| /* Remote debugging interface for Array Tech RAID controller.. |
| Copyright 90, 91, 92, 93, 94, 1995, 1998 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 "wait.h" |
| #include <ctype.h> |
| #include <signal.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" |
| |
| extern int baud_rate; |
| |
| #define ARRAY_PROMPT ">> " |
| |
| #define SWAP_TARGET_AND_HOST(buffer,len) \ |
| do \ |
| { \ |
| if (TARGET_BYTE_ORDER != HOST_BYTE_ORDER) \ |
| { \ |
| char tmp; \ |
| char *p = (char *)(buffer); \ |
| char *q = ((char *)(buffer)) + len - 1; \ |
| for (; p < q; p++, q--) \ |
| { \ |
| tmp = *q; \ |
| *q = *p; \ |
| *p = tmp; \ |
| } \ |
| } \ |
| } \ |
| while (0) |
| |
| static void debuglogs PARAMS ((int, char *,...)); |
| static void array_open (); |
| static void array_close (); |
| static void array_detach (); |
| static void array_attach (); |
| static void array_resume (); |
| 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 int array_wait (); |
| 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 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. |
| */ |
| serial_t 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_attach = NULL; |
| array_ops.to_post_attach = NULL; |
| array_ops.to_require_attach = NULL; |
| array_ops.to_detach = array_detach; |
| array_ops.to_require_detach = NULL; |
| array_ops.to_resume = array_resume; |
| array_ops.to_wait = array_wait; |
| array_ops.to_post_wait = NULL; |
| 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_terminal_init = 0; |
| array_ops.to_terminal_inferior = 0; |
| array_ops.to_terminal_ours_for_output = 0; |
| array_ops.to_terminal_ours = 0; |
| array_ops.to_terminal_info = 0; |
| array_ops.to_kill = array_kill; |
| array_ops.to_load = 0; |
| array_ops.to_lookup_symbol = 0; |
| array_ops.to_create_inferior = array_create_inferior; |
| array_ops.to_post_startup_inferior = NULL; |
| array_ops.to_acknowledge_created_inferior = NULL; |
| array_ops.to_clone_and_follow_inferior = NULL; |
| array_ops.to_post_follow_inferior_by_clone = NULL; |
| array_ops.to_insert_fork_catchpoint = NULL; |
| array_ops.to_remove_fork_catchpoint = NULL; |
| array_ops.to_insert_vfork_catchpoint = NULL; |
| array_ops.to_remove_vfork_catchpoint = NULL; |
| array_ops.to_has_forked = NULL; |
| array_ops.to_has_vforked = NULL; |
| array_ops.to_can_follow_vfork_prior_to_exec = NULL; |
| array_ops.to_post_follow_vfork = NULL; |
| array_ops.to_insert_exec_catchpoint = NULL; |
| array_ops.to_remove_exec_catchpoint = NULL; |
| array_ops.to_has_execd = NULL; |
| array_ops.to_reported_exec_events_per_exec_call = NULL; |
| array_ops.to_has_exited = NULL; |
| array_ops.to_mourn_inferior = array_mourn_inferior; |
| array_ops.to_can_run = 0; |
| array_ops.to_notice_signals = 0; |
| array_ops.to_thread_alive = 0; |
| array_ops.to_stop = 0; |
| array_ops.to_pid_to_exec_file = NULL; |
| array_ops.to_core_file_to_sym_file = NULL; |
| array_ops.to_stratum = process_stratum; |
| array_ops.DONT_USE = 0; |
| 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_sections = 0; |
| array_ops.to_sections_end = 0; |
| 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 (stderr, "SERIAL_WRITE failed: %s\n", safe_strerror (errno)); |
| } |
| /* |
| * write_monitor -- send raw data to monitor. |
| */ |
| static void |
| write_monitor (data, len) |
| char data[]; |
| int len; |
| { |
| if (SERIAL_WRITE (array_desc, data, len)) |
| fprintf (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 (timeout) |
| 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 (string, discard) |
| char *string; |
| int discard; |
| { |
| char *p = string; |
| int c; |
| |
| |
| debuglogs (1, "Expecting \"%s\".", string); |
| |
| immediate_quit = 1; |
| while (1) |
| { |
| c = readchar (timeout); |
| if (!isascii (c)) |
| continue; |
| if (c == *p++) |
| { |
| if (*p == '\0') |
| { |
| immediate_quit = 0; |
| 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 (discard) |
| int discard; |
| { |
| expect (ARRAY_PROMPT, discard); |
| } |
| |
| /* |
| * junk -- ignore junk characters. Returns a 1 if junk, 0 otherwise |
| */ |
| static int |
| junk (ch) |
| 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 (ignore) |
| 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 (byt) |
| 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 () |
| { |
| long val, newval; |
| int i; |
| |
| val = 0; |
| |
| #if 0 |
| if (HOST_BYTE_ORDER == BIG_ENDIAN) |
| { |
| #endif |
| for (i = 0; i < 8; i++) |
| val = (val << 4) + get_hex_digit (i == 0); |
| #if 0 |
| } |
| else |
| { |
| for (i = 7; i >= 0; i--) |
| val = (val << 4) + get_hex_digit (i == 0); |
| } |
| #endif |
| |
| debuglogs (4, "get_hex_word() got a 0x%x for a %s host.", val, (HOST_BYTE_ORDER == BIG_ENDIAN) ? "big endian" : "little endian"); |
| |
