diff --git a/binfmt/binfmt_unloadmodule.c b/binfmt/binfmt_unloadmodule.c
index 5baac9e45a..e9b44555e7 100644
--- a/binfmt/binfmt_unloadmodule.c
+++ b/binfmt/binfmt_unloadmodule.c
@@ -156,7 +156,7 @@ int unload_module(FAR struct binary_s *binp)
         {
           binfo("Unmapping address space: %p\n", binp->mapped);
 
-          munmap(binp->mapped, binp->mapsize);
+          file_munmap(binp->mapped, binp->mapsize);
         }
 
       /* Free allocated address spaces */
diff --git a/binfmt/builtin.c b/binfmt/builtin.c
index 2bb7826af8..d6d79c17ba 100644
--- a/binfmt/builtin.c
+++ b/binfmt/builtin.c
@@ -78,7 +78,7 @@ static int builtin_loadbinary(FAR struct binary_s *binp,
                               int nexports)
 {
   FAR const struct builtin_s *builtin;
-  int fd;
+  struct file file;
   int index;
   int ret;
 
@@ -86,22 +86,23 @@ static int builtin_loadbinary(FAR struct binary_s *binp,
 
   /* Open the binary file for reading (only) */
 
-  fd = nx_open(filename, O_RDONLY);
-  if (fd < 0)
+  ret = file_open(&file, filename, O_RDONLY);
+  if (ret < 0)
     {
-      berr("ERROR: Failed to open binary %s: %d\n", filename, fd);
-      return fd;
+      berr("ERROR: Failed to open binary %s: %d\n", filename, ret);
+      return ret;
     }
 
   /* If this file is a BINFS file system, then we can recover the name of
    * the file using the FIOC_FILENAME ioctl() call.
    */
 
-  ret = nx_ioctl(fd, FIOC_FILENAME, (unsigned long)((uintptr_t)&filename));
+  ret = file_ioctl(&file, FIOC_FILENAME,
+                   (unsigned long)((uintptr_t)&filename));
   if (ret < 0)
     {
       berr("ERROR: FIOC_FILENAME ioctl failed: %d\n", ret);
-      nx_close(fd);
+      file_close(&file);
       return ret;
     }
 
@@ -113,7 +114,7 @@ static int builtin_loadbinary(FAR struct binary_s *binp,
   if (index < 0)
     {
       berr("ERROR: %s is not a builtin application\n", filename);
-      nx_close(fd);
+      file_close(&file);
       return index;
     }
 
@@ -125,7 +126,7 @@ static int builtin_loadbinary(FAR struct binary_s *binp,
   binp->entrypt   = builtin->main;
   binp->stacksize = builtin->stacksize;
   binp->priority  = builtin->priority;
-  nx_close(fd);
+  file_close(&file);
   return OK;
 }
 
diff --git a/binfmt/elf.c b/binfmt/elf.c
index 9443aabff4..fd99c3d58a 100644
--- a/binfmt/elf.c
+++ b/binfmt/elf.c
@@ -114,7 +114,6 @@ static void elf_dumploadinfo(FAR struct elf_loadinfo_s *loadinfo)
   binfo("  dtors:        %08lx\n", (long)loadinfo->dtors);
   binfo("  ndtors:       %d\n",    loadinfo->ndtors);
 #endif
-  binfo("  filfd:        %d\n",    loadinfo->filfd);
   binfo("  symtabidx:    %d\n",    loadinfo->symtabidx);
   binfo("  strtabidx:    %d\n",    loadinfo->strtabidx);
 
diff --git a/binfmt/libelf/libelf_init.c b/binfmt/libelf/libelf_init.c
index f2da035e41..d2c1ba4ea5 100644
--- a/binfmt/libelf/libelf_init.c
+++ b/binfmt/libelf/libelf_init.c
@@ -134,7 +134,6 @@ int elf_init(FAR const char *filename, FAR struct elf_loadinfo_s *loadinfo)
   /* Clear the load info structure */
 
   memset(loadinfo, 0, sizeof(struct elf_loadinfo_s));
-  loadinfo->filfd = -1;
 
   /* Get the length of the file. */
 
@@ -147,10 +146,9 @@ int elf_init(FAR const char *filename, FAR struct elf_loadinfo_s *loadinfo)
 
   /* Open the binary file for reading (only) */
 
-  loadinfo->filfd = nx_open(filename, O_RDONLY);
-  if (loadinfo->filfd < 0)
+  ret = file_open(&loadinfo->file, filename, O_RDONLY);
+  if (ret < 0)
     {
-      ret = loadinfo->filfd;
       berr("Failed to open ELF binary %s: %d\n", filename, ret);
       return ret;
     }
diff --git a/binfmt/libelf/libelf_load.c b/binfmt/libelf/libelf_load.c
index 0885b0e5b7..e2c8d39828 100644
--- a/binfmt/libelf/libelf_load.c
+++ b/binfmt/libelf/libelf_load.c
@@ -239,7 +239,7 @@ int elf_load(FAR struct elf_loadinfo_s *loadinfo)
   int ret;
 
   binfo("loadinfo: %p\n", loadinfo);
-  DEBUGASSERT(loadinfo && loadinfo->filfd >= 0);
+  DEBUGASSERT(loadinfo && loadinfo->file.f_inode);
 
