1001 lines
24 KiB
C
1001 lines
24 KiB
C
/* Remote debugging interface for AMD 29000 EBMON on IBM PC, for GDB.
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Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
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Contributed by Cygnus Support. Written by Jim Kingdon for Cygnus.
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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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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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* This is like remote.c but is for an esoteric situation--
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having a 29k board in a PC hooked up to a unix machine with
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a serial line, and running ctty com1 on the PC, through which
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the unix machine can run ebmon. Not to mention that the PC
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has PC/NFS, so it can access the same executables that gdb can,
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over the net in real time. */
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#define TM_FILE_OVERRIDE
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#include "defs.h"
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#include <string.h>
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#include "tm-29k.h"
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#include "inferior.h"
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#include "wait.h"
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#include "value.h"
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#include <ctype.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <errno.h>
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#include "terminal.h"
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#include "target.h"
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#include "gdbcore.h"
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extern struct target_ops eb_ops; /* Forward declaration */
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static void eb_close();
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#define LOG_FILE "eb.log"
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#if defined (LOG_FILE)
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FILE *log_file;
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#endif
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static int timeout = 24;
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/* Descriptor for I/O to remote machine. Initialize it to -1 so that
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eb_open knows that we don't have a file open when the program
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starts. */
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int eb_desc = -1;
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/* stream which is fdopen'd from eb_desc. Only valid when
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eb_desc != -1. */
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FILE *eb_stream;
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/* Read a character from the remote system, doing all the fancy
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timeout stuff. */
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static int
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readchar ()
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{
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char buf;
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buf = '\0';
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#ifdef HAVE_TERMIO
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/* termio does the timeout for us. */
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read (eb_desc, &buf, 1);
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#else
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alarm (timeout);
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if (read (eb_desc, &buf, 1) < 0)
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{
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if (errno == EINTR)
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error ("Timeout reading from remote system.");
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else
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perror_with_name ("remote");
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}
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alarm (0);
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#endif
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if (buf == '\0')
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error ("Timeout reading from remote system.");
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#if defined (LOG_FILE)
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putc (buf & 0x7f, log_file);
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#endif
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return buf & 0x7f;
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}
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/* Keep discarding input from the remote system, until STRING is found.
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Let the user break out immediately. */
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static void
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expect (string)
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char *string;
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{
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char *p = string;
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immediate_quit = 1;
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while (1)
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{
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if (readchar() == *p)
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{
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p++;
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if (*p == '\0')
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{
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immediate_quit = 0;
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return;
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}
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}
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else
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p = string;
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}
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}
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/* Keep discarding input until we see the ebmon prompt.
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The convention for dealing with the prompt is that you
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o give your command
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o *then* wait for the prompt.
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Thus the last thing that a procedure does with the serial line
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will be an expect_prompt(). Exception: eb_resume does not
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wait for the prompt, because the terminal is being handed over
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to the inferior. However, the next thing which happens after that
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is a eb_wait which does wait for the prompt.
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Note that this includes abnormal exit, e.g. error(). This is
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necessary to prevent getting into states from which we can't
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recover. */
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static void
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expect_prompt ()
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{
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#if defined (LOG_FILE)
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/* This is a convenient place to do this. The idea is to do it often
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enough that we never lose much data if we terminate abnormally. */
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fflush (log_file);
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#endif
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expect ("\n# ");
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}
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/* Get a hex digit from the remote system & return its value.
