• Firoz Khan's avatar
    powerpc: add system call table generation support · aff85039
    Firoz Khan authored
    The system call tables are in different format in all
    architecture and it will be difficult to manually add or
    modify the system calls in the respective 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 implementation across all architectures.
    
    The system call table generation script is added in
    syscalls directory which contain the script to generate
    both uapi header file and system call table files.
    The syscall.tbl file will be the 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 and syscalltbl.sh will generate uapi header-
    unistd_32/64.h and syscall_table_32/64/c32/spu.h files
    respectively. File syscall_table_32/64/c32/spu.h is incl-
    uded by syscall.S - the real system call table. Both *.sh
    files will parse the content syscall.tbl to generate the
    header and table files.
    
    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>
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    aff85039
syscall.tbl 17.9 KB