cpu-avr.c
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/* BFD library support routines for the AVR architecture.
Copyright 1999, 2000, 2002 Free Software Foundation, Inc.
Contributed by Denis Chertykov <denisc@overta.ru>
This file is part of BFD, the Binary File Descriptor library.
This program 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 2 of the License, or
(at your option) any later version.
This program 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
static const bfd_arch_info_type *compatible
PARAMS ((const bfd_arch_info_type *, const bfd_arch_info_type *));
#define N(addr_bits, machine, print, default, next) \
{ \
8, /* 8 bits in a word */ \
addr_bits, /* bits in an address */ \
8, /* 8 bits in a byte */ \
bfd_arch_avr, \
machine, /* machine */ \
"avr", /* arch_name */ \
print, /* printable name */ \
1, /* section align power */ \
default, /* the default machine */ \
compatible, \
bfd_default_scan, \
next \
}
static const bfd_arch_info_type arch_info_struct[] =
{
/* AT90S1200, ATtiny1x, ATtiny28 */
N (16, bfd_mach_avr1, "avr:1", FALSE, & arch_info_struct[1]),
/* AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22 */
N (16, bfd_mach_avr2, "avr:2", FALSE, & arch_info_struct[2]),
/* ATmega103, ATmega603 */
N (22, bfd_mach_avr3, "avr:3", FALSE, & arch_info_struct[3]),
/* ATmega83, ATmega85 */
N (16, bfd_mach_avr4, "avr:4", FALSE, & arch_info_struct[4]),
/* ATmega161, ATmega163, ATmega32, AT94K */
N (22, bfd_mach_avr5, "avr:5", FALSE, NULL)
};
const bfd_arch_info_type bfd_avr_arch =
N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]);
/* This routine is provided two arch_infos and works out which AVR
machine which would be compatible with both and returns a pointer
to its info structure. */
static const bfd_arch_info_type *
compatible (a,b)
const bfd_arch_info_type * a;
const bfd_arch_info_type * b;
{
/* If a & b are for different architectures we can do nothing. */
if (a->arch != b->arch)
return NULL;
/* Special case for ATmega[16]03 (avr:3) and ATmega83 (avr:4). */
if ((a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr4)
|| (a->mach == bfd_mach_avr4 && b->mach == bfd_mach_avr3))
return NULL;
/* So far all newer AVR architecture cores are supersets of previous
cores. */
if (a->mach <= b->mach)
return b;
if (a->mach >= b->mach)
return a;
/* Never reached! */
return NULL;
}