| #!/bin/bash |
| # Consistency checks for the system call list |
| # Copyright (C) 2017-2018 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/>. |
| |
| export LC_ALL=C |
| set -e |
| set -o pipefail |
| |
| if test $# != 4; then |
| echo "error: wrong number of arguments: $#" |
| exit 1 |
| fi |
| |
| macros="$1" |
| list_nr="$2" |
| list_sys="$3" |
| GAWK="$4" |
| |
| linux_version="$("$GAWK" \ |
| '/#define LINUX_VERSION_CODE / {print $3}' < "$macros")" |
| glibc_linux_version="$("$GAWK" \ |
| '/#define __GLIBC_LINUX_VERSION_CODE / {print $3}' < "$macros")" |
| |
| echo "info: LINUX_VERSION_CODE: $linux_version" |
| echo "info: __GLIBC_LINUX_VERSION_CODE: $glibc_linux_version" |
| # Ignore the subrelease in the comparison. |
| if test $(expr "$glibc_linux_version" / 256) \ |
| -lt $(expr "$linux_version" / 256); then |
| echo "info: The kernel major/minor version is newer than the glibc version" |
| kernel_newer=true |
| else |
| kernel_newer=false |
| fi |
| echo |
| |
| errors=0 |
| |
| # Use getpid as a system call which is expected to be always defined. |
| # alpha uses getxpid instead, so it is permitted as an alternative. |
| if ! grep -E -q '^getx?pid$' -- "$list_nr"; then |
| echo "error: __NR_getpid not defined" |
| errors=1 |
| fi |
| if ! grep -E -q '^getx?pid$' -- "$list_sys"; then |
| echo "error: SYS_getpid not defined" |
| errors=1 |
| fi |
| |
| comm_1="$(mktemp)" |
| comm_2="$(mktemp)" |
| comm_result="$(mktemp)" |
| cleanup () { |
| rm -f -- "$comm_1" "$comm_2" "$comm_result" |
| } |
| trap cleanup 0 |
| |
| sort -o "$comm_1" -- "$list_nr" |
| sort -o "$comm_2" -- "$list_sys" |
| |
| # Check for missing SYS_* macros. |
| comm --check-order -2 -3 -- "$comm_1" "$comm_2" > "$comm_result" |
| if test -s "$comm_result"; then |
| echo "error: These system calls need to be added to syscall-names.list:" |
| cat -- "$comm_result" |
| # This is only an error if our version is older than the kernel |
| # version because we cannot predict future kernel development. |
| if $kernel_newer; then |
| echo |
| echo "warning: This error has been ignored because the glibc" |
| echo "warning: system call list is older than the kernel version." |
| else |
| errors=1 |
| fi |
| fi |
| |
| # Check for additional SYS_* macros. |
| comm --check-order -1 -3 -- "$comm_1" "$comm_2" > "$comm_result" |
| if test -s "$comm_result"; then |
| echo "error: The following system calls have unexpected SYS_* macros:" |
| cat -- "$comm_result" |
| errors=1 |
| fi |
| |
| exit "$errors" |