--- /dev/null
+/* Remote debugging interface for AMD 29000 EBMON on IBM PC, for GDB.
+ Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
+ Contributed by Cygnus Support. Written by Jim Kingdon for Cygnus.
+
+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 is like remote.c but is for an esoteric situation--
+ having a 29k board in a PC hooked up to a unix machine with
+ a serial line, and running ctty com1 on the PC, through which
+ the unix machine can run ebmon. 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. */
+
+#define TM_FILE_OVERRIDE
+#include "defs.h"
+#include <string.h>
+#include "tm-29k.h"
+
+#include "inferior.h"
+#include "wait.h"
+#include "value.h"
+#include <ctype.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <errno.h>
+#include "terminal.h"
+#include "target.h"
+#include "gdbcore.h"
+
+extern struct target_ops eb_ops; /* Forward declaration */
+
+static void eb_close();
+
+#define LOG_FILE "eb.log"
+#if defined (LOG_FILE)
+FILE *log_file;
+#endif
+
+static int timeout = 24;
+
+/* Descriptor for I/O to remote machine. Initialize it to -1 so that
+ eb_open knows that we don't have a file open when the program
+ starts. */
+int eb_desc = -1;
+
+/* stream which is fdopen'd from eb_desc. Only valid when
+ eb_desc != -1. */
+FILE *eb_stream;
+
+/* Read a character from the remote system, doing all the fancy
+ timeout stuff. */
+static int
+readchar ()
+{
+ char buf;
+
+ buf = '\0';
+#ifdef HAVE_TERMIO
+ /* termio does the timeout for us. */
+ read (eb_desc, &buf, 1);
+#else
+ alarm (timeout);
+ if (read (eb_desc, &buf, 1) < 0)
+ {
+ if (errno == EINTR)
+ error ("Timeout reading from remote system.");
+ else
+ perror_with_name ("remote");
+ }
+ alarm (0);
+#endif
+
+ if (buf == '\0')
+ error ("Timeout reading from remote system.");
+#if defined (LOG_FILE)
+ putc (buf & 0x7f, log_file);
+#endif
+ return buf & 0x7f;
+}
+
+/* Keep discarding input from the remote system, until STRING is found.
+ Let the user break out immediately. */
+static void
+expect (string)
+ char *string;
+{
+ char *p = string;
+
+ immediate_quit = 1;
+ while (1)
+ {
+ if (readchar() == *p)
+ {
+ p++;
+ if (*p == '\0')
+ {
+ immediate_quit = 0;
+ return;
+ }
+ }
+ else
+ p = string;
+ }
+}
+
+/* Keep discarding input until we see the ebmon 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: eb_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 eb_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 ()
+{
+#if defined (LOG_FILE)
+ /* 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);
+#endif
+ expect ("\n# ");
+}
+
+/* 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 ();
+ 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 ();
+ error ("Invalid hex digit from remote system.");
+ }
+ }
+}
+
+/* Get a byte from eb_desc 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;
+
+ for (i = 0; i < n; i++)
+ {
+ int j;
+
+ val = 0;
+ for (j = 0; j < 8; j++)
+ val = (val << 4) + get_hex_digit (j == 0);
+ supply_register (regno++, &val);
+ }
+}
+
+/* Called when SIGALRM signal sent due to alarm() timeout. */
+#ifndef HAVE_TERMIO
+
+#ifndef __STDC__
+#define volatile /**/
+#endif
+volatile int n_alarms;
+
+void
+eb_timer ()
+{
+#if 0
+ if (kiodebug)
+ printf ("eb_timer called\n");
+#endif
+ n_alarms++;
+}
+#endif
+
+/* malloc'd name of the program on the remote system. */
+static char *prog_name = NULL;
+
+/* Nonzero if we have loaded the file ("yc") and not yet issued a "gi"
+ command. "gi" is supposed to happen exactly once for each "yc". */
+static int need_gi = 0;
+
+/* Number of SIGTRAPs we need to simulate. That is, the next
+ NEED_ARTIFICIAL_TRAP calls to eb_wait should just return
