Reorganized system call library; uses separate file per call now.

New configuration header file to include/ exclude functionality.
Extracted privileged features from struct proc and create new struct priv.
Renamed various system calls for readability.

kernel/system/do_abort.c

@@ -0,0 +1,46 @@
+#include "../system.h"
+#include <unistd.h>
+
+
+/* The system call implemented in this file:
+ *   m_type:	SYS_ABORT
+ *
+ * The parameters for this system call are:
+ *    m1_i1:	ABRT_HOW 	(how to abort, possibly fetch monitor params)	
+ *    m1_i2:	ABRT_MON_PROC 	(proc nr to get monitor params from)	
+ *    m1_i3:	ABRT_MON_LEN	(length of monitor params)
+ *    m1_p1:	ABRT_MON_ADDR 	(virtual address of params)	
+ */
+#if USE_ABORT
+
+/*===========================================================================*
+ *				do_abort				     *
+ *===========================================================================*/
+PUBLIC int do_abort(m_ptr)
+message *m_ptr;			/* pointer to request message */
+{
+/* Handle sys_abort. MINIX is unable to continue. This can originate in the
+ * PM (normal abort or panic) or FS (panic), or TTY (user issued CTRL-ALT-DEL 
+ * or ESC after debugging dumps).
+ */
+  int how = m_ptr->ABRT_HOW;
+  
+  if (how == RBT_MONITOR) {
+      /* The monitor is to run the specified instructions. */
+      int proc_nr = m_ptr->ABRT_MON_PROC;
+      int length = m_ptr->ABRT_MON_LEN + 1;
+      vir_bytes src_vir = (vir_bytes) m_ptr->ABRT_MON_ADDR;
+      phys_bytes src_phys = numap_local(proc_nr, src_vir, length);
+
+      /* Validate length and address of shutdown code before copying. */
+      if (length > kinfo.params_size || src_phys == 0) 
+	  phys_copy(vir2phys("delay;boot"), kinfo.params_base, 11);
+      else
+          phys_copy(src_phys, kinfo.params_base, (phys_bytes) length);
+  }
+  prepare_shutdown(how);
+  return(OK);				/* pro-forma (really EDISASTER) */
+}
+
+#endif /* USE_ABORT */
+