Home | History | Annotate | Line # | Download | only in elf
      1 /* ARM ELF support for BFD.
      2    Copyright (C) 1998-2025 Free Software Foundation, Inc.
      3 
      4    This file is part of BFD, the Binary File Descriptor library.
      5 
      6    This program is free software; you can redistribute it and/or modify
      7    it under the terms of the GNU General Public License as published by
      8    the Free Software Foundation; either version 3 of the License, or
      9    (at your option) any later version.
     10 
     11    This program is distributed in the hope that it will be useful,
     12    but WITHOUT ANY WARRANTY; without even the implied warranty of
     13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14    GNU General Public License for more details.
     15 
     16    You should have received a copy of the GNU General Public License
     17    along with this program; if not, write to the Free Software Foundation,
     18    Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
     19 
     20 #ifndef _ELF_ARM_H
     21 #define _ELF_ARM_H
     22 
     23 #include "elf/reloc-macros.h"
     24 
     25 /* Processor specific flags for the ELF header e_flags field.  */
     26 
     27 /* Old ABI (ie GNU pre EABI).  These are deprecated.  */
     28 #define EF_ARM_RELEXEC     0x01
     29 #define EF_ARM_INTERWORK   0x04
     30 #define EF_ARM_APCS_26     0x08
     31 #define EF_ARM_APCS_FLOAT  0x10
     32 #define EF_ARM_PIC         0x20
     33 #define EF_ARM_ALIGN8	   0x40		/* 8-bit structure alignment is in use.  */
     34 #define EF_ARM_NEW_ABI     0x80
     35 #define EF_ARM_OLD_ABI     0x100
     36 #define EF_ARM_SOFT_FLOAT  0x200
     37 #define EF_ARM_VFP_FLOAT   0x400
     38 /* Removed, was EF_ARM_MAVERICK_FLOAT 0x800  */
     39 
     40 #define PT_ARM_ARCHEXT (PT_LOPROC + 0)
     41 /* Frame unwind information */
     42 #define PT_ARM_EXIDX (PT_LOPROC + 1)
     43 
     44 /* Old ARM ELF spec. version B-01.  Mostly deprecated.  */
     45 #define EF_ARM_SYMSARESORTED 0x04	/* NB conflicts with EF_INTERWORK.  */
     46 #define EF_ARM_DYNSYMSUSESEGIDX 0x08	/* NB conflicts with EF_APCS26.  */
     47 #define EF_ARM_MAPSYMSFIRST 0x10	/* NB conflicts with EF_APCS_FLOAT.  */
     48 
     49 /* New constants defined in the ARM ELF spec. version XXX (AAELF).
     50    Only valid in conjunction with EF_ARM_EABI_VER5. */
     51 #define EF_ARM_ABI_FLOAT_SOFT 0x200	/* NB conflicts with EF_ARM_SOFT_FLOAT.  */
     52 #define EF_ARM_ABI_FLOAT_HARD 0x400	/* NB conflicts with EF_ARM_VFP_FLOAT.  */
     53 
     54 /* Constants defined in AAELF.  */
     55 #define EF_ARM_BE8	    0x00800000
     56 #define EF_ARM_LE8	    0x00400000
     57 
     58 #define EF_ARM_EABIMASK      0xFF000000
