSize() const { return Flags == MACH_SECT_ATTR_ZEROFILL ? 0 : Size; }
+  // UInt64 GetPackSize() const { return Flags == SECT_ATTR_ZEROFILL ? 0 : Size; }
   UInt64 GetPackSize() const { return PSize; }
 };
 
 
 class CHandler:
   public IInArchive,
+  public IArchiveAllowTail,
   public CMyUnknownImp
 {
   CMyComPtr<IInStream> _inStream;
   CObjectVector<CSegment> _segments;
   CObjectVector<CSection> _sections;
+  bool _allowTail;
   bool _mode64;
   bool _be;
-  UInt32 _machine;
+  UInt32 _cpuType;
+  UInt32 _cpuSubType;
   UInt32 _type;
+  UInt32 _flags;
   UInt32 _headersSize;
   UInt64 _totalSize;
+
   HRESULT Open2(ISequentialInStream *stream);
-  bool Parse(const Byte *buf, UInt32 size);
 public:
-  MY_UNKNOWN_IMP1(IInArchive)
+  MY_UNKNOWN_IMP2(IInArchive, IArchiveAllowTail)
   INTERFACE_IInArchive(;)
+  STDMETHOD(AllowTail)(Int32 allowTail);
+  CHandler(): _allowTail(false) {}
 };
 
-bool CHandler::Parse(const Byte *buf, UInt32 size)
+static const Byte kArcProps[] =
 {
-  bool mode64 = _mode64;
-  bool be = _be;
-
-  const Byte *bufStart = buf;
-  bool reduceCommands = false;
-  if (size < 512)
-    return false;
-
-  _machine = Get32(buf + 4, be);
-  _type = Get32(buf + 0xC, be);
-
-  UInt32 numCommands = Get32(buf + 0x10, be);
-  UInt32 commandsSize = Get32(buf + 0x14, be);
-  if (commandsSize > size)
-    return false;
-
-  if (commandsSize > (1 << 24) || numCommands > (1 << 18))
-    return false;
-
-  if (numCommands > 16)
-  {
-    reduceCommands = true;
-    numCommands = 16;
-  }
-
-  _headersSize = 0;
-
-  buf += 0x1C;
-  size -= 0x1C;
+  kpidCpu,
+  kpidBit64,
+  kpidBigEndian,
+  kpidCharacts,
+  kpidHeadersSize
+};
 
-  if (mode64)
-  {
-    buf += 4;
-    size -= 4;
-  }
+static const Byte kProps[] =
+{
+  kpidPath,
+  kpidSize,
+  kpidPackSize,
+  kpidCharacts,
+  kpidOffset,
+  kpidVa
+};
 
-  _totalSize = (UInt32)(buf - bufStart);
-  if (commandsSize < size)
-    size = commandsSize;
+IMP_IInArchive_Props
+IMP_IInArchive_ArcProps
 
