1 /* Disassemble from a buffer, for GNU. 2 Copyright 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005, 3 2007, 2009, 2010 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 > max_addr_offset 42 || memaddr - info->buffer_vma + end_addr_offset > max_addr_offset) 43 /* Out of bounds. Use EIO because GDB uses it. */ 44 return EIO; 45 memcpy (myaddr, info->buffer + octets, length); 46 47 return 0; 48 } 49 50 /* Print an error message. We can assume that this is in response to 51 an error return from buffer_read_memory. */ 52 53 void 54 perror_memory (int status, 55 bfd_vma memaddr, 56 struct disassemble_info *info) 57 { 58 if (status != EIO) 59 /* Can't happen. */ 60 info->fprintf_func (info->stream, _("Unknown error %d\n"), status); 61 else 62 { 63 char buf[30]; 64 65 /* Actually, address between memaddr and memaddr + len was 66 out of bounds. */ 67 sprintf_vma (buf, memaddr); 68 info->fprintf_func (info->stream, 69 _("Address 0x%s is out of bounds.\n"), buf); 70 } 71 } 72 73 /* This could be in a separate file, to save miniscule amounts of space 74 in statically linked executables. */ 75 76 /* Just print the address is hex. This is included for completeness even 77 though both GDB and objdump provide their own (to print symbolic 78 addresses). */ 79 80 void 81 generic_print_address (bfd_vma addr, struct disassemble_info *info) 82 { 83 char buf[30]; 84 85 sprintf_vma (buf, addr); 86 (*info->fprintf_func) (info->stream, "0x%s", buf); 87 } 88 89 /* Just return true. */ 90 91 int 92 generic_symbol_at_address (bfd_vma addr ATTRIBUTE_UNUSED, 93 struct disassemble_info *info ATTRIBUTE_UNUSED) 94 { 95 return 1; 96 } 97 98 /* Just return TRUE. */ 99 100 bfd_boolean 101 generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED, 102 struct disassemble_info *info ATTRIBUTE_UNUSED) 103 { 104 return TRUE; 105 } 106