     59 #define EF_ARM_EABI_VERSION(flags) ((flags) & EF_ARM_EABIMASK)
     60 #define EF_ARM_EABI_UNKNOWN  0x00000000
     61 #define EF_ARM_EABI_VER1     0x01000000
     62 #define EF_ARM_EABI_VER2     0x02000000
     63 #define EF_ARM_EABI_VER3     0x03000000
     64 #define EF_ARM_EABI_VER4     0x04000000
     65 #define EF_ARM_EABI_VER5     0x05000000
     66 
     67 /* Local aliases for some flags to match names used by COFF port.  */
     68 #define F_INTERWORK	   EF_ARM_INTERWORK
     69 #define F_APCS26	   EF_ARM_APCS_26
     70 #define F_APCS_FLOAT	   EF_ARM_APCS_FLOAT
     71 #define F_PIC              EF_ARM_PIC
     72 #define F_SOFT_FLOAT	   EF_ARM_SOFT_FLOAT
     73 #define F_VFP_FLOAT	   EF_ARM_VFP_FLOAT
     74 
     75 /* Additional symbol types for Thumb.  */
     76 #define STT_ARM_TFUNC      STT_LOPROC   /* A Thumb function.  */
     77 #define STT_ARM_16BIT      STT_HIPROC   /* A Thumb label.  */
     78 
     79 /* Additional section types.  */
     80 #define SHT_ARM_EXIDX	       (SHT_LOPROC + 1)	/* Section holds ARM unwind info.  */
     81 #define SHT_ARM_PREEMPTMAP     (SHT_LOPROC + 2)	/* Section pre-emption details.  */
     82 #define SHT_ARM_ATTRIBUTES     (SHT_LOPROC + 3) /* Section holds attributes.  */
     83 #define SHT_ARM_DEBUGOVERLAY   (SHT_LOPROC + 4)	/* Section holds overlay debug info.  */
     84 #define SHT_ARM_OVERLAYSECTION (SHT_LOPROC + 5)	/* Section holds GDB and overlay integration info.  */
     85 
     86 /* ARM-specific values for sh_flags.  */
     87 #define SHF_ENTRYSECT      0x10000000   /* Section contains an entry point.  */
     88 #define SHF_ARM_PURECODE   0x20000000   /* Section contains only code and no data.  */
     89 #define SHF_COMDEF         0x80000000   /* Section may be multiply defined in the input to a link step.  */
     90 
     91 /* ARM-specific program header flags.  */
     92 #define PF_ARM_SB          0x10000000   /* Segment contains the location addressed by the static base.  */
     93 #define PF_ARM_PI          0x20000000   /* Segment is position-independent.  */
     94 #define PF_ARM_ABS         0x40000000   /* Segment must be loaded at its base address.  */
     95 
     96 /* Values for the Tag_CPU_arch EABI attribute.  */
     97 #define TAG_CPU_ARCH_PRE_V4	0
     98 #define TAG_CPU_ARCH_V4		1
     99 #define TAG_CPU_ARCH_V4T	2
    100 #define TAG_CPU_ARCH_V5T	3
    101 #define TAG_CPU_ARCH_V5TE	4
    102 #define TAG_CPU_ARCH_V5TEJ	5
    103 #define TAG_CPU_ARCH_V6		6
    104 #define TAG_CPU_ARCH_V6KZ	7
    105 #define TAG_CPU_ARCH_V6T2	8
    106 #define TAG_CPU_ARCH_V6K	9
    107 #define TAG_CPU_ARCH_V7		10
    108 #define TAG_CPU_ARCH_V6_M	11
    109 #define TAG_CPU_ARCH_V6S_M	12
    110 #define TAG_CPU_ARCH_V7E_M	13