-  for (UInt32 cmdIndex = 0; cmdIndex < numCommands; cmdIndex++)
+STDMETHODIMP CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value)
+{
+  COM_TRY_BEGIN
+  CPropVariant prop;
+  switch (propID)
   {
-    if (size < 8)
-      return false;
-    UInt32 cmd = Get32(buf, be);
-    UInt32 cmdSize = Get32(buf + 4, be);
-    if (size < cmdSize)
-      return false;
-    if (cmd == MACH_CMD_SEGMENT_32 || cmd == MACH_CMD_SEGMENT_64)
+    case kpidShortComment:
+    case kpidCpu:
     {
-      UInt32 offs = (cmd == MACH_CMD_SEGMENT_64) ? 0x48 : 0x38;
-      if (cmdSize < offs)
-        break;
-
-      UInt64 vmAddr, vmSize, phAddr, phSize;
-
+      AString s;
+      char temp[16];
+      UInt32 cpu = _cpuType & ~(UInt32)CPU_ARCH_ABI64;
+      if (_cpuType == CPU_TYPE_AMD64)
+        s = "x64";
+      else
       {
-        if (cmd == MACH_CMD_SEGMENT_64)
-        {
-          vmAddr = Get64(buf + 0x18, be);
-          vmSize = Get64(buf + 0x20, be);
-          phAddr = Get64(buf + 0x28, be);
-          phSize = Get64(buf + 0x30, be);
-        }
-        else
+        const char *n = NULL;
+        for (unsigned i = 0; i < ARRAY_SIZE(g_CpuPairs); i++)
         {
-          vmAddr = Get32(buf + 0x18, be);
-          vmSize = Get32(buf + 0x1C, be);
-          phAddr = Get32(buf + 0x20, be);
-          phSize = Get32(buf + 0x24, be);
+          const CUInt32PCharPair &pair = g_CpuPairs[i];
+          if (pair.Value == cpu)
+          {
+            n = pair.Name;
+            break;
+          }
         }
+        if (!n)
         {
-          UInt64 totalSize = phAddr + phSize;
-          if (totalSize > _totalSize)
-            _totalSize = totalSize;
+          ConvertUInt32ToString(cpu, temp);
+          n = temp;
         }
+        s = n;
+       
+        if (_cpuType & CPU_ARCH_ABI64)
+          s += " 64-bit";
+        else if (_cpuSubType & CPU_SUBTYPE_LIB64)
+          s += " 64-bit lib";
       }
-      
-      CSegment seg;
-      memcpy(seg.Name, buf + 8, kNameSize);
-      _segments.Add(seg);
-
-      UInt32 numSections = Get32(buf + offs - 8, be);
-      if (numSections > (1 << 8))
-        return false;
-
-      if (numSections == 0)
-      {
-        CSection section;
-        section.IsDummy = true;
-        section.SegmentIndex = _segments.Size() - 1;
-          section.Va = vmAddr;
-          section.PSize = phSize;
-          section.VSize = vmSize;
-          section.Pa = phAddr;
-          section.Flags = 0;
-        _sections.Add(section);
-      }
-      else do
+      UInt32 t = _cpuSubType & ~(UInt32)CPU_SUBTYPE_LIB64;
+      if (t != 0 && (t != CPU_SUBTYPE_I386_ALL || cpu != CPU_TYPE_386))
       {
-        CSection section;
-        UInt32 headerSize = (cmd == MACH_CMD_SEGMENT_64) ? 0x50 : 0x44;
-        const Byte *p = buf + offs;
-        if (cmdSize - offs < headerSize)
-          break;
-        if (cmd == MACH_CMD_SEGMENT_64)
+        const char *n = NULL;
+        if (cpu == CPU_TYPE_PPC)
         {
-          section.Va = Get64(p + 0x20, be);
-          section.VSize = Get64(p + 0x28, be);
-          section.Pa = Get32(p + 0x30, be);
-          section.Flags = Get32(p + 0x40, be);
+          if (t == CPU_SUBTYPE_POWERPC_970)
+            n = "970";
+          else if (t < ARRAY_SIZE(k_PowerPc_SubTypes))
+            n = k_PowerPc_SubTypes[t];
         }
-        else
+        if (!n)
         {
-          section.Va = Get32(p + 0x20, be);
-          section.VSize = Get32(p + 0x24, be);
-          section.Pa = Get32(p + 0x28, be);
-          section.Flags = Get32(p + 0x38, be);
+          ConvertUInt32ToString(t, temp);
+          n = temp;
         }
-        if (section.Flags == MACH_SECT_ATTR_ZEROFILL)
-          section.PSize = 0;
-        else
-          section.PSize = section.VSize;
-        memcpy(section.Name, p, kNameSize);
-        memcpy(section.SegName, p + kNameSize, kNameSize);
-        section.SegmentIndex = _segments.Size() - 1;
-        _sections.Add(section);
-        offs += headerSize;
+        s += ' ';
+        s += n;
       }
-      while (--numSections);
-
-      if (offs != cmdSize)
-        return false;
+      prop = s;
+      break;
+    }
+    case kpidCharacts:
+    {
+      // TYPE_TO_PROP(g_FileTypes, _type, prop); break;
+      AString res = TypeToString(g_FileTypes, ARRAY_SIZE(g_FileTypes), _type);
+      AString s = FlagsToString(g_ArcFlags, ARRAY_SIZE(g_ArcFlags), _flags);
+      if (!s.IsEmpty())
+      {
+        res += ' ';
+        res += s;
+      }
+      prop = res;
+      break;
     }
-    buf += cmdSize;
-    size -= cmdSize;
-  }
-  _headersSize = (UInt32)(buf - bufStart);
-  return reduceCommands || (size == 0);
-}
-
-static STATPROPSTG kArcProps[] =
-{
-  { NULL, kpidCpu, VT_BSTR},
-  { NULL, kpidBit64, VT_BOOL},
-  { NULL, kpidBigEndian, VT_BOOL},
-  { NULL, kpidCharacts, VT_BSTR},
-  { NULL, kpidPhySize, VT_UI8},
-  { NULL, kpidHeadersSize, VT_UI4}
-};
-
-static STATPROPSTG kProps[] =
-{
-  { NULL, kpidPath, VT_BSTR},
-  { NULL, kpidSize, VT_UI8},
-  { NULL, kpidPackSize, VT_UI8},
-  { NULL, kpidCharacts, VT_BSTR},
-  { NULL, kpidOffset, VT_UI8},
-  { NULL, kpidVa, VT_UI8}
-};
-
-IMP_IInArchive_Props
-IMP_IInArchive_ArcProps
-
-STDMETHODIMP CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value)
-{
-  COM_TRY_BEGIN
-  NCOM::CPropVariant prop;
-  switch(propID)
-  {
-    case kpidCpu:  PAIR_TO_PROP(g_MachinePairs, _machine, prop); break;
-    case kpidCharacts:  TYPE_TO_PROP(g_FileTypes, _type, prop); break;
     case kpidPhySize:  prop = _totalSize; break;
     case kpidHeadersSize:  prop = _headersSize; break;
     case kpidBit64:  if (_mode64) prop = _mode64; break;
     case kpidBigEndian:  if (_be) prop = _be; break;
+    case kpidExtension:
+    {
+      const char *ext = NULL;
+      if (_type == kType_OBJECT)
+        ext = "o";
+      else if (_type == kType_BUNDLE)
+        ext = "bundle";
+      else if (_type == kType_DYLIB)
+        ext = "dylib"; // main shared library usually does not have extension
+      if (ext)
+        prop = ext;
+      break;
+    }
+    // case kpidIsSelfExe: prop = (_type == kType_EXECUTE); break;
   }
   prop.Detach(value);
   return S_OK;
@@ -340,10 +350,8 @@ static AString GetName(const char *name)
 
