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- /* Remote debugging interface for boot monitors, for GDB.
- Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* This file was derived from remote-eb.c, which did a similar job, but for
- an AMD-29K running EBMON. That file was in turn derived from remote.c
- as mentioned in the following comment (left in for comic relief):
-
- "This is like remote.c but is for a different situation--
- having a PC running os9000 hook up with a unix machine with
- a serial line, and running ctty com2 on the PC. os9000 has a debug
- monitor called ROMBUG running. Not to mention that the PC
- has PC/NFS, so it can access the same executables that gdb can,
- over the net in real time."
-
- In reality, this module talks to a debug monitor called 'ROMBUG', which
- We communicate with ROMBUG via a direct serial line, the network version
- of ROMBUG is not available yet.
- */
-
- #include "defs.h"
- #include "gdbcore.h"
- #include "target.h"
- #include "wait.h"
- #include <varargs.h>
- #include <signal.h>
- #include <string.h>
- #include <sys/types.h>
- #include "command.h"
- #include "serial.h"
- #include "monitor.h"
- #include "remote-utils.h"
- #include "symtab.h"
- #include "symfile.h"
- #include "objfiles.h"
- #include "gdb-stabs.h"
- #include <termio.h>
-
- #ifdef HAVE_TERMIO
- # define TERMINAL struct termios
- #else
- # define TERMINAL struct sgttyb
- #endif
-
- struct monitor_ops *current_monitor;
- struct cmd_list_element *showlist;
- extern struct target_ops rombug_ops; /* Forward declaration */
- extern struct monitor_ops rombug_cmds; /* Forward declaration */
- extern struct cmd_list_element *setlist;
- extern struct cmd_list_element *unsetlist;
- extern int attach_flag;
-
- static void rombug_close();
- static void rombug_fetch_register();
- static void rombug_fetch_registers();
- static void rombug_store_register();
- #if 0
- static int sr_get_debug(); /* flag set by "set remotedebug" */
- #endif
- static int hashmark; /* flag set by "set hash" */
- static int rombug_is_open = 0;
-
- /* FIXME: Replace with sr_get_debug (). */
- #define LOG_FILE "monitor.log"
- FILE *log_file;
- static int monitor_log = 0;
- static int tty_xon = 0;
- static int tty_xoff = 0;
-
- static int timeout = 10;
- static int is_trace_mode = 0;
- /* Descriptor for I/O to remote machine. Initialize it to NULL*/
- static serial_t monitor_desc = NULL;
-
- static CORE_ADDR bufaddr = 0;
- static int buflen = 0;
- static char readbuf[16];
-
- /* Send data to monitor. Works just like printf. */
- static void
- printf_monitor(va_alist)
- va_dcl
- {
- va_list args;
- char *pattern;
- char buf[200];
- int i;
-
- va_start(args);
-
- pattern = va_arg(args, char *);
-
- vsprintf(buf, pattern, args);
-
- if (SERIAL_WRITE(monitor_desc, buf, strlen(buf)))
- fprintf(stderr, "SERIAL_WRITE failed: %s\n", safe_strerror(errno));
- }
-
- /* Read a character from the remote system, doing all the fancy timeout stuff*/
- static int
- readchar(timeout)
- int timeout;
- {
- int c;
-
- c = SERIAL_READCHAR(monitor_desc, timeout);
-
- if (sr_get_debug())
- putchar(c & 0x7f);
-
- if (monitor_log && isascii(c))
- putc(c & 0x7f, log_file);
-
- 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.");
- }
-
- perror_with_name("remote-monitor");
- }
-
- /* 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;
-
- if (sr_get_debug())
- printf ("Expecting \"%s\"\n", string);
-
- immediate_quit = 1;
- while (1)
- {
- c = readchar(timeout);
- if (!isascii (c))
- continue;
- if (c == *p++)
- {
- if (*p == '\0')
- {
- immediate_quit = 0;
- if (sr_get_debug())
- printf ("\nMatched\n");
- return;
- }
- }
- else
- {
- if (!discard)
- {
- fwrite(string, 1, (p - 1) - string, stdout);
- putchar((char)c);
- fflush(stdout);
- }
- p = string;
- }
- }
- }
-
- /* Keep discarding input until we see the ROMBUG prompt.
