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/* -------------------------------------------
Copyright SoftwareLabs
------------------------------------------- */
#include <KernelKit/DebugOutput.hpp>
#include <KernelKit/FileManager.hpp>
#include <KernelKit/KernelHeap.hpp>
#include <KernelKit/PEFCodeManager.hxx>
#include <KernelKit/ProcessScheduler.hxx>
#include <NewKit/Defines.hpp>
#include <NewKit/KernelCheck.hpp>
#include <NewKit/OwnPtr.hpp>
#include <NewKit/String.hpp>
namespace NewOS
{
namespace Detail
{
/// @brief Get the PEF platform signature according to the compiled backebnd
UInt32 rt_get_pef_platform(void) noexcept
{
#ifdef __32x0__
return kPefArch32x0;
#elif defined(__64x0__)
return kPefArch64x0;
#elif defined(__x86_64__)
return kPefArchAMD64;
#elif defined(__powerpc64__)
return kPefArchPowerPC;
#else
return kPefArchInvalid;
#endif // __32x0__ || __64x0__ || __x86_64__
}
} // namespace Detail
/// @brief PEF loader constructor w/ blob.
/// @param blob
PEFLoader::PEFLoader(const VoidPtr blob)
: fCachedBlob(blob)
{
MUST_PASS(fCachedBlob);
fBad = false;
}
/// @brief PEF loader constructor.
/// @param path the filesystem path.
PEFLoader::PEFLoader(const Char* path)
: fCachedBlob(nullptr), fBad(false), fFatBinary(false)
{
OwnPtr<FileStream<Char>> file;
file.New(const_cast<Char*>(path), kRestrictRB);
if (StringBuilder::Equals(file->MIME(), this->MIME()))
{
fPath = StringBuilder::Construct(path).Leak();
fCachedBlob = file->Read();
PEFContainer* container = reinterpret_cast<PEFContainer*>(fCachedBlob);
if (container->Cpu == Detail::rt_get_pef_platform() &&
container->Magic[0] == kPefMagic[0] &&
container->Magic[1] == kPefMagic[1] &&
container->Magic[2] == kPefMagic[2] &&
container->Magic[3] == kPefMagic[3] &&
container->Magic[4] == kPefMagic[4] && container->Abi == kPefAbi)
{
return;
}
else if (container->Magic[4] == kPefMagic[0] &&
container->Magic[3] == kPefMagic[1] &&
container->Magic[2] == kPefMagic[2] &&
container->Magic[1] == kPefMagic[3] &&
container->Magic[0] == kPefMagic[0] && container->Abi == kPefAbi)
{
/// This is a fat binary.
this->fFatBinary = true;
return;
}
kcout << "CodeManager: Warning: Executable format error!\n";
fBad = true;
ke_delete_ke_heap(fCachedBlob);
fCachedBlob = nullptr;
}
}
/// @brief PEF destructor.
PEFLoader::~PEFLoader()
{
if (fCachedBlob)
ke_delete_ke_heap(fCachedBlob);
}
VoidPtr PEFLoader::FindSymbol(const char* name, Int32 kind)
{
if (!fCachedBlob || fBad)
return nullptr;
PEFContainer* container = reinterpret_cast<PEFContainer*>(fCachedBlob);
PEFCommandHeader* container_header = reinterpret_cast<PEFCommandHeader*>(
(UIntPtr)fCachedBlob + sizeof(PEFContainer));
constexpr auto cMangleCharacter = '$';
const char* cContainerKinds[] = {".code64", ".data64", ".zero64", nullptr};
ErrorOr<StringView> errOrSym;
switch (kind)
{
case kPefCode: {
errOrSym = StringBuilder::Construct(cContainerKinds[0]); // code symbol.
break;
}
case kPefData: {
errOrSym = StringBuilder::Construct(cContainerKinds[1]); // data symbol.
break;
}
case kPefZero: {
errOrSym = StringBuilder::Construct(cContainerKinds[2]); // block starting symbol.
break;
}
default:
return nullptr;
}
char* unconstSymbol = const_cast<char*>(name);
for (SizeT i = 0UL; i < rt_string_len(unconstSymbol, kPefNameLen); ++i)
{
if (unconstSymbol[i] == ' ')
{
unconstSymbol[i] = cMangleCharacter;
}
}
errOrSym.Leak().Leak() += name;
for (SizeT index = 0; index < container->Count; ++index)
{
if (StringBuilder::Equals(container_header->Name,
errOrSym.Leak().Leak().CData()))
{
if (container_header->Kind == kind)
{
if (container_header->Cpu != Detail::rt_get_pef_platform())
{
if (!this->fFatBinary)
return nullptr;
}
return (VoidPtr)(static_cast<UIntPtr*>(fCachedBlob) +
container_header->Offset);
}
}
}
return nullptr;
}
/// @brief Finds the executable entrypoint.
/// @return
ErrorOr<VoidPtr> PEFLoader::FindStart()
{
if (auto sym = this->FindSymbol(kPefStart, kPefCode); sym)
return ErrorOr<VoidPtr>(sym);
return ErrorOr<VoidPtr>(kErrorExecutable);
}
/// @brief Tells if the executable is loaded or not.
/// @return
bool PEFLoader::IsLoaded() noexcept
{
return !fBad && fCachedBlob;
}
namespace Utils
{
bool execute_from_image(PEFLoader& exec, const Int32& procKind) noexcept
{
auto errOrStart = exec.FindStart();
if (errOrStart.Error() != 0)
return false;
ProcessHeader proc(errOrStart.Leak().Leak());
Ref<ProcessHeader> refProc = proc;
proc.Kind = procKind;
return ProcessScheduler::The().Leak().Add(refProc);
}
} // namespace Utils
const char* PEFLoader::Path()
{
return fPath.Leak().CData();
}
const char* PEFLoader::FormatAsString()
{
#ifdef __32x0__
return "32x0 PEF.";
#elif defined(__64x0__)
return "64x0 PEF.";
#elif defined(__x86_64__)
return "x86_64 PEF.";
#elif defined(__powerpc64__)
return "POWER PEF.";
#else
return "Unknown PEF.";
#endif // __32x0__ || __64x0__ || __x86_64__ || __powerpc64__
}
const char* PEFLoader::MIME()
{
return kPefApplicationMime;
}
} // namespace NewOS
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