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Support mapping memory to device files

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This commit is contained in:
Stephen Miller 2025-04-21 15:21:12 -05:00
parent 3dac1a2c6a
commit 8b5b34fdba
4 changed files with 18 additions and 0 deletions
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1
src/common/path_util.cpp
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@ -136,6 +136,7 @@ static auto UserPaths = [] {
create_path(PathType::PatchesDir, user_dir / PATCHES_DIR); create_path(PathType::PatchesDir, user_dir / PATCHES_DIR);
create_path(PathType::MetaDataDir, user_dir / METADATA_DIR); create_path(PathType::MetaDataDir, user_dir / METADATA_DIR);
create_path(PathType::CustomTrophy, user_dir / CUSTOM_TROPHY); create_path(PathType::CustomTrophy, user_dir / CUSTOM_TROPHY);
create_path(PathType::DevicesDir, user_dir / DEVICES_DIR);
std::ofstream notice_file(user_dir / CUSTOM_TROPHY / "Notice.txt"); std::ofstream notice_file(user_dir / CUSTOM_TROPHY / "Notice.txt");
if (notice_file.is_open()) { if (notice_file.is_open()) {

2
src/common/path_util.h
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@ -28,6 +28,7 @@ enum class PathType {
PatchesDir, // Where patches are stored. PatchesDir, // Where patches are stored.
MetaDataDir, // Where game metadata (e.g. trophies and menu backgrounds) is stored. MetaDataDir, // Where game metadata (e.g. trophies and menu backgrounds) is stored.
CustomTrophy, // Where custom files for trophies are stored. CustomTrophy, // Where custom files for trophies are stored.
DevicesDir, // Where temporary device files are located.
}; };
constexpr auto PORTABLE_DIR = "user"; constexpr auto PORTABLE_DIR = "user";
@ -46,6 +47,7 @@ constexpr auto CHEATS_DIR = "cheats";
constexpr auto PATCHES_DIR = "patches"; constexpr auto PATCHES_DIR = "patches";
constexpr auto METADATA_DIR = "game_data"; constexpr auto METADATA_DIR = "game_data";
constexpr auto CUSTOM_TROPHY = "custom_trophy"; constexpr auto CUSTOM_TROPHY = "custom_trophy";
constexpr auto DEVICES_DIR = "device";
// Filenames // Filenames
constexpr auto LOG_FILE = "shad_log.txt"; constexpr auto LOG_FILE = "shad_log.txt";

9
src/core/libraries/kernel/file_system.cpp
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@ -91,6 +91,15 @@ s32 PS4_SYSV_ABI open(const char* raw_path, s32 flags, u16 mode) {
file->type = Core::FileSys::FileType::Device; file->type = Core::FileSys::FileType::Device;
file->m_guest_name = path; file->m_guest_name = path;
file->device = factory(handle, path.data(), flags, mode); file->device = factory(handle, path.data(), flags, mode);
// Some libraries map memory to their file. We need a host file to support this.
file->m_host_name = mnt->GetHostPath(file->m_guest_name);
bool exists = std::filesystem::exists(file->m_host_name);
if (!exists) {
Common::FS::IOFile out(file->m_host_name, Common::FS::FileAccessMode::Write);
}
auto e = file->f.Open(file->m_host_name, Common::FS::FileAccessMode::ReadWrite);
ASSERT(e == 0);
return handle; return handle;
} }
} }

6
src/emulator.cpp
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@ -245,6 +245,12 @@ void Emulator::Run(const std::filesystem::path& file, const std::vector<std::str
} }
VideoCore::SetOutputDir(mount_captures_dir, id); VideoCore::SetOutputDir(mount_captures_dir, id);
const auto& devices_dir = Common::FS::GetUserPath(Common::FS::PathType::DevicesDir);
if (!std::filesystem::exists(devices_dir)) {
std::filesystem::create_directory(devices_dir);
}
mnt->Mount(devices_dir, "/dev");
// Initialize kernel and library facilities. // Initialize kernel and library facilities.
Libraries::InitHLELibs(&linker->GetHLESymbols()); Libraries::InitHLELibs(&linker->GetHLESymbols());