/* ARM ELF support for BFD.
- Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004
- Free Software Foundation, Inc.
+ 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 2 of the License, or
+ 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,
#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_HASENTRY 0x02
#define EF_ARM_INTERWORK 0x04
#define EF_ARM_APCS_26 0x08
#define EF_ARM_APCS_FLOAT 0x10
/* 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
+/* 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 STT_ARM_16BIT STT_HIPROC /* A Thumb label. */
/* Additional section types. */
-#define SHT_ARM_EXIDX 0x70000001 /* Section holds ARM unwind info. */
+#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_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 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)
RELOC_NUMBER (R_ARM_PC24, 1) /* deprecated */
RELOC_NUMBER (R_ARM_ABS32, 2)
RELOC_NUMBER (R_ARM_REL32, 3)
-#ifndef OLD_ARM_ABI
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_CALL, 10)
RELOC_NUMBER (R_ARM_THM_PC8, 11)
RELOC_NUMBER (R_ARM_BREL_ADJ, 12)
- RELOC_NUMBER (R_ARM_SWI24, 13) /* obsolete */
+ RELOC_NUMBER (R_ARM_TLS_DESC, 13)
RELOC_NUMBER (R_ARM_THM_SWI8, 14) /* obsolete */
-#else
- RELOC_NUMBER (R_ARM_ABS8, 4)
- RELOC_NUMBER (R_ARM_ABS16, 5)
- RELOC_NUMBER (R_ARM_ABS12, 6)
- RELOC_NUMBER (R_ARM_THM_ABS5, 7)
- RELOC_NUMBER (R_ARM_THM_CALL, 8)
- RELOC_NUMBER (R_ARM_SBREL32, 9)
- RELOC_NUMBER (R_ARM_BREL_ADJ, 10)
- RELOC_NUMBER (R_ARM_THM_JUMP11, 11)
- RELOC_NUMBER (R_ARM_THM_JUMP8, 12)
- RELOC_NUMBER (R_ARM_GNU_VTINHERIT, 13)
- RELOC_NUMBER (R_ARM_GNU_VTENTRY, 14)
-#endif
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_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_G0, 81)
- RELOC_NUMBER (R_ARM_LDC_G1, 82)
- RELOC_NUMBER (R_ARM_LDC_G2, 83)
+ 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)
- /* 90-93 unallocated */
+ 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)
-#ifndef OLD_ARM_ABI
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)
-#endif
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_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)
+ 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)
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. */
-#ifndef OLD_ARM_ABI
- FAKE_RELOC (R_ARM_PC13, R_ARM_LDR_PC_G0) /* Unclear whether meaning is different. */
+
+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
-END_RELOC_NUMBERS (R_ARM_max)
/* The name of the note section used to identify arm variants. */
#define ARM_NOTE_SECTION ".note.gnu.arm.ident"
#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 */
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