4.4BSD/usr/src/contrib/gdb-4.7.lbl/gdb/nindy-share/nindy.c
/*****************************************************************************
* Copyright 1990, 1992 Free Software Foundation, Inc.
*
* This code was donated by Intel Corp.
*
* Intel hereby grants you permission to copy, modify, and
* distribute this software and its documentation. Intel grants
* this permission provided that the above copyright notice
* appears in all copies and that both the copyright notice and
* this permission notice appear in supporting documentation. In
* addition, Intel grants this permission provided that you
* prominently mark as not part of the original any modifications
* made to this software or documentation, and that the name of
* Intel Corporation not be used in advertising or publicity
* pertaining to distribution of the software or the documentation
* without specific, written prior permission.
*
* Intel Corporation does not warrant, guarantee or make any
* representations regarding the use of, or the results of the use
* of, the software and documentation in terms of correctness,
* accuracy, reliability, currentness, or otherwise; and you rely
* on the software, documentation and results solely at your own risk.
*****************************************************************************/
static char rcsid[] =
"Id: nindy.c,v 1.1.1.1 1991/03/28 16:20:57 rich Exp $";
/******************************************************************************
*
* NINDY INTERFACE ROUTINES
*
* The routines in this file define and implement an interface between code
* (such as a high-level debugger) running on a remote host and the NINDY
* ROM monitor on an i960 board. These routines are to be linked with
* and called by the host code.
*
* These routines handle both the formatting/transferring of commands to NINDY
* and the receipt/formatting of data returned in response to them. The
* actual transfer protocol is hidden from the host programmer within them.
* For a full description of the lowest level NINDY/host transfer protocol,
* see the block header of the file gdb.c, in the NINDY source code.
*
* The caller of these routines should be aware that:
*
* (1) ninConnect() should be called to open communications with the
* remote NINDY board before any of the other routines are invoked.
*
* (2) almost all interactions are driven by the host: nindy sends information
* in response to host commands.
*
* (3) the lone exception to (2) is the single character DLE (^P, 0x10).
* Receipt of a DLE from NINDY indicates that the application program
* running under NINDY has stopped execution and that NINDY is now
* available to talk to the host (all other communication received after
* the application has been started should be presumed to come from the
* application and should be passed on by the host to stdout).
*
* (4) the reason the application program stopped can be determined with the
* ninStopWhy() function. There are three classes of stop reasons:
*
* (a) the application has terminated execution.
* The host should take appropriate action.
*
* (b) the application had a fault or trace event.
* The host should take appropriate action.
*
* (c) the application wishes to make a service request (srq) of the host;
* e.g., to open/close a file, read/write a file, etc. The ninSrq()
* function should be called to determine the nature of the request
* and process it.
*
* WARNING: Changes made here should be tested in both gdb960 and comm960.
*
******************************************************************************/
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/types.h> /* Needed by file.h on Sys V */
#include <sys/file.h>
#include <signal.h>
#include <sys/stat.h>
#include <fcntl.h> /* Needed on Sys V */
#include "ttycntl.h"
#include "block_io.h"
#include "wait.h"
#include "env.h"
#ifdef USG
# include <unistd.h>
# include "sysv.h"
#else /* BSD */
# include "string.h"
# include <sys/time.h>
#endif
#ifndef ERROR
#define ERROR -1
#endif
#define DLE 0x10 /* ^P */
#define XON 0x11 /* ^Q */
#define XOFF 0x13 /* ^S */
#define ESC 0x1b
#define REGISTER_BYTES ((36*4) + (4*8))
#define TIMEOUT -1
extern char *malloc();
extern void free();
static int quiet = 0; /* 1 => stifle unnecessary messages */
static int nindy_fd; /* File descriptor of tty connected to 960/NINDY board*/
static int old_nindy = 0; /* 1 => use old (hex) communication protocol */
static ninStrGet();
/****************************
* *
* MISCELLANEOUS UTILTIES *
* *
****************************/
#if 0
/******************************************************************************
* byteswap:
* If the host byte order is different from 960 byte order (i.e., the
* host is big-endian), reverse the bytes in the passed value; otherwise,
* return the passed value unchanged.
*
******************************************************************************/
static
long
byteswap( n )
long n;
{
long rev;
int i;
static short test = 0x1234;
if (*((char *) &test) == 0x12) {
/*
* Big-endian host, swap the bytes.
*/
rev = 0;
for ( i = 0; i < sizeof(n); i++ ){
rev <<= 8;
rev |= n & 0xff;
n >>= 8;
}
n = rev;
}
return n;
}
#endif
/******************************************************************************
* get_int:
* Copy the little-endian integer pointed at by 'p' and return it in
* the host byte order. 'p' may be an unaligned address, so do the copy
* a byte at a time.
