include/elf/ppc.h

   1 /* PPC ELF support for BFD.
   2    Copyright (C) 1995-2014 Free Software Foundation, Inc.
   3
   4    By Michael Meissner, Cygnus Support, <meissner@cygnus.com>,
   5    from information in the System V Application Binary Interface,
   6    PowerPC Processor Supplement and the PowerPC Embedded Application
   7    Binary Interface (eabi).
   8
   9    This file is part of BFD, the Binary File Descriptor library.
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software
  23    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  24    MA 02110-1301, USA.  */
  25
  26 /* This file holds definitions specific to the PPC ELF ABI.  Note
  27    that most of this is not actually implemented by BFD.  */
  28
  29 #ifndef _ELF_PPC_H
  30 #define _ELF_PPC_H
  31
  32 #include "elf/reloc-macros.h"
  33
  34 /* Relocations.  */
  35 START_RELOC_NUMBERS (elf_ppc_reloc_type)
  36   RELOC_NUMBER (R_PPC_NONE,               0)
  37   RELOC_NUMBER (R_PPC_ADDR32,             1)
  38   RELOC_NUMBER (R_PPC_ADDR24,             2)
  39   RELOC_NUMBER (R_PPC_ADDR16,             3)
  40   RELOC_NUMBER (R_PPC_ADDR16_LO,          4)
  41   RELOC_NUMBER (R_PPC_ADDR16_HI,          5)
  42   RELOC_NUMBER (R_PPC_ADDR16_HA,          6)
  43   RELOC_NUMBER (R_PPC_ADDR14,             7)
  44   RELOC_NUMBER (R_PPC_ADDR14_BRTAKEN,     8)
  45   RELOC_NUMBER (R_PPC_ADDR14_BRNTAKEN,    9)
  46   RELOC_NUMBER (R_PPC_REL24,             10)
  47   RELOC_NUMBER (R_PPC_REL14,             11)
  48   RELOC_NUMBER (R_PPC_REL14_BRTAKEN,     12)
  49   RELOC_NUMBER (R_PPC_REL14_BRNTAKEN,    13)
  50   RELOC_NUMBER (R_PPC_GOT16,             14)
  51   RELOC_NUMBER (R_PPC_GOT16_LO,          15)
  52   RELOC_NUMBER (R_PPC_GOT16_HI,          16)
  53   RELOC_NUMBER (R_PPC_GOT16_HA,          17)
  54   RELOC_NUMBER (R_PPC_PLTREL24,          18)
  55   RELOC_NUMBER (R_PPC_COPY,              19)
  56   RELOC_NUMBER (R_PPC_GLOB_DAT,          20)
  57   RELOC_NUMBER (R_PPC_JMP_SLOT,          21)
  58   RELOC_NUMBER (R_PPC_RELATIVE,          22)
  59   RELOC_NUMBER (R_PPC_LOCAL24PC,         23)
  60   RELOC_NUMBER (R_PPC_UADDR32,           24)
  61   RELOC_NUMBER (R_PPC_UADDR16,           25)
  62   RELOC_NUMBER (R_PPC_REL32,             26)
  63   RELOC_NUMBER (R_PPC_PLT32,             27)
  64   RELOC_NUMBER (R_PPC_PLTREL32,          28)
  65   RELOC_NUMBER (R_PPC_PLT16_LO,          29)
  66   RELOC_NUMBER (R_PPC_PLT16_HI,          30)
  67   RELOC_NUMBER (R_PPC_PLT16_HA,          31)
  68   RELOC_NUMBER (R_PPC_SDAREL16,          32)
  69   RELOC_NUMBER (R_PPC_SECTOFF,           33)
  70   RELOC_NUMBER (R_PPC_SECTOFF_LO,        34)
  71   RELOC_NUMBER (R_PPC_SECTOFF_HI,        35)
  72   RELOC_NUMBER (R_PPC_SECTOFF_HA,        36)
  73   RELOC_NUMBER (R_PPC_ADDR30,            37)
  74
  75 #ifndef RELOC_MACROS_GEN_FUNC
  76 /* Fake relocations for branch stubs, only used internally by ld.  */
  77   RELOC_NUMBER (R_PPC_RELAX,             48)
  78   RELOC_NUMBER (R_PPC_RELAX_PLT,         49)
  79   RELOC_NUMBER (R_PPC_RELAX_PLTREL24,    50)
  80 #endif
  81
  82   /* Relocs added to support TLS.  */
  83   RELOC_NUMBER (R_PPC_TLS,               67)
  84   RELOC_NUMBER (R_PPC_DTPMOD32,          68)