-
- The convention for dealing with the prompt is that you
- o give your command
- o *then* wait for the prompt.
-
- Thus the last thing that a procedure does with the serial line
- will be an expect_prompt(). Exception: rombug_resume does not
- wait for the prompt, because the terminal is being handed over
- to the inferior. However, the next thing which happens after that
- is a rombug_wait which does wait for the 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;
- {
- if (monitor_log)
- /* This is a convenient place to do this. The idea is to do it often
- enough that we never lose much data if we terminate abnormally. */
- fflush(log_file);
-
- if (is_trace_mode) {
- expect("trace", discard);
- } else {
- expect (PROMPT, discard);
- }
- }
-
- /* Get a hex digit from the remote system & return its value.
- If ignore_space is nonzero, ignore spaces (not newline, tab, etc). */
- static int
- get_hex_digit(ignore_space)
- int ignore_space;
- {
- int ch;
- while (1)
- {
- ch = readchar(timeout);
- 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_space)
- ;
- else
- {
- expect_prompt(1);
- error("Invalid hex digit from remote system.");
- }
- }
- }
-
- /* 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;
- val |= get_hex_digit (0);
- *byt = val;
- }
-
- /* Get N 32-bit words from remote, each preceded by a space,
- and put them in registers starting at REGNO. */
- static void
- get_hex_regs (n, regno)
- int n;
- int regno;
- {
- long val;
- int i;
- unsigned char b;
-
- for (i = 0; i < n; i++)
- {
- int j;
-
- val = 0;
- for (j = 0; j < 4; j++)
- {
- get_hex_byte (&b);
- if (TARGET_BYTE_ORDER == BIG_ENDIAN)
- val = (val << 8) + b;
- else
- val = val + (b << (j*8));
- }
- supply_register (regno++, (char *) &val);
- }
- }
-
- /* This is called not only when we first attach, but also when the
- user types "run" after having attached. */
- static void
- rombug_create_inferior (execfile, args, env)
- char *execfile;
- char *args;
- char **env;
- {
- int entry_pt;
-
- if (args && *args)
- error("Can't pass arguments to remote ROMBUG process");
-
- if (execfile == 0 || exec_bfd == 0)
- error("No exec file specified");
-
- entry_pt = (int) bfd_get_start_address (exec_bfd);
-
- if (monitor_log)
- fputs ("\nIn Create_inferior()", log_file);
-
-
- /* The "process" (board) is already stopped awaiting our commands, and
- the program is already downloaded. We just set its PC and go. */
-
- init_wait_for_inferior ();
- proceed ((CORE_ADDR)entry_pt, TARGET_SIGNAL_DEFAULT, 0);
- }
-
- /* Open a connection to a remote debugger.
