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,
  19    Boston, MA 02111-1307, USA.  */
  20
  21
  22 #include "defs.h"
  23 #include "gdbcore.h"
  24 #include "target.h"
  25 #include "monitor.h"
  26 #include "serial.h"
  27 #include "srec.h"
  28 #include "xmodem.h"
  29 #include "symtab.h"
  30 #include "symfile.h"            /* for generic_load */
  31 #include "inferior.h"           /* for write_pc() */
  32
  33 #define USE_GENERIC_LOAD
  34
  35 static struct target_ops mon960_ops;
  36
  37 static void mon960_open (char *args, int from_tty);
  38
  39 #ifdef USE_GENERIC_LOAD
  40
  41 static void
  42 mon960_load_gen (filename, from_tty)
  43      char *filename;
  44      int from_tty;
  45 {
  46   extern int inferior_pid;
  47
  48   generic_load (filename, from_tty);
  49   /* Finally, make the PC point at the start address */
  50   if (exec_bfd)
  51     write_pc (bfd_get_start_address (exec_bfd));
  52
  53   inferior_pid = 0;             /* No process now */
  54 }
  55
  56 #else
  57
  58 static void
  59 mon960_load (desc, file, hashmark)
  60      serial_t desc;
  61      char *file;
  62      int hashmark;
  63 {
  64   bfd *abfd;
  65   asection *s;
  66   char *buffer;
  67   int i;
  68
  69   buffer = alloca (XMODEM_PACKETSIZE);
  70   abfd = bfd_openr (file, 0);
  71   if (!abfd)
  72     {
  73       printf_filtered ("Unable to open file %s\n", file);
  74       return;
  75     }
  76   if (bfd_check_format (abfd, bfd_object) == 0)
  77     {
  78       printf_filtered ("File is not an object file\n");
  79       return;
  80     }
  81   for (s = abfd->sections; s; s = s->next)
  82     if (s->flags & SEC_LOAD)
  83       {
  84         bfd_size_type section_size;
  85         printf_filtered ("%s\t: 0x%4x .. 0x%4x  ", s->name, s->vma,
  86                          s->vma + s->_raw_size);
  87         gdb_flush (gdb_stdout);
  88         monitor_printf (current_monitor->load, s->vma);
  89         if (current_monitor->loadresp)
  90           monitor_expect (current_monitor->loadresp, NULL, 0);
  91         xmodem_init_xfer (desc);
  92         section_size = bfd_section_size (abfd, s);
  93         for (i = 0; i < section_size; i += XMODEM_DATASIZE)
  94           {
  95             int numbytes;
  96             numbytes = min (XMODEM_DATASIZE, section_size - i);
  97             bfd_get_section_contents (abfd, s, buffer + XMODEM_DATAOFFSET, i,
  98                                       numbytes);
  99             xmodem_send_packet (desc, buffer, numbytes, hashmark);
 100             if (hashmark)
 101               {
 102                 putchar_unfiltered ('#');
 103                 gdb_flush (gdb_stdout);
 104               }
 105           }                     /* Per-packet (or S-record) loop */
 106         xmodem_finish_xfer (desc);
 107         monitor_expect_prompt (NULL, 0);
 108         putchar_unfiltered ('\n');
 109       }                         /* Loadable sections */
 110   if (hashmark)
 111     putchar_unfiltered ('\n');
 112 }
 113
 114 #endif /* USE_GENERIC_LOAD */
 115
 116 /* This array of registers need to match the indexes used by GDB.
