working on exposing vga to userspace

rocklibc/src/syscall.c

@@ -73,4 +73,12 @@ void* sbrk(int32_t increment) {
 
 int brk(void *addr) {
     return syscall1(SYS_BRK, (uint32_t)addr);
+}
+
+void* mmap(int fd) {
+    return (void*)syscall1(SYS_MMAP, fd);
+}
+
+int ioctl(int fd, uint32_t request, void* arg) {
+    return syscall3(SYS_IOCTL, fd, request, arg);
 }