   /* Load section headers into memory */
 
diff --git a/binfmt/libelf/libelf_read.c b/binfmt/libelf/libelf_read.c
index f3b346944d..b05cda281e 100644
--- a/binfmt/libelf/libelf_read.c
+++ b/binfmt/libelf/libelf_read.c
@@ -108,7 +108,7 @@ int elf_read(FAR struct elf_loadinfo_s *loadinfo, FAR uint8_t *buffer,
     {
       /* Seek to the next read position */
 
-      rpos = nx_seek(loadinfo->filfd, offset, SEEK_SET);
+      rpos = file_seek(&loadinfo->file, offset, SEEK_SET);
       if (rpos != offset)
         {
           berr("Failed to seek to position %lu: %d\n",
@@ -118,7 +118,7 @@ int elf_read(FAR struct elf_loadinfo_s *loadinfo, FAR uint8_t *buffer,
 
       /* Read the file data at offset into the user buffer */
 
-      nbytes = nx_read(loadinfo->filfd, buffer, readsize);
+      nbytes = file_read(&loadinfo->file, buffer, readsize);
       if (nbytes < 0)
         {
           /* EINTR just means that we received a signal */
diff --git a/binfmt/libelf/libelf_uninit.c b/binfmt/libelf/libelf_uninit.c
index 16552d37d5..54ebee6a34 100644
--- a/binfmt/libelf/libelf_uninit.c
+++ b/binfmt/libelf/libelf_uninit.c
@@ -70,9 +70,9 @@ int elf_uninit(struct elf_loadinfo_s *loadinfo)
 
   /* Close the ELF file */
 
-  if (loadinfo->filfd >= 0)
+  if (loadinfo->file.f_inode)
     {
-      nx_close(loadinfo->filfd);
+      file_close(&loadinfo->file);
     }
 
   return OK;
diff --git a/binfmt/libnxflat/libnxflat_init.c b/binfmt/libnxflat/libnxflat_init.c
index 0f077ec75e..c7aba4f3d2 100644
--- a/binfmt/libnxflat/libnxflat_init.c
+++ b/binfmt/libnxflat/libnxflat_init.c
@@ -94,10 +94,9 @@ int nxflat_init(const char *filename, struct nxflat_loadinfo_s *loadinfo)
 
   /* Open the binary file */
 
-  loadinfo->filfd = nx_open(filename, O_RDONLY);
-  if (loadinfo->filfd < 0)
+  ret = file_open(&loadinfo->file, filename, O_RDONLY);
+  if (ret < 0)
     {
-      ret = loadinfo->filfd;
       berr("ERROR: Failed to open NXFLAT binary %s: %d\n", filename, ret);
       return ret;
     }
@@ -109,7 +108,7 @@ int nxflat_init(const char *filename, struct nxflat_loadinfo_s *loadinfo)
   if (ret < 0)
     {
       berr("ERROR: Failed to read NXFLAT header: %d\n", ret);
-      nx_close(loadinfo->filfd);
+      file_close(&loadinfo->file);
       return ret;
     }
 
@@ -128,7 +127,7 @@ int nxflat_init(const char *filename, struct nxflat_loadinfo_s *loadinfo)
        */
 
       berr("ERROR: Bad NXFLAT header\n");
-      nx_close(loadinfo->filfd);
+      file_close(&loadinfo->file);
       return -ENOEXEC;
     }
 
diff --git a/binfmt/libnxflat/libnxflat_load.c b/binfmt/libnxflat/libnxflat_load.c
index 65c4061e8d..ffbc24c47c 100644
--- a/binfmt/libnxflat/libnxflat_load.c
+++ b/binfmt/libnxflat/libnxflat_load.c
@@ -132,13 +132,12 @@ int nxflat_load(struct nxflat_loadinfo_s *loadinfo)
    * memory resides as long as it is fully initialized and ready to execute.
    */
 