+ SIGTRAP without actually waiting for anything. */
+
+static int need_artificial_trap = 0;
+
+/* This is called not only when we first attach, but also when the
+ user types "run" after having attached. */
+static void
+eb_create_inferior (execfile, args, env)
+ char *execfile;
+ char *args;
+ char **env;
+{
+ int entry_pt;
+
+ if (args && *args)
+ error ("Can't pass arguments to remote EBMON process");
+
+ if (execfile == 0 || exec_bfd == 0)
+ error ("No exec file specified");
+
+ entry_pt = (int) bfd_get_start_address (exec_bfd);
+
+#ifdef CREATE_INFERIOR_HOOK
+ CREATE_INFERIOR_HOOK (0); /* No process-ID */
+#endif
+
+ {
+ /* OK, now read in the file. Y=read, C=COFF, D=no symbols
+ 0=start address, %s=filename. */
+
+ fprintf (eb_stream, "YC D,0:%s", prog_name);
+
+ if (args != NULL)
+ fprintf(eb_stream, " %s", args);
+
+ fprintf (eb_stream, "\n");
+ fflush (eb_stream);
+
+ expect_prompt ();
+
+ need_gi = 1;
+ }
+
+/* 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? */
+ proceed ((CORE_ADDR)entry_pt, -1, 0); /* Let 'er rip... */
+}
+
+/* Translate baud rates from integers to damn B_codes. Unix should
+ have outgrown this crap years ago, but even POSIX wouldn't buck it. */
+
+#ifndef B19200
+#define B19200 EXTA
+#endif
+#ifndef B38400
+#define B38400 EXTB
+#endif
+
+struct {int rate, damn_b;} baudtab[] = {
+ {0, B0},
+ {50, B50},
+ {75, B75},
+ {110, B110},
+ {134, B134},
+ {150, B150},
+ {200, B200},
+ {300, B300},
+ {600, B600},
+ {1200, B1200},
+ {1800, B1800},
+ {2400, B2400},
+ {4800, B4800},
+ {9600, B9600},
+ {19200, B19200},
+ {38400, B38400},
+ {-1, -1},
+};
+
+int damn_b (rate)
+ int rate;
+{
+ int i;
+
+ for (i = 0; baudtab[i].rate != -1; i++)
+ if (rate == baudtab[i].rate) return baudtab[i].damn_b;
+ return B38400; /* Random */
+}
+
+
+/* Open a connection to a remote debugger.
+ NAME is the filename used for communication, then a space,
+ then the name of the program as we should name it to EBMON. */
+
+static int baudrate = 9600;
+static char *dev_name;
+void
+eb_open (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ TERMINAL sg;
+
+ char *p;
+
+ target_preopen (from_tty);
+
+ /* Find the first whitespace character, it separates dev_name from
+ prog_name. */
+ if (name == 0)
+ goto erroid;
+
+ for (p = name;
+ *p != '\0' && !isspace (*p); p++)
+ ;
+ if (*p == '\0')
+erroid:
+ error ("\
+Please include the name of the device for the serial port,\n\
+the baud rate, and the name of the program to run on the remote system.");
+ dev_name = alloca (p - name + 1);
+ strncpy (dev_name, name, p - name);
+ dev_name[p - name] = '\0';
+
+ /* Skip over the whitespace after dev_name */
+ for (; isspace (*p); p++)
+ /*EMPTY*/;
+
+ if (1 != sscanf (p, "%d ", &baudrate))
+ goto erroid;
+
+ /* Skip the number and then the spaces */
+ for (; isdigit (*p); p++)
+ /*EMPTY*/;
+ for (; isspace (*p); p++)
+ /*EMPTY*/;
+
+ if (prog_name != NULL)
+ free (prog_name);
+ prog_name = savestring (p, strlen (p));
+
+ eb_close (0);
+
+ eb_desc = open (dev_name, O_RDWR);
+ if (eb_desc < 0)
+ perror_with_name (dev_name);
+ ioctl (eb_desc, TIOCGETP, &sg);
+#ifdef HAVE_TERMIO
+ sg.c_cc[VMIN] = 0; /* read with timeout. */
+ sg.c_cc[VTIME] = timeout * 10;
+ sg.c_lflag &= ~(ICANON | ECHO);
+ sg.c_cflag = (sg.c_cflag & ~CBAUD) | damn_b (baudrate);
+#else
+ sg.sg_ispeed = damn_b (baudrate);
+ sg.sg_ospeed = damn_b (baudrate);
+ sg.sg_flags |= RAW | ANYP;
+ sg.sg_flags &= ~ECHO;
+#endif
+
+ ioctl (eb_desc, TIOCSETP, &sg);
+ eb_stream = fdopen (eb_desc, "r+");
+
+ push_target (&eb_ops);
+ if (from_tty)
+ printf ("Remote %s debugging %s using %s\n", target_shortname,
+ prog_name, dev_name);
+
+#ifndef HAVE_TERMIO
+#ifndef NO_SIGINTERRUPT
