gdb/cpu32bug-rom.c

   1 /* Remote debugging interface for CPU32Bug 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 Stu Grossman 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 static void cpu32bug_open (char *args, int from_tty);
  34
  35 static void
  36 cpu32bug_supply_register (char *regname, int regnamelen, char *val, int vallen)
  37 {
  38   int regno;
  39
  40   if (regnamelen != 2)
  41     return;
  42
  43   switch (regname[0])
  44     {
  45     case 'S':
  46       if (regname[1] != 'R')
  47         return;
  48       regno = PS_REGNUM;
  49       break;
  50     case 'P':
  51       if (regname[1] != 'C')
  52         return;
  53       regno = PC_REGNUM;
  54       break;
  55     case 'D':
  56       if (regname[1] < '0' || regname[1] > '7')
  57         return;
  58       regno = regname[1] - '0' + M68K_D0_REGNUM;
  59       break;
  60     case 'A':
  61       if (regname[1] < '0' || regname[1] > '7')
  62         return;
  63       regno = regname[1] - '0' + M68K_A0_REGNUM;
  64       break;
  65     default:
  66       return;
  67     }
  68
  69   monitor_supply_register (regno, val);
  70 }
  71
  72 /*
  73  * This array of registers needs to match the indexes used by GDB. The
  74  * whole reason this exists is because the various ROM monitors use
  75  * different names than GDB does, and don't support all the
  76  * registers either. So, typing "info reg sp" becomes an "A7".
  77  */
  78
  79 static const char *
  80 cpu32bug_regname (int index)
  81 {
  82   static char *regnames[] =
  83   {
  84     "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
  85     "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
  86     "SR", "PC"
  87   };
  88
  89   if ((index >= (sizeof (regnames) / sizeof (regnames[0])))
  90        || (index < 0) || (index >= NUM_REGS))
  91     return NULL;
  92   else
  93     return regnames[index];
  94 }
  95
  96 /*
  97  * Define the monitor command strings. Since these are passed directly
  98  * through to a printf style function, we need can include formatting
  99  * strings. We also need a CR or LF on the end.
 100  */
 101
 102 static struct target_ops cpu32bug_ops;
 103
 104 static char *cpu32bug_inits[] =
 105 {"\r", NULL};
 106
 107 static struct monitor_ops cpu32bug_cmds;
 108
 109 static void
 110 init_cpu32bug_cmds (void)
 111 {
 112   cpu32bug_cmds.flags = MO_CLR_BREAK_USES_ADDR;
 113   cpu32bug_cmds.init = cpu32bug_inits;  /* Init strings */
 114   cpu32bug_cmds.cont = "g\r";   /* continue command */
 115   cpu32bug_cmds.step = "t\r";   /* single step */
 116   cpu32bug_cmds.stop = NULL;    /* interrupt command */
 117   cpu32bug_cmds.set_break = "br %x\r";  /* set a breakpoint */
 118   cpu32bug_cmds.clr_break = "nobr %x\r";        /* clear a breakpoint */
 119   cpu32bug_cmds.clr_all_break = "nobr\r";       /* clear all breakpoints */
 120   cpu32bug_cmds.fill = "bf %x:%x %x;b\r";       /* fill (start count val) */
 121   cpu32bug_cmds.setmem.cmdb = "ms %x %02x\r";   /* setmem.cmdb (addr, value) */
 122   cpu32bug_cmds.setmem.cmdw = "ms %x %04x\r";   /* setmem.cmdw (addr, value) */
 123   cpu32bug_cmds.setmem.cmdl = "ms %x %08x\r";   /* setmem.cmdl (addr, value) */
