root/tools/testing/selftests/arm64/signal/test_signals.c
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2019 ARM Limited
 *
 * Generic test wrapper for arm64 signal tests.
 *
 * Each test provides its own tde struct tdescr descriptor to link with
 * this wrapper. Framework provides common helpers.
 */

#include <sys/auxv.h>
#include <sys/prctl.h>

#include <kselftest.h>

#include "test_signals.h"
#include "test_signals_utils.h"

struct tdescr *current = &tde;

int main(int argc, char *argv[])
{
        /*
         * Ensure GCS is at least enabled throughout the tests if
         * supported, otherwise the inability to return from the
         * function that enabled GCS makes it very inconvenient to set
         * up test cases.  The prctl() may fail if GCS was locked by
         * libc setup code.
         */
        if (getauxval(AT_HWCAP) & HWCAP_GCS)
                gcs_set_state(PR_SHADOW_STACK_ENABLE);

        ksft_print_msg("%s :: %s\n", current->name, current->descr);
        if (test_setup(current) && test_init(current)) {
                test_run(current);
                test_cleanup(current);
        }
        test_result(current);

        /* Do not return in case GCS was enabled */
        exit(current->result);
}