On Thu, 03 Sep 2009, Zhenwen Xu wrote: > On Tue, Sep 01, 2009 at 08:57:58PM +0300, Jonathan Nell wrote: > > I'm trying to wrap the > > SG_IO ioctl call (i.e. trap it in the kernel) and have that dump the > > data from (struct sg_io_hdr).dxferp. > > Having issues with doing the kernel trap in the newer kernel versions > > though (trying on 2.6.30). The syscall table is now read-only but for > > some reason my set_memory_rw() call is failing... Any ideas how to do > > this properly? > > > > Here are the relevant bits of code: > > try read this: > http://zhwen.org/xlog/2009/03/%e6%88%aa%e8%8e%b7linux%e7%b3%bb%e7%bb%9f%e8%b0%83%e7%94%a8.htm > > here is the demo. > http://zhwen.org/coding/cat_syscall.c while this is quit a nice hack I think that meanwhile standard methods like kprobes or utrace would do the trick without such intrusive code and allow very flexible analysis of what is going on. hofrat -- To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