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If ignore_space is nonzero, ignore spaces (not newline, tab, etc). */
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static int
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get_hex_digit (ignore_space)
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int ignore_space;
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{
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int ch;
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while (1)
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{
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ch = readchar ();
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if (ch >= '0' && ch <= '9')
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return ch - '0';
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else if (ch >= 'A' && ch <= 'F')
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return ch - 'A' + 10;
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else if (ch >= 'a' && ch <= 'f')
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return ch - 'a' + 10;
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else if (ch == ' ' && ignore_space)
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;
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else
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{
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expect_prompt ();
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error ("Invalid hex digit from remote system.");
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}
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}
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}
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/* Get a byte from eb_desc and put it in *BYT. Accept any number
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leading spaces. */
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static void
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get_hex_byte (byt)
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char *byt;
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{
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int val;
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val = get_hex_digit (1) << 4;
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val |= get_hex_digit (0);
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*byt = val;
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}
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/* Get N 32-bit words from remote, each preceded by a space,
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and put them in registers starting at REGNO. */
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static void
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get_hex_regs (n, regno)
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int n;
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int regno;
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{
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long val;
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int i;
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for (i = 0; i < n; i++)
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{
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int j;
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val = 0;
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for (j = 0; j < 8; j++)
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val = (val << 4) + get_hex_digit (j == 0);
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supply_register (regno++, &val);
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}
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}
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/* Called when SIGALRM signal sent due to alarm() timeout. */
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#ifndef HAVE_TERMIO
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#ifndef __STDC__
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#define volatile /**/
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#endif
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volatile int n_alarms;
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void
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eb_timer ()
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{
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#if 0
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if (kiodebug)
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printf ("eb_timer called\n");
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#endif
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n_alarms++;
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}
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#endif
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/* malloc'd name of the program on the remote system. */
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static char *prog_name = NULL;
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/* Nonzero if we have loaded the file ("yc") and not yet issued a "gi"
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command. "gi" is supposed to happen exactly once for each "yc". */
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static int need_gi = 0;
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/* Number of SIGTRAPs we need to simulate. That is, the next
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NEED_ARTIFICIAL_TRAP calls to eb_wait should just return
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SIGTRAP without actually waiting for anything. */
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static int need_artificial_trap = 0;
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/* This is called not only when we first attach, but also when the
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user types "run" after having attached. */
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static void
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eb_create_inferior (execfile, args, env)
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char *execfile;
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char *args;
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char **env;
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{
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int entry_pt;
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if (args && *args)
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error ("Can't pass arguments to remote EBMON process");
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if (execfile == 0 || exec_bfd == 0)
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error ("No exec file specified");
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entry_pt = (int) bfd_get_start_address (exec_bfd);
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#ifdef CREATE_INFERIOR_HOOK
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CREATE_INFERIOR_HOOK (0); /* No process-ID */
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#endif
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{
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/* OK, now read in the file. Y=read, C=COFF, D=no symbols
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0=start address, %s=filename. */
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fprintf (eb_stream, "YC D,0:%s", prog_name);
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if (args != NULL)
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fprintf(eb_stream, " %s", args);
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fprintf (eb_stream, "\n");
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fflush (eb_stream);
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expect_prompt ();
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need_gi = 1;
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}
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/* The "process" (board) is already stopped awaiting our commands, and
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the program is already downloaded. We just set its PC and go. */
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clear_proceed_status ();
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/* Tell wait_for_inferior that we've started a new process. */
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init_wait_for_inferior ();
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/* Set up the "saved terminal modes" of the inferior
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based on what modes we are starting it with. */
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target_terminal_init ();
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/* Install inferior's terminal modes. */
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target_terminal_inferior ();
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/* insert_step_breakpoint (); FIXME, do we need this? */
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proceed ((CORE_ADDR)entry_pt, -1, 0); /* Let 'er rip... */
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}
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/* Translate baud rates from integers to damn B_codes. Unix should
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have outgrown this crap years ago, but even POSIX wouldn't buck it. */
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#ifndef B19200
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#define B19200 EXTA
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#endif
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#ifndef B38400
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#define B38400 EXTB
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#endif
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struct {int rate, damn_b;} baudtab[] = {
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{0, B0},
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{50, B50},
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{75, B75},
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{110, B110},
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{134, B134},
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{150, B150},
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{200, B200},
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{300, B300},
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{600, B600},
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{1200, B1200},
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{1800, B1800},
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{2400, B2400},
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{4800, B4800},
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{9600, B9600},
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{19200, B19200},
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{38400, B38400},
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{-1, -1},
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};
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int damn_b (rate)
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int rate;
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{
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int i;
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for (i = 0; baudtab[i].rate != -1; i++)
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if (rate == baudtab[i].rate) return baudtab[i].damn_b;
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return B38400; /* Random */
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}
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/* Open a connection to a remote debugger.
