/* ARM ELF support for BFD. Copyright (C) 1998-2019 Free Software Foundation, Inc. This file is part of BFD, the Binary File Descriptor library. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. 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 General Public License for more details. You should have received a copy of the GNU 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 _ELF_ARM_H #define _ELF_ARM_H #include "elf/reloc-macros.h" /* Processor specific flags for the ELF header e_flags field. */ /* Old ABI (ie GNU pre EABI). These are deprecated. */ #define EF_ARM_RELEXEC 0x01 #define EF_ARM_INTERWORK 0x04 #define EF_ARM_APCS_26 0x08 #define EF_ARM_APCS_FLOAT 0x10 #define EF_ARM_PIC 0x20 #define EF_ARM_ALIGN8 0x40 /* 8-bit structure alignment is in use. */ #define EF_ARM_NEW_ABI 0x80 #define EF_ARM_OLD_ABI 0x100 #define EF_ARM_SOFT_FLOAT 0x200 #define EF_ARM_VFP_FLOAT 0x400 #define EF_ARM_MAVERICK_FLOAT 0x800 /* Frame unwind information */ #define PT_ARM_EXIDX (PT_LOPROC + 1) /* Old ARM ELF spec. version B-01. Mostly deprecated. */ #define EF_ARM_SYMSARESORTED 0x04 /* NB conflicts with EF_INTERWORK. */ #define EF_ARM_DYNSYMSUSESEGIDX 0x08 /* NB conflicts with EF_APCS26. */ #define EF_ARM_MAPSYMSFIRST 0x10 /* NB conflicts with EF_APCS_FLOAT. */ /* New constants defined in the ARM ELF spec. version XXX (AAELF). Only valid in conjunction with EF_ARM_EABI_VER5. */ #define EF_ARM_ABI_FLOAT_SOFT 0x200 /* NB conflicts with EF_ARM_SOFT_FLOAT. */ #define EF_ARM_ABI_FLOAT_HARD 0x400 /* NB conflicts with EF_ARM_VFP_FLOAT. */ /* Constants defined in AAELF. */ #define EF_ARM_BE8 0x00800000 #define EF_ARM_LE8 0x00400000 #define EF_ARM_EABIMASK 0xFF000000 #define EF_ARM_EABI_VERSION(flags) ((flags) & EF_ARM_EABIMASK) #define EF_ARM_EABI_UNKNOWN 0x00000000 #define EF_ARM_EABI_VER1 0x01000000 #define EF_ARM_EABI_VER2 0x02000000 #define EF_ARM_EABI_VER3 0x03000000 #define EF_ARM_EABI_VER4 0x04000000 #define EF_ARM_EABI_VER5 0x05000000 /* Local aliases for some flags to match names used by COFF port. */ #define F_INTERWORK EF_ARM_INTERWORK #define F_APCS26 EF_ARM_APCS_26 #define F_APCS_FLOAT EF_ARM_APCS_FLOAT #define F_PIC EF_ARM_PIC #define F_SOFT_FLOAT EF_ARM_SOFT_FLOAT #define F_VFP_FLOAT EF_ARM_VFP_FLOAT /* Additional symbol types for Thumb. */ #define STT_ARM_TFUNC STT_LOPROC /* A Thumb function. */ #define STT_ARM_16BIT STT_HIPROC /* A Thumb label. */ /* Additional section types. */ #define SHT_ARM_EXIDX 0x70000001 /* Section holds ARM unwind info. */ #define SHT_ARM_PREEMPTMAP 0x70000002 /* Section pre-emption details. */ #define SHT_ARM_ATTRIBUTES 0x70000003 /* Section holds