Bytes read via ReadFile!

src/xenia/kernel/modules/xboxkrnl/fs/devices/disc_image_entry.cc

@@ -70,15 +70,8 @@ MemoryMapping* DiscImageEntry::CreateMemoryMapping(
 
 X_STATUS DiscImageEntry::Open(
     KernelState* kernel_state,
-    /* mode etc */
+    uint32_t desired_access, bool async,
     XFile** out_file) {
-  //*out_file = new DiscImageFile...
-  return X_STATUS_NOT_IMPLEMENTED;
+  *out_file = new DiscImageFile(kernel_state, desired_access, this);
+  return X_STATUS_SUCCESS;
 }
-/*    size_t real_offset = gdfx_entry_->offset + byte_offset;
-    size_t real_length = MIN(buffer_length, gdfx_entry_->size - byte_offset);
-    xe_copy_memory(
-        buffer, buffer_length,
-        xe_mmap_get_addr(mmap_) + real_offset, real_length);
-    *out_bytes_read = real_length;
-    return X_STATUS_SUCCESS;*/

src/xenia/kernel/modules/xboxkrnl/fs/devices/disc_image_entry.h

@@ -30,12 +30,15 @@ public:
                  xe_mmap_ref mmap, GDFXEntry* gdfx_entry);
   virtual ~DiscImageEntry();
 
+  xe_mmap_ref mmap() const { return mmap_; }
+  GDFXEntry* gdfx_entry() const { return gdfx_entry_; }
+
   virtual MemoryMapping* CreateMemoryMapping(
       xe_file_mode file_mode, const size_t offset, const size_t length);
 
   virtual X_STATUS Open(
       KernelState* kernel_state,
-      /* mode etc */
+      uint32_t desired_access, bool async,
       XFile** out_file);
 
 private:

src/xenia/kernel/modules/xboxkrnl/fs/devices/disc_image_file.cc

@@ -9,6 +9,7 @@
 
 #include <xenia/kernel/modules/xboxkrnl/fs/devices/disc_image_file.h>
 
+#include <xenia/kernel/modules/xboxkrnl/fs/gdfx.h>
 #include <xenia/kernel/modules/xboxkrnl/fs/devices/disc_image_entry.h>
 
 
@@ -18,10 +19,26 @@ using namespace xe::kernel::xboxkrnl;
 using namespace xe::kernel::xboxkrnl::fs;
 
 
-DiscImageFile::DiscImageFile(KernelState* kernel_state, DiscImageEntry* entry) :
+DiscImageFile::DiscImageFile(
+    KernelState* kernel_state, uint32_t desired_access,
+    DiscImageEntry* entry) :
     entry_(entry),
-    XFile(kernel_state) {
+    XFile(kernel_state, desired_access) {
 }
 
 DiscImageFile::~DiscImageFile() {
 }
+
+X_STATUS DiscImageFile::ReadSync(
+    void* buffer, size_t buffer_length, size_t byte_offset,
+    size_t* out_bytes_read) {
+  GDFXEntry* gdfx_entry = entry_->gdfx_entry();
+  xe_mmap_ref mmap = entry_->mmap();
+  size_t real_offset = gdfx_entry->offset + byte_offset;
+  size_t real_length = MIN(buffer_length, gdfx_entry->size - byte_offset);
+  xe_copy_memory(
+      buffer, buffer_length,
+      xe_mmap_get_addr(mmap) + real_offset, real_length);
+  *out_bytes_read = real_length;
+  return X_STATUS_SUCCESS;
+}

src/xenia/kernel/modules/xboxkrnl/fs/devices/disc_image_file.h

@@ -26,9 +26,16 @@ class DiscImageEntry;
 
 class DiscImageFile : public XFile {
 public:
-  DiscImageFile(KernelState* kernel_state, DiscImageEntry* entry);
+  DiscImageFile(KernelState* kernel_state, uint32_t desired_access,
+                DiscImageEntry* entry);
   virtual ~DiscImageFile();
 