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NAME is the filename used for communication, then a space,
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then the name of the program as we should name it to EBMON. */
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static int baudrate = 9600;
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static char *dev_name;
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void
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eb_open (name, from_tty)
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char *name;
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int from_tty;
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{
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TERMINAL sg;
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char *p;
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target_preopen (from_tty);
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/* Find the first whitespace character, it separates dev_name from
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prog_name. */
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if (name == 0)
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goto erroid;
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for (p = name;
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*p != '\0' && !isspace (*p); p++)
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;
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if (*p == '\0')
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erroid:
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error ("\
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Please include the name of the device for the serial port,\n\
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the baud rate, and the name of the program to run on the remote system.");
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dev_name = alloca (p - name + 1);
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strncpy (dev_name, name, p - name);
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dev_name[p - name] = '\0';
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/* Skip over the whitespace after dev_name */
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for (; isspace (*p); p++)
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/*EMPTY*/;
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if (1 != sscanf (p, "%d ", &baudrate))
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goto erroid;
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/* Skip the number and then the spaces */
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for (; isdigit (*p); p++)
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/*EMPTY*/;
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for (; isspace (*p); p++)
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/*EMPTY*/;
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if (prog_name != NULL)
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free (prog_name);
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prog_name = savestring (p, strlen (p));
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eb_close (0);
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eb_desc = open (dev_name, O_RDWR);
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if (eb_desc < 0)
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perror_with_name (dev_name);
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ioctl (eb_desc, TIOCGETP, &sg);
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#ifdef HAVE_TERMIO
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sg.c_cc[VMIN] = 0; /* read with timeout. */
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sg.c_cc[VTIME] = timeout * 10;
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sg.c_lflag &= ~(ICANON | ECHO);
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sg.c_cflag = (sg.c_cflag & ~CBAUD) | damn_b (baudrate);
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#else
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sg.sg_ispeed = damn_b (baudrate);
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sg.sg_ospeed = damn_b (baudrate);
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sg.sg_flags |= RAW | ANYP;
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sg.sg_flags &= ~ECHO;
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#endif
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ioctl (eb_desc, TIOCSETP, &sg);
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eb_stream = fdopen (eb_desc, "r+");
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push_target (&eb_ops);
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if (from_tty)
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printf ("Remote %s debugging %s using %s\n", target_shortname,
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prog_name, dev_name);
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#ifndef HAVE_TERMIO
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#ifndef NO_SIGINTERRUPT
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/* Cause SIGALRM's to make reads fail with EINTR instead of resuming
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the read. */
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if (siginterrupt (SIGALRM, 1) != 0)
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perror ("eb_open: error in siginterrupt");
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#endif
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/* Set up read timeout timer. */
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if ((void (*)) signal (SIGALRM, eb_timer) == (void (*)) -1)
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perror ("eb_open: error in signal");
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#endif
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#if defined (LOG_FILE)
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log_file = fopen (LOG_FILE, "w");
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if (log_file == NULL)
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perror_with_name (LOG_FILE);
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#endif
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/* Hello? Are you there? */
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write (eb_desc, "\n", 1);
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expect_prompt ();
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}
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/* Close out all files and local state before this target loses control. */
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static void
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eb_close (quitting)
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int quitting;
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{
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/* Due to a bug in Unix, fclose closes not only the stdio stream,
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but also the file descriptor. So we don't actually close
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eb_desc. */
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if (eb_stream)
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fclose (eb_stream); /* This also closes eb_desc */
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if (eb_desc >= 0)
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/* close (eb_desc); */
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/* Do not try to close eb_desc again, later in the program. */
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eb_stream = NULL;
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eb_desc = -1;
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#if defined (LOG_FILE)
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if (log_file) {
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if (ferror (log_file))
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printf ("Error writing log file.\n");
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if (fclose (log_file) != 0)
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printf ("Error closing log file.\n");
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}
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#endif
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}
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/* Terminate the open connection to the remote debugger.
