lkml.org 
[lkml]   [2018]   [Aug]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Subject[PATCH 0/4] System call table generation support
    Date
    The purpose of this patch series is:
    1. We can easily add/modify/delete system call by changing entry
    in syscall.tbl file. No need to manually edit many files.

    2. It is easy to unify the system call implementation across all
    the architectures.

    The system call tables are in different format in all architecture
    and it will be difficult to manually add or modify the system calls
    manually in the respective files. To make it easy by keeping a script
    and which'll generate the header file and syscall table file so this
    change will unify the implementation across all architectures.

    syscall.tbl contains the list of available system calls along with
    system call number and corresponding entry point. Add a new system
    call in this architecture 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.

    ARM, s390 and x86 architecuture does exist the similar support. I
    leverage their implementation to come up with a generic solution.

    I have done the same support for work for alpha, microblaze, ia64,
    mips, parisc, powerpc, sh, sparc, and xtensa. But I started sending
    the patch for one architecuture for review. Below mentioned git
    repository contains more details.
    Git repo:- https://github.com/frzkhn/system_call_table_generator/

    Finally, this is the ground work for solving the Y2038 issue. We
    need to add/change two dozen of system calls to solve Y2038 issue.
    So this patch series will help to easily modify from existing
    system call to Y2038 compatible system calls.

    I started working system call table generation on 4.17-rc1. I used
    marcin's script - https://github.com/hrw/syscalls-table to generate
    the syscall.tbl file. And this will be the input to the system call
    table generation script. But there are couple system call got add
    in the latest rc release. If run Marcin's script on latest release,
    it will generate a different syscall.tbl. But I still use the old
    file - syscall.tbl and once all review got over I'll update
    syscall.tbl alone w.r.to the tip of the kernel. The impact of this
    is, few of the system call won't work.

    Firoz Khan (4):
    m68k: Rename system call table file name
    m68k: Replace NR_syscalls macro from asm/unistd.h
    m68k: Added system call table generation support
    m68k: uapi header and system call table file generation

    arch/m68k/68000/entry.S | 4 +-
    arch/m68k/Makefile | 3 +
    arch/m68k/coldfire/entry.S | 2 +-
    arch/m68k/include/asm/Kbuild | 2 +
    arch/m68k/include/asm/unistd.h | 3 -
    arch/m68k/include/uapi/asm/Kbuild | 2 +
    arch/m68k/include/uapi/asm/unistd.h | 385 +-----------------------------
    arch/m68k/kernel/Makefile | 2 +-
    arch/m68k/kernel/entry.S | 4 +-
    arch/m68k/kernel/syscall_table.S | 14 ++
    arch/m68k/kernel/syscalls/Makefile | 37 +++
    arch/m68k/kernel/syscalls/syscall.tbl | 386 ++++++++++++++++++++++++++++++
    arch/m68k/kernel/syscalls/syscallhdr.sh | 33 +++
    arch/m68k/kernel/syscalls/syscalltbl.sh | 28 +++
    arch/m68k/kernel/syscalltable.S | 403 --------------------------------
    15 files changed, 512 insertions(+), 796 deletions(-)
    create mode 100644 arch/m68k/kernel/syscall_table.S
    create mode 100644 arch/m68k/kernel/syscalls/Makefile
    create mode 100644 arch/m68k/kernel/syscalls/syscall.tbl
    create mode 100644 arch/m68k/kernel/syscalls/syscallhdr.sh
    create mode 100644 arch/m68k/kernel/syscalls/syscalltbl.sh
    delete mode 100644 arch/m68k/kernel/syscalltable.S

    --
    1.9.1

    \
     
     \ /
      Last update: 2018-08-09 07:16    [W:4.570 / U:0.116 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site