******************************************************************************/
int
get_int( p )
unsigned char *p;
{
int n;
int i;
n = 0;
p += sizeof(int) - 1;
for ( i = 0; i < sizeof(n); i++ ){
n <<= 8;
n |= *p--;
}
return n;
}
/******************************************************************************
* put_int:
* Copy the integer 'n' (which is in host byte order) to the location
* pointed at by 'p', leaving it in little-endian byte order.
* 'p' may be an unaligned address, so do the move a byte at a time.
******************************************************************************/
int
put_int( p, n )
unsigned char *p;
int n;
{
int i;
for ( i = 0; i < sizeof(n); i++ ){
*p++ = n;
n >>= 8;
}
}
/******************************************************************************
* say:
* This is a printf that takes at most two arguments (in addition to the
* format string) and that outputs nothing if verbose output has been
* suppressed.
******************************************************************************/
/* FIXME: use varargs for this. */
static
say( fmt, arg1, arg2 )
char *fmt;
int arg1, arg2;
{
if ( !quiet ){
printf( fmt, arg1, arg2 );
fflush( stdout );
}
}
/******************************************************************************
* exists:
* Creates a full pathname by concatenating up to three name components
* onto a specified base name; optionally looks up the base name as a
* runtime environment variable; and checks to see if the file or
* directory specified by the pathname actually exists.
*
* Returns: the full pathname if it exists, NULL otherwise.
* (returned pathname is in malloc'd memory and must be freed
* by caller).
*****************************************************************************/
static
char *
exists( base, c1, c2, c3, env )
char *base; /* Base directory of path */
char *c1, *c2, *c3; /* Components (subdirectories and/or file name) to be
* appended onto the base directory name. One or
* more may be omitted by passing NULL pointers.
*/
int env; /* If 1, '*base' is the name of an environment variable
* to be examined for the base directory name;
* otherwise, '*base' is the actual name of the
* base directory.
*/
{
struct stat buf;/* For call to 'stat' -- never examined */
char *path; /* Pointer to full pathname (malloc'd memory) */
int len; /* Length of full pathname (incl. terminator) */
extern char *getenv();
if ( env ){
base = getenv( base );
if ( base == NULL ){
return NULL;
}
}
len = strlen(base) + 4;
/* +4 for terminator and "/" before each component */
if ( c1 != NULL ){
len += strlen(c1);
}
if ( c2 != NULL ){
len += strlen(c2);
}
if ( c3 != NULL ){
len += strlen(c3);
}
path = malloc( len );
strcpy( path, base );
if ( c1 != NULL ){
strcat( path, "/" );
strcat( path, c1 );
if ( c2 != NULL ){
strcat( path, "/" );
strcat( path, c2 );
if ( c3 != NULL ){
strcat( path, "/" );
strcat( path, c3 );
}
}
}
if ( stat(path,&buf) != 0 ){
free( path );
path = NULL;
}
return path;
}
/*****************************
* *
* LOW-LEVEL COMMUNICATION *
* *
*****************************/
/******************************************************************************
* timed_read:
* Read up to 'n' characters (less if fewer are available) from the NINDY
* tty. Wait up to 'timeout' seconds for something to arrive. Return
* the number of characters read, 0 on timeout.
******************************************************************************/
#ifdef USG
static int saw_alarm;
static void
alarm_handler()
{
saw_alarm = 1;
}
static
int
timed_read(buf,n,timeout)
unsigned char * buf; /* Where to put the read characters */
int n; /* Max number of characters to read */
int timeout; /* Timeout, in seconds */
{
void (*old_alarm)(); /* Save alarm signal handler here on entry */
int cnt;
old_alarm = signal( SIGALRM,alarm_handler );
saw_alarm = 0;
alarm(timeout);
do {
cnt = n;
TTY_NBREAD(nindy_fd,cnt,buf);
} while ( (cnt <= 0) && !saw_alarm );
alarm(0);
signal( SIGALRM,old_alarm );
return saw_alarm ? 0 : cnt;
}
#else /* BSD */
static
int
timed_read(buf,n,timeout)
unsigned char * buf; /* Where to put the read characters */
int n; /* Max number of characters to read */
int timeout; /* Timeout, in seconds */
{
struct timeval t;
fd_set f;
t.tv_sec = (long) timeout;
t.tv_usec= 0;
FD_ZERO( &f );
FD_SET( nindy_fd, &f );
if ( select(nindy_fd+1,&f,0,0,&t) ){
return read( nindy_fd, buf, n );
} else {
return 0;
}
}
#endif
/******************************************************************************
* rdnin:
* Read *exactly* 'n' characters from the NINDY tty. Translate escape
* sequences into single characters, counting each such sequence as
* 1 character.
*
* An escape sequence consists of ESC and a following character. The
* ESC is discarded and the other character gets bit 0x40 cleared --
* thus ESC P == ^P, ESC S == ^S, ESC [ == ESC, etc.
*
* Return 1 if successful, 0 if more than 'timeout' seconds pass without
* any input.
