1/* Disassemble from a buffer, for GNU.
2   Copyright 1993, 1994, 1996, 1997, 1998, 1999, 2000
3   Free Software Foundation, Inc.
4
5This program is free software; you can redistribute it and/or modify
6it under the terms of the GNU General Public License as published by
7the Free Software Foundation; either version 2 of the License, or
8(at your option) any later version.
9
10This program is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License
16along with this program; if not, write to the Free Software
17Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
18
19#include "sysdep.h"
20#include "dis-asm.h"
21#include <errno.h>
22#include "opintl.h"
23
24/* Get LENGTH bytes from info's buffer, at target address memaddr.
25   Transfer them to myaddr.  */
26int
27buffer_read_memory (memaddr, myaddr, length, info)
28     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.  */
49void
50perror_memory (status, memaddr, info)
51     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    /* Actually, address between memaddr and memaddr + len was
60       out of bounds.  */
61    info->fprintf_func (info->stream,
62			_("Address 0x%x is out of bounds.\n"), memaddr);
63}
64
65/* This could be in a separate file, to save miniscule amounts of space
66   in statically linked executables.  */
67
68/* Just print the address is hex.  This is included for completeness even
69   though both GDB and objdump provide their own (to print symbolic
70   addresses).  */
71
72void
73generic_print_address (addr, info)
74     bfd_vma addr;
75     struct disassemble_info *info;
76{
77  char buf[30];
78
79  sprintf_vma (buf, addr);
80  (*info->fprintf_func) (info->stream, "0x%s", buf);
81}
82
83#if 0
84/* Just concatenate the address as hex.  This is included for
85   completeness even though both GDB and objdump provide their own (to
86   print symbolic addresses).  */
87
88void generic_strcat_address PARAMS ((bfd_vma, char *, int));
89
90void
91generic_strcat_address (addr, buf, len)
92     bfd_vma addr;
93     char *buf;
94     int len;
95{
96  if (buf != (char *)NULL && len > 0)
97    {
98      char tmpBuf[30];
99
100      sprintf_vma (tmpBuf, addr);
101      if ((strlen (buf) + strlen (tmpBuf)) <= (unsigned int) len)
102	strcat (buf, tmpBuf);
103      else
104	strncat (buf, tmpBuf, (len - strlen(buf)));
105    }
106  return;
107}
108#endif
109
110/* Just return true.  */
111
112int
113generic_symbol_at_address (addr, info)
114     bfd_vma addr ATTRIBUTE_UNUSED;
115     struct disassemble_info *info ATTRIBUTE_UNUSED;
116{
117  return 1;
118}
119
120/* Just return TRUE.  */
121
122bfd_boolean
123generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED,
124			 struct disassemble_info *info ATTRIBUTE_UNUSED)
125{
126  return TRUE;
127}
128