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// arm.h -- ELF definitions specific to EM_ARM  -*- C++ -*-

// Copyright 2009, Free Software Foundation, Inc.

// Written by Doug Kwan <dougkwan@google.com>.

// This file is part of elfcpp.

// This program is free software; you can redistribute it and/or

// modify it under the terms of the GNU Library General Public License

// as published by the Free Software Foundation; either version 2, or

// (at your option) any later version.

// In addition to the permissions in the GNU Library General Public

// License, the Free Software Foundation gives you unlimited

// permission to link the compiled version of this file into

// combinations with other programs, and to distribute those

// combinations without any restriction coming from the use of this

// file.  (The Library Public License restrictions do apply in other

// respects; for example, they cover modification of the file, and

// distribution when not linked into a combined executable.)

// This program is distributed in the hope that it will be useful, but

// WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

// Library General Public License for more details.

// You should have received a copy of the GNU Library General Public

// License along with this program; if not, write to the Free Software

// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA

// 02110-1301, USA.

#ifndef ELFCPP_ARM_H

#define ELFCPP_ARM_H

// The relocation type information is taken from:

//

//   ELF for the ARM Architecture

//   Document number: ARM IHI 0044C, current through ABI release 2.07

//   Date of Issue: 10th October, 2008

//

namespace elfcpp

{

//

// ARM Relocations Codes

//

// Operation notes: 

//   S: Address of the symbol.

//   A: Addend for relocation.

//   P: Address of the place being relocated.

//   Pa: Adjusted address of the place being relocated (P & 0xfffffffc)

//   T: is 1 if S has type STT_FUNC and the symbol addresses a Thumb

//      instruction.Thumb-bit; it is 0 otherwise.

//   B(S): Addressing origin of the output segment defining S.

//   GOT_ORG: Addressing origin of the Global Offset Table.

//   GOT(S): Address of the GOT entry for S.

//

enum

{

                                // Type         Class   Operation               

                                // ------------------------------

  R_ARM_NONE = 0,                // Static       Misc

  R_ARM_PC24 = 1,               // Deprecated   ARM     ((S + A) | T) - P

  R_ARM_ABS32 = 2,              // Static       Data    (S + A) | T

  R_ARM_REL32 = 3,              // Static       Data    ((S + A) | T) - P

  R_ARM_LDR_PC_G0 = 4,          // Static       ARM     S + A - P

  R_ARM_ABS16 = 5,              // Static       Data    S + A

  R_ARM_ABS12 = 6,              // Static       ARM     S + A

  R_ARM_THM_ABS5 = 7,           // Static       Thumb16 S + A

  R_ARM_ABS8 = 8,               // Static       Data    S + A

  R_ARM_SBREL32 = 9,            // Static       Data    ((S + A) | T) - B(S)

  R_ARM_THM_CALL = 10,          // Static       Thumb32 ((S + A) | T) - P

  R_ARM_THM_PC8 = 11,           // Static       Thumb16

  R_ARM_BREL_ADJ = 12,          // Dynamic      Data    DeltaB(S) + A

  R_ARM_TLS_DESC = 13,          // Dynamic      Data

  R_ARM_THM_SWI8 = 14,          // Obsolete

  R_ARM_XPC25 = 15,             // Obsolete

  R_ARM_THM_XPC22 = 16,         // Obsolete

  R_ARM_TLS_DTPMOD32 = 17,      // Dynamic      Data    Module(S)

