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
  32 #define USE_GENERIC_LOAD
  33
  34 static struct target_ops mon960_ops;
  35
  36 static void mon960_open PARAMS ((char *args, int from_tty));
  37
  38 #ifdef USE_GENERIC_LOAD
  39
  40 static void
  41 mon960_load_gen (filename, from_tty)
  42     char *filename;
  43     int from_tty;
  44 {
  45   extern int inferior_pid;
  46
  47   generic_load (filename, from_tty);
  48   /* Finally, make the PC point at the start address */
  49   if (exec_bfd)
  50     write_pc (bfd_get_start_address (exec_bfd));
  51
  52   inferior_pid = 0;             /* No process now */
  53 }
  54
  55 #else
  56
  57 static void
  58 mon960_load (desc, file, hashmark)
  59      serial_t desc;
  60      char *file;
  61      int hashmark;
  62 {
  63   bfd *abfd;
  64   asection *s;
  65   char *buffer;
  66   int i;
  67
  68   buffer = alloca (XMODEM_PACKETSIZE);
  69   abfd = bfd_openr (file, 0);
  70   if (!abfd)
  71     {
  72       printf_filtered ("Unable to open file %s\n", file);
  73       return;
  74     }
  75   if (bfd_check_format (abfd, bfd_object) == 0)
  76     {
  77       printf_filtered ("File is not an object file\n");
  78       return;
  79     }
  80   for (s = abfd->sections; s; s = s->next)
  81     if (s->flags & SEC_LOAD)
  82       {
  83         bfd_size_type section_size;
  84         printf_filtered ("%s\t: 0x%4x .. 0x%4x  ", s->name, s->vma,
  85                          s->vma + s->_raw_size);
  86         gdb_flush (gdb_stdout);
  87         monitor_printf (current_monitor->load, s->vma);
  88         if (current_monitor->loadresp)
  89           monitor_expect (current_monitor->loadresp, NULL, 0);
  90         xmodem_init_xfer (desc);
  91         section_size = bfd_section_size (abfd, s);
  92         for (i = 0; i < section_size; i += XMODEM_DATASIZE)
  93           {
  94             int numbytes;
  95             numbytes = min (XMODEM_DATASIZE, section_size - i);
  96             bfd_get_section_contents (abfd, s, buffer + XMODEM_DATAOFFSET, i,
  97                                       numbytes);
  98             xmodem_send_packet (desc, buffer, numbytes, hashmark);
  99             if (hashmark)
 100               {
 101                 putchar_unfiltered ('#');
 102                 gdb_flush (gdb_stdout);
 103               }
 104           }                     /* Per-packet (or S-record) loop */
 105         xmodem_finish_xfer (desc);
 106         monitor_expect_prompt (NULL, 0);
 107         putchar_unfiltered ('\n');
 108       }                         /* Loadable sections */
 109   if (hashmark)
 110     putchar_unfiltered ('\n');
 111 }
 112
 113 #endif /* USE_GENERIC_LOAD */
 114
 115 /* This array of registers need to match the indexes used by GDB.
 116    This exists because the various ROM monitors use different strings
 117    than does GDB, and don't necessarily support all the registers
 118    either. So, typing "info reg sp" becomes a "r30".  */
 119
 120 /* these correspond to the offsets from tm-* files from config directories */
 121 /* g0-g14, fp, pfp, sp, rip,r3-15, pc, ac, tc, fp0-3 */
 122 /* NOTE: "ip" is documented as "ir" in the Mon960 UG. */
 123 /* NOTE: "ir" can't be accessed... but there's an ip and rip. */
 124 static char *full_regnames[NUM_REGS] = {
 125   /*  0 */ "pfp", "sp",  "rip", "r3",  "r4",  "r5",  "r6",  "r7",
 126   /*  8 */ "r8",  "r9",  "r10", "r11", "r12", "r13", "r14", "r15",
 127   /* 16 */ "g0",  "g1",  "g2",  "g3",  "g4",  "g5",  "g6",  "g7",
 128   /* 24 */ "g8",  "g9",  "g10", "g11", "g12", "g13", "g14", "fp",
 129   /* 32 */ "pc",  "ac",  "tc",  "ip",  "fp0", "fp1", "fp2", "fp3",
 130   };
 131
 132 static char *mon960_regnames[NUM_REGS];
 133
 134 /* Define the monitor command strings. Since these are passed directly
 135    through to a printf style function, we may include formatting
 136    strings. We also need a CR or LF on the end.  */
 137
 138 /* need to pause the monitor for timing reasons, so slow it down */
 139
 140 #if 0
 141 /* FIXME: this extremely long init string causes MON960 to return two NAKS
 142    instead of performing the autobaud recognition, at least when gdb
 143    is running on Linux.  The short string below works on Linux, and on
 144    SunOS using a tcp serial connection.  Must retest on SunOS using a
 145    direct serial connection; if that works, get rid of the long string. */
 146 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};
 147 #else
 148 static char *mon960_inits[] = { "\r", NULL};
 149 #endif
 150
 151 static struct monitor_ops mon960_cmds =
 152 {
 153   MO_CLR_BREAK_USES_ADDR
 154     | MO_NO_ECHO_ON_OPEN
 155     | MO_SEND_BREAK_ON_STOP
 156     | MO_GETMEM_READ_SINGLE,    /* flags */
 157   mon960_inits,                 /* Init strings */
 158   "go\n\r",                     /* continue command */
 159   "st\n\r",                     /* single step */
 160   NULL,                         /* break interrupts the program */
