From 071ea11e85eb9d529cc5eb3d35f6247466a21b99 Mon Sep 17 00:00:00 2001 From: Stan Shebs Date: Fri, 16 Apr 1999 01:34:07 +0000 Subject: Initial creation of sourceware repository --- gdb/remote-array.c | 1497 ---------------------------------------------------- 1 file changed, 1497 deletions(-) delete mode 100644 gdb/remote-array.c (limited to 'gdb/remote-array.c') diff --git a/gdb/remote-array.c b/gdb/remote-array.c deleted file mode 100644 index 624871c..0000000 --- a/gdb/remote-array.c +++ /dev/null @@ -1,1497 +0,0 @@ -/* 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" -#ifdef ANSI_PROTOTYPES -#include -#else -#include -#endif -#include -#include -#include -#include "gdb_string.h" -#include "command.h" -#include "serial.h" -#include "monitor.h" -#include "remote-utils.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(); - -extern char *version; - -#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 -#ifdef ANSI_PROTOTYPES -printf_monitor(char *pattern, ...) -#else -printf_monitor(va_alist) - va_dcl -#endif -{ - va_list args; - char buf[PBUFSIZ]; - int i; - -#ifdef ANSI_PROTOTYPES - va_start(args, pattern); -#else - char *pattern; - va_start(args); - pattern = va_arg(args, char *); -#endif - - 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 -#ifdef ANSI_PROTOTYPES -debuglogs(int level, char *pattern, ...) -#else -debuglogs(va_alist) - va_dcl -#endif -{ - va_list args; - char *p; - unsigned char buf[PBUFSIZ]; - char newbuf[PBUFSIZ]; - int i; - -#ifdef ANSI_PROTOTYPES - va_start(args, pattern); -#else - char *pattern; - int level; - va_start(args); - level = va_arg(args, int); /* get the debug level */ - pattern = va_arg(args, char *); /* get the printf style pattern */ -#endif - - 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); - 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%08x,%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 %x\n", 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%x\n", 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 - * is encapsulated for transmission in the form: - * - * $ # CSUM1 CSUM2 - * - * must be ASCII alphanumeric and cannot include characters - * '$' or '#'. If starts with two characters followed by - * ':', then the existing stubs interpret this as a sequence number. - * - * CSUM1 and CSUM2 are ascii hex representation of an 8-bit - * checksum of , the most significant nibble is sent first. - * the hex digits 0-9,a-f are used. - * - */ -static void -make_gdb_packet (buf, data) - char *buf, *data; -{ - int i; - unsigned char csum = 0; - int cnt; - char *p; - - debuglogs (3, "make_gdb_packet(%s)\n", data); - cnt = strlen (data); - if (cnt > PBUFSIZ) - error ("make_gdb_packet(): to much data\n"); - - /* start with the packet header */ - p = buf; - *p++ = '$'; - - /* 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); -} -- cgit v1.1