include/elf/arm.h

   1 /* ARM ELF support for BFD.
   2    Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004
   3    Free Software Foundation, Inc.
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software Foundation,
  19    Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  20
  21 #ifndef _ELF_ARM_H
  22 #define _ELF_ARM_H
  23
  24 #include "elf/reloc-macros.h"
  25
  26 /* Processor specific flags for the ELF header e_flags field.  */
  27 #define EF_ARM_RELEXEC     0x01
  28 #define EF_ARM_HASENTRY    0x02
  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 #define EF_ARM_MAVERICK_FLOAT 0x800
  39
  40 /* Frame unwind information */
  41 #define PT_ARM_EXIDX (PT_LOPROC + 1)
  42
  43 /* Other constants defined in the ARM ELF spec. version B-01.  */
  44 #define EF_ARM_SYMSARESORTED 0x04       /* NB conflicts with EF_INTERWORK */
  45 #define EF_ARM_DYNSYMSUSESEGIDX 0x08    /* NB conflicts with EF_APCS26 */
  46 #define EF_ARM_MAPSYMSFIRST 0x10        /* NB conflicts with EF_APCS_FLOAT */
  47 #define EF_ARM_EABIMASK      0xFF000000
  48
  49 /* Constants defined in AAELF.  */
  50 #define EF_ARM_BE8          0x00800000
  51 #define EF_ARM_LE8          0x00400000
  52
  53 #define EF_ARM_EABI_VERSION(flags) ((flags) & EF_ARM_EABIMASK)
  54 #define EF_ARM_EABI_UNKNOWN  0x00000000
  55 #define EF_ARM_EABI_VER1     0x01000000
  56 #define EF_ARM_EABI_VER2     0x02000000
  57 #define EF_ARM_EABI_VER3     0x03000000
  58 #define EF_ARM_EABI_VER4     0x04000000
  59 #define EF_ARM_EABI_VER5     0x05000000
  60
  61 /* Local aliases for some flags to match names used by COFF port.  */
  62 #define F_INTERWORK        EF_ARM_INTERWORK
  63 #define F_APCS26           EF_ARM_APCS_26
  64 #define F_APCS_FLOAT       EF_ARM_APCS_FLOAT
  65 #define F_PIC              EF_ARM_PIC
  66 #define F_SOFT_FLOAT       EF_ARM_SOFT_FLOAT
  67 #define F_VFP_FLOAT        EF_ARM_VFP_FLOAT
  68
  69 /* Additional symbol types for Thumb.  */
  70 #define STT_ARM_TFUNC      STT_LOPROC   /* A Thumb function.  */
  71 #define STT_ARM_16BIT      STT_HIPROC   /* A Thumb label.  */
  72
  73 /* Additional section types.  */
  74 #define SHT_ARM_EXIDX      0x70000001   /* Section holds ARM unwind info.  */
  75 #define SHT_ARM_PREEMPTMAP 0x70000002   /* Section pre-emption details.  */
  76 #define SHT_ARM_ATTRIBUTES 0x70000003   /* Section holds attributes.  */
  77
  78 /* ARM-specific values for sh_flags.  */
  79 #define SHF_ENTRYSECT      0x10000000   /* Section contains an entry point.  */
  80 #define SHF_COMDEF         0x80000000   /* Section may be multiply defined in the input to a link step.  */
  81
  82 /* ARM-specific program header flags.  */
  83 #define PF_ARM_SB          0x10000000   /* Segment contains the location addressed by the static base.  */
  84 #define PF_ARM_PI          0x20000000   /* Segment is position-independent.  */
  85 #define PF_ARM_ABS         0x40000000   /* Segment must be loaded at its base address.  */
  86
  87 /* Values for the Tag_CPU_arch EABI attribute.  */
  88 #define TAG_CPU_ARCH_PRE_V4    0
  89 #define TAG_CPU_ARCH_V4                1
  90 #define TAG_CPU_ARCH_V4T       2
  91 #define TAG_CPU_ARCH_V5T       3
