abi.cpp

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#include "abi.h"

#include <utils/fileutils.h>

#include <QDebug>
#include <QtEndian>
#include <QFile>
#include <QRegExp>
#include <QString>
#include <QStringList>
#include <QSysInfo>

/*!
    \class ProjectExplorer::Abi

    \brief The Abi class represents the Application Binary Interface (ABI) of
    a target platform.

    \sa ProjectExplorer::ToolChain
*/

namespace ProjectExplorer {

// --------------------------------------------------------------------------
// Helpers
// --------------------------------------------------------------------------

static quint8 getUint8(const QByteArray &data, int pos)
{
    return static_cast<quint8>(data.at(pos));
}

static quint32 getLEUint32(const QByteArray &ba, int pos)
{
    Q_ASSERT(ba.size() >= pos + 3);
    return (static_cast<quint32>(static_cast<quint8>(ba.at(pos + 3))) << 24)
            + (static_cast<quint32>(static_cast<quint8>(ba.at(pos + 2)) << 16))
            + (static_cast<quint32>(static_cast<quint8>(ba.at(pos + 1))) << 8)
            + static_cast<quint8>(ba.at(pos));
}

static quint32 getBEUint32(const QByteArray &ba, int pos)
{
    Q_ASSERT(ba.size() >= pos + 3);
    return (static_cast<quint32>(static_cast<quint8>(ba.at(pos))) << 24)
            + (static_cast<quint32>(static_cast<quint8>(ba.at(pos + 1))) << 16)
            + (static_cast<quint32>(static_cast<quint8>(ba.at(pos + 2))) << 8)
            + static_cast<quint8>(ba.at(pos + 3));
}

static quint32 getLEUint16(const QByteArray &ba, int pos)
{
    Q_ASSERT(ba.size() >= pos + 1);
    return (static_cast<quint16>(static_cast<quint8>(ba.at(pos + 1))) << 8) + static_cast<quint8>(ba.at(pos));
}

static quint32 getBEUint16(const QByteArray &ba, int pos)
{
    Q_ASSERT(ba.size() >= pos + 1);
    return (static_cast<quint16>(static_cast<quint8>(ba.at(pos))) << 8) + static_cast<quint8>(ba.at(pos + 1));
}

static Abi macAbiForCpu(quint32 type) {
    switch (type) {
    case 7: // CPU_TYPE_X86, CPU_TYPE_I386
        return Abi(Abi::X86Architecture, Abi::DarwinOS, Abi::GenericDarwinFlavor, Abi::MachOFormat, 32);
    case 0x01000000 +  7: // CPU_TYPE_X86_64
        return Abi(Abi::X86Architecture, Abi::DarwinOS, Abi::GenericDarwinFlavor, Abi::MachOFormat, 64);
    case 18: // CPU_TYPE_POWERPC
        return Abi(Abi::PowerPCArchitecture, Abi::DarwinOS, Abi::GenericDarwinFlavor, Abi::MachOFormat, 32);
    case 0x01000000 + 18: // CPU_TYPE_POWERPC64
        return Abi(Abi::PowerPCArchitecture, Abi::DarwinOS, Abi::GenericDarwinFlavor, Abi::MachOFormat, 32);
    case 12: // CPU_TYPE_ARM
        return Abi(Abi::ArmArchitecture, Abi::DarwinOS, Abi::GenericDarwinFlavor, Abi::MachOFormat, 32);
    case 0x01000000 + 12: // CPU_TYPE_ARM64
        return Abi(Abi::ArmArchitecture, Abi::DarwinOS, Abi::GenericDarwinFlavor, Abi::MachOFormat, 64);
    default:
        return Abi();
    }
}

static QList<Abi> parseCoffHeader(const QByteArray &data)
{
    QList<Abi> result;
    if (data.size() < 20)
        return result;

    Abi::Architecture arch = Abi::UnknownArchitecture;
    Abi::OSFlavor flavor = Abi::UnknownFlavor;
    int width = 0;

