Lightemerald/windows-user-space-emulator
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Add support for user_object/user_handle_table (#677)

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Fixes #641

This PR is my attempt to add support for user32 objects and the user32
handle table. I also added a test, but as expected, it fails on Windows
2022. I’ll try to fix that another day, but feel free to review the code
😄
This commit is contained in:
Maurice Heumann
2026-01-06 10:21:58 +01:00
committed by GitHub
parent e0c386abbb 90b38b3bff
commit d3af3c781c
12 changed files with 747 additions and 15 deletions
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62
src/windows-emulator/process_context.cpp
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@@ -176,12 +176,40 @@ namespace
return env_map;
}
uint32_t read_windows_build(registry_manager& registry)
{
const auto key = registry.get_key({R"(\Registry\Machine\Software\Microsoft\Windows NT\CurrentVersion)"});
if (!key)
{
return 0;
}
for (size_t i = 0; const auto value = registry.get_value(*key, i); ++i)
{
if (value->type != REG_SZ)
{
continue;
}
if (value->name == "CurrentBuildNumber" || value->name == "CurrentBuild")
{
const auto* s = reinterpret_cast<const char16_t*>(value->data.data());
return static_cast<uint32_t>(std::strtoul(u16_to_u8(s).c_str(), nullptr, 10));
}
}
return 0;
}
}
void process_context::setup(x86_64_emulator& emu, memory_manager& memory, registry_manager& registry,
const application_settings& app_settings, const mapped_module& executable, const mapped_module& ntdll,
const apiset::container& apiset_container, const mapped_module* ntdll32)
{
this->windows_build_number = read_windows_build(registry);
setup_gdt(emu, memory);
this->kusd.setup();
@@ -391,6 +419,34 @@ void process_context::setup(x86_64_emulator& emu, memory_manager& memory, regist
this->instrumentation_callback = 0;
this->default_register_set = emu.save_registers();
this->user_handles.setup();
auto [h, monitor_obj] = this->user_handles.allocate_object<USER_MONITOR>(handle_types::monitor);
this->default_monitor_handle = h;
monitor_obj.access([&](USER_MONITOR& monitor) {
monitor.hmon = h.bits;
monitor.rcMonitor = {.left = 0, .top = 0, .right = 1920, .bottom = 1080};
monitor.rcWork = monitor.rcMonitor;
if (this->is_older_windows_build())
{
monitor.b20.monitorDpi = 96;
monitor.b20.nativeDpi = monitor.b20.monitorDpi;
monitor.b20.cachedDpi = monitor.b20.monitorDpi;
monitor.b20.rcMonitorDpiAware = monitor.rcMonitor;
}
else
{
monitor.b26.monitorDpi = 96;
monitor.b26.nativeDpi = monitor.b26.monitorDpi;
}
});
const auto user_display_info = this->user_handles.get_display_info();
user_display_info.access([&](USER_DISPINFO& display_info) {
display_info.dwMonitorCount = 1;
display_info.pPrimaryMonitor = monitor_obj.value();
});
}
void process_context::serialize(utils::buffer_serializer& buffer) const
@@ -408,6 +464,7 @@ void process_context::serialize(utils::buffer_serializer& buffer) const
buffer.write(this->kusd);
buffer.write(this->is_wow64_process);
buffer.write(this->windows_build_number);
buffer.write(this->ntdll_image_base);
buffer.write(this->ldr_initialize_thunk);
buffer.write(this->rtl_user_thread_start);
@@ -416,6 +473,8 @@ void process_context::serialize(utils::buffer_serializer& buffer) const
buffer.write(this->ki_user_exception_dispatcher);
buffer.write(this->instrumentation_callback);
buffer.write(this->user_handles);
buffer.write(this->default_monitor_handle);
buffer.write(this->events);
buffer.write(this->files);
buffer.write(this->sections);
@@ -454,6 +513,7 @@ void process_context::deserialize(utils::buffer_deserializer& buffer)
buffer.read(this->kusd);
buffer.read(this->is_wow64_process);
buffer.read(this->windows_build_number);
buffer.read(this->ntdll_image_base);
buffer.read(this->ldr_initialize_thunk);
buffer.read(this->rtl_user_thread_start);
@@ -462,6 +522,8 @@ void process_context::deserialize(utils::buffer_deserializer& buffer)
buffer.read(this->ki_user_exception_dispatcher);
buffer.read(this->instrumentation_callback);
buffer.read(this->user_handles);
buffer.read(this->default_monitor_handle);
buffer.read(this->events);
buffer.read(this->files);
buffer.read(this->sections);