the bug of sscanf exception output in arm64 platform

[Boatingup]

Summary

On the arm64 platform, size_t needs to be set to the corresponding mode in sscanf, otherwise the format will be converted incorrectly

Impact

Testing

  char header[5];
  size_t size;
  header[0] = '0';
  header[1] = '0';
  header[2] = '2';
  header[3] = '1';
  header[4] = 0;
  fprintf(stderr, "header = \"%s\"\n", header);
  if (sscanf(header, "%04zx", &size) != 1)
    {   
      return -EINVAL;
    } 
  fprintf(stderr, "size = %04zx\n", size); 

Unmodified test results

header = "0021"
size = deaddead00000021

Modified test results

header = "0021"                                                                                                                            
size = 0021