Commit 871e100e authored May 15, 2020 by Will Deacon

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>

parent aa7a65ae

arch/arm64/kernel/scs.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -8,10 +8,6 @@
		#include <linux/percpu.h>
		#include <linux/scs.h>

		/* Allocate a static per-CPU shadow stack */
		#define DEFINE_SCS(name) \
		DEFINE_PER_CPU(unsigned long [SCS_SIZE/sizeof(long)], name) \

		DEFINE_SCS(irq_shadow_call_stack);

		#ifdef CONFIG_ARM_SDE_INTERFACE

include/linux/scs.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -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)