1 /* Disassemble from a buffer, for GNU.
2 Copyright (C) 1993-2015 Free Software Foundation, Inc.
4 This file is part of the GNU opcodes library.
6 This library is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 It is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
26 /* Get LENGTH bytes from info's buffer, at target address memaddr.
27 Transfer them to myaddr. */
29 buffer_read_memory (bfd_vma memaddr,
32 struct disassemble_info *info)
34 unsigned int opb = info->octets_per_byte;
35 unsigned int end_addr_offset = length / opb;
36 unsigned int max_addr_offset = info->buffer_length / opb;
37 unsigned int octets = (memaddr - info->buffer_vma) * opb;
39 if (memaddr < info->buffer_vma
40 || memaddr - info->buffer_vma > max_addr_offset
41 || memaddr - info->buffer_vma + end_addr_offset > max_addr_offset)
42 /* Out of bounds. Use EIO because GDB uses it. */
44 memcpy (myaddr, info->buffer + octets, length);
49 /* Print an error message. We can assume that this is in response to
50 an error return from buffer_read_memory. */
53 perror_memory (int status,
55 struct disassemble_info *info)
59 info->fprintf_func (info->stream, _("Unknown error %d\n"), status);
64 /* Actually, address between memaddr and memaddr + len was
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
80 generic_print_address (bfd_vma addr, struct disassemble_info *info)
84 sprintf_vma (buf, addr);
85 (*info->fprintf_func) (info->stream, "0x%s", buf);
88 /* Just return true. */
91 generic_symbol_at_address (bfd_vma addr ATTRIBUTE_UNUSED,
92 struct disassemble_info *info ATTRIBUTE_UNUSED)
97 /* Just return TRUE. */
100 generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED,
101 struct disassemble_info *info ATTRIBUTE_UNUSED)