403 lines
15 KiB
C
403 lines
15 KiB
C
/* ARM ELF support for BFD.
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Copyright (C) 1998-2019 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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#ifndef _ELF_ARM_H
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#define _ELF_ARM_H
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#include "elf/reloc-macros.h"
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/* Processor specific flags for the ELF header e_flags field. */
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/* Old ABI (ie GNU pre EABI). These are deprecated. */
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#define EF_ARM_RELEXEC 0x01
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#define EF_ARM_INTERWORK 0x04
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#define EF_ARM_APCS_26 0x08
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#define EF_ARM_APCS_FLOAT 0x10
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#define EF_ARM_PIC 0x20
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#define EF_ARM_ALIGN8 0x40 /* 8-bit structure alignment is in use. */
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#define EF_ARM_NEW_ABI 0x80
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#define EF_ARM_OLD_ABI 0x100
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#define EF_ARM_SOFT_FLOAT 0x200
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#define EF_ARM_VFP_FLOAT 0x400
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#define EF_ARM_MAVERICK_FLOAT 0x800
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/* Frame unwind information */
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#define PT_ARM_EXIDX (PT_LOPROC + 1)
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/* Old ARM ELF spec. version B-01. Mostly deprecated. */
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#define EF_ARM_SYMSARESORTED 0x04 /* NB conflicts with EF_INTERWORK. */
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#define EF_ARM_DYNSYMSUSESEGIDX 0x08 /* NB conflicts with EF_APCS26. */
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#define EF_ARM_MAPSYMSFIRST 0x10 /* NB conflicts with EF_APCS_FLOAT. */
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/* New constants defined in the ARM ELF spec. version XXX (AAELF).
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Only valid in conjunction with EF_ARM_EABI_VER5. */
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#define EF_ARM_ABI_FLOAT_SOFT 0x200 /* NB conflicts with EF_ARM_SOFT_FLOAT. */
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#define EF_ARM_ABI_FLOAT_HARD 0x400 /* NB conflicts with EF_ARM_VFP_FLOAT. */
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/* Constants defined in AAELF. */
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#define EF_ARM_BE8 0x00800000
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#define EF_ARM_LE8 0x00400000
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#define EF_ARM_EABIMASK 0xFF000000
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#define EF_ARM_EABI_VERSION(flags) ((flags) & EF_ARM_EABIMASK)
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#define EF_ARM_EABI_UNKNOWN 0x00000000
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#define EF_ARM_EABI_VER1 0x01000000
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#define EF_ARM_EABI_VER2 0x02000000
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#define EF_ARM_EABI_VER3 0x03000000
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#define EF_ARM_EABI_VER4 0x04000000
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#define EF_ARM_EABI_VER5 0x05000000
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/* Local aliases for some flags to match names used by COFF port. */
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#define F_INTERWORK EF_ARM_INTERWORK
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#define F_APCS26 EF_ARM_APCS_26
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#define F_APCS_FLOAT EF_ARM_APCS_FLOAT
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#define F_PIC EF_ARM_PIC
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#define F_SOFT_FLOAT EF_ARM_SOFT_FLOAT
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#define F_VFP_FLOAT EF_ARM_VFP_FLOAT
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/* Additional symbol types for Thumb. */
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#define STT_ARM_TFUNC STT_LOPROC /* A Thumb function. */
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#define STT_ARM_16BIT STT_HIPROC /* A Thumb label. */
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/* Additional section types. */
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#define SHT_ARM_EXIDX 0x70000001 /* Section holds ARM unwind info. */
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#define SHT_ARM_PREEMPTMAP 0x70000002 /* Section pre-emption details. */
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#define SHT_ARM_ATTRIBUTES 0x70000003 /* Section holds attributes. */
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#define SHT_ARM_DEBUGOVERLAY 0x70000004 /* Section holds overlay debug info. */
