--- /dev/null
+/* Memory-access and commands for remote es1800 processes, for GDB.
+ Copyright (C) 1988, 1992 Free Software Foundation, Inc.
+
+ This file is added to GDB to make it possible to do debugging via an
+ ES-1800 emulator. The code was originally written by Johan Holmberg
+ TT/SJ Ericsson Telecom AB and later modified by Johan Henriksson
+ TT/SJ. It was modified for gdb 4.0 by TX/DK Jan Nordenand by TX/DKG
+ Harald Johansen.
+
+This file is part of GDB.
+
+GDB 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 1, or (at your option)
+any later version.
+
+GDB 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 GDB; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+
+/* Emulator communication protocol.
+ All values are encoded in ascii hex digits.
+
+ Request
+Command
+Reply
+ read registers:
+DR<cr>
+ - 0 - - 1 - - 2 - - 3 - - 4 - - 5 - -- 6 - - 7 -
+D = XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
+A = XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
+ PC = XXXXXX SSP = XXXXXX USP = XXXXXX SR = XXXXXXXX
+ >
+Each byte of register data is described by two hex digits.
+
+ write regs
+D0=XXXXXXXX<cr>
+ >D1=XXXXXXXX<cr>
+ >D2=XXXXXXXX<cr>
+ >D3=XXXXXXXX<cr>
+ >D4=XXXXXXXX<cr>
+ >D5=XXXXXXXX<cr>
+ >D6=XXXXXXXX<cr>
+ >D7=XXXXXXXX<cr>
+ >A0=XXXXXXXX<cr>
+ >A1=XXXXXXXX<cr>
+ >A2=XXXXXXXX<cr>
+ >A3=XXXXXXXX<cr>
+ >A4=XXXXXXXX<cr>
+ >A5=XXXXXXXX<cr>
+ >A6=XXXXXXXX<cr>
+ >A7=XXXXXXXX<cr>
+ >SR=XXXXXXXX<cr>
+ >PC=XXXXXX<cr>
+ >
+Each byte of register data is described by two hex digits.
+
+ read mem
+@.BAA..AA
+$FFFFFFXX
+ >
+AA..AA is address, XXXXXXX is the contents
+
+ write mem
+ @.BAA..AA=$XXXXXXXX
+ >
+AA..AA is address, XXXXXXXX is data
+
+ cont
+PC=$AA..AA
+ >RBK
+R>
+AA..AA is address to resume. If AA..AA is omitted, resume at same address.
+
+ step
+PC=$AA..AA
+ >STP
+R>
+AA..AA is address to resume. If AA..AA is omitted, resume at same address.
+
+ kill req
+STP
+ >
+*/
+
+
+#include <stdio.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <sys/file.h>
+#include <errno.h>
+#include <ctype.h>
+#include <string.h>
+#include <setjmp.h>
+#include <fcntl.h>
+#include "defs.h"
+#include "frame.h"
+#include "inferior.h"
+#include "target.h"
+#include "wait.h"
+#include "terminal.h"
+#include "command.h"
+
+#ifdef USG
+#include <sys/types.h>
+#include <sgtty.h>
+#endif
+
+#include <signal.h>
+
+/* External variables referenced. */
+
+extern bfd *exec_bfd;
+
+/* Prototypes for local functions */
+
+static void
+es1800_child_detach PARAMS ((char *, int));
+
+static void
+es1800_child_open PARAMS ((char *, int));
+
+static void
+es1800_transparent PARAMS ((char *, int));
+
+static void
+es1800_create_inferior PARAMS ((char *, char *, char **));
+
+static void
+es1800_load PARAMS ((char *, int));
+
+static void
+es1800_kill PARAMS ((void));
+
+static int
+verify_break PARAMS ((int));
+
+static int
+es1800_remove_breakpoint PARAMS ((CORE_ADDR, char *));
+
+static int
+es1800_insert_breakpoint PARAMS ((CORE_ADDR, char *));
+
+static void
+es1800_files_info PARAMS ((struct target_ops *));
+
+static int
+es1800_xfer_inferior_memory PARAMS ((CORE_ADDR, char *, int, int,
+ struct target_ops *));
+
+static void
+es1800_prepare_to_store PARAMS ((void));
+
+static int
+es1800_wait PARAMS ((WAITTYPE *));
+
+static void
+es1800_resume PARAMS ((int, int));
+
+static void
+es1800_detach PARAMS ((char *, int));
+
+static void
+es1800_attach PARAMS ((char *, int));
+
+static int
+damn_b PARAMS ((char *));
+
+static void
+es1800_open PARAMS ((char *, int));
+
+static void
+es1800_timer PARAMS ((void));
+
+static void
+es1800_reset PARAMS ((char *));
+
+static void
+es1800_request_quit PARAMS ((void));
+
+static int
+readchar PARAMS ((void));
+
+static void
+expect PARAMS ((char *, int));
+
+static void
+expect_prompt PARAMS ((void));
+
+static void
+download PARAMS ((FILE *, int, int));
+
+#if 0
+static void
+bfd_copy PARAMS ((bfd *, bfd *));
+#endif
+
+static void
+get_break_addr PARAMS ((int, CORE_ADDR *));
+
+static int
+fromhex PARAMS ((int));
+
+static int
+tohex PARAMS ((int));
+
+static void
+es1800_close PARAMS ((int));
+
+static void
+es1800_fetch_registers PARAMS ((void));
+
+static void
+es1800_fetch_register PARAMS ((int));
+
+static void
+es1800_store_register PARAMS ((int));
+
+static void
+es1800_read_bytes PARAMS ((CORE_ADDR, char *, int));
+
+static void
+es1800_write_bytes PARAMS ((CORE_ADDR, char *, int));
+
+static void
+send_with_reply PARAMS ((char *, char *, int));
+
+static void
+send_command PARAMS ((char *));
+
+static void
+send PARAMS ((char *));
+
+static void
+getmessage PARAMS ((char *, int));
+
+static void
+es1800_mourn_inferior PARAMS ((void));
+
+static void
+es1800_create_break_insn PARAMS ((char *, int));
+
+static void
+es1800_init_break PARAMS ((char *, int));
+
+/* Local variables */
+
+#define LOG_FILE "es1800.log"
+#if defined (LOG_FILE)
+static FILE *log_file;
+#endif
+
+extern struct target_ops es1800_ops; /* Forward decl */
+extern struct target_ops es1800_child_ops; /* Forward decl */
+
+static int kiodebug;
+static int timeout = 100;
+static char *savename; /* Name of i/o device used */
+static TERMINAL es1800_sg_save; /* Save stty state */
+static int es1800_fc_save; /* Save fcntl state */
+
+/* indicates that the emulator uses 32-bit data-adress (68020-mode)
+ instead of 24-bit (68000 -mode) */
+
+static int m68020;
+
+#define MODE (m68020 ? "M68020" : "M68000" )
+#define ES1800_BREAK_VEC (0xf)
+
+/* Descriptor for I/O to remote machine. Initialize it to -1 so that
+ es1800_open knows that we don't have a file open when the program
+ starts. */
+
+static int es1800_desc = -1;
+
+#define PBUFSIZ 1000
+#define HDRLEN sizeof("@.BAAAAAAAA=$VV\r")
+
+/* Maximum number of bytes to read/write at once. The value here
+ is chosen to fill up a packet. */
+
+#define MAXBUFBYTES ((PBUFSIZ-150)*16/75 )
+
+static int es1800_break_vec = 0;
+static char es1800_break_insn[2];
+static long es1800_break_address;
+static void (*old_sigint)(); /* Old signal-handler for sigint */
+static jmp_buf interrupt;
+
+/* Local signalhandler to allow breaking tranfers or program run.
+ Rely on global variables: old_sigint(), interrupt */
+
+static void
+es1800_request_quit ()
+{
+ /* restore original signalhandler */
+ signal (SIGINT, old_sigint);
+ longjmp (interrupt, 1);
+}
+
+
+/* Reset emulator.
+ Sending reset character(octal 32) to emulator.
+ quit - return to '(esgdb)' prompt or continue */
+
+static void
+es1800_reset (quit)
+ char *quit;
+{
+ char buf[80];
+
+ if (quit)
+ {
+ printf ("\nResetting emulator... ");
+ }
+ strcpy (buf, "\032");
+ send (buf);
+ expect_prompt ();
+ if (quit)
+ {
+ error ("done\n");
+ }
+}
+
+
+/* Called when SIGALRM signal sent due to alarm() timeout.
+ Rely on global variables: timeout */
+
+#ifndef HAVE_TERMIO
+
+static void
+es1800_timer ()
+{
+ if (kiodebug)
+ {
+ printf ("es1800_timer called\n");
+ }
+ alarm (timeout);
+}
+
+#endif /* HAVE_TERMIO */
+
+
+/* Open a connection to a remote debugger and push the new target
+ onto the stack. Check if the emulator is responding and find out
+ what kind of processor the emulator is connected to.
+ Initiate the breakpoint handling in the emulator.