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Use this when you want to detach and do something else
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with your gdb. */
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void
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eb_detach (from_tty)
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int from_tty;
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{
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pop_target(); /* calls eb_close to do the real work */
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if (from_tty)
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printf ("Ending remote %s debugging\n", target_shortname);
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}
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/* Tell the remote machine to resume. */
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void
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eb_resume (step, sig)
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int step, sig;
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{
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if (step)
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{
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write (eb_desc, "t 1,s\n", 6);
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/* Wait for the echo. */
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expect ("t 1,s\r");
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/* Then comes a line containing the instruction we stepped to. */
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expect ("\n@");
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/* Then we get the prompt. */
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expect_prompt ();
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/* Force the next eb_wait to return a trap. Not doing anything
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about I/O from the target means that the user has to type
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"continue" to see any. This should be fixed. */
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need_artificial_trap = 1;
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}
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else
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{
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if (need_gi)
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{
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need_gi = 0;
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write (eb_desc, "gi\n", 3);
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/* Swallow the echo of "gi". */
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expect ("gi\r");
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}
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else
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{
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write (eb_desc, "GR\n", 3);
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/* Swallow the echo. */
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expect ("GR\r");
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}
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}
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}
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/* Wait until the remote machine stops, then return,
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storing status in STATUS just as `wait' would. */
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int
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eb_wait (status)
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WAITTYPE *status;
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{
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/* Strings to look for. '?' means match any single character.
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Note that with the algorithm we use, the initial character
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of the string cannot recur in the string, or we will not
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find some cases of the string in the input. */
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static char bpt[] = "Invalid interrupt taken - #0x50 - ";
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/* It would be tempting to look for "\n[__exit + 0x8]\n"
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but that requires loading symbols with "yc i" and even if
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we did do that we don't know that the file has symbols. */
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static char exitmsg[] = "\n@????????I JMPTI GR121,LR0";
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char *bp = bpt;
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char *ep = exitmsg;
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/* Large enough for either sizeof (bpt) or sizeof (exitmsg) chars. */
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char swallowed[50];
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/* Current position in swallowed. */
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char *swallowed_p = swallowed;
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int ch;
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int ch_handled;
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int old_timeout = timeout;
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WSETEXIT ((*status), 0);
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if (need_artificial_trap != 0)
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{
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WSETSTOP ((*status), SIGTRAP);
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need_artificial_trap--;
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return 0;
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}
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timeout = 0; /* Don't time out -- user program is running. */
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while (1)
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{
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ch_handled = 0;
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ch = readchar ();
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if (ch == *bp)
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{
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bp++;
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if (*bp == '\0')
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break;
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ch_handled = 1;
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|
*swallowed_p++ = ch;
|
|
}
|
|
else
|
|
bp = bpt;
|
|
|
|
if (ch == *ep || *ep == '?')
|
|
{
|
|
ep++;
|
|
if (*ep == '\0')
|
|
break;
|
|
|
|
if (!ch_handled)
|
|
*swallowed_p++ = ch;
|
|
ch_handled = 1;
|
|
}
|
|
else
|
|
ep = exitmsg;
|
|
|
|
if (!ch_handled)
|
|
{
|
|
char *p;
|
|
|
|
/* Print out any characters which have been swallowed. */
|
|
for (p = swallowed; p < swallowed_p; ++p)
|
|
putc (*p, stdout);
|
|
swallowed_p = swallowed;
|
|
|
|
putc (ch, stdout);
|
|
}
|
|
}
|
|
expect_prompt ();
|
|
if (*bp== '\0')
|
|
WSETSTOP ((*status), SIGTRAP);
|
|
else
|
|
WSETEXIT ((*status), 0);
|
|
timeout = old_timeout;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Return the name of register number REGNO
|
|
in the form input and output by EBMON.