******************************************************************************/
static
int
rdnin(buf,n,timeout)
unsigned char * buf; /* Where to place characters read */
int n; /* Number of characters to read */
int timeout; /* Timeout, in seconds */
{
static unsigned char *mybuf = NULL;
/* Dynamically allocated local buffer */
static int mybuflen = 0;
/* Current size of local buffer */
int escape_seen; /* 1 => last character of a read was an ESC */
int nread; /* Number of chars returned by timed_read() */
unsigned char c;
int i;
/* Make sure local buffer is big enough
*/
if ( n > mybuflen ){
if ( mybuf ){
free( mybuf );
}
mybuf = (unsigned char *) malloc( mybuflen=n );
}
/* More than one loop will be necessary if there are any
* escape sequences in the input
*/
escape_seen = 0;
while ( n ){
nread = timed_read(mybuf,n,timeout);
if ( nread <= 0 ){
return 0; /* TIMED OUT */
}
/* Copy characters from local buffer to caller's buffer,
* converting escape sequences as they're encountered.
*/
for ( i = 0; i < nread; i++ ){
c = mybuf[i];
if ( escape_seen ){
escape_seen = 0;
c &= ~0x40;
} else if ( c == ESC ){
if ( ++i >= nread ){
/* Need to refill local buffer */
escape_seen = 1;
break;
}
c = mybuf[i] & ~0x40;
}
*buf++ = c;
n--;
}
}
return 1;
}
/******************************************************************************
* getpkt:
* Read a packet from a remote NINDY, with error checking, into the
* indicated buffer.
*
* Return packet status byte on success, TIMEOUT on failure.
******************************************************************************/
static
int
getpkt(buf)
unsigned char *buf;
{
int i;
unsigned char hdr[3]; /* Packet header:
* hdr[0] = low byte of message length
* hdr[1] = high byte of message length
* hdr[2] = message status
*/
int cnt; /* Message length (status byte + data) */
unsigned char cs_calc; /* Checksum calculated */
unsigned char cs_recv; /* Checksum received */
static char errfmt[] =
"Bad checksum (recv=0x%02x; calc=0x%02x); retrying\r\n";
while (1){
if ( !rdnin(hdr,3,5) ){
return TIMEOUT;
}
cnt = (hdr[1]<<8) + hdr[0] - 1;
/* -1 for status byte (already read) */
/* Caller's buffer may only be big enough for message body,
* without status byte and checksum, so make sure to read
* checksum into a separate buffer.
*/
if ( !rdnin(buf,cnt,5) || !rdnin(&cs_recv,1,5) ){
return TIMEOUT;
}
/* Calculate checksum
*/
cs_calc = hdr[0] + hdr[1] + hdr[2];
for ( i = 0; i < cnt; i++ ){
cs_calc += buf[i];
}
if ( cs_calc == cs_recv ){
write (nindy_fd, "+", 1);
return hdr[2];
}
/* Bad checksum: report, send NAK, and re-receive
*/
fprintf(stderr, errfmt, cs_recv, cs_calc );
write (nindy_fd, "-", 1);
}
}
/******************************************************************************
* putpkt:
* Send a packet to NINDY, checksumming it and converting special
* characters to escape sequences.
******************************************************************************/
/* This macro puts the character 'c' into the buffer pointed at by 'p',
* and increments the pointer. If 'c' is one of the 4 special characters
* in the transmission protocol, it is converted into a 2-character
* escape sequence.
*/
#define PUTBUF(c,p) \
if ( c == DLE || c == ESC || c == XON || c == XOFF ){ \
*p++ = ESC; \
*p++ = c | 0x40; \
} else { \
*p++ = c; \
}
static
putpkt( msg, len )
unsigned char *msg; /* Command to be sent, without lead ^P (\020) or checksum */
int len; /* Number of bytes in message */
{
static char *buf = NULL;/* Local buffer -- build packet here */
static int maxbuf = 0; /* Current length of buffer */
unsigned char ack; /* Response received from NINDY */
unsigned char checksum; /* Packet checksum */
char *p; /* Pointer into buffer */
int lenhi, lenlo; /* High and low bytes of message length */
int i;
/* Make sure local buffer is big enough. Must include space for
* packet length, message body, and checksum. And in the worst
* case, each character would expand into a 2-character escape
* sequence.
*/
if ( maxbuf < ((2*len)+10) ){
if ( buf ){
free( buf );
}
buf = malloc( maxbuf=((2*len)+10) );
}
/* Attention, NINDY!
