newlib/libc/ssp/mempcpy_chk.c

   1 #define _GNU_SOURCE
   2 #include <sys/cdefs.h>
   3 #include <ssp/ssp.h>
   4 #include <string.h>
   5
   6 #undef mempcpy
   7
   8 void *__mempcpy_chk(void * __restrict, const void * __restrict, size_t, size_t);
   9
  10 void *
  11 __mempcpy_chk(void * __restrict dst, const void * __restrict src, size_t len,
  12     size_t slen)
  13 {
  14         if (len > slen)
  15                 __chk_fail();
  16
  17         if (__ssp_overlap((const char *)src, (const char *)dst, len))
  18                 __chk_fail();
  19
  20         return mempcpy(dst, src, len);
  21 }