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#define SHT_ARM_OVERLAYSECTION 0x70000005 /* Section holds GDB and overlay integration info. */
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/* ARM-specific values for sh_flags. */
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#define SHF_ENTRYSECT 0x10000000 /* Section contains an entry point. */
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#define SHF_ARM_PURECODE 0x20000000 /* Section contains only code and no data. */
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#define SHF_COMDEF 0x80000000 /* Section may be multiply defined in the input to a link step. */
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/* ARM-specific program header flags. */
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#define PF_ARM_SB 0x10000000 /* Segment contains the location addressed by the static base. */
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#define PF_ARM_PI 0x20000000 /* Segment is position-independent. */
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#define PF_ARM_ABS 0x40000000 /* Segment must be loaded at its base address. */
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/* Values for the Tag_CPU_arch EABI attribute. */
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#define TAG_CPU_ARCH_PRE_V4 0
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#define TAG_CPU_ARCH_V4 1
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#define TAG_CPU_ARCH_V4T 2
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#define TAG_CPU_ARCH_V5T 3
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#define TAG_CPU_ARCH_V5TE 4
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#define TAG_CPU_ARCH_V5TEJ 5
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#define TAG_CPU_ARCH_V6 6
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#define TAG_CPU_ARCH_V6KZ 7
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#define TAG_CPU_ARCH_V6T2 8
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#define TAG_CPU_ARCH_V6K 9
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#define TAG_CPU_ARCH_V7 10
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#define TAG_CPU_ARCH_V6_M 11
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#define TAG_CPU_ARCH_V6S_M 12
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#define TAG_CPU_ARCH_V7E_M 13
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#define TAG_CPU_ARCH_V8 14
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#define TAG_CPU_ARCH_V8R 15
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#define TAG_CPU_ARCH_V8M_BASE 16
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#define TAG_CPU_ARCH_V8M_MAIN 17
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#define TAG_CPU_ARCH_V8_1M_MAIN 21
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#define MAX_TAG_CPU_ARCH TAG_CPU_ARCH_V8_1M_MAIN
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/* Pseudo-architecture to allow objects to be compatible with the subset of
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armv4t and armv6-m. This value should never be stored in object files. */
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#define TAG_CPU_ARCH_V4T_PLUS_V6_M (MAX_TAG_CPU_ARCH + 1)
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/* Relocation types. */
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START_RELOC_NUMBERS (elf_arm_reloc_type)
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/* AAELF official names and numbers. */
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RELOC_NUMBER (R_ARM_NONE, 0)
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RELOC_NUMBER (R_ARM_PC24, 1) /* deprecated */
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RELOC_NUMBER (R_ARM_ABS32, 2)
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RELOC_NUMBER (R_ARM_REL32, 3)
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RELOC_NUMBER (R_ARM_LDR_PC_G0, 4)
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RELOC_NUMBER (R_ARM_ABS16, 5)
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RELOC_NUMBER (R_ARM_ABS12, 6)
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RELOC_NUMBER (R_ARM_THM_ABS5, 7)
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RELOC_NUMBER (R_ARM_ABS8, 8)
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RELOC_NUMBER (R_ARM_SBREL32, 9)
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RELOC_NUMBER (R_ARM_THM_CALL, 10)
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RELOC_NUMBER (R_ARM_THM_PC8, 11)
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RELOC_NUMBER (R_ARM_BREL_ADJ, 12)
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RELOC_NUMBER (R_ARM_TLS_DESC, 13)
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RELOC_NUMBER (R_ARM_THM_SWI8, 14) /* obsolete */
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RELOC_NUMBER (R_ARM_XPC25, 15) /* obsolete */
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RELOC_NUMBER (R_ARM_THM_XPC22, 16) /* obsolete */
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RELOC_NUMBER (R_ARM_TLS_DTPMOD32, 17)
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RELOC_NUMBER (R_ARM_TLS_DTPOFF32, 18)
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RELOC_NUMBER (R_ARM_TLS_TPOFF32, 19)
