1155 lines
31 KiB
C
1155 lines
31 KiB
C
/* This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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||
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This started out life as code shared between the nindy monitor and
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GDB. For various reasons, this is no longer true. Eventually, it
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probably should be merged into remote-nindy.c. */
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/******************************************************************************
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*
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* NINDY INTERFACE ROUTINES
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*
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* The caller of these routines should be aware that:
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*
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* (1) ninConnect() should be called to open communications with the
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* remote NINDY board before any of the other routines are invoked.
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*
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* (2) almost all interactions are driven by the host: nindy sends information
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* in response to host commands.
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*
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* (3) the lone exception to (2) is the single character DLE (^P, 0x10).
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* Receipt of a DLE from NINDY indicates that the application program
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* running under NINDY has stopped execution and that NINDY is now
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* available to talk to the host (all other communication received after
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* the application has been started should be presumed to come from the
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* application and should be passed on by the host to stdout).
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*
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* (4) the reason the application program stopped can be determined with the
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* ninStopWhy() function. There are three classes of stop reasons:
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*
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* (a) the application has terminated execution.
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* The host should take appropriate action.
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*
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* (b) the application had a fault or trace event.
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* The host should take appropriate action.
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*
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* (c) the application wishes to make a service request (srq) of the host;
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* e.g., to open/close a file, read/write a file, etc. The ninSrq()
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* function should be called to determine the nature of the request
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* and process it.
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*/
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#include <stdio.h>
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#include "defs.h"
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#include "serial.h"
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#ifdef ANSI_PROTOTYPES
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY)
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#define HAVE_SGTTY
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#endif
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#ifdef HAVE_SGTTY
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#include <sys/ioctl.h>
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#endif
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#include <sys/types.h> /* Needed by file.h on Sys V */
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#include <sys/file.h>
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#include <signal.h>
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#include <sys/stat.h>
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#if 0
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#include "ttycntl.h"
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#endif
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#include "block_io.h"
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#include "gdb_wait.h"
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#include "env.h"
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#define DLE 0x10 /* ^P */
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#define XON 0x11 /* ^Q */
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#define XOFF 0x13 /* ^S */
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#define ESC 0x1b
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#define TIMEOUT -1
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int quiet = 0; /* 1 => stifle unnecessary messages */
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struct serial *nindy_serial;
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static int old_nindy = 0; /* 1 => use old (hex) communication protocol */
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static ninStrGet();
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/****************************
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* *
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* MISCELLANEOUS UTILTIES *
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* *
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****************************/
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/******************************************************************************
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* say:
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* This is a printf that takes at most two arguments (in addition to the
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* format string) and that outputs nothing if verbose output has been
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* suppressed.
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*****************************************************************************/
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/* VARARGS */
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static void
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#ifdef ANSI_PROTOTYPES
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say (char *fmt, ...)
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#else
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say (va_alist)
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va_dcl
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#endif
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{
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va_list args;
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#ifdef ANSI_PROTOTYPES
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va_start(args, fmt);
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#else
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char *fmt;
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va_start (args);
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fmt = va_arg (args, char *);
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#endif
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if (!quiet)
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{
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vfprintf_unfiltered (gdb_stdout, fmt, args);
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gdb_flush (gdb_stdout);
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}
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va_end (args);
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}
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/******************************************************************************
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* exists:
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* Creates a full pathname by concatenating up to three name components
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* onto a specified base name; optionally looks up the base name as a
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* runtime environment variable; and checks to see if the file or
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* directory specified by the pathname actually exists.
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*
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* Returns: the full pathname if it exists, NULL otherwise.
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* (returned pathname is in malloc'd memory and must be freed
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* by caller).
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*****************************************************************************/
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static char *
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exists( base, c1, c2, c3, env )
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char *base; /* Base directory of path */
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char *c1, *c2, *c3; /* Components (subdirectories and/or file name) to be
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* appended onto the base directory name. One or
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* more may be omitted by passing NULL pointers.
