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2efa10565ac395d2ce9a679ead46e70fb2f963eb
easy7zip/CPP/7zip/Archive/ElfHandler.cpp
Igor Pavlov 2efa10565a 17.00
2017-05-05 18:56:20 +01:00

1106 lines
24 KiB
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// ElfHandler.cpp
#include "StdAfx.h"
#include "../../../C/CpuArch.h"
#include "../../Common/ComTry.h"
#include "../../Common/IntToString.h"
#include "../../Common/MyBuffer.h"
#include "../../Windows/PropVariantUtils.h"
#include "../Common/LimitedStreams.h"
#include "../Common/ProgressUtils.h"
#include "../Common/RegisterArc.h"
#include "../Common/StreamUtils.h"
#include "../Compress/CopyCoder.h"
using namespace NWindows;
static UInt16 Get16(const Byte *p, bool be) { if (be) return GetBe16(p); return GetUi16(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); }
#define G16(offs, v) v = Get16(p + (offs), be)
#define G32(offs, v) v = Get32(p + (offs), be)
#define G64(offs, v) v = Get64(p + (offs), be)
namespace NArchive {
namespace NElf {
/*
ELF Structure for most files (real order can be different):
Header
Program (segment) header table (used at runtime)
Segment1 (Section ... Section)
Segment2
...
SegmentN
Section header table (the data for linking and relocation)
*/
#define ELF_CLASS_32 1
#define ELF_CLASS_64 2
#define ELF_DATA_2LSB 1
#define ELF_DATA_2MSB 2
static const UInt32 kHeaderSize32 = 0x34;
static const UInt32 kHeaderSize64 = 0x40;
static const UInt32 kSegmentSize32 = 0x20;
static const UInt32 kSegmentSize64 = 0x38;
static const UInt32 kSectionSize32 = 0x28;
static const UInt32 kSectionSize64 = 0x40;
struct CHeader
{
bool Mode64;
bool Be;
Byte Os;
Byte AbiVer;
UInt16 Type;
UInt16 Machine;
// UInt32 Version;
// UInt64 EntryVa;
UInt64 ProgOffset;
UInt64 SectOffset;
UInt32 Flags;
UInt16 HeaderSize;
UInt16 SegmentEntrySize;
UInt16 NumSegments;
UInt16 SectionEntrySize;
UInt16 NumSections;
UInt16 NamesSectIndex;
bool Parse(const Byte *buf);
UInt64 GetHeadersSize() const { return (UInt64)HeaderSize +
(UInt32)NumSegments * SegmentEntrySize +
(UInt32)NumSections * SectionEntrySize; }
};
bool CHeader::Parse(const Byte *p)
{
switch (p[4])
{
case ELF_CLASS_32: Mode64 = false; break;
case ELF_CLASS_64: Mode64 = true; break;
default: return false;
}
bool be;
switch (p[5])
{
case ELF_DATA_2LSB: be = false; break;
case ELF_DATA_2MSB: be = true; break;
default: return false;
}
Be = be;
if (p[6] != 1) // Version
return false;
Os = p[7];
AbiVer = p[8];
for (int i = 9; i < 16; i++)
if (p[i] != 0)
return false;
G16(0x10, Type);
G16(0x12, Machine);
if (Get32(p + 0x14, be) != 1) // Version
return false;
if (Mode64)
{
// G64(0x18, EntryVa);
G64(0x20, ProgOffset);
G64(0x28, SectOffset);
p += 0x30;
}
else
{
// G32(0x18, EntryVa);
G32(0x1C, ProgOffset);
G32(0x20, SectOffset);
p += 0x24;
}
G32(0, Flags);
G16(4, HeaderSize);
if (HeaderSize != (Mode64 ? kHeaderSize64 : kHeaderSize32))
return false;
G16(6, SegmentEntrySize);
G16(8, NumSegments);
G16(10, SectionEntrySize);
G16(12, NumSections);
G16(14, NamesSectIndex);
if (ProgOffset < HeaderSize && (ProgOffset != 0 || NumSegments != 0)) return false;
if (SectOffset < HeaderSize && (SectOffset != 0 || NumSections != 0)) return false;
if (SegmentEntrySize == 0) { if (NumSegments != 0) return false; }
else if (SegmentEntrySize != (Mode64 ? kSegmentSize64 : kSegmentSize32)) return false;
if (SectionEntrySize == 0) { if (NumSections != 0) return false; }
else if (SectionEntrySize != (Mode64 ? kSectionSize64 : kSectionSize32)) return false;
return true;
}
// The program header table itself.