- NAME is the filename used for communication. */
-
- static char dev_name[100];
-
- static void
- rombug_open(args, from_tty)
- char *args;
- int from_tty;
- {
- if (args == NULL)
- error ("Use `target RomBug DEVICE-NAME' to use a serial port, or \n\
- `target RomBug HOST-NAME:PORT-NUMBER' to use a network connection.");
-
- target_preopen(from_tty);
-
- if (rombug_is_open)
- unpush_target(&rombug_ops);
-
- strcpy(dev_name, args);
- monitor_desc = SERIAL_OPEN(dev_name);
- if (monitor_desc == NULL)
- perror_with_name(dev_name);
-
- /* if baud rate is set by 'set remotebaud' */
- if (SERIAL_SETBAUDRATE (monitor_desc, sr_get_baud_rate()))
- {
- SERIAL_CLOSE (monitor_desc);
- perror_with_name ("RomBug");
- }
- SERIAL_RAW(monitor_desc);
- if (tty_xon || tty_xoff)
- {
- struct hardware_ttystate { struct termios t;} *tty_s;
-
- tty_s =(struct hardware_ttystate *)SERIAL_GET_TTY_STATE(monitor_desc);
- if (tty_xon) tty_s->t.c_iflag |= IXON;
- if (tty_xoff) tty_s->t.c_iflag |= IXOFF;
- SERIAL_SET_TTY_STATE(monitor_desc, (serial_ttystate) tty_s);
- }
-
- rombug_is_open = 1;
-
- log_file = fopen (LOG_FILE, "w");
- if (log_file == NULL)
- perror_with_name (LOG_FILE);
-
- push_monitor (&rombug_cmds);
- printf_monitor("\r"); /* CR wakes up monitor */
- expect_prompt(1);
- push_target (&rombug_ops);
- attach_flag = 1;
-
- if (from_tty)
- printf("Remote %s connected to %s\n", target_shortname,
- dev_name);
-
- rombug_fetch_registers();
-
- printf_monitor ("ov e \r");
- expect_prompt(1);
- bufaddr = 0;
- buflen = 0;
- }
-
- /*
- * Close out all files and local state before this target loses control.
- */
-
- static void
- rombug_close (quitting)
- int quitting;
- {
- if (rombug_is_open) {
- SERIAL_CLOSE(monitor_desc);
- monitor_desc = NULL;
- rombug_is_open = 0;
- }
-
- if (log_file) {
- if (ferror(log_file))
- fprintf(stderr, "Error writing log file.\n");
- if (fclose(log_file) != 0)
- fprintf(stderr, "Error closing log file.\n");
- log_file = 0;
- }
- }
-
- int
- rombug_link(mod_name, text_reloc)
- char *mod_name;
- CORE_ADDR *text_reloc;
- {
- int i, j;
- unsigned long val;
- unsigned char b;
-
- printf_monitor("l %s \r", mod_name);
- expect_prompt(1);
- printf_monitor(".r \r");
- expect(REG_DELIM, 1);
- for (i=0; i <= 7; i++)
- {
- val = 0;
- for (j = 0; j < 4; j++)
- {
- get_hex_byte(&b);
- val = (val << 8) + b;
- }
- }
- expect_prompt(1);
- *text_reloc = val;
- return 1;
- }
-
- /* Terminate the open connection to the remote debugger.
- Use this when you want to detach and do something else
- with your gdb. */
- static void
- rombug_detach (from_tty)
- int from_tty;
- {
- if (attach_flag) {
- printf_monitor (GO_CMD);
- attach_flag = 0;
- }
- pop_target(); /* calls rombug_close to do the real work */
- if (from_tty)
- printf ("Ending remote %s debugging\n", target_shortname);
- }
-
- /*
- * Tell the remote machine to resume.
- */
- static void
- rombug_resume (pid, step, sig)
- int pid, step;
- enum target_signal sig;
- {
- if (monitor_log)
- fprintf (log_file, "\nIn Resume (step=%d, sig=%d)\n", step, sig);
-
- if (step)
- {
- is_trace_mode = 1;
- printf_monitor (STEP_CMD);
- /* wait for the echo. **
- expect (STEP_CMD, 1);
- */
- }
- else
- {
- printf_monitor (GO_CMD);
- /* swallow the echo. **
- expect (GO_CMD, 1);
- */
- }
- bufaddr = 0;
- buflen= 0;
- }
-
- /*
- * Wait until the remote machine stops, then return,
- * storing status in status just as `wait' would.
