cmd/stackprot_test.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  Copyright 2021 Broadcom
   4  */
   5
   6 #include <common.h>
   7 #include <command.h>
   8
   9 static int do_test_stackprot_fail(struct cmd_tbl *cmdtp, int flag, int argc,
  10                                   char *const argv[])
  11 {
  12         /*
  13          * In order to avoid having the compiler optimize away the stack smashing
  14          * we need to do a little something here.
  15          */
  16         char a[128];
  17
  18         memset(a, 0xa5, 512);
  19
  20         printf("We have smashed our stack as this should not exceed 128: sizeof(a) = %zd\n",
  21                strlen(a));
  22
  23         return 0;
  24 }
  25
  26 U_BOOT_CMD(stackprot_test, 1, 1, do_test_stackprot_fail,
  27            "test stack protector fail", "");