gdb/mon960-rom.c

   1 /* Remote target glue for the Intel 960 MON960 ROM monitor.
   2    Copyright 1995, 1996, 1997, 1998, 1999, 2000
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22
  23 #include "defs.h"
  24 #include "gdbcore.h"
  25 #include "target.h"
  26 #include "monitor.h"
  27 #include "serial.h"
  28 #include "srec.h"
  29 #include "xmodem.h"
  30 #include "symtab.h"
  31 #include "symfile.h"            /* for generic_load */
  32 #include "inferior.h"           /* for write_pc() */
  33
  34 #define USE_GENERIC_LOAD
  35
  36 static struct target_ops mon960_ops;
  37
  38 static void mon960_open (char *args, int from_tty);
  39
  40 #ifdef USE_GENERIC_LOAD
  41
  42 static void
  43 mon960_load_gen (char *filename, int from_tty)
  44 {
  45   generic_load (filename, from_tty);
  46   /* Finally, make the PC point at the start address */
  47   if (exec_bfd)
  48     write_pc (bfd_get_start_address (exec_bfd));
  49
  50   inferior_ptid = null_ptid;            /* No process now */
  51 }
  52
  53 #else
  54
  55 static void
  56 mon960_load (serial_t desc, char *file, int hashmark)
  57 {
  58   bfd *abfd;
  59   asection *s;
  60   char *buffer;
  61   int i;
  62
  63   buffer = alloca (XMODEM_PACKETSIZE);
  64   abfd = bfd_openr (file, 0);
  65   if (!abfd)
  66     {
  67       printf_filtered ("Unable to open file %s\n", file);
  68       return;
  69     }
  70   if (bfd_check_format (abfd, bfd_object) == 0)
  71     {
  72       printf_filtered ("File is not an object file\n");
  73       return;
  74     }
  75   for (s = abfd->sections; s; s = s->next)
  76     if (s->flags & SEC_LOAD)
  77       {
  78         bfd_size_type section_size;
  79         printf_filtered ("%s\t: 0x%4x .. 0x%4x  ", s->name, s->vma,
  80                          s->vma + s->_raw_size);
  81         gdb_flush (gdb_stdout);
  82         monitor_printf (current_monitor->load, s->vma);
  83         if (current_monitor->loadresp)
  84           monitor_expect (current_monitor->loadresp, NULL, 0);
  85         xmodem_init_xfer (desc);
  86         section_size = bfd_section_size (abfd, s);
  87         for (i = 0; i < section_size; i += XMODEM_DATASIZE)
  88           {
  89             int numbytes;
  90             numbytes = min (XMODEM_DATASIZE, section_size - i);
  91             bfd_get_section_contents (abfd, s, buffer + XMODEM_DATAOFFSET, i,
  92                                       numbytes);
  93             xmodem_send_packet (desc, buffer, numbytes, hashmark);
  94             if (hashmark)
  95               {
  96                 putchar_unfiltered ('#');
  97                 gdb_flush (gdb_stdout);
  98               }
  99           }                     /* Per-packet (or S-record) loop */
 100         xmodem_finish_xfer (desc);
 101         monitor_expect_prompt (NULL, 0);
 102         putchar_unfiltered ('\n');
 103       }                         /* Loadable sections */
 104   if (hashmark)
 105     putchar_unfiltered ('\n');
 106 }
 107
 108 #endif /* USE_GENERIC_LOAD */
 109
 110 /* This array of registers need to match the indexes used by GDB.