 static AString SectFlagsToString(UInt32 flags)
 {
-  AString res = TypeToString(g_SectTypes, sizeof(g_SectTypes) / sizeof(g_SectTypes[0]),
-      flags & MACH_SECT_TYPE_MASK);
-  AString s = FlagsToString(g_Flags, sizeof(g_Flags) / sizeof(g_Flags[0]),
-      flags & MACH_SECT_ATTR_MASK);
+  AString res = TypeToString(g_SectTypes, ARRAY_SIZE(g_SectTypes), flags & SECT_TYPE_MASK);
+  AString s = FlagsToString(g_Flags, ARRAY_SIZE(g_Flags), flags & SECT_ATTR_MASK);
   if (!s.IsEmpty())
   {
     res += ' ';
@@ -355,21 +363,21 @@ static AString SectFlagsToString(UInt32 flags)
 STDMETHODIMP CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *value)
 {
   COM_TRY_BEGIN
-  NCOM::CPropVariant prop;
+  CPropVariant prop;
   const CSection &item = _sections[index];
-  switch(propID)
+  switch (propID)
   {
     case kpidPath:
     {
       AString s = GetName(_segments[item.SegmentIndex].Name);
       if (!item.IsDummy)
         s += GetName(item.Name);
-      StringToProp(s, prop);
+      prop = MultiByteToUnicodeString(s);
       break;
     }
     case kpidSize:  /* prop = (UInt64)item.VSize; break; */
     case kpidPackSize:  prop = (UInt64)item.GetPackSize(); break;
-    case kpidCharacts:  if (!item.IsDummy) StringToProp(SectFlagsToString(item.Flags), prop); break;
+    case kpidCharacts:  if (!item.IsDummy) prop = SectFlagsToString(item.Flags); break;
     case kpidOffset:  prop = item.Pa; break;
     case kpidVa:  prop = item.Va; break;
   }
@@ -380,18 +388,12 @@ STDMETHODIMP CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *val
 
 HRESULT CHandler::Open2(ISequentialInStream *stream)
 {
-  const UInt32 kBufSize = 1 << 18;
-  const UInt32 kSigSize = 4;
+  const UInt32 kStartHeaderSize = 7 * 4;
 
