Calls to the following functions may not work correctly when made using protected calls:

• memcpy
  • Calls to this function may be generated by the compiler
• setjmp/longjmp
• strcmp

As a workaround, provide a local C implementation of these functions and call them instead. This may impact performance and will impact code size.

void *memcpy(void *dest, const void *src, size_t count ) {
  for (size_t i = 0; i < count; i++)
    dest[i] = src[i];
  return dest;
}

int strcmp(const char *lhs, const char *rhs) {
  int c1, res;
  for (;;) {
    c1  = (unsigned char)*string1++;
    res = c1 - (unsigned char)*string2++;
    if (c1 == 0 || res != 0) break;
}