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Implement basic file reading support

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momo5502
2024-10-22 20:24:10 +02:00
parent 45a4dfc4f0
commit a8df5f6fc8
1 changed files with 50 additions and 5 deletions
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55
src/windows-emulator/syscalls.cpp
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@@ -1493,10 +1493,41 @@ namespace
return STATUS_NOT_SUPPORTED;
}
NTSTATUS handle_NtReadFile(const syscall_context& c, const handle file_handle, const uint64_t /*event*/,
const uint64_t /*apc_routine*/,
const uint64_t /*apc_context*/,
const emulator_object<IO_STATUS_BLOCK> io_status_block,
uint64_t buffer, const ULONG length,
const emulator_object<LARGE_INTEGER> /*byte_offset*/,
const emulator_object<ULONG> /*key*/)
{
const auto* f = c.proc.files.get(file_handle);
if (!f)
{
return STATUS_INVALID_HANDLE;
}
std::string temp_buffer{};
temp_buffer.resize(length);
const auto bytes_read = fread(temp_buffer.data(), 1, temp_buffer.size(), f->handle);
if (io_status_block)
{
io_status_block.access([&](IO_STATUS_BLOCK& block)
{
block.Information = bytes_read;
});
}
c.emu.write_memory(buffer, temp_buffer.data(), temp_buffer.size());
return STATUS_SUCCESS;
}
NTSTATUS handle_NtWriteFile(const syscall_context& c, const handle file_handle, const uint64_t /*event*/,
const uint64_t /*apc_routine*/,
const uint64_t /*apc_context*/,
const emulator_object<IO_STATUS_BLOCK> /*io_status_block*/,
const emulator_object<IO_STATUS_BLOCK> io_status_block,
uint64_t buffer, const ULONG length,
const emulator_object<LARGE_INTEGER> /*byte_offset*/,
const emulator_object<ULONG> /*key*/)
@@ -1519,7 +1550,16 @@ namespace
return STATUS_INVALID_HANDLE;
}
(void)fwrite(temp_buffer.data(), 1, temp_buffer.size(), f->handle);
const auto bytes_written = fwrite(temp_buffer.data(), 1, temp_buffer.size(), f->handle);
if (io_status_block)
{
io_status_block.access([&](IO_STATUS_BLOCK& block)
{
block.Information = bytes_written;
});
}
return STATUS_SUCCESS;
}
@@ -1573,9 +1613,9 @@ namespace
NTSTATUS handle_NtCreateFile(const syscall_context& c, const emulator_object<uint64_t> file_handle,
ACCESS_MASK desired_access,
const emulator_object<OBJECT_ATTRIBUTES> object_attributes,
const emulator_object<IO_STATUS_BLOCK> io_status_block,
const emulator_object<LARGE_INTEGER> /*allocation_size*/, ULONG file_attributes,
ULONG share_access, ULONG create_disposition, ULONG create_options,
const emulator_object<IO_STATUS_BLOCK> /*io_status_block*/,
const emulator_object<LARGE_INTEGER> /*allocation_size*/, ULONG /*file_attributes*/,
ULONG /*share_access*/, ULONG create_disposition, ULONG /*create_options*/,
uint64_t /*ea_buffer*/,
ULONG /*ea_length*/)
{
@@ -1618,12 +1658,16 @@ namespace
if (f.name.ends_with(L"\\"))
{
c.win_emu.logger.print(color::dark_gray, "--> Opening folder: %S\n", f.name.c_str());
const auto handle = c.proc.files.store(std::move(f));
file_handle.write(handle.bits);
return STATUS_SUCCESS;
}
c.win_emu.logger.print(color::dark_gray, "--> Opening file: %S\n", f.name.c_str());
const auto* mode = map_mode(desired_access, create_disposition);
FILE* file{};
@@ -2068,6 +2112,7 @@ void syscall_dispatcher::add_handlers(std::unordered_map<std::string, syscall_ha
add_handler(NtDelayExecution);
add_handler(NtWaitForAlertByThreadId);
add_handler(NtAlertThreadByThreadIdEx);
add_handler(NtReadFile);
#undef add_handler
}