 124   cpu32bug_cmds.setmem.cmdll = NULL;    /* setmem.cmdll (addr, value) */
 125   cpu32bug_cmds.setmem.resp_delim = NULL;       /* setreg.resp_delim */
 126   cpu32bug_cmds.setmem.term = NULL;     /* setreg.term */
 127   cpu32bug_cmds.setmem.term_cmd = NULL;         /* setreg.term_cmd */
 128   cpu32bug_cmds.getmem.cmdb = "md %x:%x;b\r";   /* getmem.cmdb (addr, len) */
 129   cpu32bug_cmds.getmem.cmdw = "md %x:%x;b\r";   /* getmem.cmdw (addr, len) */
 130   cpu32bug_cmds.getmem.cmdl = "md %x:%x;b\r";   /* getmem.cmdl (addr, len) */
 131   cpu32bug_cmds.getmem.cmdll = NULL;    /* getmem.cmdll (addr, len) */
 132   cpu32bug_cmds.getmem.resp_delim = " ";        /* getmem.resp_delim */
 133   cpu32bug_cmds.getmem.term = NULL;     /* getmem.term */
 134   cpu32bug_cmds.getmem.term_cmd = NULL;         /* getmem.term_cmd */
 135   cpu32bug_cmds.setreg.cmd = "rs %s %x\r";      /* setreg.cmd (name, value) */
 136   cpu32bug_cmds.setreg.resp_delim = NULL;       /* setreg.resp_delim */
 137   cpu32bug_cmds.setreg.term = NULL;     /* setreg.term */
 138   cpu32bug_cmds.setreg.term_cmd = NULL;         /* setreg.term_cmd */
 139   cpu32bug_cmds.getreg.cmd = "rs %s\r";         /* getreg.cmd (name) */
 140   cpu32bug_cmds.getreg.resp_delim = "=";        /* getreg.resp_delim */
 141   cpu32bug_cmds.getreg.term = NULL;     /* getreg.term */
 142   cpu32bug_cmds.getreg.term_cmd = NULL;         /* getreg.term_cmd */
 143   cpu32bug_cmds.dump_registers = "rd\r";        /* dump_registers */
 144   cpu32bug_cmds.register_pattern = "\\(\\w+\\) +=\\([0-9a-fA-F]+\\b\\)";        /* register_pattern */
 145   cpu32bug_cmds.supply_register = cpu32bug_supply_register;
 146   cpu32bug_cmds.load_routine = NULL;    /* load_routine (defaults to SRECs) */
 147   cpu32bug_cmds.load = "lo\r";  /* download command */
 148   cpu32bug_cmds.loadresp = "\n";        /* load response */
 149   cpu32bug_cmds.prompt = "CPU32Bug>";   /* monitor command prompt */
 150   cpu32bug_cmds.line_term = "\r";       /* end-of-line terminator */
 151   cpu32bug_cmds.cmd_end = NULL; /* optional command terminator */
 152   cpu32bug_cmds.target = &cpu32bug_ops;         /* target operations */
 153   cpu32bug_cmds.stopbits = SERIAL_1_STOPBITS;   /* number of stop bits */
 154   cpu32bug_cmds.regnames = NULL;        /* registers names */
 155   cpu32bug_cmds.regname = cpu32bug_regname;
 156   cpu32bug_cmds.magic = MONITOR_OPS_MAGIC;      /* magic */
 157 };                              /* init_cpu32bug_cmds */
 158
 159 static void
 160 cpu32bug_open (char *args, int from_tty)
 161 {
 162   monitor_open (args, &cpu32bug_cmds, from_tty);
 163 }
 164
 165 extern initialize_file_ftype _initialize_cpu32bug_rom; /* -Wmissing-prototypes */
 166
 167 void
 168 _initialize_cpu32bug_rom (void)
 169 {
 170   init_cpu32bug_cmds ();
 171   init_monitor_ops (&cpu32bug_ops);
 172
 173   cpu32bug_ops.to_shortname = "cpu32bug";
 174   cpu32bug_ops.to_longname = "CPU32Bug monitor";
 175   cpu32bug_ops.to_doc = "Debug via the CPU32Bug monitor.\n\
 176 Specify the serial device it is connected to (e.g. /dev/ttya).";
 177   cpu32bug_ops.to_open = cpu32bug_open;
 178
 179   add_target (&cpu32bug_ops);
 180 }