gdb/dbug-rom.c

   1 /* Remote debugging interface to dBUG ROM monitor for GDB, the GNU debugger.
   2    Copyright 1996, 1999 Free Software Foundation, Inc.
   3
   4    Written by Stan Shebs of Cygnus Support.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 /* dBUG is a monitor supplied on various Motorola boards, including
  24    m68k, ColdFire, and PowerPC-based designs.  The code here assumes
  25    the ColdFire, and (as of 9/25/96) has only been tested with a
  26    ColdFire IDP board.  */
  27
  28 #include "defs.h"
  29 #include "gdbcore.h"
  30 #include "target.h"
  31 #include "monitor.h"
  32 #include "serial.h"
  33
  34 static void dbug_open PARAMS ((char *args, int from_tty));
  35
  36 static void
  37 dbug_supply_register (regname, regnamelen, val, vallen)
  38      char *regname;
  39      int regnamelen;
  40      char *val;
  41      int vallen;
  42 {
  43   int regno;
  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 = PS_REGNUM;
  54       break;
  55     case 'P':
  56       if (regname[1] != 'C')
  57         return;
  58       regno = PC_REGNUM;
  59       break;
  60     case 'D':
  61       if (regname[1] < '0' || regname[1] > '7')
  62         return;
  63       regno = regname[1] - '0' + D0_REGNUM;
  64       break;
  65     case 'A':
  66       if (regname[1] < '0' || regname[1] > '7')
  67         return;
  68       regno = regname[1] - '0' + A0_REGNUM;
  69       break;
  70     default:
  71       return;
  72     }
  73
  74   monitor_supply_register (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 char *dbug_regnames[NUM_REGS] =
  83 {
  84   "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
  85   "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
  86   "SR", "PC"
  87   /* no float registers */
  88 };
  89 static struct target_ops dbug_ops;
  90 static struct monitor_ops dbug_cmds;
  91
  92 static char *dbug_inits[] =
  93 {"\r", NULL};
  94
  95
  96 static void
  97 init_dbug_cmds (void)
  98 {
  99   dbug_cmds.flags = MO_CLR_BREAK_USES_ADDR | MO_GETMEM_NEEDS_RANGE | MO_FILL_USES_ADDR;
 100   dbug_cmds.init = dbug_inits;  /* Init strings */
 101   dbug_cmds.cont = "go\r";      /* continue command */
 102   dbug_cmds.step = "trace\r";   /* single step */
 103   dbug_cmds.stop = NULL;        /* interrupt command */
 104   dbug_cmds.set_break = "br %x\r";      /* set a breakpoint */
 105   dbug_cmds.clr_break = "br -r %x\r";   /* clear a breakpoint */
 106   dbug_cmds.clr_all_break = "br -r\r";  /* clear all breakpoints */
 107   dbug_cmds.fill = "bf.b %x %x %x\r";   /* fill (start end val) */
 108   dbug_cmds.setmem.cmdb = "mm.b %x %x\r";       /* setmem.cmdb (addr, value) */
 109   dbug_cmds.setmem.cmdw = "mm.w %x %x\r";       /* setmem.cmdw (addr, value) */
 110   dbug_cmds.setmem.cmdl = "mm.l %x %x\r";       /* setmem.cmdl (addr, value) */
 111   dbug_cmds.setmem.cmdll = NULL;        /* setmem.cmdll (addr, value) */
 112   dbug_cmds.setmem.resp_delim = NULL;   /* setmem.resp_delim */
 113   dbug_cmds.setmem.term = NULL; /* setmem.term */
 114   dbug_cmds.setmem.term_cmd = NULL;     /* setmem.term_cmd */
 115   dbug_cmds.getmem.cmdb = "md.b %x %x\r";       /* getmem.cmdb (addr, addr2) */
 116   dbug_cmds.getmem.cmdw = "md.w %x %x\r";       /* getmem.cmdw (addr, addr2) */
 117   dbug_cmds.getmem.cmdl = "md.l %x %x\r";       /* getmem.cmdl (addr, addr2) */
 118   dbug_cmds.getmem.cmdll = NULL;        /* getmem.cmdll (addr, addr2) */
 119   dbug_cmds.getmem.resp_delim = ":";    /* getmem.resp_delim */
 120   dbug_cmds.getmem.term = NULL; /* getmem.term */
 121   dbug_cmds.getmem.term_cmd = NULL;     /* getmem.term_cmd */
 122   dbug_cmds.setreg.cmd = "rm %s %x\r";  /* setreg.cmd (name, value) */
 123   dbug_cmds.setreg.resp_delim = NULL;   /* setreg.resp_delim */
 124   dbug_cmds.setreg.term = NULL; /* setreg.term */
 125   dbug_cmds.setreg.term_cmd = NULL;     /* setreg.term_cmd */
 126   dbug_cmds.getreg.cmd = "rd %s\r";     /* getreg.cmd (name) */
 127   dbug_cmds.getreg.resp_delim = ":";    /* getreg.resp_delim */
 128   dbug_cmds.getreg.term = NULL; /* getreg.term */
 129   dbug_cmds.getreg.term_cmd = NULL;     /* getreg.term_cmd */
 130   dbug_cmds.dump_registers = "rd\r";    /* dump_registers */
 131   dbug_cmds.register_pattern = "\\(\\w+\\) +:\\([0-9a-fA-F]+\\b\\)";    /* register_pattern */
 132   dbug_cmds.supply_register = dbug_supply_register;     /* supply_register */
 133   dbug_cmds.load_routine = NULL;        /* load_routine (defaults to SRECs) */
 134   dbug_cmds.load = "dl\r";      /* download command */
 135   dbug_cmds.loadresp = "\n";    /* load response */
 136   dbug_cmds.prompt = "dBUG>";   /* monitor command prompt */
 137   dbug_cmds.line_term = "\r";   /* end-of-line terminator */
 138   dbug_cmds.cmd_end = NULL;     /* optional command terminator */
 139   dbug_cmds.target = &dbug_ops; /* target operations */
 140   dbug_cmds.stopbits = SERIAL_1_STOPBITS;       /* number of stop bits */
 141   dbug_cmds.regnames = dbug_regnames;   /* registers names */
 142   dbug_cmds.magic = MONITOR_OPS_MAGIC;  /* magic */
 143 }                               /* init_debug_ops */
 144
 145 static void
 146 dbug_open (args, from_tty)
 147      char *args;
 148      int from_tty;
 149 {
 150   monitor_open (args, &dbug_cmds, from_tty);
 151 }
 152
 153 void
 154 _initialize_dbug_rom ()
 155 {
 156   init_dbug_cmds ();
 157   init_monitor_ops (&dbug_ops);
 158
 159   dbug_ops.to_shortname = "dbug";
 160   dbug_ops.to_longname = "dBUG monitor";
 161   dbug_ops.to_doc = "Debug via the dBUG monitor.\n\
 162 Specify the serial device it is connected to (e.g. /dev/ttya).";
 163   dbug_ops.to_open = dbug_open;
 164
 165   add_target (&dbug_ops);
 166 }