+++ /dev/null
-/* Remote debugging interface for Array Tech RAID controller..
-
- Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
-
- Contributed by Cygnus Support. Written by Rob Savoye for Cygnus.
-
- This module talks to a debug monitor called 'MONITOR', which
- We communicate with MONITOR via either a direct serial line, or a TCP
- (or possibly TELNET) stream to a terminal multiplexor,
- which in turn talks to the target board.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-#include "gdbcore.h"
-#include "target.h"
-#include <ctype.h>
-#include <sys/types.h>
-#include "gdb_string.h"
-#include "command.h"
-#include "serial.h"
-#include "monitor.h"
-#include "remote-utils.h"
-#include "inferior.h"
-#include "version.h"
-#include "regcache.h"
-
-extern int baud_rate;
-
-#define ARRAY_PROMPT ">> "
-
-static void debuglogs (int, char *, ...);
-static void array_open ();
-static void array_close ();
-static void array_detach ();
-static void array_attach ();
-static void array_resume (ptid_t ptid, int step, enum target_signal sig);
-static void array_fetch_register ();
-static void array_store_register ();
-static void array_fetch_registers ();
-static void array_store_registers ();
-static void array_prepare_to_store ();
-static void array_files_info ();
-static void array_kill ();
-static void array_create_inferior ();
-static void array_mourn_inferior ();
-static void make_gdb_packet ();
-static int array_xfer_memory ();
-static ptid_t array_wait (ptid_t ptid,
- struct target_waitstatus *status);
-static int array_insert_breakpoint ();
-static int array_remove_breakpoint ();
-static int tohex ();
-static int to_hex ();
-static int from_hex ();
-static int array_send_packet ();
-static int array_get_packet ();
-static unsigned long ascii2hexword ();
-static void hexword2ascii ();
-
-#define LOG_FILE "monitor.log"
-#if defined (LOG_FILE)
-FILE *log_file;
-#endif
-
-static int timeout = 30;
-/* Having this larger than 400 causes us to be incompatible with
- m68k-stub.c and i386-stub.c. Normally, no one would notice because
- it only matters for writing large chunks of memory (e.g. in
- downloads). Also, this needs to be more than 400 if required to
- hold the registers (see below, where we round it up based on
- DEPRECATED_REGISTER_BYTES). */
-#define PBUFSIZ 400
-
-/*
- * Descriptor for I/O to remote machine. Initialize it to NULL so that
- * array_open knows that we don't have a file open when the program starts.
- */
-struct serial *array_desc = NULL;
-
-/*
- * this array of registers need to match the indexes used by GDB. The
- * whole reason this exists is cause the various ROM monitors use
- * different strings than GDB does, and doesn't support all the
- * registers either. So, typing "info reg sp" becomes a "r30".
- */
-extern char *tmp_mips_processor_type;
-extern int mips_set_processor_type ();
-
-static struct target_ops array_ops;
-
-static void
-init_array_ops (void)
-{
- array_ops.to_shortname = "array";
- array_ops.to_longname =
- "Debug using the standard GDB remote protocol for the Array Tech target.",
- array_ops.to_doc =
- "Debug using the standard GDB remote protocol for the Array Tech target.\n\
-Specify the serial device it is connected to (e.g. /dev/ttya).";
- array_ops.to_open = array_open;
- array_ops.to_close = array_close;
- array_ops.to_detach = array_detach;
- array_ops.to_resume = array_resume;
- array_ops.to_wait = array_wait;
- array_ops.to_fetch_registers = array_fetch_registers;
- array_ops.to_store_registers = array_store_registers;
- array_ops.to_prepare_to_store = array_prepare_to_store;
- array_ops.to_xfer_memory = array_xfer_memory;
- array_ops.to_files_info = array_files_info;
- array_ops.to_insert_breakpoint = array_insert_breakpoint;
- array_ops.to_remove_breakpoint = array_remove_breakpoint;
- array_ops.to_kill = array_kill;
- array_ops.to_create_inferior = array_create_inferior;
- array_ops.to_mourn_inferior = array_mourn_inferior;
- array_ops.to_stratum = process_stratum;
- array_ops.to_has_all_memory = 1;
- array_ops.to_has_memory = 1;
- array_ops.to_has_stack = 1;
- array_ops.to_has_registers = 1;
- array_ops.to_has_execution = 1;
- array_ops.to_magic = OPS_MAGIC;
-};
-
-/*
- * printf_monitor -- send data to monitor. Works just like printf.
- */
-static void
-printf_monitor (char *pattern,...)
-{
- va_list args;
- char buf[PBUFSIZ];
- int i;
-
- va_start (args, pattern);
-
- vsprintf (buf, pattern, args);
-
- debuglogs (1, "printf_monitor(), Sending: \"%s\".", buf);
-
- if (strlen (buf) > PBUFSIZ)
- error ("printf_monitor(): string too long");
- if (serial_write (array_desc, buf, strlen (buf)))
- fprintf_unfiltered (gdb_stderr, "serial_write failed: %s\n",
- safe_strerror (errno));
-}
-/*
- * write_monitor -- send raw data to monitor.
