On 19/12/2015 09:14, Andre Heider wrote: > Hi again, > > On Fri, Dec 11, 2015 at 11:50 AM, John Crispin <blo...@openwrt.org> wrote: >> had a chat with hauke. the bdiff between the A and B FW is around 64K. >> the idea would be to patch dsl_control to have a mechanism similar to >> the dsl_notify script. dsl_control would call the script once before fw >> loading with the "prepare" parameter and once the FW is loaded it will >> call the script again with the "delete" parameter. >> >> the script will then make sure to copy/patch the fw to /tmp on prepare >> and remove it again on delete. this would allow storing both files in >> the lzma area of the flash and we could runtime patch the FW on demand. >> >> volunteers to welcome ;) > > I could look into that I guess.
cool > > Which would mean we need a host tool to create a binary patch and a > target tool to apply it. > Is such a tool already used anywhere in openwrt? > http://www.daemonology.net/bsdiff/ and its not used yet. packaging a new tool is trivial however. just have a look at tools/*/Makefile > But it'll mean that a patched fw in /tmp would use an additional ~1mb memory. dsl_control would call the script twice. once when it want the fw to be prepared and a second time when it is finished which will trigger the deletion of the fw from /tmp John > > Regards, > Andre > _______________________________________________ > openwrt-devel mailing list > openwrt-devel@lists.openwrt.org > https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel > _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