    // Get machine field from COFF file header
    quint16 machine = getLEUint16(data, 0);
    switch (machine) {
    case 0x01c0: // ARM LE
    case 0x01c2: // ARM or thumb
    case 0x01c4: // ARMv7 thumb
        arch = Abi::ArmArchitecture;
        width = 32;
        break;
    case 0x8664: // x86_64
        arch = Abi::X86Architecture;
        width = 64;
        break;
    case 0x014c: // i386
        arch = Abi::X86Architecture;
        width = 32;
        break;
    case 0x0166: // MIPS, little endian
        arch = Abi::MipsArchitecture;
        width = 32;
        break;
    case 0x0200: // ia64
        arch = Abi::ItaniumArchitecture;
        width = 64;
        break;
    }

    if (data.size() >= 24) {
        // Get Major and Minor Image Version from optional header fields
        quint8 minorLinker = data.at(23);
        switch (data.at(22)) {
        case 2:
        case 3: // not yet reached:-)
            flavor = Abi::WindowsMSysFlavor;
            break;
        case 8:
            flavor = Abi::WindowsMsvc2005Flavor;
            break;
        case 9:
            flavor = Abi::WindowsMsvc2008Flavor;
            break;
        case 10:
            flavor = Abi::WindowsMsvc2010Flavor;
            break;
        case 11:
            flavor = Abi::WindowsMsvc2012Flavor;
            break;
        case 12:
            flavor = Abi::WindowsMsvc2013Flavor;
            break;
        case 14:
            flavor = minorLinker >= quint8(10)
                ? Abi::WindowsMsvc2017Flavor // MSVC2017 RC
                : Abi::WindowsMsvc2015Flavor;
            break;
        case 15:
            flavor = Abi::WindowsMsvc2017Flavor;
            break;
        default: // Keep unknown flavor
            if (minorLinker != 0)
                flavor = Abi::WindowsMSysFlavor; // MSVC seems to avoid using minor numbers
            else
                qWarning("%s: Unknown MSVC flavour encountered.", Q_FUNC_INFO);
            break;
        }
    }

    if (arch != Abi::UnknownArchitecture && width != 0)
        result.append(Abi(arch, Abi::WindowsOS, flavor, Abi::PEFormat, width));

    return result;
}

static QList<Abi> abiOf(const QByteArray &data)
{
    QList<Abi> result;
    if (data.size() <= 8)
        return result;

    if (data.size() >= 20
            && getUint8(data, 0) == 0x7f && getUint8(data, 1) == 'E' && getUint8(data, 2) == 'L'
            && getUint8(data, 3) == 'F') {
        // ELF format:
        bool isLE = (getUint8(data, 5) == 1);
        quint16 machine = isLE ? getLEUint16(data, 18) : getBEUint16(data, 18);
        quint8 osAbi = getUint8(data, 7);

        Abi::OS os = Abi::UnixOS;
        Abi::OSFlavor flavor = Abi::GenericUnixFlavor;
        // http://www.sco.com/developers/gabi/latest/ch4.eheader.html#elfid
        switch (osAbi) {
#if defined(Q_OS_NETBSD)
        case 0: // NetBSD: ELFOSABI_NETBSD  2, however, NetBSD uses 0
            os = Abi::BsdOS;
            flavor = Abi::NetBsdFlavor;
            break;
#elif defined(Q_OS_OPENBSD)
        case 0: // OpenBSD: ELFOSABI_OPENBSD 12, however, OpenBSD uses 0
            os = Abi::BsdOS;
            flavor = Abi::OpenBsdFlavor;
            break;
#else
        case 0: // no extra info available: Default to Linux:
#endif
        case 3: // Linux:
        case 97: // ARM, also linux most of the time.
            os = Abi::LinuxOS;
            flavor = Abi::GenericLinuxFlavor;
            break;
        case 6: // Solaris:
            os = Abi::UnixOS;
            flavor = Abi::SolarisUnixFlavor;
            break;
        case 9: // FreeBSD:
            os = Abi::BsdOS;
            flavor = Abi::FreeBsdFlavor;
            break;
        }