  92 #define TAG_CPU_ARCH_V5TE      4
  93 #define TAG_CPU_ARCH_V5TEJ     5
  94 #define TAG_CPU_ARCH_V6                6
  95 #define TAG_CPU_ARCH_V6KZ      7
  96 #define TAG_CPU_ARCH_V6T2      8
  97 #define TAG_CPU_ARCH_V6K       9
  98 #define TAG_CPU_ARCH_V7                10
  99
 100 /* Relocation types.  */
 101
 102 START_RELOC_NUMBERS (elf_arm_reloc_type)
 103 /* AAELF official names and numbers.  */
 104   RELOC_NUMBER (R_ARM_NONE,               0)
 105   RELOC_NUMBER (R_ARM_PC24,               1)   /* deprecated */
 106   RELOC_NUMBER (R_ARM_ABS32,              2)
 107   RELOC_NUMBER (R_ARM_REL32,              3)
 108   RELOC_NUMBER (R_ARM_LDR_PC_G0,          4)
 109   RELOC_NUMBER (R_ARM_ABS16,              5)
 110   RELOC_NUMBER (R_ARM_ABS12,              6)
 111   RELOC_NUMBER (R_ARM_THM_ABS5,           7)
 112   RELOC_NUMBER (R_ARM_ABS8,               8)
 113   RELOC_NUMBER (R_ARM_SBREL32,            9)
 114   RELOC_NUMBER (R_ARM_THM_CALL,          10)
 115   RELOC_NUMBER (R_ARM_THM_PC8,           11)
 116   RELOC_NUMBER (R_ARM_BREL_ADJ,          12)
 117   RELOC_NUMBER (R_ARM_SWI24,             13)   /* obsolete */
 118   RELOC_NUMBER (R_ARM_THM_SWI8,          14)   /* obsolete */
 119   RELOC_NUMBER (R_ARM_XPC25,             15)   /* obsolete */
 120   RELOC_NUMBER (R_ARM_THM_XPC22,         16)   /* obsolete */
 121   RELOC_NUMBER (R_ARM_TLS_DTPMOD32,      17)
 122   RELOC_NUMBER (R_ARM_TLS_DTPOFF32,      18)
 123   RELOC_NUMBER (R_ARM_TLS_TPOFF32,       19)
 124   RELOC_NUMBER (R_ARM_COPY,              20)   /* Copy symbol at runtime.  */
 125   RELOC_NUMBER (R_ARM_GLOB_DAT,          21)   /* Create GOT entry.  */
 126   RELOC_NUMBER (R_ARM_JUMP_SLOT,         22)   /* Create PLT entry.  */
 127   RELOC_NUMBER (R_ARM_RELATIVE,          23)   /* Adjust by program base.  */
 128   RELOC_NUMBER (R_ARM_GOTOFF32,          24)   /* 32 bit offset to GOT.  */
 129   RELOC_NUMBER (R_ARM_BASE_PREL,         25)   /* 32 bit PC relative offset to GOT.  */
 130   RELOC_NUMBER (R_ARM_GOT_BREL,          26)   /* 32 bit GOT entry.  */
 131   RELOC_NUMBER (R_ARM_PLT32,             27)   /* deprecated - 32 bit PLT address.  */
 132   RELOC_NUMBER (R_ARM_CALL,              28)
 133   RELOC_NUMBER (R_ARM_JUMP24,            29)
 134   RELOC_NUMBER (R_ARM_THM_JUMP24,        30)
 135   RELOC_NUMBER (R_ARM_BASE_ABS,          31)
 136   RELOC_NUMBER (R_ARM_ALU_PCREL7_0,      32)   /* obsolete */
 137   RELOC_NUMBER (R_ARM_ALU_PCREL15_8,     33)   /* obsolete */
 138   RELOC_NUMBER (R_ARM_ALU_PCREL23_15,    34)   /* obsolete */
 139   RELOC_NUMBER (R_ARM_LDR_SBREL_11_0,    35)   /* deprecated, should have _NC suffix */
 140   RELOC_NUMBER (R_ARM_ALU_SBREL_19_12,   36)   /* deprecated, should have _NC suffix */
 141   RELOC_NUMBER (R_ARM_ALU_SBREL_27_20,   37)   /* deprecated, should have _CK suffix */
 142   RELOC_NUMBER (R_ARM_TARGET1,           38)
 143   RELOC_NUMBER (R_ARM_SBREL31,           39)   /* deprecated */
 144   RELOC_NUMBER (R_ARM_V4BX,              40)
 145   RELOC_NUMBER (R_ARM_TARGET2,           41)
 146   RELOC_NUMBER (R_ARM_PREL31,            42)
 147   RELOC_NUMBER (R_ARM_MOVW_ABS_NC,       43)
 148   RELOC_NUMBER (R_ARM_MOVT_ABS,          44)