+
+protected:
+  virtual X_STATUS ReadSync(
+      void* buffer, size_t buffer_length, size_t byte_offset,
+      size_t* out_bytes_read);
+
 private:
   DiscImageEntry* entry_;
 };

src/xenia/kernel/modules/xboxkrnl/fs/devices/host_path_entry.cc

@@ -65,7 +65,24 @@ MemoryMapping* HostPathEntry::CreateMemoryMapping(
 
 X_STATUS HostPathEntry::Open(
     KernelState* kernel_state,
+    uint32_t desired_access, bool async,
     XFile** out_file) {
-  //*out_file = new DiscImageFile...
-  return X_STATUS_NOT_IMPLEMENTED;
+  DWORD share_mode = FILE_SHARE_READ;
+  DWORD creation_disposition = OPEN_EXISTING;
+  DWORD flags_and_attributes = async ? FILE_FLAG_OVERLAPPED : 0;
+  HANDLE file = CreateFile(
+      local_path_,
+      desired_access,
+      share_mode,
+      NULL,
+      creation_disposition,
+      flags_and_attributes,
+      NULL);
+  if (!file) {
+    // TODO(benvanik): pick correct response.
+    return X_STATUS_ACCESS_DENIED;
+  }
+
+  *out_file = new HostPathFile(kernel_state, desired_access, this, file);
+  return X_STATUS_SUCCESS;
 }

src/xenia/kernel/modules/xboxkrnl/fs/devices/host_path_entry.h

@@ -35,6 +35,7 @@ public:
 
   virtual X_STATUS Open(
       KernelState* kernel_state,
+      uint32_t desired_access, bool async,
       XFile** out_file);
 
 private:

src/xenia/kernel/modules/xboxkrnl/fs/devices/host_path_file.cc

@@ -18,10 +18,30 @@ using namespace xe::kernel::xboxkrnl;
 using namespace xe::kernel::xboxkrnl::fs;
 
 
-HostPathFile::HostPathFile(KernelState* kernel_state, HostPathEntry* entry) :
-    entry_(entry),
-    XFile(kernel_state) {
+HostPathFile::HostPathFile(
+    KernelState* kernel_state, uint32_t desired_access,
+    HostPathEntry* entry, HANDLE file_handle) :
+    entry_(entry), file_handle_(file_handle),
+    XFile(kernel_state, desired_access) {
 }
 
 HostPathFile::~HostPathFile() {
+  CloseHandle(file_handle_);
 }
+
+X_STATUS HostPathFile::ReadSync(
+    void* buffer, size_t buffer_length, size_t byte_offset,
+    size_t* out_bytes_read) {
+  OVERLAPPED overlapped;
+  overlapped.Pointer = (PVOID)byte_offset;
+  overlapped.hEvent = NULL;
+  DWORD bytes_read = 0;
+  BOOL read = ReadFile(
+      file_handle_, buffer, (DWORD)buffer_length, &bytes_read, &overlapped);
+  if (read) {
+    *out_bytes_read = bytes_read;
+    return X_STATUS_SUCCESS;
+  } else {
+    return X_STATUS_UNSUCCESSFUL;
+  }
+}

src/xenia/kernel/modules/xboxkrnl/fs/devices/host_path_file.h

@@ -26,11 +26,18 @@ class HostPathEntry;
 
 class HostPathFile : public XFile {
 public:
-  HostPathFile(KernelState* kernel_state, HostPathEntry* entry);
+  HostPathFile(KernelState* kernel_state, uint32_t desired_access,
+               HostPathEntry* entry, HANDLE file_handle);
   virtual ~HostPathFile();
 
+protected:
+  virtual X_STATUS ReadSync(
+      void* buffer, size_t buffer_length, size_t byte_offset,
+      size_t* out_bytes_read);
+
 private:
   HostPathEntry* entry_;
+  HANDLE         file_handle_;
 };
 
