tools/libfdt/fdt_rw.c

   1 /* SPDX-License-Identifier:     GPL-2.0+ BSD-2-Clause */
   2 #include "fdt_host.h"
   3 #include "../../scripts/dtc/libfdt/fdt_rw.c"
   4
   5 int fdt_remove_unused_strings(const void *old, void *new)
   6 {
   7         const struct fdt_property *old_prop;
   8         struct fdt_property *new_prop;
   9         int size = fdt_totalsize(old);
  10         int next_offset, offset;
  11         const char *str;
  12         int ret;
  13         int tag = FDT_PROP;
  14
  15         /* Make a copy and remove the strings */
  16         memcpy(new, old, size);
  17         fdt_set_size_dt_strings(new, 0);
  18
  19         /* Add every property name back into the new string table */
  20         for (offset = 0; tag != FDT_END; offset = next_offset) {
  21                 tag = fdt_next_tag(old, offset, &next_offset);
  22                 if (tag != FDT_PROP)
  23                         continue;
  24                 old_prop = fdt_get_property_by_offset(old, offset, NULL);
  25                 new_prop = (struct fdt_property *)(unsigned long)
  26                         fdt_get_property_by_offset(new, offset, NULL);
  27                 str = fdt_string(old, fdt32_to_cpu(old_prop->nameoff));
  28                 ret = _fdt_find_add_string(new, str);
  29                 if (ret < 0)
  30                         return ret;
  31                 new_prop->nameoff = cpu_to_fdt32(ret);
  32         }
  33
  34         return 0;
  35 }