On Mon, Feb 24, 2003 at 03:05:14PM +0100, fcorneli@elis.rug.ac.be wrote:
> Hi,
>
> I ported some generic SunOS ptrace requests from my 2.4 exptrace kernel
> patch to the 2.5 tree. The PTRACE_READDATA/WRITEDATA requests have been
> available for a long time for the sparc architecture but I think they're
> also very useful on the i386 arch since PTRACE_PEEKDATA/POKEDATA are way
> too slow when handling large data blocks.
FYI Frank, three things. First of all, I really don't like the
interface of adding a second address to ptrace; I believe it interferes
with PIC on x86, since IIRC the extra argument would go in %ebx. The
BSDs have a nice interface involving passing a request structure.
Secondly, the implementation should be in kernel/ptrace.c not under
i386, we're trying to stop doing that.
Thirdly, I was going to do this, but I ended up making GDB use pread64
on /dev/mem instead. It works with no kernel modifications, and is
just as fast.
-- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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