+
+ name - the filename used for communication (ex. '/dev/tta')
+ from_tty - says whether to be verbose or not */
+
+static void
+es1800_open (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ TERMINAL sg;
+ char buf[PBUFSIZ];
+ char *p;
+ int i, fcflag;
+ char *baudrate;
+
+ m68020 = 0;
+
+ if (!name) /* no device name given in target command */
+ {
+ error_no_arg ("serial port device name");
+ }
+ baudrate = baud_rate ? baud_rate : "19200"; /* default baudrate = 19200 */
+
+ target_preopen (from_tty);
+ es1800_close (0);
+
+ /* open the device and configure it for communication */
+
+#ifndef DEBUG_STDIN
+
+ es1800_desc = open (name, O_RDWR);
+ if (es1800_desc < 0)
+ {
+ perror_with_name (name);
+ }
+ savename = savestring (name, strlen (name));
+
+ if (ioctl (es1800_desc, TIOCGETP, &sg) == -1)
+ {
+ perror_with_name (name);
+ }
+ es1800_sg_save = sg;
+
+ if ((fcflag = fcntl (es1800_desc, F_GETFL, 0)) == -1)
+ {
+ perror_with_name ("fcntl serial");
+ }
+ es1800_fc_save = fcflag;
+
+ fcflag = (fcflag & (FREAD | FWRITE)); /* mask out any funny stuff */
+ if (fcntl (es1800_desc, F_SETFL, fcflag) == -1)
+ {
+ perror_with_name ("fcntl serial");
+ }
+
+#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 = CBREAK+TANDEM;
+#endif
+
+ if ((ioctl (es1800_desc, TIOCSETP, &sg)) == -1)
+ {
+ perror ("es1800_open: error in ioctl");
+ }
+
+#endif /* DEBUG_STDIN */
+
+ push_target (&es1800_ops); /* Switch to using remote target now */
+ if (from_tty)
+ {
+ printf ("Remote ES1800 debugging using %s\n", 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 ("es1800_open: error in siginterrupt");
+ }
+
+#endif /* NO_SIGINTERRUPT */
+
+ /* Set up read timeout timer. */
+
+ if ((void(*)()) signal (SIGALRM, es1800_timer) == (void(*)()) -1)
+ {
+ perror ("es1800_open: error in signal");
+ }
+
+#endif /* HAVE_TERMIO */
+
+
+#if defined (LOG_FILE)
+
+ log_file = fopen (LOG_FILE, "w");
+ if (log_file == NULL)
+ {
+ perror_with_name (LOG_FILE);
+ }
+
+#endif /* LOG_FILE */
+
+ /* Hello? Are you there?, also check mode */
+
+ /* send_with_reply( "DB 0 TO 1", buf, sizeof(buf)); */
+ /* for (p = buf, i = 0; *p++ =='0';) */ /* count the number of zeros */
+ /* i++; */
+
+ send ("\032");
+ getmessage (buf, sizeof (buf)); /* send reset character */
+
+ if (from_tty)
+ {
+ printf ("Checking mode.... ");
+ }
+ /* m68020 = (i==8); */ /* if eight zeros then we are in m68020 mode */
+
+ /* What kind of processor am i talking to ?*/
+ p = buf;
+ while (*p++ != '\n') {;}
+ while (*p++ != '\n') {;}
+ while (*p++ != '\n') {;}
+ for (i = 0; i < 20; i++, p++) {;}
+ m68020 = !strncmp (p, "68020", 5);
+ if (from_tty)
+ {
+ printf ("You are in %s(%c%c%c%c%c)-mode\n", MODE, p[0], p[1], p[2],
+ p[3], p[4]);
+ }
+
+ /* if no init_break statement is present in .gdb file we have to check
+ whether to download a breakpoint routine or not */
+
+#if 0
+ if ((es1800_break_vec == 0) || (verify_break (es1800_break_vec) != 0)
+ && query ("No breakpoint routine in ES 1800 emulator!\nDownload a breakpoint routine to the emulator? "))
+ {
+ CORE_ADDR memaddress;
+ printf ("Give the start address of the breakpoint routine: ");
+ scanf ("%li", &memaddress);
+ es1800_init_break ((es1800_break_vec ? es1800_break_vec :
+ ES1800_BREAK_VEC), memaddress);
+ }
+#endif
+
+}
+
+/* Close out all files and local state before this target loses control.
+ quitting - are we quitting gdb now? */
+
+static void
+es1800_close (quitting)
+ int quitting;
+{
+ if (es1800_desc >= 0)
+ {
+ printf ("\nClosing connection to emulator...\n");
+ ioctl (es1800_desc, TIOCSETP, &es1800_sg_save);
+ fcntl (es1800_desc,F_SETFL, es1800_fc_save);
+ close (es1800_desc);
+ es1800_desc = -1;
+ }
+ if (savename != NULL)
+ {
+ free (savename);
+ }
+ savename = NULL;
+
+#if defined (LOG_FILE)
+
+ if (log_file != NULL)
+ {
+ if (ferror (log_file))
+ {
+ printf ("Error writing log file.\n");
+ }
+ if (fclose (log_file) != 0)
+ {
+ printf ("Error closing log file.\n");
+ }
+ log_file = NULL;
+ }
+
+#endif /* LOG_FILE */
+
+}
+
+/* damn_b()
+
+ Translate baud rates from integers to damn B_codes. Unix should
+ have outgrown this crap years ago, but even POSIX wouldn't buck it.
+ rate - the baudrate given as a string
+ return value: the baudrate as a B_code */
+
+#ifndef B19200
+# define B19200 EXTA
+#endif
+#ifndef B38400
+# define B38400 EXTB
+#endif
+
+struct
+{
+ char *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},
+ {0, -1},
+};
+
+static int
+damn_b (rate)
+ char *rate;
+{
+ int i;
+
+ for (i = 0; baudtab[i].rate != 0; i++)
+ {
+ if (STREQ (rate, baudtab[i].rate))
+ {
+ return (baudtab[i].damn_b);
+ }
+ }
+ error ("Illegal baudrate");
+}
+
+
+/* Attaches to a process on the target side
+ proc_id - the id of the process to be attached.
+ from_tty - says whether to be verbose or not */
+
+static void
+es1800_attach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ error ("Cannot attach to pid %s, this feature is not implemented yet.",
+ args);
+}
+
+
+/* Takes a program previously attached to and detaches it.
+ We better not have left any breakpoints
+ in the program or it'll die when it hits one.
+ Close the open connection to the remote debugger.
+ Use this when you want to detach and do something else
+ with your gdb.
+
+ args - arguments given to the 'detach' command
+ from_tty - says whether to be verbose or not */
+
+static void
+es1800_detach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ if (args)
+ {
+ error ("Argument given to \"detach\" when remotely debugging.");
+ }
+ pop_target ();
+ if (from_tty)
+ {
+ printf ("Ending es1800 remote debugging.\n");
+ }
+}
+
+
+/* Tell the remote machine to resume.
+ step - single-step or run free
+ siggnal - the signal value to be given to the target (0 = no signal) */
+
+static void
+es1800_resume (step, siggnal)
+ int step;
+ int siggnal;
+{
+ char buf[PBUFSIZ];
+
+ if (siggnal)
+ {
+ error ("Can't send signals to a remote system.");
+ }
+ if (step)
+ {
+ strcpy (buf,"STP\r");
+ send (buf);
+ }
+ else
+ {
+ send_command ("RBK");
+ }
+}
+
+/* Wait until the remote machine stops, then return,
+ storing status in STATUS just as `wait' would.
+ status - */
+
+static int
+es1800_wait (status)
+ WAITTYPE *status;
+{
+ unsigned char buf[PBUFSIZ];
+ int old_timeout = timeout;
+
+ WSETEXIT ((*status), 0);
+ timeout = 0; /* Don't time out -- user program is running. */
+ if (!setjmp (interrupt))
+ {
+ old_sigint = signal (SIGINT, es1800_request_quit);
+ while (1)
+ {
+ getmessage (buf, sizeof(buf));
+ if (strncmp ( buf, "\r\n* BREAK *", 11) == 0)
+ {
+ WSETSTOP ((*status), SIGTRAP);
+ send_command ("STP"); /* Restore stack and PC and such */
+ if (m68020)
+ {
+ send_command ("STP");
+ }
+ break;
+ }
+ if (strncmp (buf, "STP\r\n ", 6) == 0)
+ {
+ WSETSTOP ((*status), SIGTRAP);
+ break;
+ }
+ if (buf[strlen (buf) - 2] == 'R')
+ {
+ printf ("Unexpected emulator reply: \n%s\n", buf);
+ }
+ else
+ {
+ printf ("Unexpected stop: \n%s\n", buf);
+ WSETSTOP ((*status), SIGQUIT);
+ break;
+ }
+ }
+ }
+ else
+ {
+ fflush (stdin);
+ printf ("\nStopping emulator...");
+ if (!setjmp (interrupt))
+ {
+ old_sigint = signal (SIGINT, es1800_request_quit);
+ send_command ("STP");
+ printf (" emulator stopped\n");
+ WSETSTOP ((*status), SIGINT);
+ }
+ else
+ {
+ fflush (stdin);
+ es1800_reset ((char*) 1);
+ }
+ }
+ signal (SIGINT, old_sigint);
+ timeout = old_timeout;
+ return (0);
+}
+
+
+/* Fetch register values from remote machine.