 149   RELOC_NUMBER (R_ARM_MOVW_PREL_NC,      45)
 150   RELOC_NUMBER (R_ARM_MOVT_PREL,         46)
 151   RELOC_NUMBER (R_ARM_THM_MOVW_ABS_NC,   47)
 152   RELOC_NUMBER (R_ARM_THM_MOVT_ABS,      48)
 153   RELOC_NUMBER (R_ARM_THM_MOVW_PREL_NC,  49)
 154   RELOC_NUMBER (R_ARM_THM_MOVT_PREL,     50)
 155   RELOC_NUMBER (R_ARM_THM_JUMP19,        51)
 156   RELOC_NUMBER (R_ARM_THM_JUMP6,         52)
 157   RELOC_NUMBER (R_ARM_THM_ALU_PREL_11_0, 53)
 158   RELOC_NUMBER (R_ARM_THM_PC12,          54)
 159   RELOC_NUMBER (R_ARM_ABS32_NOI,         55)
 160   RELOC_NUMBER (R_ARM_REL32_NOI,         56)
 161   RELOC_NUMBER (R_ARM_ALU_PC_G0_NC,      57)
 162   RELOC_NUMBER (R_ARM_ALU_PC_G0,         58)
 163   RELOC_NUMBER (R_ARM_ALU_PC_G1_NC,      59)
 164   RELOC_NUMBER (R_ARM_ALU_PC_G1,         60)
 165   RELOC_NUMBER (R_ARM_ALU_PC_G2,         61)
 166   RELOC_NUMBER (R_ARM_LDR_PC_G1,         62)
 167   RELOC_NUMBER (R_ARM_LDR_PC_G2,         63)
 168   RELOC_NUMBER (R_ARM_LDRS_PC_G0,        64)
 169   RELOC_NUMBER (R_ARM_LDRS_PC_G1,        65)
 170   RELOC_NUMBER (R_ARM_LDRS_PC_G2,        66)
 171   RELOC_NUMBER (R_ARM_LDC_PC_G0,         67)
 172   RELOC_NUMBER (R_ARM_LDC_PC_G1,         68)
 173   RELOC_NUMBER (R_ARM_LDC_PC_G2,         69)
 174   RELOC_NUMBER (R_ARM_ALU_SB_G0_NC,      70)
 175   RELOC_NUMBER (R_ARM_ALU_SB_G0,         71)
 176   RELOC_NUMBER (R_ARM_ALU_SB_G1_NC,      72)
 177   RELOC_NUMBER (R_ARM_ALU_SB_G1,         73)
 178   RELOC_NUMBER (R_ARM_ALU_SB_G2,         74)
 179   RELOC_NUMBER (R_ARM_LDR_SB_G0,         75)
 180   RELOC_NUMBER (R_ARM_LDR_SB_G1,         76)
 181   RELOC_NUMBER (R_ARM_LDR_SB_G2,         77)
 182   RELOC_NUMBER (R_ARM_LDRS_SB_G0,        78)
 183   RELOC_NUMBER (R_ARM_LDRS_SB_G1,        79)
 184   RELOC_NUMBER (R_ARM_LDRS_SB_G2,        80)
 185   RELOC_NUMBER (R_ARM_LDC_SB_G0,         81)
 186   RELOC_NUMBER (R_ARM_LDC_SB_G1,         82)
 187   RELOC_NUMBER (R_ARM_LDC_SB_G2,         83)
 188   RELOC_NUMBER (R_ARM_MOVW_BREL_NC,      84)
 189   RELOC_NUMBER (R_ARM_MOVT_BREL,         85)
 190   RELOC_NUMBER (R_ARM_MOVW_BREL,         86)
 191   RELOC_NUMBER (R_ARM_THM_MOVW_BREL_NC,  87)
 192   RELOC_NUMBER (R_ARM_THM_MOVT_BREL,     88)
 193   RELOC_NUMBER (R_ARM_THM_MOVW_BREL,     89)
 194   /* 90-93 unallocated */
 195   RELOC_NUMBER (R_ARM_PLT32_ABS,         94)
 196   RELOC_NUMBER (R_ARM_GOT_ABS,           95)
 197   RELOC_NUMBER (R_ARM_GOT_PREL,          96)
 198   RELOC_NUMBER (R_ARM_GOT_BREL12,        97)
 199   RELOC_NUMBER (R_ARM_GOTOFF12,          98)
 200   RELOC_NUMBER (R_ARM_GOTRELAX,          99)
 201   RELOC_NUMBER (R_ARM_GNU_VTENTRY,      100)   /* deprecated - old C++ abi */
 202   RELOC_NUMBER (R_ARM_GNU_VTINHERIT,    101)   /* deprecated - old C++ abi */
 203   RELOC_NUMBER (R_ARM_THM_JUMP11,       102)
 204   RELOC_NUMBER (R_ARM_THM_JUMP8,        103)
 205   RELOC_NUMBER (R_ARM_TLS_GD32,         104)
 206   RELOC_NUMBER (R_ARM_TLS_LDM32,        105)
 207   RELOC_NUMBER (R_ARM_TLS_LDO32,        106)
 208   RELOC_NUMBER (R_ARM_TLS_IE32,         107)
 209   RELOC_NUMBER (R_ARM_TLS_LE32,         108)
 210   RELOC_NUMBER (R_ARM_TLS_LDO12,        109)
 211   RELOC_NUMBER (R_ARM_TLS_LE12,         110)
 212   RELOC_NUMBER (R_ARM_TLS_IE12GP,       111)
