[lkml]   [2007]   [Mar]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH] Complain about missing system calls.
    On Fri, 2007-03-09 17:11:10 +0100, Andi Kleen <> wrote:
    > David Woodhouse <> writes:
    > > Most system calls seem to get added to i386 first. This patch
    > > automatically generates a warning for any new system call which is
    > > implemented on i386 but not the architecture currently being compiled.
    > > On PowerPC at the moment, for example, it results in these warnings:
    > > init/missing_syscalls.h:935:3: warning: #warning syscall sync_file_range not implemented
    > > init/missing_syscalls.h:947:3: warning: #warning syscall getcpu not implemented
    > > init/missing_syscalls.h:950:3: warning: #warning syscall epoll_pwait not implemented
    > I think a better solution would be to finally switch to auto generated
    > system call tables for newer system calls. The original reason why the
    > architectures have different system call numbers -- compatibility with
    > another "native" Unix -- is completely obsolete now. This leaves only
    > minor differences of compat stub vs non compat stub and a few
    > architecture specific calls.
    > Of course the existing syscall numbers can't be changed, but for all new
    > calls one could just add automatically for everybody.
    > A global table with two entries (compat and non compat) and a per arch
    > override table should be sufficient.

    Not everybody has a simple indexed list of pointers :) For example,
    for vax-linux, we use a struct per syscall with the expected number of
    on-stack longwords for the call.

    So if something "new" is coming up, please keep in mind that it should
    be flexible enough to represent that. :)

    MfG, JBG

    Jan-Benedict Glaw +49-172-7608481
    Signature of: "really soon now": an unspecified period of time, likly to
    the second : be greater than any reasonable definition
    of "soon".
    [unhandled content-type:application/pgp-signature]
     \ /
      Last update: 2007-03-09 17:41    [W:0.022 / U:3.548 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site