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- #!/usr/bin/python3
- # Test that glibc's sys/mman.h constants match the kernel's.
- # Copyright (C) 2018-2019 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
- # <http://www.gnu.org/licenses/>.
- import argparse
- import sys
- import glibcextract
- def linux_kernel_version(cc):
- """Return the (major, minor) version of the Linux kernel headers."""
- sym_data = ['#include <linux/version.h>', 'START',
- ('LINUX_VERSION_CODE', 'LINUX_VERSION_CODE')]
- val = glibcextract.compute_c_consts(sym_data, cc)['LINUX_VERSION_CODE']
- val = int(val)
- return ((val & 0xff0000) >> 16, (val & 0xff00) >> 8)
- def main():
- """The main entry point."""
- parser = argparse.ArgumentParser(
- description="Test that glibc's sys/mman.h constants "
- "match the kernel's.")
- parser.add_argument('--cc', metavar='CC',
- help='C compiler (including options) to use')
- args = parser.parse_args()
- linux_version_headers = linux_kernel_version(args.cc)
- linux_version_glibc = (4, 20)
- sys.exit(glibcextract.compare_macro_consts(
- '#define _GNU_SOURCE 1\n'
- '#include <sys/mman.h>\n',
- '#define _GNU_SOURCE 1\n'
- '#include <linux/mman.h>\n',
- args.cc,
- 'MAP_.*',
- # A series of MAP_HUGE_<size> macros are defined by the kernel
- # but not by glibc. MAP_UNINITIALIZED is kernel-only.
- # MAP_FAILED is not a MAP_* flag and is glibc-only, as is the
- # MAP_ANON alias for MAP_ANONYMOUS. MAP_RENAME, MAP_AUTOGROW,
- # MAP_LOCAL and MAP_AUTORSRV are in the kernel header for
- # MIPS, marked as "not used by linux"; SPARC has MAP_INHERIT
- # in the kernel header, but does not use it.
- 'MAP_HUGE_[0-9].*|MAP_UNINITIALIZED|MAP_FAILED|MAP_ANON'
- '|MAP_RENAME|MAP_AUTOGROW|MAP_LOCAL|MAP_AUTORSRV|MAP_INHERIT',
- linux_version_glibc > linux_version_headers,
- linux_version_headers > linux_version_glibc))
- if __name__ == '__main__':
- main()
|