- */
-static void
-write_monitor (char data[], int len)
-{
- if (serial_write (array_desc, data, len))
- fprintf_unfiltered (gdb_stderr, "serial_write failed: %s\n",
- safe_strerror (errno));
-
- *(data + len + 1) = '\0';
- debuglogs (1, "write_monitor(), Sending: \"%s\".", data);
-
-}
-
-/*
- * debuglogs -- deal with debugging info to multiple sources. This takes
- * two real args, the first one is the level to be compared against
- * the sr_get_debug() value, the second arg is a printf buffer and args
- * to be formatted and printed. A CR is added after each string is printed.
- */
-static void
-debuglogs (int level, char *pattern,...)
-{
- va_list args;
- char *p;
- unsigned char buf[PBUFSIZ];
- char newbuf[PBUFSIZ];
- int i;
-
- va_start (args, pattern);
-
- if ((level < 0) || (level > 100))
- {
- error ("Bad argument passed to debuglogs(), needs debug level");
- return;
- }
-
- vsprintf (buf, pattern, args); /* format the string */
-
- /* convert some characters so it'll look right in the log */
- p = newbuf;
- for (i = 0; buf[i] != '\0'; i++)
- {
- if (i > PBUFSIZ)
- error ("Debug message too long");
- switch (buf[i])
- {
- case '\n': /* newlines */
- *p++ = '\\';
- *p++ = 'n';
- continue;
- case '\r': /* carriage returns */
- *p++ = '\\';
- *p++ = 'r';
- continue;
- case '\033': /* escape */
- *p++ = '\\';
- *p++ = 'e';
- continue;
- case '\t': /* tab */
- *p++ = '\\';
- *p++ = 't';
- continue;
- case '\b': /* backspace */
- *p++ = '\\';
- *p++ = 'b';
- continue;
- default: /* no change */
- *p++ = buf[i];
- }
-
- if (buf[i] < 26)
- { /* modify control characters */
- *p++ = '^';
- *p++ = buf[i] + 'A';
- continue;
- }
- if (buf[i] >= 128)
- { /* modify control characters */
- *p++ = '!';
- *p++ = buf[i] + 'A';
- continue;
- }
- }
- *p = '\0'; /* terminate the string */
-
- if (sr_get_debug () > level)
- printf_unfiltered ("%s\n", newbuf);
-
-#ifdef LOG_FILE /* write to the monitor log */
- if (log_file != 0x0)
- {
- fputs (newbuf, log_file);
- fputc ('\n', log_file);
- fflush (log_file);
- }
-#endif
-}
-
-/* readchar -- read a character from the remote system, doing all the fancy
- * timeout stuff.
- */
-static int
-readchar (int timeout)
-{
- int c;
-
- c = serial_readchar (array_desc, abs (timeout));
-
- if (sr_get_debug () > 5)
- {
- putchar (c & 0x7f);
- debuglogs (5, "readchar: timeout = %d\n", timeout);
- }
-
-#ifdef LOG_FILE
- if (isascii (c))
- putc (c & 0x7f, log_file);
-#endif
-
- if (c >= 0)
- return c & 0x7f;
-
- if (c == SERIAL_TIMEOUT)
- {
- if (timeout <= 0)
- return c; /* Polls shouldn't generate timeout errors */
- error ("Timeout reading from remote system.");
-#ifdef LOG_FILE
- fputs ("ERROR: Timeout reading from remote system", log_file);
-#endif
- }
- perror_with_name ("readchar");
-}
-
-/*
- * expect -- scan input from the remote system, until STRING is found.
- * If DISCARD is non-zero, then discard non-matching input, else print
- * it out. Let the user break out immediately.
- */
-static void
-expect (char *string, int discard)
-{
- char *p = string;
- int c;
-
-
- debuglogs (1, "Expecting \"%s\".", string);
-
- immediate_quit++;
- while (1)
- {
- c = readchar (timeout);
- if (!isascii (c))
- continue;
- if (c == *p++)
- {
- if (*p == '\0')
- {
- immediate_quit--;
- debuglogs (4, "Matched");
- return;
- }
- }
- else
- {
- if (!discard)
- {
- fputc_unfiltered (c, gdb_stdout);
- }
- p = string;
- }
- }
-}
-
-/* Keep discarding input until we see the MONITOR array_cmds->prompt.
-
- The convention for dealing with the expect_prompt is that you
- o give your command
- o *then* wait for the expect_prompt.
-
- Thus the last thing that a procedure does with the serial line
- will be an expect_prompt(). Exception: array_resume does not
- wait for the expect_prompt, because the terminal is being handed over
- to the inferior. However, the next thing which happens after that
- is a array_wait which does wait for the expect_prompt.
- Note that this includes abnormal exit, e.g. error(). This is
- necessary to prevent getting into states from which we can't
- recover. */
-static void
-expect_prompt (int discard)
-{
- expect (ARRAY_PROMPT, discard);
-}
-
-/*
- * junk -- ignore junk characters. Returns a 1 if junk, 0 otherwise
- */
-static int
-junk (char ch)
-{
- switch (ch)
- {
- case '\0':
- case ' ':
- case '-':
- case '\t':
- case '\r':
- case '\n':
- if (sr_get_debug () > 5)
- debuglogs (5, "Ignoring \'%c\'.", ch);
- return 1;
- default:
- if (sr_get_debug () > 5)
- debuglogs (5, "Accepting \'%c\'.", ch);
- return 0;
- }
-}
-
-/*
- * get_hex_digit -- Get a hex digit from the remote system & return its value.