- */
-
- static int
- rombug_wait (pid, status)
- int pid;
- struct target_waitstatus *status;
- {
- int old_timeout = timeout;
- struct section_offsets *offs;
- CORE_ADDR addr, pc;
- struct obj_section *obj_sec;
-
- if (monitor_log)
- fputs ("\nIn wait ()", log_file);
-
- status->kind = TARGET_WAITKIND_EXITED;
- status->value.integer = 0;
-
- timeout = -1; /* Don't time out -- user program is running. */
- expect ("eax:", 0); /* output any message before register display */
- expect_prompt(1); /* Wait for prompt, outputting extraneous text */
-
- status->kind = TARGET_WAITKIND_STOPPED;
- status->value.sig = TARGET_SIGNAL_TRAP;
- timeout = old_timeout;
- rombug_fetch_registers();
- bufaddr = 0;
- buflen = 0;
- pc = read_register(PC_REGNUM);
- addr = read_register(DATABASE_REG);
- obj_sec = find_pc_section (pc);
- if (obj_sec != NULL)
- {
- if (obj_sec->objfile != symfile_objfile)
- new_symfile_objfile(obj_sec->objfile, 1, 0);
- offs = ((struct section_offsets *)
- alloca (sizeof (struct section_offsets)
- + (symfile_objfile->num_sections * sizeof (offs->offsets))));
- memcpy (offs, symfile_objfile->section_offsets,
- (sizeof (struct section_offsets) +
- (symfile_objfile->num_sections * sizeof (offs->offsets))));
- ANOFFSET (offs, SECT_OFF_DATA) = addr;
- ANOFFSET (offs, SECT_OFF_BSS) = addr;
-
- objfile_relocate(symfile_objfile, offs);
- }
-
- return 0;
- }
-
- /* Return the name of register number regno in the form input and output by
- monitor. Currently, register_names just happens to contain exactly what
- monitor wants. Lets take advantage of that just as long as possible! */
-
- static char *
- get_reg_name (regno)
- int regno;
- {
- static char buf[50];
- char *p;
- char *b;
-
- b = buf;
-
- if (regno < 0)
- return ("");
- /*
- for (p = reg_names[regno]; *p; p++)
- *b++ = toupper(*p);
- *b = '\000';
- */
- p = (char *)reg_names[regno];
- return p;
- /*
- return buf;
- */
- }
-
- /* read the remote registers into the block regs. */
-
- static void
- rombug_fetch_registers ()
- {
- int regno, j, i;
- long val;
- unsigned char b;
-
- printf_monitor (GET_REG);
- expect("eax:", 1);
- expect("\n", 1);
- get_hex_regs(1, 0);
- get_hex_regs(1, 3);
- get_hex_regs(1, 1);
- get_hex_regs(1, 2);
- get_hex_regs(1, 6);
- get_hex_regs(1, 7);
- get_hex_regs(1, 5);
- get_hex_regs(1, 4);
- for (regno = 8; regno <= 15; regno++)
- {
- expect(REG_DELIM, 1);
- if (regno >= 8 && regno <= 13)
- {
- val = 0;
- for (j = 0; j < 2; j++)
- {
- get_hex_byte (&b);
- if (TARGET_BYTE_ORDER == BIG_ENDIAN)
- val = (val << 8) + b;
- else
- val = val + (b << (j*8));
- }
-
- if (regno == 8) i = 10;
- if (regno >= 9 && regno <= 12) i = regno + 3;
- if (regno == 13) i = 11;
- supply_register (i, (char *) &val);
- }
- else if (regno == 14)
- {
- get_hex_regs(1, PC_REGNUM);
- }
- else if (regno == 15)
- {
- get_hex_regs(1, 9);
- }
- else
- {
- val = 0;
- supply_register(regno, (char *) &val);
- }
- }
- is_trace_mode = 0;
- expect_prompt (1);
- }
-
- /* Fetch register REGNO, or all registers if REGNO is -1.
