[linux-seccomp.git] / libseccomp / src / arch-syscall-validate

#!/bin/bash

#
# libseccomp syscall validation script
#
# Copyright (c) 2014 Red Hat <pmoore@redhat.com>
# Author: Paul Moore <paul@paul-moore.com>
#

#
# This library is free software; you can redistribute it and/or modify it
# under the terms of version 2.1 of the GNU Lesser General Public License as
# published by the Free Software Foundation.
#
# This 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 this library; if not, see <http://www.gnu.org/licenses>.
#

LIB_SYS_DUMP="./arch-syscall-dump"

####
# functions

#
# Dependency check
#
# Arguments:
#     1    Dependency to check for
#
function check_deps() {
	[[ -z "$1" ]] && return
	which "$1" >& /dev/null
	return $?
}

#
# Dependency verification
#
# Arguments:
#     1    Dependency to check for
#
function verify_deps() {
	[[ -z "$1" ]] && return
	if ! check_deps "$1"; then
		echo "error: install \"$1\" and include it in your \$PATH"
		exit 1
	fi
}

#
# Print out script usage details
#
function usage() {
cat << EOF
usage: arch-syscall-validate [-h] [-a <arch>] <kernel_directory>

libseccomp syscall validation script
optional arguments:
  -h             show this help message and exit
  -a             architecture
  -l             output the library's syscall definitions
  -s             output the system's syscall definitions
EOF
}

#
# Dump the library syscall table for a given architecture
#
# Arguments:
#     1    architecture
#     2    offset (optional)
#
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_arch() {
	local offset_str=""

	[[ -z $1 ]] && return

	[[ -n $2 ]] && offset_str="-o $2"
	$LIB_SYS_DUMP -a $1 $offset_str | sed -e '/[^\t]\+\t-[0-9]\+/d'
}

#
# Dump the x86 system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_x86() {
	cat $1/arch/x86/entry/syscalls/syscall_32.tbl | \
		grep -v "^#" | awk '{ print $3"\t"$1 }' | sed '/^[ \t]*$/d' | \
		sort
}

#
# Dump the x86 library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_x86() {
	dump_lib_arch x86
}

#
# Dump the x86_64 system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_x86_64() {
	cat $1/arch/x86/entry/syscalls/syscall_64.tbl | \
		grep -v "^#" | awk '{ print $2,$3,$1 }' | sed -e '/^x32/d' | \
		awk '{ print $2"\t"$3 }' | sed '/^[ \t]*$/d' | sort
}

#
# Dump the x86_64 library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_x86_64() {
	dump_lib_arch x86_64
}

#
# Dump the x32 system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_x32() {
	cat $1/arch/x86/entry/syscalls/syscall_64.tbl | \
		grep -v "^#" | awk '{ print $2,$3,$1 }' | sed -e '/^64/d' | \
		awk '{ print $2"\t"$3 }' | sed '/^[ \t]*$/d' | sort
}

#
# Dump the x32 library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_x32() {
	# 1073741824 == 0x40000000
	dump_lib_arch x32 1073741824
}

#
# Dump the arm system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_arm() {
	# NOTE: arm_sync_file_range() and sync_file_range2() share values
	gcc -E -dM -D__ARM_EABI__ $1/arch/arm/include/uapi/asm/unistd.h | \
		grep "^#define __\(ARM_\)*NR_" | \
		grep -v "^#define __NR_OABI_SYSCALL_BASE" | \
		grep -v "^#define __NR_SYSCALL_BASE" | \
		grep -v "^#define __ARM_NR_BASE" | \
		sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_SYSCALL_BASE[ \t]*+[ \t]*\([0-9]\+\)).*/\1\t\2/;s/#define[ \t]\+__ARM_NR_\([^ \t]\+\)[ \t]\+(__ARM_NR_BASE[ \t]*+[ \t]*\([0-9]\+\)).*/\1\t983040 + \2/' | \
		while read line; do \
			if echo "$line" | grep -q "+"; then \
				echo "$line" | awk '{ print $1"\t"$2+$4 }'; \
			else \
				echo "$line"; \
			fi; \
		done | \
		sed -e '/#define __NR_sync_file_range2[ \t]\+__NR_arm_sync_file_range/d' | \
		sort
}

#
# Dump the arm library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_arm() {
	# NOTE: arm_sync_file_range() and sync_file_range2() share values
	dump_lib_arch arm | sed -e '/sync_file_range2[ \t]\+341/d'
}