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*/
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int env; /* If 1, '*base' is the name of an environment variable
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* to be examined for the base directory name;
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* otherwise, '*base' is the actual name of the
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* base directory.
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*/
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{
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struct stat buf;/* For call to 'stat' -- never examined */
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char *path; /* Pointer to full pathname (malloc'd memory) */
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int len; /* Length of full pathname (incl. terminator) */
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extern char *getenv();
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if ( env ){
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base = getenv( base );
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if ( base == NULL ){
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return NULL;
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}
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}
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len = strlen(base) + 4;
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/* +4 for terminator and "/" before each component */
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if ( c1 != NULL ){
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len += strlen(c1);
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}
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if ( c2 != NULL ){
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len += strlen(c2);
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}
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if ( c3 != NULL ){
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len += strlen(c3);
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}
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path = xmalloc (len);
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strcpy( path, base );
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if ( c1 != NULL ){
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strcat( path, "/" );
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strcat( path, c1 );
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if ( c2 != NULL ){
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strcat( path, "/" );
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strcat( path, c2 );
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if ( c3 != NULL ){
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strcat( path, "/" );
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strcat( path, c3 );
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}
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}
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}
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if ( stat(path,&buf) != 0 ){
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free( path );
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path = NULL;
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}
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return path;
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}
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/*****************************
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* *
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* LOW-LEVEL COMMUNICATION *
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* *
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*****************************/
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/* Read *exactly* N characters from the NINDY tty, and put them in
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*BUF. Translate escape sequences into single characters, counting
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each such sequence as 1 character.
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An escape sequence consists of ESC and a following character. The
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ESC is discarded and the other character gets bit 0x40 cleared --
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thus ESC P == ^P, ESC S == ^S, ESC [ == ESC, etc.
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Return 1 if successful, 0 if more than TIMEOUT seconds pass without
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any input. */
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static int
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rdnin (buf,n,timeout)
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unsigned char * buf; /* Where to place characters read */
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int n; /* Number of characters to read */
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int timeout; /* Timeout, in seconds */
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{
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int escape_seen; /* 1 => last character of a read was an ESC */
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int c;
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escape_seen = 0;
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while (n)
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{
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c = serial_readchar (nindy_serial, timeout);
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switch (c)
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{
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case SERIAL_ERROR:
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case SERIAL_TIMEOUT:
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case SERIAL_EOF:
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return 0;
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case ESC:
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escape_seen = 1;
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break;
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default:
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if (escape_seen)
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{
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escape_seen = 0;
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c &= ~0x40;
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}
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*buf++ = c;
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--n;
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break;
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}
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}
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return 1;
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}
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/******************************************************************************
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* getpkt:
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* Read a packet from a remote NINDY, with error checking, into the
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* indicated buffer.
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*
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* Return packet status byte on success, TIMEOUT on failure.
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******************************************************************************/
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static
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int
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getpkt(buf)
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unsigned char *buf;
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{
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int i;
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unsigned char hdr[3]; /* Packet header:
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* hdr[0] = low byte of message length
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* hdr[1] = high byte of message length
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* hdr[2] = message status
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*/
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int cnt; /* Message length (status byte + data) */
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unsigned char cs_calc; /* Checksum calculated */
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unsigned char cs_recv; /* Checksum received */
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static char errfmt[] =
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"Bad checksum (recv=0x%02x; calc=0x%02x); retrying\r\n";
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while (1){
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if ( !rdnin(hdr,3,5) ){
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return TIMEOUT;
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}
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cnt = (hdr[1]<<8) + hdr[0] - 1;
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/* -1 for status byte (already read) */
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/* Caller's buffer may only be big enough for message body,
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* without status byte and checksum, so make sure to read
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* checksum into a separate buffer.