- * If ignore is nonzero, ignore spaces, newline & tabs.
- */
-static int
-get_hex_digit (int ignore)
-{
- static int ch;
- while (1)
- {
- ch = readchar (timeout);
- if (junk (ch))
- continue;
- if (sr_get_debug () > 4)
- {
- debuglogs (4, "get_hex_digit() got a 0x%x(%c)", ch, ch);
- }
- else
- {
-#ifdef LOG_FILE /* write to the monitor log */
- if (log_file != 0x0)
- {
- fputs ("get_hex_digit() got a 0x", log_file);
- fputc (ch, log_file);
- fputc ('\n', log_file);
- fflush (log_file);
- }
-#endif
- }
-
- if (ch >= '0' && ch <= '9')
- return ch - '0';
- else if (ch >= 'A' && ch <= 'F')
- return ch - 'A' + 10;
- else if (ch >= 'a' && ch <= 'f')
- return ch - 'a' + 10;
- else if (ch == ' ' && ignore)
- ;
- else
- {
- expect_prompt (1);
- debuglogs (4, "Invalid hex digit from remote system. (0x%x)", ch);
- error ("Invalid hex digit from remote system. (0x%x)", ch);
- }
- }
-}
-
-/* get_hex_byte -- Get a byte from monitor and put it in *BYT.
- * Accept any number leading spaces.
- */
-static void
-get_hex_byte (char *byt)
-{
- int val;
-
- val = get_hex_digit (1) << 4;
- debuglogs (4, "get_hex_byte() -- Read first nibble 0x%x", val);
-
- val |= get_hex_digit (0);
- debuglogs (4, "get_hex_byte() -- Read second nibble 0x%x", val);
- *byt = val;
-
- debuglogs (4, "get_hex_byte() -- Read a 0x%x", val);
-}
-
-/*
- * get_hex_word -- Get N 32-bit words from remote, each preceded by a space,
- * and put them in registers starting at REGNO.
- */
-static int
-get_hex_word (void)
-{
- long val, newval;
- int i;
-
- val = 0;
-
- for (i = 0; i < 8; i++)
- val = (val << 4) + get_hex_digit (i == 0);
-
- debuglogs (4, "get_hex_word() got a 0x%x.", val);
-
- return val;
-}
-
-/* This is called not only when we first attach, but also when the
- user types "run" after having attached. */
-static void
-array_create_inferior (char *execfile, char *args, char **env)
-{
- int entry_pt;
-
- if (args && *args)
- error ("Can't pass arguments to remote MONITOR process");
-
- if (execfile == 0 || exec_bfd == 0)
- error ("No executable file specified");
-
- entry_pt = (int) bfd_get_start_address (exec_bfd);
-
-/* The "process" (board) is already stopped awaiting our commands, and
- the program is already downloaded. We just set its PC and go. */
-
- clear_proceed_status ();
-
- /* Tell wait_for_inferior that we've started a new process. */
- init_wait_for_inferior ();
-
- /* Set up the "saved terminal modes" of the inferior
- based on what modes we are starting it with. */
- target_terminal_init ();
-
- /* Install inferior's terminal modes. */
- target_terminal_inferior ();
-
- /* insert_step_breakpoint (); FIXME, do we need this? */
-
- /* Let 'er rip... */
- proceed ((CORE_ADDR) entry_pt, TARGET_SIGNAL_DEFAULT, 0);
-}
-
-/*
- * array_open -- open a connection to a remote debugger.
- * NAME is the filename used for communication.
- */
-static int baudrate = 9600;
-static char dev_name[100];
-
-static void
-array_open (char *args, char *name, int from_tty)
-{
- char packet[PBUFSIZ];
-
- if (args == NULL)
- error ("Use `target %s DEVICE-NAME' to use a serial port, or \n\
-`target %s HOST-NAME:PORT-NUMBER' to use a network connection.", name, name);
-
-/* if (is_open) */
- array_close (0);
-
- target_preopen (from_tty);
- unpush_target (&array_ops);
-
- tmp_mips_processor_type = "lsi33k"; /* change the default from r3051 */
- mips_set_processor_type_command ("lsi33k", 0);
-
- strcpy (dev_name, args);
- array_desc = serial_open (dev_name);
-
- if (array_desc == NULL)
- perror_with_name (dev_name);
-
- if (baud_rate != -1)
- {
- if (serial_setbaudrate (array_desc, baud_rate))
- {
- serial_close (array_desc);
- perror_with_name (name);
- }
- }
-
- serial_raw (array_desc);
-
-#if defined (LOG_FILE)
- log_file = fopen (LOG_FILE, "w");
- if (log_file == NULL)
- perror_with_name (LOG_FILE);
- fprintf (log_file, "GDB %s (%s", version, host_name);
- fprintf (log_file, " --target %s)\n", array_ops.to_shortname);
- fprintf (log_file, "Remote target %s connected to %s\n\n", array_ops.to_shortname, dev_name);
-#endif
-
- /* see if the target is alive. For a ROM monitor, we can just try to force the
- expect_prompt to print a few times. For the GDB remote protocol, the application
- being debugged is sitting at a breakpoint and waiting for GDB to initialize
- the connection. We force it to give us an empty packet to see if it's alive.
