diff options
| author | Behan Webster <behanw@converseincode.com> | 2014-08-27 05:29:29 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-01-22 21:44:40 +0000 |
| commit | 98f12c0a80ae19316c1b32f610d094aaae2c5fc0 (patch) | |
| tree | f85a543b2e67180db64cf8231e0a4544c449d7d3 | |
| parent | da81aae1834686f559d6e06060d8f3c3f7cdf508 (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>
(cherry picked from commit 3337a10e0d0cbc9225cefc23aa7a604b698367ed)
Signed-off-by: Mark Brown <broonie@kernel.org>
| -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 23a3c4791d86..5093806522e1 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__; |