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s390x: Check HWCAP bits against compiler flags
When compiled with GCC 11.1 and -march=z14 -O3 build flags, running ld.so (or any dynamically linked program) prints: Fatal glibc error: CPU lacks VXE support (z14 or later required) Co-Authored-By: Stefan Liebler <stli@linux.ibm.com> Reviewed-by: Stefan Liebler <stli@linux.ibm.com>
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sysdeps/s390/s390-64/dl-hwcap-check.h
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sysdeps/s390/s390-64/dl-hwcap-check.h
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/* Check for hardware capabilities after HWCAP parsing. S390 version.
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Copyright (C) 2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _DL_HWCAP_CHECK_H
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#define _DL_HWCAP_CHECK_H
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#include <ldsodefs.h>
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static inline void
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dl_hwcap_check (void)
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{
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#if defined __ARCH__
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# if __ARCH__ >= 13
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if (!(GLRO(dl_hwcap) & HWCAP_S390_VXRS_EXT2))
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_dl_fatal_printf ("\
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Fatal glibc error: CPU lacks VXRS_EXT2 support (z15 or later required)\n");
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# elif __ARCH__ >= 12
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if (!(GLRO(dl_hwcap) & HWCAP_S390_VXE))
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_dl_fatal_printf ("\
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Fatal glibc error: CPU lacks VXE support (z14 or later required)\n");
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# endif
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#endif /* __ARCH__ */
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}
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#endif /* _DL_HWCAP_CHECK_H */
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