| // arm.h -- ELF definitions specific to EM_ARM -*- C++ -*- |
| |
| // Copyright (C) 2009-2021 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 - 135 Unallocated |
| // Relocations for Armv8.1-M Mainline (BF/BFL) |
| R_ARM_THM_BF16 = 136, // Static Thumb32 ((S + A) | T) – P |
| R_ARM_THM_BF12 = 137, // Static Thumb32 ((S + A) | T) – P |
| R_ARM_THM_BF18 = 138, // Static Thumb32 ((S + A) | T) – P |
| // 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_MVE_arch = 48, |
| Tag_PAC_extension = 50, |
| Tag_BTI_extension = 52, |
| Tag_BTI_use = 74, |
| Tag_PACRET_use = 76, |
| 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) |