xref: /OK3568_Linux_fs/kernel/tools/testing/selftests/arm64/pauth/exec_target.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun // Copyright (C) 2020 ARM Limited
3*4882a593Smuzhiyun 
4*4882a593Smuzhiyun #include <stdio.h>
5*4882a593Smuzhiyun #include <stdlib.h>
6*4882a593Smuzhiyun #include <sys/auxv.h>
7*4882a593Smuzhiyun 
8*4882a593Smuzhiyun #include "helper.h"
9*4882a593Smuzhiyun 
main(void)10*4882a593Smuzhiyun int main(void)
11*4882a593Smuzhiyun {
12*4882a593Smuzhiyun 	struct signatures signed_vals;
13*4882a593Smuzhiyun 	unsigned long hwcaps;
14*4882a593Smuzhiyun 	size_t val;
15*4882a593Smuzhiyun 
16*4882a593Smuzhiyun 	fread(&val, sizeof(size_t), 1, stdin);
17*4882a593Smuzhiyun 
18*4882a593Smuzhiyun 	/* don't try to execute illegal (unimplemented) instructions) caller
19*4882a593Smuzhiyun 	 * should have checked this and keep worker simple
20*4882a593Smuzhiyun 	 */
21*4882a593Smuzhiyun 	hwcaps = getauxval(AT_HWCAP);
22*4882a593Smuzhiyun 
23*4882a593Smuzhiyun 	if (hwcaps & HWCAP_PACA) {
24*4882a593Smuzhiyun 		signed_vals.keyia = keyia_sign(val);
25*4882a593Smuzhiyun 		signed_vals.keyib = keyib_sign(val);
26*4882a593Smuzhiyun 		signed_vals.keyda = keyda_sign(val);
27*4882a593Smuzhiyun 		signed_vals.keydb = keydb_sign(val);
28*4882a593Smuzhiyun 	}
29*4882a593Smuzhiyun 	signed_vals.keyg = (hwcaps & HWCAP_PACG) ?  keyg_sign(val) : 0;
30*4882a593Smuzhiyun 
31*4882a593Smuzhiyun 	fwrite(&signed_vals, sizeof(struct signatures), 1, stdout);
32*4882a593Smuzhiyun 
33*4882a593Smuzhiyun 	return 0;
34*4882a593Smuzhiyun }
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