include/elf/cris.h

   1 /* CRIS ELF support for BFD.
   2    Copyright (C) 2000-2017 Free Software Foundation, Inc.
   3    Contributed by Axis Communications AB, Lund, Sweden.
   4    Written by Hans-Peter Nilsson.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software Foundation,
  20    Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  21
  22 #ifndef _ELF_CRIS_H
  23 #define _ELF_CRIS_H
  24
  25 #include "elf/reloc-macros.h"
  26
  27 /* Relocations.  */
  28 START_RELOC_NUMBERS (elf_cris_reloc_type)
  29   RELOC_NUMBER (R_CRIS_NONE,            0)
  30   RELOC_NUMBER (R_CRIS_8,               1)
  31   RELOC_NUMBER (R_CRIS_16,              2)
  32   RELOC_NUMBER (R_CRIS_32,              3)
  33
  34   /* The "PC" position is the location right after the relocation.  */
  35   RELOC_NUMBER (R_CRIS_8_PCREL,         4)
  36   RELOC_NUMBER (R_CRIS_16_PCREL,        5)
  37   RELOC_NUMBER (R_CRIS_32_PCREL,        6)
  38
  39   RELOC_NUMBER (R_CRIS_GNU_VTINHERIT,   7)
  40   RELOC_NUMBER (R_CRIS_GNU_VTENTRY,     8)
  41
  42   /* Copy contents at dynlinking.  Generated by the linker.
  43      The BFD equivalent is BFD_RELOC_CRIS_COPY.  */
  44   RELOC_NUMBER (R_CRIS_COPY, 9)
  45
  46   /* Create GOT entry.  Generated by the linker.
  47      The BFD equivalent is BFD_RELOC_CRIS_GLOB_DAT.  */
  48   RELOC_NUMBER (R_CRIS_GLOB_DAT, 10)
  49
  50   /* Create PLT entry.  Generated by the linker.
  51      The BFD equivalent is BFD_RELOC_CRIS_JUMP_SLOT.  */
  52   RELOC_NUMBER (R_CRIS_JUMP_SLOT, 11)
  53
  54   /* Adjust by program base.  Generated by the linker.
  55      The BFD equivalent is BFD_RELOC_CRIS_RELATIVE.  */
  56   RELOC_NUMBER (R_CRIS_RELATIVE, 12)
  57
  58   /* A 16-bit offset to entry in GOT and request to create GOT entry for
  59      that symbol.
  60      The BFD equivalent is BFD_RELOC_CRIS_16_GOT.  */
  61   RELOC_NUMBER (R_CRIS_16_GOT, 13)
  62
  63   /* A 32-bit offset to entry in GOT and request to create GOT entry for
  64      that symbol.
  65      The BFD equivalent is BFD_RELOC_CRIS_32_GOT.  */
  66   RELOC_NUMBER (R_CRIS_32_GOT, 14)
  67
  68   /* A 16-bit offset to entry in PLT part of GOT and request to create PLT
  69      entry for that symbol.
  70      The BFD equivalent is BFD_RELOC_CRIS_16_GOTPLT.  */
  71   RELOC_NUMBER (R_CRIS_16_GOTPLT, 15)
  72
  73   /* A 32-bit offset to entry in PLT part of GOT and request to create PLT
  74      entry for that symbol.
  75      The BFD equivalent is BFD_RELOC_CRIS_32_GOTPLT.  */
  76   RELOC_NUMBER (R_CRIS_32_GOTPLT, 16)
  77
  78   /* A 32-bit offset from GOT to (local) symbol: no GOT entry should be
  79      necessary.
  80      The BFD equivalent is BFD_RELOC_CRIS_32_GOTREL.  */
  81   RELOC_NUMBER (R_CRIS_32_GOTREL, 17)
  82
  83   /* A 32-bit offset from GOT to entry for this symbol in PLT and request
  84      to create PLT entry for symbol.
  85      The BFD equivalent is BFD_RELOC_CRIS_32_GOTREL.  */
  86   RELOC_NUMBER (R_CRIS_32_PLT_GOTREL, 18)
  87
  88   /* A 32-bit offset from location after this relocation (addend specifies
  89      offset) to entry for this symbol in PLT and request to create PLT
  90      entry for symbol.
