From: Behan Webster <[email protected]> A macro to get the current stack pointer which allows for a single place in which to do so with ASM. Before this named registers (a gcc extension) was used to get the stack pointer. Using ASM is a more portable way of getting the stack pointer which works with both gcc and clang. This macro is of the same name used in the X86 arch.
Author: Behan Webster <[email protected]> Signed-off-by: Behan Webster <[email protected]> Reviewed-by: Jan-Simon Möller <[email protected]> --- arch/arm/include/asm/thread_info.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h index df5e13d..94283f8 100644 --- a/arch/arm/include/asm/thread_info.h +++ b/arch/arm/include/asm/thread_info.h @@ -100,6 +100,15 @@ struct thread_info { #define init_stack (init_thread_union.stack) /* + * how to get the current stack pointer from C + */ +#define current_stack_pointer ({ \ + unsigned long current_sp; \ + asm ("mov %0, r13" : "=r" (current_sp)); \ + current_sp; \ +}) + +/* * how to get the thread information struct from C */ static inline struct thread_info *current_thread_info(void) __attribute_const__; -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