#define PT_PHDR 6
static const char * const g_SegnmentTypes[] =
{
"Unused"
, "Loadable segment"
, "Dynamic linking tables"
, "Program interpreter path name"
, "Note section"
, "SHLIB"
, "Program header table"
, "TLS"
};
static const char * const g_SegmentFlags[] =
{
"Execute"
, "Write"
, "Read"
};
struct CSegment
{
UInt32 Type;
UInt32 Flags;
UInt64 Offset;
UInt64 Va;
// UInt64 Pa;
UInt64 Size;
UInt64 VSize;
UInt64 Align;
void UpdateTotalSize(UInt64 &totalSize)
{
UInt64 t = Offset + Size;
if (totalSize < t)
totalSize = t;
}
void Parse(const Byte *p, bool mode64, bool be);
};
void CSegment::Parse(const Byte *p, bool mode64, bool be)
{
G32(0, Type);
if (mode64)
{
G32(4, Flags);
G64(8, Offset);
G64(0x10, Va);
// G64(0x18, Pa);
G64(0x20, Size);
G64(0x28, VSize);
G64(0x30, Align);
}
else
{
G32(4, Offset);
G32(8, Va);
// G32(0x0C, Pa);
G32(0x10, Size);
G32(0x14, VSize);
G32(0x18, Flags);
G32(0x1C, Align);
}
}
// Section_index = 0 means NO section
#define SHN_UNDEF 0
// Section types
#define SHT_NULL 0
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_RELA 4
#define SHT_HASH 5
#define SHT_DYNAMIC 6
#define SHT_NOTE 7
#define SHT_NOBITS 8
#define SHT_REL 9
#define SHT_SHLIB 10
#define SHT_DYNSYM 11
#define SHT_UNKNOWN12 12
#define SHT_UNKNOWN13 13
#define SHT_INIT_ARRAY 14
#define SHT_FINI_ARRAY 15
#define SHT_PREINIT_ARRAY 16
#define SHT_GROUP 17
#define SHT_SYMTAB_SHNDX 18
static const CUInt32PCharPair g_SectTypes[] =
{
{ 0, "NULL" },
{ 1, "PROGBITS" },
{ 2, "SYMTAB" },
{ 3, "STRTAB" },
{ 4, "RELA" },
{ 5, "HASH" },
{ 6, "DYNAMIC" },
{ 7, "NOTE" },
{ 8, "NOBITS" },
{ 9, "REL" },
{ 10, "SHLIB" },
{ 11, "DYNSYM" },
{ 12, "UNKNOWN12" },
{ 13, "UNKNOWN13" },
{ 14, "INIT_ARRAY" },
{ 15, "FINI_ARRAY" },
{ 16, "PREINIT_ARRAY" },
{ 17, "GROUP" },
{ 18, "SYMTAB_SHNDX" },
{ 0x6ffffff5, "GNU_ATTRIBUTES" },
{ 0x6ffffff6, "GNU_HASH" },
{ 0x6ffffffd, "GNU_verdef" },
{ 0x6ffffffe, "GNU_verneed" },
{ 0x6fffffff, "GNU_versym" },
// { 0x70000001, "X86_64_UNWIND" },
{ 0x70000001, "ARM_EXIDX" },
{ 0x70000002, "ARM_PREEMPTMAP" },
{ 0x70000003, "ARM_ATTRIBUTES" },
{ 0x70000004, "ARM_DEBUGOVERLAY" },
{ 0x70000005, "ARM_OVERLAYSECTION" }
};
static const CUInt32PCharPair g_SectionFlags[] =
{
{ 0, "WRITE" },
{ 1, "ALLOC" },
{ 2, "EXECINSTR" },
{ 4, "MERGE" },
{ 5, "STRINGS" },
{ 6, "INFO_LINK" },
{ 7, "LINK_ORDER" },
{ 8, "OS_NONCONFORMING" },
{ 9, "GROUP" },
{ 10, "TLS" },
{ 11, "CP_SECTION" },
{ 12, "DP_SECTION" },
{ 13, "XCORE_SHF_CP_SECTION" },
{ 28, "64_LARGE" },
};
struct CSection
{
UInt32 Name;
UInt32 Type;
UInt64 Flags;
UInt64 Va;
UInt64 Offset;
UInt64 VSize;
UInt32 Link;
UInt32 Info;
UInt64 AddrAlign;
UInt64 EntSize;
UInt64 GetSize() const { return Type == SHT_NOBITS ? 0 : VSize; }
void UpdateTotalSize(UInt64 &totalSize)
{
UInt64 t = Offset + GetSize();
if (totalSize < t)
totalSize = t;
}
bool Parse(const Byte *p, bool mode64, bool be);
};
bool CSection::Parse(const Byte *p, bool mode64, bool be)
{
G32(0, Name);
G32(4, Type);
if (mode64)
{
G64(0x08, Flags);
