IOPL, VM, and serial debug output (disabled).

2005-09-30 12:54:59 +00:00
parent 9528152f68
commit 9bee3f4b08
13 changed files with 416 additions and 5 deletions
@@ -0,0 +1,33 @@
+/* The system call implemented in this file:
+ *   m_type:	SYS_IOPENABLE
+ *
+ * The parameters for this system call are:
+ *    m2_i2:	PROC_NR		(process to give I/O Protection Level bits)
+ *
+ * Author:
+ *    Jorrit N. Herder <jnherder@cs.vu.nl>
+ */
+
+#include "../kernel.h"
+#include "../system.h"
+
+/*===========================================================================*
+ *			        do_iopenable				     *
+ *===========================================================================*/
+PUBLIC int do_iopenable(m_ptr)
+register message *m_ptr;	/* pointer to request message */
+{
+  int proc_nr;
+
+#if 1 /* ENABLE_USERPRIV && ENABLE_USERIOPL */
+  proc_nr= m_ptr->PROC_NR;
+  if (proc_nr == SELF)
+  	proc_nr = m_ptr->m_source;
+  enable_iop(proc_addr(proc_nr));
+  return(OK);
+#else
+  return(EPERM);
+#endif
+}
+
+