dis-buf.c

   1 /* Disassemble from a buffer, for GNU.
   2    Copyright (C) 1993, 1994 Free Software Foundation, Inc.
   3
   4 This program is free software; you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation; either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 #include "dis-asm.h"
  19 #include <errno.h>
  20
  21 /* Get LENGTH bytes from info's buffer, at target address memaddr.
  22    Transfer them to myaddr.  */
  23 int
  24 buffer_read_memory (memaddr, myaddr, length, info)
  25      bfd_vma memaddr;
  26      bfd_byte *myaddr;
  27      int length;
  28      struct disassemble_info *info;
  29 {
  30   if (memaddr < info->buffer_vma
  31       || memaddr + length > info->buffer_vma + info->buffer_length)
  32     /* Out of bounds.  Use EIO because GDB uses it.  */
  33     return EIO;
  34   memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length);
  35   return 0;
  36 }
  37
  38 /* Print an error message.  We can assume that this is in response to
  39    an error return from buffer_read_memory.  */
  40 void
  41 perror_memory (status, memaddr, info)
  42      int status;
  43      bfd_vma memaddr;
  44      struct disassemble_info *info;
  45 {
  46   if (status != EIO)
  47     /* Can't happen.  */
  48     (*info->fprintf_func) (info->stream, "Unknown error %d\n", status);
  49   else
  50     /* Actually, address between memaddr and memaddr + len was
  51        out of bounds.  */
  52     (*info->fprintf_func) (info->stream,
  53                            "Address 0x%x is out of bounds.\n", memaddr);
  54 }
  55
  56 /* This could be in a separate file, to save miniscule amounts of space
  57    in statically linked executables.  */
  58
  59 /* Just print the address is hex.  This is included for completeness even
  60    though both GDB and objdump provide their own (to print symbolic
  61    addresses).  */
  62
  63 void
  64 generic_print_address (addr, info)
  65      bfd_vma addr;
  66      struct disassemble_info *info;
  67 {
  68   (*info->fprintf_func) (info->stream, "0x%x", addr);
  69 }
  70
  71 /* Just return the given address.  */
  72
  73 int
  74 generic_symbol_at_address (addr, info)
  75      bfd_vma addr;
  76      struct disassemble_info * info;
  77 {
  78   return 1;
  79 }