 111    This exists because the various ROM monitors use different strings
 112    than does GDB, and don't necessarily support all the registers
 113    either. So, typing "info reg sp" becomes a "r30".  */
 114
 115 /* these correspond to the offsets from tm-* files from config directories */
 116 /* g0-g14, fp, pfp, sp, rip,r3-15, pc, ac, tc, fp0-3 */
 117 /* NOTE: "ip" is documented as "ir" in the Mon960 UG. */
 118 /* NOTE: "ir" can't be accessed... but there's an ip and rip. */
 119 static char *full_regnames[NUM_REGS] =
 120 {
 121   /*  0 */ "pfp", "sp", "rip", "r3", "r4", "r5", "r6", "r7",
 122   /*  8 */ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
 123   /* 16 */ "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
 124   /* 24 */ "g8", "g9", "g10", "g11", "g12", "g13", "g14", "fp",
 125   /* 32 */ "pc", "ac", "tc", "ip", "fp0", "fp1", "fp2", "fp3",
 126 };
 127
 128 static char *mon960_regnames[NUM_REGS];
 129
 130 /* Define the monitor command strings. Since these are passed directly
 131    through to a printf style function, we may include formatting
 132    strings. We also need a CR or LF on the end.  */
 133
 134 /* need to pause the monitor for timing reasons, so slow it down */
 135
 136 #if 0
 137 /* FIXME: this extremely long init string causes MON960 to return two NAKS
 138    instead of performing the autobaud recognition, at least when gdb
 139    is running on GNU/Linux.  The short string below works on Linux, and on
 140    SunOS using a tcp serial connection.  Must retest on SunOS using a
 141    direct serial connection; if that works, get rid of the long string. */
 142 static char *mon960_inits[] =
 143 {"\n\r\r\r\r\r\r\r\r\r\r\r\r\r\r\n\r\n\r\n", NULL};
 144 #else
 145 static char *mon960_inits[] =
 146 {"\r", NULL};
 147 #endif
 148
 149 static struct monitor_ops mon960_cmds;
 150
 151 static void
 152 init_mon960_cmds (void)
 153 {
 154   mon960_cmds.flags = MO_CLR_BREAK_USES_ADDR
 155     | MO_NO_ECHO_ON_OPEN | MO_SEND_BREAK_ON_STOP | MO_GETMEM_READ_SINGLE;       /* flags */
 156   mon960_cmds.init = mon960_inits;      /* Init strings */
 157   mon960_cmds.cont = "go\n\r";  /* continue command */
 158   mon960_cmds.step = "st\n\r";  /* single step */
 159   mon960_cmds.stop = NULL;      /* break interrupts the program */
 160   mon960_cmds.set_break = NULL; /* set a breakpoint */
 161   mon960_cmds.clr_break =       /* can't use "br" because only 2 hw bps are supported */
 162     mon960_cmds.clr_all_break = NULL;   /* clear a breakpoint - "de" is for hw bps */
 163   NULL,                         /* clear all breakpoints */
 164     mon960_cmds.fill = NULL;    /* fill (start end val) */
 165   /* can't use "fi" because it takes words, not bytes */
 166   /* can't use "mb", "md" or "mo" because they require interaction */
 167   mon960_cmds.setmem.cmdb = NULL;       /* setmem.cmdb (addr, value) */
 168   mon960_cmds.setmem.cmdw = NULL;       /* setmem.cmdw (addr, value) */
 169   mon960_cmds.setmem.cmdl = "md %x %x\n\r";     /* setmem.cmdl (addr, value) */
 170   mon960_cmds.setmem.cmdll = NULL;      /* setmem.cmdll (addr, value) */
 171   mon960_cmds.setmem.resp_delim = NULL;         /* setmem.resp_delim */
 172   mon960_cmds.setmem.term = NULL;       /* setmem.term */
 173   mon960_cmds.setmem.term_cmd = NULL;   /* setmem.term_cmd */
 174   /* since the parsing of multiple bytes is difficult due to
 175      interspersed addresses, we'll only read 1 value at a time,
 176      even tho these can handle a count */
 177   mon960_cmds.getmem.cmdb = "db %x\n\r";        /* getmem.cmdb (addr, #bytes) */
 178   mon960_cmds.getmem.cmdw = "ds %x\n\r";        /* getmem.cmdw (addr, #swords) */
 179   mon960_cmds.getmem.cmdl = "di %x\n\r";        /* getmem.cmdl (addr, #words) */