        switch (machine) {
        case 3: // EM_386
            result.append(Abi(Abi::X86Architecture, os, flavor, Abi::ElfFormat, 32));
            break;
        case 8: // EM_MIPS
            result.append(Abi(Abi::MipsArchitecture, os, flavor, Abi::ElfFormat, 32));
            break;
        case 20: // EM_PPC
            result.append(Abi(Abi::PowerPCArchitecture, os, flavor, Abi::ElfFormat, 32));
            break;
        case 21: // EM_PPC64
            result.append(Abi(Abi::PowerPCArchitecture, os, flavor, Abi::ElfFormat, 64));
            break;
        case 40: // EM_ARM
            result.append(Abi(Abi::ArmArchitecture, os, flavor, Abi::ElfFormat, 32));
            break;
        case 183: // EM_AARCH64
            result.append(Abi(Abi::ArmArchitecture, os, flavor, Abi::ElfFormat, 64));
            break;
        case 62: // EM_X86_64
            result.append(Abi(Abi::X86Architecture, os, flavor, Abi::ElfFormat, 64));
            break;
        case 42: // EM_SH
            result.append(Abi(Abi::ShArchitecture, os, flavor, Abi::ElfFormat, 32));
            break;
        case 50: // EM_IA_64
            result.append(Abi(Abi::ItaniumArchitecture, os, flavor, Abi::ElfFormat, 64));
            break;
        default:
            ;
        }
    } else if (((getUint8(data, 0) == 0xce || getUint8(data, 0) == 0xcf)
             && getUint8(data, 1) == 0xfa && getUint8(data, 2) == 0xed && getUint8(data, 3) == 0xfe
            )
            ||
            (getUint8(data, 0) == 0xfe && getUint8(data, 1) == 0xed && getUint8(data, 2) == 0xfa
             && (getUint8(data, 3) == 0xce || getUint8(data, 3) == 0xcf)
            )
           ) {
            // Mach-O format (Mac non-fat binary, 32 and 64bit magic):
            quint32 type = (getUint8(data, 1) ==  0xfa) ? getLEUint32(data, 4) : getBEUint32(data, 4);
            result.append(macAbiForCpu(type));
    } else if ((getUint8(data, 0) == 0xbe && getUint8(data, 1) == 0xba
                && getUint8(data, 2) == 0xfe && getUint8(data, 3) == 0xca)
               ||
               (getUint8(data, 0) == 0xca && getUint8(data, 1) == 0xfe
                && getUint8(data, 2) == 0xba && getUint8(data, 3) == 0xbe)
              ) {
        // Mach-0 format Fat binary header:
        bool isLE = (getUint8(data, 0) == 0xbe);
        quint32 count = isLE ? getLEUint32(data, 4) : getBEUint32(data, 4);
        int pos = 8;
        for (quint32 i = 0; i < count; ++i) {
            if (data.size() <= pos + 4)
                break;

            quint32 type = isLE ? getLEUint32(data, pos) : getBEUint32(data, pos);
            result.append(macAbiForCpu(type));
            pos += 20;
        }
    } else if (data.size() >= 64){
        // Windows PE: values are LE (except for a few exceptions which we will not use here).

        // MZ header first (ZM is also allowed, but rarely used)
        const quint8 firstChar = getUint8(data, 0);
        const quint8 secondChar = getUint8(data, 1);
        if ((firstChar != 'M' || secondChar != 'Z') && (firstChar != 'Z' || secondChar != 'M'))
            return result;

        // Get PE/COFF header position from MZ header:
        qint32 pePos = getLEUint32(data, 60);
        if (pePos <= 0 || data.size() < pePos + 4 + 20) // PE magic bytes plus COFF header
            return result;
        if (getUint8(data, pePos) == 'P' && getUint8(data, pePos + 1) == 'E'
            && getUint8(data, pePos + 2) == 0 && getUint8(data, pePos + 3) == 0)
            result = parseCoffHeader(data.mid(pePos + 4));
    }
    return result;
}

// --------------------------------------------------------------------------
// Abi
// --------------------------------------------------------------------------

Abi::Abi(const Architecture &a, const OS &o,
         const OSFlavor &of, const BinaryFormat &f, unsigned char w) :
    m_architecture(a), m_os(o), m_osFlavor(of), m_binaryFormat(f), m_wordWidth(w)
{
    switch (m_os) {
    case Abi::UnknownOS:
        m_osFlavor = UnknownFlavor;
        break;
    case Abi::LinuxOS:
        if (m_osFlavor < GenericLinuxFlavor || m_osFlavor > AndroidLinuxFlavor)
            m_osFlavor = UnknownFlavor;
        break;
    case Abi::BsdOS:
        if (m_osFlavor < FreeBsdFlavor || m_osFlavor > OpenBsdFlavor)
            m_osFlavor = UnknownFlavor;
        break;
    case Abi::DarwinOS:
        if (m_osFlavor < GenericDarwinFlavor || m_osFlavor > GenericDarwinFlavor)
            m_osFlavor = UnknownFlavor;
        break;
    case Abi::UnixOS:
        if (m_osFlavor < GenericUnixFlavor || m_osFlavor > SolarisUnixFlavor)
            m_osFlavor = UnknownFlavor;
        break;
    case Abi::WindowsOS:
        if (m_osFlavor < WindowsMsvc2005Flavor || m_osFlavor > WindowsCEFlavor)
            m_osFlavor = UnknownFlavor;
        break;
    case Abi::VxWorks:
        if (m_osFlavor != VxWorksFlavor)
            m_osFlavor = VxWorksFlavor;
        break;
    case Abi::QnxOS:
        if (m_osFlavor != GenericQnxFlavor)
            m_osFlavor = UnknownFlavor;
        break;
    }
}