+ /* Cause SIGALRM's to make reads fail with EINTR instead of resuming
+ the read. */
+ if (siginterrupt (SIGALRM, 1) != 0)
+ perror ("eb_open: error in siginterrupt");
+#endif
+
+ /* Set up read timeout timer. */
+ if ((void (*)) signal (SIGALRM, eb_timer) == (void (*)) -1)
+ perror ("eb_open: error in signal");
+#endif
+
+#if defined (LOG_FILE)
+ log_file = fopen (LOG_FILE, "w");
+ if (log_file == NULL)
+ perror_with_name (LOG_FILE);
+#endif
+
+ /* Hello? Are you there? */
+ write (eb_desc, "\n", 1);
+
+ expect_prompt ();
+}
+
+/* Close out all files and local state before this target loses control. */
+
+static void
+eb_close (quitting)
+ int quitting;
+{
+
+ /* Due to a bug in Unix, fclose closes not only the stdio stream,
+ but also the file descriptor. So we don't actually close
+ eb_desc. */
+ if (eb_stream)
+ fclose (eb_stream); /* This also closes eb_desc */
+ if (eb_desc >= 0)
+ /* close (eb_desc); */
+
+ /* Do not try to close eb_desc again, later in the program. */
+ eb_stream = NULL;
+ eb_desc = -1;
+
+#if defined (LOG_FILE)
+ if (log_file) {
+ if (ferror (log_file))
+ printf ("Error writing log file.\n");
+ if (fclose (log_file) != 0)
+ printf ("Error closing log file.\n");
+ }
+#endif
+}
+
+/* Terminate the open connection to the remote debugger.
+ Use this when you want to detach and do something else
+ with your gdb. */
+void
+eb_detach (from_tty)
+ int from_tty;
+{
+ pop_target(); /* calls eb_close to do the real work */
+ if (from_tty)
+ printf ("Ending remote %s debugging\n", target_shortname);
+}
+
+/* Tell the remote machine to resume. */
+
+void
+eb_resume (step, sig)
+ int step, sig;
+{
+ if (step)
+ {
+ write (eb_desc, "t 1,s\n", 6);
+ /* Wait for the echo. */
+ expect ("t 1,s\r");
+ /* Then comes a line containing the instruction we stepped to. */
+ expect ("\n@");
+ /* Then we get the prompt. */
+ expect_prompt ();
+
+ /* Force the next eb_wait to return a trap. Not doing anything
+ about I/O from the target means that the user has to type
+ "continue" to see any. This should be fixed. */
+ need_artificial_trap = 1;
+ }
+ else
+ {
+ if (need_gi)
+ {
+ need_gi = 0;
+ write (eb_desc, "gi\n", 3);
+
+ /* Swallow the echo of "gi". */
+ expect ("gi\r");
+ }
+ else
+ {
+ write (eb_desc, "GR\n", 3);
+ /* Swallow the echo. */
+ expect ("GR\r");
+ }
+ }
+}
+
+/* Wait until the remote machine stops, then return,
+ storing status in STATUS just as `wait' would. */
+
+int
+eb_wait (status)
+ WAITTYPE *status;
+{
+ /* Strings to look for. '?' means match any single character.
+ Note that with the algorithm we use, the initial character
+ of the string cannot recur in the string, or we will not
+ find some cases of the string in the input. */
+
+ static char bpt[] = "Invalid interrupt taken - #0x50 - ";
+ /* It would be tempting to look for "\n[__exit + 0x8]\n"
+ but that requires loading symbols with "yc i" and even if
+ we did do that we don't know that the file has symbols. */
+ static char exitmsg[] = "\n@????????I JMPTI GR121,LR0";
+ char *bp = bpt;
+ char *ep = exitmsg;
+
+ /* Large enough for either sizeof (bpt) or sizeof (exitmsg) chars. */
+ char swallowed[50];
+ /* Current position in swallowed. */
+ char *swallowed_p = swallowed;
+
+ int ch;
+ int ch_handled;
+
+ int old_timeout = timeout;
+
+ WSETEXIT ((*status), 0);
+
+ if (need_artificial_trap != 0)
+ {
+ WSETSTOP ((*status), SIGTRAP);
+ need_artificial_trap--;
+ return 0;
+ }
+
+ timeout = 0; /* Don't time out -- user program is running. */
+ while (1)
+ {
+ ch_handled = 0;
+ ch = readchar ();
+ if (ch == *bp)
+ {
+ bp++;
+ if (*bp == '\0')
+ break;
+ ch_handled = 1;
+
+ *swallowed_p++ = ch;
+ }
+ else
+ bp = bpt;
+
+ if (ch == *ep || *ep == '?')
