diff options
| author | Behan Webster | 2014-08-27 05:29:29 +0100 |
|---|---|---|
| committer | Will Deacon | 2014-09-08 14:39:19 +0100 |
| commit | 3337a10e0d0cbc9225cefc23aa7a604b698367ed (patch) | |
| tree | ef964ab4ac4964539f16384ef362f6d1aa5d0bee /arch/arm64 | |
| parent | 11d91a770f1fff44dafdf88d6089a3451f99c9b6 (diff) | |
arm64: LLVMLinux: Add current_stack_pointer() for arm64
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>
Reviewed-by: Olof Johansson <olof@lixom.net>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/thread_info.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h index 45108d802f5e..356e03774df4 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__; |