// SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2020 ARM Limited #include <stdio.h> #include <stdlib.h> #include <sys/auxv.h> #include "helper.h" int main(void) { struct signatures signed_vals; unsigned long hwcaps; size_t val; size_t size = fread(&val, sizeof(size_t), 1, stdin); if (size != 1) { fprintf(stderr, "Could not read input from stdin\n"); return EXIT_FAILURE; } /* don't try to execute illegal (unimplemented) instructions) caller * should have checked this and keep worker simple */ hwcaps = getauxval(AT_HWCAP); if (hwcaps & HWCAP_PACA) { signed_vals.keyia = keyia_sign(val); signed_vals.keyib = keyib_sign(val); signed_vals.keyda = keyda_sign(val); signed_vals.keydb = keydb_sign(val); } signed_vals.keyg = (hwcaps & HWCAP_PACG) ? keyg_sign(val) : 0; fwrite(&signed_vals, sizeof(struct signatures), 1, stdout); return 0; }