Re: [Minios-devel] [UNIKRAFT PATCHv6 35/37] arch/arm64: Add function for stack pointer retrieval

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

Reviewed-by: Simon Kuenzer <simon.kuenzer@xxxxxxxxx>

On 14.09.2018 09:57, Wei Chen wrote:
> The ukdebug will print bottom address of stack in
> debug messages. So we just implement this function
> for Arm64 to retrieve stack pointer.
>
> Signed-off-by: Wei Chen <wei.chen@xxxxxxx>
> ---
>   include/uk/arch/arm/arm64/lcpu.h | 9 +++++++++
>   1 file changed, 9 insertions(+)
>
> diff --git a/include/uk/arch/arm/arm64/lcpu.h b/include/uk/arch/arm/arm64/lcpu.h
> index 3e1fd9b..2719313 100644
> --- a/include/uk/arch/arm/arm64/lcpu.h
> +++ b/include/uk/arch/arm/arm64/lcpu.h
> @@ -100,4 +100,13 @@ struct __regs {
>   #define wmb()   dsb(st) /* Full system memory barrier store */
>   #endif
>   
> +static inline unsigned long ukarch_read_sp(void)
> +{
> +       unsigned long sp;
> +
> +       __asm__ __volatile("mov %0, sp": "=&r"(sp));
> +
> +       return sp;
> +}
> +
>   #endif /* __ASSEMBLY__ */
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