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      1 //===-- llvm/Support/ELF.h - ELF constants and data structures --*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This header contains common, non-processor-specific data structures and
     11 // constants for the ELF file format.
     12 //
     13 // The details of the ELF32 bits in this file are largely based on the Tool
     14 // Interface Standard (TIS) Executable and Linking Format (ELF) Specification
     15 // Version 1.2, May 1995. The ELF64 stuff is based on ELF-64 Object File Format
     16 // Version 1.5, Draft 2, May 1998 as well as OpenBSD header files.
     17 //
     18 //===----------------------------------------------------------------------===//
     19 
     20 #ifndef LLVM_SUPPORT_ELF_H
     21 #define LLVM_SUPPORT_ELF_H
     22 
     23 #include "llvm/Support/DataTypes.h"
     24 #include <cstring>
     25 
     26 namespace llvm {
     27 
     28 namespace ELF {
     29 
     30 typedef uint32_t Elf32_Addr; // Program address
     31 typedef uint32_t Elf32_Off;  // File offset
     32 typedef uint16_t Elf32_Half;
     33 typedef uint32_t Elf32_Word;
     34 typedef int32_t  Elf32_Sword;
     35 
     36 typedef uint64_t Elf64_Addr;
     37 typedef uint64_t Elf64_Off;
     38 typedef uint16_t Elf64_Half;
     39 typedef uint32_t Elf64_Word;
     40 typedef int32_t  Elf64_Sword;
     41 typedef uint64_t Elf64_Xword;
     42 typedef int64_t  Elf64_Sxword;
     43 
     44 // Object file magic string.
     45 static const char ElfMagic[] = { 0x7f, 'E', 'L', 'F', '\0' };
     46 
     47 // e_ident size and indices.
     48 enum {
     49   EI_MAG0       = 0,          // File identification index.
     50   EI_MAG1       = 1,          // File identification index.
     51   EI_MAG2       = 2,          // File identification index.
     52   EI_MAG3       = 3,          // File identification index.
     53   EI_CLASS      = 4,          // File class.
     54   EI_DATA       = 5,          // Data encoding.
     55   EI_VERSION    = 6,          // File version.
     56   EI_OSABI      = 7,          // OS/ABI identification.
     57   EI_ABIVERSION = 8,          // ABI version.
     58   EI_PAD        = 9,          // Start of padding bytes.
     59   EI_NIDENT     = 16          // Number of bytes in e_ident.
     60 };
     61 
     62 struct Elf32_Ehdr {
     63   unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes
     64   Elf32_Half    e_type;      // Type of file (see ET_* below)
     65   Elf32_Half    e_machine;   // Required architecture for this file (see EM_*)
     66   Elf32_Word    e_version;   // Must be equal to 1
     67   Elf32_Addr    e_entry;     // Address to jump to in order to start program
     68   Elf32_Off     e_phoff;     // Program header table's file offset, in bytes
     69   Elf32_Off     e_shoff;     // Section header table's file offset, in bytes
     70   Elf32_Word    e_flags;     // Processor-specific flags
     71   Elf32_Half    e_ehsize;    // Size of ELF header, in bytes
     72   Elf32_Half    e_phentsize; // Size of an entry in the program header table
     73   Elf32_Half    e_phnum;     // Number of entries in the program header table
     74   Elf32_Half    e_shentsize; // Size of an entry in the section header table
     75   Elf32_Half    e_shnum;     // Number of entries in the section header table
     76   Elf32_Half    e_shstrndx;  // Sect hdr table index of sect name string table
     77   bool checkMagic() const {
     78     return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
     79   }
     80   unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
     81   unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
     82 };
     83 
     84 // 64-bit ELF header. Fields are the same as for ELF32, but with different
     85 // types (see above).
     86 struct Elf64_Ehdr {
     87   unsigned char e_ident[EI_NIDENT];
     88   Elf64_Half    e_type;
     89   Elf64_Half    e_machine;
     90   Elf64_Word    e_version;
     91   Elf64_Addr    e_entry;
     92   Elf64_Off     e_phoff;
     93   Elf64_Off     e_shoff;
     94   Elf64_Word    e_flags;
     95   Elf64_Half    e_ehsize;
     96   Elf64_Half    e_phentsize;
     97   Elf64_Half    e_phnum;
     98   Elf64_Half    e_shentsize;
     99   Elf64_Half    e_shnum;
    100   Elf64_Half    e_shstrndx;
    101   bool checkMagic() const {
    102     return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
    103   }
    104   unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
    105   unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
    106 };
    107 
    108 // File types
    109 enum {
    110   ET_NONE   = 0,      // No file type
    111   ET_REL    = 1,      // Relocatable file
    112   ET_EXEC   = 2,      // Executable file
    113   ET_DYN    = 3,      // Shared object file
    114   ET_CORE   = 4,      // Core file
    115   ET_LOPROC = 0xff00, // Beginning of processor-specific codes
    116   ET_HIPROC = 0xffff  // Processor-specific
    117 };
    118 
    119 // Versioning
    120 enum {
    121   EV_NONE = 0,
    122   EV_CURRENT = 1
    123 };
    124 
    125 // Machine architectures
    126 enum {
    127   EM_NONE          = 0, // No machine
    128   EM_M32           = 1, // AT&T WE 32100
    129   EM_SPARC         = 2, // SPARC
