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More cleanup and readme

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momo5502 2022-04-24 21:03:05 +02:00
parent 1d25ce3a94
commit c6b6e1eba9
6 changed files with 39 additions and 25 deletions
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3
.gitignore vendored
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@ -1 +1,2 @@
build/ build/
*.aps

12
README.md
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@ -1 +1,11 @@
# secret # secret
Hypervisor experiments.
Nothing serious. Yet.
## Credits
<a href="https://github.com/ionescu007/SimpleVisor">SimpleVisor</a>
<a href="https://github.com/Gbps/gbhv/tree/master/gbhv">gbhv</a>
<a href="https://www.flaticon.com/free-icon/cyber-security_2092663?related_id=2092663&origin=tag" title="cyber security icons">Icon</a>

1
src/CMakeLists.txt
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@ -1,4 +1,3 @@
add_subdirectory(shared) add_subdirectory(shared)
add_subdirectory(driver) add_subdirectory(driver)
add_subdirectory(driver_file)
add_subdirectory(runner) add_subdirectory(runner)

15
src/driver/CMakeLists.txt
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@ -28,3 +28,18 @@ target_link_libraries(driver
ia32_doc ia32_doc
shared shared
) )
################################################
set(DRIVER_FILE "$<TARGET_FILE:driver>")
file (GENERATE
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/$<LOWER_CASE:$<CONFIG>>/driver_file.h"
CONTENT "#define DRIVER_FILE \"${DRIVER_FILE}\"\n"
)
add_library(driver_file INTERFACE)
target_include_directories(driver_file INTERFACE ${CMAKE_CURRENT_BINARY_DIR}/$<LOWER_CASE:$<CONFIG>>)
add_dependencies(driver_file driver)

21
src/driver/hypervisor.cpp
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@ -9,6 +9,9 @@
#include "assembly.hpp" #include "assembly.hpp"
#include "string.hpp" #include "string.hpp"
#define DPL_USER 3
#define DPL_SYSTEM 0
namespace namespace
{ {
hypervisor* instance{nullptr}; hypervisor* instance{nullptr};
@ -163,7 +166,7 @@ bool hypervisor::install_ept_hook(const void* destination, const void* source, c
vmx::ept_translation_hint* translation_hint) vmx::ept_translation_hint* translation_hint)
{ {
volatile long failures = 0; volatile long failures = 0;
thread::dispatch_on_all_cores([&]() thread::dispatch_on_all_cores([&]
{ {
if (!this->try_install_ept_hook_on_core(destination, source, length, translation_hint)) if (!this->try_install_ept_hook_on_core(destination, source, length, translation_hint))
{ {
@ -176,7 +179,7 @@ bool hypervisor::install_ept_hook(const void* destination, const void* source, c
void hypervisor::disable_all_ept_hooks() const void hypervisor::disable_all_ept_hooks() const
{ {
thread::dispatch_on_all_cores([&]() thread::dispatch_on_all_cores([&]
{ {
auto* vm_state = this->get_current_vm_state(); auto* vm_state = this->get_current_vm_state();
if (!vm_state) if (!vm_state)
@ -203,7 +206,7 @@ void hypervisor::enable()
const auto cr3 = __readcr3(); const auto cr3 = __readcr3();
volatile long failures = 0; volatile long failures = 0;
thread::dispatch_on_all_cores([&]() thread::dispatch_on_all_cores([&]
{ {
if (!this->try_enable_core(cr3)) if (!this->try_enable_core(cr3))
{ {
@ -332,7 +335,8 @@ vmx::gdt_entry convert_gdt_entry(const uint64_t gdt_base, const uint16_t selecto
return result; return result;
} }
const auto* gdt_entry = reinterpret_cast<segment_descriptor_64*>(gdt_base + static_cast<uint64_t>(selector.index) * 8); const auto* gdt_entry = reinterpret_cast<segment_descriptor_64*>(gdt_base + static_cast<uint64_t>(selector.index) *
8);
result.selector = selector; result.selector = selector;
result.limit = __segmentlimit(selector.flags); result.limit = __segmentlimit(selector.flags);
@ -377,16 +381,13 @@ void vmx_handle_invd()
__wbinvd(); __wbinvd();
} }
#define DPL_USER 3
#define DPL_SYSTEM 0
void vmx_handle_cpuid(vmx::guest_context& guest_context) void vmx_handle_cpuid(vmx::guest_context& guest_context)
{ {
INT32 cpu_info[4]; INT32 cpu_info[4];
if ((guest_context.vp_regs->Rax == 0x41414141) && if (guest_context.vp_regs->Rax == 0x41414141 &&
(guest_context.vp_regs->Rcx == 0x42424242) && guest_context.vp_regs->Rcx == 0x42424242 &&
((read_vmx(VMCS_GUEST_CS_SELECTOR) & SEGMENT_ACCESS_RIGHTS_DESCRIPTOR_PRIVILEGE_LEVEL_MASK) == DPL_SYSTEM)) (read_vmx(VMCS_GUEST_CS_SELECTOR) & SEGMENT_ACCESS_RIGHTS_DESCRIPTOR_PRIVILEGE_LEVEL_MASK) == DPL_SYSTEM)
{ {
guest_context.exit_vm = true; guest_context.exit_vm = true;
return; return;

12
src/driver_file/CMakeLists.txt
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@ -1,12 +0,0 @@
set(DRIVER_FILE "$<TARGET_FILE:driver>")
file (GENERATE
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/$<LOWER_CASE:$<CONFIG>>/driver_file.h"
CONTENT "#define DRIVER_FILE \"${DRIVER_FILE}\"\n"
)
add_library(driver_file INTERFACE)
target_include_directories(driver_file INTERFACE ${CMAKE_CURRENT_BINARY_DIR}/$<LOWER_CASE:$<CONFIG>>)
add_dependencies(driver_file driver)