#
# Dump the aarch64 system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_aarch64() {
	gcc -E -dM -I$1/include/uapi -D__BITS_PER_LONG=64 $1/include/uapi/asm-generic/unistd.h | \
		grep "^#define __NR_" | \
		sed -e '/__NR_syscalls/d' | \
		sed -e '/__NR_arch_specific_syscall/d' | \
		sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+\(.*\)/\1\t\2/' | \
		sed -e 's/__NR3264_statfs/43/' | \
		sed -e 's/__NR3264_ftruncate/46/' | \
		sed -e 's/__NR3264_truncate/45/' | \
		sed -e 's/__NR3264_lseek/62/' | \
		sed -e 's/__NR3264_sendfile/71/' | \
		sed -e 's/__NR3264_fstatat/79/' | \
		sed -e 's/__NR3264_fstatfs/44/' | \
		sed -e 's/__NR3264_fcntl/25/' | \
		sed -e 's/__NR3264_fadvise64/223/' | \
		sed -e 's/__NR3264_mmap/222/' | \
		sed -e 's/__NR3264_fstat/80/' | \
		sed -e 's/__NR3264_lstat/1039/' | \
		sed -e 's/__NR3264_stat/1038/' | \
		sort
}

#
# Dump the aarch64 library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_aarch64() {
	dump_lib_arch aarch64
}

#
# Dump the mips system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_mips() {
	# _MIPS_SIM values:
	#   _MIPS_SIM_ABI32 == 1
	#   _MIPS_SIM_NABI32 == 2
	#   _MIPS_SIM_ABI64 == 3
	gcc -E -dM -I$1/arch/mips/include/uapi -D_MIPS_SIM=1 $1/arch/mips/include/uapi/asm/unistd.h | \
		grep "^#define __NR_" | \
		grep -v "^#define __NR_O32_" | \
		grep -v "^#define __NR_N32_" | \
		grep -v "^#define __NR_64_" | \
		grep -v "^#define __NR_Linux" | \
		grep -v "^#define __NR_unused" | \
		grep -v "^#define __NR_reserved" | \
		sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_Linux[ \t]*+[ \t]*\([0-9]\+\)).*/\1\t\2/' | \
		sort
}

#
# Dump the mips library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_mips() {
	dump_lib_arch mips 4000
}

#
# Dump the mips64 system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_mips64() {
	# _MIPS_SIM values:
	#   _MIPS_SIM_ABI32 == 1
	#   _MIPS_SIM_NABI32 == 2
	#   _MIPS_SIM_ABI64 == 3
	gcc -E -dM -I$1/arch/mips/include/uapi -D_MIPS_SIM=3 $1/arch/mips/include/uapi/asm/unistd.h | \
		grep "^#define __NR_" | \
		grep -v "^#define __NR_O32_" | \
		grep -v "^#define __NR_N32_" | \
		grep -v "^#define __NR_64_" | \
		grep -v "^#define __NR_Linux" | \
		grep -v "^#define __NR_unused" | \
		grep -v "^#define __NR_reserved" | \
		sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_Linux[ \t]*+[ \t]*\([0-9]\+\)).*/\1\t\2/' | \
		sort
}

#
# Dump the mips64 library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_mips64() {
	dump_lib_arch mips64 5000
}

#
# Dump the mips64n32 system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_mips64n32() {
	# _MIPS_SIM values:
	#   _MIPS_SIM_ABI32 == 1
	#   _MIPS_SIM_NABI32 == 2
	#   _MIPS_SIM_ABI64 == 3
	gcc -E -dM -I$1/arch/mips/include/uapi -D_MIPS_SIM=2 $1/arch/mips/include/uapi/asm/unistd.h | \
		grep "^#define __NR_" | \
		grep -v "^#define __NR_O32_" | \
		grep -v "^#define __NR_N32_" | \
		grep -v "^#define __NR_64_" | \
		grep -v "^#define __NR_Linux" | \
		grep -v "^#define __NR_unused" | \
		grep -v "^#define __NR_reserved" | \
		sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_Linux[ \t]*+[ \t]*\([0-9]\+\)).*/\1\t\2/' | \
		sort
}

#
# Dump the mips64n32 library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_mips64n32() {
	dump_lib_arch mips64n32 6000
}

#
# Dump the ppc system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_ppc() {
	gcc -E -dM $1/arch/powerpc/include/uapi/asm/unistd.h | \
		grep "^#define __NR_" | \
		sed -e 's/#define[ \t]\+__NR_\([a-z0-9_]\+\)[ \t]\+\([0-9]\+\)/\1\t\2/' | \
		sort
}

