opcodes/dis-buf.c

   1 /* Disassemble from a buffer, for GNU.
   2    Copyright (C) 1993, 1994, 1998, 1999 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 "sysdep.h"
  19 #include "dis-asm.h"
  20 #include <errno.h>
  21 #include "opintl.h"
  22
  23 /* Get LENGTH bytes from info's buffer, at target address memaddr.
  24    Transfer them to myaddr.  */
  25 int
  26 buffer_read_memory (memaddr, myaddr, length, info)
  27      bfd_vma memaddr;
  28      bfd_byte *myaddr;
  29      int length;
  30      struct disassemble_info *info;
  31 {
  32   if (memaddr < info->buffer_vma
  33       || memaddr - info->buffer_vma + length > info->buffer_length)
  34     /* Out of bounds.  Use EIO because GDB uses it.  */
  35     return EIO;
  36   memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length);
  37   return 0;
  38 }
  39
  40 /* Print an error message.  We can assume that this is in response to
  41    an error return from buffer_read_memory.  */
  42 void
  43 perror_memory (status, memaddr, info)
  44      int status;
  45      bfd_vma memaddr;
  46      struct disassemble_info *info;
  47 {
  48   if (status != EIO)
  49     /* Can't happen.  */
  50     info->fprintf_func (info->stream, _("Unknown error %d\n"), status);
  51   else
  52     /* Actually, address between memaddr and memaddr + len was
  53        out of bounds.  */
  54     info->fprintf_func (info->stream,
  55                         _("Address 0x%x is out of bounds.\n"), memaddr);
  56 }
  57
  58 /* This could be in a separate file, to save miniscule amounts of space
  59    in statically linked executables.  */
  60
  61 /* Just print the address is hex.  This is included for completeness even
  62    though both GDB and objdump provide their own (to print symbolic
  63    addresses).  */
  64
  65 void
  66 generic_print_address (addr, info)
  67      bfd_vma addr;
  68      struct disassemble_info *info;
  69 {
  70   char buf[30];
  71
  72   sprintf_vma (buf, addr);
  73   (*info->fprintf_func) (info->stream, "0x%s", buf);
  74 }
  75
  76 /* Just concatenate the address as hex.  This is included for
  77    completeness even though both GDB and objdump provide their own (to
  78    print symbolic addresses).  */
  79
  80 void
  81 generic_strcat_address (addr, buf, len)
  82      bfd_vma addr;
  83      char *buf;
  84      int len;
  85 {
  86   if (buf != (char *)NULL && len > 0)
  87     {
  88       char tmpBuf[30];
  89
  90       sprintf_vma (tmpBuf, addr);
  91       if ((strlen (buf) + strlen (tmpBuf)) <= (unsigned int) len)
  92         strcat (buf, tmpBuf);
  93       else
  94         strncat (buf, tmpBuf, (len - strlen(buf)));
  95     }
  96   return;
  97 }
  98
  99 /* Just return the given address.  */
 100
 101 int
 102 generic_symbol_at_address (addr, info)
 103      bfd_vma addr ATTRIBUTE_UNUSED;
 104      struct disassemble_info *info ATTRIBUTE_UNUSED;
 105 {
 106   return 1;
 107 }