gdb/mcore-rom.c

   1 /* Remote debugging interface to Motorola picobug monitor for gdb,
   2    the GNU debugger.
   3    Copyright 1999, 2000, 2001 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 #include "defs.h"
  23 #include "gdbcore.h"
  24 #include "target.h"
  25 #include "monitor.h"
  26 #include "gdb_string.h"
  27 #include "regcache.h"
  28
  29 /* Functions used only in this file. */
  30
  31 static void init_picobug_cmds (void);
  32
  33
  34 /* Functions exported from this file. */
  35
  36 void _initialize_picobug_rom (void);
  37
  38 void picobug_open (char *args, int from_tty);
  39
  40 int picobug_dumpregs (void);
  41
  42
  43 static char *picobug_inits[] =
  44 {"\r", NULL};
  45
  46 static struct target_ops picobug_ops;
  47 static struct monitor_ops picobug_cmds;
  48
  49 /* Picobug only supports a subset of registers from MCore. In reality,
  50    it doesn't support ss1, either. */
  51 /* *INDENT-OFF* */
  52 static char *picobug_regnames[] = {
  53   "r0",   "r1",   "r2",   "r3",   "r4",   "r5",   "r6",   "r7",
  54   "r8",   "r9",   "r10",  "r11",  "r12",  "r13",  "r14",  "r15",
  55   0,      0,      0,      0,      0,      0,      0,      0,
  56   0,      0,      0,      0,      0,      0,      0,      0,
  57   "psr",  "vbr",  "epsr", "fpsr", "epc",  "fpc",  0,      "ss1",
  58   "ss2",  "ss3",  "ss4",  0,      0,      0,      0,      0,
  59   0,      0,      0,      0,      0,      0,      0,      0,
  60   0,      0,      0,      0,      0,      0,      0,      0,
  61   "pc" };
  62 /* *INDENT-ON* */
  63
  64
  65
  66 void
  67 picobug_open (char *args, int from_tty)
  68 {
  69   monitor_open (args, &picobug_cmds, from_tty);
  70 }
  71 /* *INDENT-OFF* */
  72 /* We choose to write our own dumpregs routine, since the output of
  73    the register dumping is rather difficult to encapsulate in a
  74    regexp:
  75
  76 picobug> rd
  77      pc 2f00031e      epc 2f00031e      fpc 00000000
  78     psr 80000101     epsr 80000101     fpsr 00000000
  79 ss0-ss4 bad0beef 00000000 00000000 00000000 00000000      vbr 30005c00
  80   r0-r7 2f0fff4c 00000090 00000001 00000002 00000003 00000004 00000005 00000006
  81  r8-r15 2f0fff64 00000000 00000000 00000000 00000000 00000000 00000000 2f00031e */
  82 /* *INDENT-ON* */
  83
  84
  85
  86 int
  87 picobug_dumpregs (void)
  88 {
  89   char buf[1024];
  90   int resp_len;
  91   char *p;
  92
  93   /* Send the dump register command to the monitor and
  94      get the reply. */
  95   monitor_printf (picobug_cmds.dump_registers);
  96   resp_len = monitor_expect_prompt (buf, sizeof (buf));
  97
  98   p = strtok (buf, " \t\r\n");
  99   while (p)
 100     {
 101       if (strchr (p, '-'))
 102         {
 103           /* got a range. either r0-r7, r8-r15 or ss0-ss4 */
 104           if (STREQN (p, "r0", 2) || STREQN (p, "r8", 2))
 105             {
 106               int rn = (p[1] == '0' ? 0 : 8);
 107               int i = 0;
 108
 109               /* Get the next 8 values and record them. */
 110               while (i < 8)
 111                 {
 112                   p = strtok (NULL, " \t\r\n");
 113                   if (p)
 114                     monitor_supply_register (rn + i, p);
 115                   i++;
 116                 }
 117             }
 118           else if (STREQN (p, "ss", 2))
 119             {
 120               /* get the next five values, ignoring the first */
 121               int rn;
 122               p = strtok (NULL, " \t\r\n");
 123               for (rn = 39; rn < 43; rn++)
 124                 {
 125                   p = strtok (NULL, " \t\r\n");
 126                   if (p)
