gdb/abug-rom.c

   1 /* Remote debugging interface for ABug Rom monitor for GDB, the GNU debugger.
   2    Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001
   3    Free Software Foundation, Inc.
   4
   5    Written by Rob Savoye 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 2 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, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22    Boston, MA 02110-1301, USA.  */
  23
  24 #include "defs.h"
  25 #include "gdbcore.h"
  26 #include "target.h"
  27 #include "monitor.h"
  28 #include "serial.h"
  29 #include "regcache.h"
  30
  31 #include "m68k-tdep.h"
  32
  33 /* Prototypes for local functions. */
  34
  35 static void abug_open (char *args, int from_tty);
  36
  37 static void
  38 abug_supply_register (char *regname, int regnamelen, char *val, int vallen)
  39 {
  40   int regno;
  41
  42   if (regnamelen != 2)
  43     return;
  44
  45   switch (regname[0])
  46     {
  47     case 'S':
  48       if (regname[1] != 'R')
  49         return;
  50       regno = PS_REGNUM;
  51       break;
  52     case 'P':
  53       if (regname[1] != 'C')
  54         return;
  55       regno = PC_REGNUM;
  56       break;
  57     case 'D':
  58       if (regname[1] < '0' || regname[1] > '7')
  59         return;
  60       regno = regname[1] - '0' + M68K_D0_REGNUM;
  61       break;
  62     case 'A':
  63       if (regname[1] < '0' || regname[1] > '7')
  64         return;
  65       regno = regname[1] - '0' + M68K_A0_REGNUM;
  66       break;
  67     default:
  68       return;
  69     }
  70
  71   monitor_supply_register (regno, val);
  72 }
  73
  74 /*
  75  * This array of registers needs to match the indexes used by GDB. The
  76  * whole reason this exists is because the various ROM monitors use
  77  * different names than GDB does, and don't support all the
  78  * registers either. So, typing "info reg sp" becomes an "A7".
  79  */
  80
  81 static const char *
  82 abug_regname (int index)
  83 {
  84   static char *regnames[] =
  85   {
  86     "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
  87     "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
  88     "PC",
  89   };
  90
  91   if ((index >= (sizeof (regnames) / sizeof (regnames[0])))
  92        || (index < 0) || (index >= NUM_REGS))
  93     return NULL;
  94   else
  95     return regnames[index];
  96 }
  97
  98 /*
  99  * Define the monitor command strings. Since these are passed directly
 100  * through to a printf style function, we need can include formatting
 101  * strings. We also need a CR or LF on the end.
 102  */
 103
 104 static struct target_ops abug_ops;
 105
 106 static char *abug_inits[] =
 107 {"\r", NULL};
 108
 109 static struct monitor_ops abug_cmds;
 110
 111 static void
 112 init_abug_cmds (void)
 113 {
 114   abug_cmds.flags = MO_CLR_BREAK_USES_ADDR;
 115   abug_cmds.init = abug_inits;  /* Init strings */
 116   abug_cmds.cont = "g\r";       /* continue command */
 117   abug_cmds.step = "t\r";       /* single step */
 118   abug_cmds.stop = NULL;        /* interrupt command */
 119   abug_cmds.set_break = "br %x\r";      /* set a breakpoint */
 120   abug_cmds.clr_break = "nobr %x\r";    /* clear a breakpoint */
 121   abug_cmds.clr_all_break = "nobr\r";   /* clear all breakpoints */
 122   abug_cmds.fill = "bf %x:%x %x;b\r";   /* fill (start count val) */
 123   abug_cmds.setmem.cmdb = "ms %x %02x\r";       /* setmem.cmdb (addr, value) */
 124   abug_cmds.setmem.cmdw = "ms %x %04x\r";       /* setmem.cmdw (addr, value) */
 125   abug_cmds.setmem.cmdl = "ms %x %08x\r";       /* setmem.cmdl (addr, value) */
 126   abug_cmds.setmem.cmdll = NULL;        /* setmem.cmdll (addr, value) */
 127   abug_cmds.setmem.resp_delim = NULL;   /* setreg.resp_delim */
 128   abug_cmds.setmem.term = NULL; /* setreg.term */
 129   abug_cmds.setmem.term_cmd = NULL;     /* setreg.term_cmd */
 130   abug_cmds.getmem.cmdb = "md %x:%x;b\r";       /* getmem.cmdb (addr, len) */
 131   abug_cmds.getmem.cmdw = "md %x:%x;b\r";       /* getmem.cmdw (addr, len) */
 132   abug_cmds.getmem.cmdl = "md %x:%x;b\r";       /* getmem.cmdl (addr, len) */
 133   abug_cmds.getmem.cmdll = NULL;        /* getmem.cmdll (addr, len) */
 134   abug_cmds.getmem.resp_delim = " ";    /* getmem.resp_delim */
 135   abug_cmds.getmem.term = NULL; /* getmem.term */
 136   abug_cmds.getmem.term_cmd = NULL;     /* getmem.term_cmd */
 137   abug_cmds.setreg.cmd = "rm %s %x\r";  /* setreg.cmd (name, value) */
 138   abug_cmds.setreg.resp_delim = "=";    /* setreg.resp_delim */
 139   abug_cmds.setreg.term = "? "; /* setreg.term */
 140   abug_cmds.setreg.term_cmd = ".\r";    /* setreg.term_cmd */
 141   abug_cmds.getreg.cmd = "rm %s\r";     /* getreg.cmd (name) */
 142   abug_cmds.getreg.resp_delim = "=";    /* getreg.resp_delim */
 143   abug_cmds.getreg.term = "? "; /* getreg.term */
 144   abug_cmds.getreg.term_cmd = ".\r";    /* getreg.term_cmd */
 145   abug_cmds.dump_registers = "rd\r";    /* dump_registers */
 146   abug_cmds.register_pattern = "\\(\\w+\\) +=\\([0-9a-fA-F]+\\b\\)";    /* register_pattern */
 147   abug_cmds.supply_register = abug_supply_register;
 148   abug_cmds.load_routine = NULL;        /* load_routine (defaults to SRECs) */
 149   abug_cmds.load = "lo 0\r";    /* download command */
 150   abug_cmds.loadresp = "\n";    /* load response */
 151   abug_cmds.prompt = "135Bug>"; /* monitor command prompt */
 152   abug_cmds.line_term = "\r";   /* end-of-line terminator */
 153   abug_cmds.cmd_end = NULL;     /* optional command terminator */
 154   abug_cmds.target = &abug_ops; /* target operations */
 155   abug_cmds.stopbits = SERIAL_1_STOPBITS;       /* number of stop bits */
 156   abug_cmds.regnames = NULL;    /* registers names */
 157   abug_cmds.regname = abug_regname;
 158   abug_cmds.magic = MONITOR_OPS_MAGIC;  /* magic */
 159 };
 160
 161 static void
 162 abug_open (char *args, int from_tty)
 163 {
 164   monitor_open (args, &abug_cmds, from_tty);
 165 }
 166
 167 extern initialize_file_ftype _initialize_abug_rom; /* -Wmissing-prototypes */
 168
 169 void
 170 _initialize_abug_rom (void)
 171 {
 172   init_abug_cmds ();
 173   init_monitor_ops (&abug_ops);
 174
 175   abug_ops.to_shortname = "abug";
 176   abug_ops.to_longname = _("ABug monitor");
 177   abug_ops.to_doc = _("Debug via the ABug monitor.\n\
 178 Specify the serial device it is connected to (e.g. /dev/ttya).");
 179   abug_ops.to_open = abug_open;
 180
 181   add_target (&abug_ops);
 182 }