Lightemerald/windows-user-space-emulator
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Implement basic memory manager

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momo5502
2024-08-24 21:20:37 +02:00
parent ef15cb8e53
commit 7af32da5e6
8 changed files with 496 additions and 172 deletions
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29
src/windows_emulator/main.cpp
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@@ -23,7 +23,7 @@ namespace
{
void setup_stack(x64_emulator& emu, const uint64_t stack_base, const size_t stack_size)
{
emu.map_memory(stack_base, stack_size, memory_permission::read_write);
emu.allocate_memory(stack_base, stack_size, memory_permission::read_write);
const uint64_t stack_end = stack_base + stack_size;
emu.reg(x64_register::rsp, stack_end);
@@ -43,14 +43,14 @@ namespace
};
emu.write_register(x64_register::msr, &value, sizeof(value));
emu.map_memory(segment_base, size, memory_permission::read_write);
emu.allocate_memory(segment_base, size, memory_permission::read_write);
return {emu, segment_base, size};
}
emulator_object<KUSER_SHARED_DATA> setup_kusd(x64_emulator& emu)
{
emu.map_memory(KUSD_ADDRESS, page_align_up(sizeof(KUSER_SHARED_DATA)), memory_permission::read);
emu.allocate_memory(KUSD_ADDRESS, page_align_up(sizeof(KUSER_SHARED_DATA)), memory_permission::read);
const emulator_object<KUSER_SHARED_DATA> kusd_object{emu, KUSD_ADDRESS};
kusd_object.access([](KUSER_SHARED_DATA& kusd)
@@ -84,22 +84,15 @@ namespace
binary.image_base = optional_header.ImageBase;
binary.size_of_image = optional_header.SizeOfImage;
while (true)
if (!emu.allocate_memory(binary.image_base, binary.size_of_image, memory_permission::read))
{
try
binary.image_base = emu.find_free_allocation_base(binary.size_of_image);
if ((optional_header.DllCharacteristics &
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE) == 0 || //
!emu.allocate_memory(
binary.image_base, binary.size_of_image, memory_permission::read))
{
emu.map_memory(binary.image_base, binary.size_of_image, memory_permission::read);
break;
}
catch (...)
{
binary.image_base += 0x10000;
if (binary.image_base < optional_header.ImageBase || (optional_header.DllCharacteristics &
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE) == 0)
{
throw std::runtime_error("Failed to map range");
}
throw std::runtime_error("Failed to map binary");
}
}
@@ -139,7 +132,7 @@ namespace
const auto size_of_section = page_align_up(std::max(section.SizeOfRawData, section.Misc.VirtualSize));
emu.protect_memory(target_ptr, size_of_section, permissions);
emu.protect_memory(target_ptr, size_of_section, permissions, nullptr);
}
auto& export_directory_entry = optional_header.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT];