gdb/mon960-rom.c

   1 /* Remote target glue for the Intel 960 MON960 ROM monitor.
   2    Copyright 1995, 1996 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20
  21 #include "defs.h"
  22 #include "gdbcore.h"
  23 #include "target.h"
  24 #include "monitor.h"
  25 #include "serial.h"
  26 #include "srec.h"
  27 #include "xmodem.h"
  28 #include "symtab.h"
  29 #include "symfile.h" /* for generic_load */
  30
  31 #if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY)
  32 #define HAVE_SGTTY
  33 #endif
  34
  35 #ifdef HAVE_SGTTY
  36 #include <sys/ioctl.h>
  37 #endif
  38
  39 #include <sys/types.h>  /* Needed by file.h on Sys V */
  40 #include <sys/file.h>
  41 #include <signal.h>
  42 #include <sys/stat.h>
  43
  44 #define USE_GENERIC_LOAD
  45
  46 static struct target_ops mon960_ops;
  47
  48 static void mon960_open PARAMS ((char *args, int from_tty));
  49
  50 #ifdef USE_GENERIC_LOAD
  51
  52 static void
  53 mon960_load_gen (filename, from_tty)
  54     char *filename;
  55     int from_tty;
  56 {
  57   extern int inferior_pid;
  58
  59   generic_load (filename, from_tty);
  60   /* Finally, make the PC point at the start address */
  61   if (exec_bfd)
  62     write_pc (bfd_get_start_address (exec_bfd));
  63
  64   inferior_pid = 0;             /* No process now */
  65 }
  66
  67 #else
  68
  69 static void
  70 mon960_load (desc, file, hashmark)
  71      serial_t desc;
  72      char *file;
  73      int hashmark;
  74 {
  75   bfd *abfd;
  76   asection *s;
  77   char *buffer;
  78   int i;
  79
  80   buffer = alloca (XMODEM_PACKETSIZE);
  81   abfd = bfd_openr (file, 0);
  82   if (!abfd)
  83     {
  84       printf_filtered ("Unable to open file %s\n", file);
  85       return;
  86     }
  87   if (bfd_check_format (abfd, bfd_object) == 0)
  88     {
  89       printf_filtered ("File is not an object file\n");
  90       return;
  91     }
  92   for (s = abfd->sections; s; s = s->next)
  93     if (s->flags & SEC_LOAD)
  94       {
  95         bfd_size_type section_size;
  96         printf_filtered ("%s\t: 0x%4x .. 0x%4x  ", s->name, s->vma,
  97                          s->vma + s->_raw_size);
  98         gdb_flush (gdb_stdout);
  99         monitor_printf (current_monitor->load, s->vma);
 100         if (current_monitor->loadresp)
 101           monitor_expect (current_monitor->loadresp, NULL, 0);
 102         xmodem_init_xfer (desc);
 103         section_size = bfd_section_size (abfd, s);
 104         for (i = 0; i < section_size; i += XMODEM_DATASIZE)
 105           {
 106             int numbytes;
 107             numbytes = min (XMODEM_DATASIZE, section_size - i);
 108             bfd_get_section_contents (abfd, s, buffer + XMODEM_DATAOFFSET, i,
 109                                       numbytes);
 110             xmodem_send_packet (desc, buffer, numbytes, hashmark);
 111             if (hashmark)
 112               {
 113                 putchar_unfiltered ('#');
 114                 gdb_flush (gdb_stdout);
 115               }
 116           }                     /* Per-packet (or S-record) loop */
 117         xmodem_finish_xfer (desc);
 118         monitor_expect_prompt (NULL, 0);
 119         putchar_unfiltered ('\n');
 120       }                         /* Loadable sections */
 121   if (hashmark)
 122     putchar_unfiltered ('\n');
 123 }
 124
 125 #endif /* USE_GENERIC_LOAD */
 126
 127 /* This array of registers need to match the indexes used by GDB.