*/
write( nindy_fd, "\020", 1 );
lenlo = len & 0xff;
lenhi = (len>>8) & 0xff;
checksum = lenlo + lenhi;
p = buf;
PUTBUF( lenlo, p );
PUTBUF( lenhi, p );
for ( i=0; i<len; i++ ){
PUTBUF( msg[i], p );
checksum += msg[i];
}
PUTBUF( checksum, p );
/* Send checksummed message over and over until we get a positive ack
*/
write( nindy_fd, buf, p-buf );
while (1){
if ( !rdnin(&ack,1,5) ){
/* timed out */
fprintf(stderr,"ACK timed out; resending\r\n");
write(nindy_fd,"\020",1);/* Attention, NINDY! */
write( nindy_fd, buf, p-buf );
} else if ( ack == '+' ){
return;
} else if ( ack == '-' ){
fprintf( stderr, "Remote NAK; resending\r\n" );
write( nindy_fd, buf, p-buf );
} else {
fprintf( stderr, "Bad ACK, ignored: <%c>\r\n", ack );
}
}
}
/******************************************************************************
* send:
* Send a message to a remote NINDY. Check message status byte
* for error responses. If no error, return NINDY reponse (if any).
******************************************************************************/
static
send( out, len, in )
unsigned char *out; /* Message to be sent to NINDY */
int len; /* Number of meaningful bytes in out buffer */
unsigned char *in; /* Where to put response received from NINDY */
{
char *fmt;
int status;
static char *errmsg[] = {
"", /* 0 */
"Buffer overflow", /* 1 */
"Unknown command", /* 2 */
"Wrong amount of data to load register(s)", /* 3 */
"Missing command argument(s)", /* 4 */
"Odd number of digits sent to load memory", /* 5 */
"Unknown register name", /* 6 */
"No such memory segment", /* 7 */
"No breakpoint available", /* 8 */
"Can't set requested baud rate", /* 9 */
};
# define NUMERRS ( sizeof(errmsg) / sizeof(errmsg[0]) )
static char err1[] = "Unknown error response from NINDY: #%d\r\n";
static char err2[] = "Error response #%d from NINDY: %s\r\n";
while (1){
putpkt(out,len);
status = getpkt(in);
if ( status == TIMEOUT ){
fprintf( stderr, "Response timed out; resending\r\n" );
} else {
break;
}
}
if ( status ){
fmt = status > NUMERRS ? err1 : err2;
fprintf( stderr, fmt, status, errmsg[status] );
abort();
}
}
/************************
* *
* BAUD RATE ROUTINES *
* *
************************/
/* Table of baudrates known to be acceptable to NINDY. Each baud rate
* appears both as character string and as a Unix baud rate constant.
*/
struct baudrate {
char *string;
int rate;
};
static struct baudrate baudtab[] = {
"1200", B1200,
"2400", B2400,
"4800", B4800,
"9600", B9600,
"19200", B19200,
"38400", B38400,
NULL, 0 /* End of table */
};
/******************************************************************************
* parse_baudrate:
* Look up the passed baud rate in the baudrate table. If found, change
* our internal record of the current baud rate, but don't do anything
* about the tty just now.
*
* Return pointer to baudrate structure on success, NULL on failure.
******************************************************************************/
static
struct baudrate *
parse_baudrate(s)
char *s; /* Desired baud rate, as an ASCII (decimal) string */
{
int i;
for ( i=0; baudtab[i].string != NULL; i++ ){
if ( !strcmp(baudtab[i].string,s) ){
return &baudtab[i];
}
}
return NULL;
}
/******************************************************************************
* try_baudrate:
* Try speaking to NINDY via the specified file descriptor at the
* specified baudrate. Assume success if we can send an empty command
* with a bogus checksum and receive a NAK (response of '-') back within
* one second.
*
* Return 1 on success, 0 on failure.
******************************************************************************/
static int
try_baudrate( fd, brp )
int fd;
struct baudrate *brp;
{
TTY_STRUCT tty;
unsigned char c;
/* Set specified baud rate and flush all pending input */
ioctl( fd, TIOCGETP, &tty );
TTY_REMOTE( tty, brp->rate );
ioctl( fd, TIOCSETP, &tty );
tty_flush( fd );
/* Send empty command with bad checksum, hope for NAK ('-') response */
write( fd, "\020\0\0\001", 4 );
if ( !rdnin(&c,1,1) ){
/* timed out */
return 0;
} else {
return (c == '-');
}
}
/******************************************************************************
* autobaud:
* Get NINDY talking over the specified file descriptor at the specified
* baud rate. First see if NINDY's already talking at 'baudrate'. If
* not, run through all the legal baudrates in 'baudtab' until one works,
* and then tell NINDY to talk at 'baudrate' instead.
******************************************************************************/
static
autobaud( fd, brp )
int fd;
struct baudrate *brp;
{
int i;
TTY_STRUCT tty;
int failures;
say("NINDY at wrong baud rate? Trying to autobaud...\n");
failures = i = 0;
while ( 1 ){
say( "\r%s... ", baudtab[i].string );
if ( try_baudrate(fd, &baudtab[i]) ){
break;
}
if ( baudtab[++i].string == NULL ){
/* End of table -- wraparound */
i = 0;
if ( failures++ ){
say("\nAutobaud failed again. Giving up.\n");
exit(1);
} else {
say("\nAutobaud failed. Trying again...\n");
}
}
}
/* Found NINDY's current baud rate; now change it.