Abi::Abi(const QString &abiString) :
    m_architecture(UnknownArchitecture), m_os(UnknownOS),
    m_osFlavor(UnknownFlavor), m_binaryFormat(UnknownFormat), m_wordWidth(0)
{
    const QVector<QStringRef> abiParts = abiString.splitRef(QLatin1Char('-'));
    if (abiParts.count() >= 1) {
        if (abiParts.at(0) == QLatin1String("unknown"))
            m_architecture = UnknownArchitecture;
        else if (abiParts.at(0) == QLatin1String("arm"))
            m_architecture = ArmArchitecture;
        else if (abiParts.at(0) == QLatin1String("aarch64"))
            m_architecture = ArmArchitecture;
        else if (abiParts.at(0) == QLatin1String("x86"))
            m_architecture = X86Architecture;
        else if (abiParts.at(0) == QLatin1String("mips"))
            m_architecture = MipsArchitecture;
        else if (abiParts.at(0) == QLatin1String("ppc"))
            m_architecture = PowerPCArchitecture;
        else if (abiParts.at(0) == QLatin1String("itanium"))
            m_architecture = ItaniumArchitecture;
        else if (abiParts.at(0) == QLatin1String("sh"))
            m_architecture = ShArchitecture;
        else
            return;
    }

    if (abiParts.count() >= 2) {
        if (abiParts.at(1) == QLatin1String("unknown"))
            m_os = UnknownOS;
        else if (abiParts.at(1) == QLatin1String("linux"))
            m_os = LinuxOS;
        else if (abiParts.at(1) == QLatin1String("bsd"))
            m_os = BsdOS;
        else if (abiParts.at(1) == QLatin1String("darwin")
                || abiParts.at(1) == QLatin1String("macos"))
            m_os = DarwinOS;
        else if (abiParts.at(1) == QLatin1String("unix"))
            m_os = UnixOS;
        else if (abiParts.at(1) == QLatin1String("windows"))
            m_os = WindowsOS;
        else if (abiParts.at(1) == QLatin1String("vxworks"))
            m_os = VxWorks;
        else if (abiParts.at(1) == QLatin1String("qnx"))
            m_os = QnxOS;
        else
            return;
    }

    if (abiParts.count() >= 3) {
        if (abiParts.at(2) == QLatin1String("unknown"))
            m_osFlavor = UnknownFlavor;
        else if (abiParts.at(2) == QLatin1String("generic") && m_os == LinuxOS)
            m_osFlavor = GenericLinuxFlavor;
        else if (abiParts.at(2) == QLatin1String("android") && m_os == LinuxOS)
            m_osFlavor = AndroidLinuxFlavor;
        else if (abiParts.at(2) == QLatin1String("generic") && m_os == QnxOS)
            m_osFlavor = GenericQnxFlavor;
        else if (abiParts.at(2) == QLatin1String("freebsd") && m_os == BsdOS)
            m_osFlavor = FreeBsdFlavor;
        else if (abiParts.at(2) == QLatin1String("netbsd") && m_os == BsdOS)
            m_osFlavor = NetBsdFlavor;
        else if (abiParts.at(2) == QLatin1String("openbsd") && m_os == BsdOS)
            m_osFlavor = OpenBsdFlavor;
        else if (abiParts.at(2) == QLatin1String("generic") && m_os == DarwinOS)
            m_osFlavor = GenericDarwinFlavor;
        else if (abiParts.at(2) == QLatin1String("generic") && m_os == UnixOS)
            m_osFlavor = GenericUnixFlavor;
        else if (abiParts.at(2) == QLatin1String("solaris") && m_os == UnixOS)
            m_osFlavor = SolarisUnixFlavor;
        else if (abiParts.at(2) == QLatin1String("msvc2005") && m_os == WindowsOS)
            m_osFlavor = WindowsMsvc2005Flavor;
        else if (abiParts.at(2) == QLatin1String("msvc2008") && m_os == WindowsOS)
            m_osFlavor = WindowsMsvc2008Flavor;
        else if (abiParts.at(2) == QLatin1String("msvc2010") && m_os == WindowsOS)
            m_osFlavor = WindowsMsvc2010Flavor;
        else if (abiParts.at(2) == QLatin1String("msvc2012") && m_os == WindowsOS)
            m_osFlavor = WindowsMsvc2012Flavor;
        else if (abiParts.at(2) == QLatin1String("msvc2013") && m_os == WindowsOS)
            m_osFlavor = WindowsMsvc2013Flavor;
        else if (abiParts.at(2) == QLatin1String("msvc2015") && m_os == WindowsOS)
            m_osFlavor = WindowsMsvc2015Flavor;
        else if (abiParts.at(2) == QLatin1String("msvc2017") && m_os == WindowsOS)
            m_osFlavor = WindowsMsvc2017Flavor;
        else if (abiParts.at(2) == QLatin1String("msys") && m_os == WindowsOS)
            m_osFlavor = WindowsMSysFlavor;
        else if (abiParts.at(2) == QLatin1String("ce") && m_os == WindowsOS)
            m_osFlavor = WindowsCEFlavor;
        else if (abiParts.at(2) == QLatin1String("vxworks") && m_os == VxWorks)
            m_osFlavor = VxWorksFlavor;
        else
            return;
    }

