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/* -------------------------------------------
Copyright ZKA Technologies
------------------------------------------- */
#include <BootKit/Thread.hxx>
#include <BootKit/Support.hxx>
#include <BootKit/BootKit.hxx>
#include <FirmwareKit/EFI/API.hxx>
#include <KernelKit/PEF.hxx>
#include <KernelKit/PE.hxx>
#include <KernelKit/MSDOS.hxx>
#include <Modules/CoreCG/TextRenderer.hxx>
#include <CFKit/LoaderUtils.hxx>
EXTERN_C
{
#include <string.h>
}
#define kHOTypeKernel 100
EXTERN EfiBootServices* BS;
namespace Boot
{
Thread::Thread(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)
{
ExecHeaderPtr hdrPtr = ldr_find_exec_header(firstBytes);
ExecOptionalHeaderPtr optHdr = ldr_find_opt_exec_header(firstBytes);
if (hdrPtr->mMachine != kPeMachineAMD64 ||
hdrPtr->mSignature != kPeMagic)
{
writer.Write("newosldr: Not a PE32+ executable.\r");
return;
}
if (optHdr->mSubsystem != kNewOSSubsystem)
{
writer.Write("newosldr: Not a New OS executable.\r");
return;
}
writer.Write("newosldr: PE32+ executable detected (New OS Subsystem).\r");
auto numSecs = hdrPtr->mNumberOfSections;
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(hdrPtr->mSignature).Write("\r");
constexpr auto cPageSize = 512;
EfiPhysicalAddress loadStartAddress = optHdr->mImageBase;
loadStartAddress += optHdr->mBaseOfData;
writer.Write("newosldr: ImageBase: ").Write(loadStartAddress).Write("\r");
auto numPages = optHdr->mSizeOfImage / cPageSize;
BS->AllocatePages(AllocateAddress, EfiLoaderData, numPages, &loadStartAddress);
ExecSectionHeaderPtr sectPtr = (ExecSectionHeaderPtr)(((Char*)optHdr) + hdrPtr->mSizeOfOptionalHeader);
constexpr auto sectionForCode = ".text";
constexpr auto sectionForNewLdr = ".ldr";
for (SizeT sectIndex = 0; sectIndex < numSecs; ++sectIndex)
{
ExecSectionHeaderPtr sect = §Ptr[sectIndex];
if (StrCmp(sectionForCode, sect->mName) == 0)
{
fStartAddress = (VoidPtr)((UIntPtr)loadStartAddress + optHdr->mAddressOfEntryPoint);
writer.Write("newosldr: Start Address: ").Write((UIntPtr)fStartAddress).Write("\r");
}
else if (StrCmp(sectionForNewLdr, sect->mName) == 0)
{
struct HANDOVER_INFORMATION_STUB
{
UInt64 HandoverMagic;
UInt32 HandoverType;
}* structHandover = (struct HANDOVER_INFORMATION_STUB*)((UIntPtr)fBlob + sect->mPointerToRawData);
if (structHandover->HandoverMagic != kHandoverMagic ||
structHandover->HandoverType != kHOTypeKernel)
{
cg_write_text("NEWOSLDR: INVALID HANDOVER IMAGE! ABORTING...", 40, 10, RGB(0x00, 0x00, 0x00));
EFI::Stop();
}
}
writer.Write("newosldr: offset ").Write(sect->mPointerToRawData).Write(" of ").Write(sect->mName).Write("\r");
SetMem((VoidPtr)(loadStartAddress + sect->mVirtualAddress), 0, sect->mSizeOfRawData);
CopyMem((VoidPtr)(loadStartAddress + sect->mVirtualAddress), (VoidPtr)((UIntPtr)fBlob + sect->mPointerToRawData), sect->mSizeOfRawData);
}
}
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 Thread::Start(HEL::HandoverInformationHeader* handover)
{
BTextWriter writer;
if (!handover)
{
writer.Write("newosldr: Exec format error.\r");
return;
}
HEL::HandoverProc err_fn = [](HEL::HandoverInformationHeader* rcx) -> void {
cg_write_text("NEWOSLDR: INVALID IMAGE! ABORTING...", 40, 10, RGB(0x00, 0x00, 0x00));
EFI::Stop();
};
if (!fStartAddress)
{
err_fn(handover);
}
reinterpret_cast<HEL::HandoverProc>(fStartAddress)(handover);
err_fn(handover);
}
const Char* Thread::GetName()
{
return fBlobName;
}
Void Thread::SetName(const Char* name)
{
CopyMem(fBlobName, name, StrLen(name));
}
bool Thread::IsValid()
{
return fStartAddress != nullptr;
}
} // namespace Boot
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