text: /* Disassemble from a buffer, for GNU.
     Copyright (C) 1993-2017 Free Software Foundation, Inc.
  
     This file is part of the GNU opcodes library.
  
     This library is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3, or (at your option)
     any later version.
  
     It is distributed in the hope that it will be useful, but WITHOUT
     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
     License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
     MA 02110-1301, USA.  */
  
  #include "sysdep.h"
  #include "dis-asm.h"
  #include <errno.h>
  #include "opintl.h"
  
  /* Get LENGTH bytes from info's buffer, at target address memaddr.
     Transfer them to myaddr.  */
  int
  buffer_read_memory (bfd_vma memaddr,
  		    bfd_byte *myaddr,
  		    unsigned int length,
  		    struct disassemble_info *info)
  {
    unsigned int opb = info->octets_per_byte;
    unsigned int end_addr_offset = length / opb;
    unsigned int max_addr_offset = info->buffer_length / opb;
    unsigned int octets = (memaddr - info->buffer_vma) * opb;
  
    if (memaddr < info->buffer_vma
        || memaddr - info->buffer_vma > max_addr_offset
        || memaddr - info->buffer_vma + end_addr_offset > max_addr_offset
        || (info->stop_vma && (memaddr >= info->stop_vma
  			     || memaddr + end_addr_offset > info->stop_vma)))
      /* Out of bounds.  Use EIO because GDB uses it.  */
      return EIO;
    memcpy (myaddr, info->buffer + octets, length);
  
    return 0;
  }
  
  /* Print an error message.  We can assume that this is in response to
     an error return from buffer_read_memory.  */
  
  void
  perror_memory (int status,
  	       bfd_vma memaddr,
  	       struct disassemble_info *info)
  {
    if (status != EIO)
      /* Can't happen.  */
      info->fprintf_func (info->stream, _("Unknown error %d\n"), status);
    else
      {
        char buf[30];
  
        /* Actually, address between memaddr and memaddr + len was
  	 out of bounds.  */
        sprintf_vma (buf, memaddr);
        info->fprintf_func (info->stream,
  			  _("Address 0x%s is out of bounds.\n"), buf);
      }
  }
  
  /* This could be in a separate file, to save miniscule amounts of space
     in statically linked executables.  */
  
  /* Just print the address is hex.  This is included for completeness even
     though both GDB and objdump provide their own (to print symbolic
     addresses).  */
  
  void
  generic_print_address (bfd_vma addr, struct disassemble_info *info)
  {
    char buf[30];
  
    sprintf_vma (buf, addr);
    (*info->fprintf_func) (info->stream, "0x%s", buf);
  }
  
  /* Just return true.  */
  
  int
  generic_symbol_at_address (bfd_vma addr ATTRIBUTE_UNUSED,
  			   struct disassemble_info *info ATTRIBUTE_UNUSED)
  {
    return 1;
  }
  
  /* Just return TRUE.  */
  
  bfd_boolean
  generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED,
  			 struct disassemble_info *info ATTRIBUTE_UNUSED)
  {
    return TRUE;
  }
  