    if (abiParts.count() >= 4) {
        if (abiParts.at(3) == QLatin1String("unknown"))
            m_binaryFormat = UnknownFormat;
        else if (abiParts.at(3) == QLatin1String("elf"))
            m_binaryFormat = ElfFormat;
        else if (abiParts.at(3) == QLatin1String("pe"))
            m_binaryFormat = PEFormat;
        else if (abiParts.at(3) == QLatin1String("mach_o"))
            m_binaryFormat = MachOFormat;
        else if (abiParts.at(3) == QLatin1String("qml_rt"))
            m_binaryFormat = RuntimeQmlFormat;
        else
            return;
    }

    if (abiParts.count() >= 5) {
        const QStringRef &bits = abiParts.at(4);
        if (!bits.endsWith(QLatin1String("bit")))
            return;

        bool ok = false;
        const QStringRef number =
            bits.string()->midRef(bits.position(), bits.count() - 3);
        const int bitCount = number.toInt(&ok);
        if (!ok)
            return;
        if (bitCount != 8 && bitCount != 16 && bitCount != 32 && bitCount != 64)
            return;
        m_wordWidth = bitCount;
    }
}

Abi Abi::abiFromTargetTriplet(const QString &triple)
{
    QString machine = triple.toLower();
    if (machine.isEmpty())
        return Abi();

    const QVector<QStringRef> parts = machine.splitRef(QRegExp(QLatin1String("[ /-]")));

    Abi::Architecture arch = Abi::UnknownArchitecture;
    Abi::OS os = Abi::UnknownOS;
    Abi::OSFlavor flavor = Abi::UnknownFlavor;
    Abi::BinaryFormat format = Abi::UnknownFormat;
    unsigned char width = 0;
    int unknownCount = 0;

    for (const QStringRef &p : parts) {
        if (p == QLatin1String("unknown") || p == QLatin1String("pc") || p == QLatin1String("none")
                || p == QLatin1String("gnu") || p == QLatin1String("uclibc")
                || p == QLatin1String("86_64") || p == QLatin1String("redhat")
                || p == QLatin1String("gnueabi") || p == QLatin1String("w64")) {
            continue;
        } else if (p == QLatin1String("i386") || p == QLatin1String("i486") || p == QLatin1String("i586")
                   || p == QLatin1String("i686") || p == QLatin1String("x86")) {
            arch = Abi::X86Architecture;
            width = 32;
        } else if (p.startsWith(QLatin1String("arm"))) {
            arch = Abi::ArmArchitecture;
            width = p.contains(QLatin1String("64")) ? 64 : 32;
        } else if (p.startsWith(QLatin1String("aarch64"))) {
            arch = Abi::ArmArchitecture;
            width = 64;
        } else if (p.startsWith(QLatin1String("mips"))) {
            arch = Abi::MipsArchitecture;
            width = p.contains(QLatin1String("64")) ? 64 : 32;
        } else if (p == QLatin1String("x86_64") || p == QLatin1String("amd64")) {
            arch = Abi::X86Architecture;
            width = 64;
        } else if (p == QLatin1String("powerpc64")) {
            arch = Abi::PowerPCArchitecture;
            width = 64;
        } else if (p == QLatin1String("powerpc")) {
            arch = Abi::PowerPCArchitecture;
            width = 32;
        } else if (p == QLatin1String("linux") || p == QLatin1String("linux6e")) {
            os = Abi::LinuxOS;
            if (flavor == Abi::UnknownFlavor)
                flavor = Abi::GenericLinuxFlavor;
            format = Abi::ElfFormat;
        } else if (p == QLatin1String("android")) {
            flavor = Abi::AndroidLinuxFlavor;
        } else if (p == QLatin1String("androideabi")) {
            flavor = Abi::AndroidLinuxFlavor;
        } else if (p.startsWith(QLatin1String("freebsd"))) {
            os = Abi::BsdOS;
            if (flavor == Abi::UnknownFlavor)
                flavor = Abi::FreeBsdFlavor;
            format = Abi::ElfFormat;
        } else if (p.startsWith(QLatin1String("openbsd"))) {
            os = Abi::BsdOS;
            if (flavor == Abi::UnknownFlavor)
                flavor = Abi::OpenBsdFlavor;
            format = Abi::ElfFormat;
        } else if (p == QLatin1String("mingw32") || p == QLatin1String("win32")
                   || p == QLatin1String("mingw32msvc") || p == QLatin1String("msys")
                   || p == QLatin1String("cygwin") || p == QLatin1String("windows")) {
            arch = Abi::X86Architecture;
            os = Abi::WindowsOS;
            flavor = Abi::WindowsMSysFlavor;
            format = Abi::PEFormat;
        } else if (p == QLatin1String("apple")) {
            os = Abi::DarwinOS;
            flavor = Abi::GenericDarwinFlavor;
            format = Abi::MachOFormat;
        } else if (p == QLatin1String("darwin10")) {
            width = 64;
        } else if (p == QLatin1String("darwin9")) {
            width = 32;
        } else if (p == QLatin1String("gnueabi")) {
            format = Abi::ElfFormat;
        } else if (p == QLatin1String("wrs")) {
            continue;
        } else if (p == QLatin1String("vxworks")) {
            os = Abi::VxWorks;
            flavor = Abi::VxWorksFlavor;
            format = Abi::ElfFormat;
        } else if (p.startsWith(QLatin1String("qnx"))) {
            os = Abi::QnxOS;
            flavor = Abi::GenericQnxFlavor;
            format = Abi::ElfFormat;
        } else {
            ++unknownCount;
        }
    }

