usr/src/usr.bin/pascal/pdx/process/rdwr.c

/*-
 * Copyright (c) 1980, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)rdwr.c	8.1 (Berkeley) %G%";
#endif /* not lint */

/*
 * This routine is used to access the debuggee process from
 * outside the "process" module.
 *
 * They invoke "pio" which eventually leads to a call to "ptrace".
 * The system generates an I/O error when a ptrace fails, we catch
 * that here and assume its due to a misguided address.
 */

#include "defs.h"
#include <errno.h>
#include "process.h"
#include "process.rep"

#	include "pxinfo.h"

typedef int INTFUNC();

extern INTFUNC *onsyserr();

LOCAL badaddr;
LOCAL PIO_OP rwflg;
LOCAL rwerr();

/*
 * Read/Write to the process' data area.
 */

drdwr(rw, buff, addr, nbytes)
PIO_OP rw;
char *buff;
ADDRESS addr;
int nbytes;
{
	INTFUNC *f;

	f = onsyserr(EIO, rwerr);
	badaddr = addr;
	rwflg = rw;
	pio(process, rw, DATASEG, buff, addr, nbytes);
	onsyserr(EIO, f);
}

/*
 * Error handler.
 */

LOCAL rwerr()
{
	error("bad %s process address 0x%x",
		rwflg == PREAD ? "read" : "write", badaddr);
}
Commit	Line	Data
	1	/*-
	2	* Copyright (c) 1980, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* %sccs.include.redist.c%
	6	*/
	7
	8	#ifndef lint
	9	static char sccsid[] = "@(#)rdwr.c 8.1 (Berkeley) %G%";
	10	#endif /* not lint */
	11
	12	/*
	13	* This routine is used to access the debuggee process from
	14	* outside the "process" module.
	15	*
	16	* They invoke "pio" which eventually leads to a call to "ptrace".
	17	* The system generates an I/O error when a ptrace fails, we catch
	18	* that here and assume its due to a misguided address.
	19	*/
	20
	21	#include "defs.h"
	22	#include <errno.h>
	23	#include "process.h"
	24	#include "process.rep"
	25
	26	# include "pxinfo.h"
	27
	28	typedef int INTFUNC();
	29
	30	extern INTFUNC *onsyserr();
	31
	32	LOCAL badaddr;
	33	LOCAL PIO_OP rwflg;
	34	LOCAL rwerr();
	35
	36	/*
	37	* Read/Write to the process' data area.
	38	*/
	39
	40	drdwr(rw, buff, addr, nbytes)
	41	PIO_OP rw;
	42	char *buff;
	43	ADDRESS addr;
	44	int nbytes;
	45	{
	46	INTFUNC *f;
	47
	48	f = onsyserr(EIO, rwerr);
	49	badaddr = addr;
	50	rwflg = rw;
	51	pio(process, rw, DATASEG, buff, addr, nbytes);
	52	onsyserr(EIO, f);
	53	}
	54
	55	/*
	56	* Error handler.
	57	*/
	58
	59	LOCAL rwerr()
	60	{
	61	error("bad %s process address 0x%x",
	62	rwflg == PREAD ? "read" : "write", badaddr);
	63	}