2 files changed, 38 insertions, 7 deletions
diff --git a/kernel/fs/s5fs/s5fs.c b/kernel/fs/s5fs/s5fs.c
index 602c7aa..ba406e7 100644
--- a/kernel/fs/s5fs/s5fs.c
+++ b/kernel/fs/s5fs/s5fs.c
@@ -400,7 +400,11 @@ static ssize_t s5fs_write(vnode_t *vnode, size_t pos, const void *buf,
  */
 static long s5fs_mmap(vnode_t *file, mobj_t **ret)
 {
-    NOT_YET_IMPLEMENTED("VM: s5fs_mmap");
+    // NOT_YET_IMPLEMENTED("VM: s5fs_mmap");
+
+    // Add a reference to the underlying mobj and return it
+    mobj_ref(&file->vn_mobj);
+    *ret = &file->vn_mobj;
     return 0;
 }
 
diff --git a/kernel/fs/vnode_specials.c b/kernel/fs/vnode_specials.c
index fb6df0b..d8c79bd 100644
--- a/kernel/fs/vnode_specials.c
+++ b/kernel/fs/vnode_specials.c
@@ -159,20 +159,47 @@ static long chardev_file_write(vnode_t *file, size_t pos, const void *buf,
  */
 static long chardev_file_mmap(vnode_t *file, mobj_t **ret)
 {
-    NOT_YET_IMPLEMENTED("VM: chardev_file_mmap");
-    return 0;
+    // NOT_YET_IMPLEMENTED("VM: chardev_file_mmap");
+
+    // check if the vnode represents a chardev
+    chardev_t *dev = file->vn_dev.chardev;
+    if (dev == NULL)
+    {
+        return -ENXIO;
+    }
+
+    // call the chardev's mmap operation
+    return dev->cd_ops->mmap(file, ret);
 }
 
 static long chardev_file_fill_pframe(vnode_t *file, pframe_t *pf)
 {
-    NOT_YET_IMPLEMENTED("VM: chardev_file_fill_pframe");
-    return 0;
+    // NOT_YET_IMPLEMENTED("VM: chardev_file_fill_pframe");
+
+    // check if the vnode represents a chardev
+    chardev_t *dev = file->vn_dev.chardev;
+    if (dev == NULL)
+    {
+        return -ENXIO;
+    }
+
+    // call the chardev's fill_pframe operation
+    return dev->cd_ops->fill_pframe(file, pf);
 }
 
 static long chardev_file_flush_pframe(vnode_t *file, pframe_t *pf)
 {
-    NOT_YET_IMPLEMENTED("VM: chardev_file_flush_pframe");
-    return 0;
+    // NOT_YET_IMPLEMENTED("VM: chardev_file_flush_pframe");
+
+    // check if the vnode represents a chardev
+    chardev_t *dev = file->vn_dev.chardev;
+    if (dev == NULL)
+    {
+        return -ENXIO;
+    }
+
+    // call the chardev's flush_pframe operation
+    return dev->cd_ops->flush_pframe(file, pf);
 }
 
 static ssize_t blockdev_file_read(vnode_t *file, size_t pos, void *buf,