    111 #define TAG_CPU_ARCH_V8		14
    112 #define TAG_CPU_ARCH_V8R	15
    113 #define TAG_CPU_ARCH_V8M_BASE	16
    114 #define TAG_CPU_ARCH_V8M_MAIN	17
    115 #define TAG_CPU_ARCH_8_1A       18
    116 #define TAG_CPU_ARCH_8_2A       19
    117 #define TAG_CPU_ARCH_8_3A       20
    118 #define TAG_CPU_ARCH_V8_1M_MAIN 21
    119 #define TAG_CPU_ARCH_V9         22
    120 #define MAX_TAG_CPU_ARCH	TAG_CPU_ARCH_V9
    121 /* Pseudo-architecture to allow objects to be compatible with the subset of
    122    armv4t and armv6-m.  This value should never be stored in object files.  */
    123 #define TAG_CPU_ARCH_V4T_PLUS_V6_M (MAX_TAG_CPU_ARCH + 1)
    124 
    125 /* Relocation types.  */
    126 
    127 START_RELOC_NUMBERS (elf_arm_reloc_type)
    128 /* AAELF official names and numbers.  */
    129   RELOC_NUMBER (R_ARM_NONE,            	  0)
    130   RELOC_NUMBER (R_ARM_PC24,            	  1)   /* deprecated */
    131   RELOC_NUMBER (R_ARM_ABS32,           	  2)
    132   RELOC_NUMBER (R_ARM_REL32,           	  3)
    133   RELOC_NUMBER (R_ARM_LDR_PC_G0,       	  4)
    134   RELOC_NUMBER (R_ARM_ABS16,           	  5)
    135   RELOC_NUMBER (R_ARM_ABS12,           	  6)
    136   RELOC_NUMBER (R_ARM_THM_ABS5,        	  7)
    137   RELOC_NUMBER (R_ARM_ABS8,            	  8)
    138   RELOC_NUMBER (R_ARM_SBREL32,         	  9)
    139   RELOC_NUMBER (R_ARM_THM_CALL,        	 10)
    140   RELOC_NUMBER (R_ARM_THM_PC8,         	 11)
    141   RELOC_NUMBER (R_ARM_BREL_ADJ,	       	 12)
    142   RELOC_NUMBER (R_ARM_TLS_DESC,          13)
    143   RELOC_NUMBER (R_ARM_THM_SWI8,        	 14)   /* obsolete */
    144   RELOC_NUMBER (R_ARM_XPC25,           	 15)   /* obsolete */
    145   RELOC_NUMBER (R_ARM_THM_XPC22,       	 16)   /* obsolete */
    146   RELOC_NUMBER (R_ARM_TLS_DTPMOD32,    	 17)
    147   RELOC_NUMBER (R_ARM_TLS_DTPOFF32,    	 18)
    148   RELOC_NUMBER (R_ARM_TLS_TPOFF32,     	 19)
    149   RELOC_NUMBER (R_ARM_COPY,            	 20)   /* Copy symbol at runtime.  */
    150   RELOC_NUMBER (R_ARM_GLOB_DAT,        	 21)   /* Create GOT entry.  */
    151   RELOC_NUMBER (R_ARM_JUMP_SLOT,       	 22)   /* Create PLT entry.  */
    152   RELOC_NUMBER (R_ARM_RELATIVE,        	 23)   /* Adjust by program base.  */
    153   RELOC_NUMBER (R_ARM_GOTOFF32,        	 24)   /* 32 bit offset to GOT.  */
    154   RELOC_NUMBER (R_ARM_BASE_PREL,       	 25)   /* 32 bit PC relative offset to GOT.  */
    155   RELOC_NUMBER (R_ARM_GOT_BREL,        	 26)   /* 32 bit GOT entry.  */
    156   RELOC_NUMBER (R_ARM_PLT32,           	 27)   /* deprecated - 32 bit PLT address.  */
    157   RELOC_NUMBER (R_ARM_CALL,            	 28)
    158   RELOC_NUMBER (R_ARM_JUMP24,          	 29)
    159   RELOC_NUMBER (R_ARM_THM_JUMP24,      	 30)
