include/elf/hppa.h

   1 /* HPPA ELF support for BFD.
   2    Copyright (C) 1993, 1994 Free Software Foundation, Inc.
   3
   4 This file is part of BFD, the Binary File Descriptor library.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 /* This file holds definitions specific to the HPPA ELF ABI.  Note
  21    that most of this is not actually implemented by BFD.  */
  22
  23 #ifndef _ELF_HPPA_H
  24 #define _ELF_HPPA_H
  25
  26 /* Processor specific flags for the ELF header e_flags field.  */
  27
  28 /* Target processor IDs to be placed in the low 16 bits of the flags
  29    field.  Note these names are shared with SOM, and therefore do not
  30    follow ELF naming conventions.  */
  31
  32 /* PA 1.0 big endian.  */
  33 #ifndef CPU_PA_RISC1_0
  34 #define CPU_PA_RISC1_0          0x0000020b
  35 #endif
  36
  37 /* PA 1.1 big endian.  */
  38 #ifndef CPU_PA_RISC1_1
  39 #define CPU_PA_RISC1_1          0x00000210
  40 #endif
  41
  42 /* PA 1.0 little endian (unsupported) is 0x0000028b.  */
  43 /* PA 1.1 little endian (unsupported) is 0x00000290.  */
  44
  45 /* Trap null address dereferences.  */
  46 #define ELF_PARISC_TRAPNIL      0x00010000
  47
  48 /* .PARISC.archext section is present.  */
  49 #define EF_PARISC_EXT           0x00020000
  50
  51 /* Processor specific section types.  */
  52
  53 /* Holds the global offset table, a table of pointers to external
  54    data.  */
  55 #define SHT_PARISC_GOT          SHT_LOPROC+0
  56
  57 /* Nonloadable section containing information in architecture
  58    extensions used by the code.  */
  59 #define SHT_PARISC_ARCH         SHT_LOPROC+1
  60
  61 /* Section in which $global$ is defined.  */
  62 #define SHT_PARISC_GLOBAL       SHT_LOPROC+2
  63
  64 /* Section holding millicode routines (mul, div, rem, dyncall, etc.  */
  65 #define SHT_PARISC_MILLI        SHT_LOPROC+3
  66
  67 /* Section holding unwind information for use by debuggers.  */
  68 #define SHT_PARISC_UNWIND       SHT_LOPROC+4
  69
  70 /* Section holding the procedure linkage table.  */
  71 #define SHT_PARISC_PLT          SHT_LOPROC+5
  72
  73 /* Short initialized and uninitialized data.  */
  74 #define SHT_PARISC_SDATA        SHT_LOPROC+6
  75 #define SHT_PARISC_SBSS         SHT_LOPROC+7
  76
  77 /* Optional section holding argument location/relocation info.  */
  78 #define SHT_PARISC_SYMEXTN      SHT_LOPROC+8
  79
  80 /* Option section for linker stubs.  */
  81 #define SHT_PARISC_STUBS        SHT_LOPROC+9
  82
  83 /* Processor specific section flags.  */
  84
  85 /* This section is near the global data pointer and thus allows short
  86    addressing modes to be used.  */
  87 #define SHF_PARISC_SHORT        0x20000000
  88
  89 /* Processor specific symbol types.  */
  90
  91 /* Millicode function entry point.  */
  92 #define STT_PARISC_MILLICODE    STT_LOPROC+0
  93
  94
  95 /* ELF/HPPA relocation types */
  96
  97 #include "reloc-macros.h"
  98
  99 START_RELOC_NUMBERS (elf32_hppa_reloc_type)
 100      RELOC_NUMBER (R_PARISC_NONE,      0)       /* No reloc */
 101
 102      /* These relocation types do simple base + offset relocations.  */
 103
 104      RELOC_NUMBER (R_PARISC_DIR32,  0x01)
 105      RELOC_NUMBER (R_PARISC_DIR21L, 0x02)
 106      RELOC_NUMBER (R_PARISC_DIR17R, 0x03)
 107      RELOC_NUMBER (R_PARISC_DIR17F, 0x04)
 108      RELOC_NUMBER (R_PARISC_DIR14R, 0x06)
 109
 110     /* PC-relative relocation types
 111        Typically used for calls.
 112        Note PCREL17C and PCREL17F differ only in overflow handling.
 113        PCREL17C never reports a relocation error.
 114
 115        When supporting argument relocations, function calls must be
 116        accompanied by parameter relocation information.  This information is
 117        carried in the ten high-order bits of the addend field.  The remaining
 118        22 bits of of the addend field are sign-extended to form the Addend.
