gdb/microblaze-rom.c

   1 /* Remote debugging interface to Xilinx MicroBlaze.
   2
   3    Copyright (C) 2009-2013 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 3 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, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "gdbcore.h"
  22 #include "target.h"
  23 #include "monitor.h"
  24 #include "gdb_string.h"
  25 #include "serial.h"
  26 #include "regcache.h"
  27
  28 void _initialize_picobug_rom (void);
  29
  30 static char *picobug_inits[] =
  31 {"\r", NULL};
  32
  33 static struct target_ops picobug_ops;
  34 static struct monitor_ops picobug_cmds;
  35
  36 /* Picobug only supports a subset of registers from MCore.  In reality,
  37    it doesn't support ss1, either.  */
  38 static char *picobug_regnames[] = {
  39   "r0",   "r1",   "r2",   "r3",   "r4",   "r5",   "r6",   "r7",
  40   "r8",   "r9",   "r10",  "r11",  "r12",  "r13",  "r14",  "r15",
  41   0,      0,      0,      0,      0,      0,      0,      0,
  42   0,      0,      0,      0,      0,      0,      0,      0,
  43   "psr",  "vbr",  "epsr", "fpsr", "epc",  "fpc",  0,      "ss1",
  44   "ss2",  "ss3",  "ss4",  0,      0,      0,      0,      0,
  45   0,      0,      0,      0,      0,      0,      0,      0,
  46   0,      0,      0,      0,      0,      0,      0,      0,
  47   "pc" };
  48
  49
  50
  51 static void
  52 picobug_open (char *args, int from_tty)
  53 {
  54   monitor_open (args, &picobug_cmds, from_tty);
  55 }
  56 /* We choose to write our own dumpregs routine, since the output of
  57    the register dumping is rather difficult to encapsulate in a
  58    regexp:
  59
  60 picobug> rd
  61      pc 2f00031e      epc 2f00031e      fpc 00000000
  62     psr 80000101     epsr 80000101     fpsr 00000000
  63 ss0-ss4 bad0beef 00000000 00000000 00000000 00000000      vbr 30005c00
  64   r0-r7 2f0fff4c 00000090 00000001 00000002 00000003 00000004 00000005 00000006
  65  r8-r15 2f0fff64 00000000 00000000 00000000 00000000 00000000 00000000 2f00031e
  66 */
  67
  68 static int
  69 picobug_dumpregs (struct regcache *regcache)
  70 {
  71   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  72   char buf[1024];
  73   int resp_len;
  74   char *p;
  75
  76   /* Send the dump register command to the monitor and
  77      get the reply.  */
  78   monitor_printf (picobug_cmds.dump_registers);
  79   resp_len = monitor_expect_prompt (buf, sizeof (buf));
  80
  81   p = strtok (buf, " \t\r\n");
  82   while (p)
  83     {
  84       if (strchr (p, '-'))
  85         {
  86           /* Got a range.  Either r0-r7, r8-r15 or ss0-ss4.  */
  87           if (strncmp (p, "r0", 2) == 0 || strncmp (p, "r8", 2) == 0)
  88             {
  89               int rn = (p[1] == '0' ? 0 : 8);
  90               int i = 0;
  91
  92               /* Get the next 8 values and record them.  */
  93               while (i < 8)
  94                 {
  95                   p = strtok (NULL, " \t\r\n");
  96                   if (p)
  97                     monitor_supply_register (regcache, rn + i, p);
  98                   i++;
  99                 }
 100             }
 101           else if (strncmp (p, "ss", 2) == 0)
 102             {
 103               /* Get the next five values, ignoring the first.  */
 104               int rn;
 105               p = strtok (NULL, " \t\r\n");
 106               for (rn = 39; rn < 43; rn++)
 107                 {
 108                   p = strtok (NULL, " \t\r\n");
 109                   if (p)
 110                     monitor_supply_register (regcache, rn, p);
 111                 }
 112             }