    return Abi(arch, os, flavor, format, width);
}

QString Abi::toString() const
{
    QStringList dn;
    dn << toString(m_architecture);
    dn << toString(m_os);
    dn << toString(m_osFlavor);
    dn << toString(m_binaryFormat);
    dn << toString(m_wordWidth);

    return dn.join(QLatin1Char('-'));
}

bool Abi::operator != (const Abi &other) const
{
    return !operator ==(other);
}

bool Abi::operator == (const Abi &other) const
{
    return m_architecture == other.m_architecture
            && m_os == other.m_os
            && m_osFlavor == other.m_osFlavor
            && m_binaryFormat == other.m_binaryFormat
            && m_wordWidth == other.m_wordWidth;
}

bool Abi::isCompatibleWith(const Abi &other) const
{
    // Generic match: If stuff is identical or the other side is unknown, then this is a match.
    bool isCompat = (architecture() == other.architecture() || other.architecture() == UnknownArchitecture)
                     && (os() == other.os() || other.os() == UnknownOS)
                     && (osFlavor() == other.osFlavor() || other.osFlavor() == UnknownFlavor)
                     && (binaryFormat() == other.binaryFormat() || other.binaryFormat() == UnknownFormat)
                     && ((wordWidth() == other.wordWidth() && wordWidth() != 0) || other.wordWidth() == 0);

    // *-linux-generic-* is compatible with *-linux-* (both ways): This is for the benefit of
    // people building Qt themselves using e.g. a meego toolchain.
    //
    // We leave it to the specific targets to filter out the tool chains that do not
    // work for them.
    if (!isCompat && (architecture() == other.architecture() || other.architecture() == UnknownArchitecture)
                  && ((os() == other.os()) && (os() == LinuxOS))
                  && (osFlavor() == GenericLinuxFlavor || other.osFlavor() == GenericLinuxFlavor)
                  && (binaryFormat() == other.binaryFormat() || other.binaryFormat() == UnknownFormat)
                  && ((wordWidth() == other.wordWidth() && wordWidth() != 0) || other.wordWidth() == 0)) {
        isCompat = true;
    }

    // Make Android matching more strict than the generic Linux matches so far:
    if (isCompat && (osFlavor() == AndroidLinuxFlavor || other.osFlavor() == AndroidLinuxFlavor))
        isCompat = (architecture() == other.architecture()) &&  (osFlavor() == other.osFlavor());

    // MSVC2017 is compatible with MSVC2015
    if (!isCompat
            && ((osFlavor() == WindowsMsvc2015Flavor && other.osFlavor() == WindowsMsvc2017Flavor)
                || (osFlavor() == WindowsMsvc2017Flavor && other.osFlavor() == WindowsMsvc2015Flavor))) {
        isCompat = true;
    }
    return isCompat;
}

bool Abi::isValid() const
{
    return m_architecture != UnknownArchitecture
            && m_os != UnknownOS
            && m_osFlavor != UnknownFlavor
            && m_binaryFormat != UnknownFormat
            && m_wordWidth != 0;
}

bool Abi::isNull() const
{
    return m_architecture == UnknownArchitecture
            && m_os == UnknownOS
            && m_osFlavor == UnknownFlavor
            && m_binaryFormat == UnknownFormat
            && m_wordWidth == 0;
}