|
|
|
|
Returns a pointer to a static buffer containing the answer. */
|
|
static char *
|
|
get_reg_name (regno)
|
|
int regno;
|
|
{
|
|
static char buf[80];
|
|
if (regno >= GR96_REGNUM && regno < GR96_REGNUM + 32)
|
|
sprintf (buf, "GR%03d", regno - GR96_REGNUM + 96);
|
|
else if (regno >= LR0_REGNUM && regno < LR0_REGNUM + 128)
|
|
sprintf (buf, "LR%03d", regno - LR0_REGNUM);
|
|
else if (regno == Q_REGNUM)
|
|
strcpy (buf, "SR131");
|
|
else if (regno >= BP_REGNUM && regno <= CR_REGNUM)
|
|
sprintf (buf, "SR%03d", regno - BP_REGNUM + 133);
|
|
else if (regno == ALU_REGNUM)
|
|
strcpy (buf, "SR132");
|
|
else if (regno >= IPC_REGNUM && regno <= IPB_REGNUM)
|
|
sprintf (buf, "SR%03d", regno - IPC_REGNUM + 128);
|
|
else if (regno >= VAB_REGNUM && regno <= LRU_REGNUM)
|
|
sprintf (buf, "SR%03d", regno - VAB_REGNUM);
|
|
else if (regno == GR1_REGNUM)
|
|
strcpy (buf, "GR001");
|
|
return buf;
|
|
}
|
|
|
|
/* Read the remote registers into the block REGS. */
|
|
|
|
static void
|
|
eb_fetch_registers ()
|
|
{
|
|
int reg_index;
|
|
int regnum_index;
|
|
char tempbuf[10];
|
|
int i;
|
|
|
|
#if 0
|
|
/* This should not be necessary, because one is supposed to read the
|
|
registers only when the inferior is stopped (at least with
|
|
ptrace() and why not make it the same for remote?). */
|
|
/* ^A is the "normal character" used to make sure we are talking to EBMON
|
|
and not to the program being debugged. */
|
|
write (eb_desc, "\001\n");
|
|
expect_prompt ();
|
|
#endif
|
|
|
|
write (eb_desc, "dw gr96,gr127\n", 14);
|
|
for (reg_index = 96, regnum_index = GR96_REGNUM;
|
|
reg_index < 128;
|
|
reg_index += 4, regnum_index += 4)
|
|
{
|
|
sprintf (tempbuf, "GR%03d ", reg_index);
|
|
expect (tempbuf);
|
|
get_hex_regs (4, regnum_index);
|
|
expect ("\n");
|
|
}
|
|
|
|
for (i = 0; i < 128; i += 32)
|
|
{
|
|
/* The PC has a tendency to hang if we get these
|
|
all in one fell swoop ("dw lr0,lr127"). */
|
|
sprintf (tempbuf, "dw lr%d\n", i);
|
|
write (eb_desc, tempbuf, strlen (tempbuf));
|
|
for (reg_index = i, regnum_index = LR0_REGNUM + i;
|
|
reg_index < i + 32;
|
|
reg_index += 4, regnum_index += 4)
|
|
{
|
|
sprintf (tempbuf, "LR%03d ", reg_index);
|
|
expect (tempbuf);
|
|
get_hex_regs (4, regnum_index);
|
|
expect ("\n");
|
|
}
|
|
}
|
|
|
|
write (eb_desc, "dw sr133,sr133\n", 15);
|
|
expect ("SR133 ");
|
|
get_hex_regs (1, BP_REGNUM);
|
|
expect ("\n");
|
|
|
|
write (eb_desc, "dw sr134,sr134\n", 15);
|
|
expect ("SR134 ");
|
|
get_hex_regs (1, FC_REGNUM);
|
|
expect ("\n");
|
|
|
|
write (eb_desc, "dw sr135,sr135\n", 15);
|
|
expect ("SR135 ");
|
|
