GDB (xrefs)
mi-cmd-disas.c
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1 /* MI Command Set - disassemble commands.
2  Copyright (C) 2000-2015 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.
48  2 -- disassembly and opcodes.
49  3 -- disassembly, source and opcodes.
50 */
51 
52 void
53 mi_cmd_disassemble (char *command, char **argv, int argc)
54 {
55  struct gdbarch *gdbarch = get_current_arch ();
56  struct ui_out *uiout = current_uiout;
57  CORE_ADDR start;
58 
59  int mode, disasm_flags;
60  struct symtab *s;
61 
62  /* Which options have we processed ... */
63  int file_seen = 0;
64  int line_seen = 0;
65  int num_seen = 0;
66  int start_seen = 0;
67  int end_seen = 0;
68 
69  /* ... and their corresponding value. */
70  char *file_string = NULL;
71  int line_num = -1;
72  int how_many = -1;
73  CORE_ADDR low = 0;
74  CORE_ADDR high = 0;
75  struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
76 
77  /* Options processing stuff. */
78  int oind = 0;
79  char *oarg;
80  enum opt
81  {
82  FILE_OPT, LINE_OPT, NUM_OPT, START_OPT, END_OPT
83  };
84  static const struct mi_opt opts[] =
85  {
86  {"f", FILE_OPT, 1},
87  {"l", LINE_OPT, 1},
88  {"n", NUM_OPT, 1},
89  {"s", START_OPT, 1},
90  {"e", END_OPT, 1},
91  { 0, 0, 0 }
92  };
93 
94  /* Get the options with their arguments. Keep track of what we
95  encountered. */
96  while (1)
97  {
98  int opt = mi_getopt ("-data-disassemble", argc, argv, opts,
99  &oind, &oarg);
100  if (opt < 0)
101  break;
102  switch ((enum opt) opt)
103  {
104  case FILE_OPT:
105  file_string = xstrdup (oarg);
106  file_seen = 1;
107  make_cleanup (xfree, file_string);
108  break;
109  case LINE_OPT:
110  line_num = atoi (oarg);
111  line_seen = 1;
112  break;
113  case NUM_OPT:
114  how_many = atoi (oarg);
115  num_seen = 1;
116  break;
117  case START_OPT:
118  low = parse_and_eval_address (oarg);
119  start_seen = 1;
120  break;
121  case END_OPT:
122  high = parse_and_eval_address (oarg);
123  end_seen = 1;
124  break;
125  }
126  }
127  argv += oind;
128  argc -= oind;
129 
130  /* Allow only filename + linenum (with how_many which is not
131  required) OR start_addr + end_addr. */
132 
133  if (!((line_seen && file_seen && num_seen && !start_seen && !end_seen)
134  || (line_seen && file_seen && !num_seen && !start_seen && !end_seen)
135  || (!line_seen && !file_seen && !num_seen && start_seen && end_seen)))
136  error (_("-data-disassemble: Usage: ( [-f filename -l linenum [-n "
137  "howmany]] | [-s startaddr -e endaddr]) [--] mode."));
138 
139  if (argc != 1)
140  error (_("-data-disassemble: Usage: [-f filename -l linenum "
141  "[-n howmany]] [-s startaddr -e endaddr] [--] mode."));
142 
143  mode = atoi (argv[0]);
144  if (mode < 0 || mode > 3)
145  error (_("-data-disassemble: Mode argument must be 0, 1, 2, or 3."));
146 
147  /* Convert the mode into a set of disassembly flags. */
148 
149  disasm_flags = 0;
150  if (mode & 0x1)
151  disasm_flags |= DISASSEMBLY_SOURCE;
152  if (mode & 0x2)
153  disasm_flags |= DISASSEMBLY_RAW_INSN;
154 
155  /* We must get the function beginning and end where line_num is
156  contained. */
157 
158  if (line_seen && file_seen)
159  {
160  s = lookup_symtab (file_string);
161  if (s == NULL)
162  error (_("-data-disassemble: Invalid filename."));
163  if (!find_line_pc (s, line_num, &start))
164  error (_("-data-disassemble: Invalid line number"));
165  if (find_pc_partial_function (start, NULL, &low, &high) == 0)
166  error (_("-data-disassemble: "
167  "No function contains specified address"));
168  }
169 
170  gdb_disassembly (gdbarch, uiout,
171  file_string,
172  disasm_flags,
173  how_many, low, high);
174 
175  do_cleanups (cleanups);
176 }
#define DISASSEMBLY_SOURCE
Definition: disasm.h:24
bfd_vma CORE_ADDR
Definition: common-types.h:41
void xfree(void *)
Definition: common-utils.c:97
struct symtab * lookup_symtab(const char *name)
Definition: symtab.c:489
#define _(String)
Definition: gdb_locale.h:40
Definition: ui-out.c:99
void null_cleanup(void *arg)
Definition: cleanups.c:295
int mi_getopt(const char *prefix, int argc, char **argv, const struct mi_opt *opts, int *oind, char **oarg)
Definition: mi-getopt.c:83
struct cleanup * make_cleanup(make_cleanup_ftype *function, void *arg)
Definition: cleanups.c:117
void mi_cmd_disassemble(char *command, char **argv, int argc)
Definition: mi-cmd-disas.c:53
int find_pc_partial_function(CORE_ADDR pc, const char **name, CORE_ADDR *address, CORE_ADDR *endaddr)
Definition: blockframe.c:321
struct gdbarch * get_current_arch(void)
Definition: arch-utils.c:781
Definition: symtab.h:925
void gdb_disassembly(struct gdbarch *gdbarch, struct ui_out *uiout, char *file_string, int flags, int how_many, CORE_ADDR low, CORE_ADDR high)
Definition: disasm.c:406
int find_line_pc(struct symtab *symtab, int line, CORE_ADDR *pc)
Definition: symtab.c:3484
CORE_ADDR parse_and_eval_address(const char *exp)
Definition: eval.c:96
#define DISASSEMBLY_RAW_INSN
Definition: disasm.h:25
struct ui_out * current_uiout
Definition: ui-out.c:233
void error(const char *fmt,...)
Definition: errors.c:38
void do_cleanups(struct cleanup *old_chain)
Definition: cleanups.c:175