    130   EM_386           = 3, // Intel 386
    131   EM_68K           = 4, // Motorola 68000
    132   EM_88K           = 5, // Motorola 88000
    133   EM_486           = 6, // Intel 486 (deprecated)
    134   EM_860           = 7, // Intel 80860
    135   EM_MIPS          = 8, // MIPS R3000
    136   EM_S370          = 9, // IBM System/370
    137   EM_MIPS_RS3_LE   = 10, // MIPS RS3000 Little-endian
    138   EM_PARISC        = 15, // Hewlett-Packard PA-RISC
    139   EM_VPP500        = 17, // Fujitsu VPP500
    140   EM_SPARC32PLUS   = 18, // Enhanced instruction set SPARC
    141   EM_960           = 19, // Intel 80960
    142   EM_PPC           = 20, // PowerPC
    143   EM_PPC64         = 21, // PowerPC64
    144   EM_S390          = 22, // IBM System/390
    145   EM_SPU           = 23, // IBM SPU/SPC
    146   EM_V800          = 36, // NEC V800
    147   EM_FR20          = 37, // Fujitsu FR20
    148   EM_RH32          = 38, // TRW RH-32
    149   EM_RCE           = 39, // Motorola RCE
    150   EM_ARM           = 40, // ARM
    151   EM_ALPHA         = 41, // DEC Alpha
    152   EM_SH            = 42, // Hitachi SH
    153   EM_SPARCV9       = 43, // SPARC V9
    154   EM_TRICORE       = 44, // Siemens TriCore
    155   EM_ARC           = 45, // Argonaut RISC Core
    156   EM_H8_300        = 46, // Hitachi H8/300
    157   EM_H8_300H       = 47, // Hitachi H8/300H
    158   EM_H8S           = 48, // Hitachi H8S
    159   EM_H8_500        = 49, // Hitachi H8/500
    160   EM_IA_64         = 50, // Intel IA-64 processor architecture
    161   EM_MIPS_X        = 51, // Stanford MIPS-X
    162   EM_COLDFIRE      = 52, // Motorola ColdFire
    163   EM_68HC12        = 53, // Motorola M68HC12
    164   EM_MMA           = 54, // Fujitsu MMA Multimedia Accelerator
    165   EM_PCP           = 55, // Siemens PCP
    166   EM_NCPU          = 56, // Sony nCPU embedded RISC processor
    167   EM_NDR1          = 57, // Denso NDR1 microprocessor
    168   EM_STARCORE      = 58, // Motorola Star*Core processor
    169   EM_ME16          = 59, // Toyota ME16 processor
    170   EM_ST100         = 60, // STMicroelectronics ST100 processor
    171   EM_TINYJ         = 61, // Advanced Logic Corp. TinyJ embedded processor family
    172   EM_X86_64        = 62, // AMD x86-64 architecture
    173   EM_PDSP          = 63, // Sony DSP Processor
    174   EM_PDP10         = 64, // Digital Equipment Corp. PDP-10
    175   EM_PDP11         = 65, // Digital Equipment Corp. PDP-11
    176   EM_FX66          = 66, // Siemens FX66 microcontroller
    177   EM_ST9PLUS       = 67, // STMicroelectronics ST9+ 8/16 bit microcontroller
    178   EM_ST7           = 68, // STMicroelectronics ST7 8-bit microcontroller
    179   EM_68HC16        = 69, // Motorola MC68HC16 Microcontroller
    180   EM_68HC11        = 70, // Motorola MC68HC11 Microcontroller
    181   EM_68HC08        = 71, // Motorola MC68HC08 Microcontroller
    182   EM_68HC05        = 72, // Motorola MC68HC05 Microcontroller
    183   EM_SVX           = 73, // Silicon Graphics SVx
    184   EM_ST19          = 74, // STMicroelectronics ST19 8-bit microcontroller
    185   EM_VAX           = 75, // Digital VAX
    186   EM_CRIS          = 76, // Axis Communications 32-bit embedded processor
    187   EM_JAVELIN       = 77, // Infineon Technologies 32-bit embedded processor
    188   EM_FIREPATH      = 78, // Element 14 64-bit DSP Processor
    189   EM_ZSP           = 79, // LSI Logic 16-bit DSP Processor
    190   EM_MMIX          = 80, // Donald Knuth's educational 64-bit processor
    191   EM_HUANY         = 81, // Harvard University machine-independent object files
    192   EM_PRISM         = 82, // SiTera Prism
    193   EM_AVR           = 83, // Atmel AVR 8-bit microcontroller
    194   EM_FR30          = 84, // Fujitsu FR30
    195   EM_D10V          = 85, // Mitsubishi D10V
    196   EM_D30V          = 86, // Mitsubishi D30V
    197   EM_V850          = 87, // NEC v850
    198   EM_M32R          = 88, // Mitsubishi M32R
    199   EM_MN10300       = 89, // Matsushita MN10300
    200   EM_MN10200       = 90, // Matsushita MN10200
    201   EM_PJ            = 91, // picoJava
    202   EM_OPENRISC      = 92, // OpenRISC 32-bit embedded processor
    203   EM_ARC_COMPACT   = 93, // ARC International ARCompact processor (old
    204                          // spelling/synonym: EM_ARC_A5)
    205   EM_XTENSA        = 94, // Tensilica Xtensa Architecture
    206   EM_VIDEOCORE     = 95, // Alphamosaic VideoCore processor
    207   EM_TMM_GPP       = 96, // Thompson Multimedia General Purpose Processor
    208   EM_NS32K         = 97, // National Semiconductor 32000 series
    209   EM_TPC           = 98, // Tenor Network TPC processor
    210   EM_SNP1K         = 99, // Trebia SNP 1000 processor
    211   EM_ST200         = 100, // STMicroelectronics (www.st.com) ST200
    212   EM_IP2K          = 101, // Ubicom IP2xxx microcontroller family
    213   EM_MAX           = 102, // MAX Processor
    214   EM_CR            = 103, // National Semiconductor CompactRISC microprocessor
    215   EM_F2MC16        = 104, // Fujitsu F2MC16
    216   EM_MSP430        = 105, // Texas Instruments embedded microcontroller msp430
    217   EM_BLACKFIN      = 106, // Analog Devices Blackfin (DSP) processor