#
# Dump the ppc library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_ppc() {
	dump_lib_arch ppc
}

#
# Dump the ppc64 system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_ppc64() {
	gcc -E -dM -D__powerpc64__ $1/arch/powerpc/include/uapi/asm/unistd.h | \
		grep "^#define __NR_" | \
		sed -e 's/#define[ \t]\+__NR_\([a-z0-9_]\+\)[ \t]\+\([0-9]\+\)/\1\t\2/' | \
		sort
}

#
# Dump the ppc64 library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_ppc64() {
	dump_lib_arch ppc64
}

#
# Dump the s390 system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_s390() {
	gcc -E -dM $1/arch/s390/include/uapi/asm/unistd.h | grep __NR | \
		sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_timer_create[ \t]*+[ \t]*\([0-9]\+\)).*/\1\t254 + \2/' | \
		while read line; do \
			if echo "$line" | grep -q "+"; then \
				echo "$line" | awk '{ print $1"\t"$2+$4 }'; \
			else \
				echo "$line"; \
			fi; \
		done | \
		sed 's/#define __NR_//g' | sed 's/ /\t/g' | sort
}

#
# Dump the s390 library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_s390() {
	dump_lib_arch s390
}

#
# Dump the s390x system syscall table
#
# Arguments:
#     1    path to the kernel source
#
#  Dump the architecture's syscall table to stdout.
#
function dump_sys_s390x() {
	gcc -E -dM -D __s390x__ $1/arch/s390/include/uapi/asm/unistd.h | grep __NR | \
		sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_timer_create[ \t]*+[ \t]*\([0-9]\+\)).*/\1\t254 + \2/' | \
		while read line; do \
			if echo "$line" | grep -q "+"; then \
				echo "$line" | awk '{ print $1"\t"$2+$4 }'; \
			else \
				echo "$line"; \
			fi; \
		done | \
		sed 's/#define __NR_//g' | sed 's/ /\t/g' | sort
}

#
# Dump the s390x library syscall table
#
#  Dump the library's syscall table to stdout.
#
function dump_lib_s390x() {
	dump_lib_arch s390x
}

#
# Dump the system syscall table
#
# Arguments:
#     1    architecture
#     2    path to the kernel source
#
#  Dump the system's syscall table to stdout using the given architecture.
#
function dump_sys() {
	case $1 in
	x86)
		dump_sys_x86 "$2"
		;;
	x86_64)
		dump_sys_x86_64 "$2"
		;;
	x32)
		dump_sys_x32 "$2"
		;;
	arm)
		dump_sys_arm "$2"
		;;
	aarch64)
		dump_sys_aarch64 "$2"
		;;
	mips)
		dump_sys_mips "$2"
		;;
	mips64)
		dump_sys_mips64 "$2"
		;;
	mips64n32)
		dump_sys_mips64n32 "$2"
		;;
	ppc)
		dump_sys_ppc "$2"
		;;
	ppc64)
		dump_sys_ppc64 "$2"
		;;
	s390)
		dump_sys_s390 "$2"
		;;
	s390x)
		dump_sys_s390x "$2"
		;;
	*)
		echo ""
		return 1
		;;
	esac

	return 0
}

#
# Dump the library syscall table
#
# Arguments:
#     1    architecture
#
#  Dump the library's syscall table to stdout using the given architecture.
#
function dump_lib() {
	case $1 in
	x86)
		dump_lib_x86
		;;
	x86_64)
		dump_lib_x86_64
		;;
	x32)
		dump_lib_x32
		;;
	arm)
		dump_lib_arm
		;;
	aarch64)
		dump_lib_aarch64
		;;
	mips)
		dump_lib_mips
		;;
	mips64)
		dump_lib_mips64
		;;
	mips64n32)
		dump_lib_mips64n32
		;;
	ppc)
		dump_lib_ppc "$2"
		;;
	ppc64)
		dump_lib_ppc64 "$2"
		;;
	s390)
		dump_lib_s390 "$2"
		;;
	s390x)
		dump_lib_s390x "$2"
		;;
	*)
		echo ""
		return 1
		;;
	esac

	return 0
}

####
# main

verify_deps diff
verify_deps gcc
verify_deps grep
verify_deps mktemp
verify_deps sed
if [[ ! -x $LIB_SYS_DUMP ]]; then
	echo "error: \"$LIB_SYS_DUMP\" is not in the current working directory"
	exit 1
fi

opt_arches=""
opt_sys=""
opt_lib=""

while getopts "a:slh" opt; do
	case $opt in
	a)
		opt_arches+="$OPTARG "
		;;
	s)
		opt_sys=1
		opt_lib=0
		;;
	l)
		opt_sys=0
		opt_lib=1
		;;
	h|*)
		usage
		exit 1
		;;
	esac
done
shift $(($OPTIND - 1))

