Re: [PATCH v5 04/25] c6x: define syscall_get_arch()

[Mark Salter]

On Mon, 2018-12-10 at 07:29 +0300, Dmitry V. Levin wrote:
> syscall_get_arch() is required to be implemented on all architectures
> in addition to already implemented syscall_get_nr(),
> syscall_get_arguments(), syscall_get_error(), and
> syscall_get_return_value() functions in order to extend the generic
> ptrace API with PTRACE_GET_SYSCALL_INFO request.
> 
> Cc: Mark Salter <msalter@xxxxxxxxxx>
> Cc: Aurelien Jacquiot <jacquiot.aurelien@xxxxxxxxx>
> Cc: Paul Moore <paul@xxxxxxxxxxxxxx>
> Cc: Eric Paris <eparis@xxxxxxxxxx>
> Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
> Cc: Andy Lutomirski <luto@xxxxxxxxxx>
> Cc: Elvira Khabirova <lineprinter@xxxxxxxxxxxx>
> Cc: Eugene Syromyatnikov <esyr@xxxxxxxxxx>
> Cc: linux-c6x-dev@xxxxxxxxxxxxx
> Cc: linux-audit@xxxxxxxxxx
> Signed-off-by: Dmitry V. Levin <ldv@xxxxxxxxxxxx>
> ---
> 
> Notes:
>     v5: added Cc
> 
>  arch/c6x/include/asm/syscall.h | 7 +++++++
>  include/uapi/linux/audit.h     | 2 ++
>  2 files changed, 9 insertions(+)
> 
> diff --git a/arch/c6x/include/asm/syscall.h b/arch/c6x/include/asm/syscall.h
> index ae2be315ee9c..39dbd1ef994c 100644
> --- a/arch/c6x/include/asm/syscall.h
> +++ b/arch/c6x/include/asm/syscall.h
> @@ -11,6 +11,7 @@
>  #ifndef __ASM_C6X_SYSCALL_H
>  #define __ASM_C6X_SYSCALL_H
>  
> +#include <uapi/linux/audit.h>
>  #include <linux/err.h>
>  #include <linux/sched.h>
>  
> @@ -120,4 +121,10 @@ static inline void syscall_set_arguments(struct task_struct *task,
>  	}
>  }
>  
> +static inline int syscall_get_arch(void)
> +{
> +	return IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
> +		? AUDIT_ARCH_C6XBE : AUDIT_ARCH_C6X;
> +}
> +
>  #endif /* __ASM_C6X_SYSCALLS_H */
> diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
> index bedf3bf54c3a..72aeea0a740d 100644
> --- a/include/uapi/linux/audit.h
> +++ b/include/uapi/linux/audit.h
> @@ -381,6 +381,8 @@ enum {
>  #define AUDIT_ARCH_ARCV2BE	(EM_ARCV2)
>  #define AUDIT_ARCH_ARM		(EM_ARM|__AUDIT_ARCH_LE)
>  #define AUDIT_ARCH_ARMEB	(EM_ARM)
> +#define AUDIT_ARCH_C6X		(EM_TI_C6000|__AUDIT_ARCH_LE)
> +#define AUDIT_ARCH_C6XBE	(EM_TI_C6000)
>  #define AUDIT_ARCH_CRIS		(EM_CRIS|__AUDIT_ARCH_LE)
>  #define AUDIT_ARCH_FRV		(EM_FRV)
>  #define AUDIT_ARCH_I386		(EM_386|__AUDIT_ARCH_LE)

Acked-by: Mark Salter <msalter@xxxxxxxxxx>