Misc implementations and fixes. (#250)

* Implement `sceKernelFtruncate` and `sceKernelUnlink`.

* Remove unused variable.

* Implement `sceKernelReserveVirtualRange`, misc fixes

* Fix `sceKernelReserveVirtualRange`.

* Add TODO on reserve

* Replace comment with assert.

* Add missing copyright header

* Add `UNREACHABLE` for `IOFile::Unlink`.

* Move NT API initialization out of the header

* Fix bug where files were always mapped as read only.

* `clang-format`

src/common/io_file.cpp

@@ -11,6 +11,8 @@
 #include "common/path_util.h"
 
 #ifdef _WIN32
+#include "common/ntapi.h"
+
 #include <io.h>
 #include <share.h>
 #include <windows.h>
@@ -221,15 +223,46 @@ void IOFile::Close() {
 #endif
 }
 
+void IOFile::Unlink() {
+    if (!IsOpen()) {
+        return;
+    }
+
+    // Mark the file for deletion
+    // TODO: Also remove the file path?
+#if _WIN64
+    FILE_DISPOSITION_INFORMATION disposition;
+    IO_STATUS_BLOCK iosb;
+
+    const int fd = fileno(file);
+    HANDLE hfile = reinterpret_cast<HANDLE>(_get_osfhandle(fd));
+
+    disposition.DeleteFile = TRUE;
+    NtSetInformationFile(hfile, &iosb, &disposition, sizeof(disposition),
+                         FileDispositionInformation);
+#else
+    UNREACHABLE_MSG("Missing Linux implementation");
+#endif
+}
+
 uintptr_t IOFile::GetFileMapping() {
     if (file_mapping) {
         return file_mapping;
     }
 #ifdef _WIN64
     const int fd = fileno(file);
+
     HANDLE hfile = reinterpret_cast<HANDLE>(_get_osfhandle(fd));
-    HANDLE mapping =
-        CreateFileMapping2(hfile, NULL, FILE_MAP_READ, PAGE_READONLY, SEC_COMMIT, 0, NULL, NULL, 0);
+    HANDLE mapping = nullptr;
+
+    if (file_access_mode == FileAccessMode::ReadWrite) {
+        mapping = CreateFileMapping2(hfile, NULL, FILE_MAP_WRITE, PAGE_READWRITE, SEC_COMMIT, 0,
+                                     NULL, NULL, 0);
+    } else {
+        mapping = CreateFileMapping2(hfile, NULL, FILE_MAP_READ, PAGE_READONLY, SEC_COMMIT, 0, NULL,
+                                     NULL, 0);
+    }
+
     file_mapping = std::bit_cast<uintptr_t>(mapping);
     ASSERT_MSG(file_mapping, "{}", Common::GetLastErrorMsg());
     return file_mapping;

src/common/io_file.h

@@ -107,6 +107,8 @@ public:
              FileShareFlag flag = FileShareFlag::ShareReadOnly);
     void Close();
 
+    void Unlink();
+
     bool Flush() const;
     bool Commit() const;
 

src/common/ntapi.cpp

@@ -0,0 +1,20 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "ntapi.h"
+
+NtDelayExecution_t NtDelayExecution = nullptr;
+NtSetInformationFile_t NtSetInformationFile = nullptr;
+
+namespace Common::NtApi {
+
+void Initialize() {
+    HMODULE nt_handle = GetModuleHandleA("ntdll.dll");
+
+    // http://stackoverflow.com/a/31411628/4725495
+    NtDelayExecution = (NtDelayExecution_t)GetProcAddress(nt_handle, "NtDelayExecution");
+    NtSetInformationFile =
+        (NtSetInformationFile_t)GetProcAddress(nt_handle, "NtSetInformationFile");
+}
+
+} // namespace Common::NtApi

