gdb/mi/mi-cmd-disas.c

   1 /* MI Command Set - disassemble commands.
   2    Copyright (C) 2000-2017 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions (a Red Hat company).
   4
   5    This file is part of GDB.
   6
   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.
  11
  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.
  16
  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/>.  */
  19
  20 #include "defs.h"
  21 #include "arch-utils.h"
  22 #include "target.h"
  23 #include "value.h"
  24 #include "mi-cmds.h"
  25 #include "mi-getopt.h"
  26 #include "ui-out.h"
  27 #include "disasm.h"
  28
  29 /* The arguments to be passed on the command line and parsed here are
  30    either:
  31
  32    START-ADDRESS: address to start the disassembly at.
  33    END-ADDRESS: address to end the disassembly at.
  34
  35    or:
  36
  37    FILENAME: The name of the file where we want disassemble from.
  38    LINE: The line around which we want to disassemble. It will
  39    disassemble the function that contins that line.
  40    HOW_MANY: Number of disassembly lines to display. With source, it
  41    is the number of disassembly lines only, not counting the source
  42    lines.
  43
  44    always required:
  45
  46    MODE: 0 -- disassembly.
  47          1 -- disassembly and source (with deprecated source-centric view).
  48          2 -- disassembly and opcodes.
  49          3 -- disassembly, source-centric and opcodes.
  50          4 -- disassembly, and source (with pc-centric view).
  51          5 -- disassembly, source (pc-centric) and opcodes.  */
  52
  53 void
  54 mi_cmd_disassemble (const char *command, char **argv, int argc)
  55 {
  56   struct gdbarch *gdbarch = get_current_arch ();
  57   struct ui_out *uiout = current_uiout;
  58   CORE_ADDR start;
  59
  60   int mode;
  61   gdb_disassembly_flags disasm_flags;
  62   struct symtab *s;
  63
  64   /* Which options have we processed ... */
  65   int file_seen = 0;
  66   int line_seen = 0;
  67   int num_seen = 0;
  68   int start_seen = 0;
  69   int end_seen = 0;
  70
  71   /* ... and their corresponding value. */
  72   char *file_string = NULL;
  73   int line_num = -1;
  74   int how_many = -1;
  75   CORE_ADDR low = 0;
  76   CORE_ADDR high = 0;
  77   struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
  78
  79   /* Options processing stuff.  */
  80   int oind = 0;
  81   char *oarg;
  82   enum opt
  83   {
  84     FILE_OPT, LINE_OPT, NUM_OPT, START_OPT, END_OPT
  85   };
  86   static const struct mi_opt opts[] =
  87     {
  88       {"f", FILE_OPT, 1},
  89       {"l", LINE_OPT, 1},
  90       {"n", NUM_OPT, 1},
  91       {"s", START_OPT, 1},
  92       {"e", END_OPT, 1},
  93       { 0, 0, 0 }
  94     };
  95
  96   /* Get the options with their arguments. Keep track of what we
  97      encountered.  */
  98   while (1)
  99     {
 100       int opt = mi_getopt ("-data-disassemble", argc, argv, opts,
 101                            &oind, &oarg);
 102       if (opt < 0)
 103         break;
 104       switch ((enum opt) opt)
 105         {
 106         case FILE_OPT:
 107           file_string = xstrdup (oarg);
 108           file_seen = 1;
 109           make_cleanup (xfree, file_string);
 110           break;
 111         case LINE_OPT:
 112           line_num = atoi (oarg);
 113           line_seen = 1;
 114           break;
 115         case NUM_OPT:
 116           how_many = atoi (oarg);
 117           num_seen = 1;
 118           break;
 119         case START_OPT:
 120           low = parse_and_eval_address (oarg);
 121           start_seen = 1;
 122           break;
 123         case END_OPT:
 124           high = parse_and_eval_address (oarg);
 125           end_seen = 1;
 126           break;
 127         }
 128     }
 129   argv += oind;
 130   argc -= oind;
 131
 132   /* Allow only filename + linenum (with how_many which is not
 133      required) OR start_addr + end_addr.  */
 134
 135   if (!((line_seen && file_seen && num_seen && !start_seen && !end_seen)
 136         || (line_seen && file_seen && !num_seen && !start_seen && !end_seen)
 137         || (!line_seen && !file_seen && !num_seen && start_seen && end_seen)))
 138     error (_("-data-disassemble: Usage: ( [-f filename -l linenum [-n "
 139              "howmany]] | [-s startaddr -e endaddr]) [--] mode."));
 140
 141   if (argc != 1)
 142     error (_("-data-disassemble: Usage: [-f filename -l linenum "
 143              "[-n howmany]] [-s startaddr -e endaddr] [--] mode."));
 144
 145   mode = atoi (argv[0]);
 146   if (mode < 0 || mode > 5)
 147     error (_("-data-disassemble: Mode argument must be in the range 0-5."));
 148
 149   /* Convert the mode into a set of disassembly flags.  */
 150
 151   disasm_flags = 0;  /* Initialize here for -Wall.  */
 152   switch (mode)
 153     {
 154     case 0:
 155       break;
 156     case 1:
 157       disasm_flags |= DISASSEMBLY_SOURCE_DEPRECATED;
 158       break;
 159     case 2:
 160       disasm_flags |= DISASSEMBLY_RAW_INSN;
 161       break;
 162     case 3:
 163       disasm_flags |= DISASSEMBLY_SOURCE_DEPRECATED | DISASSEMBLY_RAW_INSN;
 164       break;
 165     case 4:
 166       disasm_flags |= DISASSEMBLY_SOURCE;
 167       break;
 168     case 5:
 169       disasm_flags |= DISASSEMBLY_SOURCE | DISASSEMBLY_RAW_INSN;
 170       break;
 171     default:
 172       gdb_assert_not_reached ("bad disassembly mode");
 173     }
 174
 175   /* We must get the function beginning and end where line_num is
 176      contained.  */
 177
 178   if (line_seen && file_seen)
 179     {
 180       s = lookup_symtab (file_string);
 181       if (s == NULL)
 182         error (_("-data-disassemble: Invalid filename."));
 183       if (!find_line_pc (s, line_num, &start))
 184         error (_("-data-disassemble: Invalid line number"));
 185       if (find_pc_partial_function (start, NULL, &low, &high) == 0)
 186         error (_("-data-disassemble: "
 187                  "No function contains specified address"));
 188     }
 189
 190   gdb_disassembly (gdbarch, uiout,
 191                    disasm_flags,
 192                    how_many, low, high);
 193
 194   do_cleanups (cleanups);
 195 }