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/* Define INIT_ARCH so that midr is initialized before use by IFUNCs.
This file is part of the GNU C Library.
Copyright (C) 2017-2024 Free Software Foundation, Inc.
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 <ldsodefs.h>
#include <sys/auxv.h>
/* Make glibc MTE-safe on a system that supports MTE in case user code
enables tag checks independently of the mte_status of glibc. There
is currently no ABI contract for enabling tag checks in user code,
but this can be useful for debugging with MTE. */
#define MTE_ENABLED() (GLRO(dl_hwcap2) & HWCAP2_MTE)
#define INIT_ARCH() \
uint64_t __attribute__((unused)) midr = \
GLRO(dl_aarch64_cpu_features).midr_el1; \
unsigned __attribute__((unused)) zva_size = \
GLRO(dl_aarch64_cpu_features).zva_size; \
bool __attribute__((unused)) bti = \
HAVE_AARCH64_BTI && GLRO(dl_aarch64_cpu_features).bti; \
bool __attribute__((unused)) mte = \
MTE_ENABLED (); \
bool __attribute__((unused)) sve = \
GLRO(dl_aarch64_cpu_features).sve; \
bool __attribute__((unused)) prefer_sve_ifuncs = \
GLRO(dl_aarch64_cpu_features).prefer_sve_ifuncs; \
bool __attribute__((unused)) mops = \
GLRO(dl_aarch64_cpu_features).mops;
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