Kernel: We can create basic userspace processes

These are still allocated on the kernel memory

kernel/include/kernel/Syscall.h

@@ -1,4 +1,20 @@
 #pragma once
 
-#define SYS_TEST 0
-#define SYS_PUTC 1
+#define SYS_EXIT 1
+#define SYS_READ 2
+#define SYS_WRITE 3
+
+#include <stdint.h>
+
+namespace Kernel
+{
+
+	template<typename T1 = void*, typename T2 = void*, typename T3 = void*>
+	inline int syscall(int syscall, T1 arg1 = nullptr, T2 arg2 = nullptr, T3 arg3 = nullptr)
+	{
+		int ret;
+		asm volatile("int $0x80" : "=a"(ret) : "a"(syscall), "b"((uintptr_t)arg1), "c"((uintptr_t)arg2), "d"((uintptr_t)arg3) : "memory");
+		return ret;
+	}
+
+}