+ regno - the register to be fetched (fetch all registers if -1) */
+
+static void
+es1800_fetch_register (regno)
+ int regno;
+{
+ char buf[PBUFSIZ];
+ int k;
+ int r;
+ char *p;
+ static char regtab[18][4] =
+ {
+ "D0 ", "D1 ", "D2 ", "D3 ", "D4 ", "D5 ", "D6 ", "D7 ",
+ "A0 ", "A1 ", "A2 ", "A3 ", "A4 ", "A5 ", "A6 ", "SSP",
+ "SR ", "PC "
+ };
+
+ if ((regno < 15) || (regno == 16) || (regno == 17))
+ {
+ r = regno * 4;
+ send_with_reply (regtab[regno], buf, sizeof (buf));
+ p = buf;
+ for (k = 0; k < 4; k++)
+ {
+ if ((p[k*2 + 1] == 0) || (p[k*2 + 2] == 0))
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ registers[r++] = (fromhex (p[k*2 + 1]) * 16) + fromhex (p[k*2 + 2]);
+ }
+ }
+ else
+ {
+ es1800_fetch_registers ();
+ }
+}
+
+/* Read the remote registers into REGISTERS.
+ Always fetches all registers. */
+
+static void
+es1800_fetch_registers ()
+{
+ char buf[PBUFSIZ];
+ char SR_buf[PBUFSIZ];
+ int i;
+ int k;
+ int r;
+ char *p;
+
+ send_with_reply ("DR", buf, sizeof (buf));
+
+ /* Reply is edited to a string that describes registers byte by byte,
+ each byte encoded as two hex characters. */
+
+ p = buf;
+ r = 0;
+
+ /* parsing row one - D0-D7-registers */
+
+ while (*p++ != '\n') {;}
+ for (i = 4; i < 70; i += (i == 39 ? 3 : 1))
+ {
+ for (k = 0; k < 4; k++)
+ {
+ if (p[i+0] == 0 || p[i+1] == 0)
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ registers[r++] = (fromhex (p[i+0]) * 16) + fromhex (p[i+1]);
+ i += 2;
+ }
+ }
+ p += i;
+
+ /* parsing row two - A0-A6-registers */
+
+ while (*p++ != '\n') {;}
+ for (i = 4; i < 61; i += (i == 39 ? 3 : 1))
+ {
+ for (k = 0; k < 4; k++)
+ {
+ if (p[i+0] == 0 || p[i+1] == 0)
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ registers[r++] = (fromhex (p[i+0])) * 16 + fromhex (p[i+1]);
+ i += 2;
+ }
+ }
+ p += i;
+
+ while (*p++ != '\n') {;}
+
+ /* fetch SSP-, SR- and PC-registers */
+
+ /* first - check STATUS-word and decide which stackpointer to use */
+
+ send_with_reply ("SR", SR_buf, sizeof (SR_buf));
+ p = SR_buf;
+ p += 5;
+
+ if (m68020)
+ {
+ if (*p == '3') /* use masterstackpointer MSP */
+ {
+ send_with_reply ("MSP", buf, sizeof (buf));
+ }
+ else if (*p == '2') /* use interruptstackpointer ISP */
+ {
+ send_with_reply ("ISP", buf, sizeof (buf));
+ }
+ else /* use userstackpointer USP */
+ {
+ send_with_reply ("USP", buf, sizeof (buf));
+ }
+ p = buf;
+ for (k = 0; k<4; k++)
+ {
+ if (p[k*2+1] == 0 || p[k*2+2] == 0)
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ registers[r++] = fromhex (buf[k*2+1]) * 16 + fromhex (buf[k*2+2]);
+ }
+
+ p = SR_buf;
+ for (k = 0; k < 4; k++)
+ {
+ if (p[k*2+1] == 0 || p[k*2+2] == 0)
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ registers[r++] =
+ fromhex (SR_buf[k*2+1]) * 16 + fromhex (SR_buf[k*2+2]);
+ }
+ send_with_reply ("PC", buf, sizeof (buf));
+ p = buf;
+ for (k = 0; k<4; k++)
+ {
+ if (p[k*2+1] == 0 || p[k*2+2] == 0)
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ registers[r++] = fromhex (buf[k*2+1]) * 16 + fromhex (buf[k*2+2]);
+ }
+ }
+ else /* 68000-mode */
+ {
+ if (*p == '2') /* use supervisorstackpointer SSP */
+ {
+ send_with_reply ("SSP", buf, sizeof (buf));
+ }
+ else /* use userstackpointer USP */
+ {
+ send_with_reply ("USP", buf, sizeof (buf));
+ }
+
+ /* fetch STACKPOINTER */
+
+ p = buf;
+ for (k = 0; k < 4; k++)
+ {
+ if (p[k*2 + 1] == 0 || p[k*2 + 2] == 0)
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ registers[r++] = fromhex (buf[k*2+1]) * 16 + fromhex (buf[k*2+2]);
+ }
+
+ /* fetch STATUS */
+
+ p = SR_buf;
+ for (k = 0; k < 4; k++)
+ {
+ if (p[k*2+1] == 0 || p[k*2+2] == 0)
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ registers[r++] =
+ fromhex (SR_buf[k*2+1]) * 16 + fromhex (SR_buf[k*2+2]);
+ }
+
+ /* fetch PC */
+
+ send_with_reply ("PC", buf, sizeof (buf));
+ p = buf;
+ for (k = 0; k < 4; k++)
+ {
+ if (p[k*2+1] == 0 || p[k*2+2] == 0)
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ registers[r++] = fromhex (buf[k*2+1]) * 16 + fromhex (buf[k*2+2]);
+ }
+ }
+}
+
+/* Store register value, located in REGISTER, on the target processor.
+ regno - the register-number of the register to store
+ (-1 means store them all)
+ FIXME: Return errno value. */
+
+static void
+es1800_store_register(regno)
+ int regno;
+{
+
+ static char regtab[18][4] =
+ {
+ "D0 ", "D1 ", "D2 ", "D3 ", "D4 ", "D5 ", "D6 ", "D7 ",
+ "A0 ", "A1 ", "A2 ", "A3 ", "A4 ", "A5 ", "A6 ", "SSP",
+ "SR ", "PC "
+ };
+
+ char buf[PBUFSIZ];
+ char SR_buf[PBUFSIZ];
+ char stack_pointer[4];
+ char *p;
+ int i;
+ int j;
+ int k;
+ unsigned char *r;
+
+ r = (unsigned char *) registers;
+
+ if (regno == -1) /* write all registers */
+ {
+ j = 0;
+ k = 18;
+ }
+ else /* write one register */
+ {
+ j = regno;
+ k = regno+1;
+ r += regno * 4;
+ }
+
+ if ((regno == -1) || (regno == 15))
+ {
+ /* fetch current status */
+ send_with_reply ("SR", SR_buf, sizeof (SR_buf));
+ p = SR_buf;
+ p += 5;
+ if (m68020)
+ {
+ if (*p == '3') /* use masterstackpointer MSP */
+ {
+ strcpy (stack_pointer,"MSP");
+ }
+ else
+ {
+ if (*p == '2') /* use interruptstackpointer ISP */
+ {
+ strcpy (stack_pointer,"ISP");
+ }
+ else
+ {
+ strcpy (stack_pointer,"USP"); /* use userstackpointer USP */
+ }
+ }
+ }
+ else /* 68000-mode */
+ {
+ if (*p == '2') /* use supervisorstackpointer SSP */
+ {
+ strcpy (stack_pointer,"SSP");
+ }
+ else
+ {
+ strcpy (stack_pointer,"USP");/* use userstackpointer USP */
+ }
+ }
+ strcpy (regtab[15],stack_pointer);
+ }
+
+ for (i = j; i<k; i++)
+ {
+ buf[0] = regtab[i][0];
+ buf[1] = regtab[i][1];
+ buf[2] = regtab[i][2];
+ buf[3] = '=';
+ buf[4] = '$';
+ buf[5] = tohex ((*r >> 4) & 0x0f);
+ buf[6] = tohex (*r++ & 0x0f);
+ buf[7] = tohex ((*r >> 4) & 0x0f);
+ buf[8] = tohex (*r++ & 0x0f);
+ buf[9] = tohex ((*r >> 4) & 0x0f);
+ buf[10] = tohex (*r++ & 0x0f);
+ buf[11] = tohex ((*r >> 4) & 0x0f);
+ buf[12] = tohex (*r++ & 0x0f);
+ buf[13] = 0;
+
+ send_with_reply (buf, buf, sizeof (buf)); /* FIXME, reply not used? */
+ }
+}
+
+
+/* Prepare to store registers. */
+
+static void
+es1800_prepare_to_store ()
+{
+ /* Do nothing, since we can store individual regs */
+}
+
+/* Convert hex digit A to a number. */
+
+static int
+fromhex (a)
+ int a;
+{
+ if (a >= '0' && a <= '9')
+ {
+ return a - '0';
+ }
+ else if (a >= 'a' && a <= 'f')
+ {
+ return a - 'a' + 10;
+ }
+ else if (a >= 'A' && a <= 'F')
+ {
+ return a - 'A' + 10;
+ }
+ else
+ {
+ error ("Reply contains invalid hex digit");
+ }
+ return (-1);
+}
+
+
+/* Convert number NIB to a hex digit. */
+
+static int
+tohex (nib)
+ int nib;
+{
+ if (nib < 10)
+ {
+ return ('0' + nib);
+ }
+ else
+ {
+ return ('A' + nib - 10);
+ }
+}
+
+/* Read or write LEN bytes from inferior memory at MEMADDR, transferring
+ to or from debugger address MYADDR. Write to inferior if WRITE is
+ nonzero. Returns length of data written or read; 0 for error.