| 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 (execfile, args, env) |
| 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 (args, name, from_tty) |
| 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 (quitting) |
| 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 (from_tty) |
| 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 (args, from_tty) |
| 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 (pid, step, sig) |
| int pid, 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 int |
| array_wait (pid, status) |
| int pid; |
| struct target_waitstatus *status; |
| { |
| int old_timeout = timeout; |
| int result, i; |
| char c; |
| serial_t 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 0; |
| } |
| |
| /* |
| * array_fetch_registers -- read the remote registers into the |
| * block regs. |
| */ |
| static void |
| array_fetch_registers (ignored) |
| int ignored; |
| { |
| int regno, i; |
| char *p; |
| unsigned char packet[PBUFSIZ]; |
| char regs[REGISTER_BYTES]; |
| |
| debuglogs (1, "array_fetch_registers (ignored=%d)\n", ignored); |
| |
| memset (packet, 0, PBUFSIZ); |
| /* Unimplemented registers read as all bits zero. */ |
| memset (regs, 0, REGISTER_BYTES); |
| 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 */ |
| i = ascii2hexword (packet + (regno * 8)); |
| debuglogs (5, "Adding register %d = %x\n", regno, i); |
| SWAP_TARGET_AND_HOST (&i, 4); |
| supply_register (regno, (char *) &i); |
| } |
| } |
| |
| /* |
| * This is unused by targets like this one that use a |
| * protocol based on GDB's remote protocol. |
| */ |
| static void |
| array_fetch_register (ignored) |
| int ignored; |
| { |
| array_fetch_registers (); |
| } |
| |
| /* |
| * Get all the registers from the targets. They come back in a large array. |
| */ |
| static void |
| array_store_registers (ignored) |
| 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 (ignored) |
| int ignored; |
| { |
| array_store_registers (); |
| } |
| |
| /* 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 () |
| { |
| /* Do nothing, since we can store individual regs */ |
| } |
| |
| static void |
| array_files_info () |
| { |
| 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 (memaddr, myaddr, len) |
| 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 (memaddr, myaddr, len) |
| 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); |
| } |
| |
| /* FIXME-someday! merge these two. */ |
| static int |
| array_xfer_memory (memaddr, myaddr, len, write, target) |
| CORE_ADDR memaddr; |
| char *myaddr; |
| int len; |
| int write; |
| struct target_ops *target; /* ignored */ |
| { |
| if (write) |
| return array_write_inferior_memory (memaddr, myaddr, len); |
| else |
| return array_read_inferior_memory (memaddr, myaddr, len); |
| } |
| |
| static void |
| array_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 |
| array_mourn_inferior () |
| { |
| 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 (addr, shadow) |
| 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 (stderr, "Too many breakpoints (> 16) for monitor\n"); |
| return 1; |
| } |
| |
| /* |
| * _remove_breakpoint -- Tell the monitor to remove a breakpoint |
| */ |
| static int |
| array_remove_breakpoint (addr, shadow) |
| 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 (stderr, "Can't find breakpoint associated with 0x%s\n", |
| paddr_nz (addr)); |
| return 1; |
| } |
| |
| static void |
| array_stop () |
| { |
| 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 (args, fromtty) |
| 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 |
| * '$' or '#'. If <data> starts with two characters followed by |
| * ':', then the existing stubs interpret this as a sequence number. |
| * |
| * CSUM1 and CSUM2 are ascii hex representation of an 8-bit |
| * checksum of <data>, the most significant nibble is sent first. |
| * the hex digits 0-9,a-f are used. |
| * |
| */ |
| static void |
| make_gdb_packet (buf, data) |
| char *buf, *data; |
| { |
| int i; |
| unsigned char csum = 0; |
| int cnt; |
| char *p; |
| |
| debuglogs (3, "make_gdb_packet(%s)\n", data); |
| cnt = strlen (data); |
| if (cnt > PBUFSIZ) |
| error ("make_gdb_packet(): to much data\n"); |
| |
| /* start with the packet header */ |
| p = buf; |
| *p++ = '$'; |
| |
| /* 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 (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 (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 (mem) |
| 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 (mem, num) |
| 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 (a) |
| 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 (nib) |
| 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 () |
| { |
| /* 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 () |
| { |
| init_array_ops (); |
| add_target (&array_ops); |
| } |