  91      The BFD equivalent is BFD_RELOC_CRIS_32_PLT_PCREL.  */
  92   RELOC_NUMBER (R_CRIS_32_PLT_PCREL, 19)
  93
  94   /* An assembler-generated-only relocation, instructing the linker to
  95      reserve two GOT slots, carrying the R_CRIS_DTP relocation for the
  96      symbol (pointing to the first slot, the relocation fills in
  97      both).  The value is a 32-bit-value, relative to the start of the
  98      GOT.  Assembly syntax: "sym:GDGOTREL".  */
  99   RELOC_NUMBER (R_CRIS_32_GOT_GD, 20)
 100
 101   /* Similar to R_CRIS_32_GOT_GD, but the value is a 16-bit unsigned
 102      number, limiting access to 65536/4 global symbols per module (or
 103      65536/8 thread variables; loosely speaking G*4+T*8 < 65536, where
 104      T is the number of thread variables and G is the number of other
 105      external global variables and functions).  Assembly syntax:
 106      "sym:GDGOTREL16".  */
 107   RELOC_NUMBER (R_CRIS_16_GOT_GD, 21)
 108
 109   /* Similar to R_CRIS_32_GOT_GD, but the value is the absolute
 110      address of the GOT entry.  Disallowed in DSOs created with
 111      -shared.  Assembly syntax: "sym:GD".  */
 112   RELOC_NUMBER (R_CRIS_32_GD, 22)
 113
 114   /* A linker-generated-only relocation, instructing the dynamic
 115      linker to fill in the module ID and module-relative-TLS-block
 116      offset of the symbol in question, used for GOT entries.  Note
 117      that this relocation instructs to fill in two 32-bit values.  */
 118   RELOC_NUMBER (R_CRIS_DTP, 23)
 119
 120   /* An assembler-generated-only relocation, instructing the linker to
 121      reserve the first two GOT slots, and attach the R_CRIS_DTPMOD
 122      relocation(*) for the module to the first slot, the second
 123      containing zero.  The value is 32 bits, the offset from the start
 124      of the TLS block of the module to the thread-local symbol
 125      mentioned in the relocation.  This relocation must only be applied
 126      to module-local symbols.  Assembly syntax: "expr:DTPREL".  */
 127   RELOC_NUMBER (R_CRIS_32_DTPREL, 24)
 128
 129   /* Similar to R_CRIS_32_DTPREL, but the value is a 16-bit signed
 130      number, limiting the size of thread-variables of the DSO to 32768
 131      bytes.  (Note: matches both model 1 and 2 and allows use of addo.w
 132      as the instruction where this relocation is used.)  Assembly
 133      syntax: "expr:DTPREL16".  */
 134   RELOC_NUMBER (R_CRIS_16_DTPREL, 25)
 135
 136   /* An assembler-generated-only relocation, instructing the linker to
 137      reserve a GOT slot and attach the R_CRIS_32_TPREL relocation for
 138      the symbol in question.  The value is 32 bits, which is the
 139      GOT-relative offset of the slot.  Assembly syntax:
 140      "sym:TPOFFGOT".  */
 141   RELOC_NUMBER (R_CRIS_32_GOT_TPREL, 26)
 142
 143   /* Similar to R_CRIS_32_TPREL, but the value is a 16-bit positive
 144      number, limiting the number of thread- and global variables of
 145      the DSO to 32768/4.  Assembly syntax: "sym:TPOFFGOT16".  */
 146   RELOC_NUMBER (R_CRIS_16_GOT_TPREL, 27)
 147
 148   /* An assembler- and linker-generated relocation, instructing to
 149      resolve the symbol in question yielding the TLS offset of the
 150      thread variable, relative to the global TLS block.  Not allowed
 151      as input when generating a DSO.  Assembly syntax:
 152      "expr:TPOFF".  */
 153   RELOC_NUMBER (R_CRIS_32_TPREL, 28)
 154
 155   /* Similar to R_CRIS_32_TPREL, but only applicable to executables
 156      compiled with -msmall-tls. Not allowed in a DSO. The value is a
 157      16-bit signed number, limiting the size of thread-variables of
 158      the executable to 32768 bytes. (Note: being signed makes it match
 159      both model 1 and 2 and allows use of addo.w as the instruction
 160      where this relocation is applied.)  Assembly syntax:
 161      "expr:TPOFF16".  */
 162   RELOC_NUMBER (R_CRIS_16_TPREL, 29)
 163
 164   /* A linker-generated-only relocation, instructing the dynamic
 165      linker to fill in the current module ID, used for GOT entries
 166      (usually the fourth one).  */
 167   RELOC_NUMBER (R_CRIS_DTPMOD, 30)
 168
 169   /* Similar to R_CRIS_32_GOT_TPREL, but the value is the absolute
 170      address of the GOT entry.  Disallowed in DSOs created with
 171      -shared.  Assembly syntax: "sym:IE".  */
 172   RELOC_NUMBER (R_CRIS_32_IE, 31)
 173
 174   /* No other relocs must be visible outside the assembler.  */
 175
 176 END_RELOC_NUMBERS (R_CRIS_max)
 177
 178 /* User symbols in this file have a leading underscore.  */
 179 #define EF_CRIS_UNDERSCORE              0x00000001
 180
 181 /* This is a mask for different incompatible machine variants.  */
 182 #define EF_CRIS_VARIANT_MASK            0x0000000e
 183
 184 /* Variant 0; may contain v0..10 object.  */
 185 #define EF_CRIS_VARIANT_ANY_V0_V10      0x00000000
 186
 187 /* Variant 1; contains v32 object.  */
 188 #define EF_CRIS_VARIANT_V32             0x00000002
 189
 190 /* Variant 2; contains object compatible with v32 and v10.  */
 191 #define EF_CRIS_VARIANT_COMMON_V10_V32  0x00000004
 192
 193 #endif /* _ELF_CRIS_H */