# defaults
if [[ $opt_arches == "" ]]; then
	opt_arches=" \
		x86 x86_64 x32 \
		arm aarch64 \
		mips mips64 mips64n32 \
		ppc ppc64 \
		s390 s390x"
fi

# sanity checks
kernel_dir="$1"
if [[ -z $kernel_dir ]]; then
	usage
	exit 1
fi
if [[ ! -d $kernel_dir ]]; then
	echo "error: \"$1\" is not a valid directory"
	exit 1
fi

# generate some temp files
tmp_lib=$(mktemp -t syscall_validate_XXXXXX)
tmp_sys=$(mktemp -t syscall_validate_XXXXXX)

# loop through the architectures and compare
for i in $opt_arches; do
	# dump the syscall tables
	dump_lib $i > $tmp_lib
	if [[ $? -ne 0 ]]; then
		echo "error: unknown arch $i"
		exit 1
	fi
	dump_sys $i "$kernel_dir" > $tmp_sys
	if [[ $? -ne 0 ]]; then
		echo "error: unknown arch $i"
		exit 1
	fi

	if [[ $opt_lib -eq 1 ]]; then
		cat $tmp_lib
	elif [[ $opt_sys -eq 1 ]]; then
		cat $tmp_sys
	else
		#  compare the lib and sys output
		diff -u --label="$i [library]" $tmp_lib \
			--label "$i [system]" $tmp_sys
	fi
done

