gdb/ppcbug-rom.c

   1 /* Remote debugging interface for PPCbug (PowerPC) Rom monitor
   2    for GDB, the GNU debugger.
   3    Copyright (C) 1995-2013 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 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 #include "defs.h"
  23 #include "gdbcore.h"
  24 #include "target.h"
  25 #include "monitor.h"
  26 #include "serial.h"
  27 #include "regcache.h"
  28
  29 static void
  30 ppcbug_supply_register (struct regcache *regcache, char *regname,
  31                         int regnamelen, char *val, int vallen)
  32 {
  33   int regno = 0;
  34
  35   if (regnamelen < 2 || regnamelen > 4)
  36     return;
  37
  38   switch (regname[0])
  39     {
  40     case 'R':
  41       if (regname[1] < '0' || regname[1] > '9')
  42         return;
  43       if (regnamelen == 2)
  44         regno = regname[1] - '0';
  45       else if (regnamelen == 3 && regname[2] >= '0' && regname[2] <= '9')
  46         regno = (regname[1] - '0') * 10 + (regname[2] - '0');
  47       else
  48         return;
  49       break;
  50     case 'F':
  51       if (regname[1] != 'R' || regname[2] < '0' || regname[2] > '9')
  52         return;
  53       if (regnamelen == 3)
  54         regno = 32 + regname[2] - '0';
  55       else if (regnamelen == 4 && regname[3] >= '0' && regname[3] <= '9')
  56         regno = 32 + (regname[2] - '0') * 10 + (regname[3] - '0');
  57       else
  58         return;
  59       break;
  60     case 'I':
  61       if (regnamelen != 2 || regname[1] != 'P')
  62         return;
  63       regno = 64;
  64       break;
  65     case 'M':
  66       if (regnamelen != 3 || regname[1] != 'S' || regname[2] != 'R')
  67         return;
  68       regno = 65;
  69       break;
  70     case 'C':
  71       if (regnamelen != 2 || regname[1] != 'R')
  72         return;
  73       regno = 66;
  74       break;
  75     case 'S':
  76       if (regnamelen != 4 || regname[1] != 'P' || regname[2] != 'R')
  77         return;
  78       else if (regname[3] == '8')
  79         regno = 67;
  80       else if (regname[3] == '9')
  81         regno = 68;
  82       else if (regname[3] == '1')
  83         regno = 69;
  84       else if (regname[3] == '0')
  85         regno = 70;
  86       else
  87         return;
  88       break;
  89     default:
  90       return;
  91     }
  92
  93   monitor_supply_register (regcache, regno, val);
  94 }
  95
  96 /*
  97  * This array of registers needs to match the indexes used by GDB.  The
  98  * whole reason this exists is because the various ROM monitors use
  99  * different names than GDB does, and don't support all the
 100  * registers either.  So, typing "info reg sp" becomes an "A7".
 101  */
 102
 103 static char *ppcbug_regnames[] =
 104 {
 105   "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
 106   "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
 107   "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
 108   "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
 109
 110   "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7",
 111   "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15",
 112   "fr16", "fr17", "fr18", "fr19", "fr20", "fr21", "fr22", "fr23",
 113   "fr24", "fr25", "fr26", "fr27", "fr28", "fr29", "fr30", "fr31",
 114
 115 /* pc      ps      cnd     lr      cnt     xer     mq */
 116   "ip", "msr", "cr", "spr8", "spr9", "spr1", "spr0"
 117 };
 118
 119 /*
 120  * Define the monitor command strings.  Since these are passed directly
 121  * through to a printf style function, we need can include formatting
 122  * strings.  We also need a CR or LF on the end.
