forked from luck/tmp_suning_uos_patched
26374c7b7d
In long mode the %cs is largely a relic. However there are a few cases like iret where it matters that we have a valid value. Without this patch it is possible to enter the kernel in startup_64 without setting %cs to a valid value. With this patch we don't care what %cs value we enter the kernel with, so long as the cs shadow register indicates it is a privileged code segment. Thanks to Magnus Damm for finding this problem and posting the first workable patch. I have moved the jump to set %cs down a few instructions so we don't need to take an extra jump. Which keeps the code simpler. Signed-of-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andi Kleen <ak@suse.de> |
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boot | ||
crypto | ||
ia32 | ||
kernel | ||
lib | ||
mm | ||
oprofile | ||
pci | ||
defconfig | ||
Kconfig | ||
Kconfig.debug | ||
Makefile |