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1 | #!/usr/bin/python3 |
2 | # Test that glibc's sys/mman.h constants match the kernel's. | |
04277e02 | 3 | # Copyright (C) 2018-2019 Free Software Foundation, Inc. |
df648905 JM |
4 | # This file is part of the GNU C Library. |
5 | # | |
6 | # The GNU C Library is free software; you can redistribute it and/or | |
7 | # modify it under the terms of the GNU Lesser General Public | |
8 | # License as published by the Free Software Foundation; either | |
9 | # version 2.1 of the License, or (at your option) any later version. | |
10 | # | |
11 | # The GNU C Library is distributed in the hope that it will be useful, | |
12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | # Lesser General Public License for more details. | |
15 | # | |
16 | # You should have received a copy of the GNU Lesser General Public | |
17 | # License along with the GNU C Library; if not, see | |
18 | # <http://www.gnu.org/licenses/>. | |
19 | ||
20 | import argparse | |
21 | import sys | |
22 | ||
23 | import glibcextract | |
24 | ||
25 | ||
26 | def linux_kernel_version(cc): | |
27 | """Return the (major, minor) version of the Linux kernel headers.""" | |
28 | sym_data = ['#include <linux/version.h>', 'START', | |
29 | ('LINUX_VERSION_CODE', 'LINUX_VERSION_CODE')] | |
30 | val = glibcextract.compute_c_consts(sym_data, cc)['LINUX_VERSION_CODE'] | |
31 | val = int(val) | |
32 | return ((val & 0xff0000) >> 16, (val & 0xff00) >> 8) | |
33 | ||
34 | ||
35 | def main(): | |
36 | """The main entry point.""" | |
37 | parser = argparse.ArgumentParser( | |
38 | description="Test that glibc's sys/mman.h constants " | |
39 | "match the kernel's.") | |
40 | parser.add_argument('--cc', metavar='CC', | |
41 | help='C compiler (including options) to use') | |
42 | args = parser.parse_args() | |
43 | linux_version_headers = linux_kernel_version(args.cc) | |
44 | linux_version_glibc = (4, 19) | |
45 | sys.exit(glibcextract.compare_macro_consts( | |
46 | '#define _GNU_SOURCE 1\n' | |
47 | '#include <sys/mman.h>\n', | |
48 | '#define _GNU_SOURCE 1\n' | |
49 | '#include <linux/mman.h>\n', | |
50 | args.cc, | |
51 | 'MAP_.*', | |
52 | # A series of MAP_HUGE_<size> macros are defined by the kernel | |
53 | # but not by glibc. MAP_UNINITIALIZED is kernel-only. | |
54 | # MAP_FAILED is not a MAP_* flag and is glibc-only, as is the | |
55 | # MAP_ANON alias for MAP_ANONYMOUS. MAP_RENAME, MAP_AUTOGROW, | |
56 | # MAP_LOCAL and MAP_AUTORSRV are in the kernel header for | |
57 | # MIPS, marked as "not used by linux"; SPARC has MAP_INHERIT | |
58 | # in the kernel header, but does not use it. | |
59 | 'MAP_HUGE_[0-9].*|MAP_UNINITIALIZED|MAP_FAILED|MAP_ANON' | |
60 | '|MAP_RENAME|MAP_AUTOGROW|MAP_LOCAL|MAP_AUTORSRV|MAP_INHERIT', | |
61 | linux_version_glibc > linux_version_headers, | |
62 | linux_version_headers > linux_version_glibc)) | |
63 | ||
64 | if __name__ == '__main__': | |
65 | main() |