gdb/microblaze-rom.c - gdb

Global variables defined

Functions defined

Source code

  1. /* Remote debugging interface to Xilinx MicroBlaze.

  3.    Copyright (C) 2009-2015 Free Software Foundation, Inc.

  5.    This file is part of GDB.

  7.    This program is free software; you can redistribute it and/or modify
  8.    it under the terms of the GNU General Public License as published by
  9.    the Free Software Foundation; either version 3 of the License, or
  10.    (at your option) any later version.

  12.    This program is distributed in the hope that it will be useful,
  13.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15.    GNU General Public License for more details.

  17.    You should have received a copy of the GNU General Public License
  18.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  20. #include "defs.h"
  21. #include "gdbcore.h"
  22. #include "target.h"
  23. #include "monitor.h"
  24. #include "serial.h"
  25. #include "regcache.h"

  27. void _initialize_picobug_rom (void);

  29. ‌static char *picobug_inits[] =
  30. {"\r", NULL};

  32. ‌static struct target_ops picobug_ops;
  33. ‌static struct monitor_ops picobug_cmds;

  35. /* Picobug only supports a subset of registers from MCore.  In reality,
  36.    it doesn't support ss1, either.  */
  37. ‌static char *picobug_regnames[] = {
  38.   "r0",   "r1",   "r2",   "r3",   "r4",   "r5",   "r6",   "r7",
  39.   "r8",   "r9",   "r10",  "r11",  "r12",  "r13",  "r14",  "r15",
  40.   0,      0,      0,      0,      0,      0,      0,      0,
  41.   0,      0,      0,      0,      0,      0,      0,      0,
  42.   "psr",  "vbr",  "epsr", "fpsr", "epc",  "fpc",  0,      "ss1",
  43.   "ss2",  "ss3",  "ss4",  0,      0,      0,      0,      0,
  44.   0,      0,      0,      0,      0,      0,      0,      0,
  45.   0,      0,      0,      0,      0,      0,      0,      0,
  46.   "pc" };



  50. static void
  51. ‌picobug_open (const char *args, int from_tty)
  52. {
  53.   monitor_open (args, &picobug_cmds, from_tty);
  54. }
  55. /* We choose to write our own dumpregs routine, since the output of
  56.    the register dumping is rather difficult to encapsulate in a
  57.    regexp:

  59. picobug> rd
  60.      pc 2f00031e      epc 2f00031e      fpc 00000000
  61.     psr 80000101     epsr 80000101     fpsr 00000000
  62. ss0-ss4 bad0beef 00000000 00000000 00000000 00000000      vbr 30005c00
  63.   r0-r7 2f0fff4c 00000090 00000001 00000002 00000003 00000004 00000005 00000006
  64. r8-r15 2f0fff64 00000000 00000000 00000000 00000000 00000000 00000000 2f00031e
  65. */

  67. static int
  68. ‌picobug_dumpregs (struct regcache *regcache)
  69. {
  70.   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  71.   char buf[1024];
  72.   int resp_len;
  73.   char *p;

  75.   /* Send the dump register command to the monitor and
  76.      get the reply.  */
  77.   monitor_printf (picobug_cmds.dump_registers);
  78.   resp_len = monitor_expect_prompt (buf, sizeof (buf));

  80.   p = strtok (buf, " \t\r\n");
  81.   while (p)
  82.     {
  83.       if (strchr (p, '-'))
  84.         {
  85.           /* Got a range.  Either r0-r7, r8-r15 or ss0-ss4.  */
  86.           if (strncmp (p, "r0", 2) == 0 || strncmp (p, "r8", 2) == 0)
  87.             {
  88.               int rn = (p[1] == '0' ? 0 : 8);
  89.               int i = 0;

  91.               /* Get the next 8 values and record them.  */
  92.               while (i < 8)
  93.                 {
  94.                   p = strtok (NULL, " \t\r\n");
  95.                   if (p)
  96.                     monitor_supply_register (regcache, rn + i, p);
  97.                   i++;
  98.                 }
  99.             }
  100.           else if (strncmp (p, "ss", 2) == 0)
  101.             {
  102.               /* Get the next five values, ignoring the first.  */
  103.               int rn;
  104.               p = strtok (NULL, " \t\r\n");
  105.               for (rn = 39; rn < 43; rn++)
  106.                 {
  107.                   p = strtok (NULL, " \t\r\n");
  108.                   if (p)
  109.                     monitor_supply_register (regcache, rn, p);
  110.                 }
  111.             }
  112.           else
  113.             {
  114.               break;
  115.             }
  116.         }
  117.       else
  118.         {
  119.           /* Simple register type, paired.  */
  120.           char *name = p;
  121.           int i;