G64(0x10, Va);
G64(0x18, Offset);
G64(0x20, VSize);
G32(0x28, Link);
G32(0x2C, Info);
G64(0x30, AddrAlign);
G64(0x38, EntSize);
}
else
{
G32(0x08, Flags);
G32(0x0C, Va);
G32(0x10, Offset);
G32(0x14, VSize);
G32(0x18, Link);
G32(0x1C, Info);
G32(0x20, AddrAlign);
G32(0x24, EntSize);
}
if (EntSize >= ((UInt32)1 << 31))
return false;
if (EntSize >= ((UInt32)1 << 10) &&
EntSize >= VSize &&
VSize != 0)
return false;
return true;
}
static const char * const g_Machines[] =
{
"None"
, "AT&T WE 32100"
, "SPARC"
, "Intel 386"
, "Motorola 68000"
, "Motorola 88000"
, "Intel 486"
, "Intel i860"
, "MIPS"
, "IBM S/370"
, "MIPS RS3000 LE"
, "RS6000"
, NULL
, NULL
, NULL
, "PA-RISC"
, "nCUBE"
, "Fujitsu VPP500"
, "SPARC 32+"
, "Intel i960"
, "PowerPC"
, "PowerPC 64-bit"
, "IBM S/390"
, "SPU"
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, "NEX v800"
, "Fujitsu FR20"
, "TRW RH-32"
, "Motorola RCE"
, "ARM"
, "Alpha"
, "Hitachi SH"
, "SPARC-V9"
, "Siemens Tricore"
, "ARC"
, "H8/300"
, "H8/300H"
, "H8S"
, "H8/500"
, "IA-64"
, "Stanford MIPS-X"
, "Motorola ColdFire"
, "M68HC12"
, "Fujitsu MMA"
, "Siemens PCP"
, "Sony nCPU"
, "Denso NDR1"
, "Motorola StarCore"
, "Toyota ME16"
, "ST100"
, "Advanced Logic TinyJ"
, "AMD64"
, "Sony DSP"
, NULL
, NULL
, "Siemens FX66"
, "ST9+"
, "ST7"
, "MC68HC16"
, "MC68HC11"
, "MC68HC08"
, "MC68HC05"
, "Silicon Graphics SVx"
, "ST19"
, "Digital VAX"
, "Axis CRIS"
, "Infineon JAVELIN"
, "Element 14 FirePath"
, "LSI ZSP"
, "MMIX"
, "HUANY"
, "SiTera Prism"
, "Atmel AVR"
, "Fujitsu FR30"
, "Mitsubishi D10V"
, "Mitsubishi D30V"
, "NEC v850"
, "Mitsubishi M32R"
, "Matsushita MN10300"
, "Matsushita MN10200"
, "picoJava"
, "OpenRISC"
, "ARC Tangent-A5"
, "Tensilica Xtensa"
, "Alphamosaic VideoCore"
, "Thompson MM GPP"
, "National Semiconductor 32K"
, "Tenor Network TPC"
, "Trebia SNP 1000"
, "ST200"
, "Ubicom IP2xxx"
, "MAX"
, "NS CompactRISC"
, "Fujitsu F2MC16"
, "TI msp430"
, "Blackfin (DSP)"
, "SE S1C33"
, "Sharp embedded"
, "Arca RISC"
, "Unicore"
, "eXcess"
, "DXP"
, "Altera Nios II"
, "NS CRX"
, "Motorola XGATE"
, "Infineon C16x/XC16x"
, "Renesas M16C"
, "Microchip Technology dsPIC30F"
, "Freescale CE"
, "Renesas M32C"
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, "Altium TSK3000"
, "Freescale RS08"
, "Analog Devices SHARC"
, "Cyan Technology eCOG2"
, "Sunplus S+core7 RISC"
, "NJR 24-bit DSP"
, "Broadcom VideoCore III"
, "Lattice FPGA"
, "SE C17"
, "TI TMS320C6000"
, "TI TMS320C2000"
, "TI TMS320C55x"
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, "STM 64bit VLIW Data Signal"
, "Cypress M8C"
, "Renesas R32C"
, "NXP TriMedia"
, "Qualcomm Hexagon"
, "Intel 8051"
, "STMicroelectronics STxP7x"
, "Andes"
, "Cyan Technology eCOG1X"
, "Dallas Semiconductor MAXQ30"
, "NJR 16-bit DSP"
, "M2000"
, "Cray NV2"
, "Renesas RX"
, "Imagination Technologies META"
, "MCST Elbrus"
, "Cyan Technology eCOG16"
, "National Semiconductor CR16"
, "Freescale ETPUnit"
, "Infineon SLE9X"
, "Intel L10M"
, "Intel K10M"
, NULL