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RELOC_NUMBER (R_ARM_COPY, 20) /* Copy symbol at runtime. */
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RELOC_NUMBER (R_ARM_GLOB_DAT, 21) /* Create GOT entry. */
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RELOC_NUMBER (R_ARM_JUMP_SLOT, 22) /* Create PLT entry. */
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RELOC_NUMBER (R_ARM_RELATIVE, 23) /* Adjust by program base. */
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RELOC_NUMBER (R_ARM_GOTOFF32, 24) /* 32 bit offset to GOT. */
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RELOC_NUMBER (R_ARM_BASE_PREL, 25) /* 32 bit PC relative offset to GOT. */
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RELOC_NUMBER (R_ARM_GOT_BREL, 26) /* 32 bit GOT entry. */
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RELOC_NUMBER (R_ARM_PLT32, 27) /* deprecated - 32 bit PLT address. */
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RELOC_NUMBER (R_ARM_CALL, 28)
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RELOC_NUMBER (R_ARM_JUMP24, 29)
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RELOC_NUMBER (R_ARM_THM_JUMP24, 30)
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RELOC_NUMBER (R_ARM_BASE_ABS, 31)
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RELOC_NUMBER (R_ARM_ALU_PCREL7_0, 32) /* obsolete */
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RELOC_NUMBER (R_ARM_ALU_PCREL15_8, 33) /* obsolete */
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RELOC_NUMBER (R_ARM_ALU_PCREL23_15, 34) /* obsolete */
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RELOC_NUMBER (R_ARM_LDR_SBREL_11_0, 35) /* deprecated, should have _NC suffix */
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RELOC_NUMBER (R_ARM_ALU_SBREL_19_12, 36) /* deprecated, should have _NC suffix */
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RELOC_NUMBER (R_ARM_ALU_SBREL_27_20, 37) /* deprecated, should have _CK suffix */
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RELOC_NUMBER (R_ARM_TARGET1, 38)
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RELOC_NUMBER (R_ARM_SBREL31, 39) /* deprecated */
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RELOC_NUMBER (R_ARM_V4BX, 40)
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RELOC_NUMBER (R_ARM_TARGET2, 41)
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RELOC_NUMBER (R_ARM_PREL31, 42)
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RELOC_NUMBER (R_ARM_MOVW_ABS_NC, 43)
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RELOC_NUMBER (R_ARM_MOVT_ABS, 44)
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RELOC_NUMBER (R_ARM_MOVW_PREL_NC, 45)
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RELOC_NUMBER (R_ARM_MOVT_PREL, 46)
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RELOC_NUMBER (R_ARM_THM_MOVW_ABS_NC, 47)
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RELOC_NUMBER (R_ARM_THM_MOVT_ABS, 48)
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RELOC_NUMBER (R_ARM_THM_MOVW_PREL_NC, 49)
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RELOC_NUMBER (R_ARM_THM_MOVT_PREL, 50)
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RELOC_NUMBER (R_ARM_THM_JUMP19, 51)
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RELOC_NUMBER (R_ARM_THM_JUMP6, 52)
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RELOC_NUMBER (R_ARM_THM_ALU_PREL_11_0, 53)
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RELOC_NUMBER (R_ARM_THM_PC12, 54)
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RELOC_NUMBER (R_ARM_ABS32_NOI, 55)
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RELOC_NUMBER (R_ARM_REL32_NOI, 56)
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RELOC_NUMBER (R_ARM_ALU_PC_G0_NC, 57)
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RELOC_NUMBER (R_ARM_ALU_PC_G0, 58)
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RELOC_NUMBER (R_ARM_ALU_PC_G1_NC, 59)
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RELOC_NUMBER (R_ARM_ALU_PC_G1, 60)
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RELOC_NUMBER (R_ARM_ALU_PC_G2, 61)
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RELOC_NUMBER (R_ARM_LDR_PC_G1, 62)
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RELOC_NUMBER (R_ARM_LDR_PC_G2, 63)
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RELOC_NUMBER (R_ARM_LDRS_PC_G0, 64)
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RELOC_NUMBER (R_ARM_LDRS_PC_G1, 65)
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RELOC_NUMBER (R_ARM_LDRS_PC_G2, 66)
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RELOC_NUMBER (R_ARM_LDC_PC_G0, 67)
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RELOC_NUMBER (R_ARM_LDC_PC_G1, 68)
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RELOC_NUMBER (R_ARM_LDC_PC_G2, 69)
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RELOC_NUMBER (R_ARM_ALU_SB_G0_NC, 70)
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RELOC_NUMBER (R_ARM_ALU_SB_G0, 71)
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RELOC_NUMBER (R_ARM_ALU_SB_G1_NC, 72)
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RELOC_NUMBER (R_ARM_ALU_SB_G1, 73)
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RELOC_NUMBER (R_ARM_ALU_SB_G2, 74)
