linux/arch/x86/realmode
H. Peter Anvin 968ff9ee56 x86, realmode: Remove indirect jumps in trampoline_32 and wakeup_asm
Remove indirect jumps in trampoline_32.S and the 32-bit part of
wakeup_asm.S.  There exist systems which are known to do weird
things if an SMI comes in right after a mode switch, and the
safest way to deal with it is to always follow with a simple
absolute far jump.  In the 64-bit code we then to a register
indirect near jump; follow that pattern for the 32-bit code.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/1336501366-28617-14-git-send-email-jarkko.sakkinen@intel.com
2012-05-08 11:48:03 -07:00
..
rm x86, realmode: Remove indirect jumps in trampoline_32 and wakeup_asm 2012-05-08 11:48:03 -07:00
Makefile x86, realmode: realmode.bin infrastructure 2012-05-08 11:41:48 -07:00
rmpiggy.S x86, realmode: realmode.bin infrastructure 2012-05-08 11:41:48 -07:00