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/* BFD library support routines for the AVR architecture.
Copyright (C) 1999-2021 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
/* 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 (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;
if (a->mach == b->mach)
return a;
/* avr-6 is compatible only with itself as its call convention is not
compatible with other avr (the mcu saves the return address on 3 bytes
instead of 2). */
if (a->mach == bfd_mach_avr6 || b->mach == bfd_mach_avr6)
return NULL;
if (a->mach < bfd_mach_avr6 && b->mach < bfd_mach_avr6)
{
/* 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;
if (a->mach <= b->mach)
return b;
if (a->mach >= b->mach)
return a;
}
if (a->mach == bfd_mach_avr2 && b->mach == bfd_mach_avr25)
return a;
if (a->mach == bfd_mach_avr25 && b->mach == bfd_mach_avr2)
return b;
if (a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr31)
return a;
if (a->mach == bfd_mach_avr31 && b->mach == bfd_mach_avr3)
return b;
if (a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr35)
return a;
if (a->mach == bfd_mach_avr35 && b->mach == bfd_mach_avr3)
return b;
if (a->mach == bfd_mach_avr5 && b->mach == bfd_mach_avr51)
return a;
if (a->mach == bfd_mach_avr51 && b->mach == bfd_mach_avr5)
return b;
return NULL;
}
#define N(addr_bits, machine, print, default, next) \
{ \
8, /* Bits in a word. */ \
addr_bits, /* Bits in an address. */ \
8, /* Bits in a byte. */ \
bfd_arch_avr, \
machine, /* Machine number. */ \
"avr", /* Architecture name. */ \
print, /* Printable name. */ \
1, /* Section align power. */ \
default, /* Is this the default ? */ \
compatible, \
bfd_default_scan, \
bfd_arch_default_fill, \
next, \
0 /* Maximum offset of a reloc from the start of an insn. */ \
}
static const bfd_arch_info_type arch_info_struct[] =
{
/* Assembler only. */
N (16, bfd_mach_avr1, "avr:1", FALSE, & arch_info_struct[1]),
/* Classic, <= 8K. */
N (16, bfd_mach_avr2, "avr:2", FALSE, & arch_info_struct[2]),
/* Classic + MOVW, <= 8K. */
N (16, bfd_mach_avr25, "avr:25", FALSE, & arch_info_struct[3]),
/* Classic, > 8K, <= 64K. */
/* TODO: addr_bits should be 16, but set to 22 for some following
version of GCC (from 4.3) for backward compatibility. */
N (22, bfd_mach_avr3, "avr:3", FALSE, & arch_info_struct[4]),
/* Classic, == 128K. */
N (22, bfd_mach_avr31, "avr:31", FALSE, & arch_info_struct[5]),
/* Classic + MOVW + JMP/CALL, > 8K, <= 64K. */
N (16, bfd_mach_avr35, "avr:35", FALSE, & arch_info_struct[6]),
/* Enhanced, <= 8K. */
N (16, bfd_mach_avr4, "avr:4", FALSE, & arch_info_struct[7]),
/* Enhanced, > 8K, <= 64K. */
/* TODO: addr_bits should be 16, but set to 22 for some following
version of GCC (from 4.3) for backward compatibility. */
N (22, bfd_mach_avr5, "avr:5", FALSE, & arch_info_struct[8]),
/* Enhanced, == 128K. */
N (22, bfd_mach_avr51, "avr:51", FALSE, & arch_info_struct[9]),
/* 3-Byte PC. */
N (22, bfd_mach_avr6, "avr:6", FALSE, & arch_info_struct[10]),
/* Tiny core (AVR Tiny). */
N (16, bfd_mach_avrtiny, "avr:100", FALSE, & arch_info_struct[11]),
/* Xmega 1. */
N (24, bfd_mach_avrxmega1, "avr:101", FALSE, & arch_info_struct[12]),
/* Xmega 2. */
N (24, bfd_mach_avrxmega2, "avr:102", FALSE, & arch_info_struct[13]),
/* Xmega 3. */
N (24, bfd_mach_avrxmega3, "avr:103", FALSE, & arch_info_struct[14]),
/* Xmega 4. */
N (24, bfd_mach_avrxmega4, "avr:104", FALSE, & arch_info_struct[15]),
/* Xmega 5. */
N (24, bfd_mach_avrxmega5, "avr:105", FALSE, & arch_info_struct[16]),
/* Xmega 6. */
N (24, bfd_mach_avrxmega6, "avr:106", FALSE, & arch_info_struct[17]),
/* Xmega 7. */
N (24, bfd_mach_avrxmega7, "avr:107", FALSE, NULL)
};
const bfd_arch_info_type bfd_avr_arch =
N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]);
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