  85   RELOC_NUMBER (R_PPC_TPREL16,           69)
  86   RELOC_NUMBER (R_PPC_TPREL16_LO,        70)
  87   RELOC_NUMBER (R_PPC_TPREL16_HI,        71)
  88   RELOC_NUMBER (R_PPC_TPREL16_HA,        72)
  89   RELOC_NUMBER (R_PPC_TPREL32,           73)
  90   RELOC_NUMBER (R_PPC_DTPREL16,          74)
  91   RELOC_NUMBER (R_PPC_DTPREL16_LO,       75)
  92   RELOC_NUMBER (R_PPC_DTPREL16_HI,       76)
  93   RELOC_NUMBER (R_PPC_DTPREL16_HA,       77)
  94   RELOC_NUMBER (R_PPC_DTPREL32,          78)
  95   RELOC_NUMBER (R_PPC_GOT_TLSGD16,       79)
  96   RELOC_NUMBER (R_PPC_GOT_TLSGD16_LO,    80)
  97   RELOC_NUMBER (R_PPC_GOT_TLSGD16_HI,    81)
  98   RELOC_NUMBER (R_PPC_GOT_TLSGD16_HA,    82)
  99   RELOC_NUMBER (R_PPC_GOT_TLSLD16,       83)
 100   RELOC_NUMBER (R_PPC_GOT_TLSLD16_LO,    84)
 101   RELOC_NUMBER (R_PPC_GOT_TLSLD16_HI,    85)
 102   RELOC_NUMBER (R_PPC_GOT_TLSLD16_HA,    86)
 103   RELOC_NUMBER (R_PPC_GOT_TPREL16,       87)
 104   RELOC_NUMBER (R_PPC_GOT_TPREL16_LO,    88)
 105   RELOC_NUMBER (R_PPC_GOT_TPREL16_HI,    89)
 106   RELOC_NUMBER (R_PPC_GOT_TPREL16_HA,    90)
 107   RELOC_NUMBER (R_PPC_GOT_DTPREL16,      91)
 108   RELOC_NUMBER (R_PPC_GOT_DTPREL16_LO,   92)
 109   RELOC_NUMBER (R_PPC_GOT_DTPREL16_HI,   93)
 110   RELOC_NUMBER (R_PPC_GOT_DTPREL16_HA,   94)
 111   RELOC_NUMBER (R_PPC_TLSGD,             95)
 112   RELOC_NUMBER (R_PPC_TLSLD,             96)
 113
 114 /* The remaining relocs are from the Embedded ELF ABI, and are not
 115    in the SVR4 ELF ABI.  */
 116   RELOC_NUMBER (R_PPC_EMB_NADDR32,      101)
 117   RELOC_NUMBER (R_PPC_EMB_NADDR16,      102)
 118   RELOC_NUMBER (R_PPC_EMB_NADDR16_LO,   103)
 119   RELOC_NUMBER (R_PPC_EMB_NADDR16_HI,   104)
 120   RELOC_NUMBER (R_PPC_EMB_NADDR16_HA,   105)
 121   RELOC_NUMBER (R_PPC_EMB_SDAI16,       106)
 122   RELOC_NUMBER (R_PPC_EMB_SDA2I16,      107)
 123   RELOC_NUMBER (R_PPC_EMB_SDA2REL,      108)
 124   RELOC_NUMBER (R_PPC_EMB_SDA21,        109)
 125   RELOC_NUMBER (R_PPC_EMB_MRKREF,       110)
 126   RELOC_NUMBER (R_PPC_EMB_RELSEC16,     111)
 127   RELOC_NUMBER (R_PPC_EMB_RELST_LO,     112)
 128   RELOC_NUMBER (R_PPC_EMB_RELST_HI,     113)
 129   RELOC_NUMBER (R_PPC_EMB_RELST_HA,     114)
 130   RELOC_NUMBER (R_PPC_EMB_BIT_FLD,      115)
 131   RELOC_NUMBER (R_PPC_EMB_RELSDA,       116)
 132
 133 /* PowerPC VLE relocations.  */
 134   RELOC_NUMBER (R_PPC_VLE_REL8,         216)
 135   RELOC_NUMBER (R_PPC_VLE_REL15,        217)
 136   RELOC_NUMBER (R_PPC_VLE_REL24,        218)
 137   RELOC_NUMBER (R_PPC_VLE_LO16A,        219)
 138   RELOC_NUMBER (R_PPC_VLE_LO16D,        220)
 139   RELOC_NUMBER (R_PPC_VLE_HI16A,        221)
 140   RELOC_NUMBER (R_PPC_VLE_HI16D,        222)
 141   RELOC_NUMBER (R_PPC_VLE_HA16A,        223)
 142   RELOC_NUMBER (R_PPC_VLE_HA16D,        224)
 143   RELOC_NUMBER (R_PPC_VLE_SDA21,        225)
 144   RELOC_NUMBER (R_PPC_VLE_SDA21_LO,     226)
 145   RELOC_NUMBER (R_PPC_VLE_SDAREL_LO16A, 227)
 146   RELOC_NUMBER (R_PPC_VLE_SDAREL_LO16D, 228)
 147   RELOC_NUMBER (R_PPC_VLE_SDAREL_HI16A, 229)
 148   RELOC_NUMBER (R_PPC_VLE_SDAREL_HI16D, 230)
 149   RELOC_NUMBER (R_PPC_VLE_SDAREL_HA16A, 231)
 150   RELOC_NUMBER (R_PPC_VLE_SDAREL_HA16D, 232)