- */
- debuglogs (3, "Trying to ACK the target's debug stub");
- /* unless your are on the new hardware, the old board won't initialize
- because the '@' doesn't flush output like it does on the new ROMS.
- */
- printf_monitor ("@"); /* ask for the last signal */
- expect_prompt (1); /* See if we get a expect_prompt */
-#ifdef TEST_ARRAY /* skip packet for testing */
- make_gdb_packet (packet, "?"); /* ask for a bogus packet */
- if (array_send_packet (packet) == 0)
- error ("Couldn't transmit packet\n");
- printf_monitor ("@\n"); /* force it to flush stdout */
- expect_prompt (1); /* See if we get a expect_prompt */
-#endif
- push_target (&array_ops);
- if (from_tty)
- printf ("Remote target %s connected to %s\n", array_ops.to_shortname, dev_name);
-}
-
-/*
- * array_close -- Close out all files and local state before this
- * target loses control.
- */
-
-static void
-array_close (int quitting)
-{
- serial_close (array_desc);
- array_desc = NULL;
-
- debuglogs (1, "array_close (quitting=%d)", quitting);
-
-#if defined (LOG_FILE)
- if (log_file)
- {
- if (ferror (log_file))
- printf_filtered ("Error writing log file.\n");
- if (fclose (log_file) != 0)
- printf_filtered ("Error closing log file.\n");
- }
-#endif
-}
-
-/*
- * array_detach -- terminate the open connection to the remote
- * debugger. Use this when you want to detach and do something
- * else with your gdb.
- */
-static void
-array_detach (int from_tty)
-{
-
- debuglogs (1, "array_detach ()");
-
- pop_target (); /* calls array_close to do the real work */
- if (from_tty)
- printf ("Ending remote %s debugging\n", target_shortname);
-}
-
-/*
- * array_attach -- attach GDB to the target.
- */
-static void
-array_attach (char *args, int from_tty)
-{
- if (from_tty)
- printf ("Starting remote %s debugging\n", target_shortname);
-
- debuglogs (1, "array_attach (args=%s)", args);
-
- printf_monitor ("go %x\n");
- /* swallow the echo. */
- expect ("go %x\n", 1);
-}
-
-/*
- * array_resume -- Tell the remote machine to resume.
- */
-static void
-array_resume (ptid_t ptid, int step, enum target_signal sig)
-{
- debuglogs (1, "array_resume (step=%d, sig=%d)", step, sig);
-
- if (step)
- {
- printf_monitor ("s\n");
- }
- else
- {
- printf_monitor ("go\n");
- }
-}
-
-#define TMPBUFSIZ 5
-
-/*
- * array_wait -- Wait until the remote machine stops, then return,
- * storing status in status just as `wait' would.
- */
-static ptid_t
-array_wait (ptid_t ptid, struct target_waitstatus *status)
-{
- int old_timeout = timeout;
- int result, i;
- char c;
- struct serial *tty_desc;
- serial_ttystate ttystate;
-
- debuglogs (1, "array_wait (), printing extraneous text.");
-
- status->kind = TARGET_WAITKIND_EXITED;
- status->value.integer = 0;
-
- timeout = 0; /* Don't time out -- user program is running. */
-
-#if !defined(__GO32__) && !defined(__MSDOS__) && !defined(_WIN32)
- tty_desc = serial_fdopen (0);
- ttystate = serial_get_tty_state (tty_desc);
- serial_raw (tty_desc);
-
- i = 0;
- /* poll on the serial port and the keyboard. */
- while (1)
- {
- c = readchar (timeout);
- if (c > 0)
- {
- if (c == *(ARRAY_PROMPT + i))
- {
- if (++i >= strlen (ARRAY_PROMPT))
- { /* matched the prompt */
- debuglogs (4, "array_wait(), got the expect_prompt.");
- break;
- }
- }
- else
- { /* not the prompt */
- i = 0;
- }
- fputc_unfiltered (c, gdb_stdout);
- gdb_flush (gdb_stdout);
- }
- c = serial_readchar (tty_desc, timeout);
- if (c > 0)
- {
- serial_write (array_desc, &c, 1);
- /* do this so it looks like there's keyboard echo */
- if (c == 3) /* exit on Control-C */
- break;
-#if 0
- fputc_unfiltered (c, gdb_stdout);
- gdb_flush (gdb_stdout);
-#endif
- }
- }
- serial_set_tty_state (tty_desc, ttystate);
-#else
- expect_prompt (1);
- debuglogs (4, "array_wait(), got the expect_prompt.");
-#endif
-
- status->kind = TARGET_WAITKIND_STOPPED;
- status->value.sig = TARGET_SIGNAL_TRAP;
-
- timeout = old_timeout;
-
- return inferior_ptid;
-}
-
-/*
- * array_fetch_registers -- read the remote registers into the
- * block regs.