    218   EM_SE_C33        = 107, // S1C33 Family of Seiko Epson processors
    219   EM_SEP           = 108, // Sharp embedded microprocessor
    220   EM_ARCA          = 109, // Arca RISC Microprocessor
    221   EM_UNICORE       = 110, // Microprocessor series from PKU-Unity Ltd. and MPRC
    222                           // of Peking University
    223   EM_EXCESS        = 111, // eXcess: 16/32/64-bit configurable embedded CPU
    224   EM_DXP           = 112, // Icera Semiconductor Inc. Deep Execution Processor
    225   EM_ALTERA_NIOS2  = 113, // Altera Nios II soft-core processor
    226   EM_CRX           = 114, // National Semiconductor CompactRISC CRX
    227   EM_XGATE         = 115, // Motorola XGATE embedded processor
    228   EM_C166          = 116, // Infineon C16x/XC16x processor
    229   EM_M16C          = 117, // Renesas M16C series microprocessors
    230   EM_DSPIC30F      = 118, // Microchip Technology dsPIC30F Digital Signal
    231                           // Controller
    232   EM_CE            = 119, // Freescale Communication Engine RISC core
    233   EM_M32C          = 120, // Renesas M32C series microprocessors
    234   EM_TSK3000       = 131, // Altium TSK3000 core
    235   EM_RS08          = 132, // Freescale RS08 embedded processor
    236   EM_SHARC         = 133, // Analog Devices SHARC family of 32-bit DSP
    237                           // processors
    238   EM_ECOG2         = 134, // Cyan Technology eCOG2 microprocessor
    239   EM_SCORE7        = 135, // Sunplus S+core7 RISC processor
    240   EM_DSP24         = 136, // New Japan Radio (NJR) 24-bit DSP Processor
    241   EM_VIDEOCORE3    = 137, // Broadcom VideoCore III processor
    242   EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture
    243   EM_SE_C17        = 139, // Seiko Epson C17 family
    244   EM_TI_C6000      = 140, // The Texas Instruments TMS320C6000 DSP family
    245   EM_TI_C2000      = 141, // The Texas Instruments TMS320C2000 DSP family
    246   EM_TI_C5500      = 142, // The Texas Instruments TMS320C55x DSP family
    247   EM_MMDSP_PLUS    = 160, // STMicroelectronics 64bit VLIW Data Signal Processor
    248   EM_CYPRESS_M8C   = 161, // Cypress M8C microprocessor
    249   EM_R32C          = 162, // Renesas R32C series microprocessors
    250   EM_TRIMEDIA      = 163, // NXP Semiconductors TriMedia architecture family
    251   EM_HEXAGON       = 164, // Qualcomm Hexagon processor
    252   EM_8051          = 165, // Intel 8051 and variants
    253   EM_STXP7X        = 166, // STMicroelectronics STxP7x family of configurable
    254                           // and extensible RISC processors
    255   EM_NDS32         = 167, // Andes Technology compact code size embedded RISC
    256                           // processor family
    257   EM_ECOG1         = 168, // Cyan Technology eCOG1X family
    258   EM_ECOG1X        = 168, // Cyan Technology eCOG1X family
    259   EM_MAXQ30        = 169, // Dallas Semiconductor MAXQ30 Core Micro-controllers
    260   EM_XIMO16        = 170, // New Japan Radio (NJR) 16-bit DSP Processor
    261   EM_MANIK         = 171, // M2000 Reconfigurable RISC Microprocessor
    262   EM_CRAYNV2       = 172, // Cray Inc. NV2 vector architecture
    263   EM_RX            = 173, // Renesas RX family
    264   EM_METAG         = 174, // Imagination Technologies META processor
    265                           // architecture
    266   EM_MCST_ELBRUS   = 175, // MCST Elbrus general purpose hardware architecture
    267   EM_ECOG16        = 176, // Cyan Technology eCOG16 family
    268   EM_CR16          = 177, // National Semiconductor CompactRISC CR16 16-bit
    269                           // microprocessor
    270   EM_ETPU          = 178, // Freescale Extended Time Processing Unit
    271   EM_SLE9X         = 179, // Infineon Technologies SLE9X core
    272   EM_L10M          = 180, // Intel L10M
    273   EM_K10M          = 181, // Intel K10M
    274   EM_AARCH64       = 183, // ARM AArch64
    275   EM_AVR32         = 185, // Atmel Corporation 32-bit microprocessor family
    276   EM_STM8          = 186, // STMicroeletronics STM8 8-bit microcontroller
    277   EM_TILE64        = 187, // Tilera TILE64 multicore architecture family
    278   EM_TILEPRO       = 188, // Tilera TILEPro multicore architecture family
    279   EM_MICROBLAZE    = 189, // Xilinx MicroBlaze 32-bit RISC soft processor core
    280   EM_CUDA          = 190, // NVIDIA CUDA architecture
    281   EM_TILEGX        = 191, // Tilera TILE-Gx multicore architecture family
    282   EM_CLOUDSHIELD   = 192, // CloudShield architecture family
    283   EM_COREA_1ST     = 193, // KIPO-KAIST Core-A 1st generation processor family
    284   EM_COREA_2ND     = 194, // KIPO-KAIST Core-A 2nd generation processor family
    285   EM_ARC_COMPACT2  = 195, // Synopsys ARCompact V2
    286   EM_OPEN8         = 196, // Open8 8-bit RISC soft processor core
    287   EM_RL78          = 197, // Renesas RL78 family
    288   EM_VIDEOCORE5    = 198, // Broadcom VideoCore V processor
    289   EM_78KOR         = 199, // Renesas 78KOR family
    290   EM_56800EX       = 200, // Freescale 56800EX Digital Signal Controller (DSC)
    291   EM_MBLAZE        = 47787 // Xilinx MicroBlaze
    292 };
    293 
    294 // Object file classes.
