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[/] [openrisc/] [trunk/] [gnu-stable/] [binutils-2.20.1/] [bfd/] [cpu-avr.c] - Blame information for rev 818

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1 205 julius
/* BFD library support routines for the AVR architecture.
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   Copyright 1999, 2000, 2002, 2005, 2006, 2007, 2008
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   Free Software Foundation, Inc.
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   Contributed by Denis Chertykov <denisc@overta.ru>
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   This file is part of BFD, the Binary File Descriptor library.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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/* This routine is provided two arch_infos and works out which AVR
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   machine which would be compatible with both and returns a pointer
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   to its info structure.  */
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static const bfd_arch_info_type *
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compatible (const bfd_arch_info_type * a,
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            const bfd_arch_info_type * b)
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{
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  /* If a & b are for different architectures we can do nothing.  */
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  if (a->arch != b->arch)
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    return NULL;
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  if (a->mach == b->mach)
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    return a;
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  /* avr-6 is compatible only with itself as its call convention is not
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     compatible with other avr (the mcu saves the return address on 3 bytes
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     instead of 2).  */
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  if (a->mach == bfd_mach_avr6 || b->mach == bfd_mach_avr6)
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    return NULL;
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  if (a->mach < bfd_mach_avr6 && b->mach < bfd_mach_avr6)
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    {
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      /* Special case for ATmega[16]03 (avr:3) and ATmega83 (avr:4).  */
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      if ((a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr4)
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         || (a->mach == bfd_mach_avr4 && b->mach == bfd_mach_avr3))
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       return NULL;
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      if (a->mach <= b->mach)
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       return b;
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      if (a->mach >= b->mach)
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       return a;
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    }
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  if (a->mach == bfd_mach_avr2 && b->mach == bfd_mach_avr25)
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    return a;
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  if (a->mach == bfd_mach_avr25 && b->mach == bfd_mach_avr2)
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    return b;
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  if (a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr31)
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    return a;
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  if (a->mach == bfd_mach_avr31 && b->mach == bfd_mach_avr3)
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    return b;
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  if (a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr35)
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    return a;
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  if (a->mach == bfd_mach_avr35 && b->mach == bfd_mach_avr3)
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    return b;
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  if (a->mach == bfd_mach_avr5 && b->mach == bfd_mach_avr51)
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    return a;
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  if (a->mach == bfd_mach_avr51 && b->mach == bfd_mach_avr5)
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    return b;
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  return NULL;
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}
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#define N(addr_bits, machine, print, default, next)             \
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{                                                               \
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  8,                            /* 8 bits in a word.  */        \
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  addr_bits,                    /* bits in an address.  */      \
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  8,                            /* 8 bits in a byte.  */        \
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  bfd_arch_avr,                                                 \
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  machine,                      /* Machine number.  */          \
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  "avr",                        /* Architecture name.   */      \
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  print,                        /* Printable name.  */          \
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  1,                            /* Section align power.  */     \
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  default,                      /* Is this the default ?  */    \
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  compatible,                                                   \
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  bfd_default_scan,                                             \
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  next                                                          \
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}
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static const bfd_arch_info_type arch_info_struct[] =
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{
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  /* Assembler only.  */
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  N (16, bfd_mach_avr1, "avr:1", FALSE, & arch_info_struct[1]),
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  /* Classic, <= 8K.  */
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  N (16, bfd_mach_avr2, "avr:2", FALSE, & arch_info_struct[2]),
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  /* Classic + MOVW, <= 8K.  */
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  N (16, bfd_mach_avr25, "avr:25", FALSE, & arch_info_struct[3]),
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  /* Classic, > 8K, <= 64K.  */
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  /* TODO:  addr_bits should be 16, but set to 22 for some following
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     version of GCC (from 4.3) for backward compatibility.  */
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  N (22, bfd_mach_avr3, "avr:3", FALSE, & arch_info_struct[4]),
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  /* Classic, == 128K.  */
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  N (22, bfd_mach_avr31, "avr:31", FALSE, & arch_info_struct[5]),
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  /* Classic + MOVW + JMP/CALL, > 8K, <= 64K. */
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  N (16, bfd_mach_avr35, "avr:35", FALSE, & arch_info_struct[6]),
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  /* Enhanced, <= 8K.  */
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  N (16, bfd_mach_avr4, "avr:4", FALSE, & arch_info_struct[7]),
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  /* Enhanced, > 8K, <= 64K.  */
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  /* TODO:  addr_bits should be 16, but set to 22 for some following
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     version of GCC (from 4.3) for backward compatibility.  */
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  N (22, bfd_mach_avr5, "avr:5", FALSE, & arch_info_struct[8]),
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  /* Enhanced, == 128K.  */
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  N (22, bfd_mach_avr51, "avr:51", FALSE, & arch_info_struct[9]),
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  /* 3-Byte PC.  */
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  N (22, bfd_mach_avr6, "avr:6", FALSE, NULL)
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};
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const bfd_arch_info_type bfd_avr_arch =
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  N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]);

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