Messages in this thread Patch in this message | | | From | behanw@converse ... | Subject | [PATCH 1/6] arm: LLVMLinux: Add global named register current_stack_pointer for ARM | Date | Tue, 8 Jul 2014 13:16:11 -0700 |
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From: Behan Webster <behanw@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 <behanw@converseincode.com> Reviewed-by: Jan-Simon Möller <dl9pf@gmx.de> Reviewed-by: Mark Charlebois <charlebm@gmail.com> --- arch/arm/include/asm/thread_info.h | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h index e4e4208..9cb9c66 100644 --- a/arch/arm/include/asm/thread_info.h +++ b/arch/arm/include/asm/thread_info.h @@ -100,6 +100,11 @@ struct thread_info { #define init_stack (init_thread_union.stack) /* + * how to get the current stack pointer in 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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