gdb/cpu32bug-rom.c

   1 /* Remote debugging interface for CPU32Bug Rom monitor for GDB, the GNU debugger.
   2    Copyright 1995 Free Software Foundation, Inc.
   3
   4    Written by Stu Grossman 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 #include "defs.h"
  23 #include "gdbcore.h"
  24 #include "target.h"
  25 #include "monitor.h"
  26 #include "serial.h"
  27
  28 static void cpu32bug_open PARAMS ((char *args, int from_tty));
  29
  30 static void
  31 cpu32bug_supply_register (regname, regnamelen, val, vallen)
  32      char *regname;
  33      int regnamelen;
  34      char *val;
  35      int vallen;
  36 {
  37   int regno;
  38
  39   if (regnamelen != 2)
  40     return;
  41
  42   switch (regname[0])
  43     {
  44     case 'S':
  45       if (regname[1] != 'R')
  46         return;
  47       regno = PS_REGNUM;
  48       break;
  49     case 'P':
  50       if (regname[1] != 'C')
  51         return;
  52       regno = PC_REGNUM;
  53       break;
  54     case 'D':
  55       if (regname[1] < '0' || regname[1] > '7')
  56         return;
  57       regno = regname[1] - '0' + D0_REGNUM;
  58       break;
  59     case 'A':
  60       if (regname[1] < '0' || regname[1] > '7')
  61         return;
  62       regno = regname[1] - '0' + A0_REGNUM;
  63       break;
  64     default:
  65       return;
  66     }
  67
  68   monitor_supply_register (regno, val);
  69 }
  70
  71 /*
  72  * This array of registers needs to match the indexes used by GDB. The
  73  * whole reason this exists is because the various ROM monitors use
  74  * different names than GDB does, and don't support all the
  75  * registers either. So, typing "info reg sp" becomes an "A7".
  76  */
  77
  78 static char *cpu32bug_regnames[NUM_REGS] =
  79 {
  80   "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
  81   "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
  82   "SR", "PC",
  83 };
  84
  85 /*
  86  * Define the monitor command strings. Since these are passed directly
  87  * through to a printf style function, we need can include formatting
  88  * strings. We also need a CR or LF on the end.
  89  */
  90
  91 static struct target_ops cpu32bug_ops;
  92
  93 static char *cpu32bug_loadtypes[] = {"srec", NULL};
  94 static char *cpu32bug_loadprotos[] = {"none", NULL};
  95
  96 static char *cpu32bug_inits[] = {"\r", NULL};
  97
  98 static struct monitor_ops cpu32bug_cmds =
  99 {
 100   MO_CLR_BREAK_USES_ADDR,
 101   cpu32bug_inits,               /* Init strings */
 102   "g\r",                        /* continue command */
 103   "t\r",                        /* single step */
 104   NULL,                         /* interrupt command */
 105   "br %x\r",                    /* set a breakpoint */
 106   "nobr %x\r",                  /* clear a breakpoint */
 107   "nobr\r",                     /* clear all breakpoints */
 108   "bf %x:%x %x;b\r",            /* fill (start count val) */
 109   {
 110     "ms %x %02x\r",             /* setmem.cmdb (addr, value) */
 111     "ms %x %04x\r",             /* setmem.cmdw (addr, value) */
 112     "ms %x %08x\r",             /* setmem.cmdl (addr, value) */
 113     NULL,                       /* setmem.cmdll (addr, value) */
 114     NULL,                       /* setreg.resp_delim */
 115     NULL,                       /* setreg.term */
 116     NULL,                       /* setreg.term_cmd */
 117   },
 118   {
 119     "md %x:%x;b\r",             /* getmem.cmdb (addr, len) */
 120     "md %x:%x;b\r",             /* getmem.cmdw (addr, len) */
 121     "md %x:%x;b\r",             /* getmem.cmdl (addr, len) */
 122     NULL,                       /* getmem.cmdll (addr, len) */
 123     " ",                        /* getmem.resp_delim */
 124     NULL,                       /* getmem.term */
 125     NULL,                       /* getmem.term_cmd */
 126   },
 127   {
 128     "rs %s %x\r",               /* setreg.cmd (name, value) */
 129     NULL,                       /* setreg.resp_delim */
 130     NULL,                       /* setreg.term */
 131     NULL                        /* setreg.term_cmd */
 132   },
 133   {
 134     "rs %s\r",                  /* getreg.cmd (name) */
 135     "=",                        /* getreg.resp_delim */
 136     NULL,                       /* getreg.term */
 137     NULL                        /* getreg.term_cmd */
 138   },
 139   "rd\r",                       /* dump_registers */
 140   "\\(\\w+\\) +=\\([0-9a-fA-F]+\\b\\)", /* register_pattern */
 141   cpu32bug_supply_register,     /* supply_register */
 142   NULL,                         /* load_routine (defaults to SRECs) */
 143   "lo\r",                       /* download command */
 144   "lo\r\n",                     /* load response */
 145   "CPU32Bug>",                  /* monitor command prompt */
 146   NULL,                         /* end-of-command delimitor */
 147   NULL,                         /* optional command terminator */
 148   &cpu32bug_ops,                /* target operations */
 149   cpu32bug_loadtypes,           /* loadtypes */
 150   cpu32bug_loadprotos,          /* loadprotos */
 151   "9600",                       /* supported baud rates */
 152   SERIAL_1_STOPBITS,            /* number of stop bits */
 153   cpu32bug_regnames,            /* registers names */
 154   MONITOR_OPS_MAGIC             /* magic */
 155   };
 156
 157 void
 158 cpu32bug_open(args, from_tty)
 159      char *args;
 160      int from_tty;
 161 {
 162   monitor_open (args, &cpu32bug_cmds, from_tty);
 163 }
 164
 165 void
 166 _initialize_cpu32bug_rom ()
 167 {
 168   init_monitor_ops (&cpu32bug_ops);
 169
 170   cpu32bug_ops.to_shortname = "cpu32bug";
 171   cpu32bug_ops.to_longname = "CPU32Bug monitor";
 172   cpu32bug_ops.to_doc = "Debug via the CPU32Bug monitor.\n\
 173 Specify the serial device it is connected to (e.g. /dev/ttya).";
 174   cpu32bug_ops.to_open = cpu32bug_open;
 175
 176   add_target (&cpu32bug_ops);
 177 }