linux-user, scripts: add a script to update syscall.tbl

scripts/update-syscalltbl.sh has the list of syscall.tbl to update and
can copy them from the linux source directory

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200310103403.3284090-19-laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

MAINTAINERS

@@ -2448,6 +2448,7 @@ S: Maintained
 F: linux-user/
 F: default-configs/*-linux-user.mak
 F: scripts/qemu-binfmt-conf.sh
+F: scripts/update-syscalltbl.sh
 
 Tiny Code Generator (TCG)
 -------------------------

scripts/update-syscalltbl.sh

@@ -0,0 +1,49 @@
+TBL_LIST="\
+arch/alpha/kernel/syscalls/syscall.tbl,linux-user/alpha/syscall.tbl \
+arch/arm/tools/syscall.tbl,linux-user/arm/syscall.tbl \
+arch/m68k/kernel/syscalls/syscall.tbl,linux-user/m68k/syscall.tbl \
+arch/microblaze/kernel/syscalls/syscall.tbl,linux-user/microblaze/syscall.tbl \
+arch/mips/kernel/syscalls/syscall_n32.tbl,linux-user/mips64/syscall_n32.tbl \
+arch/mips/kernel/syscalls/syscall_n64.tbl,linux-user/mips64/syscall_n64.tbl \
+arch/mips/kernel/syscalls/syscall_o32.tbl,linux-user/mips/syscall_o32.tbl \
+arch/parisc/kernel/syscalls/syscall.tbl,linux-user/hppa/syscall.tbl \
+arch/powerpc/kernel/syscalls/syscall.tbl,linux-user/ppc/syscall.tbl \
+arch/s390/kernel/syscalls/syscall.tbl,linux-user/s390x/syscall.tbl \
+arch/sh/kernel/syscalls/syscall.tbl,linux-user/sh4/syscall.tbl \
+arch/sparc/kernel/syscalls/syscall.tbl,linux-user/sparc64/syscall.tbl \
+arch/sparc/kernel/syscalls/syscall.tbl,linux-user/sparc/syscall.tbl \
+arch/x86/entry/syscalls/syscall_32.tbl,linux-user/i386/syscall_32.tbl \
+arch/x86/entry/syscalls/syscall_64.tbl,linux-user/x86_64/syscall_64.tbl \
+arch/xtensa/kernel/syscalls/syscall.tbl,linux-user/xtensa/syscall.tbl\
+"
+
+linux="$1"
+output="$2"
+
+if [ -z "$linux" ] || ! [ -d "$linux" ]; then
+    cat << EOF
+usage: update-syscalltbl.sh LINUX_PATH [OUTPUT_PATH]
+
+LINUX_PATH      Linux kernel directory to obtain the syscall.tbl from
+OUTPUT_PATH     output directory, usually the qemu source tree (default: $PWD)
+EOF
+    exit 1
+fi
+
+if [ -z "$output" ]; then
+    output="$PWD"
+fi
+
+for entry in $TBL_LIST; do
+    OFS="$IFS"
+    IFS=,
+    set $entry
+    src=$1
+    dst=$2
+    IFS="$OFS"
+    if ! cp "$linux/$src" "$output/$dst" ; then
+        echo "Cannot copy $linux/$src to $output/$dst" 1>&2
+        exit 1
+    fi
+done
+