- */
-static void
-array_fetch_registers (int ignored)
-{
- char reg[MAX_REGISTER_SIZE];
- int regno;
- char *p;
- char *packet = alloca (PBUFSIZ);
-
- debuglogs (1, "array_fetch_registers (ignored=%d)\n", ignored);
-
- memset (packet, 0, PBUFSIZ);
- make_gdb_packet (packet, "g");
- if (array_send_packet (packet) == 0)
- error ("Couldn't transmit packet\n");
- if (array_get_packet (packet) == 0)
- error ("Couldn't receive packet\n");
- /* FIXME: read bytes from packet */
- debuglogs (4, "array_fetch_registers: Got a \"%s\" back\n", packet);
- for (regno = 0; regno <= PC_REGNUM + 4; regno++)
- {
- /* supply register stores in target byte order, so swap here */
- /* FIXME: convert from ASCII hex to raw bytes */
- LONGEST i = ascii2hexword (packet + (regno * 8));
- debuglogs (5, "Adding register %d = %x\n", regno, i);
- store_unsigned_integer (®, REGISTER_RAW_SIZE (regno), i);
- supply_register (regno, (char *) ®);
- }
-}
-
-/*
- * This is unused by targets like this one that use a
- * protocol based on GDB's remote protocol.
- */
-static void
-array_fetch_register (int ignored)
-{
- array_fetch_registers (0 /* ignored */);
-}
-
-/*
- * Get all the registers from the targets. They come back in a large array.
- */
-static void
-array_store_registers (int ignored)
-{
- int regno;
- unsigned long i;
- char packet[PBUFSIZ];
- char buf[PBUFSIZ];
- char num[9];
-
- debuglogs (1, "array_store_registers()");
-
- memset (packet, 0, PBUFSIZ);
- memset (buf, 0, PBUFSIZ);
- buf[0] = 'G';
-
- /* Unimplemented registers read as all bits zero. */
- /* FIXME: read bytes from packet */
- for (regno = 0; regno < 41; regno++)
- { /* FIXME */
- /* supply register stores in target byte order, so swap here */
- /* FIXME: convert from ASCII hex to raw bytes */
- i = (unsigned long) read_register (regno);
- hexword2ascii (num, i);
- strcpy (buf + (regno * 8) + 1, num);
- }
- *(buf + (regno * 8) + 2) = 0;
- make_gdb_packet (packet, buf);
- if (array_send_packet (packet) == 0)
- error ("Couldn't transmit packet\n");
- if (array_get_packet (packet) == 0)
- error ("Couldn't receive packet\n");
-
- registers_changed ();
-}
-
-/*
- * This is unused by targets like this one that use a
- * protocol based on GDB's remote protocol.
- */
-static void
-array_store_register (int ignored)
-{
- array_store_registers (0 /* ignored */);
-}
-
-/* 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. */
-
-static void
-array_prepare_to_store (void)
-{
- /* Do nothing, since we can store individual regs */
-}
-
-static void
-array_files_info (void)
-{
- printf ("\tAttached to %s at %d baud.\n",
- dev_name, baudrate);
-}
-
-/*
- * array_write_inferior_memory -- Copy LEN bytes of data from debugger
- * memory at MYADDR to inferior's memory at MEMADDR. Returns length moved.
- */
-static int
-array_write_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
-{
- unsigned long i;
- int j;
- char packet[PBUFSIZ];
- char buf[PBUFSIZ];
- char num[9];
- char *p;
-
- debuglogs (1, "array_write_inferior_memory (memaddr=0x%x, myaddr=0x%x, len=%d)", memaddr, myaddr, len);
- memset (buf, '\0', PBUFSIZ); /* this also sets the string terminator */
- p = buf;
-
- *p++ = 'M'; /* The command to write memory */
- hexword2ascii (num, memaddr); /* convert the address */
- strcpy (p, num); /* copy the address */
- p += 8;
- *p++ = ','; /* add comma delimeter */
- hexword2ascii (num, len); /* Get the length as a 4 digit number */
- *p++ = num[4];
- *p++ = num[5];
- *p++ = num[6];
- *p++ = num[7];
- *p++ = ':'; /* add the colon delimeter */
- for (j = 0; j < len; j++)
- { /* copy the data in after converting it */
- *p++ = tohex ((myaddr[j] >> 4) & 0xf);
- *p++ = tohex (myaddr[j] & 0xf);
- }
-
- make_gdb_packet (packet, buf);
- if (array_send_packet (packet) == 0)
- error ("Couldn't transmit packet\n");
- if (array_get_packet (packet) == 0)
- error ("Couldn't receive packet\n");
-
- return len;
-}
-
-/*
- * array_read_inferior_memory -- read LEN bytes from inferior memory
- * at MEMADDR. Put the result at debugger address MYADDR. Returns
- * length moved.