    160   RELOC_NUMBER (R_ARM_BASE_ABS,        	 31)
    161   RELOC_NUMBER (R_ARM_ALU_PCREL7_0,    	 32)   /* obsolete */
    162   RELOC_NUMBER (R_ARM_ALU_PCREL15_8,   	 33)   /* obsolete */
    163   RELOC_NUMBER (R_ARM_ALU_PCREL23_15,  	 34)   /* obsolete */
    164   RELOC_NUMBER (R_ARM_LDR_SBREL_11_0,  	 35)   /* deprecated, should have _NC suffix */
    165   RELOC_NUMBER (R_ARM_ALU_SBREL_19_12, 	 36)   /* deprecated, should have _NC suffix */
    166   RELOC_NUMBER (R_ARM_ALU_SBREL_27_20, 	 37)   /* deprecated, should have _CK suffix */
    167   RELOC_NUMBER (R_ARM_TARGET1,         	 38)
    168   RELOC_NUMBER (R_ARM_SBREL31,         	 39)   /* deprecated */
    169   RELOC_NUMBER (R_ARM_V4BX,            	 40)
    170   RELOC_NUMBER (R_ARM_TARGET2,	       	 41)
    171   RELOC_NUMBER (R_ARM_PREL31,	       	 42)
    172   RELOC_NUMBER (R_ARM_MOVW_ABS_NC,     	 43)
    173   RELOC_NUMBER (R_ARM_MOVT_ABS,        	 44)
    174   RELOC_NUMBER (R_ARM_MOVW_PREL_NC,    	 45)
    175   RELOC_NUMBER (R_ARM_MOVT_PREL,       	 46)
    176   RELOC_NUMBER (R_ARM_THM_MOVW_ABS_NC, 	 47)
    177   RELOC_NUMBER (R_ARM_THM_MOVT_ABS,    	 48)
    178   RELOC_NUMBER (R_ARM_THM_MOVW_PREL_NC,	 49)
    179   RELOC_NUMBER (R_ARM_THM_MOVT_PREL,   	 50)
    180   RELOC_NUMBER (R_ARM_THM_JUMP19,      	 51)
    181   RELOC_NUMBER (R_ARM_THM_JUMP6,       	 52)
    182   RELOC_NUMBER (R_ARM_THM_ALU_PREL_11_0, 53)
    183   RELOC_NUMBER (R_ARM_THM_PC12,        	 54)
    184   RELOC_NUMBER (R_ARM_ABS32_NOI,       	 55)
    185   RELOC_NUMBER (R_ARM_REL32_NOI,       	 56)
    186   RELOC_NUMBER (R_ARM_ALU_PC_G0_NC,      57)
    187   RELOC_NUMBER (R_ARM_ALU_PC_G0,         58)
    188   RELOC_NUMBER (R_ARM_ALU_PC_G1_NC,      59)
    189   RELOC_NUMBER (R_ARM_ALU_PC_G1,         60)
    190   RELOC_NUMBER (R_ARM_ALU_PC_G2,         61)
    191   RELOC_NUMBER (R_ARM_LDR_PC_G1,         62)
    192   RELOC_NUMBER (R_ARM_LDR_PC_G2,         63)
    193   RELOC_NUMBER (R_ARM_LDRS_PC_G0,        64)
    194   RELOC_NUMBER (R_ARM_LDRS_PC_G1,        65)
    195   RELOC_NUMBER (R_ARM_LDRS_PC_G2,        66)
    196   RELOC_NUMBER (R_ARM_LDC_PC_G0,         67)
    197   RELOC_NUMBER (R_ARM_LDC_PC_G1,         68)
    198   RELOC_NUMBER (R_ARM_LDC_PC_G2,         69)
    199   RELOC_NUMBER (R_ARM_ALU_SB_G0_NC,      70)
    200   RELOC_NUMBER (R_ARM_ALU_SB_G0,         71)
    201   RELOC_NUMBER (R_ARM_ALU_SB_G1_NC,      72)
    202   RELOC_NUMBER (R_ARM_ALU_SB_G1,         73)
    203   RELOC_NUMBER (R_ARM_ALU_SB_G2,         74)
    204   RELOC_NUMBER (R_ARM_LDR_SB_G0,         75)
    205   RELOC_NUMBER (R_ARM_LDR_SB_G1,         76)
    206   RELOC_NUMBER (R_ARM_LDR_SB_G2,         77)
    207   RELOC_NUMBER (R_ARM_LDRS_SB_G0,        78)
    208   RELOC_NUMBER (R_ARM_LDRS_SB_G1,        79)