  123.           /* Get and record value.  */
  124.           p = strtok (NULL, " \t\r\n");
  125.           if (p)
  126.             {
  127.               for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
  128.                 {
  129.                   if (picobug_regnames[i]
  130.                       && strcmp (picobug_regnames[i], name) == 0)
  131.                     break;
  132.                 }

  134.               if (i <= gdbarch_num_regs (gdbarch))
  135.                 monitor_supply_register (regcache, i, p);
  136.             }
  137.         }
  138.       p = strtok (NULL, " \t\r\n");
  139.     }

  141.   return 0;
  142. }

  144. static void
  145. ‌init_picobug_cmds (void)
  146. {
  147.   picobug_cmds.flags = MO_GETMEM_NEEDS_RANGE | MO_CLR_BREAK_USES_ADDR
  148.                        | MO_PRINT_PROGRAM_OUTPUT;

  150.   picobug_cmds.init = picobug_inits;                /* Init strings                */
  151.   picobug_cmds.cont = "g\n";                        /* continue command        */
  152.   picobug_cmds.step = "s\n";                        /* single step                */
  153.   picobug_cmds.set_break = "br %x\n";                /* set a breakpoint        */
  154.   picobug_cmds.clr_break = "nobr %x\n";                /* clear a breakpoint        */
  155.   picobug_cmds.clr_all_break = "nobr\n";        /* clear all breakpoints */
  156.   picobug_cmds.setmem.cmdb = "mm %x %x ;b\n";        /* setmem.cmdb (addr, value) */
  157.   picobug_cmds.setmem.cmdw = "mm %x %x ;h\n";        /* setmem.cmdw (addr, value) */
  158.   picobug_cmds.setmem.cmdl = "mm %x %x ;w\n";        /* setmem.cmdl (addr, value) */
  159.   picobug_cmds.getmem.cmdb = "md %x %x\n";        /* getmem.cmdb (start addr,
  160.                                                    end addr)                 */
  161.   picobug_cmds.getmem.resp_delim = ":";                /* getmem.resp_delim        */
  162.   picobug_cmds.setreg.cmd = "rm %s %x\n";        /* setreg.cmd (name, value) */
  163.   picobug_cmds.getreg.cmd = "rd %s\n";                /* getreg.cmd (name)        */
  164.   picobug_cmds.getreg.resp_delim = ":";                /* getreg.resp_delim        */
  165.   picobug_cmds.dump_registers = "rd\n";                /* dump_registers        */
  166.   picobug_cmds.dumpregs = picobug_dumpregs;        /* dump registers parser */
  167.   picobug_cmds.load = "lo\n";                        /* download command        */
  168.   picobug_cmds.prompt = "picobug> ";                /* monitor command prompt */
  169.   picobug_cmds.line_term = "\n";                /* end-of-line terminator */
  170.   picobug_cmds.target = &picobug_ops;                /* target operations        */
  171.   picobug_cmds.stopbits = SERIAL_1_STOPBITS;        /* number of stop bits        */
  172.   picobug_cmds.regnames = picobug_regnames;        /* registers names        */
  173.   picobug_cmds.num_breakpoints = 20;                /* number of breakpoints */
  174.   picobug_cmds.magic = MONITOR_OPS_MAGIC;        /* magic                */
  175. }

  177. void
  178. ‌_initialize_picobug_rom (void)
  179. {
  180.   int i;

  182.   /* Initialize m32r RevC monitor target.  */
  183.   init_picobug_cmds ();
  184.   init_monitor_ops (&picobug_ops);
  185.   picobug_ops.to_shortname = "picobug";
  186.   picobug_ops.to_longname = "picobug monitor";
  187.   picobug_ops.to_doc = "Debug via the picobug monitor.\n\
  188. Specify the serial device it is connected to (e.g. /dev/ttya).";
  189.   picobug_ops.to_open = picobug_open;

  191.   add_target (&picobug_ops);
  192. }