*/
say("Changing NINDY baudrate to %s\n", brp->string);
ninBaud( brp->string );
/* Change our baud rate back to rate to which we just set NINDY.
*/
ioctl( fd, TIOCGETP, &tty );
TTY_REMOTE( tty, brp->rate );
ioctl( fd, TIOCSETP, &tty );
}
/*****************************************************************************
* coffstrip:
* Passed the name of an executable object file in either b.out or
* COFF format.
*
* If the file is in b.out format, it is converted to little-endian
* COFF format (i.e., the format suitable for downloading to NINDY).
* In either case, the COFF file is then stripped of all relocation
* and symbol information, to speed up its download.
*
* RETURNS:
* pointer to the name of the stripped COFF file (a tmp file that has
* been created and closed); NULL on error.
*****************************************************************************/
#if 0
#define STRIP "bfd_strip" /* Name of bfd strip utility */
#endif
#define NINDY_OBJ "coff-Intel-little"
char *
coffstrip( fn )
char *fn; /* Name of object file */
{
extern char *mktemp();
static char template[] = "/tmp/commXXXXXX";
static char newfile[sizeof template];
char *strip; /* Pointer to full pathname of strip utility */
int success; /* Return value */
int pid; /* Process ID of xmodem transfer utility */
WAITTYPE w; /* xmodem transfer completion status */
int wret; /* Value returned by wait */
char *tempfile; /* Stripped copy of object file */
char buf[400];
strcpy (newfile, template);
tempfile = mktemp( newfile );
#if 0
/* Make sure the strip utility is findable.
*/
if ( ((strip = exists("G960BIN",STRIP,NULL,NULL,1)) == NULL)
&& ((strip = exists("G960BASE","bin",STRIP, NULL,1)) == NULL)
#ifdef HOST
&& ((strip = exists(DEFAULT_BASE,HOST,"bin",STRIP,0)) == NULL)
#endif
){
fprintf(stderr,"Can't find '%s' utility\n",STRIP);
fprintf(stderr,"Check env variables G960BIN and G960BASE\n");
return NULL;
}
#endif
success = 0;
sprintf( buf, "cp %s %s", fn, tempfile );
printf ("%s\n", buf);
if ( system(buf) == 0 ){
sprintf(buf, "%s -d %s %s", STRIP, NINDY_OBJ, tempfile);
printf ("%s\n", buf);
if ( system(buf) == 0 ){
return tempfile;
}
}
return NULL;
}
/**********************************
* *
* NINDY INTERFACE ROUTINES *
* *
* ninConnect *MUST* be the first *
* one of these routines called. *
**********************************/
/******************************************************************************
* ninBaud:
* Ask NINDY to change the baud rate on its serial port.
* Assumes we know the baud rate at which NINDY's currently talking.
******************************************************************************/
ninBaud( baudrate )
char *baudrate; /* Desired baud rate, as a string of ASCII decimal
* digits.
*/
{
unsigned char msg[100];
if ( old_nindy ){
OninBaud( baudrate );
return;
}
tty_flush( nindy_fd );
/* Can't use "send" because NINDY reply will be unreadable after
* baud rate change.
*/
sprintf( msg, "z%s", baudrate );
putpkt( msg, strlen(msg)+1 ); /* "+1" to send terminator too */
}
/******************************************************************************
* ninBptDel:
* Ask NINDY to delete the specified type of *hardware* breakpoint at
* the specified address. If the 'addr' is -1, all breakpoints of
* the specified type are deleted.
******************************************************************************/
ninBptDel( addr, type )
long addr; /* Address in 960 memory */
char type; /* 'd' => data bkpt, 'i' => instruction breakpoint */
{
unsigned char buf[10];
if ( old_nindy ){
OninBptDel( addr, type == 'd' ? 1 : 0 );
return;
}
buf[0] = 'b';
buf[1] = type;
if ( addr == -1 ){
send( buf, 2, NULL );
} else {
put_int( &buf[2], addr );
send( buf, 6, NULL );
}
}
/******************************************************************************
* ninBptSet:
* Ask NINDY to set the specified type of *hardware* breakpoint at
* the specified address.
******************************************************************************/
ninBptSet( addr, type )
long addr; /* Address in 960 memory */
char type; /* 'd' => data bkpt, 'i' => instruction breakpoint */
{
unsigned char buf[10];
if ( old_nindy ){
OninBptSet( addr, type == 'd' ? 1 : 0 );
return;
}
buf[0] = 'B';
buf[1] = type;
put_int( &buf[2], addr );
send( buf, 6, NULL );
}
/******************************************************************************
* ninConnect:
* Open the specified tty. Get communications working at the specified
* baud rate. Flush any pending I/O on the tty.
*
* Return the file descriptor, or -1 on failure.
