aboutsummaryrefslogtreecommitdiff
path: root/gdb/disasm.h
blob: 42c1f3af6d48bed68722b95554849494b4e85d74 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
/* Disassemble support for GDB.
   Copyright (C) 2002-2017 Free Software Foundation, Inc.

   This file is part of GDB.

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

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

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

#ifndef DISASM_H
#define DISASM_H

#include "dis-asm.h"

#define DISASSEMBLY_SOURCE_DEPRECATED (0x1 << 0)
#define DISASSEMBLY_RAW_INSN	(0x1 << 1)
#define DISASSEMBLY_OMIT_FNAME	(0x1 << 2)
#define DISASSEMBLY_FILENAME	(0x1 << 3)
#define DISASSEMBLY_OMIT_PC	(0x1 << 4)
#define DISASSEMBLY_SOURCE	(0x1 << 5)
#define DISASSEMBLY_SPECULATIVE	(0x1 << 6)

struct gdbarch;
struct ui_out;
struct ui_file;

class gdb_disassembler
{
  using di_read_memory_ftype = decltype (disassemble_info::read_memory_func);

public:
  gdb_disassembler (struct gdbarch *gdbarch, struct ui_file *file)
    : gdb_disassembler (gdbarch, file, dis_asm_read_memory)
  {}

  int print_insn (CORE_ADDR memaddr, int *branch_delay_insns = NULL);

  /* Return the gdbarch of gdb_disassembler.  */
  struct gdbarch *arch ()
  { return m_gdbarch; }

protected:
  gdb_disassembler (struct gdbarch *gdbarch, struct ui_file *file,
		    di_read_memory_ftype func);

  struct ui_file *stream ()
  { return (struct ui_file *) m_di.stream; }

private:
  struct gdbarch *m_gdbarch;

  /* Stores data required for disassembling instructions in
     opcodes.  */
  struct disassemble_info m_di;
  CORE_ADDR m_err_memaddr;

  static int dis_asm_read_memory (bfd_vma memaddr, gdb_byte *myaddr,
				  unsigned int len,
				  struct disassemble_info *info);
  static void dis_asm_memory_error (int err, bfd_vma memaddr,
				    struct disassemble_info *info);
  static void dis_asm_print_address (bfd_vma addr,
				     struct disassemble_info *info);
};

/* An instruction to be disassembled.  */

struct disasm_insn
{
  /* The address of the memory containing the instruction.  */
  CORE_ADDR addr;

  /* An optional instruction number.  If non-zero, it is printed first.  */
  unsigned int number;

  /* True if the instruction was executed speculatively.  */
  unsigned int is_speculative:1;
};

extern void gdb_disassembly (struct gdbarch *gdbarch, struct ui_out *uiout,
			     int flags, int how_many,
			     CORE_ADDR low, CORE_ADDR high);

/* Print the instruction at address MEMADDR in debugged memory,
   on STREAM.  Returns the length of the instruction, in bytes,
   and, if requested, the number of branch delay slot instructions.  */

extern int gdb_print_insn (struct gdbarch *gdbarch, CORE_ADDR memaddr,
			   struct ui_file *stream, int *branch_delay_insns);

/* Class used to pretty-print instructions.  */

class gdb_pretty_print_disassembler
{
public:
  explicit gdb_pretty_print_disassembler (struct gdbarch *gdbarch)
    : m_di (gdbarch, &m_insn_stb)
  {}

  /* Prints the instruction INSN into UIOUT and returns the length of
     the printed instruction in bytes.  */
  int pretty_print_insn (struct ui_out *uiout, const struct disasm_insn *insn,
			 int flags);

private:
  /* Returns the architecture used for disassembling.  */
  struct gdbarch *arch () { return m_di.arch (); }

  /* The disassembler used for instruction printing.  */
  gdb_disassembler m_di;

  /* The buffer used to build the instruction string.  The
     disassembler is initialized with this stream.  */
  string_file m_insn_stb;

  /* The buffer used to build the raw opcodes string.  */
  string_file m_opcode_stb;
};

/* Return the length in bytes of the instruction at address MEMADDR in
   debugged memory.  */

extern int gdb_insn_length (struct gdbarch *gdbarch, CORE_ADDR memaddr);

/* Return the length in bytes of INSN, originally at MEMADDR.  MAX_LEN
   is the size of the buffer containing INSN.  */

extern int gdb_buffered_insn_length (struct gdbarch *gdbarch,
				     const gdb_byte *insn, int max_len,
				     CORE_ADDR memaddr);

#endif