    209   RELOC_NUMBER (R_ARM_LDRS_SB_G2,        80)
    210   RELOC_NUMBER (R_ARM_LDC_SB_G0,         81)
    211   RELOC_NUMBER (R_ARM_LDC_SB_G1,         82)
    212   RELOC_NUMBER (R_ARM_LDC_SB_G2,         83)
    213   RELOC_NUMBER (R_ARM_MOVW_BREL_NC,    	 84)
    214   RELOC_NUMBER (R_ARM_MOVT_BREL,       	 85)
    215   RELOC_NUMBER (R_ARM_MOVW_BREL,       	 86)
    216   RELOC_NUMBER (R_ARM_THM_MOVW_BREL_NC,	 87)
    217   RELOC_NUMBER (R_ARM_THM_MOVT_BREL,   	 88)
    218   RELOC_NUMBER (R_ARM_THM_MOVW_BREL,   	 89)
    219   RELOC_NUMBER (R_ARM_TLS_GOTDESC,       90)
    220   RELOC_NUMBER (R_ARM_TLS_CALL,          91)
    221   RELOC_NUMBER (R_ARM_TLS_DESCSEQ,       92)
    222   RELOC_NUMBER (R_ARM_THM_TLS_CALL,      93)
    223   RELOC_NUMBER (R_ARM_PLT32_ABS,       	 94)
    224   RELOC_NUMBER (R_ARM_GOT_ABS,	       	 95)
    225   RELOC_NUMBER (R_ARM_GOT_PREL,	       	 96)
    226   RELOC_NUMBER (R_ARM_GOT_BREL12,      	 97)
    227   RELOC_NUMBER (R_ARM_GOTOFF12,	       	 98)
    228   RELOC_NUMBER (R_ARM_GOTRELAX,	       	 99)
    229   RELOC_NUMBER (R_ARM_GNU_VTENTRY,    	100)   /* deprecated - old C++ abi */
    230   RELOC_NUMBER (R_ARM_GNU_VTINHERIT,  	101)   /* deprecated - old C++ abi */
    231   RELOC_NUMBER (R_ARM_THM_JUMP11,     	102)
    232   RELOC_NUMBER (R_ARM_THM_JUMP8,      	103)
    233   RELOC_NUMBER (R_ARM_TLS_GD32,	      	104)
    234   RELOC_NUMBER (R_ARM_TLS_LDM32,      	105)
    235   RELOC_NUMBER (R_ARM_TLS_LDO32,      	106)
    236   RELOC_NUMBER (R_ARM_TLS_IE32,       	107)
    237   RELOC_NUMBER (R_ARM_TLS_LE32,	      	108)
    238   RELOC_NUMBER (R_ARM_TLS_LDO12,      	109)
    239   RELOC_NUMBER (R_ARM_TLS_LE12,	      	110)
    240   RELOC_NUMBER (R_ARM_TLS_IE12GP,     	111)
    241   /* 112 - 127 private range */
    242   RELOC_NUMBER (R_ARM_ME_TOO,	        128)   /* obsolete */
    243   RELOC_NUMBER (R_ARM_THM_TLS_DESCSEQ  ,129)
    244 
    245   RELOC_NUMBER (R_ARM_THM_ALU_ABS_G0_NC,132)
    246   RELOC_NUMBER (R_ARM_THM_ALU_ABS_G1_NC,133)
    247   RELOC_NUMBER (R_ARM_THM_ALU_ABS_G2_NC,134)
    248   RELOC_NUMBER (R_ARM_THM_ALU_ABS_G3_NC,135)
    249   RELOC_NUMBER (R_ARM_THM_BF16,		136)
    250   RELOC_NUMBER (R_ARM_THM_BF12,		137)
    251   RELOC_NUMBER (R_ARM_THM_BF18,		138)
    252 
    253   RELOC_NUMBER (R_ARM_IRELATIVE,      	160)
    254   RELOC_NUMBER (R_ARM_GOTFUNCDESC,    	161)
    255   RELOC_NUMBER (R_ARM_GOTOFFFUNCDESC, 	162)
    256   RELOC_NUMBER (R_ARM_FUNCDESC,       	163)
    257   RELOC_NUMBER (R_ARM_FUNCDESC_VALUE, 	164)
    258   RELOC_NUMBER (R_ARM_TLS_GD32_FDPIC,   165)
    259   RELOC_NUMBER (R_ARM_TLS_LDM32_FDPIC,  166)
    260   RELOC_NUMBER (R_ARM_TLS_IE32_FDPIC,   167)
    261 
    262   /* Extensions?  R=read-only?  */
