| /* |
| * Memory tagging, unaligned access crossing pages. |
| * https://gitlab.com/qemu-project/qemu/-/issues/403 |
| * |
| * Copyright (c) 2021 Linaro Ltd |
| * SPDX-License-Identifier: GPL-2.0-or-later |
| */ |
| |
| #include "mte.h" |
| |
| int main(int ac, char **av) |
| { |
| void *p; |
| |
| enable_mte(PR_MTE_TCF_SYNC); |
| p = alloc_mte_mem(2 * 0x1000); |
| |
| /* Tag the pointer. */ |
| p = (void *)((unsigned long)p | (1ul << 56)); |
| |
| /* Store tag in sequential granules. */ |
| asm("stg %0, [%0]" : : "r"(p + 0x0ff0)); |
| asm("stg %0, [%0]" : : "r"(p + 0x1000)); |
| |
| /* |
| * Perform an unaligned store with tag 1 crossing the pages. |
| * Failure dies with SIGSEGV. |
| */ |
| asm("str %0, [%0]" : : "r"(p + 0x0ffc)); |
| return 0; |
| } |