get_hex_regs (1, CR_REGNUM);
|
|
expect ("\n");
|
|
|
|
write (eb_desc, "dw sr131,sr131\n", 15);
|
|
expect ("SR131 ");
|
|
get_hex_regs (1, Q_REGNUM);
|
|
expect ("\n");
|
|
|
|
write (eb_desc, "dw sr0,sr14\n", 12);
|
|
for (reg_index = 0, regnum_index = VAB_REGNUM;
|
|
regnum_index <= LRU_REGNUM;
|
|
regnum_index += 4, reg_index += 4)
|
|
{
|
|
sprintf (tempbuf, "SR%03d ", reg_index);
|
|
expect (tempbuf);
|
|
get_hex_regs (reg_index == 12 ? 3 : 4, regnum_index);
|
|
expect ("\n");
|
|
}
|
|
|
|
/* There doesn't seem to be any way to get these. */
|
|
{
|
|
int val = -1;
|
|
supply_register (FPE_REGNUM, &val);
|
|
supply_register (INTE_REGNUM, &val);
|
|
supply_register (FPS_REGNUM, &val);
|
|
supply_register (EXO_REGNUM, &val);
|
|
}
|
|
|
|
write (eb_desc, "dw gr1,gr1\n", 11);
|
|
expect ("GR001 ");
|
|
get_hex_regs (1, GR1_REGNUM);
|
|
expect_prompt ();
|
|
}
|
|
|
|
/* Fetch register REGNO, or all registers if REGNO is -1.
|
|
Returns errno value. */
|
|
void
|
|
eb_fetch_register (regno)
|
|
int regno;
|
|
{
|
|
if (regno == -1)
|
|
eb_fetch_registers ();
|
|
else
|
|
{
|
|
char *name = get_reg_name (regno);
|
|
fprintf (eb_stream, "dw %s,%s\n", name, name);
|
|
expect (name);
|
|
expect (" ");
|
|
get_hex_regs (1, regno);
|
|
expect_prompt ();
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Store the remote registers from the contents of the block REGS. */
|
|
|
|
static void
|
|
eb_store_registers ()
|
|
{
|
|
int i, j;
|
|
fprintf (eb_stream, "s gr1,%x\n", read_register (GR1_REGNUM));
|
|
expect_prompt ();
|
|
|
|
for (j = 0; j < 32; j += 16)
|
|
{
|
|
fprintf (eb_stream, "s gr%d,", j + 96);
|
|
for (i = 0; i < 15; ++i)
|
|
fprintf (eb_stream, "%x,", read_register (GR96_REGNUM + j + i));
|
|
fprintf (eb_stream, "%x\n", read_register (GR96_REGNUM + j + 15));
|
|
expect_prompt ();
|
|
}
|
|
|
|
for (j = 0; j < 128; j += 16)
|
|
{
|
|
fprintf (eb_stream, "s lr%d,", j);
|
|
for (i = 0; i < 15; ++i)
|
|
fprintf (eb_stream, "%x,", read_register (LR0_REGNUM + j + i));
|
|
fprintf (eb_stream, "%x\n", read_register (LR0_REGNUM + j + 15));
|
|
expect_prompt ();
|
|
}
|
|
|
|
fprintf (eb_stream, "s sr133,%x,%x,%x\n", read_register (BP_REGNUM),
|
|
read_register (FC_REGNUM), read_register (CR_REGNUM));
|
|
expect_prompt ();
|
|
fprintf (eb_stream, "s sr131,%x\n", read_register (Q_REGNUM));
|
|
expect_prompt ();
|
|
fprintf (eb_stream, "s sr0,");
|
|
for (i = 0; i < 11; ++i)
|
|
fprintf (eb_stream, "%x,", read_register (VAB_REGNUM + i));
|
|
fprintf (eb_stream, "%x\n", read_register (VAB_REGNUM + 11));
|
|
expect_prompt ();
|
|
}
|
|
|
|
/* Store register REGNO, or all if REGNO == 0.