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RELOC_NUMBER (R_ARM_LDR_SB_G0, 75)
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RELOC_NUMBER (R_ARM_LDR_SB_G1, 76)
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RELOC_NUMBER (R_ARM_LDR_SB_G2, 77)
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RELOC_NUMBER (R_ARM_LDRS_SB_G0, 78)
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RELOC_NUMBER (R_ARM_LDRS_SB_G1, 79)
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RELOC_NUMBER (R_ARM_LDRS_SB_G2, 80)
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RELOC_NUMBER (R_ARM_LDC_SB_G0, 81)
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RELOC_NUMBER (R_ARM_LDC_SB_G1, 82)
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RELOC_NUMBER (R_ARM_LDC_SB_G2, 83)
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RELOC_NUMBER (R_ARM_MOVW_BREL_NC, 84)
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RELOC_NUMBER (R_ARM_MOVT_BREL, 85)
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RELOC_NUMBER (R_ARM_MOVW_BREL, 86)
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RELOC_NUMBER (R_ARM_THM_MOVW_BREL_NC, 87)
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RELOC_NUMBER (R_ARM_THM_MOVT_BREL, 88)
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RELOC_NUMBER (R_ARM_THM_MOVW_BREL, 89)
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RELOC_NUMBER (R_ARM_TLS_GOTDESC, 90)
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RELOC_NUMBER (R_ARM_TLS_CALL, 91)
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RELOC_NUMBER (R_ARM_TLS_DESCSEQ, 92)
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RELOC_NUMBER (R_ARM_THM_TLS_CALL, 93)
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RELOC_NUMBER (R_ARM_PLT32_ABS, 94)
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RELOC_NUMBER (R_ARM_GOT_ABS, 95)
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RELOC_NUMBER (R_ARM_GOT_PREL, 96)
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RELOC_NUMBER (R_ARM_GOT_BREL12, 97)
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RELOC_NUMBER (R_ARM_GOTOFF12, 98)
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RELOC_NUMBER (R_ARM_GOTRELAX, 99)
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RELOC_NUMBER (R_ARM_GNU_VTENTRY, 100) /* deprecated - old C++ abi */
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RELOC_NUMBER (R_ARM_GNU_VTINHERIT, 101) /* deprecated - old C++ abi */
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RELOC_NUMBER (R_ARM_THM_JUMP11, 102)
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RELOC_NUMBER (R_ARM_THM_JUMP8, 103)
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RELOC_NUMBER (R_ARM_TLS_GD32, 104)
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RELOC_NUMBER (R_ARM_TLS_LDM32, 105)
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RELOC_NUMBER (R_ARM_TLS_LDO32, 106)
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RELOC_NUMBER (R_ARM_TLS_IE32, 107)
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RELOC_NUMBER (R_ARM_TLS_LE32, 108)
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RELOC_NUMBER (R_ARM_TLS_LDO12, 109)
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RELOC_NUMBER (R_ARM_TLS_LE12, 110)
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RELOC_NUMBER (R_ARM_TLS_IE12GP, 111)
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/* 112 - 127 private range */
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RELOC_NUMBER (R_ARM_ME_TOO, 128) /* obsolete */
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RELOC_NUMBER (R_ARM_THM_TLS_DESCSEQ ,129)
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RELOC_NUMBER (R_ARM_THM_ALU_ABS_G0_NC,132)
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RELOC_NUMBER (R_ARM_THM_ALU_ABS_G1_NC,133)
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RELOC_NUMBER (R_ARM_THM_ALU_ABS_G2_NC,134)
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RELOC_NUMBER (R_ARM_THM_ALU_ABS_G3_NC,135)
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RELOC_NUMBER (R_ARM_THM_BF16, 136)
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RELOC_NUMBER (R_ARM_THM_BF12, 137)
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RELOC_NUMBER (R_ARM_THM_BF18, 138)
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RELOC_NUMBER (R_ARM_IRELATIVE, 160)
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RELOC_NUMBER (R_ARM_GOTFUNCDESC, 161)
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RELOC_NUMBER (R_ARM_GOTOFFFUNCDESC, 162)
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RELOC_NUMBER (R_ARM_FUNCDESC, 163)
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RELOC_NUMBER (R_ARM_FUNCDESC_VALUE, 164)
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RELOC_NUMBER (R_ARM_TLS_GD32_FDPIC, 165)
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RELOC_NUMBER (R_ARM_TLS_LDM32_FDPIC, 166)
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RELOC_NUMBER (R_ARM_TLS_IE32_FDPIC, 167)
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/* Extensions? R=read-only? */
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RELOC_NUMBER (R_ARM_RXPC25, 249)
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RELOC_NUMBER (R_ARM_RSBREL32, 250)