  R_ARM_TLS_DTPOFF32 = 18,      // Dynamic      Data    S + A - TLS

  R_ARM_TLS_TPOFF32 = 19,       // Dynamic      Data    S + A - tp

  R_ARM_COPY = 20,              // Dynamic      Misc

  R_ARM_GLOB_DAT = 21,          // Dynamic      Data    (S + A) | T

  R_ARM_JUMP_SLOT = 22,         // Dynamic      Data    (S + A) | T

  R_ARM_RELATIVE = 23,          // Dynamic      Data    B(S) + A

  R_ARM_GOTOFF32 = 24,          // Static       Data    (((S + A) | T) - GOT_ORG

  R_ARM_BASE_PREL = 25,         // Static       Data    B(S) + A - P

  R_ARM_GOT_BREL = 26,          // Static       Data    GOT(S) + A - GOT_ORG

  R_ARM_PLT32 = 27,             // Deprecated   ARM     ((S + A) | T) - P

  R_ARM_CALL = 28,              // Static       ARM     ((S + A) | T) - P

  R_ARM_JUMP24 = 29,            // Static       ARM     ((S + A) | T) - P

  R_ARM_THM_JUMP24 = 30,        // Static       Thumb32 ((S + A) | T) - P

  R_ARM_BASE_ABS = 31,          // Static       Data    B(S) + A

  R_ARM_ALU_PCREL_7_0 = 32,     // Obsolete

  R_ARM_ALU_PCREL_15_8 = 33,    // Obsolete

  R_ARM_ALU_PCREL_23_15 = 34,   // Obsolete

  R_ARM_LDR_SBREL_11_0_NC = 35, // Deprecated   ARM     S + A - B(S)

  R_ARM_ALU_SBREL_19_12_NC = 36,// Deprecated   ARM     S + A - B(S)

  R_ARM_ALU_SBREL_27_20_CK = 37,// Deprecated   ARM     S + A - B(S)

  R_ARM_TARGET1 = 38,           // Data         Misc    (S + A) | T or

                                //                      ((S + A) | T) - P

  R_ARM_SBREL31 = 39,           // Deprecated   Data    ((S + A) | T) - B(S)

