1 /* Disassemble from a buffer, for GNU. 2 Copyright 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005 3 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 18 MA 02110-1301, USA. */ 19 20 #include "sysdep.h" 21 #include "dis-asm.h" 22 #include <errno.h> 23 #include "opintl.h" 24 25 /* Get LENGTH bytes from info's buffer, at target address memaddr. 26 Transfer them to myaddr. */ 27 int 28 buffer_read_memory (bfd_vma memaddr, 29 bfd_byte *myaddr, 30 unsigned int length, 31 struct disassemble_info *info) 32 { 33 unsigned int opb = info->octets_per_byte; 34 unsigned int end_addr_offset = length / opb; 35 unsigned int max_addr_offset = info->buffer_length / opb; 36 unsigned int octets = (memaddr - info->buffer_vma) * opb; 37 38 if (memaddr < info->buffer_vma 39 || memaddr - info->buffer_vma + end_addr_offset > max_addr_offset) 40 /* Out of bounds. Use EIO because GDB uses it. */ 41 return EIO; 42 memcpy (myaddr, info->buffer + octets, length); 43 44 return 0; 45 } 46 47 /* Print an error message. We can assume that this is in response to 48 an error return from buffer_read_memory. */ 49 50 void 51 perror_memory (int status, 52 bfd_vma memaddr, 53 struct disassemble_info *info) 54 { 55 if (status != EIO) 56 /* Can't happen. */ 57 info->fprintf_func (info->stream, _("Unknown error %d\n"), status); 58 else 59 { 60 char buf[30]; 61 62 /* Actually, address between memaddr and memaddr + len was 63 out of bounds. */ 64 sprintf_vma (buf, memaddr); 65 info->fprintf_func (info->stream, 66 _("Address 0x%s is out of bounds.\n"), buf); 67 } 68 } 69 70 /* This could be in a separate file, to save miniscule amounts of space 71 in statically linked executables. */ 72 73 /* Just print the address is hex. This is included for completeness even 74 though both GDB and objdump provide their own (to print symbolic 75 addresses). */ 76 77 void 78 generic_print_address (bfd_vma addr, struct disassemble_info *info) 79 { 80 char buf[30]; 81 82 sprintf_vma (buf, addr); 83 (*info->fprintf_func) (info->stream, "0x%s", buf); 84 } 85 86 /* Just return true. */ 87 88 int 89 generic_symbol_at_address (bfd_vma addr ATTRIBUTE_UNUSED, 90 struct disassemble_info *info ATTRIBUTE_UNUSED) 91 { 92 return 1; 93 } 94 95 /* Just return TRUE. */ 96 97 bfd_boolean 98 generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED, 99 struct disassemble_info *info ATTRIBUTE_UNUSED) 100 { 101 return TRUE; 102 } 103