gdb/mon960-rom.c

   1 /* Remote target glue for the Intel 960 MON960 ROM monitor.
   2    Copyright 1995, 1996 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20
  21 #include "defs.h"
  22 #include "gdbcore.h"
  23 #include "target.h"
  24 #include "monitor.h"
  25 #include "serial.h"
  26 #include "srec.h"
  27 #include "xmodem.h"
  28 #include "symtab.h"
  29 #include "symfile.h" /* for generic_load */
  30
  31 #if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY)
  32 #define HAVE_SGTTY
  33 #endif
  34
  35 #ifdef HAVE_SGTTY
  36 #include <sys/ioctl.h>
  37 #endif
  38
  39 #include <sys/types.h>  /* Needed by file.h on Sys V */
  40 #include <sys/file.h>
  41 #include <signal.h>
  42 #include <sys/stat.h>
  43
  44 #define USE_GENERIC_LOAD
  45
  46 static struct target_ops mon960_ops;
  47
  48 static void mon960_open PARAMS ((char *args, int from_tty));
  49
  50 #ifdef USE_GENERIC_LOAD
  51
  52 static void
  53 mon960_load_gen (filename, from_tty)
  54     char *filename;
  55     int from_tty;
  56 {
  57   extern int inferior_pid;
  58
  59   generic_load (filename, from_tty);
  60   /* Finally, make the PC point at the start address */
  61   if (exec_bfd)
  62     write_pc (bfd_get_start_address (exec_bfd));
  63
  64   inferior_pid = 0;             /* No process now */
  65 }
  66
  67 #else
  68
  69 static void
  70 mon960_load (desc, file, hashmark)
  71      serial_t desc;
  72      char *file;
  73      int hashmark;
  74 {
  75   bfd *abfd;
  76   asection *s;
  77   char *buffer;
  78   int i;
  79
  80   buffer = alloca (XMODEM_PACKETSIZE);
  81   abfd = bfd_openr (file, 0);
  82   if (!abfd)
  83     {
  84       printf_filtered ("Unable to open file %s\n", file);
  85       return;
  86     }
  87   if (bfd_check_format (abfd, bfd_object) == 0)
  88     {
  89       printf_filtered ("File is not an object file\n");
  90       return;
  91     }
  92   for (s = abfd->sections; s; s = s->next)
  93     if (s->flags & SEC_LOAD)
  94       {
  95         bfd_size_type section_size;
  96         printf_filtered ("%s\t: 0x%4x .. 0x%4x  ", s->name, s->vma,
  97                          s->vma + s->_raw_size);
  98         gdb_flush (gdb_stdout);
  99         monitor_printf (current_monitor->load, s->vma);
 100         if (current_monitor->loadresp)
 101           monitor_expect (current_monitor->loadresp, NULL, 0);
 102         xmodem_init_xfer (desc);
 103         section_size = bfd_section_size (abfd, s);
 104         for (i = 0; i < section_size; i += XMODEM_DATASIZE)
 105           {
 106             int numbytes;
 107             numbytes = min (XMODEM_DATASIZE, section_size - i);
 108             bfd_get_section_contents (abfd, s, buffer + XMODEM_DATAOFFSET, i,
 109                                       numbytes);
 110             xmodem_send_packet (desc, buffer, numbytes, hashmark);
 111             if (hashmark)
 112               {
 113                 putchar_unfiltered ('#');
 114                 gdb_flush (gdb_stdout);
 115               }
 116           }                     /* Per-packet (or S-record) loop */
 117         xmodem_finish_xfer (desc);
 118         monitor_expect_prompt (NULL, 0);
 119         putchar_unfiltered ('\n');
 120       }                         /* Loadable sections */
 121   if (hashmark)
 122     putchar_unfiltered ('\n');
 123 }
 124
 125 #endif /* USE_GENERIC_LOAD */
 126
 127 /* This array of registers need to match the indexes used by GDB.
