include/elf/arm.h

   1 /* ARM ELF support for BFD.
   2    Copyright 1998, 1999, 2000, 2001, 2002 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 Foundation,
  18    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef _ELF_ARM_H
  21 #define _ELF_ARM_H
  22
  23 #include "elf/reloc-macros.h"
  24
  25 /* Processor specific flags for the ELF header e_flags field.  */
  26 #define EF_ARM_RELEXEC     0x01
  27 #define EF_ARM_HASENTRY    0x02
  28 #define EF_ARM_INTERWORK   0x04
  29 #define EF_ARM_APCS_26     0x08
  30 #define EF_ARM_APCS_FLOAT  0x10
  31 #define EF_ARM_PIC         0x20
  32 #define EF_ARM_ALIGN8      0x40         /* 8-bit structure alignment is in use.  */
  33 #define EF_ARM_NEW_ABI     0x80
  34 #define EF_ARM_OLD_ABI     0x100
  35 #define EF_ARM_SOFT_FLOAT  0x200
  36 #define EF_ARM_VFP_FLOAT   0x400
  37 #define EF_ARM_MAVERICK_FLOAT 0x800
  38
  39 /* Other constants defined in the ARM ELF spec. version B-01.  */
  40 #define EF_ARM_SYMSARESORTED 0x04       /* NB conflicts with EF_INTERWORK */
  41 #define EF_ARM_DYNSYMSUSESEGIDX 0x08    /* NB conflicts with EF_APCS26 */
  42 #define EF_ARM_MAPSYMSFIRST 0x10        /* NB conflicts with EF_APCS_FLOAT */
  43 #define EF_ARM_EABIMASK      0xFF000000
  44
  45 /* Constants defined in AAELF.  */
  46 #define EF_ARM_BE8          0x00800000
  47 #define EF_ARM_LE8          0x00400000
  48
  49 #define EF_ARM_EABI_VERSION(flags) ((flags) & EF_ARM_EABIMASK)
  50 #define EF_ARM_EABI_UNKNOWN  0x00000000
  51 #define EF_ARM_EABI_VER1     0x01000000
  52 #define EF_ARM_EABI_VER2     0x02000000
  53 #define EF_ARM_EABI_VER3     0x03000000
  54 #define EF_ARM_EABI_VER4     0x04000000
  55
  56 /* Local aliases for some flags to match names used by COFF port.  */
  57 #define F_INTERWORK        EF_ARM_INTERWORK
  58 #define F_APCS26           EF_ARM_APCS_26
  59 #define F_APCS_FLOAT       EF_ARM_APCS_FLOAT
  60 #define F_PIC              EF_ARM_PIC
  61 #define F_SOFT_FLOAT       EF_ARM_SOFT_FLOAT
  62 #define F_VFP_FLOAT        EF_ARM_VFP_FLOAT
  63
  64 /* Additional symbol types for Thumb.  */
  65 #define STT_ARM_TFUNC      STT_LOPROC   /* A Thumb function.  */
  66 #define STT_ARM_16BIT      STT_HIPROC   /* A Thumb label.  */
  67
  68 /* Additional section types.  */
  69 #define SHT_ARM_EXIDX      0x70000001   /* Section holds ARM unwind info.  */
  70
  71 /* ARM-specific values for sh_flags.  */
  72 #define SHF_ENTRYSECT      0x10000000   /* Section contains an entry point.  */
  73 #define SHF_COMDEF         0x80000000   /* Section may be multiply defined in the input to a link step.  */
  74
  75 /* ARM-specific program header flags.  */
  76 #define PF_ARM_SB          0x10000000   /* Segment contains the location addressed by the static base.  */
  77 #define PF_ARM_PI          0x20000000   /* Segment is position-independent.  */
  78 #define PF_ARM_ABS         0x40000000   /* Segment must be loaded at its base address.  */
  79
  80 /* Relocation types.  */
  81
  82 START_RELOC_NUMBERS (elf_arm_reloc_type)
  83   RELOC_NUMBER (R_ARM_NONE,             0)
  84   RELOC_NUMBER (R_ARM_PC24,             1)
  85   RELOC_NUMBER (R_ARM_ABS32,            2)
  86   RELOC_NUMBER (R_ARM_REL32,            3)
  87 #ifdef OLD_ARM_ABI
  88   RELOC_NUMBER (R_ARM_ABS8,             4)
  89   RELOC_NUMBER (R_ARM_ABS16,            5)
  90   RELOC_NUMBER (R_ARM_ABS12,            6)
  91   RELOC_NUMBER (R_ARM_THM_ABS5,         7)
  92   RELOC_NUMBER (R_ARM_THM_PC22,         8)
  93   RELOC_NUMBER (R_ARM_SBREL32,          9)
  94   RELOC_NUMBER (R_ARM_AMP_VCALL9,      10)
  95   RELOC_NUMBER (R_ARM_THM_PC11,        11)   /* Cygnus extension to abi: Thumb unconditional branch.  */
  96   RELOC_NUMBER (R_ARM_THM_PC9,         12)   /* Cygnus extension to abi: Thumb conditional branch.  */