******************************************************************************/
int
ninConnect( name, baudrate, brk, silent, old_protocol )
char *name; /* "/dev/ttyXX" to be opened */
char *baudrate;/* baud rate: a string of ascii decimal digits (eg,"9600")*/
int brk; /* 1 => send break to tty first thing after opening it*/
int silent; /* 1 => stifle unnecessary messages when talking to
* this tty.
*/
int old_protocol;
{
int i;
char *p;
struct baudrate *brp;
/* We will try each of the following paths when trying to open the tty
*/
static char *prefix[] = { "", "/dev/", "/dev/tty", NULL };
if ( old_protocol ){
old_nindy = 1;
return OninConnect( name, baudrate, brk, silent );
}
quiet = silent; /* Make global to this file */
for ( i=0; prefix[i] != NULL; i++ ){
p = malloc(strlen(prefix[i]) + strlen(name) + 1 );
strcpy( p, prefix[i] );
strcat( p, name );
nindy_fd = open(p,O_RDWR);
if ( nindy_fd >= 0 ){
#ifdef TIOCEXCL
/* Exclusive use mode (hp9000 does not support it) */
ioctl(nindy_fd,TIOCEXCL,NULL);
#endif
if ( brk ){
send_break( nindy_fd );
}
brp = parse_baudrate( baudrate );
if ( brp == NULL ){
say("Illegal baudrate %s ignored; using 9600\n",
baudrate);
brp = parse_baudrate( "9600" );
}
if ( !try_baudrate(nindy_fd,brp) ){
autobaud(nindy_fd,brp);
}
tty_flush( nindy_fd );
say( "Connected to %s\n", p );
free(p);
break;
}
free(p);
}
return nindy_fd;
}
/******************************************************************************
* ninDownload:
* Ask NINDY to start up it's COFF downloader. Invoke 'sx' to perform
* the XMODEM download from the host end.
*
* Return 1 on success, 0 on failure.
******************************************************************************/
#define XMODEM "sx" /* Name of xmodem transfer utility */
int
ninDownload( fn, quiet )
char *fn; /* Stripped copy of object file */
int quiet;
{
char *p; /* Pointer to full pathname of sx utility */
int success; /* Return value */
int pid; /* Process ID of xmodem transfer utility */
WAITTYPE w; /* xmodem transfer completion status */
int wret; /* Value returned by wait */
char buf[200];
if ( old_nindy ){
return OninDownload( fn, quiet );
}
/* Make sure the xmodem utility is findable. This must be done before
* we start up the NINDY end of the download (NINDY will hang if we
* don't complete the download).
*/
if ( ((p = exists("G960BIN",XMODEM,NULL,NULL,1)) == NULL)
&& ((p = exists("G960BASE","bin",XMODEM, NULL,1)) == NULL)
#ifdef HOST
&& ((p = exists(DEFAULT_BASE,HOST,"bin",XMODEM,0)) == NULL)
#endif
){
fprintf(stderr,"Can't find '%s' download utility\n",XMODEM);
fprintf(stderr,"Check env variables G960BIN and G960BASE\n");
return 0;
}
if ( !quiet ){
printf( "Downloading %s\n", fn );
}
/* Reset NINDY, wait until "reset-complete" ack,
* and start up the NINDY end of the download.
*/
ninReset();
putpkt((unsigned char *) "D", 1 );
/* Invoke x-modem transfer, a separate process. DON'T
* use system() to do this -- under system V Unix, the
* redirection of stdin/stdout causes the nindy tty to
* lose all the transmission parameters we've set up.
*/
success = 0;
#if defined(USG) && !defined(HAVE_VFORK)
pid = fork ();
#else
pid = vfork ();
#endif
if ( pid == -1 ){
perror( "Can't fork process:" );
} else if ( pid == 0 ){ /* CHILD */
dup2( nindy_fd, 0 ); /* Redirect stdin */
dup2( nindy_fd, 1 ); /* Redirect stout */
if ( quiet ){
execl( p, p, "-q", fn, (char*)0 );
} else {
execl( p, p, fn, (char*)0 );
}
/* Don't get here unless execl fails */
sprintf( buf, "Can't exec %s", p );
perror( buf );
} else { /* PARENT */
do {
wret = wait(&w);
} while ( wret != pid && wret != -1 );
if ( wret == -1 ){
perror( "Wait failed" );
} else if (WIFEXITED(w) && (WEXITSTATUS(w) == 0)){
success = 1;
}
}
return success;
}
/******************************************************************************
* ninGdbExit:
* Ask NINDY to leave GDB mode and print a NINDY prompt.
******************************************************************************/
ninGdbExit()
{
if ( old_nindy ){
OninGdbExit();
return;
}
putpkt((unsigned char *) "E", 1 );
}
/******************************************************************************
* ninGo:
* Ask NINDY to start or continue execution of an application program
* in it's memory at the current ip.
