4.1cBSD/usr/src/ucb/pascal/pdx/machine.h

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/* Copyright (c) 1982 Regents of the University of California */

/* static char sccsid[] = "@(#)machine.h 1.3 3/8/82"; */

/*
 * Definitions for the machine module.
 *
 * This module has the low level machine interface.  This consists
 * mostly of dealing with machine instructions and also setting
 * and unsetting breakpoints.
 */

ADDRESS pc;			/* current program counter */
LINENO curline;			/* line number associated with pc */
SYM *curfunc;			/* pointer to active function symbol */
short errnum;			/* current error number */

setbp();			/* set a breakpoint */
unsetbp();			/* unset a breakpoint */
BOOLEAN isbperr();		/* test if a breakpoint has occurred */
printerror();			/* print out an execution error message */
ADDRESS nextaddr();		/* address of next line to be executed */
BOOLEAN isendofproc();		/* test if address is at end of procedure */
printinst(), printninst();	/* print the instruction at a given address */
printdata(), printndata();	/* print the contents of a given data address */