user: implement mlibc as the libc, finally.

It's finally done..

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

user/include/mlibc/sysdeps/lemon/generic/signals.cpp

@@ -0,0 +1,38 @@
+#include <lemon/syscall.h>
+
+#include <sys/types.h>
+
+#include <mlibc/ansi-sysdeps.hpp>
+
+namespace mlibc{
+
+int sys_sigprocmask(int how, const sigset_t *__restrict set,
+	sigset_t *__restrict retrieve){
+    int ret = syscall(SYS_SIGPROCMASK, how, set, retrieve);
+    if(ret < 0){
+        return -ret;
+    }
+
+    return 0;
+}
+
+int sys_sigaction(int signal, const struct sigaction *__restrict action,
+	struct sigaction *__restrict oldAction) {
+    int ret = syscall(SYS_SIGNAL_ACTION, signal, action, oldAction);
+    if(ret < 0){
+        return -ret;
+    }
+
+    return 0;
+}
+
+int sys_kill(int pid, int signal){
+    int ret = syscall(SYS_KILL, pid, signal);
+    if(ret < 0){
+        return -ret;
+    }
+
+    return 0;
+}
+
+}