    295 enum {
    296   ELFCLASSNONE = 0,
    297   ELFCLASS32 = 1, // 32-bit object file
    298   ELFCLASS64 = 2  // 64-bit object file
    299 };
    300 
    301 // Object file byte orderings.
    302 enum {
    303   ELFDATANONE = 0, // Invalid data encoding.
    304   ELFDATA2LSB = 1, // Little-endian object file
    305   ELFDATA2MSB = 2  // Big-endian object file
    306 };
    307 
    308 // OS ABI identification.
    309 enum {
    310   ELFOSABI_NONE = 0,          // UNIX System V ABI
    311   ELFOSABI_HPUX = 1,          // HP-UX operating system
    312   ELFOSABI_NETBSD = 2,        // NetBSD
    313   ELFOSABI_LINUX = 3,         // GNU/Linux
    314   ELFOSABI_HURD = 4,          // GNU/Hurd
    315   ELFOSABI_SOLARIS = 6,       // Solaris
    316   ELFOSABI_AIX = 7,           // AIX
    317   ELFOSABI_IRIX = 8,          // IRIX
    318   ELFOSABI_FREEBSD = 9,       // FreeBSD
    319   ELFOSABI_TRU64 = 10,        // TRU64 UNIX
    320   ELFOSABI_MODESTO = 11,      // Novell Modesto
    321   ELFOSABI_OPENBSD = 12,      // OpenBSD
    322   ELFOSABI_OPENVMS = 13,      // OpenVMS
    323   ELFOSABI_NSK = 14,          // Hewlett-Packard Non-Stop Kernel
    324   ELFOSABI_AROS = 15,         // AROS
    325   ELFOSABI_FENIXOS = 16,      // FenixOS
    326   ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
    327   ELFOSABI_C6000_LINUX = 65,  // Linux TMS320C6000
    328   ELFOSABI_ARM = 97,          // ARM
    329   ELFOSABI_STANDALONE = 255   // Standalone (embedded) application
    330 };
    331 
    332 // X86_64 relocations.
    333 enum {
    334   R_X86_64_NONE       = 0,
    335   R_X86_64_64         = 1,
    336   R_X86_64_PC32       = 2,
    337   R_X86_64_GOT32      = 3,
    338   R_X86_64_PLT32      = 4,
    339   R_X86_64_COPY       = 5,
    340   R_X86_64_GLOB_DAT   = 6,
    341   R_X86_64_JUMP_SLOT  = 7,
    342   R_X86_64_RELATIVE   = 8,
    343   R_X86_64_GOTPCREL   = 9,
    344   R_X86_64_32         = 10,
    345   R_X86_64_32S        = 11,
    346   R_X86_64_16         = 12,
    347   R_X86_64_PC16       = 13,
    348   R_X86_64_8          = 14,
    349   R_X86_64_PC8        = 15,
    350   R_X86_64_DTPMOD64   = 16,
    351   R_X86_64_DTPOFF64   = 17,
    352   R_X86_64_TPOFF64    = 18,
    353   R_X86_64_TLSGD      = 19,
    354   R_X86_64_TLSLD      = 20,
    355   R_X86_64_DTPOFF32   = 21,
    356   R_X86_64_GOTTPOFF   = 22,
    357   R_X86_64_TPOFF32    = 23,
    358   R_X86_64_PC64       = 24,
    359   R_X86_64_GOTOFF64   = 25,
    360   R_X86_64_GOTPC32    = 26,
    361   R_X86_64_GOT64      = 27,
    362   R_X86_64_GOTPCREL64 = 28,
    363   R_X86_64_GOTPC64    = 29,
    364   R_X86_64_GOTPLT64   = 30,
    365   R_X86_64_PLTOFF64   = 31,
    366   R_X86_64_SIZE32     = 32,
    367   R_X86_64_SIZE64     = 33,
    368   R_X86_64_GOTPC32_TLSDESC = 34,
    369   R_X86_64_TLSDESC_CALL    = 35,
    370   R_X86_64_TLSDESC    = 36,
    371   R_X86_64_IRELATIVE  = 37
    372 };
    373 
    374 // i386 relocations.
    375 // TODO: this is just a subset
    376 enum {
    377   R_386_NONE          = 0,
    378   R_386_32            = 1,
    379   R_386_PC32          = 2,
    380   R_386_GOT32         = 3,
    381   R_386_PLT32         = 4,
    382   R_386_COPY          = 5,
    383   R_386_GLOB_DAT      = 6,
    384   R_386_JUMP_SLOT     = 7,
    385   R_386_RELATIVE      = 8,
    386   R_386_GOTOFF        = 9,
    387   R_386_GOTPC         = 10,
    388   R_386_32PLT         = 11,
    389   R_386_TLS_TPOFF     = 14,
    390   R_386_TLS_IE        = 15,
    391   R_386_TLS_GOTIE     = 16,
    392   R_386_TLS_LE        = 17,
    393   R_386_TLS_GD        = 18,
    394   R_386_TLS_LDM       = 19,
    395   R_386_16            = 20,
    396   R_386_PC16          = 21,
    397   R_386_8             = 22,
    398   R_386_PC8           = 23,
    399   R_386_TLS_GD_32     = 24,
    400   R_386_TLS_GD_PUSH   = 25,
    401   R_386_TLS_GD_CALL   = 26,
    402   R_386_TLS_GD_POP    = 27,
    403   R_386_TLS_LDM_32    = 28,
    404   R_386_TLS_LDM_PUSH  = 29,
    405   R_386_TLS_LDM_CALL  = 30,
    406   R_386_TLS_LDM_POP   = 31,
    407   R_386_TLS_LDO_32    = 32,
    408   R_386_TLS_IE_32     = 33,
    409   R_386_TLS_LE_32     = 34,
    410   R_386_TLS_DTPMOD32  = 35,
    411   R_386_TLS_DTPOFF32  = 36,
    412   R_386_TLS_TPOFF32   = 37,
    413   R_386_TLS_GOTDESC   = 39,
    414   R_386_TLS_DESC_CALL = 40,
    415   R_386_TLS_DESC      = 41,
    416   R_386_IRELATIVE     = 42,
    417   R_386_NUM           = 43
    418 };
    419 
    420 // MBlaze relocations.
