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. */
27 int
buffer_read_memory(bfd_vma memaddr,bfd_byte * myaddr,unsigned int length,struct disassemble_info * info)28 buffer_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
50 void
perror_memory(int status,bfd_vma memaddr,struct disassemble_info * info)51 perror_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
77 void
generic_print_address(bfd_vma addr,struct disassemble_info * info)78 generic_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
88 int
generic_symbol_at_address(bfd_vma addr ATTRIBUTE_UNUSED,struct disassemble_info * info ATTRIBUTE_UNUSED)89 generic_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
97 bfd_boolean
generic_symbol_is_valid(asymbol * sym ATTRIBUTE_UNUSED,struct disassemble_info * info ATTRIBUTE_UNUSED)98 generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED,
99 struct disassemble_info *info ATTRIBUTE_UNUSED)
100 {
101 return TRUE;
102 }
103