Re: [PATCH 1/4] scripts: add a script to generate syscall_nr.h

[Alistair Francis]

On Tue, Mar 10, 2020 at 4:08 AM Laurent Vivier <address@hidden> wrote:
>
> This script is needed for targets based on asm-generic syscall numbers 
> generation
>
> Signed-off-by: Laurent Vivier <address@hidden>

Reviewed-by: Alistair Francis <address@hidden>

Alistair

> ---
>  scripts/gensyscalls.sh | 94 ++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 94 insertions(+)
>  create mode 100755 scripts/gensyscalls.sh
>
> diff --git a/scripts/gensyscalls.sh b/scripts/gensyscalls.sh
> new file mode 100755
> index 000000000000..3b549a665d0f
> --- /dev/null
> +++ b/scripts/gensyscalls.sh
> @@ -0,0 +1,94 @@
> +#!/bin/sh
> +
> +linux="$1"
> +output="$2"
> +
> +TMP=$(mktemp -d)
> +
> +if [ "$linux" = "" ] ; then
> +    echo "Needs path to linux source tree" 1>&2
> +    exit 1
> +fi
> +
> +if [ "$output" = "" ] ; then
> +    output="$PWD"
> +fi
> +
> +upper()
> +{
> +    echo "$1" | tr "[:lower:]" "[:upper:]" | tr "[:punct:]" "_"
> +}
> +
> +qemu_arch()
> +{
> +    case "$1" in
> +    arm64)
> +        echo "aarch64"
> +        ;;
> +    *)
> +        upper "$1"
> +        ;;
> +    esac
> +}
> +
> +read_includes()
> +{
> +    arch=$1
> +    bits=$2
> +
> +     cpp -P -nostdinc -fdirectives-only \
> +        -D_UAPI_ASM_$(upper ${arch})_BITSPERLONG_H \
> +        -D__BITS_PER_LONG=${bits} \
> +        -I${linux}/arch/${arch}/include/uapi/ \
> +        -I${linux}/include/uapi \
> +        -I${TMP} \
> +        "${linux}/arch/${arch}/include/uapi/asm/unistd.h"
> +}
> +
> +filter_defines()
> +{
> +    grep -e "#define __NR_" -e "#define __NR3264"
> +}
> +
> +rename_defines()
> +{
> +    sed "s/ __NR_/ TARGET_NR_/g;s/(__NR_/(TARGET_NR_/g"
> +}
> +
> +evaluate_values()
> +{
> +    sed "s/#define TARGET_NR_/QEMU TARGET_NR_/" | \
> +    cpp -P -nostdinc | \
> +    sed "s/^QEMU /#define /"
> +}
> +
> +generate_syscall_nr()
> +{
> +    arch=$1
> +    bits=$2
> +    file="$3"
> +    guard="$(upper LINUX_USER_$(qemu_arch $arch)_$(basename "$file"))"
> +
> +    (echo "/*"
> +    echo " * This file contains the system call numbers."
> +    echo " */"
> +    echo "#ifndef ${guard}"
> +    echo "#define ${guard}"
> +    echo
> +    read_includes $arch $bits | filter_defines | rename_defines | \
> +                                evaluate_values | sort -n -k 3
> +    echo
> +    echo "#endif /* ${guard} */"
> +    echo) > "$file"
> +}
> +
> +mkdir "$TMP/asm"
> +> "$TMP/asm/bitsperlong.h"
> +
> +generate_syscall_nr arm64 64 "$output/linux-user/aarch64/syscall_nr.h"
> +generate_syscall_nr nios2 32 "$output/linux-user/nios2/syscall_nr.h"
> +generate_syscall_nr openrisc 32 "$output/linux-user/openrisc/syscall_nr.h"
> +
> +generate_syscall_nr riscv 32 "$output/linux-user/riscv/syscall32_nr.h"
> +generate_syscall_nr riscv 64 "$output/linux-user/riscv/syscall64_nr.h"
> +rm -fr "$TMP"
> --
> 2.24.1
>
>