    421 enum {
    422   R_MICROBLAZE_NONE           = 0,
    423   R_MICROBLAZE_32             = 1,
    424   R_MICROBLAZE_32_PCREL       = 2,
    425   R_MICROBLAZE_64_PCREL       = 3,
    426   R_MICROBLAZE_32_PCREL_LO    = 4,
    427   R_MICROBLAZE_64             = 5,
    428   R_MICROBLAZE_32_LO          = 6,
    429   R_MICROBLAZE_SRO32          = 7,
    430   R_MICROBLAZE_SRW32          = 8,
    431   R_MICROBLAZE_64_NONE        = 9,
    432   R_MICROBLAZE_32_SYM_OP_SYM  = 10,
    433   R_MICROBLAZE_GNU_VTINHERIT  = 11,
    434   R_MICROBLAZE_GNU_VTENTRY    = 12,
    435   R_MICROBLAZE_GOTPC_64       = 13,
    436   R_MICROBLAZE_GOT_64         = 14,
    437   R_MICROBLAZE_PLT_64         = 15,
    438   R_MICROBLAZE_REL            = 16,
    439   R_MICROBLAZE_JUMP_SLOT      = 17,
    440   R_MICROBLAZE_GLOB_DAT       = 18,
    441   R_MICROBLAZE_GOTOFF_64      = 19,
    442   R_MICROBLAZE_GOTOFF_32      = 20,
    443   R_MICROBLAZE_COPY           = 21
    444 };
    445 
    446 // ELF Relocation types for PPC32
    447 enum {
    448   R_PPC_NONE                  = 0,      /* No relocation. */
    449   R_PPC_ADDR32                = 1,
    450   R_PPC_ADDR24                = 2,
    451   R_PPC_ADDR16                = 3,
    452   R_PPC_ADDR16_LO             = 4,
    453   R_PPC_ADDR16_HI             = 5,
    454   R_PPC_ADDR16_HA             = 6,
    455   R_PPC_ADDR14                = 7,
    456   R_PPC_ADDR14_BRTAKEN        = 8,
    457   R_PPC_ADDR14_BRNTAKEN       = 9,
    458   R_PPC_REL24                 = 10,
    459   R_PPC_REL14                 = 11,
    460   R_PPC_REL14_BRTAKEN         = 12,
    461   R_PPC_REL14_BRNTAKEN        = 13,
    462   R_PPC_REL32                 = 26,
    463   R_PPC_TPREL16_LO            = 70,
    464   R_PPC_TPREL16_HA            = 72
    465 };
    466 
    467 // ELF Relocation types for PPC64
    468 enum {
    469   R_PPC64_ADDR32              = 1,
    470   R_PPC64_ADDR16_LO           = 4,
    471   R_PPC64_ADDR16_HI           = 5,
    472   R_PPC64_ADDR14              = 7,
    473   R_PPC64_REL24               = 10,
    474   R_PPC64_REL32               = 26,
    475   R_PPC64_ADDR64              = 38,
    476   R_PPC64_ADDR16_HIGHER       = 39,
    477   R_PPC64_ADDR16_HIGHEST      = 41,
    478   R_PPC64_REL64               = 44,
    479   R_PPC64_TOC16               = 47,
    480   R_PPC64_TOC16_LO            = 48,
    481   R_PPC64_TOC16_HA            = 50,
    482   R_PPC64_TOC                 = 51,
    483   R_PPC64_TOC16_DS            = 63,
    484   R_PPC64_TOC16_LO_DS         = 64,
    485   R_PPC64_TLS                 = 67,
    486   R_PPC64_TPREL16_LO          = 70,
    487   R_PPC64_DTPREL16_LO         = 75,
    488   R_PPC64_DTPREL16_HA         = 77,
    489   R_PPC64_GOT_TLSGD16_LO      = 80,
    490   R_PPC64_GOT_TLSGD16_HA      = 82,
    491   R_PPC64_GOT_TLSLD16_LO      = 84,
    492   R_PPC64_GOT_TLSLD16_HA      = 86,
    493   R_PPC64_GOT_TPREL16_LO_DS   = 88,
    494   R_PPC64_GOT_TPREL16_HA      = 90,
    495   R_PPC64_TLSGD               = 107,
    496   R_PPC64_TLSLD               = 108
    497 };
    498 
    499 // ELF Relocation types for AArch64
    500 
    501 enum {
    502   R_AARCH64_NONE                        = 0x100,
    503 
    504   R_AARCH64_ABS64                       = 0x101,
    505   R_AARCH64_ABS32                       = 0x102,
    506   R_AARCH64_ABS16                       = 0x103,
    507   R_AARCH64_PREL64                      = 0x104,
    508   R_AARCH64_PREL32                      = 0x105,
    509   R_AARCH64_PREL16                      = 0x106,
    510 
    511   R_AARCH64_MOVW_UABS_G0                = 0x107,
    512   R_AARCH64_MOVW_UABS_G0_NC             = 0x108,
    513   R_AARCH64_MOVW_UABS_G1                = 0x109,
    514   R_AARCH64_MOVW_UABS_G1_NC             = 0x10a,
    515   R_AARCH64_MOVW_UABS_G2                = 0x10b,
    516   R_AARCH64_MOVW_UABS_G2_NC             = 0x10c,
    517   R_AARCH64_MOVW_UABS_G3                = 0x10d,
    518   R_AARCH64_MOVW_SABS_G0                = 0x10e,
    519   R_AARCH64_MOVW_SABS_G1                = 0x10f,