 180   mon960_cmds.getmem.cmdll = "dd %x\n\r";       /* getmem.cmdll (addr, #dwords) */
 181   mon960_cmds.getmem.resp_delim = " : ";        /* getmem.resp_delim */
 182   mon960_cmds.getmem.term = NULL;       /* getmem.term */
 183   mon960_cmds.getmem.term_cmd = NULL;   /* getmem.term_cmd */
 184   mon960_cmds.setreg.cmd = "md %s %x\n\r";      /* setreg.cmd (name, value) */
 185   mon960_cmds.setreg.resp_delim = NULL;         /* setreg.resp_delim */
 186   mon960_cmds.setreg.term = NULL;       /* setreg.term */
 187   mon960_cmds.setreg.term_cmd = NULL,   /* setreg.term_cmd */
 188     mon960_cmds.getreg.cmd = "di %s\n\r";       /* getreg.cmd (name) */
 189   mon960_cmds.getreg.resp_delim = " : ";        /* getreg.resp_delim */
 190   mon960_cmds.getreg.term = NULL;       /* getreg.term */
 191   mon960_cmds.getreg.term_cmd = NULL;   /* getreg.term_cmd */
 192   mon960_cmds.dump_registers = "re\n\r";        /* dump_registers */
 193   mon960_cmds.register_pattern = "\\(\\w+\\)=\\([0-9a-fA-F]+\\)";       /* register_pattern */
 194   mon960_cmds.supply_register = NULL;   /* supply_register */
 195 #ifdef USE_GENERIC_LOAD
 196   mon960_cmds.load_routine = NULL;      /* load_routine (defaults to SRECs) */
 197   mon960_cmds.load = NULL;      /* download command */
 198   mon960_cmds.loadresp = NULL;  /* load response */
 199 #else
 200   mon960_cmds.load_routine = mon960_load;       /* load_routine (defaults to SRECs) */
 201   mon960_cmds.load = "do\n\r";  /* download command */
 202   mon960_cmds.loadresp = "Downloading\n\r";     /* load response */
 203 #endif
 204   mon960_cmds.prompt = "=>";    /* monitor command prompt */
 205   mon960_cmds.line_term = "\n\r";       /* end-of-command delimitor */
 206   mon960_cmds.cmd_end = NULL;   /* optional command terminator */
 207   mon960_cmds.target = &mon960_ops;     /* target operations */
 208   mon960_cmds.stopbits = SERIAL_1_STOPBITS;     /* number of stop bits */
 209   mon960_cmds.regnames = mon960_regnames;       /* registers names */
 210   mon960_cmds.magic = MONITOR_OPS_MAGIC;        /* magic */
 211 };
 212
 213 static void
 214 mon960_open (char *args, int from_tty)
 215 {
 216   char buf[64];
 217
 218   monitor_open (args, &mon960_cmds, from_tty);
 219
 220   /* Attempt to fetch the value of the first floating point register (fp0).
 221      If the monitor returns a string containing the word "Bad" we'll assume
 222      this processor has no floating point registers, and nullify the
 223      regnames entries that refer to FP registers.  */
 224
 225   monitor_printf (mon960_cmds.getreg.cmd, full_regnames[FP0_REGNUM]);   /* di fp0 */
 226   if (monitor_expect_prompt (buf, sizeof (buf)) != -1)
 227     if (strstr (buf, "Bad") != NULL)
 228       {
 229         int i;
 230
 231         for (i = FP0_REGNUM; i < FP0_REGNUM + 4; i++)
 232           mon960_regnames[i] = NULL;
 233       }
 234 }
 235
 236 void
 237 _initialize_mon960 (void)
 238 {
 239   memcpy (mon960_regnames, full_regnames, sizeof (full_regnames));
 240
 241   init_mon960_cmds ();
 242
 243   init_monitor_ops (&mon960_ops);
 244
 245   mon960_ops.to_shortname = "mon960";   /* for the target command */
 246   mon960_ops.to_longname = "Intel 960 MON960 monitor";
 247 #ifdef USE_GENERIC_LOAD
 248   mon960_ops.to_load = mon960_load_gen;         /* FIXME - should go back and try "do" */
 249 #endif
 250   /* use SW breaks; target only supports 2 HW breakpoints */
 251   mon960_ops.to_insert_breakpoint = memory_insert_breakpoint;
 252   mon960_ops.to_remove_breakpoint = memory_remove_breakpoint;
 253
 254   mon960_ops.to_doc =
 255     "Use an Intel 960 board running the MON960 debug monitor.\n\
 256 Specify the serial device it is connected to (e.g. /dev/ttya).";
 257
 258   mon960_ops.to_open = mon960_open;
 259   add_target (&mon960_ops);
 260 }