[PATCH v3 04/19] RISC-V: Add support for 32-bit vDSO calls

[Maciej W. Rozycki]

On Sun, 12 Jul 2020, Alistair Francis via Libc-alpha wrote:

> diff --git a/sysdeps/unix/sysv/linux/riscv/sysdep.h b/sysdeps/unix/sysv/linux/riscv/sysdep.h
> index 62a9551f50..bf26379479 100644
> --- a/sysdeps/unix/sysv/linux/riscv/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/riscv/sysdep.h
> @@ -136,14 +136,25 @@
>  
>  #else
>  
> -# define VDSO_NAME  "LINUX_4.15"
> -# define VDSO_HASH  182943605
> -
> -/* List of system calls which are supported as vsyscalls.  */
> -# define HAVE_CLOCK_GETRES64_VSYSCALL	"__vdso_clock_getres"
> -# define HAVE_CLOCK_GETTIME64_VSYSCALL	"__vdso_clock_gettime"
> -# define HAVE_GETTIMEOFDAY_VSYSCALL	"__vdso_gettimeofday"
> -# define HAVE_GETCPU_VSYSCALL		"__vdso_getcpu"
> +# if __WORDSIZE == 64
> +#  define VDSO_NAME  "LINUX_4.15"
> +#  define VDSO_HASH  182943605
> +
> +/* List of system calls which are supported as vsyscalls only
> +   for RV64.  */
> +#  define HAVE_CLOCK_GETRES64_VSYSCALL   "__vdso_clock_getres"
> +#  define HAVE_CLOCK_GETTIME64_VSYSCALL  "__vdso_clock_gettime"
> +#  define HAVE_GETTIMEOFDAY_VSYSCALL     "__vdso_gettimeofday"
> +# else
> +#  define VDSO_NAME  "LINUX_5.4"
> +#  define VDSO_HASH  61765876
> +
> +/* RV32 does not support the gettime VDSO syscalls.  */
> +# endif
> +
> +/* List of system calls which are supported as vsyscalls (for RV32 and
> +   RV64).  */
> +#  define HAVE_GETCPU_VSYSCALL           "__vdso_getcpu"
    ^^
 Extraneous space here.

 Please use tabs rather than spaces between the LHS and the RHS 
throughout.  Otherwise OK.  Thanks for adding the comments.

  Maciej