 128    This exists because the various ROM monitors use different strings
 129    than does GDB, and don't necessarily support all the registers
 130    either. So, typing "info reg sp" becomes a "r30".  */
 131
 132 /* these correspond to the offsets from tm-* files from config directories */
 133 /* g0-g14, fp, pfp, sp, rip,r3-15, pc, ac, tc, fp0-3 */
 134 /* NOTE: "ip" is documented as "ir" in the Mon960 UG. */
 135 /* NOTE: "ir" can't be accessed... but there's an ip and rip. */
 136 static char *mon960_regnames[NUM_REGS] = {
 137   /*  0 */ "pfp", "sp",  "rip", "r3",  "r4",  "r5",  "r6",  "r7",
 138   /*  8 */ "r8",  "r9",  "r10", "r11", "r12", "r13", "r14", "r15",
 139   /* 16 */ "g0",  "g1",  "g2",  "g3",  "g4",  "g5",  "g6",  "g7",
 140   /* 24 */ "g8",  "g9",  "g10", "g11", "g12", "g13", "g14", "fp",
 141   /* 32 */ "pc",  "ac",  "tc",  "ip",  "fp0", "fp1", "fp2", "fp3",
 142   };
 143
 144 /* Define the monitor command strings. Since these are passed directly
 145    through to a printf style function, we may include formatting
 146    strings. We also need a CR or LF on the end.  */
 147
 148 /* need to pause the monitor for timing reasons, so slow it down */
 149
 150 static char *mon960_inits[] = {"\n\r\r\r\r\r\r\r\r\r\r\r\r\r\r\n\r\n\r\n", NULL};
 151
 152 static struct monitor_ops mon960_cmds =
 153 {
 154   MO_CLR_BREAK_USES_ADDR
 155     | MO_NO_ECHO_ON_OPEN
 156     | MO_SEND_BREAK_ON_STOP
 157     | MO_GETMEM_READ_SINGLE,    /* flags */
 158   mon960_inits,                 /* Init strings */
 159   "go\n\r",                     /* continue command */
 160   "st\n\r",                     /* single step */
 161   "\n\r",                       /* break interrupts the program */
 162   NULL,                         /* set a breakpoint */
 163                                 /* can't use "br" because only 2 hw bps are supported */
 164   NULL,                         /* clear a breakpoint - "de" is for hw bps */
 165   NULL,                         /* clear all breakpoints */
 166   NULL,                         /* fill (start end val) */
 167                                 /* can't use "fi" because it takes words, not bytes */
 168   {
 169     /* can't use "mb", "md" or "mo" because they require interaction */
 170     NULL,                       /* setmem.cmdb (addr, value) */
 171     "md %x %x\n\r",             /* setmem.cmdw (addr, value) */
 172     NULL,                       /* setmem.cmdl (addr, value) */
 173     NULL,                       /* setmem.cmdll (addr, value) */
 174     NULL,                       /* setmem.resp_delim */
 175     NULL,                       /* setmem.term */
 176     NULL,                       /* setmem.term_cmd */
 177   },
 178   {
 179     /* since the parsing of multiple bytes is difficult due to
 180        interspersed addresses, we'll only read 1 value at a time,
 181        even tho these can handle a count */
 182     "db %x\n\r",                /* getmem.cmdb (addr, #bytes) */
 183     "ds %x\n\r",                /* getmem.cmdw (addr, #swords) */
 184     "di %x\n\r",                /* getmem.cmdl (addr, #words) */
 185     "dd %x\n\r",                /* getmem.cmdll (addr, #dwords) */
 186     " : ",                      /* getmem.resp_delim */
 187     NULL,                       /* getmem.term */
 188     NULL,                       /* getmem.term_cmd */
 189   },
 190   {
 191     "md %s %x\n\r",             /* setreg.cmd (name, value) */
 192     NULL,                       /* setreg.resp_delim */
 193     NULL,                       /* setreg.term */
 194     NULL                        /* setreg.term_cmd */
 195   },
 196   {
 197     "di %s\n\r",                /* getreg.cmd (name) */
 198     " : ",                      /* getreg.resp_delim */
 199     NULL,                       /* getreg.term */
 200     NULL,                       /* getreg.term_cmd */
 201   },
 202   "re\n\r",                     /* dump_registers */
 203   "\\(\\w+\\)=\\([0-9a-fA-F]+\\)",      /* register_pattern */
 204   NULL,                         /* supply_register */
 205 #ifdef USE_GENERIC_LOAD
 206   NULL,                         /* load_routine (defaults to SRECs) */
 207   NULL,                         /* download command */
 208   NULL,                         /* load response */
 209 #else
 210   mon960_load,                  /* load_routine (defaults to SRECs) */
 211   "do\n\r",                     /* download command */
 212   "Downloading\n\r",            /* load response */
 213 #endif
 214   "=>",                         /* monitor command prompt */
 215   "\n\r",                       /* end-of-command delimitor */
 216   NULL,                         /* optional command terminator */
 217   &mon960_ops,                  /* target operations */
 218   SERIAL_1_STOPBITS,            /* number of stop bits */
 219   mon960_regnames,              /* registers names */
 220   MONITOR_OPS_MAGIC             /* magic */
 221 };
 222
 223 static void
 224 mon960_open (args, from_tty)
 225      char *args;
 226      int from_tty;
 227 {
 228   monitor_open (args, &mon960_cmds, from_tty);
 229 }
 230
 231 void
 232 _initialize_mon960 ()
 233 {
 234   init_monitor_ops (&mon960_ops);
 235
 236   mon960_ops.to_shortname = "mon960"; /* for the target command */
 237   mon960_ops.to_longname = "Intel 960 MON960 monitor";
 238 #ifdef USE_GENERIC_LOAD
 239   mon960_ops.to_load = mon960_load_gen; /* FIXME - should go back and try "do" */
 240 #endif
 241   /* use SW breaks; target only supports 2 HW breakpoints */
 242   mon960_ops.to_insert_breakpoint = memory_insert_breakpoint;
 243   mon960_ops.to_remove_breakpoint = memory_remove_breakpoint;
 244
 245   mon960_ops.to_doc =
 246     "Use an Intel 960 board running the MON960 debug monitor.\n\
 247 Specify the serial device it is connected to (e.g. /dev/ttya).";
 248
 249   mon960_ops.to_open = mon960_open;
 250   add_target (&mon960_ops);
 251 }
 252