 117    This exists because the various ROM monitors use different strings
 118    than does GDB, and don't necessarily support all the registers
 119    either. So, typing "info reg sp" becomes a "r30".  */
 120
 121 /* these correspond to the offsets from tm-* files from config directories */
 122 /* g0-g14, fp, pfp, sp, rip,r3-15, pc, ac, tc, fp0-3 */
 123 /* NOTE: "ip" is documented as "ir" in the Mon960 UG. */
 124 /* NOTE: "ir" can't be accessed... but there's an ip and rip. */
 125 static char *full_regnames[NUM_REGS] =
 126 {
 127   /*  0 */ "pfp", "sp", "rip", "r3", "r4", "r5", "r6", "r7",
 128   /*  8 */ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
 129   /* 16 */ "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
 130   /* 24 */ "g8", "g9", "g10", "g11", "g12", "g13", "g14", "fp",
 131   /* 32 */ "pc", "ac", "tc", "ip", "fp0", "fp1", "fp2", "fp3",
 132 };
 133
 134 static char *mon960_regnames[NUM_REGS];
 135
 136 /* Define the monitor command strings. Since these are passed directly
 137    through to a printf style function, we may include formatting
 138    strings. We also need a CR or LF on the end.  */
 139
 140 /* need to pause the monitor for timing reasons, so slow it down */
 141
 142 #if 0
 143 /* FIXME: this extremely long init string causes MON960 to return two NAKS
 144    instead of performing the autobaud recognition, at least when gdb
 145    is running on GNU/Linux.  The short string below works on Linux, and on
 146    SunOS using a tcp serial connection.  Must retest on SunOS using a
 147    direct serial connection; if that works, get rid of the long string. */
 148 static char *mon960_inits[] =
 149 {"\n\r\r\r\r\r\r\r\r\r\r\r\r\r\r\n\r\n\r\n", NULL};
 150 #else
 151 static char *mon960_inits[] =
 152 {"\r", NULL};
 153 #endif
 154
 155 static struct monitor_ops mon960_cmds;
 156
 157 static void
 158 init_mon960_cmds (void)
 159 {
 160   mon960_cmds.flags = MO_CLR_BREAK_USES_ADDR
 161     | MO_NO_ECHO_ON_OPEN | MO_SEND_BREAK_ON_STOP | MO_GETMEM_READ_SINGLE;       /* flags */
 162   mon960_cmds.init = mon960_inits;      /* Init strings */
 163   mon960_cmds.cont = "go\n\r";  /* continue command */
 164   mon960_cmds.step = "st\n\r";  /* single step */
 165   mon960_cmds.stop = NULL;      /* break interrupts the program */
 166   mon960_cmds.set_break = NULL; /* set a breakpoint */
 167   mon960_cmds.clr_break =       /* can't use "br" because only 2 hw bps are supported */
 168     mon960_cmds.clr_all_break = NULL;   /* clear a breakpoint - "de" is for hw bps */
 169   NULL,                         /* clear all breakpoints */
 170     mon960_cmds.fill = NULL;    /* fill (start end val) */
 171   /* can't use "fi" because it takes words, not bytes */
 172   /* can't use "mb", "md" or "mo" because they require interaction */
 173   mon960_cmds.setmem.cmdb = NULL;       /* setmem.cmdb (addr, value) */
 174   mon960_cmds.setmem.cmdw = NULL;       /* setmem.cmdw (addr, value) */
 175   mon960_cmds.setmem.cmdl = "md %x %x\n\r";     /* setmem.cmdl (addr, value) */
 176   mon960_cmds.setmem.cmdll = NULL;      /* setmem.cmdll (addr, value) */
 177   mon960_cmds.setmem.resp_delim = NULL;         /* setmem.resp_delim */
 178   mon960_cmds.setmem.term = NULL;       /* setmem.term */
 179   mon960_cmds.setmem.term_cmd = NULL;   /* setmem.term_cmd */
 180   /* since the parsing of multiple bytes is difficult due to
 181      interspersed addresses, we'll only read 1 value at a time,
 182      even tho these can handle a count */
 183   mon960_cmds.getmem.cmdb = "db %x\n\r";        /* getmem.cmdb (addr, #bytes) */
 184   mon960_cmds.getmem.cmdw = "ds %x\n\r";        /* getmem.cmdw (addr, #swords) */
 185   mon960_cmds.getmem.cmdl = "di %x\n\r";        /* getmem.cmdl (addr, #words) */
 186   mon960_cmds.getmem.cmdll = "dd %x\n\r";       /* getmem.cmdll (addr, #dwords) */