# cleanup and exit
rm -f $tmp_lib $tmp_sys

exit 0
Commit	Line	Data
8befd5cc MG	1	#!/bin/bash
	2
	3	#
	4	# libseccomp syscall validation script
	5	#
	6	# Copyright (c) 2014 Red Hat <pmoore@redhat.com>
	7	# Author: Paul Moore <paul@paul-moore.com>
	8	#
	9
	10	#
	11	# This library is free software; you can redistribute it and/or modify it
	12	# under the terms of version 2.1 of the GNU Lesser General Public License as
	13	# published by the Free Software Foundation.
	14	#
	15	# This library is distributed in the hope that it will be useful, but WITHOUT
	16	# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	17	# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
	18	# for more details.
	19	#
	20	# You should have received a copy of the GNU Lesser General Public License
	21	# along with this library; if not, see <http://www.gnu.org/licenses>.
	22	#
	23
	24	LIB_SYS_DUMP="./arch-syscall-dump"
	25
	26	####
	27	# functions
	28
	29	#
	30	# Dependency check
	31	#
	32	# Arguments:
	33	# 1 Dependency to check for
	34	#
	35	function check_deps() {
	36	[[ -z "$1" ]] && return
	37	which "$1" >& /dev/null
	38	return $?
	39	}
	40
	41	#
	42	# Dependency verification
	43	#
	44	# Arguments:
	45	# 1 Dependency to check for
	46	#
	47	function verify_deps() {
	48	[[ -z "$1" ]] && return
	49	if ! check_deps "$1"; then
	50	echo "error: install \"$1\" and include it in your \$PATH"
	51	exit 1
	52	fi
	53	}
	54
	55	#
	56	# Print out script usage details
	57	#
	58	function usage() {
	59	cat << EOF
	60	usage: arch-syscall-validate [-h] [-a <arch>] <kernel_directory>
	61
	62	libseccomp syscall validation script
	63	optional arguments:
	64	-h show this help message and exit
65	-a architecture
66	-l output the library's syscall definitions
67	-s output the system's syscall definitions
68	EOF
69	}
70
71	#
72	# Dump the library syscall table for a given architecture
73	#
74	# Arguments:
75	# 1 architecture
76	# 2 offset (optional)
77	#
78	#
79	# Dump the library's syscall table to stdout.
80	#
81	function dump_lib_arch() {
82	local offset_str=""
83
84	[[ -z $1 ]] && return
85
86	[[ -n $2 ]] && offset_str="-o $2"
87	$LIB_SYS_DUMP -a $1 $offset_str \| sed -e '/[^\t]\+\t-[0-9]\+/d'
88	}
89
90	#
91	# Dump the x86 system syscall table
92	#
93	# Arguments:
94	# 1 path to the kernel source
95	#
96	# Dump the architecture's syscall table to stdout.
97	#
98	function dump_sys_x86() {
99	cat $1/arch/x86/entry/syscalls/syscall_32.tbl \| \
100	grep -v "^#" \| awk '{ print $3"\t"$1 }' \| sed '/^[ \t]*$/d' \| \
101	sort
102	}
103
104	#
105	# Dump the x86 library syscall table
106	#
107	# Dump the library's syscall table to stdout.
108	#
109	function dump_lib_x86() {
110	dump_lib_arch x86
111	}
112
113	#
114	# Dump the x86_64 system syscall table
115	#
116	# Arguments:
117	# 1 path to the kernel source
118	#
119	# Dump the architecture's syscall table to stdout.
120	#
121	function dump_sys_x86_64() {
122	cat $1/arch/x86/entry/syscalls/syscall_64.tbl \| \
123	grep -v "^#" \| awk '{ print $2,$3,$1 }' \| sed -e '/^x32/d' \| \
124	awk '{ print $2"\t"$3 }' \| sed '/^[ \t]*$/d' \| sort
125	}
126
127	#
128	# Dump the x86_64 library syscall table
129	#
130	# Dump the library's syscall table to stdout.
131	#
132	function dump_lib_x86_64() {
133	dump_lib_arch x86_64
134	}
135
136	#
137	# Dump the x32 system syscall table
138	#
139	# Arguments:
140	# 1 path to the kernel source
141	#
142	# Dump the architecture's syscall table to stdout.
143	#
144	function dump_sys_x32() {
145	cat $1/arch/x86/entry/syscalls/syscall_64.tbl \| \
146	grep -v "^#" \| awk '{ print $2,$3,$1 }' \| sed -e '/^64/d' \| \
147	awk '{ print $2"\t"$3 }' \| sed '/^[ \t]*$/d' \| sort
148	}
149
150	#
151	# Dump the x32 library syscall table
152	#
153	# Dump the library's syscall table to stdout.
154	#
155	function dump_lib_x32() {
156	# 1073741824 == 0x40000000
157	dump_lib_arch x32 1073741824
