[Minios-devel] [UNIKRAFT PATCH v2 7/9] lib/vfscore: syscall writev

[Yuri Volchkov <yuri.volchkov@xxxxxxxxx>]

First ever user of syscall shim layer

Signed-off-by: Yuri Volchkov <yuri.volchkov@xxxxxxxxx>
Reviewed-by: Simon Kuenzer <simon.kuenzer@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);
-- 
2.19.2


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