[UNIKRAFT PATCH 4/8] lib/vfscore: Register `mkdir` to syscall_shim

[Constantin Raducanu <raducanu.costi@xxxxxxxxx>]

Registers `mkdir` system call to syscall_shim library.

Signed-off-by: Constantin Raducanu <raducanu.costi@xxxxxxxxx>
---
 lib/vfscore/Makefile.uk   |  3 ++-
 lib/vfscore/exportsyms.uk |  2 ++
 lib/vfscore/main.c        | 13 ++++++-------
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/lib/vfscore/Makefile.uk b/lib/vfscore/Makefile.uk
index 1fe5eb6..8f04e45 100644
--- a/lib/vfscore/Makefile.uk
+++ b/lib/vfscore/Makefile.uk
@@ -57,4 +57,5 @@ UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += lstat-2
 UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += flock-2
 UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += unlink-1
 UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += stat-2
-UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += open-3
\ No newline at end of file
+UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += open-3
+UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += mkdir-2
\ No newline at end of file
diff --git a/lib/vfscore/exportsyms.uk b/lib/vfscore/exportsyms.uk
index 7e2f7ea..307dd5f 100644
--- a/lib/vfscore/exportsyms.uk
+++ b/lib/vfscore/exportsyms.uk
@@ -26,6 +26,8 @@ read
 uk_syscall_e_read
 uk_syscall_r_read
 mkdir
+uk_syscall_e_mkdir
+uk_syscall_r_mkdir
 fsync
 uk_syscall_e_fsync
 uk_syscall_r_fsync
diff --git a/lib/vfscore/main.c b/lib/vfscore/main.c
index 1bbbbd4..e5b3a16 100644
--- a/lib/vfscore/main.c
+++ b/lib/vfscore/main.c
@@ -862,8 +862,7 @@ UK_TRACEPOINT(trace_vfs_mkdir, "\"%s\" 0%0o", const char*, 
mode_t);
 UK_TRACEPOINT(trace_vfs_mkdir_ret, "");
 UK_TRACEPOINT(trace_vfs_mkdir_err, "%d", int);
 
-int
-mkdir(const char *pathname, mode_t mode)
+UK_SYSCALL_R_DEFINE(int, mkdir, const char*, pathname, mode_t, mode)
 {
        struct task *t = main_task;
        char path[PATH_MAX];
@@ -873,17 +872,17 @@ mkdir(const char *pathname, mode_t mode)
 
        trace_vfs_mkdir(pathname, mode);
        if ((error = task_conv(t, pathname, VWRITE, path)) != 0)
-               goto out_errno;
+               goto out_error;
 
        error = sys_mkdir(path, mode);
        if (error)
-               goto out_errno;
+               goto out_error;
        trace_vfs_mkdir_ret();
        return 0;
-       out_errno:
+
+       out_error:
        trace_vfs_mkdir_err(error);
-       errno = error;
-       return -1;
+       return -error;
 }
 
 UK_TRACEPOINT(trace_vfs_rmdir, "\"%s\"", const char*);
-- 
2.17.1