158	}
159
160	#
161	# Dump the arm system syscall table
162	#
163	# Arguments:
164	# 1 path to the kernel source
165	#
166	# Dump the architecture's syscall table to stdout.
167	#
168	function dump_sys_arm() {
169	# NOTE: arm_sync_file_range() and sync_file_range2() share values
170	gcc -E -dM -D__ARM_EABI__ $1/arch/arm/include/uapi/asm/unistd.h \| \
171	grep "^#define __\(ARM_\)*NR_" \| \
172	grep -v "^#define __NR_OABI_SYSCALL_BASE" \| \
173	grep -v "^#define __NR_SYSCALL_BASE" \| \
174	grep -v "^#define __ARM_NR_BASE" \| \
175	sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_SYSCALL_BASE[ \t]+[ \t]\([0-9]\+\))./\1\t\2/;s/#define[ \t]\+__ARM_NR_\([^ \t]\+\)[ \t]\+(__ARM_NR_BASE[ \t]+[ \t]\([0-9]\+\))./\1\t983040 + \2/' \| \
176	while read line; do \
177	if echo "$line" \| grep -q "+"; then \
178	echo "$line" \| awk '{ print $1"\t"$2+$4 }'; \
179	else \
180	echo "$line"; \
181	fi; \
182	done \| \
183	sed -e '/#define __NR_sync_file_range2[ \t]\+__NR_arm_sync_file_range/d' \| \
184	sort
185	}
186
187	#
188	# Dump the arm library syscall table
189	#
190	# Dump the library's syscall table to stdout.
191	#
192	function dump_lib_arm() {
193	# NOTE: arm_sync_file_range() and sync_file_range2() share values
194	dump_lib_arch arm \| sed -e '/sync_file_range2[ \t]\+341/d'
195	}
196
197	#
198	# Dump the aarch64 system syscall table
199	#
200	# Arguments:
201	# 1 path to the kernel source
202	#
203	# Dump the architecture's syscall table to stdout.
204	#
205	function dump_sys_aarch64() {
206	gcc -E -dM -I$1/include/uapi -D__BITS_PER_LONG=64 $1/include/uapi/asm-generic/unistd.h \| \
207	grep "^#define __NR_" \| \
208	sed -e '/__NR_syscalls/d' \| \
209	sed -e '/__NR_arch_specific_syscall/d' \| \
210	sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+\(.*\)/\1\t\2/' \| \
211	sed -e 's/__NR3264_statfs/43/' \| \
212	sed -e 's/__NR3264_ftruncate/46/' \| \
213	sed -e 's/__NR3264_truncate/45/' \| \
214	sed -e 's/__NR3264_lseek/62/' \| \
215	sed -e 's/__NR3264_sendfile/71/' \| \
216	sed -e 's/__NR3264_fstatat/79/' \| \
217	sed -e 's/__NR3264_fstatfs/44/' \| \
218	sed -e 's/__NR3264_fcntl/25/' \| \
219	sed -e 's/__NR3264_fadvise64/223/' \| \
220	sed -e 's/__NR3264_mmap/222/' \| \
221	sed -e 's/__NR3264_fstat/80/' \| \
222	sed -e 's/__NR3264_lstat/1039/' \| \
223	sed -e 's/__NR3264_stat/1038/' \| \
224	sort
225	}
226
227	#
228	# Dump the aarch64 library syscall table
229	#
230	# Dump the library's syscall table to stdout.
231	#
232	function dump_lib_aarch64() {
233	dump_lib_arch aarch64
234	}
235
236	#
237	# Dump the mips system syscall table
238	#
239	# Arguments:
240	# 1 path to the kernel source
241	#
242	# Dump the architecture's syscall table to stdout.
243	#
244	function dump_sys_mips() {
245	# _MIPS_SIM values:
246	# _MIPS_SIM_ABI32 == 1
247	# _MIPS_SIM_NABI32 == 2
248	# _MIPS_SIM_ABI64 == 3
249	gcc -E -dM -I$1/arch/mips/include/uapi -D_MIPS_SIM=1 $1/arch/mips/include/uapi/asm/unistd.h \| \
250	grep "^#define __NR_" \| \
251	grep -v "^#define __NR_O32_" \| \
252	grep -v "^#define __NR_N32_" \| \
253	grep -v "^#define __NR_64_" \| \
254	grep -v "^#define __NR_Linux" \| \
255	grep -v "^#define __NR_unused" \| \
256	grep -v "^#define __NR_reserved" \| \
257	sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_Linux[ \t]+[ \t]\([0-9]\+\)).*/\1\t\2/' \| \
258	sort
259	}
260
261	#
262	# Dump the mips library syscall table
263	#
264	# Dump the library's syscall table to stdout.
265	#
266	function dump_lib_mips() {
267	dump_lib_arch mips 4000
268	}
269
270	#
271	# Dump the mips64 system syscall table
272	#
273	# Arguments:
274	# 1 path to the kernel source
275	#
276	# Dump the architecture's syscall table to stdout.
277	#
278	function dump_sys_mips64() {
279	# _MIPS_SIM values:
280	# _MIPS_SIM_ABI32 == 1
281	# _MIPS_SIM_NABI32 == 2
282	# _MIPS_SIM_ABI64 == 3
283	gcc -E -dM -I$1/arch/mips/include/uapi -D_MIPS_SIM=3 $1/arch/mips/include/uapi/asm/unistd.h \| \
