working on exposing vga to userspace

rocklibc/include/syscall.h

@@ -17,6 +17,8 @@
 #define SYS_DUP2    23
 #define SYS_LSEEK   24
 #define SYS_WAIT    25
+#define SYS_MMAP    26
+#define SYS_IOCTL   27
 
 int open(const char* path);
 int write(int fd, const void *buf, size_t count);
@@ -25,6 +27,8 @@ int close(int fd);
 
 int lseek(int fd, size_t offset, int whence);
 
+void* mmap(int fd);
+
 void exit(int status) __attribute__((noreturn));
 
 void* sbrk(int32_t increment);
@@ -37,4 +41,6 @@ int exec(const char* path);
 int dup2(int src, int dst);
 int waitpid(int pid, int* status);
 
+int ioctl(int fd, uint32_t request, void* arg);
+
 #endif