  97   RELOC_NUMBER (R_ARM_GNU_VTINHERIT,   13)
  98   RELOC_NUMBER (R_ARM_GNU_VTENTRY,     14)
  99 #else /* not OLD_ARM_ABI */
 100   RELOC_NUMBER (R_ARM_PC13,             4)
 101   RELOC_NUMBER (R_ARM_ABS16,            5)
 102   RELOC_NUMBER (R_ARM_ABS12,            6)
 103   RELOC_NUMBER (R_ARM_THM_ABS5,         7)
 104   RELOC_NUMBER (R_ARM_ABS8,             8)
 105   RELOC_NUMBER (R_ARM_SBREL32,          9)
 106   RELOC_NUMBER (R_ARM_THM_PC22,        10)
 107   RELOC_NUMBER (R_ARM_THM_PC8,         11)
 108   RELOC_NUMBER (R_ARM_AMP_VCALL9,      12)
 109   RELOC_NUMBER (R_ARM_SWI24,           13)
 110   RELOC_NUMBER (R_ARM_THM_SWI8,        14)
 111   RELOC_NUMBER (R_ARM_XPC25,           15)
 112   RELOC_NUMBER (R_ARM_THM_XPC22,       16)
 113 #endif /* not OLD_ARM_ABI */
 114   RELOC_NUMBER (R_ARM_COPY,            20)   /* Copy symbol at runtime.  */
 115   RELOC_NUMBER (R_ARM_GLOB_DAT,        21)   /* Create GOT entry.  */
 116   RELOC_NUMBER (R_ARM_JUMP_SLOT,       22)   /* Create PLT entry.  */
 117   RELOC_NUMBER (R_ARM_RELATIVE,        23)   /* Adjust by program base.  */
 118   RELOC_NUMBER (R_ARM_GOTOFF,          24)   /* 32 bit offset to GOT.  */
 119   RELOC_NUMBER (R_ARM_GOTPC,           25)   /* 32 bit PC relative offset to GOT.  */
 120   RELOC_NUMBER (R_ARM_GOT32,           26)   /* 32 bit GOT entry.  */
 121   RELOC_NUMBER (R_ARM_PLT32,           27)   /* 32 bit PLT address.  */
 122 #ifdef OLD_ARM_ABI
 123   FAKE_RELOC   (FIRST_INVALID_RELOC,   28)
 124   FAKE_RELOC   (LAST_INVALID_RELOC,   249)
 125 #else /* not OLD_ARM_ABI */
 126   FAKE_RELOC   (FIRST_INVALID_RELOC1,  28)
 127   FAKE_RELOC   (LAST_INVALID_RELOC1,   31)
 128   RELOC_NUMBER (R_ARM_ALU_PCREL7_0,    32)
 129   RELOC_NUMBER (R_ARM_ALU_PCREL15_8,   33)
 130   RELOC_NUMBER (R_ARM_ALU_PCREL23_15,  34)
 131   RELOC_NUMBER (R_ARM_LDR_SBREL_11_0,  35)
 132   RELOC_NUMBER (R_ARM_ALU_SBREL_19_12, 36)
 133   RELOC_NUMBER (R_ARM_ALU_SBREL_27_20, 37)
 134   RELOC_NUMBER (R_ARM_TARGET1,         38)
 135   RELOC_NUMBER (R_ARM_ROSEGREL32,      39)
 136   RELOC_NUMBER (R_ARM_V4BX,            40)
 137   RELOC_NUMBER (R_ARM_TARGET2,         41)
 138   RELOC_NUMBER (R_ARM_PREL31,          42)
 139   FAKE_RELOC   (FIRST_INVALID_RELOC2,  43)
 140   FAKE_RELOC   (LAST_INVALID_RELOC2,   94)
 141   RELOC_NUMBER (R_ARM_GOT_ABS,         95)
 142   RELOC_NUMBER (R_ARM_GOT_PREL,        96)
 143   RELOC_NUMBER (R_ARM_GOT_BREL12,      97)
 144   RELOC_NUMBER (R_ARM_GOTOFF12,        98)
 145   RELOC_NUMBER (R_ARM_GOTRELAX,        99)
 146   RELOC_NUMBER (R_ARM_GNU_VTENTRY,    100)
 147   RELOC_NUMBER (R_ARM_GNU_VTINHERIT,  101)
 148   RELOC_NUMBER (R_ARM_THM_PC11,       102)   /* Cygnus extension to abi: Thumb unconditional branch.  */
 149   RELOC_NUMBER (R_ARM_THM_PC9,        103)   /* Cygnus extension to abi: Thumb conditional branch.  */
 150   FAKE_RELOC   (FIRST_INVALID_RELOC3, 104)
 151   FAKE_RELOC   (LAST_INVALID_RELOC3,  248)
 152   RELOC_NUMBER (R_ARM_RXPC25,         249)
 153 #endif /* not OLD_ARM_ABI */
 154   RELOC_NUMBER (R_ARM_RSBREL32,       250)
 155   RELOC_NUMBER (R_ARM_THM_RPC22,      251)
 156   RELOC_NUMBER (R_ARM_RREL32,         252)
 157   RELOC_NUMBER (R_ARM_RABS32,         253)
 158   RELOC_NUMBER (R_ARM_RPC24,          254)
 159   RELOC_NUMBER (R_ARM_RBASE,          255)
 160 END_RELOC_NUMBERS (R_ARM_max)
 161
 162 /* The name of the note section used to identify arm variants.  */
 163 #define ARM_NOTE_SECTION ".note.gnu.arm.ident"
 164
 165 /* Special section names.  */
 166 #define ELF_STRING_ARM_unwind           ".ARM.exidx"
 167 #define ELF_STRING_ARM_unwind_info      ".ARM.extab"
 168 #define ELF_STRING_ARM_unwind_once      ".gnu.linkonce.armexidx."
 169 #define ELF_STRING_ARM_unwind_info_once ".gnu.linkonce.armextab."
 170
 171 #endif /* _ELF_ARM_H */