bfd/arc-plt.h

   1 /* ARC-specific header file for PLT support.
   2    Copyright (C) 2016-2017 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 #include <stdint.h>
  26
  27 /* Instructions appear in memory as a sequence of half-words (16 bit);
  28    individual half-words are represented on the target in target byte order.
  29    We use 'unsigned short' on the host to represent the PLT templates,
  30    and translate to target byte order as we copy to the target.  */
  31 typedef uint16_t insn_hword;
  32
  33 enum plt_reloc_symbol
  34 {
  35   LAST_RELOC = 0,
  36
  37   SGOT = 1,
  38
  39   RELATIVE = (1 << 8),
  40   RELATIVE_INSN_32 = (1 << 9),
  41   RELATIVE_INSN_24 = (1 << 10),
  42
  43   MIDDLE_ENDIAN = (1 << 11)
  44 };
  45
  46 #define IS_RELATIVE(S)      ((S & (RELATIVE | RELATIVE_INSN_24 | RELATIVE_INSN_32)) != 0)
  47 #define IS_INSN_32(S)       ((S & RELATIVE_INSN_32) != 0)
  48 #define IS_INSN_24(S)       ((S & RELATIVE_INSN_24) != 0)
  49 #define IS_MIDDLE_ENDIAN(S) ((S & MIDDLE_ENDIAN) != 0)
  50 #define SYM_ONLY(S)         (S & 0xFF)
  51
  52 struct plt_reloc
  53 {
  54   bfd_vma         offset;
  55   bfd_vma         size;
  56   bfd_vma         mask;
  57   enum plt_reloc_symbol symbol;
  58   bfd_vma         addend;
  59 };
  60
  61
  62 #define PLT_TYPE_START(NAME) NAME,
  63 #define PLT_TYPE_END(NAME)
  64 #define PLT_ENTRY(...)
  65 #define PLT_ELEM(...)
  66 #define ENTRY_RELOC(...)
  67 #define ELEM_RELOC(...)
  68
  69 enum plt_types_enum
  70 {
  71   PLT_START = -1,
  72 #include "arc-plt.def"
  73   PLT_MAX
  74 };
  75
  76 #undef PLT_TYPE_START
  77 #undef PLT_TYPE_END
  78 #undef PLT_ENTRY
  79 #undef PLT_ELEM
  80 #undef ENTRY_RELOC
  81 #undef ELEM_RELOC
  82
  83 typedef insn_hword insn_hword_array[];
  84
  85 struct plt_version_t
  86 {
  87   const insn_hword_array *entry;
  88   const bfd_vma           entry_size;
  89   const insn_hword_array *elem;
  90   const bfd_vma           elem_size;
  91
  92   const struct plt_reloc *entry_relocs;
  93   const struct plt_reloc *elem_relocs;
  94 };
  95
  96 #define PLT_TYPE_START(NAME) \
  97   const insn_hword NAME##_plt_entry[] = {
  98 #define PLT_TYPE_END(NAME) };
  99 #define PLT_ENTRY(...) __VA_ARGS__,
 100 #define PLT_ELEM(...)
 101 #define ENTRY_RELOC(...)
 102 #define ELEM_RELOC(...)
 103
 104 #include "arc-plt.def"
 105
 106 #undef PLT_TYPE_START
 107 #undef PLT_TYPE_END
 108 #undef PLT_ENTRY
 109 #undef PLT_ELEM
 110 #undef ENTRY_RELOC
 111 #undef ELEM_RELOC
 112
 113 #define PLT_TYPE_START(NAME) \
 114   const struct plt_reloc NAME##_plt_entry_relocs[] = {
 115 #define PLT_TYPE_END(NAME) \
 116     {0, 0, 0, LAST_RELOC, 0} \
 117   };
 118 #define PLT_ENTRY(...)
 119 #define PLT_ELEM(...)
 120 #define ENTRY_RELOC(...) { __VA_ARGS__ },
 121 #define ELEM_RELOC(...)
 122
 123 #include "arc-plt.def"
 124
 125 #undef PLT_TYPE_START
 126 #undef PLT_TYPE_END
 127 #undef PLT_ENTRY
 128 #undef PLT_ELEM
 129 #undef ENTRY_RELOC
 130 #undef ELEM_RELOC
 131
 132
 133 #define PLT_TYPE_START(NAME) \
 134   const insn_hword NAME##_plt_elem[] = {
 135 #define PLT_TYPE_END(NAME) };
 136 #define PLT_ENTRY(...)
 137 #define PLT_ELEM(...) __VA_ARGS__,
 138 #define ENTRY_RELOC(...)
 139 #define ELEM_RELOC(...)
 140
 141 #include "arc-plt.def"
 142
 143 #undef PLT_TYPE_START
 144 #undef PLT_TYPE_END
 145 #undef PLT_ENTRY
 146 #undef PLT_ELEM
 147 #undef ENTRY_RELOC
 148 #undef ELEM_RELOC
 149
 150 #define PLT_TYPE_START(NAME) \
 151   const struct plt_reloc NAME##_plt_elem_relocs[] = {
 152 #define PLT_TYPE_END(NAME) \
 153     {0, 0, 0, LAST_RELOC, 0} \
 154   };
 155 #define PLT_ENTRY(...)
 156 #define PLT_ELEM(...)
 157 #define ENTRY_RELOC(...)
 158 #define ELEM_RELOC(...) { __VA_ARGS__ },
 159
 160 #include "arc-plt.def"
 161
 162 #undef PLT_TYPE_START
 163 #undef PLT_TYPE_END
 164 #undef PLT_ENTRY
 165 #undef PLT_ELEM
 166 #undef ENTRY_RELOC
 167 #undef ELEM_RELOC
 168
 169
 170 #define PLT_TYPE_START(NAME) \
 171   { \
 172     .entry = &NAME##_plt_entry, \
 173     .entry_size = sizeof (NAME##_plt_entry), \
 174     .elem = &NAME##_plt_elem, \
 175     .elem_size = sizeof (NAME##_plt_elem),  \
 176     .entry_relocs = NAME##_plt_entry_relocs, \
 177     .elem_relocs = NAME##_plt_elem_relocs
 178 #define PLT_TYPE_END(NAME) },
 179 #define PLT_ENTRY(...)
 180 #define PLT_ELEM(...)
 181 #define ENTRY_RELOC(...)
 182 #define ELEM_RELOC(...)
 183 struct plt_version_t plt_versions[PLT_MAX] = {
 184
 185 #include "arc-plt.def"
 186
 187 };
 188 #undef PLT_TYPE_START
 189 #undef PLT_TYPE_END
 190 #undef PLT_ENTRY
 191 #undef PLT_ELEM
 192 #undef ENTRY_RELOC
 193 #undef ELEM_RELOC
 194
 195
 196 #endif /* ARC_PLT_H */