Hello,
Chris Wedgwood wrote:
On Mon, Apr 18, 2005 at 12:19:54PM +0900, Takashi Ikebe wrote:
This patch add function called "Live patching" which is defined on OSDL's carrier grade linux requiremnt definition to linux 2.6.11.7 kernel.I;m curious as to what people decided this was a necessary requirement.
The requirements are comes from Network Equipment Providers, Telecom Carriers, and Hardware Vendors,
You can see the attendee from below link;
http://groups.osdl.org/world_map/full_roster/
Why can't you use ptrace for all this?The live patching allows process to patch on-line (without restarting process) on i386 and x86_64 architectures, by overwriting jump assembly code on entry point of functions which you want to fix, to patched functions.
GDB based approach seems not fit to our requirements. GDB(ptrace) based functions are basically need to be done when target process is stopping.
In addition to that current PTRACE_PEEK/POKE* allows us to copy only a *word* size...
From our experience, sometimes patches became to dozens to hundreds at one patching, and in this case GDB based approach cause target process's availability descent.
-- Takashi Ikebe NTT Network Service Systems Laboratories 9-11, Midori-Cho 3-Chome Musashino-Shi, Tokyo 180-8585 Japan Tel : +81 422 59 4246, Fax : +81 422 60 4012 e-mail : [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