284	grep "^#define __NR_" \| \
285	grep -v "^#define __NR_O32_" \| \
286	grep -v "^#define __NR_N32_" \| \
287	grep -v "^#define __NR_64_" \| \
288	grep -v "^#define __NR_Linux" \| \
289	grep -v "^#define __NR_unused" \| \
290	grep -v "^#define __NR_reserved" \| \
291	sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_Linux[ \t]+[ \t]\([0-9]\+\)).*/\1\t\2/' \| \
292	sort
293	}
294
295	#
296	# Dump the mips64 library syscall table
297	#
298	# Dump the library's syscall table to stdout.
299	#
300	function dump_lib_mips64() {
301	dump_lib_arch mips64 5000
302	}
303
304	#
305	# Dump the mips64n32 system syscall table
306	#
307	# Arguments:
308	# 1 path to the kernel source
309	#
310	# Dump the architecture's syscall table to stdout.
311	#
312	function dump_sys_mips64n32() {
313	# _MIPS_SIM values:
314	# _MIPS_SIM_ABI32 == 1
315	# _MIPS_SIM_NABI32 == 2
316	# _MIPS_SIM_ABI64 == 3
317	gcc -E -dM -I$1/arch/mips/include/uapi -D_MIPS_SIM=2 $1/arch/mips/include/uapi/asm/unistd.h \| \
318	grep "^#define __NR_" \| \
319	grep -v "^#define __NR_O32_" \| \
320	grep -v "^#define __NR_N32_" \| \
321	grep -v "^#define __NR_64_" \| \
322	grep -v "^#define __NR_Linux" \| \
323	grep -v "^#define __NR_unused" \| \
324	grep -v "^#define __NR_reserved" \| \
325	sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_Linux[ \t]+[ \t]\([0-9]\+\)).*/\1\t\2/' \| \
326	sort
327	}
328
329	#
330	# Dump the mips64n32 library syscall table
331	#
332	# Dump the library's syscall table to stdout.
333	#
334	function dump_lib_mips64n32() {
335	dump_lib_arch mips64n32 6000
336	}
337
338	#
339	# Dump the ppc system syscall table
340	#
341	# Arguments:
342	# 1 path to the kernel source
343	#
344	# Dump the architecture's syscall table to stdout.
345	#
346	function dump_sys_ppc() {
347	gcc -E -dM $1/arch/powerpc/include/uapi/asm/unistd.h \| \
348	grep "^#define __NR_" \| \
349	sed -e 's/#define[ \t]\+__NR_\([a-z0-9_]\+\)[ \t]\+\([0-9]\+\)/\1\t\2/' \| \
350	sort
351	}
352
353	#
354	# Dump the ppc library syscall table
355	#
356	# Dump the library's syscall table to stdout.
357	#
358	function dump_lib_ppc() {
359	dump_lib_arch ppc
360	}
361
362	#
363	# Dump the ppc64 system syscall table
364	#
365	# Arguments:
366	# 1 path to the kernel source
367	#
368	# Dump the architecture's syscall table to stdout.
369	#
370	function dump_sys_ppc64() {
371	gcc -E -dM -D__powerpc64__ $1/arch/powerpc/include/uapi/asm/unistd.h \| \
372	grep "^#define __NR_" \| \
373	sed -e 's/#define[ \t]\+__NR_\([a-z0-9_]\+\)[ \t]\+\([0-9]\+\)/\1\t\2/' \| \
374	sort
375	}
376
377	#
378	# Dump the ppc64 library syscall table
379	#
380	# Dump the library's syscall table to stdout.
381	#
382	function dump_lib_ppc64() {
383	dump_lib_arch ppc64
384	}
385
386	#
387	# Dump the s390 system syscall table
388	#
389	# Arguments:
390	# 1 path to the kernel source
391	#
392	# Dump the architecture's syscall table to stdout.
393	#
394	function dump_sys_s390() {
395	gcc -E -dM $1/arch/s390/include/uapi/asm/unistd.h \| grep __NR \| \
396	sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_timer_create[ \t]+[ \t]\([0-9]\+\)).*/\1\t254 + \2/' \| \
397	while read line; do \
398	if echo "$line" \| grep -q "+"; then \
399	echo "$line" \| awk '{ print $1"\t"$2+$4 }'; \
400	else \
401	echo "$line"; \
402	fi; \
403	done \| \
404	sed 's/#define __NR_//g' \| sed 's/ /\t/g' \| sort
405	}
406
407	#
408	# Dump the s390 library syscall table
409	#
410	# Dump the library's syscall table to stdout.
411	#
412	function dump_lib_s390() {
413	dump_lib_arch s390
414	}
415
416	#
417	# Dump the s390x system syscall table
418	#
419	# Arguments:
420	# 1 path to the kernel source
421	#
422	# Dump the architecture's syscall table to stdout.
423	#
424	function dump_sys_s390x() {
425	gcc -E -dM -D __s390x__ $1/arch/s390/include/uapi/asm/unistd.h \| grep __NR \| \