|
|
Return errno value. */
|
|
void
|
|
eb_store_register (regno)
|
|
int regno;
|
|
{
|
|
if (regno == -1)
|
|
eb_store_registers ();
|
|
else
|
|
{
|
|
char *name = get_reg_name (regno);
|
|
fprintf (eb_stream, "s %s,%x\n", name, read_register (regno));
|
|
/* Setting GR1 changes the numbers of all the locals, so
|
|
invalidate the register cache. Do this *after* calling
|
|
read_register, because we want read_register to return the
|
|
value that write_register has just stuffed into the registers
|
|
array, not the value of the register fetched from the
|
|
inferior. */
|
|
if (regno == GR1_REGNUM)
|
|
registers_changed ();
|
|
expect_prompt ();
|
|
}
|
|
}
|
|
|
|
/* Get ready to modify the registers array. On machines which store
|
|
individual registers, this doesn't need to do anything. On machines
|
|
which store all the registers in one fell swoop, this makes sure
|
|
that registers contains all the registers from the program being
|
|
debugged. */
|
|
|
|
void
|
|
eb_prepare_to_store ()
|
|
{
|
|
/* Do nothing, since we can store individual regs */
|
|
}
|
|
|
|
|
|
/* FIXME-someday! Merge these two. */
|
|
int
|
|
eb_xfer_inferior_memory (memaddr, myaddr, len, write, target)
|
|
CORE_ADDR memaddr;
|
|
char *myaddr;
|
|
int len;
|
|
int write;
|
|
struct target_ops *target; /* ignored */
|
|
{
|
|
if (write)
|
|
return eb_write_inferior_memory (memaddr, myaddr, len);
|
|
else
|
|
return eb_read_inferior_memory (memaddr, myaddr, len);
|
|
}
|
|
|
|
void
|
|
eb_files_info ()
|
|
{
|
|
printf ("\tAttached to %s at %d baud and running program %s.\n",
|
|
dev_name, baudrate, prog_name);
|
|
}
|
|
|
|
/* Copy LEN bytes of data from debugger memory at MYADDR
|
|
to inferior's memory at MEMADDR. Returns length moved. */
|
|
int
|
|
eb_write_inferior_memory (memaddr, myaddr, len)
|
|
CORE_ADDR memaddr;
|
|
char *myaddr;
|
|
int len;
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
if ((i % 16) == 0)
|
|
fprintf (eb_stream, "sb %x,", memaddr + i);
|
|
if ((i % 16) == 15 || i == len - 1)
|
|
{
|
|
fprintf (eb_stream, "%x\n", ((unsigned char *)myaddr)[i]);
|
|
expect_prompt ();
|
|
}
|
|
else
|
|
fprintf (eb_stream, "%x,", ((unsigned char *)myaddr)[i]);
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/* Read LEN bytes from inferior memory at MEMADDR. Put the result
|
|
at debugger address MYADDR. Returns length moved. */
|
|
int
|
|
eb_read_inferior_memory(memaddr, myaddr, len)
|
|
CORE_ADDR memaddr;
|
|
char *myaddr;
|
|
int len;
|
|
{
|
|
int i;
|
|
|
|
/* Number of bytes read so far. */
|
|
int count;
|
|
|
|
/* Starting address of this pass. */
|
|
unsigned long startaddr;
|
|
|
|
/* Number of bytes to read in this pass. */
|
|
int len_this_pass;
|
|
|
|
/* Note that this code works correctly if startaddr is just less
|
|
