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 main(void)10int main(void) 11 { 12 struct signatures signed_vals; 13 unsigned long hwcaps; 14 size_t val; 15 16 size_t size = fread(&val, sizeof(size_t), 1, stdin); 17 18 if (size != 1) { 19 fprintf(stderr, "Could not read input from stdin\n"); 20 return EXIT_FAILURE; 21 } 22 23 /* don't try to execute illegal (unimplemented) instructions) caller 24 * should have checked this and keep worker simple 25 */ 26 hwcaps = getauxval(AT_HWCAP); 27 28 if (hwcaps & HWCAP_PACA) { 29 signed_vals.keyia = keyia_sign(val); 30 signed_vals.keyib = keyib_sign(val); 31 signed_vals.keyda = keyda_sign(val); 32 signed_vals.keydb = keydb_sign(val); 33 } 34 signed_vals.keyg = (hwcaps & HWCAP_PACG) ? keyg_sign(val) : 0; 35 36 fwrite(&signed_vals, sizeof(struct signatures), 1, stdout); 37 38 return 0; 39 } 40