, "ARM64"
, NULL
, "Atmel AVR32"
, "STM8"
, "Tilera TILE64"
, "Tilera TILEPro"
, "Xilinx MicroBlaze"
, "NVIDIA CUDA"
, "Tilera TILE-Gx"
, "CloudShield"
, "KIPO-KAIST Core-A 1st"
, "KIPO-KAIST Core-A 2nd"
, "Synopsys ARCompact V2"
, "Open8"
, "Renesas RL78"
, "Broadcom VideoCore V"
, "Renesas 78KOR"
, "Freescale 56800EX" // 200
};
static const CUInt32PCharPair g_MachinePairs[] =
{
{ 47787, "Xilinx MicroBlaze" }
// { 0x9026, "Alpha" }
};
static const CUInt32PCharPair g_OS[] =
{
{ 0, "None" },
{ 1, "HP-UX" },
{ 2, "NetBSD" },
{ 3, "Linux" },
{ 4, "Hurd" },
{ 6, "Solaris" },
{ 7, "AIX" },
{ 8, "IRIX" },
{ 9, "FreeBSD" },
{ 10, "TRU64" },
{ 11, "Novell Modesto" },
{ 12, "OpenBSD" },
{ 13, "OpenVMS" },
{ 14, "HP NSK" },
{ 15, "AROS" },
{ 16, "FenixOS" },
{ 64, "Bare-metal TMS320C6000" },
{ 65, "Linux TMS320C6000" },
{ 97, "ARM" },
{ 255, "Standalone" }
};
#define k_Machine_MIPS 8
#define k_Machine_ARM 40
/*
#define EF_ARM_ABIMASK 0xFF000000
#define EF_ARM_BE8 0x00800000
#define EF_ARM_GCCMASK 0x00400FFF
#define EF_ARM_ABI_FLOAT_SOFT 0x00000200
#define EF_ARM_ABI_FLOAT_HARD 0x00000400
*/
static const CUInt32PCharPair g_ARM_Flags[] =
{
{ 1, "HasEntry" },
{ 9, "SF" },
{ 10, "HF" },
{ 23, "BE8" }
};
static const CUInt32PCharPair g_MIPS_Flags[] =
{
{ 0, "NOREORDER" },
{ 1, "PIC" },
{ 2, "CPIC" },
{ 3, "XGOT" },
{ 4, "64BIT_WHIRL" },
{ 5, "ABI2" },
{ 6, "ABI_ON32" },
{ 10, "NAN2008" },
{ 25, "MicroMIPS" },
{ 26, "M16" },
{ 27, "MDMX" }
};
#define ET_NONE 0
#define ET_REL 1
#define ET_EXEC 2
#define ET_DYN 3
#define ET_CORE 4
static const char * const g_Types[] =
{
"None"
, "Relocatable file"
, "Executable file"
, "Shared object file"
, "Core file"
};
class CHandler:
public IInArchive,
public IArchiveAllowTail,
public CMyUnknownImp
{
CRecordVector<CSegment> _segments;
CRecordVector<CSection> _sections;
CByteBuffer _namesData;
CMyComPtr<IInStream> _inStream;
UInt64 _totalSize;
CHeader _header;
bool _headersError;
bool _allowTail;
void GetSectionName(UInt32 index, NCOM::CPropVariant &prop, bool showNULL) const;
HRESULT Open2(IInStream *stream);
public:
MY_UNKNOWN_IMP2(IInArchive, IArchiveAllowTail)
INTERFACE_IInArchive(;)
STDMETHOD(AllowTail)(Int32 allowTail);
CHandler(): _allowTail(false) {}
};
void CHandler::GetSectionName(UInt32 index, NCOM::CPropVariant &prop, bool showNULL) const
{
if (index >= _sections.Size())
return;
const CSection &section = _sections[index];
UInt32 offset = section.Name;
if (index == SHN_UNDEF /* && section.Type == SHT_NULL && offset == 0 */)
{
if (showNULL)
prop = "NULL";
return;
}
const Byte *p = _namesData;
size_t size = _namesData.Size();
for (size_t i = offset; i < size; i++)
if (p[i] == 0)
{
prop = (const char *)(p + offset);
return;
}
}
static const Byte kArcProps[] =
{
kpidCpu,
kpidBit64,
kpidBigEndian,
kpidHostOS,
kpidCharacts,
kpidHeadersSize
};
enum
{
kpidLinkSection = kpidUserDefined,
kpidInfoSection
};
static const CStatProp kProps[] =
{
{ NULL, kpidPath, VT_BSTR },
{ NULL, kpidSize, VT_UI8 },
{ NULL, kpidVirtualSize, VT_UI8 },
