include/elf/ppc.h

   1 /* PPC ELF support for BFD.
   2    Copyright 1995, 1996, 1998, 2000, 2001, 2002, 2003, 2005, 2007, 2008,
   3    2009 Free Software Foundation, Inc.
   4
   5    By Michael Meissner, Cygnus Support, <meissner@cygnus.com>, from information
   6    in the System V Application Binary Interface, PowerPC Processor Supplement
   7    and the PowerPC Embedded Application 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 2 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, MA 02110-1301, USA.  */
  24
  25 /* This file holds definitions specific to the PPC ELF ABI.  Note
  26    that most of this is not actually implemented by BFD.  */
  27
  28 #ifndef _ELF_PPC_H
  29 #define _ELF_PPC_H
  30
  31 #include "elf/reloc-macros.h"
  32
  33 /* Relocations.  */
  34 START_RELOC_NUMBERS (elf_ppc_reloc_type)
  35   RELOC_NUMBER (R_PPC_NONE,               0)
  36   RELOC_NUMBER (R_PPC_ADDR32,             1)
  37   RELOC_NUMBER (R_PPC_ADDR24,             2)
  38   RELOC_NUMBER (R_PPC_ADDR16,             3)
  39   RELOC_NUMBER (R_PPC_ADDR16_LO,          4)
  40   RELOC_NUMBER (R_PPC_ADDR16_HI,          5)
  41   RELOC_NUMBER (R_PPC_ADDR16_HA,          6)
  42   RELOC_NUMBER (R_PPC_ADDR14,             7)
  43   RELOC_NUMBER (R_PPC_ADDR14_BRTAKEN,     8)
  44   RELOC_NUMBER (R_PPC_ADDR14_BRNTAKEN,    9)
  45   RELOC_NUMBER (R_PPC_REL24,             10)
  46   RELOC_NUMBER (R_PPC_REL14,             11)
  47   RELOC_NUMBER (R_PPC_REL14_BRTAKEN,     12)
  48   RELOC_NUMBER (R_PPC_REL14_BRNTAKEN,    13)
  49   RELOC_NUMBER (R_PPC_GOT16,             14)
  50   RELOC_NUMBER (R_PPC_GOT16_LO,          15)
  51   RELOC_NUMBER (R_PPC_GOT16_HI,          16)
  52   RELOC_NUMBER (R_PPC_GOT16_HA,          17)
  53   RELOC_NUMBER (R_PPC_PLTREL24,          18)
  54   RELOC_NUMBER (R_PPC_COPY,              19)
  55   RELOC_NUMBER (R_PPC_GLOB_DAT,          20)
  56   RELOC_NUMBER (R_PPC_JMP_SLOT,          21)
  57   RELOC_NUMBER (R_PPC_RELATIVE,          22)
  58   RELOC_NUMBER (R_PPC_LOCAL24PC,         23)
  59   RELOC_NUMBER (R_PPC_UADDR32,           24)
  60   RELOC_NUMBER (R_PPC_UADDR16,           25)
  61   RELOC_NUMBER (R_PPC_REL32,             26)
  62   RELOC_NUMBER (R_PPC_PLT32,             27)
  63   RELOC_NUMBER (R_PPC_PLTREL32,          28)
  64   RELOC_NUMBER (R_PPC_PLT16_LO,          29)
  65   RELOC_NUMBER (R_PPC_PLT16_HI,          30)
  66   RELOC_NUMBER (R_PPC_PLT16_HA,          31)
  67   RELOC_NUMBER (R_PPC_SDAREL16,          32)
  68   RELOC_NUMBER (R_PPC_SECTOFF,           33)
  69   RELOC_NUMBER (R_PPC_SECTOFF_LO,        34)
  70   RELOC_NUMBER (R_PPC_SECTOFF_HI,        35)
  71   RELOC_NUMBER (R_PPC_SECTOFF_HA,        36)
  72   RELOC_NUMBER (R_PPC_ADDR30,            37)
  73
  74 #ifndef RELOC_MACROS_GEN_FUNC
  75 /* Fake relocations for branch stubs, only used internally by ld.  */
  76   RELOC_NUMBER (R_PPC_RELAX,             48)
  77   RELOC_NUMBER (R_PPC_RELAX_PLT,         49)