 

src/xenia/kernel/modules/xboxkrnl/fs/entry.h

@@ -59,7 +59,8 @@ public:
       xe_file_mode file_mode, const size_t offset, const size_t length) = 0;
 
   virtual X_STATUS Open(
-      KernelState* kernel_state,
+      KernelState* kernel_state,
+      uint32_t desired_access, bool async,
       XFile** out_file) = 0;
 
 private:

src/xenia/kernel/modules/xboxkrnl/objects/xfile.cc

@@ -18,8 +18,8 @@ using namespace xe::kernel;
 using namespace xe::kernel::xboxkrnl;
 
 
-XFile::XFile(KernelState* kernel_state) :
-    position_(0),
+XFile::XFile(KernelState* kernel_state, uint32_t desired_access) :
+    desired_access_(desired_access), position_(0),
     XObject(kernel_state, kTypeFile) {
   async_event_ = new XEvent(kernel_state);
   async_event_->Initialize(false, false);
@@ -42,12 +42,12 @@ X_STATUS XFile::Read(void* buffer, size_t buffer_length, size_t byte_offset,
                      size_t* out_bytes_read) {
   if (byte_offset == -1) {
     // Read from current position.
+    byte_offset = position_;
+  }
+  X_STATUS result = ReadSync(buffer, buffer_length, byte_offset, out_bytes_read);
+  if (XSUCCEEDED(result)) {
+    position_ += *out_bytes_read;
   }
-  // X_STATUS result = entry_->Read(buffer, buffer_length, byte_offset, out_bytes_read);
-  // if (XSUCCEEDED(result)) {
-  //   position_ += *out_bytes_read;
-  // }
-  X_STATUS result = X_STATUS_NOT_IMPLEMENTED;
   return result;
 }
 
@@ -56,7 +56,7 @@ X_STATUS XFile::Read(void* buffer, size_t buffer_length, size_t byte_offset,
   // Also tack on our event so that any waiters wake.
   request->AddWaitEvent(async_event_);
   position_ = byte_offset;
-  //return entry_->Read(buffer, buffer_length, byte_offset, request);
+  //return entry_->ReadAsync(buffer, buffer_length, byte_offset, request);
   X_STATUS result = X_STATUS_NOT_IMPLEMENTED;
   return result;
 }

src/xenia/kernel/modules/xboxkrnl/objects/xfile.h

@@ -25,23 +25,24 @@ class XEvent;
 
 class XFile : public XObject {
 public:
-  XFile(KernelState* kernel_state);
+  XFile(KernelState* kernel_state, uint32_t desired_access);
   virtual ~XFile();
 
   virtual X_STATUS Wait(uint32_t wait_reason, uint32_t processor_mode,
                         uint32_t alertable, uint64_t* opt_timeout);
 
-  // TODO(benvanik): Create/Open
-
   X_STATUS Read(void* buffer, size_t buffer_length, size_t byte_offset,
                 size_t* out_bytes_read);
   X_STATUS Read(void* buffer, size_t buffer_length, size_t byte_offset,
                 XAsyncRequest* request);
 
 protected:
-  // open/read/write/etc
+  virtual X_STATUS ReadSync(
+      void* buffer, size_t buffer_length, size_t byte_offset,
+      size_t* out_bytes_read) = 0;
 
 private:
+  uint32_t        desired_access_;
   XEvent*         async_event_;
 
   // TODO(benvanik): create flags, open state, etc.

src/xenia/kernel/modules/xboxkrnl/xboxkrnl_io.cc

@@ -80,7 +80,11 @@ SHIM_CALL NtCreateFile_shim(
   XFile* file = NULL;
   if (entry && entry->type() == Entry::kTypeFile) {
     // Open the file.
-    result = entry->Open(state, &file);
+    result = entry->Open(
+        state,
+        desired_access,
+        false, // TODO(benvanik): pick async mode, if needed.
+        &file);
   } else {
     result = X_STATUS_NO_SUCH_FILE;
     info = X_FILE_DOES_NOT_EXIST;