attributes. */ #define SHT_ARM_DEBUGOVERLAY 0x70000004 /* Section holds overlay debug info. */ #define SHT_ARM_OVERLAYSECTION 0x70000005 /* Section holds GDB and overlay integration info. */ /* ARM-specific values for sh_flags. */ #define SHF_ENTRYSECT 0x10000000 /* Section contains an entry point. */ #define SHF_ARM_PURECODE 0x20000000 /* Section contains only code and no data. */ #define SHF_COMDEF 0x80000000 /* Section may be multiply defined in the input to a link step. */ /* ARM-specific program header flags. */ #define PF_ARM_SB 0x10000000 /* Segment contains the location addressed by the static base. */ #define PF_ARM_PI 0x20000000 /* Segment is position-independent. */ #define PF_ARM_ABS 0x40000000 /* Segment must be loaded at its base address. */ /* Values for the Tag_CPU_arch EABI attribute. */ #define TAG_CPU_ARCH_PRE_V4 0 #define TAG_CPU_ARCH_V4 1 #define TAG_CPU_ARCH_V4T 2 #define TAG_CPU_ARCH_V5T 3 #define TAG_CPU_ARCH_V5TE 4 #define TAG_CPU_ARCH_V5TEJ 5 #define TAG_CPU_ARCH_V6 6 #define TAG_CPU_ARCH_V6KZ 7 #define TAG_CPU_ARCH_V6T2 8 #define TAG_CPU_ARCH_V6K 9 #define TAG_CPU_ARCH_V7 10 #define TAG_CPU_ARCH_V6_M 11 #define TAG_CPU_ARCH_V6S_M 12 #define TAG_CPU_ARCH_V7E_M 13 #define TAG_CPU_ARCH_V8 14 #define TAG_CPU_ARCH_V8R 15 #define TAG_CPU_ARCH_V8M_BASE 16 #define TAG_CPU_ARCH_V8M_MAIN 17 #define TAG_CPU_ARCH_V8_1M_MAIN 21 #define MAX_TAG_CPU_ARCH TAG_CPU_ARCH_V8_1M_MAIN /* 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. */ #define TAG_CPU_ARCH_V4T_PLUS_V6_M (MAX_TAG_CPU_ARCH + 1) /* Relocation types. */ START_RELOC_NUMBERS (elf_arm_reloc_type) /* AAELF official names and numbers. */ RELOC_NUMBER (R_ARM_NONE, 0) RELOC_NUMBER (R_ARM_PC24, 1) /* deprecated */ RELOC_NUMBER (R_ARM_ABS32, 2) RELOC_NUMBER (R_ARM_REL32, 3) RELOC_NUMBER (R_ARM_LDR_PC_G0, 4) RELOC_NUMBER (R_ARM_ABS16, 5) RELOC_NUMBER (R_ARM_ABS12, 6) RELOC_NUMBER (R_ARM_THM_ABS5, 7) RELOC_NUMBER (R_ARM_ABS8, 8) RELOC_NUMBER (R_ARM_SBREL32, 9) RELOC_NUMBER (R_ARM_THM_CALL, 10) RELOC_NUMBER (R_ARM_THM_PC8, 11) RELOC_NUMBER (R_ARM_BREL_ADJ, 12) RELOC_NUMBER (R_ARM_TLS_DESC, 13) RELOC_NUMBER (R_ARM_THM_SWI8, 14) /* obsolete */ RELOC_NUMBER (R_ARM_XPC25, 15) /* obsolete */ RELOC_NUMBER (R_ARM_THM_XPC22, 16) /* obsolete */ RELOC_NUMBER (R_ARM_TLS_DTPMOD32, 17) RELOC_NUMBER (R_ARM_TLS_DTPOFF32, 18) RELOC_NUMBER (R_ARM_TLS_TPOFF32, 19) RELOC_NUMBER (R_ARM_COPY, 20) /* Copy symbol at runtime. */ RELOC_NUMBER (R_ARM_GLOB_DAT, 21) /* Create GOT entry. */ RELOC_NUMBER (R_ARM_JUMP_SLOT, 22) /* Create PLT entry. */ RELOC_NUMBER (R_ARM_RELATIVE, 23) /* Adjust by program base. */ RELOC_NUMBER (R_ARM_GOTOFF32, 