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/* Disassemble from a buffer, for GNU.
Copyright (C) 1993-2020 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;
}
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