 128    This exists because the various ROM monitors use different strings
 129    than does GDB, and don't necessarily support all the registers
 130    either. So, typing "info reg sp" becomes a "r30".  */
 131
 132 /* these correspond to the offsets from tm-* files from config directories */
 133 /* g0-g14, fp, pfp, sp, rip,r3-15, pc, ac, tc, fp0-3 */
 134 /* NOTE: "ip" is documented as "ir" in the Mon960 UG. */
 135 /* NOTE: "ir" can't be accessed... but there's an ip and rip. */
 136 static char *full_regnames[NUM_REGS] = {
 137   /*  0 */ "pfp", "sp",  "rip", "r3",  "r4",  "r5",  "r6",  "r7",
 138   /*  8 */ "r8",  "r9",  "r10", "r11", "r12", "r13", "r14", "r15",
 139   /* 16 */ "g0",  "g1",  "g2",  "g3",  "g4",  "g5",  "g6",  "g7",
 140   /* 24 */ "g8",  "g9",  "g10", "g11", "g12", "g13", "g14", "fp",
 141   /* 32 */ "pc",  "ac",  "tc",  "ip",  "fp0", "fp1", "fp2", "fp3",
 142   };
 143
 144 static char *mon960_regnames[NUM_REGS];
 145
 146 /* Define the monitor command strings. Since these are passed directly
 147    through to a printf style function, we may include formatting
 148    strings. We also need a CR or LF on the end.  */
 149
 150 /* need to pause the monitor for timing reasons, so slow it down */
 151
 152 #if 0
 153 /* FIXME: this extremely long init string causes MON960 to return two NAKS
 154    instead of performing the autobaud recognition, at least when gdb
 155    is running on Linux.  The short string below works on Linux, and on
 156    SunOS using a tcp serial connection.  Must retest on SunOS using a
 157    direct serial connection; if that works, get rid of the long string. */
 158 static char *mon960_inits[] = {"\n\r\r\r\r\r\r\r\r\r\r\r\r\r\r\n\r\n\r\n", NULL};
 159 #else
 160 static char *mon960_inits[] = { "\r", NULL};
 161 #endif
 162
 163 static struct monitor_ops mon960_cmds =
 164 {
 165   MO_CLR_BREAK_USES_ADDR
 166     | MO_NO_ECHO_ON_OPEN
 167     | MO_SEND_BREAK_ON_STOP
 168     | MO_GETMEM_READ_SINGLE,    /* flags */
 169   mon960_inits,                 /* Init strings */
 170   "go\n\r",                     /* continue command */
 171   "st\n\r",                     /* single step */
 172   NULL,                         /* break interrupts the program */
 173   NULL,                         /* set a breakpoint */
 174                                 /* can't use "br" because only 2 hw bps are supported */
 175   NULL,                         /* clear a breakpoint - "de" is for hw bps */
 176   NULL,                         /* clear all breakpoints */
 177   NULL,                         /* fill (start end val) */
 178                                 /* can't use "fi" because it takes words, not bytes */
 179   {
 180     /* can't use "mb", "md" or "mo" because they require interaction */
 181     NULL,                       /* setmem.cmdb (addr, value) */
 182     NULL,                       /* setmem.cmdw (addr, value) */
 183     "md %x %x\n\r",             /* setmem.cmdl (addr, value) */
 184     NULL,                       /* setmem.cmdll (addr, value) */
 185     NULL,                       /* setmem.resp_delim */
 186     NULL,                       /* setmem.term */
 187     NULL,                       /* setmem.term_cmd */
 188   },
 189   {
 190     /* since the parsing of multiple bytes is difficult due to
 191        interspersed addresses, we'll only read 1 value at a time,
 192        even tho these can handle a count */
 193     "db %x\n\r",                /* getmem.cmdb (addr, #bytes) */
 194     "ds %x\n\r",                /* getmem.cmdw (addr, #swords) */
