On Sat, Mar 02, 2019 at 03:36:51PM +0100, Oleksij Rempel wrote: > Hi, > > Am 02.03.19 um 13:49 schrieb Patrick Schneider: > > Hey guys, > > I have a question about a way of "emergency flashing" the device. > > So I have a fully operational linux system with barebox as bootloader. In production environment I have no access to the serial console but I have a USB OTG port. > > For security reasons I don't want USB active in my "normal" barebox environment, so it's off by config. > > For support, to gain access to a barebox and bootloader functionality is there a way to load another barebox (with usb active) from linux userspace into RAM and start/reboot into that? > > Have a nice weekend! > > Let me rephrase: you disabled every thing in a bootloader which can be > accessed only locally and provided functional to nuke complete system > from linux which can be accessed locally and remotely? > I assume, it would make sense to review the thread model of this project. > > Any way. "is it possible to run barebox from linux", the answer would > be: theoretically it should be possible to do it from kexec. I never > tried it before. I tried it on ARM and it used to work. Of course you need a barebox that doesn't try to bringup the SDRAM you are currently running at, but most code in barebox tests the PC being outside SDRAM before setting it up. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