- Returns errno value. */
- static void
- rombug_fetch_register (regno)
- int regno;
- {
- int val, j;
- unsigned char b;
-
- if (monitor_log) {
- fprintf (log_file, "\nIn Fetch Register (reg=%s)\n", get_reg_name (regno));
- fflush (log_file);
- }
-
- if (regno < 0)
- {
- rombug_fetch_registers ();
- }
- else
- {
- char *name = get_reg_name (regno);
- printf_monitor (GET_REG);
- if (regno >= 10 && regno <= 15)
- {
- expect ("\n", 1);
- expect ("\n", 1);
- expect (name, 1);
- expect (REG_DELIM, 1);
- val = 0;
- for (j = 0; j < 2; j++)
- {
- get_hex_byte (&b);
- if (TARGET_BYTE_ORDER == BIG_ENDIAN)
- val = (val << 8) + b;
- else
- val = val + (b << (j*8));
- }
- supply_register (regno, (char *) &val);
- }
- else if (regno == 8 || regno == 9)
- {
- expect ("\n", 1);
- expect ("\n", 1);
- expect ("\n", 1);
- expect (name, 1);
- expect (REG_DELIM, 1);
- get_hex_regs (1, regno);
- }
- else
- {
- expect (name, 1);
- expect (REG_DELIM, 1);
- expect("\n", 1);
- get_hex_regs(1, 0);
- get_hex_regs(1, 3);
- get_hex_regs(1, 1);
- get_hex_regs(1, 2);
- get_hex_regs(1, 6);
- get_hex_regs(1, 7);
- get_hex_regs(1, 5);
- get_hex_regs(1, 4);
- }
- expect_prompt (1);
- }
- return;
- }
-
- /* Store the remote registers from the contents of the block REGS. */
-
- static void
- rombug_store_registers ()
- {
- int regno;
-
- for (regno = 0; regno <= PC_REGNUM; regno++)
- rombug_store_register(regno);
-
- registers_changed ();
- }
-
- /* Store register REGNO, or all if REGNO == 0.
- return errno value. */
- static void
- rombug_store_register (regno)
- int regno;
- {
- char *name;
-
- if (monitor_log)
- fprintf (log_file, "\nIn Store_register (regno=%d)\n", regno);
-
- if (regno == -1)
- rombug_store_registers ();
- else
- {
- if (sr_get_debug())
- printf ("Setting register %s to 0x%x\n", get_reg_name (regno), read_register (regno));
-
- name = get_reg_name(regno);
- if (name == 0) return;
- printf_monitor (SET_REG, name, read_register (regno));
-
- is_trace_mode = 0;
- expect_prompt (1);
- }
- }
-
- /* 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
- rombug_prepare_to_store ()
- {
- /* Do nothing, since we can store individual regs */
- }
-
- static void
- rombug_files_info ()
- {
- printf ("\tAttached to %s at %d baud.\n",
- dev_name, sr_get_baud_rate());
- }
-
- /* Copy LEN bytes of data from debugger memory at MYADDR
- to inferior's memory at MEMADDR. Returns length moved. */
- static int
- rombug_write_inferior_memory (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- unsigned char *myaddr;
- int len;
- {
- int i;
- char buf[10];
-
- if (monitor_log)
- fprintf (log_file, "\nIn Write_inferior_memory (memaddr=%x, len=%d)\n", memaddr, len);
-
- printf_monitor (MEM_SET_CMD, memaddr);
- for (i = 0; i < len; i++)
- {
- expect (CMD_DELIM, 1);
- printf_monitor ("%x \r", myaddr[i]);
- if (sr_get_debug())
- printf ("\nSet 0x%x to 0x%x\n", memaddr + i, myaddr[i]);
- }
- expect (CMD_DELIM, 1);
- if (CMD_END)
- printf_monitor (CMD_END);
- is_trace_mode = 0;
- expect_prompt (1);
-
- bufaddr = 0;
- buflen = 0;
- return len;
- }
-
- /* Read LEN bytes from inferior memory at MEMADDR. Put the result
- at debugger address MYADDR. Returns length moved. */
- static int
- rombug_read_inferior_memory(memaddr, myaddr, len)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- {
