rename for 14-char filenames
This commit is contained in:
Jim Kingdon
parent
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commit
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2262
gdb/remote-es1800.c
2262
gdb/remote-es1800.c
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/* Remote debugging interface for Tandem ST2000 phone switch, 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 file was derived from remote-eb.c, which did a similar job, but for
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an AMD-29K running EBMON. That file was in turn derived from remote.c
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as mentioned in the following comment (left in for comic relief):
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"This is like remote.c but is for an esoteric situation--
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having an a29k 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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In reality, this module talks to a debug monitor called 'STDEBUG', which
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runs in a phone switch. We communicate with STDEBUG via either a direct
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serial line, or a TCP (or possibly TELNET) stream to a terminal multiplexor,
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which in turn talks to the phone switch. */
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#include "defs.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "wait.h"
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#include <varargs.h>
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#include <signal.h>
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#include <string.h>
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#include <sys/types.h>
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#include "serial.h"
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extern struct target_ops st2000_ops; /* Forward declaration */
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static void st2000_close();
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static void st2000_fetch_register();
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static void st2000_store_register();
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#define LOG_FILE "st2000.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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st2000_open knows that we don't have a file open when the program
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starts. */
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static serial_t st2000_desc;
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/* Send data to stdebug. Works just like printf. */
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static void
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printf_stdebug(va_alist)
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va_dcl
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{
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va_list args;
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char *pattern;
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char buf[200];
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va_start(args);
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pattern = va_arg(args, char *);
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vsprintf(buf, pattern, args);
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if (SERIAL_WRITE(st2000_desc, buf, strlen(buf)))
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fprintf(stderr, "SERIAL_WRITE failed: %s\n", safe_strerror(errno));
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}
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/* Read a character from the remote system, doing all the fancy timeout
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stuff. */
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static int
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readchar(timeout)
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int timeout;
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{
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int c;
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c = SERIAL_READCHAR(st2000_desc, timeout);
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#ifdef LOG_FILE
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putc(c & 0x7f, log_file);
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#endif
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if (c >= 0)
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return c & 0x7f;
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if (c == SERIAL_TIMEOUT)
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{
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if (timeout == 0)
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return c; /* Polls shouldn't generate timeout errors */
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error("Timeout reading from remote system.");
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}
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perror_with_name("remote-st2000");
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}
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/* Scan input from the remote system, until STRING is found. If DISCARD is
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non-zero, then discard non-matching input, else print it out.
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Let the user break out immediately. */
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static void
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expect(string, discard)
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char *string;
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int discard;
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{
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char *p = string;
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int c;
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immediate_quit = 1;
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while (1)
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{
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c = readchar(timeout);
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if (c == *p++)
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{
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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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{
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if (!discard)
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{
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fwrite(string, 1, (p - 1) - string, stdout);
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putchar((char)c);
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fflush(stdout);
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}
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p = string;
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}
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}
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}
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/* Keep discarding input until we see the STDEBUG 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: st2000_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 st2000_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(discard)
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int discard;
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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 ("dbug> ", discard);
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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(timeout);
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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(1);
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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 stdebug 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++, (char *) &val);
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}
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}
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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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st2000_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 STDEBUG 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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/* 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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/* Open a connection to a remote debugger.