 195     "di %x\n\r",                /* getmem.cmdl (addr, #words) */
 196     "dd %x\n\r",                /* getmem.cmdll (addr, #dwords) */
 197     " : ",                      /* getmem.resp_delim */
 198     NULL,                       /* getmem.term */
 199     NULL,                       /* getmem.term_cmd */
 200   },
 201   {
 202     "md %s %x\n\r",             /* setreg.cmd (name, value) */
 203     NULL,                       /* setreg.resp_delim */
 204     NULL,                       /* setreg.term */
 205     NULL                        /* setreg.term_cmd */
 206   },
 207   {
 208     "di %s\n\r",                /* getreg.cmd (name) */
 209     " : ",                      /* getreg.resp_delim */
 210     NULL,                       /* getreg.term */
 211     NULL,                       /* getreg.term_cmd */
 212   },
 213   "re\n\r",                     /* dump_registers */
 214   "\\(\\w+\\)=\\([0-9a-fA-F]+\\)",      /* register_pattern */
 215   NULL,                         /* supply_register */
 216 #ifdef USE_GENERIC_LOAD
 217   NULL,                         /* load_routine (defaults to SRECs) */
 218   NULL,                         /* download command */
 219   NULL,                         /* load response */
 220 #else
 221   mon960_load,                  /* load_routine (defaults to SRECs) */
 222   "do\n\r",                     /* download command */
 223   "Downloading\n\r",            /* load response */
 224 #endif
 225   "=>",                         /* monitor command prompt */
 226   "\n\r",                       /* end-of-command delimitor */
 227   NULL,                         /* optional command terminator */
 228   &mon960_ops,                  /* target operations */
 229   SERIAL_1_STOPBITS,            /* number of stop bits */
 230   mon960_regnames,              /* registers names */
 231   MONITOR_OPS_MAGIC             /* magic */
 232 };
 233
 234 static void
 235 mon960_open (args, from_tty)
 236      char *args;
 237      int from_tty;
 238 {
 239   char buf[64];
 240
 241   monitor_open (args, &mon960_cmds, from_tty);
 242
 243   /* Attempt to fetch the value of the first floating point register (fp0).
 244      If the monitor returns a string containing the word "Bad" we'll assume
 245      this processor has no floating point registers, and nullify the
 246      regnames entries that refer to FP registers.  */
 247
 248   monitor_printf (mon960_cmds.getreg.cmd, full_regnames[FP0_REGNUM]); /* di fp0 */
 249   if (monitor_expect_prompt (buf, sizeof(buf)) != -1)
 250     if (strstr(buf, "Bad") != NULL)
 251       {
 252         int i;
 253
 254         for (i = FP0_REGNUM; i < FP0_REGNUM + 4; i++)
 255             mon960_regnames[i] = NULL;
 256       }
 257 }
 258
 259 void
 260 _initialize_mon960 ()
 261 {
 262   memcpy(mon960_regnames, full_regnames, sizeof(full_regnames));
 263
 264   init_monitor_ops (&mon960_ops);
 265
 266   mon960_ops.to_shortname = "mon960"; /* for the target command */
 267   mon960_ops.to_longname = "Intel 960 MON960 monitor";
 268 #ifdef USE_GENERIC_LOAD
 269   mon960_ops.to_load = mon960_load_gen; /* FIXME - should go back and try "do" */
 270 #endif
 271   /* use SW breaks; target only supports 2 HW breakpoints */
 272   mon960_ops.to_insert_breakpoint = memory_insert_breakpoint;
 273   mon960_ops.to_remove_breakpoint = memory_remove_breakpoint;
 274
 275   mon960_ops.to_doc =
 276     "Use an Intel 960 board running the MON960 debug monitor.\n\
 277 Specify the serial device it is connected to (e.g. /dev/ttya).";
 278
 279   mon960_ops.to_open = mon960_open;
 280   add_target (&mon960_ops);
 281 }