Re: [Minios-devel] [UNIKRAFT PATCH 08/10] lib/vfscore: syscall writev

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

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

On 04.06.19 18:28, Yuri Volchkov wrote:
> First ever user of syscall shim layer
>
> Signed-off-by: Yuri Volchkov <yuri.volchkov@xxxxxxxxx>
> ---
>   lib/vfscore/Makefile.uk   | 4 +++-
>   lib/vfscore/exportsyms.uk | 1 +
>   lib/vfscore/main.c        | 7 +++++++
>   3 files changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/lib/vfscore/Makefile.uk b/lib/vfscore/Makefile.uk
> index 1fd35858..0166e612 100644
> --- a/lib/vfscore/Makefile.uk
> +++ b/lib/vfscore/Makefile.uk
> @@ -15,4 +15,6 @@ LIBVFSCORE_SRCS-y += $(LIBVFSCORE_BASE)/lookup.c
>   LIBVFSCORE_SRCS-y += $(LIBVFSCORE_BASE)/fops.c
>   LIBVFSCORE_SRCS-y += $(LIBVFSCORE_BASE)/subr_uio.c
>   
> -EXTRA_LD_SCRIPT-$(CONFIG_LIBVFSCORE) += $(LIBVFSCORE_BASE)/extra.ld
> \ No newline at end of file
> +EXTRA_LD_SCRIPT-$(CONFIG_LIBVFSCORE) += $(LIBVFSCORE_BASE)/extra.ld
> +
> +UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += writev-3
> diff --git a/lib/vfscore/exportsyms.uk b/lib/vfscore/exportsyms.uk
> index 34eeee59..da7fbaea 100644
> --- a/lib/vfscore/exportsyms.uk
> +++ b/lib/vfscore/exportsyms.uk
> @@ -74,3 +74,4 @@ faccessat
>   readlink
>   fallocate
>   lseek
> +uk_syscall_writev
> diff --git a/lib/vfscore/main.c b/lib/vfscore/main.c
> index dfd43eb3..fff233f3 100644
> --- a/lib/vfscore/main.c
> +++ b/lib/vfscore/main.c
> @@ -49,6 +49,7 @@
>   #include <uk/errptr.h>
>   #include <uk/ctors.h>
>   #include <uk/trace.h>
> +#include <uk/syscall.h>
>   
>   #ifdef DEBUG_VFS
>   int   vfs_debug = VFSDB_FLAGS;
> @@ -458,6 +459,12 @@ ssize_t writev(int fd, const struct iovec *iov, int iovcnt)
>         return pwritev(fd, iov, iovcnt, -1);
>   }
>   
> +UK_SYSCALL_DEFINE(writev, unsigned long, fd, const struct iovec *, vec,
> +                 unsigned long, vlen)
> +{
> +       return pwritev(fd, vec, vlen, -1);
> +}
> +
>   UK_TRACEPOINT(trace_vfs_ioctl, "%d 0x%x", int, unsigned long);
>   UK_TRACEPOINT(trace_vfs_ioctl_ret, "");
>   UK_TRACEPOINT(trace_vfs_ioctl_err, "%d", int);
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