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NAME is the filename used for communication. */
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static int baudrate = 9600;
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static char dev_name[100];
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static void
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st2000_open(args, from_tty)
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char *args;
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int from_tty;
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{
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int n;
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char junk[100];
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target_preopen(from_tty);
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n = sscanf(args, " %s %d %s", dev_name, &baudrate, junk);
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if (n != 2)
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error("Bad arguments. Usage: target st2000 <device> <speed>\n\
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or target st2000 <host> <port>\n");
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st2000_close(0);
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st2000_desc = SERIAL_OPEN(dev_name);
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if (!st2000_desc)
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perror_with_name(dev_name);
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SERIAL_SETBAUDRATE(st2000_desc, baudrate);
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SERIAL_RAW(st2000_desc);
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push_target(&st2000_ops);
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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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printf_stdebug("\003"); /* ^C wakes up dbug */
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expect_prompt(1);
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if (from_tty)
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printf("Remote %s connected to %s\n", target_shortname,
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dev_name);
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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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st2000_close (quitting)
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int quitting;
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{
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SERIAL_CLOSE(st2000_desc);
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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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fprintf(stderr, "Error writing log file.\n");
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if (fclose(log_file) != 0)
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fprintf(stderr, "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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static void
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st2000_detach (from_tty)
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int from_tty;
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{
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pop_target(); /* calls st2000_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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static void
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st2000_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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printf_stdebug ("ST\r");
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/* Wait for the echo. */
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expect ("ST\r", 1);
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}
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else
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{
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printf_stdebug ("GO\r");
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/* Swallow the echo. */
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expect ("GO\r", 1);
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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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static int
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st2000_wait (status)
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WAITTYPE *status;
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{
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int old_timeout = timeout;
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WSETEXIT ((*status), 0);
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timeout = 0; /* Don't time out -- user program is running. */
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expect_prompt(0); /* Wait for prompt, outputting extraneous text */
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WSETSTOP ((*status), SIGTRAP);
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timeout = old_timeout;
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return 0;
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}
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/* Return the name of register number REGNO in the form input and output by
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STDEBUG. Currently, REGISTER_NAMES just happens to contain exactly what
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STDEBUG wants. Lets take advantage of that just as long as possible! */
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static char *
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get_reg_name (regno)
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int regno;
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{
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static char buf[50];
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const char *p;
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char *b;
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b = buf;
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for (p = reg_names[regno]; *p; p++)