 113           else
 114             {
 115               break;
 116             }
 117         }
 118       else
 119         {
 120           /* Simple register type, paired.  */
 121           char *name = p;
 122           int i;
 123
 124           /* Get and record value.  */
 125           p = strtok (NULL, " \t\r\n");
 126           if (p)
 127             {
 128               for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
 129                 {
 130                   if (picobug_regnames[i]
 131                       && strcmp (picobug_regnames[i], name) == 0)
 132                     break;
 133                 }
 134
 135               if (i <= gdbarch_num_regs (gdbarch))
 136                 monitor_supply_register (regcache, i, p);
 137             }
 138         }
 139       p = strtok (NULL, " \t\r\n");
 140     }
 141
 142   return 0;
 143 }
 144
 145 static void
 146 init_picobug_cmds (void)
 147 {
 148   picobug_cmds.flags = MO_GETMEM_NEEDS_RANGE | MO_CLR_BREAK_USES_ADDR
 149                        | MO_PRINT_PROGRAM_OUTPUT;
 150
 151   picobug_cmds.init = picobug_inits;            /* Init strings         */
 152   picobug_cmds.cont = "g\n";                    /* continue command     */
 153   picobug_cmds.step = "s\n";                    /* single step          */
 154   picobug_cmds.set_break = "br %x\n";           /* set a breakpoint     */
 155   picobug_cmds.clr_break = "nobr %x\n";         /* clear a breakpoint   */
 156   picobug_cmds.clr_all_break = "nobr\n";        /* clear all breakpoints */
 157   picobug_cmds.setmem.cmdb = "mm %x %x ;b\n";   /* setmem.cmdb (addr, value) */
 158   picobug_cmds.setmem.cmdw = "mm %x %x ;h\n";   /* setmem.cmdw (addr, value) */
 159   picobug_cmds.setmem.cmdl = "mm %x %x ;w\n";   /* setmem.cmdl (addr, value) */
 160   picobug_cmds.getmem.cmdb = "md %x %x\n";      /* getmem.cmdb (start addr,
 161                                                    end addr)            */
 162   picobug_cmds.getmem.resp_delim = ":";         /* getmem.resp_delim    */
 163   picobug_cmds.setreg.cmd = "rm %s %x\n";       /* setreg.cmd (name, value) */
 164   picobug_cmds.getreg.cmd = "rd %s\n";          /* getreg.cmd (name)    */
 165   picobug_cmds.getreg.resp_delim = ":";         /* getreg.resp_delim    */
 166   picobug_cmds.dump_registers = "rd\n";         /* dump_registers       */
 167   picobug_cmds.dumpregs = picobug_dumpregs;     /* dump registers parser */
 168   picobug_cmds.load = "lo\n";                   /* download command     */
 169   picobug_cmds.prompt = "picobug> ";            /* monitor command prompt */
 170   picobug_cmds.line_term = "\n";                /* end-of-line terminator */
 171   picobug_cmds.target = &picobug_ops;           /* target operations    */
 172   picobug_cmds.stopbits = SERIAL_1_STOPBITS;    /* number of stop bits  */
 173   picobug_cmds.regnames = picobug_regnames;     /* registers names      */
 174   picobug_cmds.num_breakpoints = 20;            /* number of breakpoints */
 175   picobug_cmds.magic = MONITOR_OPS_MAGIC;       /* magic                */
 176 }
 177
 178 void
 179 _initialize_picobug_rom (void)
 180 {
 181   int i;
 182
 183   /* Initialize m32r RevC monitor target.  */
 184   init_picobug_cmds ();
 185   init_monitor_ops (&picobug_ops);
 186   picobug_ops.to_shortname = "picobug";
 187   picobug_ops.to_longname = "picobug monitor";
 188   picobug_ops.to_doc = "Debug via the picobug monitor.\n\
 189 Specify the serial device it is connected to (e.g. /dev/ttya).";
 190   picobug_ops.to_open = picobug_open;
 191
 192   add_target (&picobug_ops);
 193 }