• Firoz Khan's avatar
    mips: add system call table generation support · 9bcbf97c
    Firoz Khan authored
    The system call tables are in different format in all
    architecture and it will be difficult to manually add,
    modify or delete the syscall table entries in the res-
    pective files. To make it easy by keeping a script and
    which will generate the uapi header and syscall table
    file. This change will also help to unify the implemen-
    tation across all architectures.
    
    The system call table generation script is added in
    kernel/syscalls directory which contain the scripts to
    generate both uapi header file and system call table
    files. The syscall.tbl will be input for the scripts.
    
    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.
    	- Compat entry name, if required.
    
    syscallhdr.sh, syscallnr.sh and syscalltbl.sh will gene-
    rate uapi header unistd_n64/n32/o32.h, unistd_nr_n64/n32/-
    o32.h and syscall_table_32_o32/64_n64/64-n32/64-o32.h files
    respectively. All *.sh files will parse the content sys-
    call.tbl to generate the header and table files. unistd-
    _n64/n32/o32.h and unistd_nr_n64/n32/o32.h will be included
    by uapi/asm/unistd.h and syscall_table_32_o32/64_n64/64-n32-
    /64-o32.h is included by kernel/syscall_table32_o32/64-
    _n64/64-n32/64-o32.S - the real system call table.
    
    ARM, s390 and x86 architecuture does have similar support.
    I leverage their implementation to come up with a generic
    solution.
    Signed-off-by: default avatarFiroz Khan <firoz.khan@linaro.org>
    [paul.burton@mips.com:
     - Change sysnr_pfx_unistd_nr_n64 to 64.]
    Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
    Cc: linux-mips@vger.kernel.org
    Cc: Ralf Baechle <ralf@linux-mips.org>
    Cc: James Hogan <jhogan@kernel.org>
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Cc: Philippe Ombredanne <pombredanne@nexb.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Kate Stewart <kstewart@linuxfoundation.org>
    Cc: y2038@lists.linaro.org
    Cc: linux-kernel@vger.kernel.org
    Cc: linux-arch@vger.kernel.org
    Cc: arnd@arndb.de
    Cc: deepa.kernel@gmail.com
    Cc: marcin.juszkiewicz@linaro.org
    9bcbf97c
syscallhdr.sh 896 Bytes