{ NULL, kpidOffset, VT_UI8 },
{ NULL, kpidVa, VT_UI8 },
{ NULL, kpidType, VT_BSTR },
{ NULL, kpidCharacts, VT_BSTR }
, { "Link Section", kpidLinkSection, VT_BSTR}
, { "Info Section", kpidInfoSection, VT_BSTR}
};
IMP_IInArchive_Props_WITH_NAME
IMP_IInArchive_ArcProps
STDMETHODIMP CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value)
{
COM_TRY_BEGIN
NCOM::CPropVariant prop;
switch (propID)
{
case kpidPhySize: prop = _totalSize; break;
case kpidHeadersSize: prop = _header.GetHeadersSize(); break;
case kpidBit64: if (_header.Mode64) prop = _header.Mode64; break;
case kpidBigEndian: if (_header.Be) prop = _header.Be; break;
case kpidShortComment:
case kpidCpu:
{
AString s;
if (_header.Machine < ARRAY_SIZE(g_Machines))
{
const char *name = g_Machines[_header.Machine];
if (name)
s = name;
}
if (s.IsEmpty())
s = TypePairToString(g_MachinePairs, ARRAY_SIZE(g_MachinePairs), _header.Machine);
UInt32 flags = _header.Flags;
if (flags != 0)
{
s.Add_Space();
if (_header.Machine == k_Machine_ARM)
{
s += FlagsToString(g_ARM_Flags, ARRAY_SIZE(g_ARM_Flags), flags & (((UInt32)1 << 24) - 1));
s += " ABI:";
s.Add_UInt32(flags >> 24);
}
else if (_header.Machine == k_Machine_MIPS)
{
UInt32 ver = flags >> 28;
s += "v";
s.Add_UInt32(ver);
flags &= (((UInt32)1 << 28) - 1);
UInt32 abi = (flags >> 12) & 7;
if (abi != 0)
{
s += " ABI:";
s.Add_UInt32(abi);
}
flags &= ~((UInt32)7 << 12);
s.Add_Space();
s += FlagsToString(g_MIPS_Flags, ARRAY_SIZE(g_MIPS_Flags), flags);
}
else
{
char sz[16];
ConvertUInt32ToHex(flags, sz);
s += sz;
}
}
prop = s;
break;
}
case kpidHostOS: PAIR_TO_PROP(g_OS, _header.Os, prop); break;
case kpidCharacts: TYPE_TO_PROP(g_Types, _header.Type, prop); break;
case kpidExtension:
{
const char *s = NULL;
if (_header.Type == ET_DYN)
s = "so";
else if (_header.Type == ET_REL)
s = "o";
if (s)
prop = s;
break;
}
// case kpidIsSelfExe: prop = (_header.Type != ET_DYN) && (_header.Type == ET_REL); break;
case kpidErrorFlags:
{
UInt32 flags = 0;
if (_headersError) flags |= kpv_ErrorFlags_HeadersError;
if (flags != 0)
prop = flags;
break;
}
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *value)
{
COM_TRY_BEGIN
NCOM::CPropVariant prop;
if (index < _segments.Size())
{
const CSegment &item = _segments[index];
switch (propID)
{
case kpidPath:
{
char sz[16];
ConvertUInt32ToString(index, sz);
prop = sz;
break;
}
case kpidOffset: prop = item.Offset; break;
case kpidVa: prop = item.Va; break;
case kpidSize:
case kpidPackSize: prop = (UInt64)item.Size; break;
case kpidVirtualSize: prop = (UInt64)item.VSize; break;
case kpidType: TYPE_TO_PROP(g_SegnmentTypes, item.Type, prop); break;
case kpidCharacts: FLAGS_TO_PROP(g_SegmentFlags, item.Flags, prop); break;
}
}
else
{
index -= _segments.Size();
const CSection &item = _sections[index];
switch (propID)
{
case kpidPath: GetSectionName(index, prop, true); break;
case kpidOffset: prop = item.Offset; break;
case kpidVa: prop = item.Va; break;
case kpidSize:
