bfd/cpu-cris.c

   1 /* BFD support for the Axis CRIS architecture.
   2    Copyright 2000, 2002, 2004, 2005, 2007
   3    Free Software Foundation, Inc.
   4    Contributed by Axis Communications AB.
   5    Written by Hans-Peter Nilsson.
   6
   7    This file is part of BFD, the Binary File Descriptor library.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  22    MA 02110-1301, USA.  */
  23
  24 #include "sysdep.h"
  25 #include "bfd.h"
  26 #include "libbfd.h"
  27
  28 /* This routine is provided two arch_infos and returns the lowest common
  29    denominator.  CRIS v0..v10 vs. v32 are not compatible in general, but
  30    there's a compatible subset for which we provide an arch_info.  */
  31
  32 static const bfd_arch_info_type * get_compatible
  33   PARAMS ((const bfd_arch_info_type *, const bfd_arch_info_type *));
  34
  35 static const bfd_arch_info_type *
  36 get_compatible (a,b)
  37      const bfd_arch_info_type *a;
  38      const bfd_arch_info_type *b;
  39 {
  40   /* Arches must match.  */
  41   if (a->arch != b->arch)
  42    return NULL;
  43
  44   /* If either is the compatible mach, return the other.  */
  45   if (a->mach == bfd_mach_cris_v10_v32)
  46     return b;
  47   if (b->mach == bfd_mach_cris_v10_v32)
  48     return a;
  49
  50 #if 0
  51   /* The code below is disabled but kept as a warning.
  52      See ldlang.c:lang_check.  Quite illogically, incompatible arches
  53      (as signalled by this function) are only *warned* about, while with
  54      this function signalling compatible ones, we can have the
  55      cris_elf_merge_private_bfd_data function return an error.  This is
  56      undoubtedly a FIXME: in general.  Also, the
  57      command_line.warn_mismatch flag and the --no-warn-mismatch option
  58      are misnamed for the multitude of ports that signal compatibility:
  59      it is there an error, not a warning.  We work around it by
  60      pretending matching machs here.  */
  61
  62   /* Except for the compatible mach, machs must match.  */
  63   if (a->mach != b->mach)
  64     return NULL;
  65 #endif
  66
  67   return a;
  68 }
  69
  70 #define N(NUMBER, PRINT, NEXT)  \
  71  { 32, 32, 8, bfd_arch_cris, NUMBER, "cris", PRINT, 1, FALSE, \
  72    get_compatible, bfd_default_scan, NEXT }
  73
  74 static const bfd_arch_info_type bfd_cris_arch_compat_v10_v32 =
  75  N (bfd_mach_cris_v10_v32, "cris:common_v10_v32", NULL);
  76
  77 static const bfd_arch_info_type bfd_cris_arch_v32 =
  78  N (bfd_mach_cris_v32, "crisv32", &bfd_cris_arch_compat_v10_v32);
  79
  80 const bfd_arch_info_type bfd_cris_arch =
  81 {
  82   32,                           /* There's 32 bits_per_word.  */
  83   32,                           /* There's 32 bits_per_address.  */
  84   8,                            /* There's 8 bits_per_byte.  */
  85   bfd_arch_cris,                /* One of enum bfd_architecture, defined
  86                                    in archures.c and provided in
  87                                    generated header files.  */
  88   bfd_mach_cris_v0_v10,         /* Random BFD-internal number for this
  89                                    machine, similarly listed in
  90                                    archures.c.  Not emitted in output.  */
  91   "cris",                       /* The arch_name.  */
  92   "cris",                       /* The printable name is the same.  */
  93   1,                            /* Section alignment power; each section
  94                                    is aligned to (only) 2^1 bytes.  */
  95   TRUE,                         /* This is the default "machine".  */
  96   get_compatible,               /* A function for testing
  97                                    "machine" compatibility of two
  98                                    bfd_arch_info_type.  */
  99   bfd_default_scan,             /* Check if a bfd_arch_info_type is a
 100                                    match.  */
 101   &bfd_cris_arch_v32            /* Pointer to next bfd_arch_info_type in
 102                                    the same family.  */
 103 };
 104
 105 /*
 106  * Local variables:
 107  * eval: (c-set-style "gnu")
 108  * indent-tabs-mode: t
 109  * End:
 110  */