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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [opcodes/] [dis-buf.c] - Blame information for rev 18

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1 18 khays
/* Disassemble from a buffer, for GNU.
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   Copyright 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005,
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   2007, 2009, 2010  Free Software Foundation, Inc.
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   This file is part of the GNU opcodes library.
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   This library is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3, or (at your option)
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   any later version.
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   It is distributed in the hope that it will be useful, but WITHOUT
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   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
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   License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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#include "sysdep.h"
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#include "dis-asm.h"
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#include <errno.h>
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#include "opintl.h"
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/* Get LENGTH bytes from info's buffer, at target address memaddr.
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   Transfer them to myaddr.  */
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int
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buffer_read_memory (bfd_vma memaddr,
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                    bfd_byte *myaddr,
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                    unsigned int length,
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                    struct disassemble_info *info)
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{
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  unsigned int opb = info->octets_per_byte;
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  unsigned int end_addr_offset = length / opb;
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  unsigned int max_addr_offset = info->buffer_length / opb;
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  unsigned int octets = (memaddr - info->buffer_vma) * opb;
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  if (memaddr < info->buffer_vma
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      || memaddr - info->buffer_vma > max_addr_offset
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      || memaddr - info->buffer_vma + end_addr_offset > max_addr_offset)
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    /* Out of bounds.  Use EIO because GDB uses it.  */
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    return EIO;
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  memcpy (myaddr, info->buffer + octets, length);
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  return 0;
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}
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/* Print an error message.  We can assume that this is in response to
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   an error return from buffer_read_memory.  */
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void
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perror_memory (int status,
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               bfd_vma memaddr,
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               struct disassemble_info *info)
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{
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  if (status != EIO)
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    /* Can't happen.  */
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    info->fprintf_func (info->stream, _("Unknown error %d\n"), status);
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  else
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    {
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      char buf[30];
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      /* Actually, address between memaddr and memaddr + len was
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         out of bounds.  */
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      sprintf_vma (buf, memaddr);
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      info->fprintf_func (info->stream,
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                          _("Address 0x%s is out of bounds.\n"), buf);
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    }
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}
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/* This could be in a separate file, to save miniscule amounts of space
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   in statically linked executables.  */
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/* Just print the address is hex.  This is included for completeness even
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   though both GDB and objdump provide their own (to print symbolic
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   addresses).  */
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void
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generic_print_address (bfd_vma addr, struct disassemble_info *info)
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{
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  char buf[30];
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  sprintf_vma (buf, addr);
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  (*info->fprintf_func) (info->stream, "0x%s", buf);
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}
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/* Just return true.  */
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int
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generic_symbol_at_address (bfd_vma addr ATTRIBUTE_UNUSED,
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                           struct disassemble_info *info ATTRIBUTE_UNUSED)
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{
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  return 1;
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}
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/* Just return TRUE.  */
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bfd_boolean
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generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED,
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                         struct disassemble_info *info ATTRIBUTE_UNUSED)
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{
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  return TRUE;
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}

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