 213   /* 112 - 127 private range */
 214   RELOC_NUMBER (R_ARM_ME_TOO,           128)   /* obsolete */
 215
 216   /* Extensions?  R=read-only?  */
 217   RELOC_NUMBER (R_ARM_RXPC25,           249)
 218   RELOC_NUMBER (R_ARM_RSBREL32,         250)
 219   RELOC_NUMBER (R_ARM_THM_RPC22,        251)
 220   RELOC_NUMBER (R_ARM_RREL32,           252)
 221   RELOC_NUMBER (R_ARM_RABS32,           253)
 222   RELOC_NUMBER (R_ARM_RPC24,            254)
 223   RELOC_NUMBER (R_ARM_RBASE,            255)
 224
 225   /* Unofficial names for some of the relocs.  */
 226   FAKE_RELOC (R_ARM_GOTOFF,             R_ARM_GOTOFF32)   /* 32 bit offset to GOT.  */
 227   FAKE_RELOC (R_ARM_THM_PC22,           R_ARM_THM_CALL)
 228   FAKE_RELOC (R_ARM_THM_PC11,           R_ARM_THM_JUMP11)
 229   FAKE_RELOC (R_ARM_THM_PC9,            R_ARM_THM_JUMP8)
 230
 231   /* Relocs with both a different name, and (apparently) different meaning in
 232      GNU usage.  */
 233   FAKE_RELOC (R_ARM_GOTPC,              R_ARM_BASE_PREL)  /* 32 bit PC relative offset to GOT.  */
 234   FAKE_RELOC (R_ARM_GOT32,              R_ARM_GOT_BREL)   /* 32 bit GOT entry.  */
 235   FAKE_RELOC (R_ARM_ROSEGREL32,         R_ARM_SBREL31)    /* ??? */
 236   FAKE_RELOC (R_ARM_AMP_VCALL9,         R_ARM_BREL_ADJ)   /* Thumb-something.  Not used.  */
 237 END_RELOC_NUMBERS (R_ARM_max)
 238
 239 #ifdef BFD_ARCH_SIZE
 240 /* Routines for manipulating EABI object attributes.  */
 241 void elf32_arm_add_eabi_attr_int (bfd *, int, unsigned int);
 242 void elf32_arm_add_eabi_attr_string (bfd *, int, const char *);
 243 void elf32_arm_add_eabi_attr_compat (bfd *, unsigned int, const char *);
 244 int elf32_arm_get_eabi_attr_int (bfd *, int);
 245
 246 void elf32_arm_set_eabi_attr_contents (bfd *, bfd_byte *, bfd_vma);
 247 bfd_vma elf32_arm_eabi_attr_size (bfd *);
 248
 249 enum
 250 {
 251   Tag_NULL,
 252   Tag_File,
 253   Tag_Section,
 254   Tag_Symbol,
 255   Tag_CPU_raw_name,
 256   Tag_CPU_name,
 257   Tag_CPU_arch,
 258   Tag_CPU_arch_profile,
 259   Tag_ARM_ISA_use,
 260   Tag_THUMB_ISA_use,
 261   Tag_VFP_arch,
 262   Tag_WMMX_arch,
 263   Tag_NEON_arch,
 264   Tag_PCS_config,
 265   Tag_ABI_PCS_R9_use,
 266   Tag_ABI_PCS_RW_data,
 267   Tag_ABI_PCS_RO_data,
 268   Tag_ABI_PCS_GOT_use,
 269   Tag_ABI_PCS_wchar_t,
 270   Tag_ABI_FP_rounding,
 271   Tag_ABI_FP_denormal,
 272   Tag_ABI_FP_exceptions,
 273   Tag_ABI_FP_user_exceptions,
 274   Tag_ABI_FP_number_model,
 275   Tag_ABI_align8_needed,
 276   Tag_ABI_align8_preserved,
 277   Tag_ABI_enum_size,
 278   Tag_ABI_HardFP_use,
 279   Tag_ABI_VFP_args,
 280   Tag_ABI_WMMX_args,
 281   Tag_ABI_optimization_goals,
 282   Tag_ABI_FP_optimization_goals,
 283   Tag_compatibility,
 284 };
 285
 286 #endif
 287
 288 /* The name of the note section used to identify arm variants.  */
 289 #define ARM_NOTE_SECTION ".note.gnu.arm.ident"
 290
 291 /* Special section names.  */
 292 #define ELF_STRING_ARM_unwind           ".ARM.exidx"
 293 #define ELF_STRING_ARM_unwind_info      ".ARM.extab"
 294 #define ELF_STRING_ARM_unwind_once      ".gnu.linkonce.armexidx."
 295 #define ELF_STRING_ARM_unwind_info_once ".gnu.linkonce.armextab."
 296
 297 #endif /* _ELF_ARM_H */