- int i, j;
-
- /* Number of bytes read so far. */
- int count;
-
- /* Starting address of this pass. */
- unsigned long startaddr;
-
- /* Number of bytes to read in this pass. */
- int len_this_pass;
-
- if (monitor_log)
- fprintf (log_file, "\nIn Read_inferior_memory (memaddr=%x, len=%d)\n", memaddr, 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
- rombug_read_bytes (CORE_ADDR_MAX - 4, foo, 4)
- works--it never adds len To memaddr and gets 0. */
- /* However, something like
- rombug_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;
- }
- if (bufaddr <= memaddr && (memaddr+len) <= (bufaddr+buflen))
- {
- memcpy(myaddr, &readbuf[memaddr-bufaddr], len);
- return len;
- }
-
- startaddr = memaddr;
- count = 0;
- while (count < len)
- {
- len_this_pass = 16;
- if ((startaddr % 16) != 0)
- len_this_pass -= startaddr % 16;
- if (len_this_pass > (len - count))
- len_this_pass = (len - count);
- if (sr_get_debug())
- printf ("\nDisplay %d bytes at %x\n", len_this_pass, startaddr);
-
- printf_monitor (MEM_DIS_CMD, startaddr, 8);
- expect ("- ", 1);
- for (i = 0; i < 16; i++)
- {
- get_hex_byte (&readbuf[i]);
- }
- bufaddr = startaddr;
- buflen = 16;
- memcpy(&myaddr[count], readbuf, len_this_pass);
- count += len_this_pass;
- startaddr += len_this_pass;
- expect(CMD_DELIM, 1);
- }
- if (CMD_END)
- printf_monitor (CMD_END);
- is_trace_mode = 0;
- expect_prompt (1);
-
- return len;
- }
-
- /* FIXME-someday! merge these two. */
- static int
- rombug_xfer_inferior_memory (memaddr, myaddr, len, write, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
- struct target_ops *target; /* ignored */
- {
- if (write)
- return rombug_write_inferior_memory (memaddr, myaddr, len);
- else
- return rombug_read_inferior_memory (memaddr, myaddr, len);
- }
-
- static void
- rombug_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
- rombug_mourn_inferior ()
- {
- remove_breakpoints ();
- generic_mourn_inferior (); /* Do all the proper things now */
- }
-
- #define MAX_MONITOR_BREAKPOINTS 16
-
- extern int memory_breakpoint_size;
- static CORE_ADDR breakaddr[MAX_MONITOR_BREAKPOINTS] = {0};
-
- static int
- rombug_insert_breakpoint (addr, shadow)
- CORE_ADDR addr;
- char *shadow;
- {
- int i;
-
- if (monitor_log)
- fprintf (log_file, "\nIn Insert_breakpoint (addr=%x)\n", addr);
-
- for (i = 0; i <= MAX_MONITOR_BREAKPOINTS; i++)
- if (breakaddr[i] == 0)
- {
- breakaddr[i] = addr;
- if (sr_get_debug())
- printf ("Breakpoint at %x\n", addr);
- rombug_read_inferior_memory(addr, shadow, memory_breakpoint_size);
- printf_monitor(SET_BREAK_CMD, addr);
- is_trace_mode = 0;
- 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
- rombug_remove_breakpoint (addr, shadow)
- CORE_ADDR addr;
- char *shadow;
- {
- int i;
-
- if (monitor_log)
- fprintf (log_file, "\nIn Remove_breakpoint (addr=%x)\n", addr);
-
- for (i = 0; i < MAX_MONITOR_BREAKPOINTS; i++)
- if (breakaddr[i] == addr)
- {
- breakaddr[i] = 0;
- printf_monitor(CLR_BREAK_CMD, addr);
- is_trace_mode = 0;
- expect_prompt(1);
- return 0;
- }
-
- fprintf(stderr, "Can't find breakpoint associated with 0x%x\n", addr);
- return 1;
- }
-
- /* Load a file. This is usually an srecord, which is ascii. No
- protocol, just sent line by line. */
-
- #define DOWNLOAD_LINE_SIZE 100
- static void
- rombug_load (arg)
