Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2// Copyright (C) 2020 ARM Limited
3
4#include <stdio.h>
5#include <stdlib.h>
6#include <sys/auxv.h>
7
8#include "helper.h"
9
10int main(void)
11{
12 struct signatures signed_vals;
13 unsigned long hwcaps;
14 size_t val;
15
16 fread(&val, sizeof(size_t), 1, stdin);
17
18 /* don't try to execute illegal (unimplemented) instructions) caller
19 * should have checked this and keep worker simple
20 */
21 hwcaps = getauxval(AT_HWCAP);
22
23 if (hwcaps & HWCAP_PACA) {
24 signed_vals.keyia = keyia_sign(val);
25 signed_vals.keyib = keyib_sign(val);
26 signed_vals.keyda = keyda_sign(val);
27 signed_vals.keydb = keydb_sign(val);
28 }
29 signed_vals.keyg = (hwcaps & HWCAP_PACG) ? keyg_sign(val) : 0;
30
31 fwrite(&signed_vals, sizeof(struct signatures), 1, stdout);
32
33 return 0;
34}