| Joel Peshkin | 4e9bce1 | 2021-04-11 11:21:58 +0200 | [diff] [blame] | 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 | { |
| Tom Rini | 2fc62f2 | 2021-05-24 14:19:05 -0400 | [diff] [blame] | 12 | /* |
| 13 | * In order to avoid having the compiler optimize away the stack smashing |
| 14 | * we need to do a little something here. |
| 15 | */ |
| Joel Peshkin | 4e9bce1 | 2021-04-11 11:21:58 +0200 | [diff] [blame] | 16 | char a[128]; |
| 17 | |
| 18 | memset(a, 0xa5, 512); |
| Tom Rini | 2fc62f2 | 2021-05-24 14:19:05 -0400 | [diff] [blame] | 19 | |
| Heinrich Schuchardt | 63de067 | 2022-02-04 10:50:04 +0100 | [diff] [blame] | 20 | printf("We have smashed our stack as this should not exceed 128: sizeof(a) = %zd\n", |
| 21 | strlen(a)); |
| Tom Rini | 2fc62f2 | 2021-05-24 14:19:05 -0400 | [diff] [blame] | 22 | |
| Joel Peshkin | 4e9bce1 | 2021-04-11 11:21:58 +0200 | [diff] [blame] | 23 | return 0; |
| 24 | } |
| 25 | |
| 26 | U_BOOT_CMD(stackprot_test, 1, 1, do_test_stackprot_fail, |
| 27 | "test stack protector fail", ""); |