bfd/cpu-aarch64.c

   1 /* BFD support for AArch64.
   2    Copyright (C) 2009-2019 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   /* Don't allow mixing ilp32 with lp64.  */
  42   if ((a->mach & bfd_mach_aarch64_ilp32) != (b->mach & bfd_mach_aarch64_ilp32))
  43     return NULL;
  44
  45   /* Otherwise if either a or b is the 'default' machine
  46      then it can be polymorphed into the other.  */
  47   if (a->the_default)
  48     return b;
  49
  50   if (b->the_default)
  51     return a;
  52
  53   /* So far all newer cores are
  54      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   unsigned int mach;
  67   char *name;
  68 }
  69 processors[] =
  70 {
  71   { bfd_mach_aarch64,     "cortex-a34"      },
  72   { bfd_mach_aarch64,     "cortex-a65"      },
  73   { bfd_mach_aarch64,     "cortex-a65ae"    },
  74   { bfd_mach_aarch64,     "cortex-a76ae"    },
  75   { bfd_mach_aarch64,     "cortex-a77"      }
  76 };
  77
  78 static bfd_boolean
  79 scan (const struct bfd_arch_info *info, const char *string)
  80 {
  81   int i;
  82
  83   /* First test for an exact match.  */
  84   if (strcasecmp (string, info->printable_name) == 0)
  85     return TRUE;
  86
  87   /* Next check for a processor name instead of an Architecture name.  */
  88   for (i = sizeof (processors) / sizeof (processors[0]); i--;)
  89     {
  90       if (strcasecmp (string, processors[i].name) == 0)
  91         break;
  92     }
  93
  94   if (i != -1 && info->mach == processors[i].mach)
  95     return TRUE;
  96
  97   /* Finally check for the default architecture.  */
  98   if (strcasecmp (string, "aarch64") == 0)
  99     return info->the_default;
 100
 101   return FALSE;
 102 }
 103
 104 #define N(NUMBER, PRINT, WORDSIZE, DEFAULT, NEXT)               \
 105   { WORDSIZE, WORDSIZE, 8, bfd_arch_aarch64, NUMBER,            \
 106     "aarch64", PRINT, 4, DEFAULT, compatible, scan,             \
 107       bfd_arch_default_fill, NEXT, 0 }
 108
 109 static const bfd_arch_info_type bfd_aarch64_arch_ilp32 =
 110   N (bfd_mach_aarch64_ilp32, "aarch64:ilp32", 32, FALSE, NULL);
 111
 112 const bfd_arch_info_type bfd_aarch64_arch =
 113   N (0, "aarch64", 64, TRUE, &bfd_aarch64_arch_ilp32);
 114
 115 bfd_boolean
 116 bfd_is_aarch64_special_symbol_name (const char *name, int type)
 117 {
 118   if (!name || name[0] != '$')
 119     return FALSE;
 120   if (name[1] == 'x' || name[1] == 'd')
 121     type &= BFD_AARCH64_SPECIAL_SYM_TYPE_MAP;
 122   else if (name[1] == 'm' || name[1] == 'f' || name[1] == 'p')
 123     type &= BFD_AARCH64_SPECIAL_SYM_TYPE_TAG;
 124   else
 125     return FALSE;
 126
 127   return (type != 0 && (name[2] == 0 || name[2] == '.'));
 128 }