zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libc/sysdeps/linux/common/getdents64.c b/ap/build/uClibc/libc/sysdeps/linux/common/getdents64.c
new file mode 100644
index 0000000..30686f2
--- /dev/null
+++ b/ap/build/uClibc/libc/sysdeps/linux/common/getdents64.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <features.h>
+#include <assert.h>
+#include <errno.h>
+#include <dirent.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+#include <bits/kernel_types.h>
+#include <bits/uClibc_alloc.h>
+
+#if defined __UCLIBC_HAS_LFS__ && defined __NR_getdents64
+
+# ifndef offsetof
+# define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+# endif
+
+struct kernel_dirent64
+{
+ uint64_t d_ino;
+ int64_t d_off;
+ unsigned short d_reclen;
+ unsigned char d_type;
+ char d_name[256];
+};
+
+# define __NR___syscall_getdents64 __NR_getdents64
+static __inline__ _syscall3(int, __syscall_getdents64, int, fd, unsigned char *, dirp, size_t, count)
+
+ssize_t __getdents64 (int fd, char *buf, size_t nbytes) attribute_hidden;
+ssize_t __getdents64 (int fd, char *buf, size_t nbytes)
+{
+ struct dirent64 *dp;
+ off64_t last_offset = -1;
+ ssize_t retval;
+ size_t red_nbytes;
+ struct kernel_dirent64 *skdp, *kdp;
+ const size_t size_diff = (offsetof (struct dirent64, d_name)
+ - offsetof (struct kernel_dirent64, d_name));
+
+ red_nbytes = MIN (nbytes - ((nbytes /
+ (offsetof (struct dirent64, d_name) + 14)) * size_diff),
+ nbytes - size_diff);
+
+ dp = (struct dirent64 *) buf;
+ skdp = kdp = stack_heap_alloc(red_nbytes);
+
+ retval = __syscall_getdents64(fd, (unsigned char *)kdp, red_nbytes);
+ if (retval == -1) {
+ stack_heap_free(skdp);
+ return -1;
+ }
+
+ while ((char *) kdp < (char *) skdp + retval) {
+ const size_t alignment = __alignof__ (struct dirent64);
+ /* Since kdp->d_reclen is already aligned for the kernel structure
+ this may compute a value that is bigger than necessary. */
+ size_t new_reclen = ((kdp->d_reclen + size_diff + alignment - 1)
+ & ~(alignment - 1));
+ if ((char *) dp + new_reclen > buf + nbytes) {
+ /* Our heuristic failed. We read too many entries. Reset
+ the stream. */
+ assert (last_offset != -1);
+ lseek64(fd, last_offset, SEEK_SET);
+
+ if ((char *) dp == buf) {
+ /* The buffer the user passed in is too small to hold even
+ one entry. */
+ stack_heap_free(skdp);
+ __set_errno (EINVAL);
+ return -1;
+ }
+ break;
+ }
+
+ last_offset = kdp->d_off;
+ dp->d_ino = kdp->d_ino;
+ dp->d_off = kdp->d_off;
+ dp->d_reclen = new_reclen;
+ dp->d_type = kdp->d_type;
+ memcpy (dp->d_name, kdp->d_name,
+ kdp->d_reclen - offsetof (struct kernel_dirent64, d_name));
+ dp = (struct dirent64 *) ((char *) dp + new_reclen);
+ kdp = (struct kernel_dirent64 *) (((char *) kdp) + kdp->d_reclen);
+ }
+ stack_heap_free(skdp);
+ return (char *) dp - buf;
+}
+
+#if __WORDSIZE == 64
+/* since getdents doesnt give us d_type but getdents64 does, try and
+ * use getdents64 as much as possible */
+attribute_hidden strong_alias(__getdents64,__getdents)
+#endif
+
+#endif