-  CByteBuffer buffer;
-  buffer.SetCapacity(kBufSize);
-  Byte *buf = buffer;
-
-  size_t processed = kSigSize;
-  RINOK(ReadStream_FALSE(stream, buf, processed));
-  UInt32 sig = GetUi32(buf);
+  Byte header[kStartHeaderSize];
+  RINOK(ReadStream_FALSE(stream, header, kStartHeaderSize));
   bool be, mode64;
-  switch(sig)
+  switch (GetUi32(header))
   {
     case 0xCEFAEDFE:  be = true; mode64 = false; break;
     case 0xCFFAEDFE:  be = true; mode64 = true; break;
@@ -399,11 +401,148 @@ HRESULT CHandler::Open2(ISequentialInStream *stream)
     case 0xFEEDFACF:  be = false; mode64 = true; break;
     default: return S_FALSE;
   }
-  processed = kBufSize - kSigSize;
-  RINOK(ReadStream(stream, buf + kSigSize, &processed));
-  _mode64 = mode64;
-  _be = be;
-  return Parse(buf, (UInt32)processed + kSigSize) ? S_OK : S_FALSE;
+  
+  UInt32 numCommands = Get32(header + 0x10, be);
+  UInt32 commandsSize = Get32(header + 0x14, be);
+
+  if (numCommands == 0)
+    return S_FALSE;
+
+  if (commandsSize > (1 << 24) ||
+      numCommands > (1 << 21) ||
+      numCommands * 8 > commandsSize)
+    return S_FALSE;
+
+  _cpuType = Get32(header + 4, be);
+  _cpuSubType = Get32(header + 8, be);
+  _type = Get32(header + 0xC, be);
+  _flags = Get32(header + 0x18, be);
+
+  /*
+  // Probably the sections are in first commands. So we can reduce the number of commands.
+  bool reduceCommands = false;
+  const UInt32 kNumReduceCommands = 16;
+  if (numCommands > kNumReduceCommands)
+  {
+    reduceCommands = true;
+    numCommands = kNumReduceCommands;
+  }
+  */
+
+  UInt32 startHeaderSize = kStartHeaderSize;
+  if (mode64)
+    startHeaderSize += 4;
+  _headersSize = startHeaderSize + commandsSize;
+  _totalSize = _headersSize;
+  CByteArr buffer(_headersSize);
+  RINOK(ReadStream_FALSE(stream, buffer + kStartHeaderSize, _headersSize - kStartHeaderSize));
+  const Byte *buf = buffer + startHeaderSize;
+  size_t size = _headersSize - startHeaderSize;
+  for (UInt32 cmdIndex = 0; cmdIndex < numCommands; cmdIndex++)
+  {
+    if (size < 8)
+      return S_FALSE;
+    UInt32 cmd = Get32(buf, be);
+    UInt32 cmdSize = Get32(buf + 4, be);
+    if (cmdSize < 8)
+      return S_FALSE;
+    if (size < cmdSize)
+      return S_FALSE;
+    if (cmd == CMD_SEGMENT_32 || cmd == CMD_SEGMENT_64)
+    {
+      UInt32 offs = (cmd == CMD_SEGMENT_64) ? 0x48 : 0x38;
+      if (cmdSize < offs)
+        break;
+
+      UInt64 vmAddr, vmSize, phAddr, phSize;
+
+      {
+        if (cmd == CMD_SEGMENT_64)
+        {
+          vmAddr = Get64(buf + 0x18, be);
+          vmSize = Get64(buf + 0x20, be);
+          phAddr = Get64(buf + 0x28, be);
+          phSize = Get64(buf + 0x30, be);
+        }
+        else
+        {
+          vmAddr = Get32(buf + 0x18, be);
+          vmSize = Get32(buf + 0x1C, be);
+          phAddr = Get32(buf + 0x20, be);
+          phSize = Get32(buf + 0x24, be);
+        }
+        {
+          UInt64 totalSize = phAddr + phSize;
+          if (totalSize < phAddr)
+            return S_FALSE;
+          if (_totalSize < totalSize)
+            _totalSize = totalSize;
+        }
+      }
+      
+      CSegment seg;
+      memcpy(seg.Name, buf + 8, kNameSize);
+      _segments.Add(seg);
+
+      UInt32 numSections = Get32(buf + offs - 8, be);
+      if (numSections > (1 << 8))
+        return S_FALSE;
+
+      if (numSections == 0)
+      {
+        CSection &sect = _sections.AddNew();
+        sect.IsDummy = true;
+        sect.SegmentIndex = _segments.Size() - 1;
+        sect.Va = vmAddr;
+        sect.PSize = phSize;
+        sect.VSize = vmSize;
+        sect.Pa = phAddr;
+        sect.Flags = 0;
+      }
+      else do
+      {
+        UInt32 headSize = (cmd == CMD_SEGMENT_64) ? 0x50 : 0x44;
+        const Byte *p = buf + offs;
+        if (cmdSize - offs < headSize)
+          break;
+        CSection &sect = _sections.AddNew();
+        unsigned f32Offset;
+        if (cmd == CMD_SEGMENT_64)
+        {
+          sect.Va    = Get64(p + 0x20, be);
+          sect.VSize = Get64(p + 0x28, be);
+          f32Offset = 0x30;
+        }
+        else
+        {
+          sect.Va    = Get32(p + 0x20, be);
+          sect.VSize = Get32(p + 0x24, be);
+          f32Offset = 0x28;
+        }
+        sect.Pa    = Get32(p + f32Offset, be);
+        sect.Flags = Get32(p + f32Offset + 10, be);
+        if (sect.Flags == SECT_ATTR_ZEROFILL)
+          sect.PSize = 0;
+        else
+          sect.PSize = sect.VSize;
+        memcpy(sect.Name, p, kNameSize);
+        memcpy(sect.SegName, p + kNameSize, kNameSize);
+        sect.SegmentIndex = _segments.Size() - 1;
+        offs += headSize;
+      }
+      while (--numSections);
+
+      if (offs != cmdSize)
+        return S_FALSE;
+    }
+    buf += cmdSize;
+    size -= cmdSize;
+  }
+  // return (reduceCommands || (size == 0)) ? S_OK : S_FALSE;
+  if (size != 0)
+    return S_FALSE;
+
+  return S_OK;
 }
 