QString Abi::toString(const Architecture &a)
{
    switch (a) {
    case ArmArchitecture:
        return QLatin1String("arm");
    case X86Architecture:
        return QLatin1String("x86");
    case MipsArchitecture:
        return QLatin1String("mips");
    case PowerPCArchitecture:
        return QLatin1String("ppc");
    case ItaniumArchitecture:
        return QLatin1String("itanium");
    case ShArchitecture:
        return QLatin1String("sh");
    case UnknownArchitecture: // fall through!
    default:
        return QLatin1String("unknown");
    }
}

QString Abi::toString(const OS &o)
{
    switch (o) {
    case LinuxOS:
        return QLatin1String("linux");
    case BsdOS:
        return QLatin1String("bsd");
    case DarwinOS:
        return QLatin1String("darwin");
    case UnixOS:
        return QLatin1String("unix");
    case WindowsOS:
        return QLatin1String("windows");
    case VxWorks:
        return QLatin1String("vxworks");
    case QnxOS:
        return QLatin1String("qnx");
    case UnknownOS: // fall through!
    default:
        return QLatin1String("unknown");
    };
}

QString Abi::toString(const OSFlavor &of)
{
    switch (of) {
    case Abi::GenericLinuxFlavor:
        return QLatin1String("generic");
    case Abi::AndroidLinuxFlavor:
        return QLatin1String("android");
    case Abi::FreeBsdFlavor:
        return QLatin1String("freebsd");
    case Abi::NetBsdFlavor:
        return QLatin1String("netbsd");
    case Abi::OpenBsdFlavor:
        return QLatin1String("openbsd");
    case Abi::GenericDarwinFlavor:
        return QLatin1String("generic");
    case Abi::GenericUnixFlavor:
        return QLatin1String("generic");
    case Abi::SolarisUnixFlavor:
        return QLatin1String("solaris");
    case Abi::WindowsMsvc2005Flavor:
        return QLatin1String("msvc2005");
    case Abi::WindowsMsvc2008Flavor:
        return QLatin1String("msvc2008");
    case Abi::WindowsMsvc2010Flavor:
        return QLatin1String("msvc2010");
    case Abi::WindowsMsvc2012Flavor:
        return QLatin1String("msvc2012");
    case Abi::WindowsMsvc2013Flavor:
        return QLatin1String("msvc2013");
    case Abi::WindowsMsvc2015Flavor:
        return QLatin1String("msvc2015");
    case Abi::WindowsMsvc2017Flavor:
        return QLatin1String("msvc2017");
    case Abi::WindowsMSysFlavor:
        return QLatin1String("msys");
    case Abi::WindowsCEFlavor:
        return QLatin1String("ce");
    case Abi::VxWorksFlavor:
        return QLatin1String("vxworks");
    case Abi::GenericQnxFlavor:
        return QLatin1String("generic");
    case Abi::UnknownFlavor: // fall through!
    default:
        return QLatin1String("unknown");
    }
}

QString Abi::toString(const BinaryFormat &bf)
{
    switch (bf) {
    case ElfFormat:
        return QLatin1String("elf");
    case PEFormat:
        return QLatin1String("pe");
    case MachOFormat:
        return QLatin1String("mach_o");
    case RuntimeQmlFormat:
        return QLatin1String("qml_rt");
    case UnknownFormat: // fall through!
    default:
        return QLatin1String("unknown");
    }
}

QString Abi::toString(int w)
{
    if (w == 0)
        return QLatin1String("unknown");
    return QString::fromLatin1("%1bit").arg(w);
}