  78   RELOC_NUMBER (R_PPC_RELAX_PLTREL24,    50)
  79 #endif
  80
  81   /* Relocs added to support TLS.  */
  82   RELOC_NUMBER (R_PPC_TLS,               67)
  83   RELOC_NUMBER (R_PPC_DTPMOD32,          68)
  84   RELOC_NUMBER (R_PPC_TPREL16,           69)
  85   RELOC_NUMBER (R_PPC_TPREL16_LO,        70)
  86   RELOC_NUMBER (R_PPC_TPREL16_HI,        71)
  87   RELOC_NUMBER (R_PPC_TPREL16_HA,        72)
  88   RELOC_NUMBER (R_PPC_TPREL32,           73)
  89   RELOC_NUMBER (R_PPC_DTPREL16,          74)
  90   RELOC_NUMBER (R_PPC_DTPREL16_LO,       75)
  91   RELOC_NUMBER (R_PPC_DTPREL16_HI,       76)
  92   RELOC_NUMBER (R_PPC_DTPREL16_HA,       77)
  93   RELOC_NUMBER (R_PPC_DTPREL32,          78)
  94   RELOC_NUMBER (R_PPC_GOT_TLSGD16,       79)
  95   RELOC_NUMBER (R_PPC_GOT_TLSGD16_LO,    80)
  96   RELOC_NUMBER (R_PPC_GOT_TLSGD16_HI,    81)
  97   RELOC_NUMBER (R_PPC_GOT_TLSGD16_HA,    82)
  98   RELOC_NUMBER (R_PPC_GOT_TLSLD16,       83)
  99   RELOC_NUMBER (R_PPC_GOT_TLSLD16_LO,    84)
 100   RELOC_NUMBER (R_PPC_GOT_TLSLD16_HI,    85)
 101   RELOC_NUMBER (R_PPC_GOT_TLSLD16_HA,    86)
 102   RELOC_NUMBER (R_PPC_GOT_TPREL16,       87)
 103   RELOC_NUMBER (R_PPC_GOT_TPREL16_LO,    88)
 104   RELOC_NUMBER (R_PPC_GOT_TPREL16_HI,    89)
 105   RELOC_NUMBER (R_PPC_GOT_TPREL16_HA,    90)
 106   RELOC_NUMBER (R_PPC_GOT_DTPREL16,      91)
 107   RELOC_NUMBER (R_PPC_GOT_DTPREL16_LO,   92)
 108   RELOC_NUMBER (R_PPC_GOT_DTPREL16_HI,   93)
 109   RELOC_NUMBER (R_PPC_GOT_DTPREL16_HA,   94)
 110   RELOC_NUMBER (R_PPC_TLSGD,             95)
 111   RELOC_NUMBER (R_PPC_TLSLD,             96)
 112
 113 /* The remaining relocs are from the Embedded ELF ABI, and are not
 114    in the SVR4 ELF ABI.  */
 115   RELOC_NUMBER (R_PPC_EMB_NADDR32,      101)
 116   RELOC_NUMBER (R_PPC_EMB_NADDR16,      102)
 117   RELOC_NUMBER (R_PPC_EMB_NADDR16_LO,   103)
 118   RELOC_NUMBER (R_PPC_EMB_NADDR16_HI,   104)
 119   RELOC_NUMBER (R_PPC_EMB_NADDR16_HA,   105)
 120   RELOC_NUMBER (R_PPC_EMB_SDAI16,       106)
 121   RELOC_NUMBER (R_PPC_EMB_SDA2I16,      107)
 122   RELOC_NUMBER (R_PPC_EMB_SDA2REL,      108)
 123   RELOC_NUMBER (R_PPC_EMB_SDA21,        109)
 124   RELOC_NUMBER (R_PPC_EMB_MRKREF,       110)
 125   RELOC_NUMBER (R_PPC_EMB_RELSEC16,     111)
 126   RELOC_NUMBER (R_PPC_EMB_RELST_LO,     112)
 127   RELOC_NUMBER (R_PPC_EMB_RELST_HI,     113)
 128   RELOC_NUMBER (R_PPC_EMB_RELST_HA,     114)
 129   RELOC_NUMBER (R_PPC_EMB_BIT_FLD,      115)
 130   RELOC_NUMBER (R_PPC_EMB_RELSDA,       116)
 131
 132 /* Support STT_GNU_IFUNC plt calls.  */
 133   RELOC_NUMBER (R_PPC_IRELATIVE,        248)
 134
 135 /* These are GNU extensions used in PIC code sequences.  */
 136   RELOC_NUMBER (R_PPC_REL16,            249)
 137   RELOC_NUMBER (R_PPC_REL16_LO,         250)
 138   RELOC_NUMBER (R_PPC_REL16_HI,         251)
 139   RELOC_NUMBER (R_PPC_REL16_HA,         252)
 140
 141 /* These are GNU extensions to enable C++ vtable garbage collection.  */