    520   R_AARCH64_MOVW_SABS_G2                = 0x110,
    521 
    522   R_AARCH64_LD_PREL_LO19                = 0x111,
    523   R_AARCH64_ADR_PREL_LO21               = 0x112,
    524   R_AARCH64_ADR_PREL_PG_HI21            = 0x113,
    525   R_AARCH64_ADD_ABS_LO12_NC             = 0x115,
    526   R_AARCH64_LDST8_ABS_LO12_NC           = 0x116,
    527 
    528   R_AARCH64_TSTBR14                     = 0x117,
    529   R_AARCH64_CONDBR19                    = 0x118,
    530   R_AARCH64_JUMP26                      = 0x11a,
    531   R_AARCH64_CALL26                      = 0x11b,
    532 
    533   R_AARCH64_LDST16_ABS_LO12_NC          = 0x11c,
    534   R_AARCH64_LDST32_ABS_LO12_NC          = 0x11d,
    535   R_AARCH64_LDST64_ABS_LO12_NC          = 0x11e,
    536 
    537   R_AARCH64_LDST128_ABS_LO12_NC         = 0x12b,
    538 
    539   R_AARCH64_ADR_GOT_PAGE                = 0x137,
    540   R_AARCH64_LD64_GOT_LO12_NC            = 0x138,
    541 
    542   R_AARCH64_TLSLD_MOVW_DTPREL_G2        = 0x20b,
    543   R_AARCH64_TLSLD_MOVW_DTPREL_G1        = 0x20c,
    544   R_AARCH64_TLSLD_MOVW_DTPREL_G1_NC     = 0x20d,
    545   R_AARCH64_TLSLD_MOVW_DTPREL_G0        = 0x20e,
    546   R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC     = 0x20f,
    547   R_AARCH64_TLSLD_ADD_DTPREL_HI12       = 0x210,
    548   R_AARCH64_TLSLD_ADD_DTPREL_LO12       = 0x211,
    549   R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC    = 0x212,
    550   R_AARCH64_TLSLD_LDST8_DTPREL_LO12     = 0x213,
    551   R_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC  = 0x214,
    552   R_AARCH64_TLSLD_LDST16_DTPREL_LO12    = 0x215,
    553   R_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC = 0x216,
    554   R_AARCH64_TLSLD_LDST32_DTPREL_LO12    = 0x217,
    555   R_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC = 0x218,
    556   R_AARCH64_TLSLD_LDST64_DTPREL_LO12    = 0x219,
    557   R_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC = 0x21a,
    558 
    559   R_AARCH64_TLSIE_MOVW_GOTTPREL_G1      = 0x21b,
    560   R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC   = 0x21c,
    561   R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21   = 0x21d,
    562   R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC = 0x21e,
    563   R_AARCH64_TLSIE_LD_GOTTPREL_PREL19    = 0x21f,
    564 
    565   R_AARCH64_TLSLE_MOVW_TPREL_G2         = 0x220,
    566   R_AARCH64_TLSLE_MOVW_TPREL_G1         = 0x221,
    567   R_AARCH64_TLSLE_MOVW_TPREL_G1_NC      = 0x222,
    568   R_AARCH64_TLSLE_MOVW_TPREL_G0         = 0x223,
    569   R_AARCH64_TLSLE_MOVW_TPREL_G0_NC      = 0x224,
    570   R_AARCH64_TLSLE_ADD_TPREL_HI12        = 0x225,
    571   R_AARCH64_TLSLE_ADD_TPREL_LO12        = 0x226,
    572   R_AARCH64_TLSLE_ADD_TPREL_LO12_NC     = 0x227,
    573   R_AARCH64_TLSLE_LDST8_TPREL_LO12      = 0x228,
    574   R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC   = 0x229,
    575   R_AARCH64_TLSLE_LDST16_TPREL_LO12     = 0x22a,
    576   R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC  = 0x22b,
    577   R_AARCH64_TLSLE_LDST32_TPREL_LO12     = 0x22c,
    578   R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC  = 0x22d,
    579   R_AARCH64_TLSLE_LDST64_TPREL_LO12     = 0x22e,
    580   R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC  = 0x22f,
    581 
    582   R_AARCH64_TLSDESC_ADR_PAGE            = 0x232,
    583   R_AARCH64_TLSDESC_LD64_LO12_NC        = 0x233,
    584   R_AARCH64_TLSDESC_ADD_LO12_NC         = 0x234,
    585 
    586   R_AARCH64_TLSDESC_CALL                = 0x239
    587 };
    588 
    589 // ARM Specific e_flags
    590 enum {
    591   EF_ARM_SOFT_FLOAT =     0x00000200U,
    592   EF_ARM_VFP_FLOAT =      0x00000400U,
    593   EF_ARM_EABI_UNKNOWN =   0x00000000U,
    594   EF_ARM_EABI_VER1 =      0x01000000U,
    595   EF_ARM_EABI_VER2 =      0x02000000U,
    596   EF_ARM_EABI_VER3 =      0x03000000U,
    597   EF_ARM_EABI_VER4 =      0x04000000U,
    598   EF_ARM_EABI_VER5 =      0x05000000U,
    599   EF_ARM_EABIMASK =       0xFF000000U
    600 };
    601 
    602 // ELF Relocation types for ARM
    603 // Meets 2.08 ABI Specs.