    263   RELOC_NUMBER (R_ARM_RXPC25,         	249)
    264   RELOC_NUMBER (R_ARM_RSBREL32,       	250)
    265   RELOC_NUMBER (R_ARM_THM_RPC22,      	251)
    266   RELOC_NUMBER (R_ARM_RREL32,         	252)
    267   RELOC_NUMBER (R_ARM_RABS32,         	253)
    268   RELOC_NUMBER (R_ARM_RPC24,          	254)
    269   RELOC_NUMBER (R_ARM_RBASE,          	255)
    270 
    271   /* Unofficial names for some of the relocs.  */
    272   FAKE_RELOC (R_ARM_GOTOFF,             R_ARM_GOTOFF32)   /* 32 bit offset to GOT.  */
    273   FAKE_RELOC (R_ARM_THM_PC22,           R_ARM_THM_CALL)
    274   FAKE_RELOC (R_ARM_THM_PC11,           R_ARM_THM_JUMP11)
    275   FAKE_RELOC (R_ARM_THM_PC9,            R_ARM_THM_JUMP8)
    276 
    277   /* Relocs with both a different name, and (apparently) different meaning in
    278      GNU usage.  */
    279   FAKE_RELOC (R_ARM_GOTPC,              R_ARM_BASE_PREL)  /* 32 bit PC relative offset to GOT.  */
    280   FAKE_RELOC (R_ARM_GOT32,              R_ARM_GOT_BREL)   /* 32 bit GOT entry.  */
    281   FAKE_RELOC (R_ARM_ROSEGREL32,         R_ARM_SBREL31)    /* ??? */
    282   FAKE_RELOC (R_ARM_AMP_VCALL9,         R_ARM_BREL_ADJ)   /* Thumb-something.  Not used.  */
    283 
    284 END_RELOC_NUMBERS (R_ARM_max = 256)
    285 
    286 #ifdef BFD_ARCH_SIZE
    287 /* EABI object attributes.  */
    288 
    289 enum
    290 {
    291   /* 0-3 are generic.  */
    292   Tag_CPU_raw_name = 4,
    293   Tag_CPU_name,
    294   Tag_CPU_arch,
    295   Tag_CPU_arch_profile,
    296   Tag_ARM_ISA_use,
    297   Tag_THUMB_ISA_use,
    298   Tag_FP_arch,
    299   Tag_WMMX_arch,
    300   Tag_Advanced_SIMD_arch,
    301   Tag_PCS_config,
    302   Tag_ABI_PCS_R9_use,
    303   Tag_ABI_PCS_RW_data,
    304   Tag_ABI_PCS_RO_data,
    305   Tag_ABI_PCS_GOT_use,
    306   Tag_ABI_PCS_wchar_t,
    307   Tag_ABI_FP_rounding,
    308   Tag_ABI_FP_denormal,
    309   Tag_ABI_FP_exceptions,
    310   Tag_ABI_FP_user_exceptions,
    311   Tag_ABI_FP_number_model,
    312   Tag_ABI_align_needed,
    313   Tag_ABI_align_preserved,
    314   Tag_ABI_enum_size,
    315   Tag_ABI_HardFP_use,
    316   Tag_ABI_VFP_args,
    317   Tag_ABI_WMMX_args,
    318   Tag_ABI_optimization_goals,
    319   Tag_ABI_FP_optimization_goals,
    320   /* 32 is generic (Tag_compatibility).  */
    321   Tag_undefined33 = 33,
    322   Tag_CPU_unaligned_access,
    323   Tag_undefined35,
    324   Tag_FP_HP_extension,
    325   Tag_undefined37,
    326   Tag_ABI_FP_16bit_format,
    327   Tag_undefined39,
    328   Tag_undefined40,
    329   Tag_undefined41,
    330   Tag_MPextension_use,
    331   Tag_undefined_43,
    332   Tag_DIV_use,
    333   Tag_DSP_extension = 46,
    334   Tag_MVE_arch = 48,
    335   Tag_PAC_extension = 50,