 161   NULL,                         /* set a breakpoint */
 162                                 /* can't use "br" because only 2 hw bps are supported */
 163   NULL,                         /* clear a breakpoint - "de" is for hw bps */
 164   NULL,                         /* clear all breakpoints */
 165   NULL,                         /* fill (start end val) */
 166                                 /* can't use "fi" because it takes words, not bytes */
 167   {
 168     /* can't use "mb", "md" or "mo" because they require interaction */
 169     NULL,                       /* setmem.cmdb (addr, value) */
 170     NULL,                       /* setmem.cmdw (addr, value) */
 171     "md %x %x\n\r",             /* setmem.cmdl (addr, value) */
 172     NULL,                       /* setmem.cmdll (addr, value) */
 173     NULL,                       /* setmem.resp_delim */
 174     NULL,                       /* setmem.term */
 175     NULL,                       /* setmem.term_cmd */
 176   },
 177   {
 178     /* since the parsing of multiple bytes is difficult due to
 179        interspersed addresses, we'll only read 1 value at a time,
 180        even tho these can handle a count */
 181     "db %x\n\r",                /* getmem.cmdb (addr, #bytes) */
 182     "ds %x\n\r",                /* getmem.cmdw (addr, #swords) */
 183     "di %x\n\r",                /* getmem.cmdl (addr, #words) */
 184     "dd %x\n\r",                /* getmem.cmdll (addr, #dwords) */
 185     " : ",                      /* getmem.resp_delim */
 186     NULL,                       /* getmem.term */
 187     NULL,                       /* getmem.term_cmd */
 188   },
 189   {
 190     "md %s %x\n\r",             /* setreg.cmd (name, value) */
 191     NULL,                       /* setreg.resp_delim */
 192     NULL,                       /* setreg.term */
 193     NULL                        /* setreg.term_cmd */
 194   },
 195   {
 196     "di %s\n\r",                /* getreg.cmd (name) */
 197     " : ",                      /* getreg.resp_delim */
 198     NULL,                       /* getreg.term */
 199     NULL,                       /* getreg.term_cmd */
 200   },
 201   "re\n\r",                     /* dump_registers */
 202   "\\(\\w+\\)=\\([0-9a-fA-F]+\\)",      /* register_pattern */
 203   NULL,                         /* supply_register */
 204 #ifdef USE_GENERIC_LOAD
 205   NULL,                         /* load_routine (defaults to SRECs) */
 206   NULL,                         /* download command */
 207   NULL,                         /* load response */
 208 #else
 209   mon960_load,                  /* load_routine (defaults to SRECs) */
 210   "do\n\r",                     /* download command */
 211   "Downloading\n\r",            /* load response */
 212 #endif
 213   "=>",                         /* monitor command prompt */
 214   "\n\r",                       /* end-of-command delimitor */
 215   NULL,                         /* optional command terminator */
 216   &mon960_ops,                  /* target operations */
 217   SERIAL_1_STOPBITS,            /* number of stop bits */
 218   mon960_regnames,              /* registers names */
 219   MONITOR_OPS_MAGIC             /* magic */
 220 };
 221
 222 static void
 223 mon960_open (args, from_tty)
 224      char *args;
 225      int from_tty;
 226 {
 227   char buf[64];
 228
 229   monitor_open (args, &mon960_cmds, from_tty);
 230
 231   /* Attempt to fetch the value of the first floating point register (fp0).
 232      If the monitor returns a string containing the word "Bad" we'll assume
 233      this processor has no floating point registers, and nullify the
 234      regnames entries that refer to FP registers.  */
 235
 236   monitor_printf (mon960_cmds.getreg.cmd, full_regnames[FP0_REGNUM]); /* di fp0 */
 237   if (monitor_expect_prompt (buf, sizeof(buf)) != -1)
 238     if (strstr(buf, "Bad") != NULL)
 239       {
 240         int i;
 241
 242         for (i = FP0_REGNUM; i < FP0_REGNUM + 4; i++)
 243             mon960_regnames[i] = NULL;
 244       }
 245 }
 246
 247 void
 248 _initialize_mon960 ()
 249 {
 250   memcpy(mon960_regnames, full_regnames, sizeof(full_regnames));
 251
 252   init_monitor_ops (&mon960_ops);
 253
 254   mon960_ops.to_shortname = "mon960"; /* for the target command */
 255   mon960_ops.to_longname = "Intel 960 MON960 monitor";
 256 #ifdef USE_GENERIC_LOAD
 257   mon960_ops.to_load = mon960_load_gen; /* FIXME - should go back and try "do" */
 258 #endif
 259   /* use SW breaks; target only supports 2 HW breakpoints */
 260   mon960_ops.to_insert_breakpoint = memory_insert_breakpoint;
 261   mon960_ops.to_remove_breakpoint = memory_remove_breakpoint;
 262
 263   mon960_ops.to_doc =
 264     "Use an Intel 960 board running the MON960 debug monitor.\n\
 265 Specify the serial device it is connected to (e.g. /dev/ttya).";
 266
 267   mon960_ops.to_open = mon960_open;
 268   add_target (&mon960_ops);
 269 }