- */
-static int
-array_read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len)
-{
- int j;
- char buf[20];
- char packet[PBUFSIZ];
- int count; /* Number of bytes read so far. */
- unsigned long startaddr; /* Starting address of this pass. */
- int len_this_pass; /* Number of bytes to read in this pass. */
-
- debuglogs (1, "array_read_inferior_memory (memaddr=0x%x, myaddr=0x%x, len=%d)", memaddr, myaddr, len);
-
- /* 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
- array_read_bytes (CORE_ADDR_MAX - 4, foo, 4)
- works--it never adds len To memaddr and gets 0. */
- /* However, something like
- array_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;
- }
-
- for (count = 0, startaddr = memaddr; count < len; startaddr += len_this_pass)
- {
- /* Try to align to 16 byte boundry (why?) */
- len_this_pass = 16;
- if ((startaddr % 16) != 0)
- {
- len_this_pass -= startaddr % 16;
- }
- /* Only transfer bytes we need */
- if (len_this_pass > (len - count))
- {
- len_this_pass = (len - count);
- }
- /* Fetch the bytes */
- debuglogs (3, "read %d bytes from inferior address %x", len_this_pass,
- startaddr);
- sprintf (buf, "m%08lx,%04x", startaddr, len_this_pass);
- make_gdb_packet (packet, buf);
- if (array_send_packet (packet) == 0)
- {
- error ("Couldn't transmit packet\n");
- }
- if (array_get_packet (packet) == 0)
- {
- error ("Couldn't receive packet\n");
- }
- if (*packet == 0)
- {
- error ("Got no data in the GDB packet\n");
- }
- /* Pick packet apart and xfer bytes to myaddr */
- debuglogs (4, "array_read_inferior_memory: Got a \"%s\" back\n", packet);
- for (j = 0; j < len_this_pass; j++)
- {
- /* extract the byte values */
- myaddr[count++] = from_hex (*(packet + (j * 2))) * 16 + from_hex (*(packet + (j * 2) + 1));
- debuglogs (5, "myaddr[%d] set to %x\n", count - 1, myaddr[count - 1]);
- }
- }
- return (count);
-}
-
-/* Transfer LEN bytes between GDB address MYADDR and target address
- MEMADDR. If WRITE is non-zero, transfer them to the target,
- otherwise transfer them from the target. TARGET is unused.
-
- Returns the number of bytes transferred. */
-
-static int
-array_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
- struct mem_attrib *attrib, struct target_ops *target)
-{
- if (write)
- return array_write_inferior_memory (memaddr, myaddr, len);
- else
- return array_read_inferior_memory (memaddr, myaddr, len);
-}
-
-static void
-array_kill (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
-array_mourn_inferior (void)
-{
- remove_breakpoints ();
- generic_mourn_inferior (); /* Do all the proper things now */
-}
-
-#define MAX_ARRAY_BREAKPOINTS 16
-
-static CORE_ADDR breakaddr[MAX_ARRAY_BREAKPOINTS] =
-{0};
-
-/*
- * array_insert_breakpoint -- add a breakpoint
- */
-static int
-array_insert_breakpoint (CORE_ADDR addr, char *shadow)
-{
- int i;
- int bp_size = 0;
- CORE_ADDR bp_addr = addr;
-
- debuglogs (1, "array_insert_breakpoint() addr = 0x%x", addr);
- BREAKPOINT_FROM_PC (&bp_addr, &bp_size);
-
- for (i = 0; i <= MAX_ARRAY_BREAKPOINTS; i++)
- {
- if (breakaddr[i] == 0)
- {
- breakaddr[i] = addr;
- if (sr_get_debug () > 4)
- printf ("Breakpoint at %s\n", paddr_nz (addr));
- array_read_inferior_memory (bp_addr, shadow, bp_size);
- printf_monitor ("b 0x%x\n", addr);
- expect_prompt (1);
- return 0;
- }
- }
-
- fprintf_unfiltered (gdb_stderr, "Too many breakpoints (> 16) for monitor\n");
- return 1;
-}
-
-/*
- * _remove_breakpoint -- Tell the monitor to remove a breakpoint
- */
-static int
-array_remove_breakpoint (CORE_ADDR addr, char *shadow)
-{
- int i;
-
- debuglogs (1, "array_remove_breakpoint() addr = 0x%x", addr);
-
- for (i = 0; i < MAX_ARRAY_BREAKPOINTS; i++)
- {
- if (breakaddr[i] == addr)
- {
- breakaddr[i] = 0;
- /* some monitors remove breakpoints based on the address */
- printf_monitor ("bd %x\n", i);
- expect_prompt (1);
- return 0;
- }
- }
- fprintf_unfiltered (gdb_stderr,
- "Can't find breakpoint associated with 0x%s\n",
- paddr_nz (addr));
- return 1;
-}
-
-static void
-array_stop (void)
-{
- debuglogs (1, "array_stop()");
- printf_monitor ("\003");
- expect_prompt (1);
-}
-
-/*
- * array_command -- put a command string, in args, out to MONITOR.
- * Output from MONITOR is placed on the users terminal until the
- * expect_prompt is seen. FIXME
- */
-static void
-monitor_command (char *args, int fromtty)
-{
- debuglogs (1, "monitor_command (args=%s)", args);
-
- if (array_desc == NULL)
- error ("monitor target not open.");
-
- if (!args)
- error ("Missing command.");
-
- printf_monitor ("%s\n", args);
- expect_prompt (0);
-}
-
-/*
- * make_gdb_packet -- make a GDB packet. The data is always ASCII.
