bfd/cpu-aarch64.c

   1 /* BFD support for AArch64.
   2    Copyright 2009, 2010, 2011, 2012  Free Software Foundation, Inc.
   3    Contributed by ARM Ltd.
   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 3 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; see the file COPYING3. If not,
  19    see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "sysdep.h"
  22 #include "bfd.h"
  23 #include "libbfd.h"
  24 #include "libiberty.h"
  25
  26 /* This routine is provided two arch_infos and works out which Aarch64
  27    machine which would be compatible with both and returns a pointer
  28    to its info structure.  */
  29
  30 static const bfd_arch_info_type *
  31 compatible (const bfd_arch_info_type * a, const bfd_arch_info_type * b)
  32 {
  33   /* If a & b are for different architecture we can do nothing.  */
  34   if (a->arch != b->arch)
  35     return NULL;
  36
  37   /* If a & b are for the same machine then all is well.  */
  38   if (a->mach == b->mach)
  39     return a;
  40
  41   /* Otherwise if either a or b is the 'default' machine
  42      then it can be polymorphed into the other.  */
  43   if (a->the_default)
  44     return b;
  45
  46   if (b->the_default)
  47     return a;
  48
  49   /* So far all newer cores are
  50      supersets of previous cores.  */
  51   if (a->mach < b->mach)
  52     return b;
  53   else if (a->mach > b->mach)
  54     return a;
  55
  56   /* Never reached!  */
  57   return NULL;
  58 }
  59
  60 static struct
  61 {
  62   unsigned int mach;
  63   char *name;
  64 }
  65 processors[] =
  66 {
  67   /* These two are example CPUs supported in GCC, once we have real
  68      CPUs they will be removed.  */
  69   { bfd_mach_aarch64, "example-1" },
  70   { bfd_mach_aarch64, "example-2" }
  71 };
  72
  73 static bfd_boolean
  74 scan (const struct bfd_arch_info *info, const char *string)
  75 {
  76   int i;
  77
  78   /* First test for an exact match.  */
  79   if (strcasecmp (string, info->printable_name) == 0)
  80     return TRUE;
  81
  82   /* Next check for a processor name instead of an Architecture name.  */
  83   for (i = sizeof (processors) / sizeof (processors[0]); i--;)
  84     {
  85       if (strcasecmp (string, processors[i].name) == 0)
  86         break;
  87     }
  88
  89   if (i != -1 && info->mach == processors[i].mach)
  90     return TRUE;
  91
  92   /* Finally check for the default architecture.  */
  93   if (strcasecmp (string, "aarch64") == 0)
  94     return info->the_default;
  95
  96   return FALSE;
  97 }
  98
  99 #define N(NUMBER, PRINT, DEFAULT, NEXT)                         \
 100   { 64, 64, 8, bfd_arch_aarch64, NUMBER,                        \
 101     "aarch64", PRINT, 4, DEFAULT, compatible, scan,             \
 102     bfd_arch_default_fill, NEXT }
 103
 104 const bfd_arch_info_type bfd_aarch64_arch =
 105   N (0, "aarch64", TRUE, NULL);
 106
 107
 108 bfd_boolean
 109 bfd_is_aarch64_special_symbol_name (const char *name, int type)
 110 {
 111   if (!name || name[0] != '$')
 112     return FALSE;
 113   if (name[1] == 'x' || name[1] == 'd')
 114     type &= BFD_AARCH64_SPECIAL_SYM_TYPE_MAP;
 115   else if (name[1] == 'm' || name[1] == 'f' || name[1] == 'p')
 116     type &= BFD_AARCH64_SPECIAL_SYM_TYPE_TAG;
 117   else
 118     return FALSE;
 119
 120   return (type != 0 && (name[2] == 0 || name[2] == '.'));
 121 }