 119
 120        Note the code to build argument relocations depends on the
 121        addend being zero.  A consequence of this limitation is GAS
 122        can not perform relocation reductions for function symbols.  */
 123
 124      RELOC_NUMBER (R_PARISC_PCREL21L, 0x0a)
 125      RELOC_NUMBER (R_PARISC_PCREL17R, 0x0b)
 126      RELOC_NUMBER (R_PARISC_PCREL17F, 0x0c)
 127      RELOC_NUMBER (R_PARISC_PCREL17C, 0x0d)
 128      RELOC_NUMBER (R_PARISC_PCREL14R, 0x0e)
 129      RELOC_NUMBER (R_PARISC_PCREL14F, 0x0f)
 130
 131     /* DP-relative relocation types.  */
 132      RELOC_NUMBER (R_PARISC_DPREL21L, 0x12)
 133      RELOC_NUMBER (R_PARISC_DPREL14R, 0x16)
 134      RELOC_NUMBER (R_PARISC_DPREL14F, 0x17)
 135
 136     /* Data linkage table (DLT) relocation types
 137
 138        SOM DLT_REL fixup requests are used to for static data references
 139        from position-independent code within shared libraries.  They are
 140        similar to the GOT relocation types in some SVR4 implementations.  */
 141
 142      RELOC_NUMBER (R_PARISC_DLTREL21L, 0x1a)
 143      RELOC_NUMBER (R_PARISC_DLTREL14R, 0x1e)
 144      RELOC_NUMBER (R_PARISC_DLTREL14F, 0x1f)
 145
 146     /* DLT indirect relocation types  */
 147      RELOC_NUMBER (R_PARISC_DLTIND21L, 0x22)
 148      RELOC_NUMBER (R_PARISC_DLTIND14R, 0x26)
 149      RELOC_NUMBER (R_PARISC_DLTIND14F, 0x27)
 150
 151     /* Base relative relocation types.  Ugh.  These imply lots of state */
 152      RELOC_NUMBER (R_PARISC_SETBASE,    0x28)
 153      RELOC_NUMBER (R_PARISC_BASEREL32,  0x29)
 154      RELOC_NUMBER (R_PARISC_BASEREL21L, 0x2a)
 155      RELOC_NUMBER (R_PARISC_BASEREL17R, 0x2b)
 156      RELOC_NUMBER (R_PARISC_BASEREL17F, 0x2c)
 157      RELOC_NUMBER (R_PARISC_BASEREL14R, 0x2e)
 158      RELOC_NUMBER (R_PARISC_BASEREL14F, 0x2f)
 159
 160     /* Segment relative relocation types.  */
 161      RELOC_NUMBER (R_PARISC_TEXTREL32, 0x31)
 162      RELOC_NUMBER (R_PARISC_DATAREL32, 0x39)
 163
 164     /* Plabel relocation types.  */
 165      RELOC_NUMBER (R_PARISC_PLABEL32,  0x41)
 166      RELOC_NUMBER (R_PARISC_PLABEL21L, 0x42)
 167      RELOC_NUMBER (R_PARISC_PLABEL14R, 0x46)
 168
 169     /* PLT relocations.  */
 170      RELOC_NUMBER (R_PARISC_PLTIND21L, 0x82)
 171      RELOC_NUMBER (R_PARISC_PLTIND14R, 0x86)
 172      RELOC_NUMBER (R_PARISC_PLTIND14F, 0x87)
 173
 174     /* Misc relocation types.  */
 175      RELOC_NUMBER (R_PARISC_COPY,     0x88)
 176      RELOC_NUMBER (R_PARISC_GLOB_DAT, 0x89)
 177      RELOC_NUMBER (R_PARISC_JMP_SLOT, 0x8a)
 178      RELOC_NUMBER (R_PARISC_RELATIVE, 0x8b)
 179
 180      EMPTY_RELOC (R_PARISC_UNIMPLEMENTED)
 181 END_RELOC_NUMBERS
 182
 183 #ifndef RELOC_MACROS_GEN_FUNC
 184 typedef enum elf32_hppa_reloc_type elf32_hppa_reloc_type;
 185 #endif
 186
 187 #endif /* _ELF_HPPA_H */