gdb/dbug-rom.c

   1 /* Remote debugging interface to dBUG ROM monitor for GDB, the GNU debugger.
   2    Copyright (C) 1996, 1998, 1999, 2000, 2001, 2007, 2008, 2009, 2010
   3    Free Software Foundation, Inc.
   4
   5    Written by Stan Shebs of Cygnus Support.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 /* dBUG is a monitor supplied on various Motorola boards, including
  23    m68k, ColdFire, and PowerPC-based designs.  The code here assumes
  24    the ColdFire, and (as of 9/25/96) has only been tested with a
  25    ColdFire IDP board.  */
  26
  27 #include "defs.h"
  28 #include "gdbcore.h"
  29 #include "target.h"
  30 #include "monitor.h"
  31 #include "serial.h"
  32 #include "regcache.h"
  33
  34 #include "m68k-tdep.h"
  35
  36 static void dbug_open (char *args, int from_tty);
  37
  38 static void
  39 dbug_supply_register (struct regcache *regcache, char *regname,
  40                       int regnamelen, char *val, int vallen)
  41 {
  42   int regno;
  43   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  44
  45   if (regnamelen != 2)
  46     return;
  47
  48   switch (regname[0])
  49     {
  50     case 'S':
  51       if (regname[1] != 'R')
  52         return;
  53       regno = gdbarch_ps_regnum (gdbarch);
  54       break;
  55     case 'P':
  56       if (regname[1] != 'C')
  57         return;
  58       regno = gdbarch_pc_regnum (gdbarch);
  59       break;
  60     case 'D':
  61       if (regname[1] < '0' || regname[1] > '7')
  62         return;
  63       regno = regname[1] - '0' + M68K_D0_REGNUM;
  64       break;
  65     case 'A':
  66       if (regname[1] < '0' || regname[1] > '7')
  67         return;
  68       regno = regname[1] - '0' + M68K_A0_REGNUM;
  69       break;
  70     default:
  71       return;
  72     }
  73
  74   monitor_supply_register (regcache, regno, val);
  75 }
  76
  77 /* This array of registers needs to match the indexes used by GDB. The
  78    whole reason this exists is because the various ROM monitors use
  79    different names than GDB does, and don't support all the registers
  80    either. So, typing "info reg sp" becomes an "A7". */
  81
  82 static const char *
  83 dbug_regname (int index)
  84 {
  85   static char *regnames[] =
  86   {
  87     "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
  88     "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
  89     "SR", "PC"
  90     /* no float registers */
  91   };
  92
  93   if (index >= ARRAY_SIZE (regnames) || index < 0)
  94     return NULL;
  95   else
  96     return regnames[index];
  97
  98 }
  99
 100 static struct target_ops dbug_ops;
 101 static struct monitor_ops dbug_cmds;
 102
 103 static char *dbug_inits[] =
 104 {"\r", NULL};
 105
 106
 107 static void
 108 init_dbug_cmds (void)
 109 {
 110   dbug_cmds.flags = MO_CLR_BREAK_USES_ADDR | MO_GETMEM_NEEDS_RANGE | MO_FILL_USES_ADDR;
 111   dbug_cmds.init = dbug_inits;  /* Init strings */
 112   dbug_cmds.cont = "go\r";      /* continue command */
 113   dbug_cmds.step = "trace\r";   /* single step */
 114   dbug_cmds.stop = NULL;        /* interrupt command */
 115   dbug_cmds.set_break = "br %x\r";      /* set a breakpoint */
 116   dbug_cmds.clr_break = "br -r %x\r";   /* clear a breakpoint */
