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NetBSD/gnu/dist/gdb/nindy-share/nindy.c

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stock gdb-4.16
1997-09-24 20:57:14 +04:00
/* This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This started out life as code shared between the nindy monitor and
GDB. For various reasons, this is no longer true. Eventually, it
probably should be merged into remote-nindy.c. */
/******************************************************************************
*
* NINDY INTERFACE ROUTINES
*
* 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.
*/
#include <stdio.h>
#include "defs.h"
#include "serial.h"
#ifdef ANSI_PROTOTYPES
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY)
#define HAVE_SGTTY
#endif
#ifdef HAVE_SGTTY
#include <sys/ioctl.h>
#endif
#include <sys/types.h> /* Needed by file.h on Sys V */
#include <sys/file.h>
#include <signal.h>
#include <sys/stat.h>
#if 0
#include "ttycntl.h"
#endif
#include "block_io.h"
#include "wait.h"
#include "env.h"
#define DLE 0x10 /* ^P */
#define XON 0x11 /* ^Q */
#define XOFF 0x13 /* ^S */
#define ESC 0x1b
#define TIMEOUT -1
int quiet = 0; /* 1 => stifle unnecessary messages */
serial_t nindy_serial;
static int old_nindy = 0; /* 1 => use old (hex) communication protocol */
static ninStrGet();
/****************************
* *
* MISCELLANEOUS UTILTIES *
* *
****************************/
/******************************************************************************
* 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.
*****************************************************************************/
/* VARARGS */
static void
#ifdef ANSI_PROTOTYPES
say (char *fmt, ...)
#else
say (va_alist)
va_dcl
#endif
{
va_list args;
#ifdef ANSI_PROTOTYPES
va_start(args, fmt);
#else
char *fmt;
va_start (args);
fmt = va_arg (args, char *);
#endif
if (!quiet)
{
vfprintf_unfiltered (gdb_stdout, fmt, args);
gdb_flush (gdb_stdout);
}
va_end (args);
}
/******************************************************************************
* 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 = xmalloc (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 *
* *
*****************************/
/* Read *exactly* N characters from the NINDY tty, and put them in
*BUF. 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 */
{
int escape_seen; /* 1 => last character of a read was an ESC */
int c;
escape_seen = 0;
while (n)
{
c = SERIAL_READCHAR (nindy_serial, timeout);
switch (c)
{
case SERIAL_ERROR:
case SERIAL_TIMEOUT:
case SERIAL_EOF:
return 0;
case ESC:
escape_seen = 1;
break;
default:
if (escape_seen)
{
escape_seen = 0;
c &= ~0x40;
}
*buf++ = c;
--n;
break;
}
}
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 ){
SERIAL_WRITE (nindy_serial, "+", 1);
return hdr[2];
}
/* Bad checksum: report, send NAK, and re-receive
*/
fprintf(stderr, errfmt, cs_recv, cs_calc );
SERIAL_WRITE (nindy_serial, "-", 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 = xmalloc( maxbuf=((2*len)+10) );
}
/* Attention, NINDY!