case kpidPackSize: prop = (UInt64)(item.Type == SHT_NOBITS ? 0 : item.VSize); break;
case kpidVirtualSize: prop = item.GetSize(); break;
case kpidType: PAIR_TO_PROP(g_SectTypes, item.Type, prop); break;
case kpidCharacts: FLAGS_TO_PROP(g_SectionFlags, (UInt32)item.Flags, prop); break;
case kpidLinkSection: GetSectionName(item.Link, prop, false); break;
case kpidInfoSection: GetSectionName(item.Info, prop, false); break;
}
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
HRESULT CHandler::Open2(IInStream *stream)
{
const UInt32 kStartSize = kHeaderSize64;
Byte h[kStartSize];
RINOK(ReadStream_FALSE(stream, h, kStartSize));
if (h[0] != 0x7F || h[1] != 'E' || h[2] != 'L' || h[3] != 'F')
return S_FALSE;
if (!_header.Parse(h))
return S_FALSE;
_totalSize = _header.HeaderSize;
bool addSegments = false;
bool addSections = false;
if (_header.NumSections > 1)
addSections = true;
else
addSegments = true;
if (_header.NumSegments != 0)
{
if (_header.ProgOffset > (UInt64)1 << 60) return S_FALSE;
RINOK(stream->Seek(_header.ProgOffset, STREAM_SEEK_SET, NULL));
size_t size = (size_t)_header.SegmentEntrySize * _header.NumSegments;
CByteArr buf(size);
RINOK(ReadStream_FALSE(stream, buf, size));
UInt64 total = _header.ProgOffset + size;
if (_totalSize < total)
_totalSize = total;
const Byte *p = buf;
if (addSegments)
_segments.ClearAndReserve(_header.NumSegments);
for (unsigned i = 0; i < _header.NumSegments; i++, p += _header.SegmentEntrySize)
{
CSegment seg;
seg.Parse(p, _header.Mode64, _header.Be);
seg.UpdateTotalSize(_totalSize);
if (addSegments)
if (seg.Type != PT_PHDR)
_segments.AddInReserved(seg);
}
}
if (_header.NumSections != 0)
{
if (_header.SectOffset > (UInt64)1 << 60) return S_FALSE;
RINOK(stream->Seek(_header.SectOffset, STREAM_SEEK_SET, NULL));
size_t size = (size_t)_header.SectionEntrySize * _header.NumSections;
CByteArr buf(size);
RINOK(ReadStream_FALSE(stream, buf, size));
UInt64 total = _header.SectOffset + size;
if (_totalSize < total)
_totalSize = total;
const Byte *p = buf;
if (addSections)
_sections.ClearAndReserve(_header.NumSections);
for (unsigned i = 0; i < _header.NumSections; i++, p += _header.SectionEntrySize)
{
CSection sect;
if (!sect.Parse(p, _header.Mode64, _header.Be))
{
_headersError = true;
return S_FALSE;
}
sect.UpdateTotalSize(_totalSize);
if (addSections)
_sections.AddInReserved(sect);
}
}
if (addSections)
{
if (_header.NamesSectIndex < _sections.Size())
{
const CSection &sect = _sections[_header.NamesSectIndex];
UInt64 size = sect.GetSize();
if (size != 0
&& size < ((UInt64)1 << 31)
&& (Int64)sect.Offset >= 0)
{
_namesData.Alloc((size_t)size);
RINOK(stream->Seek(sect.Offset, STREAM_SEEK_SET, NULL));
RINOK(ReadStream_FALSE(stream, _namesData, (size_t)size));
}
}
/*
// we will not delete NULL sections, since we have links to section via indexes
for (int i = _sections.Size() - 1; i >= 0; i--)
if (_sections[i].Type == SHT_NULL)
_items.Delete(i);
*/
}
if (!_allowTail)
{
UInt64 fileSize;
RINOK(stream->Seek(0, STREAM_SEEK_END, &fileSize));
if (fileSize > _totalSize)
