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.
    4: 
    5:    This file is part of the GNU opcodes library.
    6: 
    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.
   11: 
   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.
   16: 
   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.  */
   21: 
   22: #include "sysdep.h"
   23: #include "dis-asm.h"
   24: #include <errno.h>
   25: #include "opintl.h"
   26: 
   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)
   34: {
   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;
   39: 
   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);
   45: 
   46:   return 0;
   47: }
   48: 
   49: /* Print an error message.  We can assume that this is in response to
   50:    an error return from buffer_read_memory.  */
   51: 
   52: void
   53: perror_memory (int status,
   54:                bfd_vma memaddr,
   55:                struct disassemble_info *info)
   56: {
   57:   if (status != EIO)
   58:     /* Can't happen.  */
   59:     info->fprintf_func (info->stream, _("Unknown error %d\n"), status);
   60:   else
   61:     {
   62:       char buf[30];
   63: 
   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);
   69:     }
   70: }
   71: 
   72: /* This could be in a separate file, to save miniscule amounts of space
   73:    in statically linked executables.  */
   74: 
   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).  */
   78: 
   79: void
   80: generic_print_address (bfd_vma addr, struct disassemble_info *info)
   81: {
   82:   char buf[30];
   83: 
   84:   sprintf_vma (buf, addr);
   85:   (*info->fprintf_func) (info->stream, "0x%s", buf);
   86: }
   87: 
   88: /* Just return true.  */
   89: 
   90: int
   91: generic_symbol_at_address (bfd_vma addr ATTRIBUTE_UNUSED,
   92:                            struct disassemble_info *info ATTRIBUTE_UNUSED)
   93: {
   94:   return 1;
   95: }
   96: 
   97: /* Just return TRUE.  */
   98: 
   99: bfd_boolean
  100: generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED,
  101:                          struct disassemble_info *info ATTRIBUTE_UNUSED)
  102: {
  103:   return TRUE;
  104: }