 151
 152 /* Support STT_GNU_IFUNC plt calls.  */
 153   RELOC_NUMBER (R_PPC_IRELATIVE,        248)
 154
 155 /* These are GNU extensions used in PIC code sequences.  */
 156   RELOC_NUMBER (R_PPC_REL16,            249)
 157   RELOC_NUMBER (R_PPC_REL16_LO,         250)
 158   RELOC_NUMBER (R_PPC_REL16_HI,         251)
 159   RELOC_NUMBER (R_PPC_REL16_HA,         252)
 160
 161 /* These are GNU extensions to enable C++ vtable garbage collection.  */
 162   RELOC_NUMBER (R_PPC_GNU_VTINHERIT,    253)
 163   RELOC_NUMBER (R_PPC_GNU_VTENTRY,      254)
 164
 165 /* This is a phony reloc to handle any old fashioned TOC16 references
 166    that may still be in object files.  */
 167   RELOC_NUMBER (R_PPC_TOC16,            255)
 168
 169 END_RELOC_NUMBERS (R_PPC_max)
 170
 171 #define IS_PPC_TLS_RELOC(R) \
 172   ((R) >= R_PPC_TLS && (R) <= R_PPC_GOT_DTPREL16_HA)
 173
 174 /* Specify the value of _GLOBAL_OFFSET_TABLE_.  */
 175 #define DT_PPC_GOT              (DT_LOPROC)
 176
 177 /* Specify that tls descriptors should be optimized.  */
 178 #define DT_PPC_OPT              (DT_LOPROC + 1)
 179 #define PPC_OPT_TLS             1
 180
 181 /* Processor specific flags for the ELF header e_flags field.  */
 182
 183 #define EF_PPC_EMB              0x80000000      /* PowerPC embedded flag.  */
 184
 185 #define EF_PPC_RELOCATABLE      0x00010000      /* PowerPC -mrelocatable flag.  */
 186 #define EF_PPC_RELOCATABLE_LIB  0x00008000      /* PowerPC -mrelocatable-lib flag.  */
 187
 188 /* Processor specific program headers, p_flags field.  */
 189 #define PF_PPC_VLE              0x10000000      /* PowerPC VLE.  */
 190
 191 /* Processor specific section headers, sh_flags field.  */
 192 #define SHF_PPC_VLE             0x10000000      /* PowerPC VLE text section.  */
 193
 194 /* Processor specific section headers, sh_type field.  */
 195
 196 #define SHT_ORDERED             SHT_HIPROC      /* Link editor is to sort the \
 197                                                    entries in this section \
 198                                                    based on the address \
 199                                                    specified in the associated \
 200                                                    symbol table entry.  */
 201
 202 /* Object attribute tags.  */
 203 enum
 204 {
 205   /* 0-3 are generic.  */
 206   Tag_GNU_Power_ABI_FP = 4, /* Value 1 for hard-float, 2 for
 207                                soft-float, 3 for single=precision
 208                                hard-float; 0 for not tagged or not
 209                                using any ABIs affected by the
 210                                differences.  */
 211
 212   /* Value 1 for general purpose registers only, 2 for AltiVec
 213      registers, 3 for SPE registers; 0 for not tagged or not using any
 214      ABIs affected by the differences.  */
 215   Tag_GNU_Power_ABI_Vector = 8,
 216
 217   /* Value 1 for ABIs using r3/r4 for returning structures <= 8 bytes,
 218      2 for ABIs using memory; 0 for not tagged or not using any ABIs
 219      affected by the differences.  */
 220   Tag_GNU_Power_ABI_Struct_Return = 12
 221 };
 222
 223 #endif /* _ELF_PPC_H */