+
+ memaddr - the target's address
+ myaddr - gdb's address
+ len - number of bytes
+ write - write if != 0 otherwise read */
+
+static int
+es1800_xfer_inferior_memory (memaddr, myaddr, len, write, tops)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+ int write;
+ struct target_ops *tops; /* Unused */
+{
+ int origlen = len;
+ int xfersize;
+
+ while (len > 0)
+ {
+ xfersize = len > MAXBUFBYTES ? MAXBUFBYTES : len;
+ if (write)
+ {
+ es1800_write_bytes (memaddr, myaddr, xfersize);
+ }
+ else
+ {
+ es1800_read_bytes (memaddr, myaddr, xfersize);
+ }
+ memaddr += xfersize;
+ myaddr += xfersize;
+ len -= xfersize;
+ }
+ return (origlen); /* no error possible */
+}
+
+
+/* Write memory data directly to the emulator.
+ This does not inform the data cache; the data cache uses this.
+ MEMADDR is the address in the remote memory space.
+ MYADDR is the address of the buffer in our space.
+ LEN is the number of bytes.
+
+ memaddr - the target's address
+ myaddr - gdb's address
+ len - number of bytes */
+
+static void
+es1800_write_bytes (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+{
+ char buf[PBUFSIZ];
+ int i;
+ char *p;
+
+ p = myaddr;
+ for (i = 0; i < len; i++)
+ {
+ sprintf (buf, "@.B$%x=$%x", memaddr+i, (*p++) & 0xff);
+ send_with_reply (buf, buf, sizeof (buf)); /* FIXME send_command? */
+ }
+}
+
+
+/* Read memory data directly from the emulator.
+ This does not use the data cache; the data cache uses this.
+
+ memaddr - the target's address
+ myaddr - gdb's address
+ len - number of bytes */
+
+static void
+es1800_read_bytes (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+{
+ static int DB_tab[16] = {8,11,14,17,20,23,26,29,34,37,40,43,46,49,52,55};
+ char buf[PBUFSIZ];
+ int i;
+ int low_addr;
+ char *p;
+ char *b;
+
+ if (len > PBUFSIZ / 2 - 1)
+ {
+ abort ();
+ }
+
+ if (len == 1) /* The emulator does not like expressions like: */
+ {
+ len = 2; /* DB.B $20018 TO $20018 */
+ }
+
+ /* Reply describes registers byte by byte, each byte encoded as two hex
+ characters. */
+
+ sprintf (buf, "DB.B $%x TO $%x", memaddr, memaddr+len-1);
+ send_with_reply (buf, buf, sizeof (buf));
+ b = buf;
+ low_addr = memaddr&0x0f;
+ for (i = low_addr; i < low_addr + len; i++)
+ {
+ if ((!(i % 16)) && i)
+ { /* if (i = 16,32,48) */
+ while (*p++!='\n') {;}
+ b = p;
+ }
+ p = b + DB_tab[i%16] + (m68020 ? 2 : 0);
+ if (p[0] == 32 || p[1] == 32)
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ myaddr[i-low_addr] = fromhex (p[0]) * 16 + fromhex (p[1]);
+ }
+}
+
+/* Information about the current target */
+
+static void
+es1800_files_info (tops)
+ struct target_ops *tops; /* Unused */
+{
+ printf ("ES1800 Attached to %s at %d baud in %s mode\n", savename, 19200,
+ MODE);
+}
+
+
+/* We read the contents of the target location and stash it,
+ then overwrite it with a breakpoint instruction.
+
+ addr - is the target location in the target machine.
+ contents_cache - is a pointer to memory allocated for saving the target contents.
+ It is guaranteed by the caller to be long enough to save sizeof
+ BREAKPOINT bytes.
+
+ FIXME: This size is target_arch dependent and should be available in
+ the target_arch transfer vector, if we ever have one... */
+
+static int
+es1800_insert_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+ int val;
+
+ val = target_read_memory (addr, contents_cache, sizeof (es1800_break_insn));
+
+ if (val == 0)
+ {
+ val = target_write_memory (addr, es1800_break_insn,
+ sizeof (es1800_break_insn));
+ }
+
+ return (val);
+}
+
+
+/* Write back the stashed instruction
+
+ addr - is the target location in the target machine.
+ contents_cache - is a pointer to memory allocated for saving the target contents.
+ It is guaranteed by the caller to be long enough to save sizeof
+ BREAKPOINT bytes. */
+
+static int
+es1800_remove_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+
+ return (target_write_memory (addr, contents_cache,
+ sizeof (es1800_break_insn)));
+}
+
+/* create_break_insn ()
+ Primitive datastructures containing the es1800 breakpoint instruction */
+
+static void
+es1800_create_break_insn (ins, vec)
+ char *ins;
+ int vec;
+{
+ if (vec == 15)
+ {
+ ins[0] = 0x4e;
+ ins[1] = 0x4f;
+ }
+}
+
+
+/* verify_break ()
+ Seach for breakpoint routine in emulator memory.
+ returns non-zero on failure
+ vec - trap vector used for breakpoints */
+
+static int
+verify_break (vec)
+ int vec;
+{
+ CORE_ADDR memaddress;
+ char buf[8];
+ char *instr = "NqNqNqNs"; /* breakpoint routine */
+ int status;
+
+ get_break_addr (vec, &memaddress);
+
+ if (memaddress)
+ {
+ status = target_read_memory (memaddress, buf, 8);
+ if (status != 0)
+ {
+ memory_error (status, memaddress);
+ }
+ return (STRCMP (instr, buf));
+ }
+ return (-1);
+}
+
+
+/* get_break_addr ()
+ find address of breakpint routine
+ vec - trap vector used for breakpoints
+ addrp - store the address here */
+
+static void
+get_break_addr (vec, addrp)
+ int vec;
+ CORE_ADDR *addrp;
+{
+ CORE_ADDR memaddress = 0;
+ int status;
+ int k;
+ char buf[PBUFSIZ];
+ char base_addr[4];
+ char *p;
+
+ if (m68020)
+ {
+ send_with_reply ("VBR ", buf, sizeof (buf));
+ p = buf;
+ for (k = 0; k < 4; k++)
+ {
+ if ((p[k*2 + 1] == 0) || (p[k*2 + 2] == 0))
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ base_addr[k] = (fromhex (p[k*2 + 1]) * 16) + fromhex (p[k*2 + 2]);
+ }
+ /* base addr of exception vector table */
+ memaddress = *((CORE_ADDR *) base_addr);
+ }
+
+ memaddress += (vec + 32) * 4; /* address of trap vector */
+ status = target_read_memory (memaddress, (char *) addrp, 4);
+ if (status != 0)
+ {
+ memory_error (status, memaddress);
+ }
+}
+
+
+/* Kill an inferior process */
+
+static void
+es1800_kill ()
+{
+ if (inferior_pid != 0)
+ {
+ inferior_pid = 0;
+ es1800_mourn_inferior ();
+ }
+}
+
+
+/* Load a file to the ES1800 emulator.
+ Converts the file from a.out format into Extended Tekhex format
+ before the file is loaded.