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RELOC_NUMBER (R_ARM_THM_RPC22, 251)
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RELOC_NUMBER (R_ARM_RREL32, 252)
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RELOC_NUMBER (R_ARM_RABS32, 253)
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RELOC_NUMBER (R_ARM_RPC24, 254)
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RELOC_NUMBER (R_ARM_RBASE, 255)
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/* Unofficial names for some of the relocs. */
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FAKE_RELOC (R_ARM_GOTOFF, R_ARM_GOTOFF32) /* 32 bit offset to GOT. */
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FAKE_RELOC (R_ARM_THM_PC22, R_ARM_THM_CALL)
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FAKE_RELOC (R_ARM_THM_PC11, R_ARM_THM_JUMP11)
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FAKE_RELOC (R_ARM_THM_PC9, R_ARM_THM_JUMP8)
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/* Relocs with both a different name, and (apparently) different meaning in
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GNU usage. */
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FAKE_RELOC (R_ARM_GOTPC, R_ARM_BASE_PREL) /* 32 bit PC relative offset to GOT. */
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FAKE_RELOC (R_ARM_GOT32, R_ARM_GOT_BREL) /* 32 bit GOT entry. */
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FAKE_RELOC (R_ARM_ROSEGREL32, R_ARM_SBREL31) /* ??? */
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FAKE_RELOC (R_ARM_AMP_VCALL9, R_ARM_BREL_ADJ) /* Thumb-something. Not used. */
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END_RELOC_NUMBERS (R_ARM_max = 256)
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#ifdef BFD_ARCH_SIZE
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/* EABI object attributes. */
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enum
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{
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/* 0-3 are generic. */
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Tag_CPU_raw_name = 4,
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Tag_CPU_name,
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Tag_CPU_arch,
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Tag_CPU_arch_profile,
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Tag_ARM_ISA_use,
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Tag_THUMB_ISA_use,
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Tag_FP_arch,
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Tag_WMMX_arch,
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Tag_Advanced_SIMD_arch,
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Tag_PCS_config,
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Tag_ABI_PCS_R9_use,
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Tag_ABI_PCS_RW_data,
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Tag_ABI_PCS_RO_data,
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Tag_ABI_PCS_GOT_use,
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Tag_ABI_PCS_wchar_t,
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Tag_ABI_FP_rounding,
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Tag_ABI_FP_denormal,
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Tag_ABI_FP_exceptions,
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Tag_ABI_FP_user_exceptions,
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Tag_ABI_FP_number_model,
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Tag_ABI_align_needed,
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Tag_ABI_align_preserved,
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Tag_ABI_enum_size,
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Tag_ABI_HardFP_use,
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Tag_ABI_VFP_args,
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Tag_ABI_WMMX_args,
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Tag_ABI_optimization_goals,
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Tag_ABI_FP_optimization_goals,
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/* 32 is generic (Tag_compatibility). */
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Tag_undefined33 = 33,
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Tag_CPU_unaligned_access,
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Tag_undefined35,
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Tag_FP_HP_extension,
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Tag_undefined37,
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Tag_ABI_FP_16bit_format,
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Tag_undefined39,
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Tag_undefined40,
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Tag_undefined41,
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Tag_MPextension_use,
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Tag_undefined_43,
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Tag_DIV_use,
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Tag_DSP_extension = 46,
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Tag_MVE_arch = 48,
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Tag_nodefaults = 64,