-  loadinfo->ispace = (uint32_t)mmap(NULL, loadinfo->isize, PROT_READ,
-                                    MAP_SHARED | MAP_FILE, loadinfo->filfd,
-                                    0);
-  if (loadinfo->ispace == (uint32_t)MAP_FAILED)
+  ret = file_mmap(&loadinfo->file, NULL, loadinfo->isize, PROT_READ,
+                  MAP_SHARED | MAP_FILE, 0, (FAR void **)&loadinfo->ispace);
+  if (ret < 0)
     {
-      berr("Failed to map NXFLAT ISpace: %d\n", errno);
-      return -errno;
+      berr("Failed to map NXFLAT ISpace: %d\n", ret);
+      return ret;
     }
 
   binfo("Mapped ISpace (%" PRId32 " bytes) at %08x\n",
diff --git a/binfmt/libnxflat/libnxflat_read.c b/binfmt/libnxflat/libnxflat_read.c
index e90ce4a414..084e713ec0 100644
--- a/binfmt/libnxflat/libnxflat_read.c
+++ b/binfmt/libnxflat/libnxflat_read.c
@@ -113,7 +113,7 @@ int nxflat_read(struct nxflat_loadinfo_s *loadinfo, char *buffer,
   bytesleft = readsize;
   do
     {
-      rpos = nx_seek(loadinfo->filfd, offset, SEEK_SET);
+      rpos = file_seek(&loadinfo->file, offset, SEEK_SET);
       if (rpos != offset)
         {
           berr("Failed to seek to position %d: %d\n", offset, (int)rpos);
@@ -122,7 +122,7 @@ int nxflat_read(struct nxflat_loadinfo_s *loadinfo, char *buffer,
 
       /* Read the file data at offset into the user buffer */
 
-      nbytes = nx_read(loadinfo->filfd, bufptr, bytesleft);
+      nbytes = file_read(&loadinfo->file, bufptr, bytesleft);
       if (nbytes < 0)
         {
           if (nbytes != -EINTR)
diff --git a/binfmt/libnxflat/libnxflat_uninit.c b/binfmt/libnxflat/libnxflat_uninit.c
index 5ea6b17281..3c2eb63c69 100644
--- a/binfmt/libnxflat/libnxflat_uninit.c
+++ b/binfmt/libnxflat/libnxflat_uninit.c
@@ -61,9 +61,9 @@
 
 int nxflat_uninit(struct nxflat_loadinfo_s *loadinfo)
 {
-  if (loadinfo->filfd >= 0)
+  if (loadinfo->file.f_inode)
     {
-      nx_close(loadinfo->filfd);
+      file_close(&loadinfo->file);
     }
 
   return OK;
diff --git a/binfmt/libnxflat/libnxflat_unload.c b/binfmt/libnxflat/libnxflat_unload.c
index e8da56f075..cae6e3b217 100644
--- a/binfmt/libnxflat/libnxflat_unload.c
+++ b/binfmt/libnxflat/libnxflat_unload.c
@@ -72,7 +72,7 @@ int nxflat_unload(FAR struct nxflat_loadinfo_s *loadinfo)
 
   if (loadinfo->ispace)
     {
-      munmap((FAR void *)loadinfo->ispace, loadinfo->isize);
+      file_munmap((FAR void *)loadinfo->ispace, loadinfo->isize);
       loadinfo->ispace = 0;
     }
 
diff --git a/binfmt/nxflat.c b/binfmt/nxflat.c
index 3be1d4a8ca..476a04a179 100644
--- a/binfmt/nxflat.c
+++ b/binfmt/nxflat.c
@@ -123,9 +123,6 @@ static void nxflat_dumploadinfo(FAR struct nxflat_loadinfo_s *loadinfo)
   binfo("  RELOCS:\n");
   binfo("    relocstart:   %08lx\n", loadinfo->relocstart);
   binfo("    reloccount:   %d\n",    loadinfo->reloccount);
-
-  binfo("  HANDLES:\n");
-  binfo("    filfd:        %d\n",    loadinfo->filfd);
 }
 #else
 # define nxflat_dumploadinfo(i)
diff --git a/include/nuttx/binfmt/elf.h b/include/nuttx/binfmt/elf.h
index a42c4834cd..7d59f28590 100644
--- a/include/nuttx/binfmt/elf.h
+++ b/include/nuttx/binfmt/elf.h
@@ -132,7 +132,7 @@ struct elf_loadinfo_s
   uint16_t           symtabidx;  /* Symbol table section index */
   uint16_t           strtabidx;  /* String table section index */
   uint16_t           buflen;     /* size of iobuffer[] */
-  int                filfd;      /* Descriptor for the file being loaded */
+  struct file        file;       /* Descriptor for the file being loaded */
 };
 
 /****************************************************************************
diff --git a/include/nuttx/binfmt/nxflat.h b/include/nuttx/binfmt/nxflat.h
index c901570843..04ce55341f 100644
--- a/include/nuttx/binfmt/nxflat.h
+++ b/include/nuttx/binfmt/nxflat.h
@@ -95,7 +95,7 @@ struct nxflat_loadinfo_s
 
   /* File descriptors */
 
-  int filfd;               /* Descriptor for the file being loaded */
+  struct file file;        /* Descriptor for the file being loaded */
 
   /* This is a copy of the NXFLAT header (still in network order) */