    604 
    605 enum {
    606   R_ARM_NONE                  = 0x00,
    607   R_ARM_PC24                  = 0x01,
    608   R_ARM_ABS32                 = 0x02,
    609   R_ARM_REL32                 = 0x03,
    610   R_ARM_LDR_PC_G0             = 0x04,
    611   R_ARM_ABS16                 = 0x05,
    612   R_ARM_ABS12                 = 0x06,
    613   R_ARM_THM_ABS5              = 0x07,
    614   R_ARM_ABS8                  = 0x08,
    615   R_ARM_SBREL32               = 0x09,
    616   R_ARM_THM_CALL              = 0x0a,
    617   R_ARM_THM_PC8               = 0x0b,
    618   R_ARM_BREL_ADJ              = 0x0c,
    619   R_ARM_TLS_DESC              = 0x0d,
    620   R_ARM_THM_SWI8              = 0x0e,
    621   R_ARM_XPC25                 = 0x0f,
    622   R_ARM_THM_XPC22             = 0x10,
    623   R_ARM_TLS_DTPMOD32          = 0x11,
    624   R_ARM_TLS_DTPOFF32          = 0x12,
    625   R_ARM_TLS_TPOFF32           = 0x13,
    626   R_ARM_COPY                  = 0x14,
    627   R_ARM_GLOB_DAT              = 0x15,
    628   R_ARM_JUMP_SLOT             = 0x16,
    629   R_ARM_RELATIVE              = 0x17,
    630   R_ARM_GOTOFF32              = 0x18,
    631   R_ARM_BASE_PREL             = 0x19,
    632   R_ARM_GOT_BREL              = 0x1a,
    633   R_ARM_PLT32                 = 0x1b,
    634   R_ARM_CALL                  = 0x1c,
    635   R_ARM_JUMP24                = 0x1d,
    636   R_ARM_THM_JUMP24            = 0x1e,
    637   R_ARM_BASE_ABS              = 0x1f,
    638   R_ARM_ALU_PCREL_7_0         = 0x20,
    639   R_ARM_ALU_PCREL_15_8        = 0x21,
    640   R_ARM_ALU_PCREL_23_15       = 0x22,
    641   R_ARM_LDR_SBREL_11_0_NC     = 0x23,
    642   R_ARM_ALU_SBREL_19_12_NC    = 0x24,
    643   R_ARM_ALU_SBREL_27_20_CK    = 0x25,
    644   R_ARM_TARGET1               = 0x26,
    645   R_ARM_SBREL31               = 0x27,
    646   R_ARM_V4BX                  = 0x28,
    647   R_ARM_TARGET2               = 0x29,
    648   R_ARM_PREL31                = 0x2a,
    649   R_ARM_MOVW_ABS_NC           = 0x2b,
    650   R_ARM_MOVT_ABS              = 0x2c,
    651   R_ARM_MOVW_PREL_NC          = 0x2d,
    652   R_ARM_MOVT_PREL             = 0x2e,
    653   R_ARM_THM_MOVW_ABS_NC       = 0x2f,
    654   R_ARM_THM_MOVT_ABS          = 0x30,
    655   R_ARM_THM_MOVW_PREL_NC      = 0x31,
    656   R_ARM_THM_MOVT_PREL         = 0x32,
    657   R_ARM_THM_JUMP19            = 0x33,
    658   R_ARM_THM_JUMP6             = 0x34,
    659   R_ARM_THM_ALU_PREL_11_0     = 0x35,
    660   R_ARM_THM_PC12              = 0x36,
    661   R_ARM_ABS32_NOI             = 0x37,
    662   R_ARM_REL32_NOI             = 0x38,
    663   R_ARM_ALU_PC_G0_NC          = 0x39,
    664   R_ARM_ALU_PC_G0             = 0x3a,
    665   R_ARM_ALU_PC_G1_NC          = 0x3b,
    666   R_ARM_ALU_PC_G1             = 0x3c,
    667   R_ARM_ALU_PC_G2             = 0x3d,
    668   R_ARM_LDR_PC_G1             = 0x3e,
    669   R_ARM_LDR_PC_G2             = 0x3f,
    670   R_ARM_LDRS_PC_G0            = 0x40,
    671   R_ARM_LDRS_PC_G1            = 0x41,
    672   R_ARM_LDRS_PC_G2            = 0x42,
    673   R_ARM_LDC_PC_G0             = 0x43,
    674   R_ARM_LDC_PC_G1             = 0x44,
    675   R_ARM_LDC_PC_G2             = 0x45,
    676   R_ARM_ALU_SB_G0_NC          = 0x46,
    677   R_ARM_ALU_SB_G0             = 0x47,
    678   R_ARM_ALU_SB_G1_NC          = 0x48,
    679   R_ARM_ALU_SB_G1             = 0x49,
    680   R_ARM_ALU_SB_G2             = 0x4a,
    681   R_ARM_LDR_SB_G0             = 0x4b,
    682   R_ARM_LDR_SB_G1             = 0x4c,
    683   R_ARM_LDR_SB_G2             = 0x4d,
    684   R_ARM_LDRS_SB_G0            = 0x4e,
    685   R_ARM_LDRS_SB_G1            = 0x4f,
    686   R_ARM_LDRS_SB_G2            = 0x50,
    687   R_ARM_LDC_SB_G0             = 0x51,
    688   R_ARM_LDC_SB_G1             = 0x52,
    689   R_ARM_LDC_SB_G2             = 0x53,
    690   R_ARM_MOVW_BREL_NC          = 0x54,
    691   R_ARM_MOVT_BREL             = 0x55,
    692   R_ARM_MOVW_BREL             = 0x56,
    693   R_ARM_THM_MOVW_BREL_NC      = 0x57,
    694   R_ARM_THM_MOVT_BREL         = 0x58,
    695   R_ARM_THM_MOVW_BREL         = 0x59,
