Hi, On Sun, Jan 23, 2022 at 9:49 AM Mike Banon <mikeb...@gmail.com> wrote: > > Good day! The flashrom software has the "internal" mode - using which, > you may be able to access the BIOS chip directly from your OS, if your > hardware is supported. In example: > > sudo flashrom -p > internal:laptop=force_I_want_a_brick,amd_imc_force=yes -r > ./build/coreflop.rom
Mike, can you please explain why you've suggested using such a dangerous command without even knowing which system it's going to be run on? The `force_I_want_a_brick` name is intentional, as flashrom can cause problems on certain laptops (most laptops from the last decade should be fine, though), c.f. https://www.flashrom.org/Laptops for a detailed explanation. And you've suggested using `amd_imc_force` even though it only applies to AMD southbridges using SPI. I know you're just trying to help, but I'm afraid that suggesting people to run dangerous commands on unknown hardware without mentioning the risks is not helpful. > I think this mode is available only on Linux (may have to boot with > "iomem=relaxed" kernel flag) - however, you may boot a Linux LiveUSB > on your target PC to use Linux without the installation in a live > mode. On x86, the internal programmer should also work on most BSDs and Darwin (macOS). It might even work on Solaris. On Linux, the `iomem=relaxed` kernel parameter can be used when a kernel module conflicts with the resources flashrom wants to use, but it reduces the system's security. On Intel systems, unloading the `lpc_ich` kernel module should allow using flashrom's internal programmer without having to boot with `iomem=relaxed`. > As for "how do I remotely obtain a BIOS image from another computer > using flashrom" - if this internal mode is available to you, and a > target PC is running Linux, you can remotely connect to this PC using > a SSH (or VPN + SSH), run the flashrom command to read a BIOS image > from a chip, and then - using scp - copy the obtained BIOS image to > your own PC > > > On Fri, Jan 21, 2022 at 3:26 AM zy <2018111...@bupt.cn> wrote: > > > > Hi， > > I'm a student from China and I've been learning flashrom，So I would like > > to know whether the flashrom can support extracting BIOS firmware images > > under Windows 7/10. > > If I don't have the Internet（Just LAN），how do I remotely obtain a BIOS > > image from another computer use flashrom？ > > Maybe my English not very well. Thank you very much. On Windows, flashrom's internal programmer is unusable. It requires libpci and raw memory access; libpci is not available on Windows as far as I know, and I think Windows restricts raw memory access from userspace code for security reasons. One could try to implement the required functionality in a driver, but one would also need to convince Microsoft to sign the driver. It could be done, but it's not easy. No one is working on this, as far as I know. > > Looking forward to your reply. > > > > > > _______________________________________________ > > flashrom mailing list -- flashrom@flashrom.org > > To unsubscribe send an email to flashrom-le...@flashrom.org > > > > -- > Best regards, Mike Banon > Open Source Community Manager of 3mdeb - https://3mdeb.com/ > _______________________________________________ > flashrom mailing list -- flashrom@flashrom.org > To unsubscribe send an email to flashrom-le...@flashrom.org Best regards, Angel _______________________________________________ flashrom mailing list -- flashrom@flashrom.org To unsubscribe send an email to flashrom-le...@flashrom.org
