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 GNU/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 static void
 154 init_mon960_cmds (void)
 155 {
 156   mon960_cmds.flags =   MO_CLR_BREAK_USES_ADDR
 157     | MO_NO_ECHO_ON_OPEN   | MO_SEND_BREAK_ON_STOP   | MO_GETMEM_READ_SINGLE ;    /* flags */
 158   mon960_cmds.init =   mon960_inits;    /* Init strings */
 159   mon960_cmds.cont =   "go\n\r";        /* continue command */
 160   mon960_cmds.step =   "st\n\r";                /* single step */
 161   mon960_cmds.stop =   NULL;                    /* break interrupts the program */
 162   mon960_cmds.set_break =   NULL;               /* set a breakpoint */
 163   mon960_cmds.clr_break =                       /* can't use "br" because only 2 hw bps are supported */
 164     mon960_cmds.clr_all_break =   NULL;         /* clear a breakpoint - "de" is for hw bps */
 165   NULL,                         /* clear all breakpoints */
 166     mon960_cmds.fill =   NULL;                  /* fill (start end val) */
 167   /* can't use "fi" because it takes words, not bytes */
 168   /* can't use "mb", "md" or "mo" because they require interaction */
 169   mon960_cmds.setmem.cmdb =     NULL;           /* setmem.cmdb (addr, value) */
 170   mon960_cmds.setmem.cmdw =     NULL;           /* setmem.cmdw (addr, value) */
 171   mon960_cmds.setmem.cmdl =     "md %x %x\n\r"; /* setmem.cmdl (addr, value) */
 172   mon960_cmds.setmem.cmdll =     NULL;          /* setmem.cmdll (addr, value) */
 173   mon960_cmds.setmem.resp_delim =     NULL;     /* setmem.resp_delim */
 174   mon960_cmds.setmem.term =     NULL;           /* setmem.term */
 175   mon960_cmds.setmem.term_cmd =     NULL;                       /* setmem.term_cmd */
 176   /* since the parsing of multiple bytes is difficult due to
 177      interspersed addresses, we'll only read 1 value at a time,
 178      even tho these can handle a count */
 179   mon960_cmds.getmem.cmdb =     "db %x\n\r";    /* getmem.cmdb (addr, #bytes) */
 180   mon960_cmds.getmem.cmdw =     "ds %x\n\r";    /* getmem.cmdw (addr, #swords) */
 181   mon960_cmds.getmem.cmdl =     "di %x\n\r";    /* getmem.cmdl (addr, #words) */
 182   mon960_cmds.getmem.cmdll =     "dd %x\n\r";   /* getmem.cmdll (addr, #dwords) */
 183   mon960_cmds.getmem.resp_delim =     " : ";    /* getmem.resp_delim */
 184   mon960_cmds.getmem.term =     NULL;           /* getmem.term */
 185   mon960_cmds.getmem.term_cmd =     NULL;       /* getmem.term_cmd */
 186   mon960_cmds.setreg.cmd =     "md %s %x\n\r";  /* setreg.cmd (name, value) */
 187   mon960_cmds.setreg.resp_delim =     NULL;     /* setreg.resp_delim */
 188   mon960_cmds.setreg.term =     NULL;           /* setreg.term */
 189   mon960_cmds.setreg.term_cmd =     NULL,       /* setreg.term_cmd */
 190     mon960_cmds.getreg.cmd =     "di %s\n\r";   /* getreg.cmd (name) */
 191   mon960_cmds.getreg.resp_delim =     " : ";    /* getreg.resp_delim */
 192   mon960_cmds.getreg.term =     NULL;           /* getreg.term */
 193   mon960_cmds.getreg.term_cmd =     NULL;       /* getreg.term_cmd */
 194   mon960_cmds.dump_registers =   "re\n\r";      /* dump_registers */
 195   mon960_cmds.register_pattern =   "\\(\\w+\\)=\\([0-9a-fA-F]+\\)";     /* register_pattern */
 196   mon960_cmds.supply_register =   NULL;         /* supply_register */
 197 #ifdef USE_GENERIC_LOAD
 198   mon960_cmds.load_routine =   NULL;            /* load_routine (defaults to SRECs) */
 199   mon960_cmds.load = NULL;                      /* download command */
 200   mon960_cmds.loadresp  = NULL;                 /* load response */
 201 #else
 202   mon960_cmds.load_routine =   mon960_load ;    /* load_routine (defaults to SRECs) */
 203   mon960_cmds.load =  "do\n\r";         /* download command */
 204   mon960_cmds.loadresp =  "Downloading\n\r" ;/* load response */
 205 #endif
 206   mon960_cmds.prompt =   "=>";          /* monitor command prompt */
 207   mon960_cmds.line_term =  "\n\r";              /* end-of-command delimitor */
 208   mon960_cmds.cmd_end = NULL;           /* optional command terminator */
 209   mon960_cmds.target =   &mon960_ops;           /* target operations */
 210   mon960_cmds.stopbits =     SERIAL_1_STOPBITS; /* number of stop bits */
 211   mon960_cmds.regnames =  mon960_regnames;      /* registers names */
 212   mon960_cmds.magic = MONITOR_OPS_MAGIC;        /* magic */
 213 };
 214
 215 static void
 216 mon960_open (args, from_tty)
 217      char *args;
 218      int from_tty;
 219 {
 220   char buf[64];
 221
 222   monitor_open (args, &mon960_cmds, from_tty);
 223
 224   /* Attempt to fetch the value of the first floating point register (fp0).
 225      If the monitor returns a string containing the word "Bad" we'll assume
 226      this processor has no floating point registers, and nullify the
 227      regnames entries that refer to FP registers.  */
 228
 229   monitor_printf (mon960_cmds.getreg.cmd, full_regnames[FP0_REGNUM]); /* di fp0 */
 230   if (monitor_expect_prompt (buf, sizeof(buf)) != -1)
 231     if (strstr(buf, "Bad") != NULL)
 232       {
 233         int i;
 234
 235         for (i = FP0_REGNUM; i < FP0_REGNUM + 4; i++)
 236             mon960_regnames[i] = NULL;
 237       }
 238 }
 239
 240 void
 241 _initialize_mon960 ()
 242 {
 243   memcpy(mon960_regnames, full_regnames, sizeof(full_regnames));
 244
 245   init_mon960_cmds ();
 246
 247   init_monitor_ops (&mon960_ops);
 248
 249   mon960_ops.to_shortname = "mon960"; /* for the target command */
 250   mon960_ops.to_longname = "Intel 960 MON960 monitor";
 251 #ifdef USE_GENERIC_LOAD
 252   mon960_ops.to_load = mon960_load_gen; /* FIXME - should go back and try "do" */
 253 #endif
 254   /* use SW breaks; target only supports 2 HW breakpoints */
 255   mon960_ops.to_insert_breakpoint = memory_insert_breakpoint;
 256   mon960_ops.to_remove_breakpoint = memory_remove_breakpoint;
 257
 258   mon960_ops.to_doc =
 259     "Use an Intel 960 board running the MON960 debug monitor.\n\
 260 Specify the serial device it is connected to (e.g. /dev/ttya).";
 261
 262   mon960_ops.to_open = mon960_open;
 263   add_target (&mon960_ops);
 264 }