| /* ARM ELF support for BFD. |
| Copyright (C) 1998-2016 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. */ |
| #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) |
| |
| /* Other constants defined in the ARM ELF spec. version B-01. */ |
| #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. */ |
| #define EF_ARM_EABIMASK 0xFF000000 |
| |
| /* New constants defined in the ARM ELF spec. version XXX. |
| 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_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_V8M_BASE 16 |
| #define TAG_CPU_ARCH_V8M_MAIN 17 |
| #define MAX_TAG_CPU_ARCH TAG_CPU_ARCH_V8M_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_IRELATIVE, 160) |
| |
| /* 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_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 */ |