+ {
+ ep++;
+ if (*ep == '\0')
+ break;
+
+ if (!ch_handled)
+ *swallowed_p++ = ch;
+ ch_handled = 1;
+ }
+ else
+ ep = exitmsg;
+
+ if (!ch_handled)
+ {
+ char *p;
+
+ /* Print out any characters which have been swallowed. */
+ for (p = swallowed; p < swallowed_p; ++p)
+ putc (*p, stdout);
+ swallowed_p = swallowed;
+
+ putc (ch, stdout);
+ }
+ }
+ expect_prompt ();
+ if (*bp== '\0')
+ WSETSTOP ((*status), SIGTRAP);
+ else
+ WSETEXIT ((*status), 0);
+ timeout = old_timeout;
+
+ return 0;
+}
+
+/* Return the name of register number REGNO
+ in the form input and output by EBMON.
+
+ Returns a pointer to a static buffer containing the answer. */
+static char *
+get_reg_name (regno)
+ int regno;
+{
+ static char buf[80];
+ if (regno >= GR96_REGNUM && regno < GR96_REGNUM + 32)
+ sprintf (buf, "GR%03d", regno - GR96_REGNUM + 96);
+ else if (regno >= LR0_REGNUM && regno < LR0_REGNUM + 128)
+ sprintf (buf, "LR%03d", regno - LR0_REGNUM);
+ else if (regno == Q_REGNUM)
+ strcpy (buf, "SR131");
+ else if (regno >= BP_REGNUM && regno <= CR_REGNUM)
+ sprintf (buf, "SR%03d", regno - BP_REGNUM + 133);
+ else if (regno == ALU_REGNUM)
+ strcpy (buf, "SR132");
+ else if (regno >= IPC_REGNUM && regno <= IPB_REGNUM)
+ sprintf (buf, "SR%03d", regno - IPC_REGNUM + 128);
+ else if (regno >= VAB_REGNUM && regno <= LRU_REGNUM)
+ sprintf (buf, "SR%03d", regno - VAB_REGNUM);
+ else if (regno == GR1_REGNUM)
+ strcpy (buf, "GR001");
+ return buf;
+}
+
+/* Read the remote registers into the block REGS. */
+
+static void
+eb_fetch_registers ()
+{
+ int reg_index;
+ int regnum_index;
+ char tempbuf[10];
+ int i;
+
+#if 0
+ /* This should not be necessary, because one is supposed to read the
+ registers only when the inferior is stopped (at least with
+ ptrace() and why not make it the same for remote?). */
+ /* ^A is the "normal character" used to make sure we are talking to EBMON
+ and not to the program being debugged. */
+ write (eb_desc, "\001\n");
+ expect_prompt ();
+#endif
+
+ write (eb_desc, "dw gr96,gr127\n", 14);
+ for (reg_index = 96, regnum_index = GR96_REGNUM;
+ reg_index < 128;
+ reg_index += 4, regnum_index += 4)
+ {
+ sprintf (tempbuf, "GR%03d ", reg_index);
+ expect (tempbuf);
+ get_hex_regs (4, regnum_index);
+ expect ("\n");
+ }
+
+ for (i = 0; i < 128; i += 32)
+ {
+ /* The PC has a tendency to hang if we get these
+ all in one fell swoop ("dw lr0,lr127"). */
+ sprintf (tempbuf, "dw lr%d\n", i);
+ write (eb_desc, tempbuf, strlen (tempbuf));
+ for (reg_index = i, regnum_index = LR0_REGNUM + i;
+ reg_index < i + 32;
+ reg_index += 4, regnum_index += 4)
+ {
+ sprintf (tempbuf, "LR%03d ", reg_index);
+ expect (tempbuf);
+ get_hex_regs (4, regnum_index);
+ expect ("\n");
+ }
+ }
