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Diffstat (limited to 'gdb/nindy-share/nindy.c')
| -rw-r--r-- | gdb/nindy-share/nindy.c | 1154 |
1 files changed, 0 insertions, 1154 deletions
diff --git a/gdb/nindy-share/nindy.c b/gdb/nindy-share/nindy.c deleted file mode 100644 index 77dd734..0000000 --- a/gdb/nindy-share/nindy.c +++ /dev/null @@ -1,1154 +0,0 @@ -/* 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 "gdb_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 */ -struct serial *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) - struct serial *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 ) - struct serial *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). - ******************************************************************************/ -int -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 */ - int origlen = len; - - 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; - } - return origlen; -} - - -/****************************************************************************** - * ninMemPut: - * Write a string of bytes into NINDY's address space (960 memory). - ******************************************************************************/ -int -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 */ - int origlen = len; - - 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; - } - return origlen; -} - -/****************************************************************************** - * 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 */ |