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/* -------------------------------------------
Copyright ZKA Technologies
------------------------------------------- */
#include <BootKit/ProgramLoader.hxx>
#include <BootKit/Support.hxx>
#include <BootKit/BootKit.hxx>
#include <KernelKit/PEF.hxx>
#include <KernelKit/PE.hxx>
#include <KernelKit/MSDOS.hxx>
#include <CFKit/LoaderUtils.hxx>
EXTERN_C
{
#include <string.h>
}
namespace Boot
{
EXTERN_C Int32 rt_jump_to_address(HEL::HandoverProc baseCode, HEL::HandoverInformationHeader* handover, Char* stackPointer);
ProgramLoader::ProgramLoader(VoidPtr blob)
: fBlob(blob), fStartAddress(nullptr)
{
// detect the format.
const Char* firstBytes = reinterpret_cast<char*>(fBlob);
BTextWriter writer;
if (!firstBytes)
{
// failed to provide a valid pointer.
return;
}
if (firstBytes[0] == kMagMz0 &&
firstBytes[1] == kMagMz1)
{
writer.Write("newosldr: Windows executable detected.\r");
ExecHeaderPtr hdrPtr = ldr_find_exec_header(firstBytes);
ExecOptionalHeaderPtr optHdr = ldr_find_opt_exec_header(firstBytes);
// ================================ //
// Allocate stack.
// ================================ //
fStackPtr = new Char[optHdr->mSizeOfStackReserve];
writer.Write("newosldr: Major Linker Ver: ").Write(optHdr->mMajorLinkerVersion).Write("\r");
writer.Write("newosldr: Minor Linker Ver: ").Write(optHdr->mMinorLinkerVersion).Write("\r");
writer.Write("newosldr: Major Subsystem Ver: ").Write(optHdr->mMajorSubsystemVersion).Write("\r");
writer.Write("newosldr: Minor Subsystem Ver: ").Write(optHdr->mMinorSubsystemVersion).Write("\r");
writer.Write("newosldr: Magic: ").Write(optHdr->mMagic).Write("\r");
ExecSectionHeaderPtr sectPtr = (ExecSectionHeaderPtr)((UIntPtr)firstBytes + ((DosHeaderPtr)firstBytes)->eLfanew + hdrPtr->mSizeOfOptionalHeader + sizeof(ExecHeader) + sizeof(UInt32));
constexpr auto cMaxSectionsOfKernel = 10;
for (SizeT sectIndex = 0; sectIndex < cMaxSectionsOfKernel; ++sectIndex)
{
ExecSectionHeaderPtr sect = §Ptr[sectIndex];
// if this is a code header.
if (sect->mCharacteristics & 0x00000020)
{
fStartAddress = (VoidPtr)(optHdr->mAddressOfEntryPoint + sect->mPointerToRawData +
sect->mVirtualAddress);
writer.Write("newosldr: Start Address: ").Write((UIntPtr)fStartAddress).Write("\r");
break;
}
}
}
else if (firstBytes[0] == kPefMagic[0] &&
firstBytes[1] == kPefMagic[1] &&
firstBytes[2] == kPefMagic[2] &&
firstBytes[3] == kPefMagic[3])
{
// ========================================= //
// PEF executable detected.
// ========================================= //
fStartAddress = nullptr;
writer.Write("newosldr: PEF executable detected.\r");
}
else
{
writer.Write("newosldr: Invalid executable.\r");
}
}
/// @note handover header has to be valid!
Void ProgramLoader::Start(HEL::HandoverInformationHeader* handover)
{
BTextWriter writer;
if (!handover ||
((Char*)fStartAddress)[0] == 0x0)
{
writer.Write("newosldr: Exec format error.\r");
return;
}
writer.Write("newosldr: Trying to run: ").Write(fBlobName).Write("\r");
if (!fStartAddress)
{
HEL::HandoverProc fn = [](HEL::HandoverInformationHeader* rcx) -> void {
BTextWriter writer;
writer.Write("newosldr: Exec format error, Thread has been aborted.\r");
EFI::ThrowError(L"Exec-Format-Error", L"Format doesn't match (Thread aborted.)");
};
rt_jump_to_address(fn, handover, fStackPtr);
return;
}
HEL::HandoverProc start = reinterpret_cast<HEL::HandoverProc>((UIntPtr)fStartAddress);
rt_jump_to_address(start, handover, fStackPtr);
}
const Char* ProgramLoader::GetName()
{
return fBlobName;
}
Void ProgramLoader::SetName(const Char* name)
{
CopyMem(fBlobName, name, StrLen(name));
}
bool ProgramLoader::IsValid()
{
return fStartAddress != nullptr;
}
} // namespace Boot
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