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From:   Firoz Khan <firoz.khan@linaro.org>
Date:   Mon, 10 Dec 2018 11:05:38 +0530
Message-ID: <CALxhOninHsCiB7puVOkU3i6W9gfhGqAA6EDT0kAEC9ZqMZPh7w@mail.gmail.com>
Subject: Re: [PATCH v4 0/7] mips: system call table generation support
To:     linux-mips@vger.kernel.org, Ralf Baechle <ralf@linux-mips.org>,
        Paul Burton <paul.burton@mips.com>,
        James Hogan <jhogan@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Philippe Ombredanne <pombredanne@nexb.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Kate Stewart <kstewart@linuxfoundation.org>
Cc:     y2038 Mailman List <y2038@lists.linaro.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux-Arch <linux-arch@vger.kernel.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Deepa Dinamani <deepa.kernel@gmail.com>,
        Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
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Hi Paul,

On Thu, 6 Dec 2018 at 10:49, Firoz Khan <firoz.khan@linaro.org> wrote:
>
> The purpose of this patch series is, we can easily
> add/modify/delete system call table support by cha-
> nging entry in syscall.tbl file instead of manually
> changing many files. The other goal is to unify the
> system call table generation support implementation
> across all the architectures.
>
> The system call tables are in different format in
> all architecture. It will be difficult to manually
> add, modify or delete the system calls in the resp-
> ective files manually. To make it easy by keeping a
> script and which'll generate uapi header file and
> syscall table file.
>
> syscall.tbl contains the list of available system
> calls along with system call number and correspond-
> ing entry point. Add a new system call in this arch-
> itecture will be possible by adding new entry in
> the syscall.tbl file.
>
> Adding a new table entry consisting of:
>         - System call number.
>         - ABI.
>         - System call name.
>         - Entry point name.
>         - Compat entry name, if required.
>
> ARM, s390 and x86 architecuture does exist the sim-
> ilar support. I leverage their implementation to
> come up with a generic solution.
>
> I have done the same support for work for alpha,
> ia64, m68k, microblaze, parisc, powerpc, sh, sparc,
> and xtensa. Below mentioned git repository contains
> more details about the workflow.
>
> https://github.com/frzkhn/system_call_table_generator/
>
> Finally, this is the ground work to solve the Y2038
> issue. We need to add two dozen of system calls to
> solve Y2038 issue. So this patch series will help to
> add new system calls easily by adding new entry in
> the syscall.tbl.
>
> Changes since v3:
>  - rearranged the patches for '64' to 'n64' conver-
>    sion.
>  - moved the unistd_nr_*.h files to asm/unistd.h
>  - modified the *.sh files.

Please review this patch series and queue it for linux-next.

Thanks
Firoz

>
> Changes since v2:
>  - fixed __NR_syscalls assign issue.
>
> Changes since v1:
>  - optimized/updated the syscall table generation
>    scripts.
>  - fixed all mixed indentation issues in syscall.tbl.
>  - added "comments" in syscall_*.tbl.
>  - changed from generic-y to generated-y in Kbuild.
>
> Firoz Khan (7):
>   mips: add __NR_syscalls along with __NR_Linux_syscalls
>   mips: remove unused macros
>   mips: rename macros and files from '64' to 'n64'
>   mips: add +1 to __NR_syscalls in uapi header
>   mips: remove syscall table entries
>   mips: add system call table generation support
>   mips: generate uapi header and system call table files
>
>  arch/mips/Makefile                        |    3 +
>  arch/mips/include/asm/Kbuild              |    4 +
>  arch/mips/include/asm/asm.h               |    6 +-
>  arch/mips/include/asm/fpregdef.h          |    4 +-
>  arch/mips/include/asm/fw/arc/hinv.h       |    2 +-
>  arch/mips/include/asm/regdef.h            |    4 +-
>  arch/mips/include/asm/sigcontext.h        |    4 +-
>  arch/mips/include/asm/unistd.h            |   11 +-
>  arch/mips/include/uapi/asm/Kbuild         |    6 +
>  arch/mips/include/uapi/asm/fcntl.h        |    2 +-
>  arch/mips/include/uapi/asm/reg.h          |    4 +-
>  arch/mips/include/uapi/asm/sgidefs.h      |    2 +-
>  arch/mips/include/uapi/asm/sigcontext.h   |    4 +-
>  arch/mips/include/uapi/asm/stat.h         |    4 +-
>  arch/mips/include/uapi/asm/statfs.h       |    4 +-
>  arch/mips/include/uapi/asm/unistd.h       | 1069 +----------------------------
>  arch/mips/kernel/Makefile                 |    2 +-
>  arch/mips/kernel/ftrace.c                 |    8 +-
>  arch/mips/kernel/scall32-o32.S            |  391 +----------
>  arch/mips/kernel/scall64-64.S             |  444 ------------
>  arch/mips/kernel/scall64-n32.S            |  341 +--------
>  arch/mips/kernel/scall64-n64.S            |  117 ++++
>  arch/mips/kernel/scall64-o32.S            |  379 +---------
>  arch/mips/kernel/syscalls/Makefile        |   96 +++
>  arch/mips/kernel/syscalls/syscall_n32.tbl |  343 +++++++++
>  arch/mips/kernel/syscalls/syscall_n64.tbl |  339 +++++++++
>  arch/mips/kernel/syscalls/syscall_o32.tbl |  382 +++++++++++
>  arch/mips/kernel/syscalls/syscallhdr.sh   |   37 +
>  arch/mips/kernel/syscalls/syscallnr.sh    |   28 +
>  arch/mips/kernel/syscalls/syscalltbl.sh   |   36 +
>  arch/mips/kvm/entry.c                     |    4 +-
>  arch/mips/vdso/vdso.h                     |    2 +-
>  arch/mips/vdso/vdso.lds.S                 |    2 +-
>  33 files changed, 1450 insertions(+), 2634 deletions(-)
>  delete mode 100644 arch/mips/kernel/scall64-64.S
>  create mode 100644 arch/mips/kernel/scall64-n64.S
>  create mode 100644 arch/mips/kernel/syscalls/Makefile
>  create mode 100644 arch/mips/kernel/syscalls/syscall_n32.tbl
>  create mode 100644 arch/mips/kernel/syscalls/syscall_n64.tbl
>  create mode 100644 arch/mips/kernel/syscalls/syscall_o32.tbl
>  create mode 100644 arch/mips/kernel/syscalls/syscallhdr.sh
>  create mode 100644 arch/mips/kernel/syscalls/syscallnr.sh
>  create mode 100644 arch/mips/kernel/syscalls/syscalltbl.sh
>
> --
> 1.9.1
>