return S_FALSE;
}
return S_OK;
}
STDMETHODIMP CHandler::Open(IInStream *inStream,
const UInt64 * /* maxCheckStartPosition */,
IArchiveOpenCallback * /* openArchiveCallback */)
{
COM_TRY_BEGIN
Close();
RINOK(Open2(inStream));
_inStream = inStream;
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::Close()
{
_totalSize = 0;
_headersError = false;
_inStream.Release();
_segments.Clear();
_sections.Clear();
_namesData.Free();
return S_OK;
}
STDMETHODIMP CHandler::GetNumberOfItems(UInt32 *numItems)
{
*numItems = _segments.Size() + _sections.Size();
return S_OK;
}
STDMETHODIMP CHandler::Extract(const UInt32 *indices, UInt32 numItems,
Int32 testMode, IArchiveExtractCallback *extractCallback)
{
COM_TRY_BEGIN
bool allFilesMode = (numItems == (UInt32)(Int32)-1);
if (allFilesMode)
numItems = _segments.Size() + _sections.Size();
if (numItems == 0)
return S_OK;
UInt64 totalSize = 0;
UInt32 i;
for (i = 0; i < numItems; i++)
{
UInt32 index = allFilesMode ? i : indices[i];
totalSize += (index < _segments.Size()) ?
_segments[index].Size :
_sections[index - _segments.Size()].GetSize();
}
extractCallback->SetTotal(totalSize);
UInt64 currentTotalSize = 0;
UInt64 currentItemSize;
NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder();
CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;
CLocalProgress *lps = new CLocalProgress;
CMyComPtr<ICompressProgressInfo> progress = lps;
lps->Init(extractCallback, false);
CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
CMyComPtr<ISequentialInStream> inStream(streamSpec);
streamSpec->SetStream(_inStream);
for (i = 0; i < numItems; i++, currentTotalSize += currentItemSize)
{
lps->InSize = lps->OutSize = currentTotalSize;
RINOK(lps->SetCur());
Int32 askMode = testMode ?
NExtract::NAskMode::kTest :
NExtract::NAskMode::kExtract;
UInt32 index = allFilesMode ? i : indices[i];
UInt64 offset;
if (index < _segments.Size())
{
const CSegment &item = _segments[index];
currentItemSize = item.Size;
offset = item.Offset;
}
else
{
const CSection &item = _sections[index - _segments.Size()];
currentItemSize = item.GetSize();
offset = item.Offset;
}
CMyComPtr<ISequentialOutStream> outStream;
RINOK(extractCallback->GetStream(index, &outStream, askMode));
if (!testMode && !outStream)
continue;
RINOK(extractCallback->PrepareOperation(askMode));
RINOK(_inStream->Seek(offset, STREAM_SEEK_SET, NULL));
streamSpec->Init(currentItemSize);
RINOK(copyCoder->Code(inStream, outStream, NULL, NULL, progress));
outStream.Release();
RINOK(extractCallback->SetOperationResult(copyCoderSpec->TotalSize == currentItemSize ?
NExtract::NOperationResult::kOK:
NExtract::NOperationResult::kDataError));
}
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::AllowTail(Int32 allowTail)
{
_allowTail = IntToBool(allowTail);
return S_OK;
}
static const Byte k_Signature[] = { 0x7F, 'E', 'L', 'F' };
REGISTER_ARC_I(
"ELF", "elf", 0, 0xDE,
k_Signature,
0,
NArcInfoFlags::kPreArc,
NULL)
}}
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