lkml.org 
[lkml]   [2014]   [Sep]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v2 1/7] arm: LLVMLinux: Add global named register current_stack_pointer for ARM
    Date
    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 fc44d37..bb43515 100644
    --- a/arch/arm/include/asm/thread_info.h
    +++ b/arch/arm/include/asm/thread_info.h
    @@ -101,6 +101,11 @@ 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/

    \
     
     \ /
      Last update: 2014-09-06 02:41    [W:3.678 / U:0.104 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site