  R_ARM_V4BX = 40,              // Static       Misc 

  R_ARM_TARGET2 = 41,           // Static       Misc

  R_ARM_PREL31 = 42,            // Static       Data    ((S + A) | T) - P

  R_ARM_MOVW_ABS_NC = 43,       // Static       ARM     (S + A) | T

  R_ARM_MOVT_ABS = 44,          // Static       ARM     S + A

  R_ARM_MOVW_PREL_NC = 45,      // Static       ARM     ((S + A) | T) - P

  R_ARM_MOVT_PREL = 46,         // Static       ARM     S + A - P

  R_ARM_THM_MOVW_ABS_NC = 47,   // Static       Thumb32 (S + A) | T

  R_ARM_THM_MOVT_ABS = 48,      // Static       Thumb32 S + A - P

  R_ARM_THM_MOVW_PREL_NC =  49, // Static       Thumb32 ((S + A) | T) - P

  R_ARM_THM_MOVT_PREL = 50,     // Static       Thumb32 S + A - P

  R_ARM_THM_JUMP19 = 51,        // Static       Thumb32 ((S + A) | T) - P

  R_ARM_THM_JUMP6 = 52,         // Static       Thumb16 S + A - P

  R_ARM_THM_ALU_PREL_11_0 = 53, // Static       Thumb32 ((S + A) | T) - Pa

  R_ARM_THM_PC12 = 54,          // Static       Thumb32 S + A - Pa

  R_ARM_ABS32_NOI = 55,         // Static       Data    S + A

  R_ARM_REL32_NOI = 56,         // Static       Data    S + A - P

  R_ARM_ALU_PC_G0_NC = 57,      // Static       ARM     ((S + A) | T) - P

  R_ARM_ALU_PC_G0 = 58,         // Static       ARM     ((S + A) | T) - P

  R_ARM_ALU_PC_G1_NC = 59,      // Static       ARM     ((S + A) | T) - P

  R_ARM_ALU_PC_G1 = 60,         // Static       ARM     ((S + A) | T) - P

  R_ARM_ALU_PC_G2 = 61,         // Static       ARM     ((S + A) | T) - P

  R_ARM_LDR_PC_G1 = 62,         // Static       ARM     S + A - P

  R_ARM_LDR_PC_G2 = 63,         // Static       ARM     S + A - P

  R_ARM_LDRS_PC_G0 = 64,        // Static       ARM     S + A - P

  R_ARM_LDRS_PC_G1 = 65,        // Static       ARM     S + A - P

  R_ARM_LDRS_PC_G2 = 66,        // Static       ARM     S + A - P

  R_ARM_LDC_PC_G0 = 67,         // Static       ARM     S + A - P

  R_ARM_LDC_PC_G1 = 68,         // Static       ARM     S + A - P

  R_ARM_LDC_PC_G2 = 69,         // Static       ARM     S + A - P

  R_ARM_ALU_SB_G0_NC = 70,      // Static       ARM     ((S + A) | T) - B(S)

  R_ARM_ALU_SB_G0 = 71,         // Static       ARM     ((S + A) | T) - B(S)

  R_ARM_ALU_SB_G1_NC = 72,      // Static       ARM     ((S + A) | T) - B(S)

  R_ARM_ALU_SB_G1 = 73,         // Static       ARM     ((S + A) | T) - B(S)

  R_ARM_ALU_SB_G2 = 74,         // Static       ARM     ((S + A) | T) - B(S)

  R_ARM_LDR_SB_G0 = 75,         // Static       ARM     S + A - B(S)

  R_ARM_LDR_SB_G1 = 76,         // Static       ARM     S + A - B(S)

  R_ARM_LDR_SB_G2 = 77,         // Static       ARM     S + A - B(S)

  R_ARM_LDRS_SB_G0 = 78,        // Static       ARM     S + A - B(S)

  R_ARM_LDRS_SB_G1 = 79,        // Static       ARM     S + A - B(S)

  R_ARM_LDRS_SB_G2 = 80,        // Static       ARM     S + A - B(S)

  R_ARM_LDC_SB_G0 = 81,         // Static       ARM     S + A - B(S)

  R_ARM_LDC_SB_G1 = 82,         // Static       ARM     S + A - B(S)

  R_ARM_LDC_SB_G2 = 83,         // Static       ARM     S + A - B(S)

  R_ARM_MOVW_BREL_NC = 84,      // Static       ARM     ((S + A) | T) - B(S)

  R_ARM_MOVT_BREL = 85,         // Static       ARM     S + A - B(S)

  R_ARM_MOVW_BREL = 86,         // Static       ARM     ((S + A) | T) - B(S)

  R_ARM_THM_MOVW_BREL_NC = 87,  // Static       Thumb32 ((S + A) | T) - B(S)

  R_ARM_THM_MOVT_BREL = 88,     // Static       Thumb32 S + A - B(S)

  R_ARM_THM_MOVW_BREL = 89,     // Static       Thumb32 ((S + A) | T) - B(S)

