user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/options/linux/generic/sys-uio.cpp

@@ -0,0 +1,33 @@
+#include <errno.h>
+#include <sys/uio.h>
+
+#include <bits/ensure.h>
+#include <mlibc/linux-sysdeps.hpp>
+
+ssize_t process_vm_readv(pid_t pid,
+    const struct iovec *local_iov, unsigned long liovcnt,
+    const struct iovec *remote_iov, unsigned long riovcnt,
+    unsigned long flags) {
+    MLIBC_CHECK_OR_ENOSYS(mlibc::sys_process_vm_readv, -1);
+    ssize_t bytes_read;
+    if(int e = mlibc::sys_process_vm_readv(pid, local_iov, liovcnt,
+            remote_iov, riovcnt, flags, &bytes_read); e) {
+        errno = e;
+        return -1;
+    }
+    return bytes_read;
+}
+
+ssize_t process_vm_writev(pid_t pid,
+    const struct iovec *local_iov, unsigned long liovcnt,
+    const struct iovec *remote_iov, unsigned long riovcnt,
+    unsigned long flags) {
+    MLIBC_CHECK_OR_ENOSYS(mlibc::sys_process_vm_writev, -1);
+    ssize_t bytes_written;
+    if(int e = mlibc::sys_process_vm_writev(pid, local_iov, liovcnt,
+            remote_iov, riovcnt, flags, &bytes_written); e) {
+        errno = e;
+        return -1;
+    }
+    return bytes_written;
+}