1/* Disassemble from a buffer, for GNU.
2   Copyright 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005
3   Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 2 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program; if not, write to the Free Software
17   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
18   MA 02110-1301, USA.  */
19
20#include "sysdep.h"
21#include "dis-asm.h"
22#include <errno.h>
23#include "opintl.h"
24
25/* Get LENGTH bytes from info's buffer, at target address memaddr.
26   Transfer them to myaddr.  */
27int
28buffer_read_memory (bfd_vma memaddr,
29		    bfd_byte *myaddr,
30		    unsigned int length,
31		    struct disassemble_info *info)
32{
33  unsigned int opb = info->octets_per_byte;
34  unsigned int end_addr_offset = length / opb;
35  unsigned int max_addr_offset = info->buffer_length / opb;
36  unsigned int octets = (memaddr - info->buffer_vma) * opb;
37
38  if (memaddr < info->buffer_vma
39      || memaddr - info->buffer_vma + end_addr_offset > max_addr_offset)
40    /* Out of bounds.  Use EIO because GDB uses it.  */
41    return EIO;
42  memcpy (myaddr, info->buffer + octets, length);
43
44  return 0;
45}
46
47/* Print an error message.  We can assume that this is in response to
48   an error return from buffer_read_memory.  */
49
50void
51perror_memory (int status,
52	       bfd_vma memaddr,
53	       struct disassemble_info *info)
54{
55  if (status != EIO)
56    /* Can't happen.  */
57    info->fprintf_func (info->stream, _("Unknown error %d\n"), status);
58  else
59    {
60      char buf[30];
61
62      /* Actually, address between memaddr and memaddr + len was
63	 out of bounds.  */
64      sprintf_vma (buf, memaddr);
65      info->fprintf_func (info->stream,
66			  _("Address 0x%s is out of bounds.\n"), buf);
67    }
68}
69
70/* This could be in a separate file, to save miniscule amounts of space
71   in statically linked executables.  */
72
73/* Just print the address is hex.  This is included for completeness even
74   though both GDB and objdump provide their own (to print symbolic
75   addresses).  */
76
77void
78generic_print_address (bfd_vma addr, struct disassemble_info *info)
79{
80  char buf[30];
81
82  sprintf_vma (buf, addr);
83  (*info->fprintf_func) (info->stream, "0x%s", buf);
84}
85
86/* Just return true.  */
87
88int
89generic_symbol_at_address (bfd_vma addr ATTRIBUTE_UNUSED,
90			   struct disassemble_info *info ATTRIBUTE_UNUSED)
91{
92  return 1;
93}
94
95/* Just return TRUE.  */
96
97bfd_boolean
98generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED,
99			 struct disassemble_info *info ATTRIBUTE_UNUSED)
100{
101  return TRUE;
102}
103