src/common/ntapi.h

@@ -0,0 +1,124 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#ifdef _WIN32
+
+#include <windows.h>
+#include "common/types.h"
+
+typedef enum _FILE_INFORMATION_CLASS {
+    FileDirectoryInformation = 1,
+    FileFullDirectoryInformation = 2,
+    FileBothDirectoryInformation = 3,
+    FileBasicInformation = 4,
+    FileStandardInformation = 5,
+    FileInternalInformation = 6,
+    FileEaInformation = 7,
+    FileAccessInformation = 8,
+    FileNameInformation = 9,
+    FileRenameInformation = 10,
+    FileLinkInformation = 11,
+    FileNamesInformation = 12,
+    FileDispositionInformation = 13,
+    FilePositionInformation = 14,
+    FileFullEaInformation = 15,
+    FileModeInformation = 16,
+    FileAlignmentInformation = 17,
+    FileAllInformation = 18,
+    FileAllocationInformation = 19,
+    FileEndOfFileInformation = 20,
+    FileAlternateNameInformation = 21,
+    FileStreamInformation = 22,
+    FilePipeInformation = 23,
+    FilePipeLocalInformation = 24,
+    FilePipeRemoteInformation = 25,
+    FileMailslotQueryInformation = 26,
+    FileMailslotSetInformation = 27,
+    FileCompressionInformation = 28,
+    FileObjectIdInformation = 29,
+    FileCompletionInformation = 30,
+    FileMoveClusterInformation = 31,
+    FileQuotaInformation = 32,
+    FileReparsePointInformation = 33,
+    FileNetworkOpenInformation = 34,
+    FileAttributeTagInformation = 35,
+    FileTrackingInformation = 36,
+    FileIdBothDirectoryInformation = 37,
+    FileIdFullDirectoryInformation = 38,
+    FileValidDataLengthInformation = 39,
+    FileShortNameInformation = 40,
+    FileIoCompletionNotificationInformation = 41,
+    FileIoStatusBlockRangeInformation = 42,
+    FileIoPriorityHintInformation = 43,
+    FileSfioReserveInformation = 44,
+    FileSfioVolumeInformation = 45,
+    FileHardLinkInformation = 46,
+    FileProcessIdsUsingFileInformation = 47,
+    FileNormalizedNameInformation = 48,
+    FileNetworkPhysicalNameInformation = 49,
+    FileIdGlobalTxDirectoryInformation = 50,
+    FileIsRemoteDeviceInformation = 51,
+    FileUnusedInformation = 52,
+    FileNumaNodeInformation = 53,
+    FileStandardLinkInformation = 54,
+    FileRemoteProtocolInformation = 55,
+    FileRenameInformationBypassAccessCheck = 56,
+    FileLinkInformationBypassAccessCheck = 57,
+    FileVolumeNameInformation = 58,
+    FileIdInformation = 59,
+    FileIdExtdDirectoryInformation = 60,
+    FileReplaceCompletionInformation = 61,
+    FileHardLinkFullIdInformation = 62,
+    FileIdExtdBothDirectoryInformation = 63,
+    FileDispositionInformationEx = 64,
+    FileRenameInformationEx = 65,
+    FileRenameInformationExBypassAccessCheck = 66,
+    FileDesiredStorageClassInformation = 67,
+    FileStatInformation = 68,
+    FileMemoryPartitionInformation = 69,
+    FileStatLxInformation = 70,
+    FileCaseSensitiveInformation = 71,
+    FileLinkInformationEx = 72,
+    FileLinkInformationExBypassAccessCheck = 73,
+    FileStorageReserveIdInformation = 74,
+    FileCaseSensitiveInformationForceAccessCheck = 75,
+    FileKnownFolderInformation = 76,
+    FileStatBasicInformation = 77,
+    FileId64ExtdDirectoryInformation = 78,
+    FileId64ExtdBothDirectoryInformation = 79,
+    FileIdAllExtdDirectoryInformation = 80,
+    FileIdAllExtdBothDirectoryInformation = 81,
+    FileStreamReservationInformation,
+    FileMupProviderInfo,
+    FileMaximumInformation
+} FILE_INFORMATION_CLASS,
+    *PFILE_INFORMATION_CLASS;
+
+typedef struct _IO_STATUS_BLOCK {
+    union {
+        u32 Status;
+        PVOID Pointer;
+    };
+    ULONG_PTR Information;
+} IO_STATUS_BLOCK, *PIO_STATUS_BLOCK;
+
+typedef struct _FILE_DISPOSITION_INFORMATION {
+    BOOLEAN DeleteFile;
+} FILE_DISPOSITION_INFORMATION, *PFILE_DISPOSITION_INFORMATION;
+
+typedef u32(__stdcall* NtDelayExecution_t)(BOOL Alertable, PLARGE_INTEGER DelayInterval);
+
+typedef u32(__stdcall* NtSetInformationFile_t)(HANDLE FileHandle, PIO_STATUS_BLOCK IoStatusBlock,
+                                               PVOID FileInformation, ULONG Length,
+                                               FILE_INFORMATION_CLASS FileInformationClass);
+
+extern NtDelayExecution_t NtDelayExecution;
+extern NtSetInformationFile_t NtSetInformationFile;
+
+namespace Common::NtApi {
+void Initialize();
+}
+
+#endif