- * A debug packet whose contents are <data>
- * is encapsulated for transmission in the form:
- *
- * $ <data> # CSUM1 CSUM2
- *
- * <data> must be ASCII alphanumeric and cannot include characters
- * '$' or '#'. If <data> starts with two characters followed by
- * ':', then the existing stubs interpret this as a sequence number.
- *
- * CSUM1 and CSUM2 are ascii hex representation of an 8-bit
- * checksum of <data>, the most significant nibble is sent first.
- * the hex digits 0-9,a-f are used.
- *
- */
-static void
-make_gdb_packet (char *buf, char *data)
-{
- int i;
- unsigned char csum = 0;
- int cnt;
- char *p;
-
- debuglogs (3, "make_gdb_packet(%s)\n", data);
- cnt = strlen (data);
- if (cnt > PBUFSIZ)
- error ("make_gdb_packet(): to much data\n");
-
- /* start with the packet header */
- p = buf;
- *p++ = '$';
-
- /* calculate the checksum */
- for (i = 0; i < cnt; i++)
- {
- csum += data[i];
- *p++ = data[i];
- }
-
- /* terminate the data with a '#' */
- *p++ = '#';
-
- /* add the checksum as two ascii digits */
- *p++ = tohex ((csum >> 4) & 0xf);
- *p++ = tohex (csum & 0xf);
- *p = 0x0; /* Null terminator on string */
-}
-
-/*
- * array_send_packet -- send a GDB packet to the target with error handling. We
- * get a '+' (ACK) back if the packet is received and the checksum
- * matches. Otherwise a '-' (NAK) is returned. It returns a 1 for a
- * successful transmition, or a 0 for a failure.
- */
-static int
-array_send_packet (char *packet)
-{
- int c, retries, i;
- char junk[PBUFSIZ];
-
- retries = 0;
-
-#if 0
- /* scan the packet to make sure it only contains valid characters.
- this may sound silly, but sometimes a garbled packet will hang
- the target board. We scan the whole thing, then print the error
- message.
- */
- for (i = 0; i < strlen (packet); i++)
- {
- debuglogs (5, "array_send_packet(): Scanning \'%c\'\n", packet[i]);
- /* legit hex numbers or command */
- if ((isxdigit (packet[i])) || (isalpha (packet[i])))
- continue;
- switch (packet[i])
- {
- case '+': /* ACK */
- case '-': /* NAK */
- case '#': /* end of packet */
- case '$': /* start of packet */
- continue;
- default: /* bogus character */
- retries++;
- debuglogs (4, "array_send_packet(): Found a non-ascii digit \'%c\' in the packet.\n", packet[i]);
- }
- }
-#endif
-
- if (retries > 0)
- error ("Can't send packet, found %d non-ascii characters", retries);
-
- /* ok, try to send the packet */
- retries = 0;
- while (retries++ <= 10)
- {
- printf_monitor ("%s", packet);
-
- /* read until either a timeout occurs (-2) or '+' is read */
- while (retries <= 10)
- {
- c = readchar (-timeout);
- debuglogs (3, "Reading a GDB protocol packet... Got a '%c'\n", c);
- switch (c)
- {
- case '+':
- debuglogs (3, "Got Ack\n");
- return 1;
- case SERIAL_TIMEOUT:
- debuglogs (3, "Timed out reading serial port\n");
- printf_monitor ("@"); /* resync with the monitor */
- expect_prompt (1); /* See if we get a expect_prompt */
- break; /* Retransmit buffer */
- case '-':
- debuglogs (3, "Got NAK\n");
- printf_monitor ("@"); /* resync with the monitor */
- expect_prompt (1); /* See if we get a expect_prompt */
- break;
- case '$':
- /* it's probably an old response, or the echo of our command.
- * just gobble up the packet and ignore it.
- */
- debuglogs (3, "Got a junk packet\n");
- i = 0;
- do
- {
- c = readchar (timeout);
- junk[i++] = c;
- }
- while (c != '#');
- c = readchar (timeout);
- junk[i++] = c;
- c = readchar (timeout);
- junk[i++] = c;
- junk[i++] = '\0';
- debuglogs (3, "Reading a junk packet, got a \"%s\"\n", junk);
- continue; /* Now, go look for next packet */
- default:
- continue;
- }
- retries++;
- debuglogs (3, "Retransmitting packet \"%s\"\n", packet);
- break; /* Here to retransmit */
- }
- } /* outer while */
- return 0;
-}
-
-/*
- * array_get_packet -- get a GDB packet from the target. Basically we read till we
- * see a '#', then check the checksum. It returns a 1 if it's gotten a
- * packet, or a 0 it the packet wasn't transmitted correctly.