******************************************************************************/
ninGo( step_flag )
int step_flag; /* 1 => run in single-step mode */
{
if ( old_nindy ){
OninGo( step_flag );
return;
}
putpkt((unsigned char *) (step_flag ? "s" : "c"), 1 );
}
/******************************************************************************
* ninMemGet:
* Read a string of bytes from NINDY's address space (960 memory).
******************************************************************************/
ninMemGet(ninaddr, hostaddr, len)
long ninaddr; /* Source address, in the 960 memory space */
unsigned char *hostaddr; /* Destination address, in our memory space */
int len; /* Number of bytes to read */
{
unsigned char buf[BUFSIZE+20];
int cnt; /* Number of bytes in next transfer */
if ( old_nindy ){
OninMemGet(ninaddr, hostaddr, len);
return;
}
for ( ; len > 0; len -= BUFSIZE ){
cnt = len > BUFSIZE ? BUFSIZE : len;
buf[0] = 'm';
put_int( &buf[1], ninaddr );
buf[5] = cnt & 0xff;
buf[6] = (cnt>>8) & 0xff;
send( buf, 7, hostaddr );
ninaddr += cnt;
hostaddr += cnt;
}
}
/******************************************************************************
* ninMemPut:
* Write a string of bytes into NINDY's address space (960 memory).
******************************************************************************/
ninMemPut( ninaddr, hostaddr, len )
long ninaddr; /* Destination address, in NINDY memory space */
unsigned char *hostaddr; /* Source address, in our memory space */
int len; /* Number of bytes to write */
{
unsigned char buf[BUFSIZE+20];
int cnt; /* Number of bytes in next transfer */
if ( old_nindy ){
OninMemPut( ninaddr, hostaddr, len );
return;
}
for ( ; len > 0; len -= BUFSIZE ){
cnt = len > BUFSIZE ? BUFSIZE : len;
buf[0] = 'M';
put_int( &buf[1], ninaddr );
bcopy( hostaddr, buf+5, cnt );
send( buf, cnt+5, NULL );
ninaddr += cnt;
hostaddr += cnt;
}
}
/******************************************************************************
* ninRegGet:
* Retrieve the contents of a 960 register, and return them as a long
* in host byte order.
*
* THIS ROUTINE CAN ONLY BE USED TO READ THE LOCAL, GLOBAL, AND
* ip/ac/pc/tc REGISTERS.
*
******************************************************************************/
long
ninRegGet( regname )
char *regname; /* Register name recognized by NINDY, subject to the
* above limitations.
*/
{
unsigned char outbuf[10];
unsigned char inbuf[20];
if ( old_nindy ){
return OninRegGet( regname );
}
sprintf( outbuf, "u%s:", regname );
send( outbuf, strlen(outbuf), inbuf );
return get_int(inbuf);
}
/******************************************************************************
* ninRegPut:
* Set the contents of a 960 register.
*
* THIS ROUTINE CAN ONLY BE USED TO SET THE LOCAL, GLOBAL, AND
* ip/ac/pc/tc REGISTERS.
*
******************************************************************************/
ninRegPut( regname, val )
char *regname; /* Register name recognized by NINDY, subject to the
* above limitations.
*/
long val; /* New contents of register, in host byte-order */
{
unsigned char buf[20];
int len;
if ( old_nindy ){
OninRegPut( regname, val );
return;
}
sprintf( buf, "U%s:", regname );
len = strlen(buf);
put_int( &buf[len], val );
send( buf, len+4, NULL );
}
/******************************************************************************
* ninRegsGet:
* Get a dump of the contents of the entire 960 register set. The
* individual registers appear in the dump in the following order:
*
* pfp sp rip r3 r4 r5 r6 r7
* r8 r9 r10 r11 r12 r13 r14 r15
* g0 g1 g2 g3 g4 g5 g6 g7
* g8 g9 g10 g11 g12 g13 g14 fp
* pc ac ip tc fp0 fp1 fp2 fp3
*
* Each individual register comprises exactly 4 bytes, except for
* fp0-fp3, which are 8 bytes. All register values are in 960
* (little-endian) byte order.
*
******************************************************************************/
ninRegsGet( regp )
unsigned char *regp; /* Where to place the register dump */
{
if ( old_nindy ){
OninRegsGet( regp );
return;
}
send( (unsigned char *) "r", 1, regp );
}
/******************************************************************************
* ninRegsPut:
* Initialize the entire 960 register set to a specified set of values.
* The format of the register value data should be the same as that
* returned by ninRegsGet.
*
* WARNING:
* All register values must be in 960 (little-endian) byte order.
*
******************************************************************************/
ninRegsPut( regp )
char *regp; /* Pointer to desired values of registers */
{
unsigned char buf[REGISTER_BYTES+10];
if ( old_nindy ){
OninRegsPut( regp );
return;
}
buf[0] = 'R';
bcopy( regp, buf+1, REGISTER_BYTES );
send( buf, REGISTER_BYTES+1, NULL );
}
/******************************************************************************
* ninReset:
* Ask NINDY to perform a soft reset; wait for the reset to complete.
