From 1805bf753f6fec9ccaeb305b748cfb9a26041d1c Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Wed, 19 May 2021 11:09:57 +0200 Subject: 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 Reviewed-by: Stefan Liebler --- sysdeps/s390/s390-64/dl-hwcap-check.h | 40 +++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 sysdeps/s390/s390-64/dl-hwcap-check.h (limited to 'sysdeps/s390') diff --git a/sysdeps/s390/s390-64/dl-hwcap-check.h b/sysdeps/s390/s390-64/dl-hwcap-check.h new file mode 100644 index 0000000000..87e18be6bd --- /dev/null +++ b/sysdeps/s390/s390-64/dl-hwcap-check.h @@ -0,0 +1,40 @@ +/* Check for hardware capabilities after HWCAP parsing. S390 version. + Copyright (C) 2021 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 + . */ + +#ifndef _DL_HWCAP_CHECK_H +#define _DL_HWCAP_CHECK_H + +#include + +static inline void +dl_hwcap_check (void) +{ +#if defined __ARCH__ +# if __ARCH__ >= 13 + if (!(GLRO(dl_hwcap) & HWCAP_S390_VXRS_EXT2)) + _dl_fatal_printf ("\ +Fatal glibc error: CPU lacks VXRS_EXT2 support (z15 or later required)\n"); +# elif __ARCH__ >= 12 + if (!(GLRO(dl_hwcap) & HWCAP_S390_VXE)) + _dl_fatal_printf ("\ +Fatal glibc error: CPU lacks VXE support (z14 or later required)\n"); +# endif +#endif /* __ARCH__ */ +} + +#endif /* _DL_HWCAP_CHECK_H */ -- cgit 1.4.1