24) /* 32 bit offset to GOT. */ RELOC_NUMBER (R_ARM_BASE_PREL, 25) /* 32 bit PC relative offset to GOT. */ RELOC_NUMBER (R_ARM_GOT_BREL, 26) /* 32 bit GOT entry. */ RELOC_NUMBER (R_ARM_PLT32, 27) /* deprecated - 32 bit PLT address. */ RELOC_NUMBER (R_ARM_CALL, 28) RELOC_NUMBER (R_ARM_JUMP24, 29) RELOC_NUMBER (R_ARM_THM_JUMP24, 30) RELOC_NUMBER (R_ARM_BASE_ABS, 31) RELOC_NUMBER (R_ARM_ALU_PCREL7_0, 32) /* obsolete */ RELOC_NUMBER (R_ARM_ALU_PCREL15_8, 33) /* obsolete */ RELOC_NUMBER (R_ARM_ALU_PCREL23_15, 34) /* obsolete */ RELOC_NUMBER (R_ARM_LDR_SBREL_11_0, 35) /* deprecated, should have _NC suffix */ RELOC_NUMBER (R_ARM_ALU_SBREL_19_12, 36) /* deprecated, should have _NC suffix */ RELOC_NUMBER (R_ARM_ALU_SBREL_27_20, 37) /* deprecated, should have _CK suffix */ RELOC_NUMBER (R_ARM_TARGET1, 38) RELOC_NUMBER (R_ARM_SBREL31, 39) /* deprecated */ RELOC_NUMBER (R_ARM_V4BX, 40) RELOC_NUMBER (R_ARM_TARGET2, 41) RELOC_NUMBER (R_ARM_PREL31, 42) RELOC_NUMBER (R_ARM_MOVW_ABS_NC, 43) RELOC_NUMBER (R_ARM_MOVT_ABS, 44) RELOC_NUMBER (R_ARM_MOVW_PREL_NC, 45) RELOC_NUMBER (R_ARM_MOVT_PREL, 46) RELOC_NUMBER (R_ARM_THM_MOVW_ABS_NC, 47) RELOC_NUMBER (R_ARM_THM_MOVT_ABS, 48) RELOC_NUMBER (R_ARM_THM_MOVW_PREL_NC, 49) RELOC_NUMBER (R_ARM_THM_MOVT_PREL, 50) RELOC_NUMBER (R_ARM_THM_JUMP19, 51) RELOC_NUMBER (R_ARM_THM_JUMP6, 52) RELOC_NUMBER (R_ARM_THM_ALU_PREL_11_0, 53) RELOC_NUMBER (R_ARM_THM_PC12, 54) RELOC_NUMBER (R_ARM_ABS32_NOI, 55) RELOC_NUMBER (R_ARM_REL32_NOI, 56) RELOC_NUMBER (R_ARM_ALU_PC_G0_NC, 57) RELOC_NUMBER (R_ARM_ALU_PC_G0, 58) RELOC_NUMBER (R_ARM_ALU_PC_G1_NC, 59) RELOC_NUMBER (R_ARM_ALU_PC_G1, 60) RELOC_NUMBER (R_ARM_ALU_PC_G2, 61) RELOC_NUMBER (R_ARM_LDR_PC_G1, 62) RELOC_NUMBER (R_ARM_LDR_PC_G2, 63) RELOC_NUMBER (R_ARM_LDRS_PC_G0, 64) RELOC_NUMBER (R_ARM_LDRS_PC_G1, 65) RELOC_NUMBER (R_ARM_LDRS_PC_G2, 66) RELOC_NUMBER (R_ARM_LDC_PC_G0, 67) RELOC_NUMBER (R_ARM_LDC_PC_G1, 68) RELOC_NUMBER (R_ARM_LDC_PC_G2, 69) RELOC_NUMBER (R_ARM_ALU_SB_G0_NC, 70) RELOC_NUMBER (R_ARM_ALU_SB_G0, 71) RELOC_NUMBER (R_ARM_ALU_SB_G1_NC, 72) RELOC_NUMBER (R_ARM_ALU_SB_G1, 73) RELOC_NUMBER (R_ARM_ALU_SB_G2, 74) RELOC_NUMBER (R_ARM_LDR_SB_G0, 75) RELOC_NUMBER (R_ARM_LDR_SB_G1, 76) RELOC_NUMBER (R_ARM_LDR_SB_G2, 77) RELOC_NUMBER (R_ARM_LDRS_SB_G0, 78) RELOC_NUMBER (R_ARM_LDRS_SB_G1, 79) RELOC_NUMBER (R_ARM_LDRS_SB_G2, 80) RELOC_NUMBER (R_ARM_LDC_SB_G0, 81) RELOC_NUMBER (R_ARM_LDC_SB_G1, 82) RELOC_NUMBER (R_ARM_LDC_SB_G2, 83) RELOC_NUMBER (R_ARM_MOVW_BREL_NC, 84) RELOC_NUMBER (R_ARM_MOVT_BREL, 85) RELOC_NUMBER (R_ARM_MOVW_BREL, 86) RELOC_NUMBER (R_ARM_THM_MOVW_BREL_NC, 87) RELOC_NUMBER (R_ARM_THM_MOVT_BREL, 