/* Disassemble from a buffer, for GNU. Copyright (C) 1993-2018 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 { char buf[30]; /* Actually, address between memaddr and memaddr + len was out of bounds. */ sprintf_vma (buf, memaddr); info->fprintf_func (info->stream, _("Address 0x%s is out of bounds.\n"), buf); } } /* 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) { char buf[30]; sprintf_vma (buf, addr); (*info->fprintf_func) (info->stream, "0x%s", buf); } /* Just return true. */ int generic_symbol_at_address (bfd_vma addr ATTRIBUTE_UNUSED, struct disassemble_info *info ATTRIBUTE_UNUSED) { return 1; } /* Just return TRUE. */ bfd_boolean generic_symbol_is_valid (asymbol * sym ATTRIBUTE_UNUSED, struct disassemble_info *info ATTRIBUTE_UNUSED) { return TRUE; }