 142   RELOC_NUMBER (R_PPC_GNU_VTINHERIT,    253)
 143   RELOC_NUMBER (R_PPC_GNU_VTENTRY,      254)
 144
 145 /* This is a phony reloc to handle any old fashioned TOC16 references
 146    that may still be in object files.  */
 147   RELOC_NUMBER (R_PPC_TOC16,            255)
 148
 149 END_RELOC_NUMBERS (R_PPC_max)
 150
 151 #define IS_PPC_TLS_RELOC(R) \
 152   ((R) >= R_PPC_TLS && (R) <= R_PPC_GOT_DTPREL16_HA)
 153
 154 /* Specify the value of _GLOBAL_OFFSET_TABLE_.  */
 155 #define DT_PPC_GOT              (DT_LOPROC)
 156
 157 /* Specify that tls descriptors should be optimized.  */
 158 #define DT_PPC_TLSOPT           (DT_LOPROC + 1)
 159
 160 /* Processor specific flags for the ELF header e_flags field.  */
 161
 162 #define EF_PPC_EMB              0x80000000      /* PowerPC embedded flag.  */
 163
 164 #define EF_PPC_RELOCATABLE      0x00010000      /* PowerPC -mrelocatable flag.  */
 165 #define EF_PPC_RELOCATABLE_LIB  0x00008000      /* PowerPC -mrelocatable-lib flag.  */
 166
 167 /* Processor specific section headers, sh_type field.  */
 168
 169 #define SHT_ORDERED             SHT_HIPROC      /* Link editor is to sort the \
 170                                                    entries in this section \
 171                                                    based on the address \
 172                                                    specified in the associated \
 173                                                    symbol table entry.  */
 174
 175 /* Processor specific section flags, sh_flags field.  */
 176
 177 #define SHF_EXCLUDE             0x80000000      /* Link editor is to exclude \
 178                                                    this section from executable \
 179                                                    and shared objects that it \
 180                                                    builds when those objects \
 181                                                    are not to be furhter \
 182                                                    relocated.  */
 183
 184 /* Object attribute tags.  */
 185 enum
 186 {
 187   /* 0-3 are generic.  */
 188   Tag_GNU_Power_ABI_FP = 4, /* Value 1 for hard-float, 2 for
 189                                soft-float, 3 for single=precision
 190                                hard-float; 0 for not tagged or not
 191                                using any ABIs affected by the
 192                                differences.  */
 193
 194   /* Value 1 for general purpose registers only, 2 for AltiVec
 195      registers, 3 for SPE registers; 0 for not tagged or not using any
 196      ABIs affected by the differences.  */
 197   Tag_GNU_Power_ABI_Vector = 8,
 198
 199   /* Value 1 for ABIs using r3/r4 for returning structures <= 8 bytes,
 200      2 for ABIs using memory; 0 for not tagged or not using any ABIs
 201      affected by the differences.  */
 202   Tag_GNU_Power_ABI_Struct_Return = 12
 203 };
 204
 205 #endif /* _ELF_PPC_H */