bfd/cpu-cris.c

   1 /* BFD support for the Axis CRIS architecture.
   2    Copyright (C) 2000-2016 Free Software Foundation, Inc.
   3    Contributed by Axis Communications AB.
   4    Written by Hans-Peter Nilsson.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include "bfd.h"
  25 #include "libbfd.h"
  26
  27 /* This routine is provided two arch_infos and returns the lowest common
  28    denominator.  CRIS v0..v10 vs. v32 are not compatible in general, but
  29    there's a compatible subset for which we provide an arch_info.  */
  30
  31 static const bfd_arch_info_type * get_compatible
  32   (const bfd_arch_info_type *, const bfd_arch_info_type *);
  33
  34 static const bfd_arch_info_type *
  35 get_compatible (const bfd_arch_info_type *a,
  36                 const bfd_arch_info_type *b)
  37 {
  38   /* Arches must match.  */
  39   if (a->arch != b->arch)
  40    return NULL;
  41
  42   /* If either is the compatible mach, return the other.  */
  43   if (a->mach == bfd_mach_cris_v10_v32)
  44     return b;
  45   if (b->mach == bfd_mach_cris_v10_v32)
  46     return a;
  47
  48 #if 0
  49   /* The code below is disabled but kept as a warning.
  50      See ldlang.c:lang_check.  Quite illogically, incompatible arches
  51      (as signalled by this function) are only *warned* about, while with
  52      this function signalling compatible ones, we can have the
  53      cris_elf_merge_private_bfd_data function return an error.  This is
  54      undoubtedly a FIXME: in general.  Also, the
  55      command_line.warn_mismatch flag and the --no-warn-mismatch option
  56      are misnamed for the multitude of ports that signal compatibility:
  57      it is there an error, not a warning.  We work around it by
  58      pretending matching machs here.  */
  59
  60   /* Except for the compatible mach, machs must match.  */
  61   if (a->mach != b->mach)
  62     return NULL;
  63 #endif
  64
  65   return a;
  66 }
  67
  68 #define N(NUMBER, PRINT, NEXT)  \
  69  { 32, 32, 8, bfd_arch_cris, NUMBER, "cris", PRINT, 1, FALSE, \
  70    get_compatible, bfd_default_scan, bfd_arch_default_fill, NEXT }
  71
  72 static const bfd_arch_info_type bfd_cris_arch_compat_v10_v32 =
  73  N (bfd_mach_cris_v10_v32, "cris:common_v10_v32", NULL);
  74
  75 static const bfd_arch_info_type bfd_cris_arch_v32 =
  76  N (bfd_mach_cris_v32, "crisv32", &bfd_cris_arch_compat_v10_v32);
  77
  78 const bfd_arch_info_type bfd_cris_arch =
  79 {
  80   32,                           /* There's 32 bits_per_word.  */
  81   32,                           /* There's 32 bits_per_address.  */
  82   8,                            /* There's 8 bits_per_byte.  */
  83   bfd_arch_cris,                /* One of enum bfd_architecture, defined
  84                                    in archures.c and provided in
  85                                    generated header files.  */
  86   bfd_mach_cris_v0_v10,         /* Random BFD-internal number for this
  87                                    machine, similarly listed in
  88                                    archures.c.  Not emitted in output.  */
  89   "cris",                       /* The arch_name.  */
  90   "cris",                       /* The printable name is the same.  */
  91   1,                            /* Section alignment power; each section
  92                                    is aligned to (only) 2^1 bytes.  */
  93   TRUE,                         /* This is the default "machine".  */
  94   get_compatible,               /* A function for testing
  95                                    "machine" compatibility of two
  96                                    bfd_arch_info_type.  */
  97   bfd_default_scan,             /* Check if a bfd_arch_info_type is a
  98                                    match.  */
  99   bfd_arch_default_fill,        /* Default fill.  */
 100   &bfd_cris_arch_v32            /* Pointer to next bfd_arch_info_type in
 101                                    the same family.  */
 102 };
 103
 104 /*
 105  * Local variables:
 106  * eval: (c-set-style "gnu")
 107  * indent-tabs-mode: t
 108  * End:
 109  */