 123  */
 124
 125 static struct target_ops ppcbug_ops0;
 126 static struct target_ops ppcbug_ops1;
 127
 128 static char *ppcbug_inits[] =
 129 {"\r", NULL};
 130
 131 static void
 132 init_ppc_cmds (char *LOAD_CMD,
 133                struct monitor_ops *OPS,
 134                struct target_ops *targops)
 135 {
 136   OPS->flags = MO_CLR_BREAK_USES_ADDR | MO_HANDLE_NL;
 137   OPS->init = ppcbug_inits;     /* Init strings */
 138   OPS->cont = "g\r";            /* continue command */
 139   OPS->step = "t\r";            /* single step */
 140   OPS->stop = NULL;             /* interrupt command */
 141   OPS->set_break = "br %x\r";   /* set a breakpoint */
 142   OPS->clr_break = "nobr %x\r"; /* clear a breakpoint */
 143   OPS->clr_all_break = "nobr\r";        /* clear all breakpoints */
 144   OPS->fill = "bf %x:%x %x;b\r";        /* fill (start count val) */
 145   OPS->setmem.cmdb = "ms %x %02x\r";    /* setmem.cmdb (addr, value) */
 146   OPS->setmem.cmdw = "ms %x %04x\r";    /* setmem.cmdw (addr, value) */
 147   OPS->setmem.cmdl = "ms %x %08x\r";    /* setmem.cmdl (addr, value) */
 148   OPS->setmem.cmdll = NULL;     /* setmem.cmdll (addr, value) */
 149   OPS->setmem.resp_delim = NULL;        /* setreg.resp_delim */
 150   OPS->setmem.term = NULL;      /* setreg.term */
 151   OPS->setmem.term_cmd = NULL;  /* setreg.term_cmd */
 152   OPS->getmem.cmdb = "md %x:%x;b\r";    /* getmem.cmdb (addr, len) */
 153   OPS->getmem.cmdw = "md %x:%x;b\r";    /* getmem.cmdw (addr, len) */
 154   OPS->getmem.cmdl = "md %x:%x;b\r";    /* getmem.cmdl (addr, len) */
 155   OPS->getmem.cmdll = NULL;     /* getmem.cmdll (addr, len) */
 156   OPS->getmem.resp_delim = " "; /* getmem.resp_delim */
 157   OPS->getmem.term = NULL;      /* getmem.term */
 158   OPS->getmem.term_cmd = NULL;  /* getmem.term_cmd */
 159   OPS->setreg.cmd = "rs %s %x\r";       /* setreg.cmd (name, value) */
 160   OPS->setreg.resp_delim = NULL;        /* setreg.resp_delim */
 161   OPS->setreg.term = NULL;      /* setreg.term */
 162   OPS->setreg.term_cmd = NULL;  /* setreg.term_cmd */
 163   OPS->getreg.cmd = "rs %s\r";  /* getreg.cmd (name) */
 164   OPS->getreg.resp_delim = "="; /* getreg.resp_delim */
 165   OPS->getreg.term = NULL;      /* getreg.term */
 166   OPS->getreg.term_cmd = NULL;  /* getreg.term_cmd */
 167                                 /* register_pattern */
 168   OPS->register_pattern = "\\(\\w+\\) +=\\([0-9a-fA-F]+\\b\\)";
 169   OPS->supply_register = ppcbug_supply_register;
 170   OPS->dump_registers = "rd\r"; /* dump all registers */
 171   OPS->load_routine = NULL;     /* load_routine (defaults to SRECs) */
 172   OPS->load = LOAD_CMD;         /* download command */
 173   OPS->loadresp = NULL;         /* load response */
 174   OPS->prompt = "PPC1-Bug>";    /* monitor command prompt */
 175   OPS->line_term = "\r";        /* end-of-line terminator */
 176   OPS->cmd_end = NULL;          /* optional command terminator */
 177   OPS->target = targops;        /* target operations */
 178   OPS->stopbits = SERIAL_1_STOPBITS;    /* number of stop bits */
 179   OPS->regnames = ppcbug_regnames;      /* registers names */
 180   OPS->magic = MONITOR_OPS_MAGIC;       /* magic */
 181 }
 182
 183
 184 static struct monitor_ops ppcbug_cmds0;
 185 static struct monitor_ops ppcbug_cmds1;
 186
 187 static void
 188 ppcbug_open0 (char *args, int from_tty)
 189 {
 190   monitor_open (args, &ppcbug_cmds0, from_tty);
 191 }
 192
 193 static void
 194 ppcbug_open1 (char *args, int from_tty)
 195 {
 196   monitor_open (args, &ppcbug_cmds1, from_tty);
 197 }
 198
 199 extern initialize_file_ftype _initialize_ppcbug_rom; /* -Wmissing-prototypes */
 200
 201 void
 202 _initialize_ppcbug_rom (void)
 203 {
 204   init_ppc_cmds ("lo 0\r", &ppcbug_cmds0, &ppcbug_ops0);
 205   init_ppc_cmds ("lo 1\r", &ppcbug_cmds1, &ppcbug_ops1);
 206   init_monitor_ops (&ppcbug_ops0);
 207
 208   ppcbug_ops0.to_shortname = "ppcbug";
 209   ppcbug_ops0.to_longname = "PowerPC PPCBug monitor on port 0";
 210   ppcbug_ops0.to_doc = "Debug via the PowerPC PPCBug monitor using port 0.\n\
 211 Specify the serial device it is connected to (e.g. /dev/ttya).";
 212   ppcbug_ops0.to_open = ppcbug_open0;
 213
 214   add_target (&ppcbug_ops0);
 215
 216   init_monitor_ops (&ppcbug_ops1);
 217
 218   ppcbug_ops1.to_shortname = "ppcbug1";
 219   ppcbug_ops1.to_longname = "PowerPC PPCBug monitor on port 1";
 220   ppcbug_ops1.to_doc = "Debug via the PowerPC PPCBug monitor using port 1.\n\
 221 Specify the serial device it is connected to (e.g. /dev/ttya).";
 222   ppcbug_ops1.to_open = ppcbug_open1;
 223
 224   add_target (&ppcbug_ops1);
 225 }