 127                     monitor_supply_register (rn, p);
 128                 }
 129             }
 130           else
 131             {
 132               break;
 133             }
 134         }
 135       else
 136         {
 137           /* Simple register type, paired */
 138           char *name = p;
 139           int i;
 140
 141           /* Get and record value */
 142           p = strtok (NULL, " \t\r\n");
 143           if (p)
 144             {
 145               for (i = 0; i < NUM_REGS; i++)
 146                 {
 147                   if (picobug_regnames[i] && STREQ (picobug_regnames[i], name))
 148                     break;
 149                 }
 150
 151               if (i <= NUM_REGS)
 152                 monitor_supply_register (i, p);
 153             }
 154         }
 155       p = strtok (NULL, " \t\r\n");
 156     }
 157
 158   return 0;
 159 }
 160
 161 static void
 162 init_picobug_cmds (void)
 163 {
 164   picobug_cmds.flags = MO_GETMEM_NEEDS_RANGE | MO_CLR_BREAK_USES_ADDR | MO_PRINT_PROGRAM_OUTPUT;
 165
 166   picobug_cmds.init = picobug_inits;    /* Init strings                       */
 167   picobug_cmds.cont = "g\n";    /* continue command                   */
 168   picobug_cmds.step = "s\n";    /* single step                        */
 169   picobug_cmds.set_break = "br %x\n";   /* set a breakpoint                   */
 170   picobug_cmds.clr_break = "nobr %x\n";         /* clear a breakpoint                 */
 171   picobug_cmds.clr_all_break = "nobr\n";        /* clear all breakpoints              */
 172   picobug_cmds.setmem.cmdb = "mm %x %x ;b\n";   /* setmem.cmdb (addr, value)          */
 173   picobug_cmds.setmem.cmdw = "mm %x %x ;h\n";   /* setmem.cmdw (addr, value)          */
 174   picobug_cmds.setmem.cmdl = "mm %x %x ;w\n";   /* setmem.cmdl (addr, value)          */
 175   picobug_cmds.getmem.cmdb = "md %x %x\n";      /* getmem.cmdb (start addr, end addr) */
 176   picobug_cmds.getmem.resp_delim = ":";         /* getmem.resp_delim                  */
 177   picobug_cmds.setreg.cmd = "rm %s %x\n";       /* setreg.cmd (name, value)           */
 178   picobug_cmds.getreg.cmd = "rd %s\n";  /* getreg.cmd (name)                  */
 179   picobug_cmds.getreg.resp_delim = ":";         /* getreg.resp_delim                  */
 180   picobug_cmds.dump_registers = "rd\n";         /* dump_registers                     */
 181   picobug_cmds.dumpregs = picobug_dumpregs;     /* dump registers parser              */
 182   picobug_cmds.load = "lo\n";   /* download command                   */
 183   picobug_cmds.prompt = "picobug> ";    /* monitor command prompt             */
 184   picobug_cmds.line_term = "\n";        /* end-of-line terminator             */
 185   picobug_cmds.target = &picobug_ops;   /* target operations                  */
 186   picobug_cmds.stopbits = SERIAL_1_STOPBITS;    /* number of stop bits                */
 187   picobug_cmds.regnames = picobug_regnames;     /* registers names                    */
 188   picobug_cmds.num_breakpoints = 20;    /* number of breakpoints              */
 189   picobug_cmds.magic = MONITOR_OPS_MAGIC;       /* magic                              */
 190 }
 191
 192 void
 193 _initialize_picobug_rom (void)
 194 {
 195   int i;
 196
 197   /* Initialize m32r RevC monitor target */
 198   init_picobug_cmds ();
 199   init_monitor_ops (&picobug_ops);
 200   picobug_ops.to_shortname = "picobug";
 201   picobug_ops.to_longname = "picobug monitor";
 202   picobug_ops.to_doc = "Debug via the picobug monitor.\n\
 203 Specify the serial device it is connected to (e.g. /dev/ttya).";
 204   picobug_ops.to_open = picobug_open;
 205
 206   add_target (&picobug_ops);
 207 }