Date: Tue, 27 Jul 2010 15:38:45 +0300 From: EforeZZ <eforezz@gmail.com> To: freebsd-questions <freebsd-questions@freebsd.org> Subject: Firewire RAM access Message-ID: <AANLkTikv%2BPA3J-gYjHULghW8BskswYjjRBwpripQB5Zw@mail.gmail.com>
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Hi, I was playing around with fwcontrol and its "-m" switch. I connected my FreeBSD 7.2 notebook to Win7 PC Via firewire and attempted to access Win7's RAM through the /dev/fwmem interface. I failed. ================================================================ 5 root@purevil:ttyv0 ~ 15:11:24 > fwcontrol 2 devices (info_len=2) node EUI64 status hostname 0 00-1d-72-ff-ff-c5-6b-71 0 -1 00-1e-8c-00-01-7b-f5-38 0 ================================================================ Then I plugged in the cable: ================================================================ fwohci0: BUS reset fwohci0: node_id=0xc000ffc1, gen=8, CYCLEMASTER mode firewire0: 2 nodes, maxhop <= 1, cable IRM = 1 (me) firewire0: bus manager 1 (me) 5 root@purevil:ttyv0 ~ 15:11:46 > fwcontrol 2 devices (info_len=2) node EUI64 status hostname 1 00-1d-72-ff-ff-c5-6b-71 0 0 00-1e-8c-00-01-7b-f5-38 1 5 root@purevil:ttyv0 ~ 15:11:49 > fwcontrol -m 00-1e-8c-00-01-7b-f5-38 0 root@purevil:ttyv0 ~ 15:12:00 > ll /dev/fwmem* lrwxr-xr-x 1 root wheel 8 27 Jul 14:56 /dev/fwmem0 -> fwmem0.0 crw-rw---- 1 root operator 0, 53 27 Jul 14:56 /dev/fwmem0.0 0 root@purevil:ttyv0 ~ 15:12:04 > more /dev/fwmem0 read error (press RETURN) ================================================================ The question is.. Should this always work? As far as I know I should be able to access other PC's RAM through the firewire connection without any support from the connected PC's OS, right? Best regards, EforeZZ
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