+ Also loads the trap routine, and sets the ES1800 breakpoint on it
+ filename - the a.out to be loaded
+ from_tty - says whether to be verbose or not
+ FIXME Uses emulator overlay memory for trap routine */
+
+static void
+es1800_load (filename, from_tty)
+ char *filename;
+ int from_tty;
+{
+
+ FILE *instream;
+ char loadname[15];
+ char buf[160];
+ struct cleanup *old_chain;
+ int es1800_load_format = 5;
+
+ if (es1800_desc < 0)
+ {
+ printf ("No emulator attached, type emulator-command first\n");
+ return;
+ }
+
+ filename = tilde_expand (filename);
+ make_cleanup (free, filename);
+
+ switch (es1800_load_format)
+ {
+ case 2: /* Extended Tekhex */
+ if (from_tty)
+ {
+ printf ("Converting \"%s\" to Extended Tekhex Format\n", filename);
+ }
+ sprintf (buf, "tekhex %s", filename);
+ system (buf);
+ sprintf (loadname, "out.hex");
+ break;
+
+ case 5: /* Motorola S-rec */
+ if (from_tty)
+ {
+ printf ("Converting \"%s\" to Motorola S-record format\n",
+ filename);
+ }
+ /* in the future the source code in copy (part of binutils-1.93) will
+ be included in this file */
+ sprintf (buf,
+ "copy -s \"a.out-sunos-big\" -d \"srec\" %s /tmp/out.hex",
+ filename);
+ system (buf);
+ sprintf (loadname, "/tmp/out.hex");
+ break;
+
+ default:
+ error ("Downloading format not defined\n");
+ }
+
+ mark_breakpoints_out ();
+ inferior_pid = 0;
+ if (from_tty)
+ {
+ printf ("Downloading \"%s\" to the ES 1800\n",filename);
+ }
+ if ((instream = fopen (loadname, "r")) == NULL)
+ {
+ perror_with_name ("fopen:");
+ }
+
+ old_chain = make_cleanup (fclose, instream);
+ immediate_quit++;
+
+ es1800_reset (0);
+
+ download (instream, from_tty, es1800_load_format);
+
+ /* if breakpoint routine is not present anymore we have to check
+ whether to download a new breakpoint routine or not */
+
+ if ((verify_break (es1800_break_vec) != 0)
+ && query ("No breakpoint routine in ES 1800 emulator!\nDownload a breakpoint routine to the emulator? "))
+ {
+ char buf[128];
+ printf ("Using break vector 0x%x\n", es1800_break_vec);
+ sprintf (buf, "0x%x ", es1800_break_vec);
+ printf ("Give the start address of the breakpoint routine: ");
+ fgets (buf + strlen (buf), sizeof (buf) - strlen (buf), stdin);
+ es1800_init_break (buf, 0);
+ }
+
+ do_cleanups (old_chain);
+ expect_prompt ();
+ readchar (); /* FIXME I am getting a ^G = 7 after the prompt */
+ printf ("\n");
+
+ if (fclose (instream) == EOF)
+ {
+ ;
+ }
+
+ if (es1800_load_format != 2)
+ {
+ sprintf (buf, "/usr/bin/rm %s", loadname);
+ system (buf);
+ }
+
+ symbol_file_command (filename, from_tty); /* reading symbol table */
+ immediate_quit--;
+}
+
+#if 0
+
+#define NUMCPYBYTES 20
+
+static void
+bfd_copy (from_bfd, to_bfd)
+ bfd *from_bfd;
+ bfd *to_bfd;
+{
+ asection *p, *new;
+ int i;
+ char buf[NUMCPYBYTES];
+
+ for (p = from_bfd->sections; p != NULL; p = p->next)
+ {
+ printf (" Copying section %s. Size = %x.\n", p->name, p->_cooked_size);
+ printf (" vma = %x, offset = %x, output_sec = %x\n",
+ p->vma, p->output_offset, p->output_section);
+ new = bfd_make_section (to_bfd, p->name);
+ if (p->_cooked_size &&
+ !bfd_set_section_size (to_bfd, new, p->_cooked_size))
+ {
+ error ("Wrong BFD size!\n");
+ }
+ if (!bfd_set_section_flags (to_bfd, new, p->flags))
+ {
+ error ("bfd_set_section_flags");
+ }
+ new->vma = p->vma;
+
+ for (i = 0; (i + NUMCPYBYTES) < p->_cooked_size ; i += NUMCPYBYTES)
+ {
+ if (!bfd_get_section_contents (from_bfd, p, (PTR) buf, (file_ptr) i,
+ (bfd_size_type) NUMCPYBYTES))
+ {
+ error ("bfd_get_section_contents\n");
+ }
+ if (!bfd_set_section_contents (to_bfd, new, (PTR) buf, (file_ptr) i,
+ (bfd_size_type) NUMCPYBYTES))
+ {
+ error ("bfd_set_section_contents\n");
+ }
+ }
+ bfd_get_section_contents (from_bfd, p, (PTR) buf, (file_ptr) i,
+ (bfd_size_type) (p->_cooked_size - i));
+ bfd_set_section_contents (to_bfd, new, (PTR) buf,(file_ptr) i,
+ (bfd_size_type) (p->_cooked_size - i));
+ }
+}
+
+#endif
+
+/* Start an process on the es1800 and set inferior_pid to the new
+ process' pid.
+ execfile - the file to run
+ args - arguments passed to the program
+ env - the environment vector to pass */
+
+static void
+es1800_create_inferior (execfile, args, env)
+ char *execfile;
+ char *args;
+ char **env;
+{
+ int entry_pt;
+ int pid;
+#if 0
+ struct expression *expr;
+ register struct cleanup *old_chain = 0;
+ register value val;
+#endif
+
+ if (args && *args)
+ {
+ error ("Can't pass arguments to remote ES1800 process");
+ }
+
+#if 0
+ if (query ("Use 'start' as entry point? "))
+ {
+ expr = parse_c_expression ("start");
+ old_chain = make_cleanup (free_current_contents, &expr);
+ val = evaluate_expression (expr);
+ entry_pt = (val->location).address;
+ }
+ else
+ {
+ printf ("Enter the program's entry point (in hexadecimal): ");
+ scanf ("%x", &entry_pt);
+ }
+#endif
+
+ if (execfile == 0 || exec_bfd == 0)
+ {
+ error ("No exec file specified");
+ }
+
+ entry_pt = (int) bfd_get_start_address (exec_bfd);
+
+ pid = 42;
+
+ /* Now that we have a child process, make it our target. */
+
+ push_target (&es1800_child_ops);
+
+ /* The "process" (board) is already stopped awaiting our commands, and
+ the program is already downloaded. We just set its PC and go. */
+
+ inferior_pid = pid; /* Needed for wait_for_inferior below */
+
+ 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 ();
+
+ /* remote_start (args); */
+ /* trap_expected = 0; */
+ /* insert_step_breakpoint (); FIXME, do we need this? */
+
+ proceed ((CORE_ADDR) entry_pt, -1, 0); /* Let 'er rip... */
+
+}
+
+
+/* The process has died, clean up. */
+
+static void
+es1800_mourn_inferior ()
+{
+ remove_breakpoints ();
+ unpush_target (&es1800_child_ops);
+ generic_mourn_inferior (); /* Do all the proper things now */
+}
+
+/* ES1800-protocol specific routines */
+
+/* Keep discarding input from the remote system, until STRING is found.
+ Let the user break out immediately.
+ string - the string to expect
+ nowait - break out if string not the emulator's first respond otherwise
+ read until string is found (== 0) */
+
+static void
+expect (string, nowait)
+ char *string;
+ int nowait;
+{
+ char c;
+ char *p = string;
+
+ immediate_quit++;
+ while (1)
+ {
+ c = readchar ();
+ if (isalpha (c))
+ {
+ c = toupper (c);
+ }
+ if (c == toupper (*p))
+ {
+ p++;
+ if (*p == '\0')
+ {
+ immediate_quit--;
+ return;
+ }
+ }
+ else if (!nowait)
+ {
+ p = string;
+ }
+ else
+ {
+ printf ("\'%s\' expected\n" , string);
+ printf ("char %d is %d", p - string, c);
+ error ("\n" );
+ }
+ }
+}
+
+/* Keep discarding input until we see the prompt. */
+
+static void
+expect_prompt ()
+{
+ expect (">", 0);
+}
+
+
+/* Read one character */
+
+#ifdef DEBUG_STDIN
+
+/* read from stdin */
+
+static int
+readchar ()
+{
+ char buf[1];
+
+ buf[0] = '\0';
+ printf ("readchar, give one character\n");
+ read (0, buf, 1);
+
+#if defined (LOG_FILE)
+ putc (buf[0] & 0x7f, log_file);
+#endif
+
+ return (buf[0] & 0x7f);
+}
+
+#else /* !DEBUG_STDIN */
+
+/* Read a character from the remote system, doing all the fancy
+ timeout stuff. */
+
+static int
+readchar ()
+{
+ char buf[1];
+
+ buf[0] = '\0';
+
+#ifdef HAVE_TERMIO
+
+ /* termio does the timeout for us. */
+ read (es1800_desc, buf, 1);
+
+#else
+
+ alarm (timeout);
+ while (read (es1800_desc, buf, 1) != 1)
+ {
+ if (errno == EINTR)
+ {
+ error ("Timeout reading from remote system.");
+ }
+ else if (errno != EWOULDBLOCK)
+ {
+ perror_with_name ("remote read");
+ }
+ }
+ alarm (0);
+#endif
+
+#if defined (LOG_FILE)
+ putc (buf[0] & 0x7f, log_file);
+ fflush (log_file);
+#endif
+
+ return (buf[0] & 0x7f);
+}
+
+#endif /* DEBUG_STDIN */
+
+
+/* Send a command to the emulator and save the reply.
+ Report an error if we get an error reply.
