summaryrefslogtreecommitdiff
path: root/include/linux/scs.h
diff options
context:
space:
mode:
authorWill Deacon <will@kernel.org>2020-05-15 18:17:12 +0300
committerWill Deacon <will@kernel.org>2020-05-18 19:47:48 +0300
commit871e100e432c651c9c46fb9c3184b4577e0de3ae (patch)
tree95f57bcb3f5f40aac9f9075e51d5456b21e591f3 /include/linux/scs.h
parentaa7a65ae5b8f459617e5ed1422301386e7f12274 (diff)
downloadlinux-871e100e432c651c9c46fb9c3184b4577e0de3ae.tar.xz
scs: Move DEFINE_SCS macro into core code
Defining static shadow call stacks is not architecture-specific, so move the DEFINE_SCS() macro into the core header file. Tested-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'include/linux/scs.h')
-rw-r--r--include/linux/scs.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/scs.h b/include/linux/scs.h
index 2fd3df50e93e..6dec390cf154 100644
--- a/include/linux/scs.h
+++ b/include/linux/scs.h
@@ -26,6 +26,10 @@
/* An illegal pointer value to mark the end of the shadow stack. */
#define SCS_END_MAGIC (0x5f6UL + POISON_POINTER_DELTA)
+/* Allocate a static per-CPU shadow stack */
+#define DEFINE_SCS(name) \
+ DEFINE_PER_CPU(unsigned long [SCS_SIZE/sizeof(long)], name) \
+
#define task_scs(tsk) (task_thread_info(tsk)->scs_base)
#define task_scs_sp(tsk) (task_thread_info(tsk)->scs_sp)