- char *arg;
- {
- /* this part comment out for os9* */
- #if 0
- FILE *download;
- char buf[DOWNLOAD_LINE_SIZE];
- int i, bytes_read;
-
- if (sr_get_debug())
- printf ("Loading %s to monitor\n", arg);
-
- download = fopen (arg, "r");
- if (download == NULL)
- {
- error (sprintf (buf, "%s Does not exist", arg));
- return;
- }
-
- printf_monitor (LOAD_CMD);
- /* expect ("Waiting for S-records from host... ", 1); */
-
- while (!feof (download))
- {
- bytes_read = fread (buf, sizeof (char), DOWNLOAD_LINE_SIZE, download);
- if (hashmark)
- {
- putchar ('.');
- fflush (stdout);
- }
-
- if (SERIAL_WRITE(monitor_desc, buf, bytes_read)) {
- fprintf(stderr, "SERIAL_WRITE failed: (while downloading) %s\n", safe_strerror(errno));
- break;
- }
- i = 0;
- while (i++ <=200000) {} ; /* Ugly HACK, probably needs flow control */
- if (bytes_read < DOWNLOAD_LINE_SIZE)
- {
- if (!feof (download))
- error ("Only read %d bytes\n", bytes_read);
- break;
- }
- }
-
- if (hashmark)
- {
- putchar ('\n');
- }
- if (!feof (download))
- error ("Never got EOF while downloading");
- fclose (download);
- #endif 0
- }
-
- /* Put a command string, in args, out to MONITOR.
- Output from MONITOR is placed on the users terminal until the prompt
- is seen. */
-
- static void
- rombug_command (args, fromtty)
- char *args;
- int fromtty;
- {
- if (monitor_desc == NULL)
- error("monitor target not open.");
-
- if (monitor_log)
- fprintf (log_file, "\nIn command (args=%s)\n", args);
-
- if (!args)
- error("Missing command.");
-
- printf_monitor("%s\r", args);
- expect_prompt(0);
- }
-
- #if 0
- /* Connect the user directly to MONITOR. This command acts just like the
- 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
-
- static struct ttystate ttystate;
-
- static void
- cleanup_tty()
- { printf("\r\n[Exiting connect mode]\r\n");
- /*SERIAL_RESTORE(0, &ttystate);*/
- }
-
- static void
- connect_command (args, fromtty)
- char *args;
- int fromtty;
- {
- fd_set readfds;
- int numfds;
- int c;
- char cur_esc = 0;
-
- dont_repeat();
-
- if (monitor_desc == NULL)
- error("monitor target not open.");
-
- if (args)
- fprintf("This command takes no args. They have been ignored.\n");
-
- printf("[Entering connect mode. Use ~. or ~^D to escape]\n");
-
- serial_raw(0, &ttystate);
-
- make_cleanup(cleanup_tty, 0);
-
- FD_ZERO(&readfds);
-
- while (1)
- {
- do
- {
- FD_SET(0, &readfds);
- FD_SET(monitor_desc, &readfds);
- numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0);
- }
- while (numfds == 0);
-
- if (numfds < 0)
- perror_with_name("select");
-
- if (FD_ISSET(0, &readfds))
- { /* tty input, send to monitor */
- c = getchar();
- if (c < 0)
- perror_with_name("connect");
-
- printf_monitor("%c", c);
- switch (cur_esc)
- {
- case 0:
- if (c == '\r')
- cur_esc = c;
- break;
- case '\r':
- if (c == '~')
- cur_esc = c;
- else
- cur_esc = 0;
- break;
- case '~':
- if (c == '.' || c == '\004')
- return;
- else
- cur_esc = 0;
- }
- }
-
- if (FD_ISSET(monitor_desc, &readfds))
- {
- while (1)
- {
- c = readchar(0);
- if (c < 0)
- break;
- putchar(c);
- }
- fflush(stdout);
- }
- }
- }
- #endif
-
- /*
- * Define the monitor command strings. Since these are passed directly
- * through to a printf style function, we need can include formatting
- * strings. We also need a CR or LF on the end.