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*/
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if ( !rdnin(buf,cnt,5) || !rdnin(&cs_recv,1,5) ){
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return TIMEOUT;
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}
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/* Calculate checksum
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*/
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cs_calc = hdr[0] + hdr[1] + hdr[2];
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for ( i = 0; i < cnt; i++ ){
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cs_calc += buf[i];
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}
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if ( cs_calc == cs_recv ){
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serial_write (nindy_serial, "+", 1);
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return hdr[2];
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}
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/* Bad checksum: report, send NAK, and re-receive
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*/
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fprintf(stderr, errfmt, cs_recv, cs_calc );
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serial_write (nindy_serial, "-", 1);
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}
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}
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/******************************************************************************
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* putpkt:
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* Send a packet to NINDY, checksumming it and converting special
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* characters to escape sequences.
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******************************************************************************/
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/* This macro puts the character 'c' into the buffer pointed at by 'p',
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* and increments the pointer. If 'c' is one of the 4 special characters
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* in the transmission protocol, it is converted into a 2-character
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* escape sequence.
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*/
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#define PUTBUF(c,p) \
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if ( c == DLE || c == ESC || c == XON || c == XOFF ){ \
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*p++ = ESC; \
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*p++ = c | 0x40; \
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} else { \
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*p++ = c; \
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}
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static
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putpkt( msg, len )
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unsigned char *msg; /* Command to be sent, without lead ^P (\020) or checksum */
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int len; /* Number of bytes in message */
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{
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static char *buf = NULL;/* Local buffer -- build packet here */
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static int maxbuf = 0; /* Current length of buffer */
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unsigned char ack; /* Response received from NINDY */
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unsigned char checksum; /* Packet checksum */
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char *p; /* Pointer into buffer */
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int lenhi, lenlo; /* High and low bytes of message length */
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int i;
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/* Make sure local buffer is big enough. Must include space for
|
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* packet length, message body, and checksum. And in the worst
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* case, each character would expand into a 2-character escape
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* sequence.
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*/
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if ( maxbuf < ((2*len)+10) ){
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if ( buf ){
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free( buf );
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}
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buf = xmalloc( maxbuf=((2*len)+10) );
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}
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/* Attention, NINDY!
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*/
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serial_write (nindy_serial, "\020", 1);
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lenlo = len & 0xff;
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lenhi = (len>>8) & 0xff;
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checksum = lenlo + lenhi;
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p = buf;
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PUTBUF( lenlo, p );
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PUTBUF( lenhi, p );
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for ( i=0; i<len; i++ ){
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PUTBUF( msg[i], p );
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checksum += msg[i];
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}
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PUTBUF( checksum, p );
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/* Send checksummed message over and over until we get a positive ack
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*/
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serial_write (nindy_serial, buf, p - buf);
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while (1){
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if ( !rdnin(&ack,1,5) ){
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/* timed out */
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fprintf(stderr,"ACK timed out; resending\r\n");
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/* Attention, NINDY! */
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serial_write (nindy_serial, "\020", 1);
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serial_write (nindy_serial, buf, p - buf);
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} else if ( ack == '+' ){
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return;
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} else if ( ack == '-' ){
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fprintf( stderr, "Remote NAK; resending\r\n" );
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serial_write (nindy_serial, buf, p - buf);
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} else {
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||
fprintf( stderr, "Bad ACK, ignored: <%c>\r\n", ack );
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||
}
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/******************************************************************************
|
||
* send:
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* Send a message to a remote NINDY. Check message status byte
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* for error responses. If no error, return NINDY reponse (if any).
|
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******************************************************************************/
|
||
static
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send( out, len, in )
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||
unsigned char *out; /* Message to be sent to NINDY */
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||
int len; /* Number of meaningful bytes in out buffer */
|
||
unsigned char *in; /* Where to put response received from NINDY */
|
||
{
|
||
char *fmt;
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||
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 */
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||
"Can't set requested baud rate", /* 9 */
|
||
};
|
||
# define NUMERRS ( sizeof(errmsg) / sizeof(errmsg[0]) )
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||
|
||
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);
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||
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 */
|