+ string - the es1800 command
+ buf - containing the emulator reply on return
+ len - size of buf */
+
+static void
+send_with_reply (string, buf, len)
+ char *string, *buf;
+ int len;
+{
+ send (string);
+ write (es1800_desc, "\r", 1);
+
+#ifndef DEBUG_STDIN
+ expect (string, 1);
+ expect ("\r\n", 0);
+#endif
+
+ getmessage (buf, len);
+}
+
+
+/* Send the command in STR to the emulator adding \r. check
+ the echo for consistency.
+ string - the es1800 command */
+
+static void
+send_command (string)
+ char *string;
+{
+ send (string);
+ write (es1800_desc, "\r", 1);
+
+#ifndef DEBUG_STDIN
+ expect (string, 0);
+ expect_prompt ();
+#endif
+
+}
+
+/* Send a string
+ string - the es1800 command */
+
+static void
+send (string)
+ char *string;
+{
+ if (kiodebug)
+ {
+ fprintf (stderr, "Sending: %s\n", string);
+ }
+ write (es1800_desc, string, strlen (string));
+}
+
+
+/* Read a message from the emulator and store it in BUF.
+ buf - containing the emulator reply on return
+ len - size of buf */
+
+static void
+getmessage (buf, len)
+ char *buf;
+ int len;
+{
+ char *bp;
+ int c;
+ int prompt_found = 0;
+ extern kiodebug;
+
+#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
+
+ bp = buf;
+ c = readchar ();
+ do
+ {
+ if (c)
+ {
+ if (len-- < 2) /* char and terminaling NULL */
+ {
+ error ("input buffer overrun\n");
+ }
+ *bp++ = c;
+ }
+ c = readchar ();
+ if ((c == '>') && (*(bp - 1) == ' '))
+ {
+ prompt_found = 1;
+ }
+ }
+ while (!prompt_found);
+ *bp = 0;
+
+ if (kiodebug)
+ {
+ fprintf (stderr,"message received :%s\n", buf);
+ }
+}
+
+static void
+download (instream, from_tty, format)
+FILE *instream;
+ int from_tty;
+ int format;
+{
+ char c;
+ char buf[160];
+ int i = 0;
+
+ send_command ("SET #2,$1A"); /* reset char = ^Z */
+ send_command ("SET #3,$11,$13"); /* XON XOFF */
+ if (format == 2)
+ {
+ send_command ("SET #26,#2");
+ }
+ else
+ {
+ send_command ("SET #26,#5"); /* Format=Extended Tekhex */
+ }
+ send_command ("DFB = $10");
+ send_command ("PUR");
+ send_command ("CES");
+ send ("DNL\r");
+ expect ("DNL", 1);
+ if (from_tty)
+ {
+ printf (" 0 records loaded...\r");
+ }
+ while (fgets (buf, 160, instream))
+ {
+ send (buf);
+ if (from_tty)
+ {
+ printf ("%5d\b\b\b\b\b",++i);
+ fflush (stdout);
+ }
+ if ((c = readchar ()) != 006)
+ {
+ error ("expected ACK");
+ }
+ }
+ if (from_tty)
+ {
+ printf ("- All");
+ }
+}
+
+/* Additional commands */
+
+/* Talk directly to the emulator
+ FIXME, uses busy wait, and is SUNOS (or at least BSD) specific */
+
+/*ARGSUSED*/
+static void
+es1800_transparent (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ int console;
+ struct sgttyb modebl;
+ int fcflag;
+ int cc;
+ struct sgttyb console_mode_save;
+ int console_fc_save;
+ int es1800_fc_save;
+ int inputcnt = 80;
+ char inputbuf[80];
+ int consolecnt = 0;
+ char consolebuf[80];
+ int es1800_cnt = 0;
+ char es1800_buf[80];
+ int i;
+
+ dont_repeat ();
+ if (es1800_desc < 0)
+ {
+ printf ("No emulator attached, type emulator-command first\n");
+ return;
+ }
+
+ printf ("\n");
+ printf ("You are now communicating directly with the ES 1800 emulator.\n");
+ printf ("To leave this mode (transparent mode), press ^E.\n");
+ printf ("\n");
+ printf (" >");
+ fflush (stdout);
+
+ if ((console = open ("/dev/tty", O_RDWR)) == -1)
+ {
+ perror_with_name ("/dev/tty:");
+ }
+
+ if ((fcflag = fcntl (console, F_GETFL, 0)) == -1)
+ {
+ perror_with_name ("fcntl console");
+ }
+
+ console_fc_save = fcflag;
+ fcflag = fcflag | FNDELAY;
+
+ if (fcntl (console, F_SETFL, fcflag) == -1)
+ {
+ perror_with_name ("fcntl console");
+ }
+
+ if (ioctl (console, TIOCGETP, &modebl))
+ {
+ perror_with_name ("ioctl console");
+ }
+
+ console_mode_save = modebl;
+ modebl.sg_flags = RAW;
+
+ if (ioctl (console, TIOCSETP, &modebl))
+ {
+ perror_with_name ("ioctl console");
+ }
+
+ if ((fcflag = fcntl (es1800_desc, F_GETFL, 0)) == -1)
+ {
+ perror_with_name ("fcntl serial");
+ }
+
+ es1800_fc_save = fcflag;
+ fcflag = fcflag | FNDELAY;
+
+ if (fcntl (es1800_desc, F_SETFL, fcflag) == -1)
+ {
+ perror_with_name ("fcntl serial");
+ }
+
+ while (1)
+ {
+ cc = read (console, inputbuf, inputcnt);
+ if (cc != -1)
+ {
+ if ((*inputbuf & 0x7f) == 0x05)
+ {
+ break;
+ }
+ for (i = 0; i < cc; )
+ {
+ es1800_buf[es1800_cnt++] = inputbuf[i++];
+ }
+ if ((cc = write (es1800_desc, es1800_buf, es1800_cnt)) == -1)
+ {
+ perror_with_name ("FEL! read:");
+ }
+ es1800_cnt -= cc;
+ if (es1800_cnt && cc)
+ {
+ for (i = 0; i < es1800_cnt; i++)
+ {
+ es1800_buf[i] = es1800_buf[cc+i];
+ }
+ }
+ }
+ else if (errno != EWOULDBLOCK)
+ {
+ perror_with_name ("FEL! read:");
+ }
+
+ cc = read (es1800_desc,inputbuf,inputcnt);
+ if (cc != -1)
+ {
+ for (i = 0; i < cc; )
+ {
+ consolebuf[consolecnt++] = inputbuf[i++];
+ }
+ if ((cc = write (console,consolebuf,consolecnt)) == -1)
+ {
+ perror_with_name ("FEL! write:");
+ }
+ consolecnt -= cc;
+ if (consolecnt && cc)
+ {
+ for (i = 0; i < consolecnt; i++)
+ {
+ consolebuf[i] = consolebuf[cc+i];
+ }
+ }
+ }
+ else if (errno != EWOULDBLOCK)
+ {
+ perror_with_name ("FEL! read:");
+ }
+ }
+
+ console_fc_save = console_fc_save & !FNDELAY;
+ if (fcntl (console, F_SETFL, console_fc_save) == -1)
+ {
+ perror_with_name ("FEL! fcntl");
+ }
+
+ if (ioctl (console, TIOCSETP, &console_mode_save))
+ {
+ perror_with_name ("FEL! ioctl");
+ }
+
+ close (console);
+
+ if (fcntl (es1800_desc, F_SETFL, es1800_fc_save) == -1)
+ {
+ perror_with_name ("FEL! fcntl");
+ }
+
+ printf ("\n");
+
+}
+
+static void
+es1800_init_break (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ CORE_ADDR memaddress = 0;
+ char buf[PBUFSIZ];
+ char base_addr[4];
+ char *space_index;
+ char *p;
+ int k;
+
+ if (args == NULL)
+ {
+ error_no_arg ("a trap vector");
+ }
+
+ if (!(space_index = strchr (args, ' ')))
+ {
+ error ("Two arguments needed (trap vector and address of break routine).\n");
+ }
+
+ *space_index = '\0';
+
+ es1800_break_vec = strtol (args, (char **) NULL, 0);
+ es1800_break_address = parse_and_eval_address (space_index + 1);
+
+ es1800_create_break_insn (es1800_break_insn, es1800_break_vec);
+
+ if (m68020)
+ {
+ send_with_reply ("VBR ", buf, sizeof (buf));
+ p = buf;
+ for (k = 0; k < 4; k++)
+ {
+ if ((p[k*2 + 1] == 0) || (p[k*2 + 2] == 0))
+ {
+ error ("Emulator reply is too short: %s", buf);
+ }
+ base_addr[k] = (fromhex (p[k*2 + 1]) * 16) + fromhex (p[k*2 + 2]);
+ }
+ /* base addr of exception vector table */
+ memaddress = *((CORE_ADDR *) base_addr);
+ }
+
+ memaddress += (es1800_break_vec + 32) * 4; /* address of trap vector */
+
+ sprintf (buf, "@.L%lx=$%lx", memaddress, es1800_break_address);
+ send_command (buf); /* set the address of the break routine in the */
+ /* trap vector */
+
+ sprintf (buf, "@.L%lx=$4E714E71", es1800_break_address); /* NOP; NOP */
+ send_command (buf);
+ sprintf (buf, "@.L%lx=$4E714E73", es1800_break_address + 4); /* NOP; RTE */
+ send_command (buf);
+
+ sprintf (buf, "AC2=$%lx", es1800_break_address + 4);
+ /* breakpoint at es1800-break_address */
+ send_command (buf);
+ send_command ("WHEN AC2 THEN BRK"); /* ie in exception routine */
+
+ if (from_tty)
+ {
+ printf ("Breakpoint (trap $%x) routine at address: %lx\n",
+ es1800_break_vec, es1800_break_address);
+ }
+}
+
+static void
+es1800_child_open (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ error ("Use the \"run\" command to start a child process.");
+}
+
+static void
+es1800_child_detach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ if (args)
