4.3BSD - /usr/src/ucb/pascal/pdx/machine.h

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  *
   6:  *	@(#)machine.h	5.1 (Berkeley) 6/6/85
   7:  */
   8: 
   9: /*
  10:  * Definitions for the machine module.
  11:  *
  12:  * This module has the low level machine interface.  This consists
  13:  * mostly of dealing with machine instructions and also setting
  14:  * and unsetting breakpoints.
  15:  */
  16: 
  17: ADDRESS pc;         /* current program counter */
  18: LINENO curline;         /* line number associated with pc */
  19: SYM *curfunc;           /* pointer to active function symbol */
  20: short errnum;           /* current error number */
  21: 
  22: setbp();            /* set a breakpoint */
  23: unsetbp();          /* unset a breakpoint */
  24: BOOLEAN isbperr();      /* test if a breakpoint has occurred */
  25: printerror();           /* print out an execution error message */
  26: ADDRESS nextaddr();     /* address of next line to be executed */
  27: BOOLEAN isendofproc();      /* test if address is at end of procedure */
  28: printinst(), printninst();  /* print the instruction at a given address */
  29: printdata(), printndata();  /* print the contents of a given data address */

Defined variables