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66 lines
2.3 KiB
66 lines
2.3 KiB
#include "vmxlaunch.hpp"
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#include "idt.hpp"
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auto drv_entry(PDRIVER_OBJECT driver_object, PUNICODE_STRING registry_path) -> NTSTATUS
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{
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vmxon::g_vmx_ctx =
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reinterpret_cast<hv::pvmx_ctx>(
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ExAllocatePool(NonPagedPool, sizeof hv::vmx_ctx));
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// setup vcpu structures (vmx on region and vmcs...)
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vmxon::create_vcpus(vmxon::g_vmx_ctx);
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cr3 cr3_value;
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cr3_value.flags = __readcr3();
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cr3_value.address_of_page_directory =
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(MmGetPhysicalAddress(mm::pml4).QuadPart >> 12);
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memset(mm::pml4, NULL, sizeof mm::pml4);
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mm::pml4[PML4_SELF_REF].pfn = cr3_value.address_of_page_directory;
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mm::pml4[PML4_SELF_REF].present = true;
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mm::pml4[PML4_SELF_REF].rw = true;
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mm::pml4[PML4_SELF_REF].user_supervisor = false;
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PHYSICAL_ADDRESS current_pml4;
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current_pml4.QuadPart =
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(cr3{ __readcr3() }.address_of_page_directory << 12);
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const auto kernel_pml4 =
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reinterpret_cast<mm::ppml4e>(
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MmGetVirtualForPhysical(current_pml4));
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// vmxroot will have the same "address space" as the current one being executed in...
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memcpy(&mm::pml4[255], &kernel_pml4[255], sizeof(mm::pml4e) * 255);
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// setup mapping ptes to be present, writeable, executable, and user supervisor false...
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for (auto idx = 0u; idx < 254; ++idx)
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{
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reinterpret_cast<mm::ppte>(mm::pml4)[idx].present = true;
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reinterpret_cast<mm::ppte>(mm::pml4)[idx].rw = true;
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}
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// setup IDT for host....
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segment_descriptor_register_64 idt_value;
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__sidt(&idt_value);
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// copy the guest IDT entries...
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memcpy(idt::table, (void*)idt_value.base_address, idt_value.limit);
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// change gp, pf, and de to vmxroot handlers...
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idt::table[general_protection] = idt::create_entry(hv::idt_addr_t{ __gp_handler }, idt::ist_idx::gp);
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idt::table[page_fault] = idt::create_entry(hv::idt_addr_t{ __pf_handler }, idt::ist_idx::pf);
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idt::table[divide_error] = idt::create_entry(hv::idt_addr_t{ __de_handler }, idt::ist_idx::de);
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// used for SEH in vmxroot fault handler...
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idt::image_base = driver_object->DriverStart;
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// enable vmx operation on all cores...
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KeIpiGenericCall((PKIPI_BROADCAST_WORKER)&vmxon::init_vmxon, NULL);
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// setup VMCS for all logical cores...
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KeIpiGenericCall((PKIPI_BROADCAST_WORKER)&vmxlaunch::init_vmcs, cr3_value.flags);
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// vmxlaunch for all cores...
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KeIpiGenericCall((PKIPI_BROADCAST_WORKER)&vmxlaunch::launch, NULL);
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return STATUS_SUCCESS;
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} |