From: Behan Webster <beh...@converseincode.com>
Define a global named register for current_stack_pointer. The use of this new
variable guarantees that both gcc and clang can access this register in C code.
Signed-off-by: Behan Webster <beh...@converseincode.com>
Reviewed-by: Jan-Simon Möller <dl...@gmx.de>
Reviewed-by: Mark Charlebois <charl...@gmail.com>
---
arch/arm64/include/asm/thread_info.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm64/include/asm/thread_info.h
b/arch/arm64/include/asm/thread_info.h
index e40b6d0..e6b6094 100644
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -69,6 +69,11 @@ struct thread_info {
#define init_stack (init_thread_union.stack)
/*
+ * how to get the current stack pointer from C
+ */
+register unsigned long current_stack_pointer asm ("sp");
+
+/*
* how to get the thread information struct from C
*/
static inline struct thread_info *current_thread_info(void)
__attribute_const__;
--
1.9.1
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