 STDMETHODIMP CHandler::Open(IInStream *inStream,
@@ -413,6 +552,13 @@ STDMETHODIMP CHandler::Open(IInStream *inStream,
   COM_TRY_BEGIN
   Close();
   RINOK(Open2(inStream));
+  if (!_allowTail)
+  {
+    UInt64 fileSize;
+    RINOK(inStream->Seek(0, STREAM_SEEK_END, &fileSize));
+    if (fileSize > _totalSize)
+      return S_FALSE;
+  }
   _inStream = inStream;
   return S_OK;
   COM_TRY_END
@@ -420,6 +566,7 @@ STDMETHODIMP CHandler::Open(IInStream *inStream,
 
 STDMETHODIMP CHandler::Close()
 {
+  _totalSize = 0;
   _inStream.Release();
   _sections.Clear();
   _segments.Clear();
@@ -436,7 +583,7 @@ STDMETHODIMP CHandler::Extract(const UInt32 *indices, UInt32 numItems,
     Int32 testMode, IArchiveExtractCallback *extractCallback)
 {
   COM_TRY_BEGIN
-  bool allFilesMode = (numItems == (UInt32)-1);
+  bool allFilesMode = (numItems == (UInt32)(Int32)-1);
   if (allFilesMode)
     numItems = _sections.Size();
   if (numItems == 0)
@@ -490,10 +637,27 @@ STDMETHODIMP CHandler::Extract(const UInt32 *indices, UInt32 numItems,
   COM_TRY_END
 }
 
-static IInArchive *CreateArc() { return new CHandler; }
+STDMETHODIMP CHandler::AllowTail(Int32 allowTail)
+{
+  _allowTail = IntToBool(allowTail);
+  return S_OK;
+}
+
+IMP_CreateArcIn
+
+#define k_Signature { \
+  4, 0xCE, 0xFA, 0xED, 0xFE, \
+  4, 0xCF, 0xFA, 0xED, 0xFE, \
+  4, 0xFE, 0xED, 0xFA, 0xCE, \
+  4, 0xFE, 0xED, 0xFA, 0xCF }
 
 static CArcInfo g_ArcInfo =
-  { L"MachO", L"", 0, 0xDF, { 0 }, 0, false, CreateArc, 0 };
+  { "MachO", "macho", 0, 0xDF,
+  4 * 5, k_Signature,
+  0,
+  NArcInfoFlags::kMultiSignature |
+  NArcInfoFlags::kPreArc,
+  CreateArc };
 
 REGISTER_ARC(Macho)