[unix-history] / usr / src / usr.bin / pascal / pdx / process / start.c

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

static char sccsid[] = "@(#)start.c 1.2 %G%";

/*
 * Begin execution.
 *
 * For px, pstart does a traced exec to read in px and then stop.  But we
 * want control after px has read in the obj file and before it starts
 * executing.  The zeroth argument to px tells it to give us control
 * by sending itself a signal just prior to interpreting.
 *
 * We set a "END_BP" breakpoint at the end of the code so that the
 * process data doesn't disappear after the program terminates.
 */

#include "defs.h"
#include <signal.h>
#include "process.h"
#include "machine.h"
#include "main.h"
#include "breakpoint.h"
#include "source.h"
#include "object.h"
#include "mappings.h"
#include "sym.h"
#include "process.rep"

#	if (isvaxpx)
#		include "pxinfo.h"
#	endif

LOCAL PROCESS pbuf;

start(argv, infile, outfile)
char **argv;
char *infile, *outfile;
{
	char *cmd;

	process = &pbuf;
	setsigtrace();
#	if (isvaxpx)
		cmd = "px";
#	else
		cmd = argv[0];
#	endif
	pstart(process, cmd, argv, infile, outfile);
	if (process->status == STOPPED) {
#		if (isvaxpx)
			TRAPARGS *ap, t;

			pcont(process);
			if (process->status != STOPPED) {
				if (option('t')) {
					quit(process->exitval);
				} else {
					panic("px exited with %d", process->exitval);
				}
			}
			dread(&ap, process->fp + 2*sizeof(int), sizeof(ap));
			dread(&t, ap, sizeof(TRAPARGS));
			if (t.nargs != 5) {
				if (option('t')) {
					unsetsigtraces(process);
					pcont(process);
					quit(process->exitval);
				} else {
					panic("start: args out of sync");
				}
			}
			DISPLAY = t.disp;
			DP = t.dp;
			ENDOFF = t.objstart;
			PCADDRP = t.pcaddrp;
			LOOPADDR = t.loopaddr;
#		endif
		pc = 0;
		curfunc = program;
		if (objsize != 0) {
			addbp(lastaddr(), END_BP, NIL, NIL, NIL, 0);
		}
	} else {
		panic("could not start program");
	}
}

/*
 * Note the termination of the program.  We do this so as to avoid
 * having the process exit, which would make the values of variables
 * inaccessible.
 *
 * Although the END_BP should really be deleted, it is taken
 * care of by fixbps the next time the program runs.
 */

endprogram()
{
	char *filename;

	if (ss_variables) {
		prvarnews();
	}
	printf("\nexecution completed\n");
	curfunc = program;
	if ((filename = srcfilename(pc)) != cursource) {
		skimsource(filename);
	}
	curline = lastlinenum;
	erecover();
}

/*
 * set up what signals we want to trace
 */

LOCAL setsigtrace()
{
	register int i;
	register PROCESS *p;

	p = process;
	for (i = 1; i < NSIG; i++) {
		psigtrace(p, i, TRUE);
	}
	psigtrace(p, SIGHUP, FALSE);
	psigtrace(p, SIGKILL, FALSE);
}
Commit	Line	Data
b4b7c436 ML	1	/* Copyright (c) 1982 Regents of the University of California */
b4b7c436 ML	2
da31632a	3	static char sccsid[] = "@(#)start.c 1.2 %G%";
b4b7c436 ML	4
	5	/*
	6	* Begin execution.
	7	*
	8	* For px, pstart does a traced exec to read in px and then stop. But we
	9	* want control after px has read in the obj file and before it starts
da31632a	10	* executing. The zeroth argument to px tells it to give us control
b4b7c436 ML	11	* by sending itself a signal just prior to interpreting.
	12	*
	13	* We set a "END_BP" breakpoint at the end of the code so that the
	14	* process data doesn't disappear after the program terminates.
	15	*/
	16
	17	#include "defs.h"
	18	#include <signal.h>
	19	#include "process.h"
	20	#include "machine.h"
da31632a	21	#include "main.h"
b4b7c436 ML	22	#include "breakpoint.h"
	23	#include "source.h"
	24	#include "object.h"
	25	#include "mappings.h"
	26	#include "sym.h"
	27	#include "process.rep"
	28
	29	# if (isvaxpx)
	30	# include "pxinfo.h"
	31	# endif
	32
	33	LOCAL PROCESS pbuf;
	34
	35	start(argv, infile, outfile)
	36	char **argv;
	37	char infile, outfile;
	38	{
da31632a	39	char *cmd;
b4b7c436 ML	40
	41	process = &pbuf;
	42	setsigtrace();
da31632a ML	43	# if (isvaxpx)
	44	cmd = "px";
	45	# else
	46	cmd = argv[0];
	47	# endif
	48	pstart(process, cmd, argv, infile, outfile);
b4b7c436 ML	49	if (process->status == STOPPED) {
b4b7c436 ML	50	# if (isvaxpx)
da31632a ML	51	TRAPARGS *ap, t;
da31632a ML	52
b4b7c436 ML	53	pcont(process);
b4b7c436 ML	54	if (process->status != STOPPED) {
da31632a ML	55	if (option('t')) {
	56	quit(process->exitval);
	57	} else {
	58	panic("px exited with %d", process->exitval);
	59	}
b4b7c436 ML	60	}
	61	dread(&ap, process->fp + 2*sizeof(int), sizeof(ap));
	62	dread(&t, ap, sizeof(TRAPARGS));
	63	if (t.nargs != 5) {
da31632a ML	64	if (option('t')) {
	65	unsetsigtraces(process);
	66	pcont(process);
	67	quit(process->exitval);
	68	} else {
	69	panic("start: args out of sync");
	70	}
b4b7c436 ML	71	}
	72	DISPLAY = t.disp;
	73	DP = t.dp;
	74	ENDOFF = t.objstart;
	75	PCADDRP = t.pcaddrp;
	76	LOOPADDR = t.loopaddr;
	77	# endif
	78	pc = 0;
	79	curfunc = program;
	80	if (objsize != 0) {
	81	addbp(lastaddr(), END_BP, NIL, NIL, NIL, 0);
	82	}
da31632a ML	83	} else {
da31632a ML	84	panic("could not start program");
b4b7c436 ML	85	}
	86	}
	87
	88	/*
	89	* Note the termination of the program. We do this so as to avoid
	90	* having the process exit, which would make the values of variables
	91	* inaccessible.
	92	*
	93	* Although the END_BP should really be deleted, it is taken
	94	* care of by fixbps the next time the program runs.
	95	*/
	96
	97	endprogram()
	98	{
	99	char *filename;
	100
	101	if (ss_variables) {
	102	prvarnews();
	103	}
	104	printf("\nexecution completed\n");
	105	curfunc = program;
	106	if ((filename = srcfilename(pc)) != cursource) {
	107	skimsource(filename);
	108	}
	109	curline = lastlinenum;
	110	erecover();
	111	}
	112
	113	/*
	114	* set up what signals we want to trace
	115	*/
	116
	117	LOCAL setsigtrace()
	118	{
	119	register int i;
	120	register PROCESS *p;
	121
	122	p = process;
	123	for (i = 1; i < NSIG; i++) {
	124	psigtrace(p, i, TRUE);
	125	}
	126	psigtrace(p, SIGHUP, FALSE);
	127	psigtrace(p, SIGKILL, FALSE);
	128	}