than UINT_MAX (well, really CORE_ADDR_MAX if there was such a
|
|
thing). That is, something like
|
|
eb_read_bytes (CORE_ADDR_MAX - 4, foo, 4)
|
|
works--it never adds len to memaddr and gets 0. */
|
|
/* However, something like
|
|
eb_read_bytes (CORE_ADDR_MAX - 3, foo, 4)
|
|
doesn't need to work. Detect it and give up if there's an attempt
|
|
to do that. */
|
|
if (((memaddr - 1) + len) < memaddr) {
|
|
errno = EIO;
|
|
return 0;
|
|
}
|
|
|
|
startaddr = memaddr;
|
|
count = 0;
|
|
while (count < len)
|
|
{
|
|
len_this_pass = 16;
|
|
if ((startaddr % 16) != 0)
|
|
len_this_pass -= startaddr % 16;
|
|
if (len_this_pass > (len - count))
|
|
len_this_pass = (len - count);
|
|
|
|
fprintf (eb_stream, "db %x,%x\n", startaddr,
|
|
(startaddr - 1) + len_this_pass);
|
|
expect ("\n");
|
|
|
|
/* Look for 8 hex digits. */
|
|
i = 0;
|
|
while (1)
|
|
{
|
|
if (isxdigit (readchar ()))
|
|
++i;
|
|
else
|
|
{
|
|
expect_prompt ();
|
|
error ("Hex digit expected from remote system.");
|
|
}
|
|
if (i >= 8)
|
|
break;
|
|
}
|
|
|
|
expect (" ");
|
|
|
|
for (i = 0; i < len_this_pass; i++)
|
|
get_hex_byte (&myaddr[count++]);
|
|
|
|
expect_prompt ();
|
|
|
|
startaddr += len_this_pass;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static void
|
|
eb_kill (args, from_tty)
|
|
char *args;
|
|
int from_tty;
|
|
{
|
|
return; /* Ignore attempts to kill target system */
|
|
}
|
|
|
|
/* Clean up when a program exits.
|
|
|
|
The program actually lives on in the remote processor's RAM, and may be
|
|
run again without a download. Don't leave it full of breakpoint
|
|
instructions. */
|
|
|
|
void
|
|
eb_mourn_inferior ()
|
|
{
|
|
remove_breakpoints ();
|
|
generic_mourn_inferior (); /* Do all the proper things now */
|
|
}
|
|
/* Define the target subroutine names */
|
|
|
|
struct target_ops eb_ops = {
|
|
"amd-eb", "Remote serial AMD EBMON target",
|
|
"Use a remote computer running EBMON connected by a serial line.\n\
|
|
Arguments are the name of the device for the serial line,\n\
|
|
the speed to connect at in bits per second, and the filename of the\n\
|
|
executable as it exists on the remote computer. For example,\n\
|
|
target amd-eb /dev/ttya 9600 demo",
|
|
eb_open, eb_close,
|
|
0, eb_detach, eb_resume, eb_wait,
|
|
eb_fetch_register, eb_store_register,
|
|
eb_prepare_to_store, 0, 0, /* conv_to, conv_from */
|
|
eb_xfer_inferior_memory, eb_files_info,
|
|
0, 0, /* Breakpoints */
|
|
0, 0, 0, 0, 0, /* Terminal handling */
|
|
eb_kill,
|
|
0, /* load */
|
|
0, /* lookup_symbol */
|
|
eb_create_inferior,
|
|
eb_mourn_inferior,
|
|
process_stratum, 0, /* next */
|
|
1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */
|
|
0, 0, /* Section pointers */
|
|
OPS_MAGIC, /* Always the last thing */
|
|
};
|
|
|
|
void
|
|
_initialize_remote_eb ()
|
|
{
|
|
add_target (&eb_ops);
|
|
}
|