gdb/microblaze-rom.c

   1 /* Remote debugging interface to Xilinx MicroBlaze.
   2
   3    Copyright (C) 2009-2015 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 "serial.h"
  25 #include "regcache.h"
  26
  27 void _initialize_picobug_rom (void);
  28
  29 static char *picobug_inits[] =
  30 {"\r", NULL};
  31
  32 static struct target_ops picobug_ops;
  33 static struct monitor_ops picobug_cmds;
  34
  35 /* Picobug only supports a subset of registers from MCore.  In reality,
  36    it doesn't support ss1, either.  */
  37 static char *picobug_regnames[] = {
  38   "r0",   "r1",   "r2",   "r3",   "r4",   "r5",   "r6",   "r7",
  39   "r8",   "r9",   "r10",  "r11",  "r12",  "r13",  "r14",  "r15",
  40   0,      0,      0,      0,      0,      0,      0,      0,
  41   0,      0,      0,      0,      0,      0,      0,      0,
  42   "psr",  "vbr",  "epsr", "fpsr", "epc",  "fpc",  0,      "ss1",
  43   "ss2",  "ss3",  "ss4",  0,      0,      0,      0,      0,
  44   0,      0,      0,      0,      0,      0,      0,      0,
  45   0,      0,      0,      0,      0,      0,      0,      0,
  46   "pc" };
  47
  48
  49
  50 static void
  51 picobug_open (const char *args, int from_tty)
  52 {
  53   monitor_open (args, &picobug_cmds, from_tty);
  54 }
  55 /* We choose to write our own dumpregs routine, since the output of
  56    the register dumping is rather difficult to encapsulate in a
  57    regexp:
  58
  59 picobug> rd
  60      pc 2f00031e      epc 2f00031e      fpc 00000000
  61     psr 80000101     epsr 80000101     fpsr 00000000
  62 ss0-ss4 bad0beef 00000000 00000000 00000000 00000000      vbr 30005c00
  63   r0-r7 2f0fff4c 00000090 00000001 00000002 00000003 00000004 00000005 00000006
  64  r8-r15 2f0fff64 00000000 00000000 00000000 00000000 00000000 00000000 2f00031e
  65 */
  66
  67 static int
  68 picobug_dumpregs (struct regcache *regcache)
  69 {
  70   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  71   char buf[1024];
  72   int resp_len;
  73   char *p;
  74
  75   /* Send the dump register command to the monitor and
  76      get the reply.  */
  77   monitor_printf (picobug_cmds.dump_registers);
  78   resp_len = monitor_expect_prompt (buf, sizeof (buf));
  79
  80   p = strtok (buf, " \t\r\n");
  81   while (p)
  82     {
  83       if (strchr (p, '-'))
  84         {
  85           /* Got a range.  Either r0-r7, r8-r15 or ss0-ss4.  */
  86           if (startswith (p, "r0") || startswith (p, "r8"))
  87             {
  88               int rn = (p[1] == '0' ? 0 : 8);
  89               int i = 0;
  90
  91               /* Get the next 8 values and record them.  */
  92               while (i < 8)
  93                 {
  94                   p = strtok (NULL, " \t\r\n");
  95                   if (p)
  96                     monitor_supply_register (regcache, rn + i, p);
  97                   i++;
  98                 }
  99             }
 100           else if (startswith (p, "ss"))
 101             {
 102               /* Get the next five values, ignoring the first.  */
 103               int rn;
 104               p = strtok (NULL, " \t\r\n");
 105               for (rn = 39; rn < 43; rn++)
 106                 {
 107                   p = strtok (NULL, " \t\r\n");
 108                   if (p)
 109                     monitor_supply_register (regcache, rn, p);
 110                 }
 111             }
 112           else
 113             {
 114               break;
 115             }
 116         }
 117       else
 118         {
 119           /* Simple register type, paired.  */
 120           char *name = p;
 121           int i;
 122
 123           /* Get and record value.  */
 124           p = strtok (NULL, " \t\r\n");
 125           if (p)
 126             {
 127               for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
 128                 {
 129                   if (picobug_regnames[i]
 130                       && strcmp (picobug_regnames[i], name) == 0)
 131                     break;
 132                 }
 133
 134               if (i <= gdbarch_num_regs (gdbarch))
 135                 monitor_supply_register (regcache, i, p);
 136             }
 137         }
 138       p = strtok (NULL, " \t\r\n");
 139     }
 140
 141   return 0;
 142 }
 143
 144 static void
 145 init_picobug_cmds (void)
 146 {
 147   picobug_cmds.flags = MO_GETMEM_NEEDS_RANGE | MO_CLR_BREAK_USES_ADDR
 148                        | MO_PRINT_PROGRAM_OUTPUT;
 149
 150   picobug_cmds.init = picobug_inits;            /* Init strings         */
 151   picobug_cmds.cont = "g\n";                    /* continue command     */
 152   picobug_cmds.step = "s\n";                    /* single step          */
 153   picobug_cmds.set_break = "br %x\n";           /* set a breakpoint     */
 154   picobug_cmds.clr_break = "nobr %x\n";         /* clear a breakpoint   */
 155   picobug_cmds.clr_all_break = "nobr\n";        /* clear all breakpoints */
 156   picobug_cmds.setmem.cmdb = "mm %x %x ;b\n";   /* setmem.cmdb (addr, value) */
 157   picobug_cmds.setmem.cmdw = "mm %x %x ;h\n";   /* setmem.cmdw (addr, value) */
 158   picobug_cmds.setmem.cmdl = "mm %x %x ;w\n";   /* setmem.cmdl (addr, value) */
 159   picobug_cmds.getmem.cmdb = "md %x %x\n";      /* getmem.cmdb (start addr,
 160                                                    end addr)            */
 161   picobug_cmds.getmem.resp_delim = ":";         /* getmem.resp_delim    */
 162   picobug_cmds.setreg.cmd = "rm %s %x\n";       /* setreg.cmd (name, value) */
 163   picobug_cmds.getreg.cmd = "rd %s\n";          /* getreg.cmd (name)    */
 164   picobug_cmds.getreg.resp_delim = ":";         /* getreg.resp_delim    */
 165   picobug_cmds.dump_registers = "rd\n";         /* dump_registers       */
 166   picobug_cmds.dumpregs = picobug_dumpregs;     /* dump registers parser */
 167   picobug_cmds.load = "lo\n";                   /* download command     */
 168   picobug_cmds.prompt = "picobug> ";            /* monitor command prompt */
 169   picobug_cmds.line_term = "\n";                /* end-of-line terminator */
 170   picobug_cmds.target = &picobug_ops;           /* target operations    */
 171   picobug_cmds.stopbits = SERIAL_1_STOPBITS;    /* number of stop bits  */
 172   picobug_cmds.regnames = picobug_regnames;     /* registers names      */
 173   picobug_cmds.num_breakpoints = 20;            /* number of breakpoints */
 174   picobug_cmds.magic = MONITOR_OPS_MAGIC;       /* magic                */
 175 }
 176
 177 void
 178 _initialize_picobug_rom (void)
 179 {
 180   int i;
 181
 182   /* Initialize m32r RevC monitor target.  */
 183   init_picobug_cmds ();
 184   init_monitor_ops (&picobug_ops);
 185   picobug_ops.to_shortname = "picobug";
 186   picobug_ops.to_longname = "picobug monitor";
 187   picobug_ops.to_doc = "Debug via the picobug monitor.\n\
 188 Specify the serial device it is connected to (e.g. /dev/ttya).";
 189   picobug_ops.to_open = picobug_open;
 190
 191   add_target (&picobug_ops);
 192 }