// arm.h -- ELF definitions specific to EM_ARM -*- C++ -*-
// Copyright (C) 2009-2018 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
R_ARM_IRELATIVE = 160, // Dynamic
// 161 - 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; }
// EABI_VER5 e_flags values for identifying soft- and hard-float ABI
// choice.
enum
{
EF_ARM_ABI_FLOAT_SOFT = 0x200,
EF_ARM_ABI_FLOAT_HARD = 0x400,
};
// 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,
TAG_CPU_ARCH_V8,
MAX_TAG_CPU_ARCH = TAG_CPU_ARCH_V8,
// 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
};
// Values for Tag_ABI_FP_number_model.
enum
{
AEABI_FP_number_model_none = 0,
AEABI_FP_number_model_ieee754_number = 1,
AEABI_FP_number_model_rtabi = 2,
AEABI_FP_number_model_ieee754_all = 3
};
// Values for Tag_ABI_VFP_args.
enum
{
AEABI_VFP_args_base = 0,
AEABI_VFP_args_vfp = 1,
AEABI_VFP_args_toolchain = 2,
AEABI_VFP_args_compatible = 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)