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   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 (serial_t desc, char *file, int hashmark)
  59 {
  60   bfd *abfd;
  61   asection *s;
  62   char *buffer;
  63   int i;
  64
  65   buffer = alloca (XMODEM_PACKETSIZE);
  66   abfd = bfd_openr (file, 0);
  67   if (!abfd)
  68     {
  69       printf_filtered ("Unable to open file %s\n", file);
  70       return;
  71     }
  72   if (bfd_check_format (abfd, bfd_object) == 0)
  73     {
  74       printf_filtered ("File is not an object file\n");
  75       return;
  76     }
  77   for (s = abfd->sections; s; s = s->next)
  78     if (s->flags & SEC_LOAD)
  79       {
  80         bfd_size_type section_size;
  81         printf_filtered ("%s\t: 0x%4x .. 0x%4x  ", s->name, s->vma,
  82                          s->vma + s->_raw_size);
  83         gdb_flush (gdb_stdout);
  84         monitor_printf (current_monitor->load, s->vma);
  85         if (current_monitor->loadresp)
  86           monitor_expect (current_monitor->loadresp, NULL, 0);
  87         xmodem_init_xfer (desc);
  88         section_size = bfd_section_size (abfd, s);
  89         for (i = 0; i < section_size; i += XMODEM_DATASIZE)
  90           {
  91             int numbytes;
  92             numbytes = min (XMODEM_DATASIZE, section_size - i);
  93             bfd_get_section_contents (abfd, s, buffer + XMODEM_DATAOFFSET, i,
  94                                       numbytes);
  95             xmodem_send_packet (desc, buffer, numbytes, hashmark);
  96             if (hashmark)
  97               {
  98                 putchar_unfiltered ('#');
  99                 gdb_flush (gdb_stdout);
 100               }
 101           }                     /* Per-packet (or S-record) loop */
 102         xmodem_finish_xfer (desc);
 103         monitor_expect_prompt (NULL, 0);
 104         putchar_unfiltered ('\n');
 105       }                         /* Loadable sections */
 106   if (hashmark)
 107     putchar_unfiltered ('\n');
 108 }
 109
 110 #endif /* USE_GENERIC_LOAD */
 111
 112 /* This array of registers need to match the indexes used by GDB.
 113    This exists because the various ROM monitors use different strings
 114    than does GDB, and don't necessarily support all the registers
 115    either. So, typing "info reg sp" becomes a "r30".  */
 116
 117 /* these correspond to the offsets from tm-* files from config directories */
 118 /* g0-g14, fp, pfp, sp, rip,r3-15, pc, ac, tc, fp0-3 */
 119 /* NOTE: "ip" is documented as "ir" in the Mon960 UG. */
 120 /* NOTE: "ir" can't be accessed... but there's an ip and rip. */
 121 static char *full_regnames[NUM_REGS] =
 122 {
 123   /*  0 */ "pfp", "sp", "rip", "r3", "r4", "r5", "r6", "r7",
 124   /*  8 */ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
 125   /* 16 */ "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
 126   /* 24 */ "g8", "g9", "g10", "g11", "g12", "g13", "g14", "fp",
 127   /* 32 */ "pc", "ac", "tc", "ip", "fp0", "fp1", "fp2", "fp3",
 128 };
 129
 130 static char *mon960_regnames[NUM_REGS];
 131
 132 /* Define the monitor command strings. Since these are passed directly
 133    through to a printf style function, we may include formatting
 134    strings. We also need a CR or LF on the end.  */
 135
 136 /* need to pause the monitor for timing reasons, so slow it down */
 137
 138 #if 0
 139 /* FIXME: this extremely long init string causes MON960 to return two NAKS
 140    instead of performing the autobaud recognition, at least when gdb
 141    is running on GNU/Linux.  The short string below works on Linux, and on
 142    SunOS using a tcp serial connection.  Must retest on SunOS using a
 143    direct serial connection; if that works, get rid of the long string. */
 144 static char *mon960_inits[] =
 145 {"\n\r\r\r\r\r\r\r\r\r\r\r\r\r\r\n\r\n\r\n", NULL};
 146 #else
 147 static char *mon960_inits[] =
 148 {"\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 (char *args, int from_tty)
 217 {
 218   char buf[64];
 219
 220   monitor_open (args, &mon960_cmds, from_tty);
 221
 222   /* Attempt to fetch the value of the first floating point register (fp0).
 223      If the monitor returns a string containing the word "Bad" we'll assume
 224      this processor has no floating point registers, and nullify the
 225      regnames entries that refer to FP registers.  */
 226
 227   monitor_printf (mon960_cmds.getreg.cmd, full_regnames[FP0_REGNUM]);   /* di fp0 */
 228   if (monitor_expect_prompt (buf, sizeof (buf)) != -1)
 229     if (strstr (buf, "Bad") != NULL)
 230       {
 231         int i;
 232
 233         for (i = FP0_REGNUM; i < FP0_REGNUM + 4; i++)
 234           mon960_regnames[i] = NULL;
 235       }
 236 }
 237
 238 void
 239 _initialize_mon960 (void)
 240 {
 241   memcpy (mon960_regnames, full_regnames, sizeof (full_regnames));
 242
 243   init_mon960_cmds ();
 244
 245   init_monitor_ops (&mon960_ops);
 246
 247   mon960_ops.to_shortname = "mon960";   /* for the target command */
 248   mon960_ops.to_longname = "Intel 960 MON960 monitor";
 249 #ifdef USE_GENERIC_LOAD
 250   mon960_ops.to_load = mon960_load_gen;         /* FIXME - should go back and try "do" */
 251 #endif
 252   /* use SW breaks; target only supports 2 HW breakpoints */
 253   mon960_ops.to_insert_breakpoint = memory_insert_breakpoint;
 254   mon960_ops.to_remove_breakpoint = memory_remove_breakpoint;
 255
 256   mon960_ops.to_doc =
 257     "Use an Intel 960 board running the MON960 debug monitor.\n\
 258 Specify the serial device it is connected to (e.g. /dev/ttya).";
 259
 260   mon960_ops.to_open = mon960_open;
 261   add_target (&mon960_ops);
 262 }