- */
-static int
-array_get_packet (char *packet)
-{
- int c;
- int retries;
- unsigned char csum;
- unsigned char pktcsum;
- char *bp;
-
- csum = 0;
- bp = packet;
-
- memset (packet, 1, PBUFSIZ);
- retries = 0;
- while (retries <= 10)
- {
- do
- {
- c = readchar (timeout);
- if (c == SERIAL_TIMEOUT)
- {
- debuglogs (3, "array_get_packet: got time out from serial port.\n");
- }
- debuglogs (3, "Waiting for a '$', got a %c\n", c);
- }
- while (c != '$');
-
- retries = 0;
- while (retries <= 10)
- {
- c = readchar (timeout);
- debuglogs (3, "array_get_packet: got a '%c'\n", c);
- switch (c)
- {
- case SERIAL_TIMEOUT:
- debuglogs (3, "Timeout in mid-packet, retrying\n");
- return 0;
- case '$':
- debuglogs (3, "Saw new packet start in middle of old one\n");
- return 0; /* Start a new packet, count retries */
- case '#':
- *bp = '\0';
- pktcsum = from_hex (readchar (timeout)) << 4;
- pktcsum |= from_hex (readchar (timeout));
- if (csum == 0)
- debuglogs (3, "\nGDB packet checksum zero, must be a bogus packet\n");
- if (csum == pktcsum)
- {
- debuglogs (3, "\nGDB packet checksum correct, packet data is \"%s\",\n", packet);
- printf_monitor ("@");
- expect_prompt (1);
- return 1;
- }
- debuglogs (3, "Bad checksum, sentsum=0x%x, csum=0x%x\n", pktcsum, csum);
- return 0;
- case '*': /* Run length encoding */
- debuglogs (5, "Run length encoding in packet\n");
- csum += c;
- c = readchar (timeout);
- csum += c;
- c = c - ' ' + 3; /* Compute repeat count */
-
- if (c > 0 && c < 255 && bp + c - 1 < packet + PBUFSIZ - 1)
- {
- memset (bp, *(bp - 1), c);
- bp += c;
- continue;
- }
- *bp = '\0';
- printf_filtered ("Repeat count %d too large for buffer.\n", c);
- return 0;
-
- default:
- if ((!isxdigit (c)) && (!ispunct (c)))
- debuglogs (4, "Got a non-ascii digit \'%c\'.\\n", c);
- if (bp < packet + PBUFSIZ - 1)
- {
- *bp++ = c;
- csum += c;
- continue;
- }
-
- *bp = '\0';
- puts_filtered ("Remote packet too long.\n");
- return 0;
- }
- }
- }
- return 0; /* exceeded retries */
-}
-
-/*
- * ascii2hexword -- convert an ascii number represented by 8 digits to a hex value.
- */
-static unsigned long
-ascii2hexword (unsigned char *mem)
-{
- unsigned long val;
- int i;
- char buf[9];
-
- val = 0;
- for (i = 0; i < 8; i++)
- {
- val <<= 4;
- if (mem[i] >= 'A' && mem[i] <= 'F')
- val = val + mem[i] - 'A' + 10;
- if (mem[i] >= 'a' && mem[i] <= 'f')
- val = val + mem[i] - 'a' + 10;
- if (mem[i] >= '0' && mem[i] <= '9')
- val = val + mem[i] - '0';
- buf[i] = mem[i];
- }
- buf[8] = '\0';
- debuglogs (4, "ascii2hexword() got a 0x%x from %s(%x).\n", val, buf, mem);
- return val;
-}
-
-/*
- * ascii2hexword -- convert a hex value to an ascii number represented by 8
- * digits.
- */
-static void
-hexword2ascii (unsigned char *mem, unsigned long num)
-{
- int i;
- unsigned char ch;
-
- debuglogs (4, "hexword2ascii() converting %x ", num);
- for (i = 7; i >= 0; i--)
- {
- mem[i] = tohex ((num >> 4) & 0xf);
- mem[i] = tohex (num & 0xf);
- num = num >> 4;
- }
- mem[8] = '\0';
- debuglogs (4, "\tto a %s", mem);
-}
-
-/* Convert hex digit A to a number. */
-static int
-from_hex (int a)
-{
- if (a == 0)
- return 0;
-
- debuglogs (4, "from_hex got a 0x%x(%c)\n", a, a);
- if (a >= '0' && a <= '9')
- return a - '0';
- if (a >= 'a' && a <= 'f')
- return a - 'a' + 10;
- if (a >= 'A' && a <= 'F')
- return a - 'A' + 10;
- else
- {
- error ("Reply contains invalid hex digit 0x%x", a);
- }
-}
-
-/* Convert number NIB to a hex digit. */
-static int
-tohex (int nib)
-{
- if (nib < 10)
- return '0' + nib;
- else
- return 'a' + nib - 10;
-}
-
-/*
- * _initialize_remote_monitors -- setup a few addtitional commands that
- * are usually only used by monitors.
- */
-void
-_initialize_remote_monitors (void)
-{
- /* generic monitor command */
- add_com ("monitor", class_obscure, monitor_command,
- "Send a command to the debug monitor.");
-
-}
-
-/*
- * _initialize_array -- do any special init stuff for the target.
- */
-void
-_initialize_array (void)
-{
- init_array_ops ();
- add_target (&array_ops);
-}
projects / binutils-gdb.git / commitdiff