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. */ 29int 30buffer_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 52void 53perror_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 79void 80generic_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 90int 91generic_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 99bfd_boolean 100generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED, 101 struct disassemble_info *info ATTRIBUTE_UNUSED) 102{ 103 return TRUE; 104} 105