bfd/arc-plt.h

   1 /* ARC-specific header file for PLT support.
   2    Copyright (C) 2016-2021 Free Software Foundation, Inc.
   3    Contributed by Cupertino Miranda (cmiranda@synopsys.com).
   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 #ifndef ARC_PLT_H
  23 #define ARC_PLT_H
  24
  25 /* Instructions appear in memory as a sequence of half-words (16 bit);
  26    individual half-words are represented on the target in target byte order.
  27    We use 'unsigned short' on the host to represent the PLT templates,
  28    and translate to target byte order as we copy to the target.  */
  29 typedef uint16_t insn_hword;
  30
  31 enum plt_reloc_symbol
  32 {
  33   LAST_RELOC = 0,
  34
  35   SGOT = 1,
  36
  37   RELATIVE = (1 << 8),
  38   RELATIVE_INSN_32 = (1 << 9),
  39   RELATIVE_INSN_24 = (1 << 10),
  40
  41   MIDDLE_ENDIAN = (1 << 11)
  42 };
  43
  44 #define IS_RELATIVE(S)      ((S & (RELATIVE | RELATIVE_INSN_24 | RELATIVE_INSN_32)) != 0)
  45 #define IS_INSN_32(S)       ((S & RELATIVE_INSN_32) != 0)
  46 #define IS_INSN_24(S)       ((S & RELATIVE_INSN_24) != 0)
  47 #define IS_MIDDLE_ENDIAN(S) ((S & MIDDLE_ENDIAN) != 0)
  48 #define SYM_ONLY(S)         (S & 0xFF)
  49
  50 struct plt_reloc
  51 {
  52   bfd_vma         offset;
  53   bfd_vma         size;
  54   bfd_vma         mask;
  55   enum plt_reloc_symbol symbol;
  56   bfd_vma         addend;
  57 };
  58
  59
  60 #define PLT_TYPE_START(NAME) NAME,
  61 #define PLT_TYPE_END(NAME)
  62 #define PLT_ENTRY(...)
  63 #define PLT_ELEM(...)
  64 #define ENTRY_RELOC(...)
  65 #define ELEM_RELOC(...)
  66
  67 enum plt_types_enum
  68 {
  69   PLT_START = -1,
  70 #include "arc-plt.def"
  71   PLT_MAX
  72 };
  73
  74 #undef PLT_TYPE_START
  75 #undef PLT_TYPE_END
  76 #undef PLT_ENTRY
  77 #undef PLT_ELEM
  78 #undef ENTRY_RELOC
  79 #undef ELEM_RELOC
  80
  81 typedef insn_hword insn_hword_array[];
  82
  83 struct plt_version_t
  84 {
  85   const insn_hword_array *entry;
  86   const bfd_vma           entry_size;
  87   const insn_hword_array *elem;
  88   const bfd_vma           elem_size;
  89
  90   const struct plt_reloc *entry_relocs;
  91   const struct plt_reloc *elem_relocs;
  92 };
  93
  94 #define PLT_TYPE_START(NAME) \
  95   const insn_hword NAME##_plt_entry[] = {
  96 #define PLT_TYPE_END(NAME) };
  97 #define PLT_ENTRY(...) __VA_ARGS__,
  98 #define PLT_ELEM(...)
  99 #define ENTRY_RELOC(...)
 100 #define ELEM_RELOC(...)
 101
 102 #include "arc-plt.def"
 103
 104 #undef PLT_TYPE_START
 105 #undef PLT_TYPE_END
 106 #undef PLT_ENTRY
 107 #undef PLT_ELEM
 108 #undef ENTRY_RELOC
 109 #undef ELEM_RELOC
 110
 111 #define PLT_TYPE_START(NAME) \
 112   const struct plt_reloc NAME##_plt_entry_relocs[] = {
 113 #define PLT_TYPE_END(NAME) \
 114     {0, 0, 0, LAST_RELOC, 0} \
 115   };
 116 #define PLT_ENTRY(...)
 117 #define PLT_ELEM(...)
 118 #define ENTRY_RELOC(...) { __VA_ARGS__ },
 119 #define ELEM_RELOC(...)
 120
 121 #include "arc-plt.def"
 122
 123 #undef PLT_TYPE_START
 124 #undef PLT_TYPE_END
 125 #undef PLT_ENTRY
 126 #undef PLT_ELEM
 127 #undef ENTRY_RELOC
 128 #undef ELEM_RELOC
 129
 130
 131 #define PLT_TYPE_START(NAME) \
 132   const insn_hword NAME##_plt_elem[] = {
 133 #define PLT_TYPE_END(NAME) };
 134 #define PLT_ENTRY(...)
 135 #define PLT_ELEM(...) __VA_ARGS__,
 136 #define ENTRY_RELOC(...)
 137 #define ELEM_RELOC(...)
 138
 139 #include "arc-plt.def"
 140
 141 #undef PLT_TYPE_START
 142 #undef PLT_TYPE_END
 143 #undef PLT_ENTRY
 144 #undef PLT_ELEM
 145 #undef ENTRY_RELOC
 146 #undef ELEM_RELOC
 147
 148 #define PLT_TYPE_START(NAME) \
 149   const struct plt_reloc NAME##_plt_elem_relocs[] = {
 150 #define PLT_TYPE_END(NAME) \
 151     {0, 0, 0, LAST_RELOC, 0} \
 152   };
 153 #define PLT_ENTRY(...)
 154 #define PLT_ELEM(...)
 155 #define ENTRY_RELOC(...)
 156 #define ELEM_RELOC(...) { __VA_ARGS__ },
 157
 158 #include "arc-plt.def"
 159
 160 #undef PLT_TYPE_START
 161 #undef PLT_TYPE_END
 162 #undef PLT_ENTRY
 163 #undef PLT_ELEM
 164 #undef ENTRY_RELOC
 165 #undef ELEM_RELOC
 166
 167
 168 #define PLT_TYPE_START(NAME) \
 169   { \
 170     .entry = &NAME##_plt_entry, \
 171     .entry_size = sizeof (NAME##_plt_entry), \
 172     .elem = &NAME##_plt_elem, \
 173     .elem_size = sizeof (NAME##_plt_elem),  \
 174     .entry_relocs = NAME##_plt_entry_relocs, \
 175     .elem_relocs = NAME##_plt_elem_relocs
 176 #define PLT_TYPE_END(NAME) },
 177 #define PLT_ENTRY(...)
 178 #define PLT_ELEM(...)
 179 #define ENTRY_RELOC(...)
 180 #define ELEM_RELOC(...)
 181 const struct plt_version_t plt_versions[PLT_MAX] = {
 182
 183 #include "arc-plt.def"
 184
 185 };
 186 #undef PLT_TYPE_START
 187 #undef PLT_TYPE_END
 188 #undef PLT_ENTRY
 189 #undef PLT_ELEM
 190 #undef ENTRY_RELOC
 191 #undef ELEM_RELOC
 192
 193
 194 #endif /* ARC_PLT_H */