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Date: Sat, 24 May 2008 22:44:37 -0700 (PDT) From: Alex Belits <abelits@...bos.illtel.denver.co.us> To: Bosko Radivojevic <bosko.radivojevic@...il.com> cc: lkml <linux-kernel@...r.kernel.org> Subject: Re: Inserting code from userspace to kernel space On Thu, 22 May 2008, Bosko Radivojevic wrote: > I'm looking for a way to insert code from user space to the kernel > space, but without using kernel module. Actually, we are working on a > system that has to allow end user to change part of code (one or two > functions) that is executed from the kernel space. > > For now we have two different kernel modules, one exporting a function > which another module uses. Process of compiling kernel module is quite > ineligible for standard end user (along with the requirement to > support multi platform cross compiling) compared to just cross > compiling a simple code that doesn't use any libraries than libc. Why? You don't have to recompile everything, just link a module before loaing it -- a part containing the function can be one object file, the rest of the module (a wrapper) is compiled once for a particular kernel version, and both are linked together, producing a module valid for a particular kenel version. This is how most of proprietary drivers are distributed, and Ubuntu has a whole infrastructure around that mechanism that simplifies transition between versions. -- Alex -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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