gas/
[binutils.git] / opcodes / dis-buf.c
blob6a3177248301353e36ac201317255210726d9172
1 /* Disassemble from a buffer, for GNU.
2 Copyright 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005,
3 2007 Free Software Foundation, Inc.
5 This file is part of the GNU opcodes library.
7 This library 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, or (at your option)
10 any later version.
12 It is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
22 #include "sysdep.h"
23 #include "dis-asm.h"
24 #include <errno.h>
25 #include "opintl.h"
27 /* Get LENGTH bytes from info's buffer, at target address memaddr.
28 Transfer them to myaddr. */
29 int
30 buffer_read_memory (bfd_vma memaddr,
31 bfd_byte *myaddr,
32 unsigned int length,
33 struct disassemble_info *info)
35 unsigned int opb = info->octets_per_byte;
36 unsigned int end_addr_offset = length / opb;
37 unsigned int max_addr_offset = info->buffer_length / opb;
38 unsigned int octets = (memaddr - info->buffer_vma) * opb;
40 if (memaddr < info->buffer_vma
41 || memaddr - info->buffer_vma + end_addr_offset > max_addr_offset)
42 /* Out of bounds. Use EIO because GDB uses it. */
43 return EIO;
44 memcpy (myaddr, info->buffer + octets, length);
46 return 0;
49 /* Print an error message. We can assume that this is in response to
50 an error return from buffer_read_memory. */
52 void
53 perror_memory (int status,
54 bfd_vma memaddr,
55 struct disassemble_info *info)
57 if (status != EIO)
58 /* Can't happen. */
59 info->fprintf_func (info->stream, _("Unknown error %d\n"), status);
60 else
62 char buf[30];
64 /* Actually, address between memaddr and memaddr + len was
65 out of bounds. */
66 sprintf_vma (buf, memaddr);
67 info->fprintf_func (info->stream,
68 _("Address 0x%s is out of bounds.\n"), buf);
72 /* This could be in a separate file, to save miniscule amounts of space
73 in statically linked executables. */
75 /* Just print the address is hex. This is included for completeness even
76 though both GDB and objdump provide their own (to print symbolic
77 addresses). */
79 void
80 generic_print_address (bfd_vma addr, struct disassemble_info *info)
82 char buf[30];
84 sprintf_vma (buf, addr);
85 (*info->fprintf_func) (info->stream, "0x%s", buf);
88 /* Just return true. */
90 int
91 generic_symbol_at_address (bfd_vma addr ATTRIBUTE_UNUSED,
92 struct disassemble_info *info ATTRIBUTE_UNUSED)
94 return 1;
97 /* Just return TRUE. */
99 bfd_boolean
100 generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED,
101 struct disassemble_info *info ATTRIBUTE_UNUSED)
103 return TRUE;