Long kernel thread here about the problem, which is a failure to link _mmx_memcpy when building eboot.o Solution 1: https://lkml.org/lkml/2012/3/22/105 User Report: http://lkml.indiana.edu/hypermail/linux/kernel/1203.3/01057.html Solution 2 pursuant to User Report: http://lkml.indiana.edu/hypermail/linux/kernel/1203.3/01718.html Solution 2 is close but leaves out other 3DNow processors like Cyrix III and Geode. I solved this problem with the following patch instead: --- arch/x86/Kconfig 2012-11-05 02:57:06.000000000 -0600 +++ ../../linux-3.6.6/arch/x86/Kconfig 2012-11-11 17:57:42.989147848 -0600 @@ -1503,7 +1503,7 @@ config EFI_STUB bool "EFI stub support" - depends on EFI + depends on EFI && !X86_USE_3DNOW ---help--- This kernel feature allows a bzImage to be loaded directly by EFI firmware without the use of a bootloader.
This has been fixed in a different way, http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=0f905a43ce955b638139bd84486194770a6a2c08 since there is no reason to prohibit building a kernel with 3DNow support and the EFI boot stub.