bfd/cpu-powerpc.c

   1 /* BFD PowerPC CPU definition
   2    Copyright (C) 1994-2021 Free Software Foundation, Inc.
   3    Contributed by Ian Lance Taylor, Cygnus Support.
   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; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "libbfd.h"
  25
  26 /* The common PowerPC architecture is compatible with the RS/6000.  */
  27
  28 static const bfd_arch_info_type *
  29 powerpc_compatible (const bfd_arch_info_type *a,
  30                     const bfd_arch_info_type *b)
  31 {
  32   BFD_ASSERT (a->arch == bfd_arch_powerpc);
  33   switch (b->arch)
  34     {
  35     default:
  36       return NULL;
  37     case bfd_arch_powerpc:
  38       if (a->mach == bfd_mach_ppc_vle && b->bits_per_word == 32)
  39         return a;
  40       if (b->mach == bfd_mach_ppc_vle && a->bits_per_word == 32)
  41         return b;
  42       return bfd_default_compatible (a, b);
  43     case bfd_arch_rs6000:
  44       if (b->mach == bfd_mach_rs6k)
  45         return a;
  46       return NULL;
  47     }
  48   /*NOTREACHED*/
  49 }
  50
  51 /* Return a COUNT sized buffer filled with nops (if CODE is TRUE) or
  52    zeros (if CODE is FALSE).  This is the fill used between input
  53    sections for alignment.  It won't normally be executed.   */
  54
  55 static void *
  56 bfd_arch_ppc_nop_fill (bfd_size_type count,
  57                        bool is_bigendian,
  58                        bool code)
  59 {
  60   bfd_byte *fill;
  61
  62   if (count == 0)
  63     return NULL;
  64   fill = bfd_malloc (count);
  65   if (fill == NULL)
  66     return fill;
  67
  68   if (code && (count & 3) == 0)
  69     {
  70       static const char nop_be[4] = {0x60, 0, 0, 0};
  71       static const char nop_le[4] = {0, 0, 0, 0x60};
  72       const char *nop = is_bigendian ? nop_be : nop_le;
  73       bfd_byte *p = fill;
  74
  75       while (count != 0)
  76         {
  77           memcpy (p, nop, 4);
  78           p += 4;
  79           count -= 4;
  80         }
  81     }
  82   else
  83     memset (fill, 0, count);
  84
  85   return fill;
  86 }
  87
  88 #define N(BITS, NUMBER, PRINT, DEFAULT, NEXT)           \
  89   {                                                     \
  90     BITS,      /* Bits in a word.  */                   \
  91     BITS,      /* Bits in an address.  */               \
  92     8,         /* Bits in a byte.  */                   \
  93     bfd_arch_powerpc,                                   \
  94     NUMBER,                                             \
  95     "powerpc",                                          \
  96     PRINT,                                              \
  97     3,          /* Section alignment power.  */         \
  98     DEFAULT,                                            \
  99     powerpc_compatible,                                 \
 100     bfd_default_scan,                                   \
 101     bfd_arch_ppc_nop_fill,                              \
 102     NEXT,                                               \
 103     0 /* Maximum offset of a reloc from the start of an insn.  */ \
 104   }
 105
 106 const bfd_arch_info_type bfd_powerpc_archs[] =
 107 {
 108 #if BFD_DEFAULT_TARGET_SIZE == 64
 109   /* Default for 64 bit target.  */
 110   N (64, bfd_mach_ppc64, "powerpc:common64", true, bfd_powerpc_archs + 1),
 111   /* elf32-ppc:ppc_elf_object_p relies on the default 32 bit arch
 112      being immediately after the 64 bit default.  */
 113   N (32, bfd_mach_ppc, "powerpc:common", false, bfd_powerpc_archs + 2),
 114 #else
 115   /* Default arch must come first.  */
 116   N (32, bfd_mach_ppc, "powerpc:common", true, bfd_powerpc_archs + 1),
 117   /* elf64-ppc:ppc64_elf_object_p relies on the default 64 bit arch
 118      being immediately after the 32 bit default.  */
 119   N (64, bfd_mach_ppc64, "powerpc:common64", false, bfd_powerpc_archs + 2),
 120 #endif
 121   N (32, bfd_mach_ppc_603,      "powerpc:603",     false, bfd_powerpc_archs + 3),
 122   N (32, bfd_mach_ppc_ec603e,   "powerpc:EC603e",  false, bfd_powerpc_archs + 4),
 123   N (32, bfd_mach_ppc_604,      "powerpc:604",     false, bfd_powerpc_archs + 5),
 124   N (32, bfd_mach_ppc_403,      "powerpc:403",     false, bfd_powerpc_archs + 6),
 125   N (32, bfd_mach_ppc_601,      "powerpc:601",     false, bfd_powerpc_archs + 7),
 126   N (64, bfd_mach_ppc_620,      "powerpc:620",     false, bfd_powerpc_archs + 8),
 127   N (64, bfd_mach_ppc_630,      "powerpc:630",     false, bfd_powerpc_archs + 9),
 128   N (64, bfd_mach_ppc_a35,      "powerpc:a35",     false, bfd_powerpc_archs + 10),
 129   N (64, bfd_mach_ppc_rs64ii,   "powerpc:rs64ii",  false, bfd_powerpc_archs + 11),
 130   N (64, bfd_mach_ppc_rs64iii,  "powerpc:rs64iii", false, bfd_powerpc_archs + 12),
 131   N (32, bfd_mach_ppc_7400,     "powerpc:7400",    false, bfd_powerpc_archs + 13),
 132   N (32, bfd_mach_ppc_e500,     "powerpc:e500",    false, bfd_powerpc_archs + 14),
 133   N (32, bfd_mach_ppc_e500mc,   "powerpc:e500mc",  false, bfd_powerpc_archs + 15),
 134   N (64, bfd_mach_ppc_e500mc64, "powerpc:e500mc64",false, bfd_powerpc_archs + 16),
 135   N (32, bfd_mach_ppc_860,      "powerpc:MPC8XX",  false, bfd_powerpc_archs + 17),
 136   N (32, bfd_mach_ppc_750,      "powerpc:750",     false, bfd_powerpc_archs + 18),
 137   N (32, bfd_mach_ppc_titan,    "powerpc:titan",   false, bfd_powerpc_archs + 19),
 138
 139   {
 140     16, /* Bits in a word.  */
 141     32, /* Bits in an address.  */
 142     8,  /* Bits in a byte.  */
 143     bfd_arch_powerpc,
 144     bfd_mach_ppc_vle,
 145     "powerpc",
 146     "powerpc:vle",
 147     3,
 148     false, /* Not the default.  */
 149     powerpc_compatible,
 150     bfd_default_scan,
 151     bfd_arch_default_fill,
 152     bfd_powerpc_archs + 20,
 153     0 /* Maximum offset of a reloc from the start of an insn.  */
 154   },
 155
 156   N (64, bfd_mach_ppc_e5500, "powerpc:e5500", false, bfd_powerpc_archs + 21),
 157   N (64, bfd_mach_ppc_e6500, "powerpc:e6500", false, NULL)
 158 };