Jeremy Fitzhardinge 577eebeae3 xen: make -fstack-protector work under Xen ... -fstack-protector uses a special per-cpu "stack canary" value. gcc generates special code in each function to test the canary to make sure that the function's stack hasn't been overrun. On x86-64, this is simply an offset of %gs, which is the usual per-cpu base segment register, so setting it up simply requires loading %gs's base as normal. On i386, the stack protector segment is %gs (rather than the usual kernel percpu %fs segment register). This requires setting up the full kernel GDT and then loading %gs accordingly. We also need to make sure %gs is initialized when bringing up secondary cpus too. To keep things consistent, we do the full GDT/segment register setup on both architectures. Because we need to avoid -fstack-protected code before setting up the GDT and because there's no way to disable it on a per-function basis, several files need to have stack-protector inhibited. [ Impact: allow Xen booting with stack-protector enabled ] Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>		2009-09-09 16:37:39 -07:00
..
xenbus
xenfs
balloon.c
cpu_hotplug.c
events.c	xen: Use kcalloc() in xen_init_IRQ()	2009-07-01 11:19:47 +02:00
evtchn.c
features.c
grant-table.c
Kconfig
Makefile	xen: make -fstack-protector work under Xen	2009-09-09 16:37:39 -07:00
manage.c	PM core: rename suspend and resume functions	2009-06-12 21:32:31 +02:00
sys-hypervisor.c
xencomm.c