QList<Abi::OSFlavor> Abi::flavorsForOs(const Abi::OS &o)
{
    QList<OSFlavor> result;
    switch (o) {
    case BsdOS:
        return result << FreeBsdFlavor << OpenBsdFlavor << NetBsdFlavor << UnknownFlavor;
    case LinuxOS:
        return result << GenericLinuxFlavor << AndroidLinuxFlavor << UnknownFlavor;
    case DarwinOS:
        return result << GenericDarwinFlavor << UnknownFlavor;
    case UnixOS:
        return result << GenericUnixFlavor << SolarisUnixFlavor << UnknownFlavor;
    case WindowsOS:
        return result << WindowsMsvc2005Flavor << WindowsMsvc2008Flavor << WindowsMsvc2010Flavor
                      << WindowsMsvc2012Flavor << WindowsMsvc2013Flavor << WindowsMsvc2015Flavor
                      << WindowsMsvc2017Flavor
                      << WindowsMSysFlavor << WindowsCEFlavor << UnknownFlavor;
    case VxWorks:
        return result << VxWorksFlavor << UnknownFlavor;
    case QnxOS:
        return result << GenericQnxFlavor << UnknownFlavor;
    case UnknownOS:
        return result << UnknownFlavor;
    default:
        break;
    }
    return result;
}

Abi::OSFlavor Abi::flavorForMsvcVersion(int version)
{
    if (version >= 1910)
        return WindowsMsvc2017Flavor;
    switch (version) {
    case 1900:
        return WindowsMsvc2015Flavor;
    case 1800:
        return WindowsMsvc2013Flavor;
    case 1700:
        return WindowsMsvc2012Flavor;
    case 1600:
        return WindowsMsvc2010Flavor;
    case 1500:
        return WindowsMsvc2008Flavor;
    case 1400:
        return WindowsMsvc2005Flavor;
    default:
        return WindowsMSysFlavor;
    }
}

Abi Abi::hostAbi()
{
    Architecture arch = QTC_CPU; // define set by qmake
    OS os = UnknownOS;
    OSFlavor subos = UnknownFlavor;
    BinaryFormat format = UnknownFormat;

#if defined (Q_OS_WIN)
    os = WindowsOS;
#ifdef _MSC_VER
    subos = flavorForMsvcVersion(_MSC_VER);
#elif defined (Q_CC_MINGW)
    subos = WindowsMSysFlavor;
#endif
    format = PEFormat;
#elif defined (Q_OS_LINUX)
    os = LinuxOS;
    subos = GenericLinuxFlavor;
    format = ElfFormat;
#elif defined (Q_OS_DARWIN)
    os = DarwinOS;
    subos = GenericDarwinFlavor;
    format = MachOFormat;
#elif defined (Q_OS_BSD4)
    os = BsdOS;
# if defined (Q_OS_FREEBSD)
    subos = FreeBsdFlavor;
# elif defined (Q_OS_NETBSD)
    subos = NetBsdFlavor;
# elif defined (Q_OS_OPENBSD)
    subos = OpenBsdFlavor;
# endif
    format = ElfFormat;
#endif

    const Abi result(arch, os, subos, format, QSysInfo::WordSize);
    if (!result.isValid())
        qWarning("Unable to completely determine the host ABI (%s).",
                 qPrintable(result.toString()));
    return result;
}

QList<Abi> Abi::abisOfBinary(const Utils::FileName &path)
{
    QList<Abi> tmp;
    if (path.isEmpty())
        return tmp;

    QFile f(path.toString());
    if (!f.exists())
        return tmp;

    if (!f.open(QFile::ReadOnly))
        return tmp;

    QByteArray data = f.read(1024);
    if (data.size() >= 67
            && getUint8(data, 0) == '!' && getUint8(data, 1) == '<' && getUint8(data, 2) == 'a'
            && getUint8(data, 3) == 'r' && getUint8(data, 4) == 'c' && getUint8(data, 5) == 'h'
            && getUint8(data, 6) == '>' && getUint8(data, 7) == 0x0a) {
        // We got an ar file: possibly a static lib for ELF, PE or Mach-O

        data = data.mid(8); // Cut of ar file magic
        quint64 offset = 8;

        while (!data.isEmpty()) {
            if ((getUint8(data, 58) != 0x60 || getUint8(data, 59) != 0x0a)) {
                qWarning() << path.toString() << ": Thought it was an ar-file, but it is not!";
                break;
            }

            const QString fileName = QString::fromLocal8Bit(data.mid(0, 16));
            quint64 fileNameOffset = 0;
            if (fileName.startsWith(QLatin1String("#1/")))
                fileNameOffset = fileName.midRef(3).toInt();
            const QString fileLength = QString::fromLatin1(data.mid(48, 10));

            int toSkip = 60 + fileNameOffset;
            offset += fileLength.toInt() + 60 /* header */;

            tmp.append(abiOf(data.mid(toSkip)));
            if (tmp.isEmpty() && fileName == QLatin1String("/0              "))
                tmp = parseCoffHeader(data.mid(toSkip, 20)); // This might be windws...

            if (!tmp.isEmpty()
                    && tmp.at(0).binaryFormat() != Abi::MachOFormat)