+
+ write (eb_desc, "dw sr133,sr133\n", 15);
+ expect ("SR133 ");
+ get_hex_regs (1, BP_REGNUM);
+ expect ("\n");
+
+ write (eb_desc, "dw sr134,sr134\n", 15);
+ expect ("SR134 ");
+ get_hex_regs (1, FC_REGNUM);
+ expect ("\n");
+
+ write (eb_desc, "dw sr135,sr135\n", 15);
+ expect ("SR135 ");
+ get_hex_regs (1, CR_REGNUM);
+ expect ("\n");
+
+ write (eb_desc, "dw sr131,sr131\n", 15);
+ expect ("SR131 ");
+ get_hex_regs (1, Q_REGNUM);
+ expect ("\n");
+
+ write (eb_desc, "dw sr0,sr14\n", 12);
+ for (reg_index = 0, regnum_index = VAB_REGNUM;
+ regnum_index <= LRU_REGNUM;
+ regnum_index += 4, reg_index += 4)
+ {
+ sprintf (tempbuf, "SR%03d ", reg_index);
+ expect (tempbuf);
+ get_hex_regs (reg_index == 12 ? 3 : 4, regnum_index);
+ expect ("\n");
+ }
+
+ /* There doesn't seem to be any way to get these. */
+ {
+ int val = -1;
+ supply_register (FPE_REGNUM, &val);
+ supply_register (INT_REGNUM, &val);
+ supply_register (FPS_REGNUM, &val);
+ supply_register (EXO_REGNUM, &val);
+ }
+
+ write (eb_desc, "dw gr1,gr1\n", 11);
+ expect ("GR001 ");
+ get_hex_regs (1, GR1_REGNUM);
+ expect_prompt ();
+}
+
+/* Fetch register REGNO, or all registers if REGNO is -1.
+ Returns errno value. */
+void
+eb_fetch_register (regno)
+ int regno;
+{
+ if (regno == -1)
+ eb_fetch_registers ();
+ else
+ {
+ char *name = get_reg_name (regno);
+ fprintf (eb_stream, "dw %s,%s\n", name, name);
+ expect (name);
+ expect (" ");
+ get_hex_regs (1, regno);
+ expect_prompt ();
+ }
+ return;
+}
+
+/* Store the remote registers from the contents of the block REGS. */
+
+static void
+eb_store_registers ()
+{
+ int i, j;
+ fprintf (eb_stream, "s gr1,%x\n", read_register (GR1_REGNUM));
+ expect_prompt ();
+
+ for (j = 0; j < 32; j += 16)
+ {
+ fprintf (eb_stream, "s gr%d,", j + 96);
+ for (i = 0; i < 15; ++i)
+ fprintf (eb_stream, "%x,", read_register (GR96_REGNUM + j + i));
+ fprintf (eb_stream, "%x\n", read_register (GR96_REGNUM + j + 15));
+ expect_prompt ();
+ }
+
+ for (j = 0; j < 128; j += 16)
+ {
+ fprintf (eb_stream, "s lr%d,", j);
+ for (i = 0; i < 15; ++i)
+ fprintf (eb_stream, "%x,", read_register (LR0_REGNUM + j + i));
+ fprintf (eb_stream, "%x\n", read_register (LR0_REGNUM + j + 15));
+ expect_prompt ();
+ }
+
+ fprintf (eb_stream, "s sr133,%x,%x,%x\n", read_register (BP_REGNUM),
+ read_register (FC_REGNUM), read_register (CR_REGNUM));
+ expect_prompt ();
+ fprintf (eb_stream, "s sr131,%x\n", read_register (Q_REGNUM));
+ expect_prompt ();
+ fprintf (eb_stream, "s sr0,");
+ for (i = 0; i < 11; ++i)
+ fprintf (eb_stream, "%x,", read_register (VAB_REGNUM + i));
+ fprintf (eb_stream, "%x\n", read_register (VAB_REGNUM + 11));
+ expect_prompt ();
+}
+
+/* Store register REGNO, or all if REGNO == 0.