88) RELOC_NUMBER (R_ARM_THM_MOVW_BREL, 89) RELOC_NUMBER (R_ARM_TLS_GOTDESC, 90) RELOC_NUMBER (R_ARM_TLS_CALL, 91) RELOC_NUMBER (R_ARM_TLS_DESCSEQ, 92) RELOC_NUMBER (R_ARM_THM_TLS_CALL, 93) RELOC_NUMBER (R_ARM_PLT32_ABS, 94) RELOC_NUMBER (R_ARM_GOT_ABS, 95) RELOC_NUMBER (R_ARM_GOT_PREL, 96) RELOC_NUMBER (R_ARM_GOT_BREL12, 97) RELOC_NUMBER (R_ARM_GOTOFF12, 98) RELOC_NUMBER (R_ARM_GOTRELAX, 99) RELOC_NUMBER (R_ARM_GNU_VTENTRY, 100) /* deprecated - old C++ abi */ RELOC_NUMBER (R_ARM_GNU_VTINHERIT, 101) /* deprecated - old C++ abi */ RELOC_NUMBER (R_ARM_THM_JUMP11, 102) RELOC_NUMBER (R_ARM_THM_JUMP8, 103) RELOC_NUMBER (R_ARM_TLS_GD32, 104) RELOC_NUMBER (R_ARM_TLS_LDM32, 105) RELOC_NUMBER (R_ARM_TLS_LDO32, 106) RELOC_NUMBER (R_ARM_TLS_IE32, 107) RELOC_NUMBER (R_ARM_TLS_LE32, 108) RELOC_NUMBER (R_ARM_TLS_LDO12, 109) RELOC_NUMBER (R_ARM_TLS_LE12, 110) RELOC_NUMBER (R_ARM_TLS_IE12GP, 111) /* 112 - 127 private range */ RELOC_NUMBER (R_ARM_ME_TOO, 128) /* obsolete */ RELOC_NUMBER (R_ARM_THM_TLS_DESCSEQ ,129) RELOC_NUMBER (R_ARM_THM_ALU_ABS_G0_NC,132) RELOC_NUMBER (R_ARM_THM_ALU_ABS_G1_NC,133) RELOC_NUMBER (R_ARM_THM_ALU_ABS_G2_NC,134) RELOC_NUMBER (R_ARM_THM_ALU_ABS_G3_NC,135) RELOC_NUMBER (R_ARM_THM_BF16, 136) RELOC_NUMBER (R_ARM_THM_BF12, 137) RELOC_NUMBER (R_ARM_THM_BF18, 138) RELOC_NUMBER (R_ARM_IRELATIVE, 160) RELOC_NUMBER (R_ARM_GOTFUNCDESC, 161) RELOC_NUMBER (R_ARM_GOTOFFFUNCDESC, 162) RELOC_NUMBER (R_ARM_FUNCDESC, 163) RELOC_NUMBER (R_ARM_FUNCDESC_VALUE, 164) RELOC_NUMBER (R_ARM_TLS_GD32_FDPIC, 165) RELOC_NUMBER (R_ARM_TLS_LDM32_FDPIC, 166) RELOC_NUMBER (R_ARM_TLS_IE32_FDPIC, 167) /* Extensions? R=read-only? */ RELOC_NUMBER (R_ARM_RXPC25, 249) RELOC_NUMBER (R_ARM_RSBREL32, 250) RELOC_NUMBER (R_ARM_THM_RPC22, 251) RELOC_NUMBER (R_ARM_RREL32, 252) RELOC_NUMBER (R_ARM_RABS32, 253) RELOC_NUMBER (R_ARM_RPC24, 254) RELOC_NUMBER (R_ARM_RBASE, 255) /* Unofficial names for some of the relocs. */ FAKE_RELOC (R_ARM_GOTOFF, R_ARM_GOTOFF32) /* 32 bit offset to GOT. */ FAKE_RELOC (R_ARM_THM_PC22, R_ARM_THM_CALL) FAKE_RELOC (R_ARM_THM_PC11, R_ARM_THM_JUMP11) FAKE_RELOC (R_ARM_THM_PC9, R_ARM_THM_JUMP8) /* Relocs with both a different name, and (apparently) different meaning in GNU usage. */ FAKE_RELOC (R_ARM_GOTPC, R_ARM_BASE_PREL) /* 32 bit PC relative offset to GOT. */ FAKE_RELOC (R_ARM_GOT32, R_ARM_GOT_BREL) /* 32 bit GOT entry. */ FAKE_RELOC (R_ARM_ROSEGREL32, R_ARM_SBREL31) /* ??? */ FAKE_RELOC (R_ARM_AMP_VCALL9, R_ARM_BREL_ADJ) /* Thumb-something. Not used. */ END_RELOC_NUMBERS (R_ARM_max = 256) #ifdef BFD_ARCH_SIZE /* EABI object attributes. */ enum { /* 0-3 are generic. */ Tag_CPU_raw_name = 4, Tag_CPU_name, Tag_CPU_arch, Tag_CPU_arch_profile, Tag_ARM_ISA_use, Tag_THUMB_ISA_use, Tag_FP_arch, Tag_WMMX_arch, Tag_Advanced_SIMD_arch, Tag_PCS_config, Tag_ABI_PCS_R9_use, Tag_ABI_PCS_RW_data, Tag_ABI_PCS_RO_data, Tag_ABI_PCS_GOT_use, Tag_ABI_PCS_wchar_t, Tag_ABI_FP_rounding, Tag_ABI_FP_denormal, Tag_ABI_FP_exceptions, Tag_ABI_FP_user_exceptions, Tag_ABI_FP_number_model, Tag_ABI_align_needed, Tag_ABI_align_preserved, Tag_ABI_enum_size, Tag_ABI_HardFP_use, Tag_ABI_VFP_args, Tag_ABI_WMMX_args, Tag_ABI_optimization_goals, Tag_ABI_FP_optimization_goals, /* 32 is generic (Tag_compatibility). */ Tag_undefined33 = 33, Tag_CPU_unaligned_access, Tag_undefined35, Tag_FP_HP_extension, Tag_undefined37, Tag_ABI_FP_16bit_format, Tag_undefined39, Tag_undefined40, Tag_undefined41, Tag_MPextension_use, Tag_undefined_43, Tag_DIV_use, Tag_DSP_extension = 46, Tag_MVE_arch = 48, Tag_nodefaults = 64, Tag_also_compatible_with, Tag_T2EE_use, Tag_conformance, Tag_Virtualization_use, Tag_undefined69, Tag_MPextension_use_legacy, /* 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_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 }; #endif /* The name of the note section used to identify arm variants. */ #define ARM_NOTE_SECTION ".note.gnu.arm.ident" /* Special section names. */ #define ELF_STRING_ARM_unwind ".ARM.exidx" #define ELF_STRING_ARM_unwind_info ".ARM.extab" #define ELF_STRING_ARM_unwind_once ".gnu.linkonce.armexidx." #define ELF_STRING_ARM_unwind_info_once ".gnu.linkonce.armextab." enum arm_st_branch_type { ST_BRANCH_TO_ARM, ST_BRANCH_TO_THUMB, ST_BRANCH_LONG, ST_BRANCH_UNKNOWN, ST_BRANCH_ENUM_SIZE }; #define NUM_ENUM_ARM_ST_BRANCH_TYPE_BITS 2 #define ENUM_ARM_ST_BRANCH_TYPE_BITMASK \ ((1 << NUM_ENUM_ARM_ST_BRANCH_TYPE_BITS) - 1) #define ARM_GET_SYM_BRANCH_TYPE(STI) \ ((enum arm_st_branch_type) ((STI) & ENUM_ARM_ST_BRANCH_TYPE_BITMASK)) #ifdef BFD_ASSERT #define ARM_SET_SYM_BRANCH_TYPE(STI, TYPE) \ do { \ BFD_ASSERT (TYPE <= ST_BRANCH_ENUM_SIZE); \ BFD_ASSERT ((1 << NUM_ENUM_ARM_ST_BRANCH_TYPE_BITS) \ >= ST_BRANCH_ENUM_SIZE); \ (STI) = (((STI) & ~ENUM_ARM_ST_BRANCH_TYPE_BITMASK) \ | ((TYPE) & ENUM_ARM_ST_BRANCH_TYPE_BITMASK)); \ } while (0) #else #define ARM_SET_SYM_BRANCH_TYPE(STI, TYPE) \ (STI) = (((STI) & ~ENUM_ARM_ST_BRANCH_TYPE_BITMASK) \ | ((TYPE) & ENUM_ARM_ST_BRANCH_TYPE_BITMASK)) #endif /* Get or set whether a symbol is a special symbol of an entry function of CMSE secure code. */ #define ARM_GET_SYM_CMSE_SPCL(SYM_TARGET_INTERNAL) \ (((SYM_TARGET_INTERNAL) >> 2) & 1) #define ARM_SET_SYM_CMSE_SPCL(SYM_TARGET_INTERNAL) \ (SYM_TARGET_INTERNAL) |= 4 #endif /* _ELF_ARM_H */