bfd/cpu-arm.c

   1 /* BFD support for the ARM processor
   2    Copyright 1994, 95, 1997 Free Software Foundation, Inc.
   3    Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24
  25 static const bfd_arch_info_type *compatible
  26   PARAMS ((const bfd_arch_info_type *, const bfd_arch_info_type *));
  27 static boolean scan PARAMS ((const struct bfd_arch_info *, const char *));
  28
  29 /* This routine is provided two arch_infos and works out which ARM
  30    machine which would be compatible with both and returns a pointer
  31    to its info structure */
  32
  33 static const bfd_arch_info_type *
  34 compatible (a,b)
  35      const bfd_arch_info_type * a;
  36      const bfd_arch_info_type * b;
  37 {
  38   /* If a & b are for different architecture we can do nothing */
  39   if (a->arch != b->arch)
  40       return NULL;
  41
  42   /* If a & b are for the same machine then all is well */
  43   if (a->mach == b->mach)
  44     return a;
  45
  46   /* Otherwise if either a or b is the 'default' machine then
  47      it can be polymorphed into the other */
  48   if (a->the_default)
  49     return b;
  50
  51   if (b->the_default)
  52     return a;
  53
  54   /* So far all newer ARM architecture cores are supersets of previous cores */
  55   if (a->mach < b->mach)
  56     return b;
  57   else if (a->mach > b->mach)
  58     return a;
  59
  60   /* Never reached! */
  61   return NULL;
  62 }
  63
  64 static struct
  65 {
  66   enum bfd_architecture arch;
  67   char *                name;
  68 }
  69 processors[] =
  70 {
  71   { bfd_mach_arm_2,  "arm2"     },
  72   { bfd_mach_arm_2a, "arm250"   },
  73   { bfd_mach_arm_2a, "arm3"     },
  74   { bfd_mach_arm_3,  "arm6"     },
  75   { bfd_mach_arm_3,  "arm60"    },
  76   { bfd_mach_arm_3,  "arm600"   },
  77   { bfd_mach_arm_3,  "arm610"   },
  78   { bfd_mach_arm_3,  "arm7"     },
  79   { bfd_mach_arm_3,  "arm710"   },
  80   { bfd_mach_arm_3,  "arm7500"  },
  81   { bfd_mach_arm_3,  "arm7d"    },
  82   { bfd_mach_arm_3,  "arm7di"   },
  83   { bfd_mach_arm_3M, "arm7dm"   },
  84   { bfd_mach_arm_3M, "arm7dmi"  },
  85   { bfd_mach_arm_4,  "arm8"     },
  86   { bfd_mach_arm_4,  "arm810"   },
  87   { bfd_mach_arm_4,  "sa1"      },
  88   { bfd_mach_arm_4T, "arm7tdmi" }
  89 };
  90
  91 static boolean
  92 scan (info, string)
  93      const struct bfd_arch_info * info;
  94      const char * string;
  95 {
  96   int  i;
  97
  98   /* First test for an exact match */
  99   if (strcasecmp (string, info->printable_name) == 0)
 100     return true;
 101
 102   /* Next check for a processor name instead of an Architecture name */
 103   for (i = sizeof (processors) / sizeof (processors[0]); i--;)
 104     {
 105       if (strcasecmp (string, processors[ i ].name) == 0)
 106         break;
 107     }
 108
 109   if (i != -1 && info->arch == processors[ i ].arch)
 110     return true;
 111
 112   /* Finally check for the default architecture */
 113   if (strcasecmp (string, "arm") == 0)
 114     return info->the_default;
 115
 116   return false;
 117 }
 118
 119
 120 #define N(number, print, default, next)  \
 121 {  32, 32, 8, bfd_arch_arm, number, "arm", print, 4, default, compatible, scan, next }
 122
 123 static const bfd_arch_info_type arch_info_struct[] =
 124 {
 125   N( bfd_mach_arm_2,  "armv2",  false, & arch_info_struct[1] ),
 126   N( bfd_mach_arm_2a, "armv2a", false, & arch_info_struct[2] ),
 127   N( bfd_mach_arm_3,  "armv3",  false, & arch_info_struct[3] ),
 128   N( bfd_mach_arm_3M, "armv3m", false, & arch_info_struct[4] ),
 129   N( bfd_mach_arm_4,  "armv4",  false, & arch_info_struct[5] ),
 130   N( bfd_mach_arm_4T, "armv4t", false, NULL )
 131 };
 132
 133 const bfd_arch_info_type bfd_arm_arch =
 134   N( 0, "arm", true, & arch_info_struct[0] );