+ Return errno value. */
+int
+eb_store_register (regno)
+ int regno;
+{
+ if (regno == -1)
+ eb_store_registers ();
+ else
+ {
+ char *name = get_reg_name (regno);
+ fprintf (eb_stream, "s %s,%x\n", name, read_register (regno));
+ /* Setting GR1 changes the numbers of all the locals, so
+ invalidate the register cache. Do this *after* calling
+ read_register, because we want read_register to return the
+ value that write_register has just stuffed into the registers
+ array, not the value of the register fetched from the
+ inferior. */
+ if (regno == GR1_REGNUM)
+ registers_changed ();
+ expect_prompt ();
+ }
+ return 0;
+}
+
+/* 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. */
+
+void
+eb_prepare_to_store ()
+{
+ /* Do nothing, since we can store individual regs */
+}
+
+
+/* FIXME-someday! Merge these two. */
+int
+eb_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 eb_write_inferior_memory (memaddr, myaddr, len);
+ else
+ return eb_read_inferior_memory (memaddr, myaddr, len);
+}
+
+void
+eb_files_info ()
+{
+ printf ("\tAttached to %s at %d baud and running program %s.\n",
+ dev_name, baudrate, prog_name);
+}
+
+/* Copy LEN bytes of data from debugger memory at MYADDR
+ to inferior's memory at MEMADDR. Returns length moved. */
+int
+eb_write_inferior_memory (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ {
+ if ((i % 16) == 0)
+ fprintf (eb_stream, "sb %x,", memaddr + i);
+ if ((i % 16) == 15 || i == len - 1)
+ {
+ fprintf (eb_stream, "%x\n", ((unsigned char *)myaddr)[i]);
+ expect_prompt ();
+ }
+ else
+ fprintf (eb_stream, "%x,", ((unsigned char *)myaddr)[i]);
+ }
+ return len;
+}
+
+/* Read LEN bytes from inferior memory at MEMADDR. Put the result
+ at debugger address MYADDR. Returns length moved. */
+int
+eb_read_inferior_memory(memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+{
+ int i;
+
+ /* Number of bytes read so far. */
+ int count;
+
+ /* Starting address of this pass. */
+ unsigned long startaddr;
+
+ /* Number of bytes to read in this pass. */
+ int len_this_pass;
+
+ /* Note that this code works correctly if startaddr is just less
+ than UINT_MAX (well, really CORE_ADDR_MAX if there was such a
+ thing). That is, something like
+ eb_read_bytes (CORE_ADDR_MAX - 4, foo, 4)
+ works--it never adds len to memaddr and gets 0. */
+ /* However, something like
+ eb_read_bytes (CORE_ADDR_MAX - 3, foo, 4)
+ doesn't need to work. Detect it and give up if there's an attempt
+ to do that. */
+ if (((memaddr - 1) + len) < memaddr) {
+ errno = EIO;
+ return 0;
+ }
+
+ startaddr = memaddr;
+ count = 0;
+ while (count < len)
+ {
+ len_this_pass = 16;
+ if ((startaddr % 16) != 0)
+ len_this_pass -= startaddr % 16;
+ if (len_this_pass > (len - count))
+ len_this_pass = (len - count);
+
+ fprintf (eb_stream, "db %x,%x\n", startaddr,
+ (startaddr - 1) + len_this_pass);
+ expect ("\n");
+
+ /* Look for 8 hex digits. */
+ i = 0;
+ while (1)
+ {
+ if (isxdigit (readchar ()))
+ ++i;
+ else
+ {
+ expect_prompt ();
+ error ("Hex digit expected from remote system.");
+ }
+ if (i >= 8)
+ break;
+ }
+
+ expect (" ");
+
+ for (i = 0; i < len_this_pass; i++)
+ get_hex_byte (&myaddr[count++]);
+
+ expect_prompt ();
+
+ startaddr += len_this_pass;
+ }
+ return len;
+}
+
+static void
+eb_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. */
+
+void
+eb_mourn_inferior ()
+{
+ remove_breakpoints ();
+ generic_mourn_inferior (); /* Do all the proper things now */
+}
+/* Define the target subroutine names */
+
+struct target_ops eb_ops = {
+ "amd-eb", "Remote serial AMD EBMON target",
+ "Use a remote computer running EBMON connected by a serial line.\n\
+Arguments are the name of the device for the serial line,\n\
+the speed to connect at in bits per second, and the filename of the\n\
+executable as it exists on the remote computer. For example,\n\
+ target amd-eb /dev/ttya 9600 demo",
+ eb_open, eb_close,
+ 0, eb_detach, eb_resume, eb_wait,
+ eb_fetch_register, eb_store_register,
+ eb_prepare_to_store, 0, 0, /* conv_to, conv_from */
+ eb_xfer_inferior_memory, eb_files_info,
+ 0, 0, /* Breakpoints */
+ 0, 0, 0, 0, 0, /* Terminal handling */
+ eb_kill,
+ 0, /* load */
+ 0, /* lookup_symbol */
+ eb_create_inferior,
+ eb_mourn_inferior,
+ process_stratum, 0, /* next */
+ 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */
+ 0, 0, /* Section pointers */
+ OPS_MAGIC, /* Always the last thing */
+};
+
+void
+_initialize_remote_eb ()
+{
+ add_target (&eb_ops);
+}
projects / deliverable / binutils-gdb.git / commitdiff
