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#!/usr/bin/python3
# Consistency checks for glibc system call lists.
# Copyright (C) 2020-2021 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
# <http://www.gnu.org/licenses/>.
import argparse
import sys
import glibcextract
import glibcsyscalls
def main():
"""The main entry point."""
parser = argparse.ArgumentParser(
description="System call list consistency checks")
parser.add_argument('--cc', metavar='CC', required=True,
help='C compiler (including options) to use')
parser.add_argument('syscall_numbers_list', metavar='PATH',
help='Path to the list of system call numbers')
parser.add_argument('syscall_names_list', metavar='PATH',
help='Path to the list of system call names')
args = parser.parse_args()
glibc_constants = glibcsyscalls.load_arch_syscall_header(
args.syscall_numbers_list)
with open(args.syscall_names_list) as inp:
glibc_names = glibcsyscalls.SyscallNamesList(inp)
kernel_constants = glibcsyscalls.kernel_constants(args.cc)
kernel_version = glibcsyscalls.linux_kernel_version(args.cc)
errors = 0
warnings = False
for name in glibc_constants.keys() & kernel_constants.keys():
if glibc_constants[name] != kernel_constants[name]:
print("error: syscall {!r} number mismatch: glibc={!r} kernel={!r}"
.format(name, glibc_constants[name], kernel_constants[name]))
errors = 1
# The architecture-specific list in the glibc tree must be a
# subset of the global list of system call names.
for name in glibc_constants.keys() - set(glibc_names.syscalls):
print("error: architecture syscall {!r} missing from global names list"
.format(name))
errors = 1
for name in glibc_constants.keys() - kernel_constants.keys():
print("info: glibc syscall {!r} not known to kernel".format(name))
warnings = True
# If the glibc-recorded kernel version is not older than the
# installed kernel headers, the glibc system call set must be a
# superset of the kernel system call set.
if glibc_names.kernel_version >= kernel_version:
for name in kernel_constants.keys() - glibc_constants.keys():
print("error: kernel syscall {!r} ({}) not known to glibc"
.format(name, kernel_constants[name]))
errors = 1
else:
for name in kernel_constants.keys() - glibc_constants.keys():
print("warning: kernel syscall {!r} ({}) not known to glibc"
.format(name, kernel_constants[name]))
warnings = True
if errors > 0 or warnings:
print("info: glibc tables are based on kernel version {}".format(
".".join(map(str, glibc_names.kernel_version))))
print("info: installed kernel headers are version {}".format(
".".join(map(str, kernel_version))))
sys.exit(errors)
if __name__ == '__main__':
main()
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