- */
- struct monitor_ops rombug_cmds = {
- "g \r", /* execute or usually GO command */
- "g \r", /* continue command */
- "t \r", /* single step */
- "b %x\r", /* set a breakpoint */
- "k %x\r", /* clear a breakpoint */
- "c %x\r", /* set memory to a value */
- "d %x %d\r", /* display memory */
- "$%08X", /* prompt memory commands use */
- ".%s %x\r", /* set a register */
- ":", /* delimiter between registers */
- ". \r", /* read a register */
- "mf \r", /* download command */
- "RomBug: ", /* monitor command prompt */
- ": ", /* end-of-command delimitor */
- ".\r" /* optional command terminator */
- };
-
- struct target_ops rombug_ops = {
- "rombug",
- "Microware's ROMBUG debug monitor",
- "Use a remote computer running the ROMBUG debug monitor.\n\
- Specify the serial device it is connected to (e.g. /dev/ttya).",
- rombug_open,
- rombug_close,
- 0,
- rombug_detach,
- rombug_resume,
- rombug_wait,
- rombug_fetch_register,
- rombug_store_register,
- rombug_prepare_to_store,
- rombug_xfer_inferior_memory,
- rombug_files_info,
- rombug_insert_breakpoint,
- rombug_remove_breakpoint, /* Breakpoints */
- 0,
- 0,
- 0,
- 0,
- 0, /* Terminal handling */
- rombug_kill,
- rombug_load, /* load */
- rombug_link, /* lookup_symbol */
- rombug_create_inferior,
- rombug_mourn_inferior,
- 0, /* can_run */
- 0, /* notice_signals */
- 0, /* to_stop */
- process_stratum,
- 0, /* next */
- 1,
- 1,
- 1,
- 1,
- 1, /* has execution */
- 0,
- 0, /* Section pointers */
- OPS_MAGIC, /* Always the last thing */
- };
-
- void
- _initialize_remote_os9k ()
- {
- add_target (&rombug_ops);
-
- add_show_from_set (
- add_set_cmd ("hash", no_class, var_boolean, (char *)&hashmark,
- "Set display of activity while downloading a file.\nWhen enabled, a period \'.\' is displayed.",
- &setlist),
- &showlist);
-
- add_show_from_set (
- add_set_cmd ("timeout", no_class, var_zinteger,
- (char *) &timeout,
- "Set timeout in seconds for remote MIPS serial I/O.",
- &setlist),
- &showlist);
-
- add_show_from_set (
- add_set_cmd ("remotelog", no_class, var_zinteger,
- (char *) &monitor_log,
- "Set monitor activity log on(=1) or off(=0).",
- &setlist),
- &showlist);
-
- add_show_from_set (
- add_set_cmd ("remotexon", no_class, var_zinteger,
- (char *) &tty_xon,
- "Set remote tty line XON control",
- &setlist),
- &showlist);
-
- add_show_from_set (
- add_set_cmd ("remotexoff", no_class, var_zinteger,
- (char *) &tty_xoff,
- "Set remote tty line XOFF control",
- &setlist),
- &showlist);
-
- add_com ("rombug <command>", class_obscure, rombug_command,
- "Send a command to the debug monitor.");
- #if 0
- add_com ("connect", class_obscure, connect_command,
- "Connect the terminal directly up to a serial based command monitor.\nUse <CR>~. or <CR>~^D to break out.");
- #endif
- }
-