-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 2014 02 28 15:24, Denis 'GNUtoo' Carikli wrote: > On Sat, 22 Feb 2014 12:13:47 -0800 Blibbet <blib...@gmail.com> > wrote: > >>> This is kinda hard to say. I've heard that on x86, it is >>> possible that the BIOS keeps executing code even after it >>> started the system, so perhaps something like that can happen >>> too. >> >> UEFI remains running while the loaded OS runs. The OS (and apps) >> can communicate with EFI. >> >> EFI is a complex standalone realtime embedded event-driven OS, >> not just a simplistic firmware/loader. >> >> EFI has "Runtime Services" which can communicate with the OS >> (Linux, Windows, etc.). The main one is for accessing variables >> (like environment variables). Others OS vendors or OEMs or >> firmware vendors can add other runtime services. For example, I >> believe (unconfirmed) that Apple moved some of their OSX DRM code >> into an EFI runtime service. One thing I know about Mac OS's efi is that the efi is different to most of UEFI in x64 platform as it is a 32bit efi. Malware authors can write EFI runtime service drivers and -- >> if they can install them on your system -- you'll have a hard >> time determining it is there. > flashrom -p <some_external_programmer> -r efi.bin Then analyse > that, but I don't think it's worth the time. > When I was tring to add SLIC to UEFI, is there a way to add SLIC module permanently even you want to update UEFI later, I wonder how does it achieved.
thank you ayaka -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJTENn2AAoJEPb4VsMIzTzigYsH/10GbJ5to/ukxY3uTEusdzvk G/0JlMcAukmjQTp9iH/7poHaUBwezzJO8bzySPN6QRlLby5iX+yMhFk2BytRa5KY 3Ji5AW5VoOnRx3975FokjfQ35G2amMZIn2934+bS5PFET0p6/rDi3P7Q4uvGa07+ D3OjuFsxiphOQ5ywxMNxhWjV8GyyIqd8a6IQQBXqN9FG39udIAGtTIWheuXb9i8i 8tGN2dRGBJxSEqXf8J/kjvzYnpC1WjfUOFcjfcBrwxnT3GKgk9GY4I4vyMYxjwe3 63xbIaTv5+XAYFF0L4Nd/vdxp9TIMGISpHCSn6RjfQcgu2BysOwzV3LLO4f4xvw= =BUMy -----END PGP SIGNATURE----- _______________________________________________ Replicant mailing list Replicant@lists.osuosl.org http://lists.osuosl.org/mailman/listinfo/replicant