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*b++ = toupper(*p);
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*b = '\000';
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return buf;
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}
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/* Read the remote registers into the block REGS. */
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static void
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st2000_fetch_registers ()
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{
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int regno;
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/* Yeah yeah, I know this is horribly inefficient. But it isn't done
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very often... I'll clean it up later. */
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for (regno = 0; regno <= PC_REGNUM; regno++)
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st2000_fetch_register(regno);
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}
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/* Fetch register REGNO, or all registers if REGNO is -1.
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Returns errno value. */
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static void
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st2000_fetch_register (regno)
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int regno;
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{
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if (regno == -1)
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st2000_fetch_registers ();
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else
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{
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char *name = get_reg_name (regno);
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printf_stdebug ("DR %s\r", name);
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expect (name, 1);
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expect (" : ", 1);
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get_hex_regs (1, regno);
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expect_prompt (1);
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}
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return;
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}
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/* Store the remote registers from the contents of the block REGS. */
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static void
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st2000_store_registers ()
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{
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int regno;
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for (regno = 0; regno <= PC_REGNUM; regno++)
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st2000_store_register(regno);
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registers_changed ();
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}
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/* Store register REGNO, or all if REGNO == 0.
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Return errno value. */
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static void
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st2000_store_register (regno)
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int regno;
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{
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if (regno == -1)
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st2000_store_registers ();
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else
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{
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printf_stdebug ("PR %s %x\r", get_reg_name (regno),
|
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read_register (regno));
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expect_prompt (1);
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}
|
||||
}
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||||
|
||||
/* Get ready to modify the registers array. On machines which store
|
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individual registers, this doesn't need to do anything. On machines
|
||||
which store all the registers in one fell swoop, this makes sure
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that registers contains all the registers from the program being
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debugged. */
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static void
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st2000_prepare_to_store ()
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{
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/* Do nothing, since we can store individual regs */
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}
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static void
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st2000_files_info ()
|
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{
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printf ("\tAttached to %s at %d baud.\n",
|
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dev_name, baudrate);
|
||||
}
|
||||
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||||
/* Copy LEN bytes of data from debugger memory at MYADDR
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to inferior's memory at MEMADDR. Returns length moved. */
|
||||
static int
|
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st2000_write_inferior_memory (memaddr, myaddr, len)
|
||||
CORE_ADDR memaddr;
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||||
unsigned char *myaddr;
|
||||
int len;
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < len; i++)
|
||||
{
|
||||
printf_stdebug ("PM.B %x %x\r", memaddr + i, myaddr[i]);
|
||||
expect_prompt (1);
|
||||
}
|
||||
return len;
|
||||
}
|
||||
|
||||
/* Read LEN bytes from inferior memory at MEMADDR. Put the result
|
||||
at debugger address MYADDR. Returns length moved. */
|
||||
static int
|
||||
st2000_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
|