+ {
+ error ("Argument given to \"detach\" when remotely debugging.");
+ }
+
+ pop_target ();
+ if (from_tty)
+ {
+ printf ("Ending debugging the process %d.\n", inferior_pid);
+ }
+}
+
+
+/* Define the target subroutine names */
+
+static struct target_ops es1800_ops =
+{
+ "es1800", /* to_shortname */
+ /* to_longname */
+ "Remote serial target in ES1800-emulator protocol",
+ /* to_doc */
+ "Remote debugging on the es1800 emulator via a serial line.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya).",
+ es1800_open, /* to_open */
+ es1800_close, /* to_close */
+ es1800_attach, /* to_attach */
+ es1800_detach, /* to_detach */
+ es1800_resume, /* to_resume */
+ NULL, /* to_wait */
+ NULL, /* to_fetch_registers */
+ NULL, /* to_store_registers */
+ es1800_prepare_to_store, /* to_prepare_to_store */
+ es1800_xfer_inferior_memory, /* to_xfer_memory */
+ es1800_files_info, /* to_files_info */
+ es1800_insert_breakpoint, /* to_insert_breakpoint */
+ es1800_remove_breakpoint, /* to_remove_breakpoint */
+ NULL, /* to_terminal_init */
+ NULL, /* to_terminal_inferior */
+ NULL, /* to_terminal_ours_for_output */
+ NULL, /* to_terminal_ours */
+ NULL, /* to_terminal_info */
+ NULL, /* to_kill */
+ es1800_load, /* to_load */
+ NULL, /* to_lookup_symbol */
+ es1800_create_inferior, /* to_create_inferior */
+ NULL, /* to_mourn_inferior */
+ 0, /* to_can_run */
+ 0, /* notice_signals */
+ core_stratum, /* to_stratum */
+ 0, /* to_next */
+ 0, /* to_has_all_memory */
+ 1, /* to_has_memory */
+ 0, /* to_has_stack */
+ 0, /* to_has_registers */
+ 0, /* to_has_execution */
+ NULL, /* to_sections */
+ NULL, /* to_sections_end */
+ OPS_MAGIC /* to_magic (always last) */
+};
+
+/* Define the target subroutine names */
+
+static struct target_ops es1800_child_ops =
+{
+ "es1800_process", /* to_shortname */
+ /* to_longname */
+ "Remote serial target in ES1800-emulator protocol",
+ /* to_doc */
+ "Remote debugging on the es1800 emulator via a serial line.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya).",
+ es1800_child_open, /* to_open */
+ NULL, /* to_close */
+ es1800_attach, /* to_attach */
+ es1800_child_detach, /* to_detach */
+ es1800_resume, /* to_resume */
+ es1800_wait, /* to_wait */
+ es1800_fetch_register, /* to_fetch_registers */
+ es1800_store_register, /* to_store_registers */
+ es1800_prepare_to_store, /* to_prepare_to_store */
+ es1800_xfer_inferior_memory, /* to_xfer_memory */
+ es1800_files_info, /* to_files_info */
+ es1800_insert_breakpoint, /* to_insert_breakpoint */
+ es1800_remove_breakpoint, /* to_remove_breakpoint */
+ NULL, /* to_terminal_init */
+ NULL, /* to_terminal_inferior */
+ NULL, /* to_terminal_ours_for_output */
+ NULL, /* to_terminal_ours */
+ NULL, /* to_terminal_info */
+ es1800_kill, /* to_kill */
+ es1800_load, /* to_load */
+ NULL, /* to_lookup_symbol */
+ es1800_create_inferior, /* to_create_inferior */
+ es1800_mourn_inferior, /* to_mourn_inferior */
+ 0, /* to_can_run */
+ 0, /* notice_signals */
+ process_stratum, /* to_stratum */
+ 0, /* to_next */
+ 1, /* to_has_all_memory */
+ 1, /* to_has_memory */
+ 1, /* to_has_stack */
+ 1, /* to_has_registers */
+ 1, /* to_has_execution */
+ NULL, /* to_sections */
+ NULL, /* to_sections_end */
+ OPS_MAGIC /* to_magic (always last) */
+};
+
+/* _initialize_es1800 () */
+
+void
+_initialize_es1800 ()
+{
+ add_target (&es1800_ops);
+ add_target (&es1800_child_ops);
+ add_com ("transparent", class_support, es1800_transparent,
+ "Start transparent communication with the ES 1800 emulator.");
+ add_com ("init_break", class_support, es1800_init_break,
+ "Download break routine and initialize break facility on ES 1800");
+}
--- /dev/null
+/* Remote debugging interface for Tandem ST2000 phone switch, 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 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 an esoteric situation--
+ having an a29k 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."
+
+ In reality, this module talks to a debug monitor called 'STDEBUG', which
+ runs in a phone switch. We communicate with STDEBUG via either a direct
+ serial line, or a TCP (or possibly TELNET) stream to a terminal multiplexor,
+ which in turn talks to the phone switch. */
+
+#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 "serial.h"
+
+extern struct target_ops st2000_ops; /* Forward declaration */
+
+static void st2000_close();
+static void st2000_fetch_register();
+static void st2000_store_register();
+
+#define LOG_FILE "st2000.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
+ st2000_open knows that we don't have a file open when the program
+ starts. */
+
+static serial_t st2000_desc;
+
+/* Send data to stdebug. Works just like printf. */
+
+static void
+printf_stdebug(va_alist)
+ va_dcl
+{
+ va_list args;
+ char *pattern;
+ char buf[200];
+
+ va_start(args);
+
+ pattern = va_arg(args, char *);
+
+ vsprintf(buf, pattern, args);
+ if (SERIAL_WRITE(st2000_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(st2000_desc, timeout);
+
+#ifdef LOG_FILE
+ 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.");
+ }
+
+ perror_with_name("remote-st2000");
+}
+
+/* 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;
+
+ immediate_quit = 1;
+ while (1)
+ {
+ c = readchar(timeout);
+ if (c == *p++)
+ {
+ if (*p == '\0')
+ {
+ immediate_quit = 0;
+ 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 STDEBUG 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: st2000_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 st2000_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 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 ("dbug> ", 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 stdebug 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++, (char *) &val);
+ }
+}
+
+/* This is called not only when we first attach, but also when the
+ user types "run" after having attached. */
+static void
+st2000_create_inferior (execfile, args, env)
+ char *execfile;
+ char *args;
+ char **env;
+{
+ int entry_pt;
+
+ if (args && *args)
+ error("Can't pass arguments to remote STDEBUG 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
+
+/* 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... */
+}
+
+/* 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
+st2000_open(args, from_tty)
+ char *args;
+ int from_tty;
+{
+ int n;
+ char junk[100];
+
+ target_preopen(from_tty);
+
+ n = sscanf(args, " %s %d %s", dev_name, &baudrate, junk);
+
+ if (n != 2)
+ error("Bad arguments. Usage: target st2000 <device> <speed>\n\
+or target st2000 <host> <port>\n");
+
+ st2000_close(0);
+
+ st2000_desc = SERIAL_OPEN(dev_name);
+
+ if (!st2000_desc)
+ perror_with_name(dev_name);
+
+ SERIAL_SETBAUDRATE(st2000_desc, baudrate);
+
+ SERIAL_RAW(st2000_desc);
+
+ push_target(&st2000_ops);
+
+#if defined (LOG_FILE)
+ log_file = fopen (LOG_FILE, "w");
+ if (log_file == NULL)
+ perror_with_name (LOG_FILE);
+#endif
+
+ /* Hello? Are you there? */
+ printf_stdebug("\003"); /* ^C wakes up dbug */
+
+ expect_prompt(1);
+
+ if (from_tty)
+ printf("Remote %s connected to %s\n", target_shortname,
+ dev_name);
+}
+
+/* Close out all files and local state before this target loses control. */
+
+static void
+st2000_close (quitting)
+ int quitting;
+{
+ SERIAL_CLOSE(st2000_desc);
+
+#if defined (LOG_FILE)
+ 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");
+ }
+#endif
+}
+
+/* Terminate the open connection to the remote debugger.
