Add syscalls test

Tests/TestSyscalls.c

@@ -0,0 +1,47 @@
+/*
+   This file is part of Fennix Kernel.
+
+   Fennix Kernel is free software: you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of
+   the License, or (at your option) any later version.
+
+   Fennix Kernel is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include <types.h>
+
+#include "../syscalls.h"
+
+#ifdef DEBUG
+
+__aligned(0x1000) __no_stack_protector void TestSyscalls()
+{
+   __asm__ __volatile__("syscall"
+                        :
+                        : "a"(_Print), "D"('H'), "S"(0)
+                        : "rcx", "r11", "memory");
+
+   int fork_id = -0xda;
+
+   __asm__ __volatile__("syscall"
+                        : "=a"(fork_id)
+                        : "a"(_Fork)
+                        : "rcx", "r11", "memory");
+
+   __asm__ __volatile__("syscall"
+                        :
+                        : "a"(_Exit), "D"(fork_id)
+                        : "rcx", "r11", "memory");
+
+   while (1)
+      ;
+}
+
+#endif