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/* AArch64 tests for GCS.
Copyright (C) 2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <support/check.h>
#include <support/support.h>
#include <support/test-driver.h>
#include <stdio.h>
#include <sys/auxv.h>
static bool __check_gcs_status (void)
{
register unsigned long x16 asm ("x16");
asm volatile (
"mov x16, #1 /* _CHKFEAT_GCS */\n"
"hint 40 /* CHKFEAT_X16 */\n"
: "=r" (x16));
return x16 ^ 1;
}
static int
do_test (void)
{
/* Check if GCS could possible by enabled. */
if (!(getauxval (AT_HWCAP) & HWCAP_GCS))
{
puts ("kernel or CPU does not support GCS");
return EXIT_UNSUPPORTED;
}
bool gcs_enabled = __check_gcs_status ();
if (gcs_enabled)
puts ("GCS enabled");
else
puts ("GCS not enabled");
#if TEST_GCS_EXPECT_ENABLED
TEST_VERIFY (gcs_enabled);
#else
TEST_VERIFY (!gcs_enabled);
#endif
return 0;
}
#include <support/test-driver.c>
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