 117   dbug_cmds.clr_all_break = "br -r\r";  /* clear all breakpoints */
 118   dbug_cmds.fill = "bf.b %x %x %x\r";   /* fill (start end val) */
 119   dbug_cmds.setmem.cmdb = "mm.b %x %x\r";       /* setmem.cmdb (addr, value) */
 120   dbug_cmds.setmem.cmdw = "mm.w %x %x\r";       /* setmem.cmdw (addr, value) */
 121   dbug_cmds.setmem.cmdl = "mm.l %x %x\r";       /* setmem.cmdl (addr, value) */
 122   dbug_cmds.setmem.cmdll = NULL;        /* setmem.cmdll (addr, value) */
 123   dbug_cmds.setmem.resp_delim = NULL;   /* setmem.resp_delim */
 124   dbug_cmds.setmem.term = NULL; /* setmem.term */
 125   dbug_cmds.setmem.term_cmd = NULL;     /* setmem.term_cmd */
 126   dbug_cmds.getmem.cmdb = "md.b %x %x\r";       /* getmem.cmdb (addr, addr2) */
 127   dbug_cmds.getmem.cmdw = "md.w %x %x\r";       /* getmem.cmdw (addr, addr2) */
 128   dbug_cmds.getmem.cmdl = "md.l %x %x\r";       /* getmem.cmdl (addr, addr2) */
 129   dbug_cmds.getmem.cmdll = NULL;        /* getmem.cmdll (addr, addr2) */
 130   dbug_cmds.getmem.resp_delim = ":";    /* getmem.resp_delim */
 131   dbug_cmds.getmem.term = NULL; /* getmem.term */
 132   dbug_cmds.getmem.term_cmd = NULL;     /* getmem.term_cmd */
 133   dbug_cmds.setreg.cmd = "rm %s %x\r";  /* setreg.cmd (name, value) */
 134   dbug_cmds.setreg.resp_delim = NULL;   /* setreg.resp_delim */
 135   dbug_cmds.setreg.term = NULL; /* setreg.term */
 136   dbug_cmds.setreg.term_cmd = NULL;     /* setreg.term_cmd */
 137   dbug_cmds.getreg.cmd = "rd %s\r";     /* getreg.cmd (name) */
 138   dbug_cmds.getreg.resp_delim = ":";    /* getreg.resp_delim */
 139   dbug_cmds.getreg.term = NULL; /* getreg.term */
 140   dbug_cmds.getreg.term_cmd = NULL;     /* getreg.term_cmd */
 141   dbug_cmds.dump_registers = "rd\r";    /* dump_registers */
 142   dbug_cmds.register_pattern = "\\(\\w+\\) +:\\([0-9a-fA-F]+\\b\\)";    /* register_pattern */
 143   dbug_cmds.supply_register = dbug_supply_register;
 144   dbug_cmds.load_routine = NULL;        /* load_routine (defaults to SRECs) */
 145   dbug_cmds.load = "dl\r";      /* download command */
 146   dbug_cmds.loadresp = "\n";    /* load response */
 147   dbug_cmds.prompt = "dBUG>";   /* monitor command prompt */
 148   dbug_cmds.line_term = "\r";   /* end-of-line terminator */
 149   dbug_cmds.cmd_end = NULL;     /* optional command terminator */
 150   dbug_cmds.target = &dbug_ops; /* target operations */
 151   dbug_cmds.stopbits = SERIAL_1_STOPBITS;       /* number of stop bits */
 152   dbug_cmds.regnames = NULL;    /* registers names */
 153   dbug_cmds.regname = dbug_regname;
 154   dbug_cmds.magic = MONITOR_OPS_MAGIC;  /* magic */
 155 }                               /* init_debug_ops */
 156
 157 static void
 158 dbug_open (char *args, int from_tty)
 159 {
 160   monitor_open (args, &dbug_cmds, from_tty);
 161 }
 162
 163 extern initialize_file_ftype _initialize_dbug_rom; /* -Wmissing-prototypes */
 164
 165 void
 166 _initialize_dbug_rom (void)
 167 {
 168   init_dbug_cmds ();
 169   init_monitor_ops (&dbug_ops);
 170
 171   dbug_ops.to_shortname = "dbug";
 172   dbug_ops.to_longname = "dBUG monitor";
 173   dbug_ops.to_doc = "Debug via the dBUG monitor.\n\
 174 Specify the serial device it is connected to (e.g. /dev/ttya).";
 175   dbug_ops.to_open = dbug_open;
 176
 177   add_target (&dbug_ops);
 178 }