*/
SERIAL_WRITE (nindy_serial, "\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
*/
SERIAL_WRITE (nindy_serial, buf, p - buf);
while (1){
if ( !rdnin(&ack,1,5) ){
/* timed out */
fprintf(stderr,"ACK timed out; resending\r\n");
/* Attention, NINDY! */
SERIAL_WRITE (nindy_serial, "\020", 1);
SERIAL_WRITE (nindy_serial, buf, p - buf);
} else if ( ack == '+' ){
return;
} else if ( ack == '-' ){
fprintf( stderr, "Remote NAK; resending\r\n" );
SERIAL_WRITE (nindy_serial, 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", 1200,
"2400", 2400,
"4800", 4800,
"9600", 9600,
"19200", 19200,
"38400", 38400,
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 (serial, brp)
serial_t serial;
struct baudrate *brp;
{
unsigned char c;
/* Set specified baud rate and flush all pending input */
SERIAL_SETBAUDRATE (serial, brp->rate);
tty_flush (serial);
/* Send empty command with bad checksum, hope for NAK ('-') response */
SERIAL_WRITE (serial, "\020\0\0\001", 4);
/* Anything but a quick '-', including error, eof, or timeout, means that
this baudrate doesn't work. */
return SERIAL_READCHAR (serial, 1) == '-';
}
/******************************************************************************
* 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( serial, brp )
serial_t serial;
struct baudrate *brp;
{
int i;
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(serial, &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. */
SERIAL_SETBAUDRATE (serial, brp->rate);
}
/**********************************
* *
* 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];
tty_flush (nindy_serial);
if (old_nindy)
{
char *p; /* Pointer into buffer */
unsigned char csum; /* Calculated checksum */
/* Can't use putpkt() because after the baudrate change NINDY's
ack/nak will look like gibberish. */
for (p=baudrate, csum=020+'z'; *p; p++)
{
csum += *p;
}
sprintf (msg, "\020z%s#%02x", baudrate, csum);
SERIAL_WRITE (nindy_serial, msg, strlen (msg));
}
else
{
/* 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 {
store_unsigned_integer (&buf[2], 4, 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;
store_unsigned_integer (&buf[2], 4, 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;
}
quiet = silent; /* Make global to this file */
for ( i=0; prefix[i] != NULL; i++ ){
p = xmalloc(strlen(prefix[i]) + strlen(name) + 1 );
strcpy( p, prefix[i] );
strcat( p, name );
nindy_serial = SERIAL_OPEN (p);
if (nindy_serial != NULL) {
#ifdef TIOCEXCL
/* Exclusive use mode (hp9000 does not support it) */
ioctl(nindy_serial->fd,TIOCEXCL,NULL);
#endif
SERIAL_RAW (nindy_serial);
if (brk)
{
SERIAL_SEND_BREAK (nindy_serial);
}
brp = parse_baudrate( baudrate );
if ( brp == NULL ){
say("Illegal baudrate %s ignored; using 9600\n",
baudrate);
brp = parse_baudrate( "9600" );
}
if ( !try_baudrate(nindy_serial, brp) ){
autobaud(nindy_serial, brp);
}
tty_flush (nindy_serial);
say( "Connected to %s\n", p );
free(p);
break;
}
free(p);
}
return 0;
}
#if 0
/* Currently unused; shouldn't we be doing this on target_kill and
perhaps target_mourn? FIXME. */
/******************************************************************************
* ninGdbExit:
* Ask NINDY to leave GDB mode and print a NINDY prompt.
****************************************************************************/
ninGdbExit()
{
if ( old_nindy ){
OninGdbExit();
return;
}
putpkt((unsigned char *) "E", 1 );
}
#endif
/******************************************************************************
* 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';
store_unsigned_integer (&buf[1], 4, 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';
store_unsigned_integer (&buf[1], 4, ninaddr);
memcpy(buf + 5, hostaddr, 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 extract_unsigned_integer (inbuf, 4);
}
/******************************************************************************
* 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);
store_unsigned_integer (&buf[len], 4, 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 */
{
/* Number of bytes that we send to nindy. I believe this is defined by
the protocol (it does not agree with REGISTER_BYTES). */
#define NINDY_REGISTER_BYTES ((36*4) + (4*8))
unsigned char buf[NINDY_REGISTER_BYTES+10];
if ( old_nindy ){
OninRegsPut( regp );
return;
}
buf[0] = 'R';
memcpy(buf+1, regp, NINDY_REGISTER_BYTES );
send( buf, NINDY_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()
{
/* FIXME: Imposes arbitrary limits on lengths of pathnames and such. */
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] = extract_unsigned_integer (&buf[offset], 4);
}
/* 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 = -1;
break;
}
/* Send request termination status to NINDY
*/
buf[0] = 'e';
store_unsigned_integer (&buf[1], 4, 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];
memcpy ((char *)ipp, &buf[2], sizeof (*ipp));
memcpy ((char *)fpp, &buf[6], sizeof (*ipp));
memcpy ((char *)spp, &buf[10], 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] = '"';
store_unsigned_integer (&cmd[1], 4, ninaddr);
send( cmd, 5, hostaddr );
}
#if 0
/* Not used. */
/******************************************************************************
* 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);
}
#endif /* 0 */