||||
st2000_read_bytes (CORE_ADDR_MAX - 4, foo, 4)
|
||||
works--it never adds len to memaddr and gets 0. */
|
||||
/* However, something like
|
||||
st2000_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);
|
||||
|
||||
printf_stdebug ("DI.L %x %x\r", startaddr, len_this_pass);
|
||||
expect (": ", 1);
|
||||
|
||||
for (i = 0; i < len_this_pass; i++)
|
||||
get_hex_byte (&myaddr[count++]);
|
||||
|
||||
expect_prompt (1);
|
||||
|
||||
startaddr += len_this_pass;
|
||||
}
|
||||
return len;
|
||||
}
|
||||
|
||||
/* FIXME-someday! Merge these two. */
|
||||
static int
|
||||
st2000_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 st2000_write_inferior_memory (memaddr, myaddr, len);
|
||||
else
|
||||
return st2000_read_inferior_memory (memaddr, myaddr, len);
|
||||
}
|
||||
|
||||
static void
|
||||
st2000_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. */
|
||||
|
||||
static void
|
||||
st2000_mourn_inferior ()
|
||||
{
|
||||
remove_breakpoints ();
|
||||
unpush_target (&st2000_ops);
|
||||
generic_mourn_inferior (); /* Do all the proper things now */
|
||||
}
|
||||
|
||||
#define MAX_STDEBUG_BREAKPOINTS 16
|
||||
|
||||
extern int memory_breakpoint_size;
|
||||
static CORE_ADDR breakaddr[MAX_STDEBUG_BREAKPOINTS] = {0};
|
||||
|
||||
static int
|
||||
st2000_insert_breakpoint (addr, shadow)
|
||||
CORE_ADDR addr;
|
||||
char *shadow;
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i <= MAX_STDEBUG_BREAKPOINTS; i++)
|
||||
if (breakaddr[i] == 0)
|
||||
{
|
||||
breakaddr[i] = addr;
|
||||
|
||||
st2000_read_inferior_memory(addr, shadow, memory_breakpoint_size);
|
||||
printf_stdebug("BR %x H\r", addr);
|
||||
expect_prompt(1);
|
||||
return 0;
|
||||
}
|
||||
|
||||
fprintf(stderr, "Too many breakpoints (> 16) for STDBUG\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
st2000_remove_breakpoint (addr, shadow)
|
||||
CORE_ADDR addr;
|
||||
char *shadow;
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < MAX_STDEBUG_BREAKPOINTS; i++)
|
||||
if (breakaddr[i] == addr)
|
||||
{
|
||||
breakaddr[i] = 0;
|
||||
|
||||
printf_stdebug("CB %d\r", i);
|
||||
expect_prompt(1);
|
||||
return 0;
|
||||
}
|
||||
|
||||
fprintf(stderr, "Can't find breakpoint associated with 0x%x\n", addr);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/* Put a command string, in args, out to STDBUG. Output from STDBUG is placed
|
||||
on the users terminal until the prompt is seen. */
|
||||
|
||||
static void
|
||||
st2000_command (args, fromtty)
|
||||
char *args;
|
||||
int fromtty;
|
||||
{
|
||||
if (!st2000_desc)
|
||||
error("st2000 target not open.");
|
||||
|
||||
if (!args)
|
||||
error("Missing command.");
|
||||
|
||||
printf_stdebug("%s\r", args);
|
||||
expect_prompt(0);
|
||||
}
|
||||
|
||||
/* Connect the user directly to STDBUG. This command acts just like the
|
||||
'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
|
||||
|
||||
/*static struct ttystate ttystate;*/
|
||||
|
||||
static void
|
||||
cleanup_tty()
|
||||
{
|
||||
printf("\r\n[Exiting connect mode]\r\n");
|
||||
/* SERIAL_RESTORE(0, &ttystate);*/
|
||||
}
|
||||
|
||||
#if 0
|
||||
/* This all should now be in serial.c */
|
||||
|
||||
static void
|
||||
connect_command (args, fromtty)
|
||||
char *args;
|
||||
int fromtty;
|
||||
{
|
||||
fd_set readfds;
|
||||
int numfds;
|
||||
int c;
|
||||
char cur_esc = 0;
|
||||
|
||||
dont_repeat();
|
||||
|
||||
if (st2000_desc < 0)
|
||||
error("st2000 target not open.");
|
||||
|
||||
if (args)
|
||||
fprintf("This command takes no args. They have been ignored.\n");
|
||||
|
||||
printf("[Entering connect mode. Use ~. or ~^D to escape]\n");
|
||||
|
||||
serial_raw(0, &ttystate);
|
||||
|
||||
make_cleanup(cleanup_tty, 0);
|
||||
|
||||
FD_ZERO(&readfds);
|
||||
|
||||
while (1)
|
||||
{
|
||||
do
|
||||
{
|
||||
FD_SET(0, &readfds);
|
||||
FD_SET(st2000_desc, &readfds);
|
||||
numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0);
|
||||
}
|
||||
while (numfds == 0);
|
||||
|
||||
if (numfds < 0)
|
||||
perror_with_name("select");
|
||||
|
||||
if (FD_ISSET(0, &readfds))
|
||||
{ /* tty input, send to stdebug */
|
||||
c = getchar();
|
||||
if (c < 0)
|
||||
perror_with_name("connect");
|
||||
|
||||
printf_stdebug("%c", c);
|
||||
switch (cur_esc)
|
||||
{
|
||||
case 0:
|
||||
if (c == '\r')
|
||||
cur_esc = c;
|
||||
break;
|
||||
case '\r':
|
||||
if (c == '~')
|
||||
cur_esc = c;
|
||||
else
|
||||
cur_esc = 0;
|
||||
break;
|
||||
case '~':
|
||||
if (c == '.' || c == '\004')
|
||||
return;
|
||||
else
|
||||
cur_esc = 0;
|
||||
}
|
||||
}
|
||||
|
||||
if (FD_ISSET(st2000_desc, &readfds))
|
||||
{
|
||||
while (1)
|
||||
{
|
||||
c = readchar(0);
|
||||
if (c < 0)
|
||||
break;
|
||||
putchar(c);
|
||||
}
|
||||
fflush(stdout);
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif /* 0 */
|
||||
|
||||
/* Define the target subroutine names */
|
||||
|
||||
struct target_ops st2000_ops = {
|
||||
"st2000",
|
||||
"Remote serial Tandem ST2000 target",
|
||||
"Use a remote computer running STDEBUG connected by a serial line,\n\
|
||||
or a network connection.\n\
|
||||
Arguments are the name of the device for the serial line,\n\
|
||||
the speed to connect at in bits per second.",
|
||||
st2000_open,
|
||||
st2000_close,
|
||||
0,
|
||||
st2000_detach,
|
||||
st2000_resume,
|
||||
st2000_wait,
|
||||
st2000_fetch_register,
|
||||
st2000_store_register,
|
||||
st2000_prepare_to_store,
|
||||
st2000_xfer_inferior_memory,
|
||||
st2000_files_info,
|
||||
st2000_insert_breakpoint,
|
||||
st2000_remove_breakpoint, /* Breakpoints */
|
||||
0,
|
||||
0,
|
||||
0,
|
||||
0,
|
||||
0, /* Terminal handling */
|
||||
st2000_kill,
|
||||
0, /* load */
|
||||
0, /* lookup_symbol */
|
||||
st2000_create_inferior,
|
||||
st2000_mourn_inferior,
|
||||
0, /* can_run */
|
||||
0, /* notice_signals */
|
||||
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_st2000 ()
|
||||
{
|
||||
add_target (&st2000_ops);
|
||||
add_com ("st2000 <command>", class_obscure, st2000_command,
|
||||
"Send a command to the STDBUG monitor.");
|
||||
add_com ("connect", class_obscure, connect_command,
|
||||
"Connect the terminal directly up to the STDBUG command monitor.\n\
|
||||
Use <CR>~. or <CR>~^D to break out.");
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user