+ Use this when you want to detach and do something else
+ with your gdb. */
+static void
+st2000_detach (from_tty)
+ int from_tty;
+{
+ pop_target(); /* calls st2000_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
+st2000_resume (step, sig)
+ int step, sig;
+{
+ if (step)
+ {
+ printf_stdebug ("ST\r");
+ /* Wait for the echo. */
+ expect ("ST\r", 1);
+ }
+ else
+ {
+ printf_stdebug ("GO\r");
+ /* Swallow the echo. */
+ expect ("GO\r", 1);
+ }
+}
+
+/* Wait until the remote machine stops, then return,
+ storing status in STATUS just as `wait' would. */
+
+static int
+st2000_wait (status)
+ WAITTYPE *status;
+{
+ int old_timeout = timeout;
+
+ WSETEXIT ((*status), 0);
+
+ timeout = 0; /* Don't time out -- user program is running. */
+
+ expect_prompt(0); /* Wait for prompt, outputting extraneous text */
+
+ WSETSTOP ((*status), SIGTRAP);
+
+ timeout = old_timeout;
+
+ return 0;
+}
+
+/* Return the name of register number REGNO in the form input and output by
+ STDEBUG. Currently, REGISTER_NAMES just happens to contain exactly what
+ STDEBUG wants. Lets take advantage of that just as long as possible! */
+
+static char *
+get_reg_name (regno)
+ int regno;
+{
+ static char buf[50];
+ const char *p;
+ char *b;
+
+ b = buf;
+
+ for (p = reg_names[regno]; *p; p++)
+ *b++ = toupper(*p);
+ *b = '\000';
+
+ return buf;
+}
+
+/* Read the remote registers into the block REGS. */
+
+static void
+st2000_fetch_registers ()
+{
+ int regno;
+
+ /* Yeah yeah, I know this is horribly inefficient. But it isn't done
+ very often... I'll clean it up later. */
+
+ for (regno = 0; regno <= PC_REGNUM; regno++)
+ st2000_fetch_register(regno);
+}
+
+/* Fetch register REGNO, or all registers if REGNO is -1.
+ Returns errno value. */
+static void
+st2000_fetch_register (regno)
+ int regno;
+{
+ if (regno == -1)
+ st2000_fetch_registers ();
+ else
+ {
+ char *name = get_reg_name (regno);
+ printf_stdebug ("DR %s\r", name);
+ expect (name, 1);
+ expect (" : ", 1);
+ get_hex_regs (1, regno);
+ expect_prompt (1);
+ }
+ return;
+}
+
+/* Store the remote registers from the contents of the block REGS. */
+
+static void
+st2000_store_registers ()
+{
+ int regno;
+
+ for (regno = 0; regno <= PC_REGNUM; regno++)
+ st2000_store_register(regno);
+
+ registers_changed ();
+}
+
+/* Store register REGNO, or all if REGNO == 0.
+ Return errno value. */
+static void
+st2000_store_register (regno)
+ int regno;
+{
+ if (regno == -1)
+ st2000_store_registers ();
+ else
+ {
+ printf_stdebug ("PR %s %x\r", get_reg_name (regno),
+ read_register (regno));
+
+ 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
+st2000_prepare_to_store ()
+{
+ /* Do nothing, since we can store individual regs */
+}
+
+static void
+st2000_files_info ()
+{
+ printf ("\tAttached to %s at %d baud.\n",
+ dev_name, baudrate);
+}
+
+/* Copy LEN bytes of data from debugger memory at MYADDR
+ to inferior's memory at MEMADDR. Returns length moved. */
+static int
+st2000_write_inferior_memory (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ unsigned char *myaddr;
+ int len;
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ {
+ printf_stdebug ("PM.B %x %x\r", memaddr + i, myaddr[i]);
+ expect_prompt (1);
+ }
+ return len;
+}
+
+/* Read LEN bytes from inferior memory at MEMADDR. Put the result
+ at debugger address MYADDR. Returns length moved. */
+static int
+st2000_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
+ st2000_read_bytes (CORE_ADDR_MAX - 4, foo, 4)
+ works--it never adds len to memaddr and gets 0. */
+ /* However, something like
+ st2000_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);
+
+ printf_stdebug ("DI.L %x %x\r", startaddr, len_this_pass);
+ expect (": ", 1);
+
+ for (i = 0; i < len_this_pass; i++)
+ get_hex_byte (&myaddr[count++]);
+
+ expect_prompt (1);
+
+ startaddr += len_this_pass;
+ }
+ return len;
+}
+
+/* FIXME-someday! Merge these two. */
+static int
+st2000_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 st2000_write_inferior_memory (memaddr, myaddr, len);
+ else
+ return st2000_read_inferior_memory (memaddr, myaddr, len);
+}
+
+static void
+st2000_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
+st2000_mourn_inferior ()
+{
+ remove_breakpoints ();
+ unpush_target (&st2000_ops);
+ generic_mourn_inferior (); /* Do all the proper things now */
+}
+
+#define MAX_STDEBUG_BREAKPOINTS 16
+
+extern int memory_breakpoint_size;
+static CORE_ADDR breakaddr[MAX_STDEBUG_BREAKPOINTS] = {0};
+
+static int
+st2000_insert_breakpoint (addr, shadow)
+ CORE_ADDR addr;
+ char *shadow;
+{
+ int i;
+
+ for (i = 0; i <= MAX_STDEBUG_BREAKPOINTS; i++)
+ if (breakaddr[i] == 0)
+ {
+ breakaddr[i] = addr;
+
+ st2000_read_inferior_memory(addr, shadow, memory_breakpoint_size);
+ printf_stdebug("BR %x H\r", addr);
+ expect_prompt(1);
+ return 0;
+ }
+
+ fprintf(stderr, "Too many breakpoints (> 16) for STDBUG\n");
+ return 1;
+}
+
+static int
+st2000_remove_breakpoint (addr, shadow)
+ CORE_ADDR addr;
+ char *shadow;
+{
+ int i;
+
+ for (i = 0; i < MAX_STDEBUG_BREAKPOINTS; i++)
+ if (breakaddr[i] == addr)
+ {
+ breakaddr[i] = 0;
+
+ printf_stdebug("CB %d\r", i);
+ expect_prompt(1);
+ return 0;
+ }
+
+ fprintf(stderr, "Can't find breakpoint associated with 0x%x\n", addr);
+ return 1;
+}
+
+
+/* Put a command string, in args, out to STDBUG. Output from STDBUG is placed
+ on the users terminal until the prompt is seen. */
+
+static void
+st2000_command (args, fromtty)
+ char *args;
+ int fromtty;
+{
+ if (!st2000_desc)
+ error("st2000 target not open.");
+
+ if (!args)
+ error("Missing command.");
+
+ printf_stdebug("%s\r", args);
+ expect_prompt(0);
+}
+
+/* Connect the user directly to STDBUG. 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);*/
+}
+
+#if 0
+/* This all should now be in serial.c */
+
+static void
+connect_command (args, fromtty)
+ char *args;
+ int fromtty;
+{
+ fd_set readfds;
+ int numfds;
+ int c;
+ char cur_esc = 0;
+
+ dont_repeat();
+
+ if (st2000_desc < 0)
+ error("st2000 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(st2000_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 stdebug */
+ c = getchar();
+ if (c < 0)
+ perror_with_name("connect");
+
+ printf_stdebug("%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(st2000_desc, &readfds))
+ {
+ while (1)
+ {
+ c = readchar(0);
+ if (c < 0)
+ break;
+ putchar(c);
+ }
+ fflush(stdout);
+ }
+ }
+}
+#endif /* 0 */
+
+/* Define the target subroutine names */
+
+struct target_ops st2000_ops = {
+ "st2000",
+ "Remote serial Tandem ST2000 target",
+ "Use a remote computer running STDEBUG connected by a serial line,\n\
+or a network connection.\n\
+Arguments are the name of the device for the serial line,\n\
+the speed to connect at in bits per second.",
+ st2000_open,
+ st2000_close,
+ 0,
+ st2000_detach,
+ st2000_resume,
+ st2000_wait,
+ st2000_fetch_register,
+ st2000_store_register,
+ st2000_prepare_to_store,
+ st2000_xfer_inferior_memory,
+ st2000_files_info,
+ st2000_insert_breakpoint,
+ st2000_remove_breakpoint, /* Breakpoints */
+ 0,
+ 0,
+ 0,
+ 0,
+ 0, /* Terminal handling */
+ st2000_kill,
+ 0, /* load */
+ 0, /* lookup_symbol */
+ st2000_create_inferior,
+ st2000_mourn_inferior,
+ 0, /* can_run */
+ 0, /* notice_signals */
+ 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_st2000 ()
+{
+ add_target (&st2000_ops);
+ add_com ("st2000 <command>", class_obscure, st2000_command,
+ "Send a command to the STDBUG monitor.");
+ add_com ("connect", class_obscure, connect_command,
+ "Connect the terminal directly up to the STDBUG command monitor.\n\
+Use <CR>~. or <CR>~^D to break out.");
+}
projects / external / binutils.git / commitdiff