    336   Tag_BTI_extension = 52,
    337   Tag_BTI_use = 74,
    338   Tag_PACRET_use = 76,
    339   Tag_nodefaults = 64,
    340   Tag_also_compatible_with,
    341   Tag_T2EE_use,
    342   Tag_conformance,
    343   Tag_Virtualization_use,
    344   Tag_undefined69,
    345   Tag_MPextension_use_legacy,
    346 
    347   /* The following tags are legacy names for other tags.  */
    348   Tag_VFP_arch = Tag_FP_arch,
    349   Tag_ABI_align8_needed = Tag_ABI_align_needed,
    350   Tag_ABI_align8_preserved = Tag_ABI_align_preserved,
    351   Tag_VFP_HP_extension = Tag_FP_HP_extension
    352 };
    353 
    354 /* Values for Tag_ABI_FP_number_model.  */
    355 enum
    356 {
    357   AEABI_FP_number_model_none = 0,
    358   AEABI_FP_number_model_ieee754_number = 1,
    359   AEABI_FP_number_model_rtabi = 2,
    360   AEABI_FP_number_model_ieee754_all = 3
    361 };
    362 
    363 /* Values for Tag_ABI_VFP_args.  */
    364 enum
    365 {
    366   AEABI_VFP_args_base = 0,
    367   AEABI_VFP_args_vfp = 1,
    368   AEABI_VFP_args_toolchain = 2,
    369   AEABI_VFP_args_compatible = 3
    370 };
    371 #endif
    372 
    373 /* The name of the note section used to identify arm variants.  */
    374 #define ARM_NOTE_SECTION ".note.gnu.arm.ident"
    375 
    376 /* Special section names.  */
    377 #define ELF_STRING_ARM_unwind           ".ARM.exidx"
    378 #define ELF_STRING_ARM_unwind_info      ".ARM.extab"
    379 #define ELF_STRING_ARM_unwind_once      ".gnu.linkonce.armexidx."
    380 #define ELF_STRING_ARM_unwind_info_once ".gnu.linkonce.armextab."
    381 
    382 enum arm_st_branch_type {
    383   ST_BRANCH_TO_ARM,
    384   ST_BRANCH_TO_THUMB,
    385   ST_BRANCH_LONG,
    386   ST_BRANCH_UNKNOWN,
    387   ST_BRANCH_ENUM_SIZE
    388 };
    389 
    390 #define NUM_ENUM_ARM_ST_BRANCH_TYPE_BITS 2
    391 #define ENUM_ARM_ST_BRANCH_TYPE_BITMASK	\
    392   ((1 << NUM_ENUM_ARM_ST_BRANCH_TYPE_BITS) - 1)
    393 
    394 #define ARM_GET_SYM_BRANCH_TYPE(STI) \
    395   ((enum arm_st_branch_type) ((STI) & ENUM_ARM_ST_BRANCH_TYPE_BITMASK))
    396 #ifdef BFD_ASSERT
    397 #define ARM_SET_SYM_BRANCH_TYPE(STI, TYPE)			\
    398   do {								\
    399     BFD_ASSERT (TYPE <= ST_BRANCH_ENUM_SIZE);			\
    400     BFD_ASSERT ((1 << NUM_ENUM_ARM_ST_BRANCH_TYPE_BITS)		\
    401 		>= ST_BRANCH_ENUM_SIZE);			\
    402     (STI) = (((STI) & ~ENUM_ARM_ST_BRANCH_TYPE_BITMASK)		\
    403 	     | ((TYPE) & ENUM_ARM_ST_BRANCH_TYPE_BITMASK));	\
    404   } while (0)
    405 #else
    406 #define ARM_SET_SYM_BRANCH_TYPE(STI, TYPE)			\
    407   (STI) = (((STI) & ~ENUM_ARM_ST_BRANCH_TYPE_BITMASK)		\
    408 	   | ((TYPE) & ENUM_ARM_ST_BRANCH_TYPE_BITMASK))
    409 #endif
    410 
    411 #endif /* _ELF_ARM_H */
    412