*
******************************************************************************/
ninReset()
{
unsigned char ack;
if ( old_nindy ){
OninReset();
return;
}
while (1){
putpkt((unsigned char *) "X", 1 );
while (1){
if ( !rdnin(&ack,1,5) ){
/* Timed out */
break; /* Resend */
}
if ( ack == '+' ){
return;
}
}
}
}
/******************************************************************************
* ninSrq:
* Assume NINDY has stopped execution of the 960 application program in
* order to process a host service request (srq). Ask NINDY for the
* srq arguments, perform the requested service, and send an "srq
* complete" message so NINDY will return control to the application.
*
******************************************************************************/
ninSrq()
{
unsigned char buf[BUFSIZE];
int retcode;
unsigned char srqnum;
int i;
int offset;
int arg[MAX_SRQ_ARGS];
if ( old_nindy ){
OninSrq();
return;
}
/* Get srq number and arguments
*/
send((unsigned char *) "!", 1, buf );
srqnum = buf[0];
for ( i=0, offset=1; i < MAX_SRQ_ARGS; i++, offset+=4 ){
arg[i] = get_int(&buf[offset]);
}
/* Process Srq
*/
switch( srqnum ){
case BS_CLOSE:
/* args: file descriptor */
if ( arg[0] > 2 ){
retcode = close( arg[0] );
} else {
retcode = 0;
}
break;
case BS_CREAT:
/* args: filename, mode */
ninStrGet( arg[0], buf );
retcode = creat(buf,arg[1]);
break;
case BS_OPEN:
/* args: filename, flags, mode */
ninStrGet( arg[0], buf );
retcode = open(buf,arg[1],arg[2]);
break;
case BS_READ:
/* args: file descriptor, buffer, count */
retcode = read(arg[0],buf,arg[2]);
if ( retcode > 0 ){
ninMemPut( arg[1], buf, retcode );
}
break;
case BS_SEEK:
/* args: file descriptor, offset, whence */
retcode = lseek(arg[0],arg[1],arg[2]);
break;
case BS_WRITE:
/* args: file descriptor, buffer, count */
ninMemGet( arg[1], buf, arg[2] );
retcode = write(arg[0],buf,arg[2]);
break;
default:
retcode = ERROR;
break;
}
/* Send request termination status to NINDY
*/
buf[0] = 'e';
put_int( &buf[1], retcode );
send( buf, 5, NULL );
}
/******************************************************************************
* ninStopWhy:
* Assume the application program has stopped (i.e., a DLE was received
* from NINDY). Ask NINDY for status information describing the
* reason for the halt.
*
* Returns a non-zero value if the user program has exited, 0 otherwise.
* Also returns the following information, through passed pointers:
* - why: an exit code if program the exited; otherwise the reason
* why the program halted (see stop.h for values).
* - contents of register ip (little-endian byte order)
* - contents of register sp (little-endian byte order)
* - contents of register fp (little-endian byte order)
******************************************************************************/
char
ninStopWhy( whyp, ipp, fpp, spp )
unsigned char *whyp; /* Return the 'why' code through this pointer */
long *ipp; /* Return contents of register ip through this pointer */
long *fpp; /* Return contents of register fp through this pointer */
long *spp; /* Return contents of register sp through this pointer */
{
unsigned char buf[30];
extern char OninStopWhy ();
if ( old_nindy ){
return OninStopWhy( whyp, ipp, fpp, spp );
}
send((unsigned char *) "?", 1, buf );
*whyp = buf[1];
bcopy (&buf[2], (char *)ipp, sizeof (*ipp));
bcopy (&buf[6], (char *)fpp, sizeof (*ipp));
bcopy (&buf[10], (char *)spp, sizeof (*ipp));
return buf[0];
}
/******************************************************************************
* ninStrGet:
* Read a '\0'-terminated string of data out of the 960 memory space.
*
******************************************************************************/
static
ninStrGet( ninaddr, hostaddr )
unsigned long ninaddr; /* Address of string in NINDY memory space */
unsigned char *hostaddr; /* Address of the buffer to which string should
* be copied.
*/
{
unsigned char cmd[5];
cmd[0] = '"';
put_int( &cmd[1], ninaddr );
send( cmd, 5, hostaddr );
}
/******************************************************************************
* ninVersion:
* Ask NINDY for version information about itself.
* The information is sent as an ascii string in the form "x.xx,<arch>",
* where,
* x.xx is the version number
* <arch> is the processor architecture: "KA", "KB", "MC", "CA" *
*
******************************************************************************/
int
ninVersion( p )
unsigned char *p; /* Where to place version string */
{
if ( old_nindy ){
return OninVersion( p );
}
send((unsigned char *) "v", 1, p );
return strlen(p);
}