  R_ARM_TLS_GOTDESC = 90,       // Static       Data

  R_ARM_TLS_CALL = 91,          // Static       ARM

  R_ARM_TLS_DESCSEQ = 92,       // Static       ARM     TLS relaxation

  R_ARM_THM_TLS_CALL = 93,      // Static       Thumb32

  R_ARM_PLT32_ABS =  94,        // Static       Data    PLT(S) + A

  R_ARM_GOT_ABS =  95,          // Static       Data    GOT(S) + A

  R_ARM_GOT_PREL = 96,          // Static       Data    GOT(S) + A - P

  R_ARM_GOT_BREL12 =  97,       // Static       ARM     GOT(S) + A - GOT_ORG

  R_ARM_GOTOFF12 =  98,         // Static       ARM     S + A - GOT_ROG

  R_ARM_GOTRELAX =  99,         // Static       Misc

  R_ARM_GNU_VTENTRY = 100,      // Deprecated   Data

  R_ARM_GNU_VTINHERIT = 101,    // Deprecated   Data

  R_ARM_THM_JUMP11 = 102,       // Static       Thumb16 S + A - P

  R_ARM_THM_JUMP8 = 103,        // Static       Thumb16 S + A - P

  R_ARM_TLS_GD32 = 104,         // Static       Data    GOT(S) + A - P

  R_ARM_TLS_LDM32 = 105,        // Static       Data    GOT(S) + A - P

  R_ARM_TLS_LDO32 = 106,        // Static       Data    S + A - TLS

  R_ARM_TLS_IE32 = 107,         // Static       Data    GOT(S) + A - P

  R_ARM_TLS_LE32 = 108,         // Static       Data    S + A - tp

  R_ARM_TLS_LDO12 = 109,        // Static       ARM     S + A - TLS

  R_ARM_TLS_LE12 = 110,         // Static       ARM     S + A - tp

  R_ARM_TLS_IE12GP = 111,       // Static       ARM     GOT(S) + A - GOT_ORG

  R_ARM_PRIVATE_0 = 112,        // Private (n = 0, 1, ... 15)

  R_ARM_PRIVATE_1 = 113,

  R_ARM_PRIVATE_2 = 114,

  R_ARM_PRIVATE_3 = 115,

  R_ARM_PRIVATE_4 = 116,

  R_ARM_PRIVATE_5 = 117,

  R_ARM_PRIVATE_6 = 118,

  R_ARM_PRIVATE_7 = 119,

  R_ARM_PRIVATE_8 = 120,

  R_ARM_PRIVATE_9 = 121,

  R_ARM_PRIVATE_10 = 122,

  R_ARM_PRIVATE_11 = 123,

  R_ARM_PRIVATE_12 = 124,

  R_ARM_PRIVATE_13 = 125,

  R_ARM_PRIVATE_14 = 126,

  R_ARM_PRIVATE_15 = 127,

  R_ARM_ME_TOO = 128,           // Obsolete

  R_ARM_THM_TLS_DESCSEQ16 = 129,// Static       Thumb16 

  R_ARM_THM_TLS_DESCSEQ32 = 130,// Static       Thumb32

  // 131 - 139                  Unallocated

  // 140 - 159                  Dynamic         Reserved for future allocation

  // 160 - 255                  Unallocated

};

// e_flags values used for ARM.  We only support flags defined in AAELF.

enum

{

  EF_ARM_BE8 = 0x00800000,

  // Mask to extract EABI version, not really a flag value.

  EF_ARM_EABIMASK = 0xFF000000,

  EF_ARM_EABI_UNKNOWN = 0x00000000,

  EF_ARM_EABI_VER1 = 0x01000000,

  EF_ARM_EABI_VER2 = 0x02000000,

  EF_ARM_EABI_VER3 = 0x03000000,

  EF_ARM_EABI_VER4 = 0x04000000,

  EF_ARM_EABI_VER5 = 0x05000000,

};

// Extract EABI version from flags.

inline Elf_Word

arm_eabi_version(Elf_Word flags)

{ return flags & EF_ARM_EABIMASK; }

// Values for the Tag_CPU_arch EABI attribute.

enum

{

  TAG_CPU_ARCH_PRE_V4,

  TAG_CPU_ARCH_V4,

  TAG_CPU_ARCH_V4T,

  TAG_CPU_ARCH_V5T,

  TAG_CPU_ARCH_V5TE,

  TAG_CPU_ARCH_V5TEJ,

  TAG_CPU_ARCH_V6,

  TAG_CPU_ARCH_V6KZ,

  TAG_CPU_ARCH_V6T2,

  TAG_CPU_ARCH_V6K,

  TAG_CPU_ARCH_V7,

  TAG_CPU_ARCH_V6_M,

  TAG_CPU_ARCH_V6S_M,

  TAG_CPU_ARCH_V7E_M,

  MAX_TAG_CPU_ARCH = TAG_CPU_ARCH_V7E_M,

  // Pseudo-architecture to allow objects to be compatible with the subset of

  // armv4t and armv6-m.  This value should never be stored in object files.

