bfd/cpu-h8300.c

   1 /* BFD library support routines for the Renesas H8/300 architecture.
   2    Copyright (C) 1990-2023 Free Software Foundation, Inc.
   3    Hacked by Steve Chamberlain of 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 #include "cpu-h8300.h"
  26
  27 static bool
  28 h8300_scan (const struct bfd_arch_info *info, const char *string)
  29 {
  30   if (*string != 'h' && *string != 'H')
  31     return false;
  32
  33   string++;
  34   if (*string != '8')
  35     return false;
  36
  37   string++;
  38   if (*string == '/')
  39     string++;
  40
  41   if (*string != '3')
  42     return false;
  43   string++;
  44   if (*string != '0')
  45     return false;
  46   string++;
  47   if (*string != '0')
  48     return false;
  49   string++;
  50   if (*string == '-')
  51     string++;
  52
  53   /* In ELF linker scripts, we typically express the architecture/machine
  54      as architecture:machine.
  55
  56      So if we've matched so far and encounter a colon, try to match the
  57      string following the colon.  */
  58   if (*string == ':')
  59     {
  60       string++;
  61       return h8300_scan (info, string);
  62     }
  63
  64   if (*string == 'h' || *string == 'H')
  65     {
  66       string++;
  67       if (*string == 'n' || *string == 'N')
  68         return (info->mach == bfd_mach_h8300hn);
  69
  70       return (info->mach == bfd_mach_h8300h);
  71     }
  72   else if (*string == 's' || *string == 'S')
  73     {
  74       string++;
  75       if (*string == 'n' || *string == 'N')
  76         return (info->mach == bfd_mach_h8300sn);
  77
  78       if (*string == 'x' || *string == 'X')
  79         {
  80           string++;
  81           if (*string == 'n' || *string == 'N')
  82             return (info->mach == bfd_mach_h8300sxn);
  83
  84           return (info->mach == bfd_mach_h8300sx);
  85         }
  86
  87       return (info->mach == bfd_mach_h8300s);
  88     }
  89   else
  90     return info->mach == bfd_mach_h8300;
  91 }
  92
  93 /* This routine is provided two arch_infos and works out the machine
  94    which would be compatible with both and returns a pointer to its
  95    info structure.  */
  96
  97 static const bfd_arch_info_type *
  98 compatible (const bfd_arch_info_type *in, const bfd_arch_info_type *out)
  99 {
 100   if (in->arch != out->arch)
 101     return 0;
 102   if (in->mach == bfd_mach_h8300sx && out->mach == bfd_mach_h8300s)
 103     return in;
 104   if (in->mach == bfd_mach_h8300s && out->mach == bfd_mach_h8300sx)
 105     return out;
 106   if (in->mach == bfd_mach_h8300sxn && out->mach == bfd_mach_h8300sn)
 107     return in;
 108   if (in->mach == bfd_mach_h8300sn && out->mach == bfd_mach_h8300sxn)
 109     return out;
 110   /* It's really not a good idea to mix and match modes.  */
 111   if (in->mach != out->mach)
 112     return 0;
 113   else
 114     return in;
 115 }
 116
 117 #define N(word, addr, number, name, print, default, next)         \
 118   { word, addr, 8, bfd_arch_h8300, number, name, print, 1, default, \
 119     compatible, h8300_scan, bfd_arch_default_fill, next, 0 }
 120
 121 static const bfd_arch_info_type h8300sxn_info_struct =
 122   N (32, 16, bfd_mach_h8300sxn, "h8300sxn", "h8300sxn", false, NULL);
 123
 124 static const bfd_arch_info_type h8300sx_info_struct =
 125   N (32, 32, bfd_mach_h8300sx, "h8300sx", "h8300sx", false, &h8300sxn_info_struct);
 126
 127 static const bfd_arch_info_type h8300sn_info_struct =
 128   N (32, 16, bfd_mach_h8300sn, "h8300sn", "h8300sn", false, &h8300sx_info_struct);
 129
 130 static const bfd_arch_info_type h8300hn_info_struct =
 131   N (32, 16, bfd_mach_h8300hn, "h8300hn", "h8300hn", false, &h8300sn_info_struct);
 132
 133 static const bfd_arch_info_type h8300s_info_struct =
 134   N (32, 32, bfd_mach_h8300s, "h8300s", "h8300s", false, & h8300hn_info_struct);
 135
 136 static const bfd_arch_info_type h8300h_info_struct =
 137   N (32, 32, bfd_mach_h8300h, "h8300h", "h8300h", false, &h8300s_info_struct);
 138
 139 const bfd_arch_info_type bfd_h8300_arch =
 140   N (16, 16, bfd_mach_h8300, "h8300", "h8300", true, &h8300h_info_struct);
 141
 142 /* Pad the given address to 32 bits, converting 16-bit and 24-bit
 143    addresses into the values they would have had on a h8s target.  */
 144
 145 bfd_vma
 146 bfd_h8300_pad_address (bfd *abfd, bfd_vma address)
 147 {
 148   /* Cope with bfd_vma's larger than 32 bits.  */
 149   address &= 0xffffffffu;
 150
 151   switch (bfd_get_mach (abfd))
 152     {
 153     case bfd_mach_h8300:
 154     case bfd_mach_h8300hn:
 155     case bfd_mach_h8300sn:
 156     case bfd_mach_h8300sxn:
 157       /* Sign extend a 16-bit address.  */
 158       if (address >= 0x8000)
 159         return address | 0xffff0000u;
 160       return address;
 161
 162     case bfd_mach_h8300h:
 163       /* Sign extend a 24-bit address.  */
 164       if (address >= 0x800000)
 165         return address | 0xff000000u;
 166       return address;
 167
 168     case bfd_mach_h8300s:
 169     case bfd_mach_h8300sx:
 170       return address;
 171
 172     default:
 173       abort ();
 174     }
 175 }