426	sed -e 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+(__NR_timer_create[ \t]+[ \t]\([0-9]\+\)).*/\1\t254 + \2/' \| \
427	while read line; do \
428	if echo "$line" \| grep -q "+"; then \
429	echo "$line" \| awk '{ print $1"\t"$2+$4 }'; \
430	else \
431	echo "$line"; \
432	fi; \
433	done \| \
434	sed 's/#define __NR_//g' \| sed 's/ /\t/g' \| sort
435	}
436
437	#
438	# Dump the s390x library syscall table
439	#
440	# Dump the library's syscall table to stdout.
441	#
442	function dump_lib_s390x() {
443	dump_lib_arch s390x
444	}
445
446	#
447	# Dump the system syscall table
448	#
449	# Arguments:
450	# 1 architecture
451	# 2 path to the kernel source
452	#
453	# Dump the system's syscall table to stdout using the given architecture.
454	#
455	function dump_sys() {
456	case $1 in
457	x86)
458	dump_sys_x86 "$2"
459	;;
460	x86_64)
461	dump_sys_x86_64 "$2"
462	;;
463	x32)
464	dump_sys_x32 "$2"
465	;;
466	arm)
467	dump_sys_arm "$2"
468	;;
469	aarch64)
470	dump_sys_aarch64 "$2"
471	;;
472	mips)
473	dump_sys_mips "$2"
474	;;
475	mips64)
476	dump_sys_mips64 "$2"
477	;;
478	mips64n32)
479	dump_sys_mips64n32 "$2"
480	;;
481	ppc)
482	dump_sys_ppc "$2"
483	;;
484	ppc64)
485	dump_sys_ppc64 "$2"
486	;;
487	s390)
488	dump_sys_s390 "$2"
489	;;
490	s390x)
491	dump_sys_s390x "$2"
492	;;
493	*)
494	echo ""
495	return 1
496	;;
497	esac
498
499	return 0
500	}
501
502	#
503	# Dump the library syscall table
504	#
505	# Arguments:
506	# 1 architecture
507	#
508	# Dump the library's syscall table to stdout using the given architecture.
509	#
510	function dump_lib() {
511	case $1 in
512	x86)
513	dump_lib_x86
514	;;
515	x86_64)
516	dump_lib_x86_64
517	;;
518	x32)
519	dump_lib_x32
520	;;
521	arm)
522	dump_lib_arm
523	;;
524	aarch64)
525	dump_lib_aarch64
526	;;
527	mips)
528	dump_lib_mips
529	;;
530	mips64)
531	dump_lib_mips64
532	;;
533	mips64n32)
534	dump_lib_mips64n32
535	;;
536	ppc)
537	dump_lib_ppc "$2"
538	;;
539	ppc64)
540	dump_lib_ppc64 "$2"
541	;;
542	s390)
543	dump_lib_s390 "$2"
544	;;
545	s390x)
546	dump_lib_s390x "$2"
547	;;
548	*)
549	echo ""
550	return 1
551	;;
552	esac
553
554	return 0
555	}
556
557	####
558	# main
559
560	verify_deps diff
561	verify_deps gcc
562	verify_deps grep
563	verify_deps mktemp
564	verify_deps sed
565	if [[ ! -x $LIB_SYS_DUMP ]]; then
566	echo "error: \"$LIB_SYS_DUMP\" is not in the current working directory"
567	exit 1
568	fi
569
570	opt_arches=""
571	opt_sys=""
572	opt_lib=""
573
574	while getopts "a:slh" opt; do
575	case $opt in
576	a)
577	opt_arches+="$OPTARG "
578	;;
579	s)
580	opt_sys=1
581	opt_lib=0
582	;;
583	l)
584	opt_sys=0
585	opt_lib=1
586	;;
587	h\|*)
588	usage
589	exit 1
590	;;
591	esac
592	done
593	shift $(($OPTIND - 1))
594
595	# defaults
596	if [[ $opt_arches == "" ]]; then
597	opt_arches=" \
598	x86 x86_64 x32 \
599	arm aarch64 \
600	mips mips64 mips64n32 \
601	ppc ppc64 \
602	s390 s390x"
603	fi
604
605	# sanity checks
606	kernel_dir="$1"
607	if [[ -z $kernel_dir ]]; then
608	usage
609	exit 1
610	fi
611	if [[ ! -d $kernel_dir ]]; then
612	echo "error: \"$1\" is not a valid directory"
613	exit 1
614	fi
615
616	# generate some temp files
617	tmp_lib=$(mktemp -t syscall_validate_XXXXXX)
618	tmp_sys=$(mktemp -t syscall_validate_XXXXXX)
619
620	# loop through the architectures and compare
621	for i in $opt_arches; do
622	# dump the syscall tables
623	dump_lib $i > $tmp_lib
624	if [[ $? -ne 0 ]]; then
625	echo "error: unknown arch $i"
626	exit 1
627	fi
628	dump_sys $i "$kernel_dir" > $tmp_sys
629	if [[ $? -ne 0 ]]; then
630	echo "error: unknown arch $i"
631	exit 1
632	fi
633
634	if [[ $opt_lib -eq 1 ]]; then
635	cat $tmp_lib
636	elif [[ $opt_sys -eq 1 ]]; then
637	cat $tmp_sys
638	else
639	# compare the lib and sys output
640	diff -u --label="$i [library]" $tmp_lib \
641	--label "$i [system]" $tmp_sys
642	fi
643	done
644
645	# cleanup and exit
646	rm -f $tmp_lib $tmp_sys
647
648	exit 0