 187   mon960_cmds.getmem.resp_delim = " : ";        /* getmem.resp_delim */
 188   mon960_cmds.getmem.term = NULL;       /* getmem.term */
 189   mon960_cmds.getmem.term_cmd = NULL;   /* getmem.term_cmd */
 190   mon960_cmds.setreg.cmd = "md %s %x\n\r";      /* setreg.cmd (name, value) */
 191   mon960_cmds.setreg.resp_delim = NULL;         /* setreg.resp_delim */
 192   mon960_cmds.setreg.term = NULL;       /* setreg.term */
 193   mon960_cmds.setreg.term_cmd = NULL,   /* setreg.term_cmd */
 194     mon960_cmds.getreg.cmd = "di %s\n\r";       /* getreg.cmd (name) */
 195   mon960_cmds.getreg.resp_delim = " : ";        /* getreg.resp_delim */
 196   mon960_cmds.getreg.term = NULL;       /* getreg.term */
 197   mon960_cmds.getreg.term_cmd = NULL;   /* getreg.term_cmd */
 198   mon960_cmds.dump_registers = "re\n\r";        /* dump_registers */
 199   mon960_cmds.register_pattern = "\\(\\w+\\)=\\([0-9a-fA-F]+\\)";       /* register_pattern */
 200   mon960_cmds.supply_register = NULL;   /* supply_register */
 201 #ifdef USE_GENERIC_LOAD
 202   mon960_cmds.load_routine = NULL;      /* load_routine (defaults to SRECs) */
 203   mon960_cmds.load = NULL;      /* download command */
 204   mon960_cmds.loadresp = NULL;  /* load response */
 205 #else
 206   mon960_cmds.load_routine = mon960_load;       /* load_routine (defaults to SRECs) */
 207   mon960_cmds.load = "do\n\r";  /* download command */
 208   mon960_cmds.loadresp = "Downloading\n\r";     /* load response */
 209 #endif
 210   mon960_cmds.prompt = "=>";    /* monitor command prompt */
 211   mon960_cmds.line_term = "\n\r";       /* end-of-command delimitor */
 212   mon960_cmds.cmd_end = NULL;   /* optional command terminator */
 213   mon960_cmds.target = &mon960_ops;     /* target operations */
 214   mon960_cmds.stopbits = SERIAL_1_STOPBITS;     /* number of stop bits */
 215   mon960_cmds.regnames = mon960_regnames;       /* registers names */
 216   mon960_cmds.magic = MONITOR_OPS_MAGIC;        /* magic */
 217 };
 218
 219 static void
 220 mon960_open (args, from_tty)
 221      char *args;
 222      int from_tty;
 223 {
 224   char buf[64];
 225
 226   monitor_open (args, &mon960_cmds, from_tty);
 227
 228   /* Attempt to fetch the value of the first floating point register (fp0).
 229      If the monitor returns a string containing the word "Bad" we'll assume
 230      this processor has no floating point registers, and nullify the
 231      regnames entries that refer to FP registers.  */
 232
 233   monitor_printf (mon960_cmds.getreg.cmd, full_regnames[FP0_REGNUM]);   /* di fp0 */
 234   if (monitor_expect_prompt (buf, sizeof (buf)) != -1)
 235     if (strstr (buf, "Bad") != NULL)
 236       {
 237         int i;
 238
 239         for (i = FP0_REGNUM; i < FP0_REGNUM + 4; i++)
 240           mon960_regnames[i] = NULL;
 241       }
 242 }
 243
 244 void
 245 _initialize_mon960 ()
 246 {
 247   memcpy (mon960_regnames, full_regnames, sizeof (full_regnames));
 248
 249   init_mon960_cmds ();
 250
 251   init_monitor_ops (&mon960_ops);
 252
 253   mon960_ops.to_shortname = "mon960";   /* for the target command */
 254   mon960_ops.to_longname = "Intel 960 MON960 monitor";
 255 #ifdef USE_GENERIC_LOAD
 256   mon960_ops.to_load = mon960_load_gen;         /* FIXME - should go back and try "do" */
 257 #endif
 258   /* use SW breaks; target only supports 2 HW breakpoints */
 259   mon960_ops.to_insert_breakpoint = memory_insert_breakpoint;
 260   mon960_ops.to_remove_breakpoint = memory_remove_breakpoint;
 261
 262   mon960_ops.to_doc =
 263     "Use an Intel 960 board running the MON960 debug monitor.\n\
 264 Specify the serial device it is connected to (e.g. /dev/ttya).";
 265
 266   mon960_ops.to_open = mon960_open;
 267   add_target (&mon960_ops);
 268 }