  TAG_CPU_ARCH_V4T_PLUS_V6_M = (MAX_TAG_CPU_ARCH + 1)

};

// EABI object attributes.

enum

{

  // 0-3 are generic.

  Tag_CPU_raw_name = 4,

  Tag_CPU_name = 5,

  Tag_CPU_arch = 6,

  Tag_CPU_arch_profile = 7,

  Tag_ARM_ISA_use = 8,

  Tag_THUMB_ISA_use = 9,

  Tag_FP_arch = 10,

  Tag_WMMX_arch = 11,

  Tag_Advanced_SIMD_arch = 12,

  Tag_PCS_config = 13,

  Tag_ABI_PCS_R9_use = 14,

  Tag_ABI_PCS_RW_data = 15,

  Tag_ABI_PCS_RO_data = 16,

  Tag_ABI_PCS_GOT_use = 17,

  Tag_ABI_PCS_wchar_t = 18,

  Tag_ABI_FP_rounding = 19,

  Tag_ABI_FP_denormal = 20,

  Tag_ABI_FP_exceptions = 21,

  Tag_ABI_FP_user_exceptions = 22,

  Tag_ABI_FP_number_model = 23,

  Tag_ABI_align_needed = 24,

  Tag_ABI_align_preserved = 25,

  Tag_ABI_enum_size = 26,

  Tag_ABI_HardFP_use = 27,

  Tag_ABI_VFP_args = 28,

  Tag_ABI_WMMX_args = 29,

  Tag_ABI_optimization_goals = 30,

  Tag_ABI_FP_optimization_goals = 31,

  // 32 is generic (Tag_compatibility).

  Tag_undefined33 = 33,

  Tag_CPU_unaligned_access = 34,

  Tag_undefined35 = 35,

  Tag_FP_HP_extension = 36,

  Tag_undefined37 = 37,

  Tag_ABI_FP_16bit_format = 38,

  Tag_undefined39 = 39,

  Tag_undefined40 = 40,

  Tag_undefined41 = 41,

  Tag_MPextension_use = 42,

  Tag_undefined43 = 43,

  Tag_DIV_use = 44,

  Tag_nodefaults = 64,

  Tag_also_compatible_with = 65,

  Tag_T2EE_use = 66,

  Tag_conformance = 67,

  Tag_Virtualization_use = 68,

  Tag_undefined69 = 69,

  Tag_MPextension_use_legacy = 70,

  // The following tags are legacy names for other tags.

  Tag_VFP_arch = Tag_FP_arch,

  Tag_ABI_align8_needed = Tag_ABI_align_needed,

  Tag_ABI_align8_preserved = Tag_ABI_align_preserved,

  Tag_VFP_HP_extension = Tag_FP_HP_extension

};

// Values for Tag_ABI_PCS_R9_use.

enum

{

  AEABI_R9_V6 = 0,

  AEABI_R9_SB = 1,

  AEABI_R9_TLS = 2,

  AEABI_R9_unused = 3

};

// Values for Tag_ABI_PCS_RW_data.

enum

{

  AEABI_PCS_RW_data_absolute = 0,

  AEABI_PCS_RW_data_PCrel = 1,

  AEABI_PCS_RW_data_SBrel = 2,

  AEABI_PCS_RW_data_unused = 3

};

// Values for Tag_ABI_enum_size.

enum

{

  AEABI_enum_unused = 0,

  AEABI_enum_short = 1,

  AEABI_enum_wide = 2,

  AEABI_enum_forced_wide = 3

};

// For Exception Index Table. (Exception handling ABI for the ARM

// architectue, Section 5)

enum

{

  EXIDX_CANTUNWIND = 1,

};

} // End namespace elfcpp.

#endif // !defined(ELFCPP_ARM_H)