Add script to automatically generate syscalls

Signed-off-by: Andrea Cervesato <[email protected]>

include/lapi/syscalls/generate_syscalls.sh

@@ -0,0 +1,178 @@
+#!/bin/sh
+#
+# Script to generate the list of syscalls file for all architectures.
+# Based on https://github.com/hrw/syscalls-table/
+#
+# Author: Andrea Cervesato <[email protected]>
+
+if [ -z ${TMPDIR} ]; then
+	TMPDIR="/tmp"
+fi
+
+LINUX_SRC="$1"
+SYSCALLS_FILE="$2"
+
+SUPPORTED_ARCHS="${PWD}/supported-arch.txt"
+LINUX_HEADERS="${TMPDIR}/headers"
+SYSCALLS_NAMES="${TMPDIR}/syscalls-names.txt"
+GENERATOR_BIN="${TMPDIR}/list-syscalls"
+GENERATOR_SRC="${GENERATOR_BIN}.c"
+
+if [ -z ${LINUX_SRC} ]; then
+	echo "Give the path of Linux kernel sources:"
+	echo ""
+	echo "$0 linux/kernel/sources"
+	echo ""
+	exit 1
+fi
+
+if [ ! -e ${LINUX_SRC}/Makefile ]; then
+	echo "No Makefile in ${LINUX_SRC} directory!"
+	exit 1
+fi
+
+build_headers() {
+	arch="$1"
+
+	echo "Building linux headers..."
+
+	make -s -C ${LINUX_SRC} \
+		ARCH=${arch} \
+		O=${LINUX_HEADERS} \
+		headers_install >/dev/null
+}
+
+extract_syscalls() {
+	arch="$1"
+	flags="$2"
+	uppercase_arch=$(echo "$arch" | tr '[:lower:]' '[:upper:]')
+
+	echo "Extracting syscalls names..."
+
+	grep -E -h "^#define __NR_" \
+		${LINUX_HEADERS}/usr/include/asm/unistd*.h \
+		${LINUX_HEADERS}/usr/include/asm-generic/unistd.h > \
+		${TMPDIR}/syscalls-names.tosort
+
+	grep -E -v "(unistd.h|NR3264|__NR_syscall|__SC_COMP|__NR_.*Linux|__NR_FAST)" \
+		${TMPDIR}/syscalls-names.tosort |
+		grep -E -vi "(not implemented|available|unused|reserved|xtensa|spill)" |
+		grep -E -v "(__SYSCALL|SYSCALL_BASE|SYSCALL_MASK)" |
+		sed -e "s/#define\s*__NR_//g" -e "s/\s.*//g" >${SYSCALLS_NAMES}
+
+	echo "
+	#include <stdio.h>
+	#include <asm/unistd.h>
+
+	int main(void)
+	{
+	" > ${GENERATOR_SRC}
+
+	while IFS= read -r syscall
+	do
+		echo "
+	#ifdef __NR_$syscall
+		printf(\"$syscall\\t%d\\n\", __NR_$syscall);
+	#else
+		printf(\"$syscall\\n\");
+	#endif
+	" >> ${GENERATOR_SRC}
+	done <${SYSCALLS_NAMES}
+
+	echo " return 0;
+	}
+	" >> ${GENERATOR_SRC}
+
+	gcc ${GENERATOR_SRC} -U__LP64__ -U__ILP32__ -U__i386__ \
+		-D${uppercase_arch} -D__${arch}__ ${flags} \
+		-I ${LINUX_HEADERS}/usr/include/ \
+		-o ${GENERATOR_BIN} &>/dev/null
+
+
+	echo "Generating ${arch}.in ..."
+
+	${GENERATOR_BIN} > ${arch}.in
+}
+
+generate_syscalls() {
+	case $1 in
+	aarch64)
+		build_headers "arm64"
+		extract_syscalls "$1" "-D__ARM_EABI__"
+		;;
+	arc)
+		build_headers "arc"
+		extract_syscalls "$1" "-D__BITS_PER_LONG=32"
+		;;
+	arm)
+		build_headers "arm"
+		extract_syscalls "$1" "-D__BITS_PER_LONG=32"
+		;;
+	i386)
+		build_headers "x86"
+		extract_syscalls "$1" "-D__BITS_PER_LONG=32"
+		;;
+	loongarch)
+		build_headers "loongarch"
+		extract_syscalls "$1" "-D_LOONGARCH_SZLONG=64"
+		;;
+	mips_n32)
+		build_headers "mips"
+		extract_syscalls "$1" "-D_MIPS_SIM=_MIPS_SIM_NABI32"
+		;;
+	mips_n64)
+		build_headers "mips"
+		extract_syscalls "$1" "-D_MIPS_SIM=_MIPS_SIM_ABI64"
+		;;
+	mips_o32)
+		build_headers "mips"
+		extract_syscalls "$1" "-D_MIPS_SIM=_MIPS_SIM_ABI32"
+		;;
+	powerpc)
+		build_headers "powerpc"
+		extract_syscalls "$1" "-D__BITS_PER_LONG=32"
+		;;
+	powerpc64)
+		build_headers "powerpc"
+		extract_syscalls "$1" ""
+		;;
+	s390)
+		build_headers "s390"
+		extract_syscalls "$1" "-D__BITS_PER_LONG=32"
+		;;
+	s390x)
+		build_headers "s390"
+		extract_syscalls "$1" ""
+		;;
+	sh)
+		build_headers "sh"
+		extract_syscalls "$1" "-D__BITS_PER_LONG=32"
+		;;
+	sparc)
+		build_headers "sparc"
+		extract_syscalls "$1" "-D__32bit_syscall_numbers__ -D__BITS_PER_LONG=32"
+		;;
+	sparc64)
+		build_headers "sparc64"
+		extract_syscalls "$1" "-D__arch64__"
+		;;
+	x86_64)
+		build_headers "x86_64"
+		extract_syscalls "$1" "-D__LP64__"
+		;;
+	hppa | ia64)
+		echo "'$1' architecture is not supported"
+		echo 1
+		;;
+	*)
+		echo "Can't find '$1' architecture"
+		exit 1
+		;;
+	esac
+}
+
+while IFS= read -r arch
+do
+	echo "Preparing syscalls for ${arch} architecture..."
+	generate_syscalls "${arch}" 
+done <${SUPPORTED_ARCHS}