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Tag_also_compatible_with,
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Tag_T2EE_use,
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Tag_conformance,
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Tag_Virtualization_use,
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Tag_undefined69,
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Tag_MPextension_use_legacy,
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/* The following tags are legacy names for other tags. */
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Tag_VFP_arch = Tag_FP_arch,
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Tag_ABI_align8_needed = Tag_ABI_align_needed,
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Tag_ABI_align8_preserved = Tag_ABI_align_preserved,
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Tag_VFP_HP_extension = Tag_FP_HP_extension
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};
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/* Values for Tag_ABI_FP_number_model. */
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enum
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{
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AEABI_FP_number_model_none = 0,
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AEABI_FP_number_model_ieee754_number = 1,
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AEABI_FP_number_model_rtabi = 2,
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AEABI_FP_number_model_ieee754_all = 3
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};
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/* Values for Tag_ABI_VFP_args. */
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enum
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{
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AEABI_VFP_args_base = 0,
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AEABI_VFP_args_vfp = 1,
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AEABI_VFP_args_toolchain = 2,
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AEABI_VFP_args_compatible = 3
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};
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#endif
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/* The name of the note section used to identify arm variants. */
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#define ARM_NOTE_SECTION ".note.gnu.arm.ident"
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/* Special section names. */
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#define ELF_STRING_ARM_unwind ".ARM.exidx"
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#define ELF_STRING_ARM_unwind_info ".ARM.extab"
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#define ELF_STRING_ARM_unwind_once ".gnu.linkonce.armexidx."
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#define ELF_STRING_ARM_unwind_info_once ".gnu.linkonce.armextab."
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enum arm_st_branch_type {
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ST_BRANCH_TO_ARM,
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ST_BRANCH_TO_THUMB,
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ST_BRANCH_LONG,
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ST_BRANCH_UNKNOWN,
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ST_BRANCH_ENUM_SIZE
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};
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#define NUM_ENUM_ARM_ST_BRANCH_TYPE_BITS 2
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#define ENUM_ARM_ST_BRANCH_TYPE_BITMASK \
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((1 << NUM_ENUM_ARM_ST_BRANCH_TYPE_BITS) - 1)
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#define ARM_GET_SYM_BRANCH_TYPE(STI) \
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((enum arm_st_branch_type) ((STI) & ENUM_ARM_ST_BRANCH_TYPE_BITMASK))
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#ifdef BFD_ASSERT
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#define ARM_SET_SYM_BRANCH_TYPE(STI, TYPE) \
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do { \
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BFD_ASSERT (TYPE <= ST_BRANCH_ENUM_SIZE); \
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BFD_ASSERT ((1 << NUM_ENUM_ARM_ST_BRANCH_TYPE_BITS) \
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>= ST_BRANCH_ENUM_SIZE); \
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(STI) = (((STI) & ~ENUM_ARM_ST_BRANCH_TYPE_BITMASK) \
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| ((TYPE) & ENUM_ARM_ST_BRANCH_TYPE_BITMASK)); \
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} while (0)
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#else
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#define ARM_SET_SYM_BRANCH_TYPE(STI, TYPE) \
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(STI) = (((STI) & ~ENUM_ARM_ST_BRANCH_TYPE_BITMASK) \
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| ((TYPE) & ENUM_ARM_ST_BRANCH_TYPE_BITMASK))
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#endif
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#endif /* _ELF_ARM_H */
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