diff options
| author | Behan Webster <behanw@converseincode.com> | 2014-08-27 05:29:29 +0100 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2017-05-24 00:03:14 +0200 |
| commit | e9e57daf64332fc96e8a158d1473e21580fc0e72 (patch) | |
| tree | 835b6d7c21bd71e5af3319cd05a33ebbb363b6b3 /arch/arm64 | |
| parent | 5244e3e6f2baa04510a14c3fe42378fd604f17c6 (diff) | |
UPSTREAM: 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)
Bug: 29520177
Signed-off-by: Mohan Srinivasan <srmohan@google.com>
Change-Id: I19acaf0740ed061d47e4d4c6547142d45aaf81d4
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 ae1a5106f..ffbb019a9 100644 --- a/arch/arm64/include/asm/thread_info.h +++ b/arch/arm64/include/asm/thread_info.h @@ -72,6 +72,11 @@ 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__; |