Lightemerald/windows-user-space-emulator
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migrate to platform structures

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This commit is contained in:
robert-yates
2024-11-23 18:59:54 +01:00
parent 12c80f159e
commit 8e049a2650
16 changed files with 326 additions and 295 deletions
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19
src/windows-emulator/module/module_mapping.cpp
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@@ -7,9 +7,14 @@
namespace
{
uint64_t get_first_section_offset(const IMAGE_NT_HEADERS& nt_headers, const uint64_t nt_headers_offset)
uint64_t get_first_section_offset(const PENTHeaders_t<std::uint64_t>& nt_headers, const uint64_t nt_headers_offset)
{
const auto first_section_absolute = reinterpret_cast<uint64_t>(IMAGE_FIRST_SECTION(&nt_headers));
const uint8_t* nt_headers_addr = reinterpret_cast<const uint8_t*>(&nt_headers);
size_t optional_header_offset = reinterpret_cast<uintptr_t>(&(nt_headers.OptionalHeader)) - reinterpret_cast<uintptr_t>(&nt_headers);
size_t optional_header_size = nt_headers.FileHeader.SizeOfOptionalHeader;
const uint8_t* first_section_addr = nt_headers_addr + optional_header_offset + optional_header_size;
const auto first_section_absolute = reinterpret_cast<uint64_t>(first_section_addr);
const auto absolute_base = reinterpret_cast<uint64_t>(&nt_headers);
return nt_headers_offset + (first_section_absolute - absolute_base);
}
@@ -24,7 +29,7 @@ namespace
}
void collect_exports(mapped_module& binary, const utils::safe_buffer_accessor<const uint8_t> buffer,
const IMAGE_OPTIONAL_HEADER& optional_header)
const PEOptionalHeader_t<std::uint64_t>& optional_header)
{
auto& export_directory_entry = optional_header.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT];
if (export_directory_entry.VirtualAddress == 0 || export_directory_entry.Size == 0)
@@ -71,7 +76,7 @@ namespace
}
void apply_relocations(const mapped_module& binary, const utils::safe_buffer_accessor<uint8_t> buffer,
const IMAGE_OPTIONAL_HEADER& optional_header)
const PEOptionalHeader_t<std::uint64_t>& optional_header)
{
const auto delta = binary.image_base - optional_header.ImageBase;
if (delta == 0)
@@ -134,7 +139,7 @@ namespace
void map_sections(emulator& emu, const mapped_module& binary,
const utils::safe_buffer_accessor<const uint8_t> buffer,
const IMAGE_NT_HEADERS& nt_headers, const uint64_t nt_headers_offset)
const PENTHeaders_t<std::uint64_t>& nt_headers, const uint64_t nt_headers_offset)
{
const auto first_section_offset = get_first_section_offset(nt_headers, nt_headers_offset);
const auto sections = buffer.as<IMAGE_SECTION_HEADER>(first_section_offset);
@@ -183,10 +188,10 @@ namespace
utils::safe_buffer_accessor buffer{data};
const auto dos_header = buffer.as<IMAGE_DOS_HEADER>(0).get();
const auto dos_header = buffer.as<PEDosHeader_t>(0).get();
const auto nt_headers_offset = dos_header.e_lfanew;
const auto nt_headers = buffer.as<IMAGE_NT_HEADERS>(nt_headers_offset).get();
const auto nt_headers = buffer.as<PENTHeaders_t<std::uint64_t>>(nt_headers_offset).get();
auto& optional_header = nt_headers.OptionalHeader;
binary.image_base = optional_header.ImageBase;