| /* Disassemble from a buffer, for GNU. |
| Copyright (C) 1993-2024 Free Software Foundation, Inc. |
| |
| This file is part of the GNU opcodes library. |
| |
| This library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| It is distributed in the hope that it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #include "sysdep.h" |
| #include "dis-asm.h" |
| #include <errno.h> |
| #include "opintl.h" |
| |
| /* Get LENGTH bytes from info's buffer, at target address memaddr. |
| Transfer them to myaddr. */ |
| int |
| buffer_read_memory (bfd_vma memaddr, |
| bfd_byte *myaddr, |
| unsigned int length, |
| struct disassemble_info *info) |
| { |
| unsigned int opb = info->octets_per_byte; |
| size_t end_addr_offset = length / opb; |
| size_t max_addr_offset = info->buffer_length / opb; |
| size_t octets = (memaddr - info->buffer_vma) * opb; |
| |
| if (memaddr < info->buffer_vma |
| || memaddr - info->buffer_vma > max_addr_offset |
| || memaddr - info->buffer_vma + end_addr_offset > max_addr_offset |
| || (info->stop_vma && (memaddr >= info->stop_vma |
| || memaddr + end_addr_offset > info->stop_vma))) |
| /* Out of bounds. Use EIO because GDB uses it. */ |
| return EIO; |
| memcpy (myaddr, info->buffer + octets, length); |
| |
| return 0; |
| } |
| |
| /* Print an error message. We can assume that this is in response to |
| an error return from buffer_read_memory. */ |
| |
| void |
| perror_memory (int status, |
| bfd_vma memaddr, |
| struct disassemble_info *info) |
| { |
| if (status != EIO) |
| /* Can't happen. */ |
| info->fprintf_func (info->stream, _("Unknown error %d\n"), status); |
| else |
| { |
| /* Actually, address between memaddr and memaddr + len was |
| out of bounds. */ |
| info->fprintf_func (info->stream, |
| _("Address 0x%" PRIx64 " is out of bounds.\n"), |
| (uint64_t) memaddr); |
| } |
| } |
| |
| /* This could be in a separate file, to save miniscule amounts of space |
| in statically linked executables. */ |
| |
| /* Just print the address is hex. This is included for completeness even |
| though both GDB and objdump provide their own (to print symbolic |
| addresses). */ |
| |
| void |
| generic_print_address (bfd_vma addr, struct disassemble_info *info) |
| { |
| (*info->fprintf_func) (info->stream, "0x%08" PRIx64, (uint64_t) addr); |
| } |
| |
| /* Just return NULL. */ |
| |
| asymbol * |
| generic_symbol_at_address (bfd_vma addr ATTRIBUTE_UNUSED, |
| struct disassemble_info *info ATTRIBUTE_UNUSED) |
| { |
| return NULL; |
| } |
| |
| /* Just return TRUE. */ |
| |
| bool |
| generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED, |
| struct disassemble_info *info ATTRIBUTE_UNUSED) |
| { |
| return true; |
| } |