    696   R_ARM_TLS_GOTDESC           = 0x5a,
    697   R_ARM_TLS_CALL              = 0x5b,
    698   R_ARM_TLS_DESCSEQ           = 0x5c,
    699   R_ARM_THM_TLS_CALL          = 0x5d,
    700   R_ARM_PLT32_ABS             = 0x5e,
    701   R_ARM_GOT_ABS               = 0x5f,
    702   R_ARM_GOT_PREL              = 0x60,
    703   R_ARM_GOT_BREL12            = 0x61,
    704   R_ARM_GOTOFF12              = 0x62,
    705   R_ARM_GOTRELAX              = 0x63,
    706   R_ARM_GNU_VTENTRY           = 0x64,
    707   R_ARM_GNU_VTINHERIT         = 0x65,
    708   R_ARM_THM_JUMP11            = 0x66,
    709   R_ARM_THM_JUMP8             = 0x67,
    710   R_ARM_TLS_GD32              = 0x68,
    711   R_ARM_TLS_LDM32             = 0x69,
    712   R_ARM_TLS_LDO32             = 0x6a,
    713   R_ARM_TLS_IE32              = 0x6b,
    714   R_ARM_TLS_LE32              = 0x6c,
    715   R_ARM_TLS_LDO12             = 0x6d,
    716   R_ARM_TLS_LE12              = 0x6e,
    717   R_ARM_TLS_IE12GP            = 0x6f,
    718   R_ARM_PRIVATE_0             = 0x70,
    719   R_ARM_PRIVATE_1             = 0x71,
    720   R_ARM_PRIVATE_2             = 0x72,
    721   R_ARM_PRIVATE_3             = 0x73,
    722   R_ARM_PRIVATE_4             = 0x74,
    723   R_ARM_PRIVATE_5             = 0x75,
    724   R_ARM_PRIVATE_6             = 0x76,
    725   R_ARM_PRIVATE_7             = 0x77,
    726   R_ARM_PRIVATE_8             = 0x78,
    727   R_ARM_PRIVATE_9             = 0x79,
    728   R_ARM_PRIVATE_10            = 0x7a,
    729   R_ARM_PRIVATE_11            = 0x7b,
    730   R_ARM_PRIVATE_12            = 0x7c,
    731   R_ARM_PRIVATE_13            = 0x7d,
    732   R_ARM_PRIVATE_14            = 0x7e,
    733   R_ARM_PRIVATE_15            = 0x7f,
    734   R_ARM_ME_TOO                = 0x80,
    735   R_ARM_THM_TLS_DESCSEQ16     = 0x81,
    736   R_ARM_THM_TLS_DESCSEQ32     = 0x82
    737 };
    738 
    739 // Mips Specific e_flags
    740 enum {
    741   EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions
    742   EF_MIPS_PIC       = 0x00000002, // Position independent code
    743   EF_MIPS_CPIC      = 0x00000004, // Call object with Position independent code
    744   EF_MIPS_ABI_O32   = 0x00001000, // This file follows the first MIPS 32 bit ABI
    745 
    746   //ARCH_ASE
    747   EF_MIPS_MICROMIPS = 0x02000000, // microMIPS
    748   EF_MIPS_ARCH_ASE_M16 =
    749                       0x04000000, // Has Mips-16 ISA extensions
    750   //ARCH
    751   EF_MIPS_ARCH_1    = 0x00000000, // MIPS1 instruction set
    752   EF_MIPS_ARCH_2    = 0x10000000, // MIPS2 instruction set
    753   EF_MIPS_ARCH_3    = 0x20000000, // MIPS3 instruction set
    754   EF_MIPS_ARCH_4    = 0x30000000, // MIPS4 instruction set
    755   EF_MIPS_ARCH_5    = 0x40000000, // MIPS5 instruction set
    756   EF_MIPS_ARCH_32   = 0x50000000, // MIPS32 instruction set per linux not elf.h
    757   EF_MIPS_ARCH_64   = 0x60000000, // MIPS64 instruction set per linux not elf.h
    758   EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2
    759   EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2
    760   EF_MIPS_ARCH      = 0xf0000000  // Mask for applying EF_MIPS_ARCH_ variant
    761 };
    762 
    763 // ELF Relocation types for Mips
    764 // .
    765 enum {
    766   R_MIPS_NONE              =  0,
    767   R_MIPS_16                =  1,
    768   R_MIPS_32                =  2,
    769   R_MIPS_REL32             =  3,
    770   R_MIPS_26                =  4,
    771   R_MIPS_HI16              =  5,
    772   R_MIPS_LO16              =  6,
    773   R_MIPS_GPREL16           =  7,
    774   R_MIPS_LITERAL           =  8,
    775   R_MIPS_GOT16             =  9,
    776   R_MIPS_GOT               =  9,
    777   R_MIPS_PC16              = 10,
    778   R_MIPS_CALL16            = 11,
    779   R_MIPS_GPREL32           = 12,
    780   R_MIPS_SHIFT5            = 16,
    781   R_MIPS_SHIFT6            = 17,
    782   R_MIPS_64                = 18,
    783   R_MIPS_GOT_DISP          = 19,
    784   R_MIPS_GOT_PAGE          = 20,
    785   R_MIPS_GOT_OFST          = 21,
    786   R_MIPS_GOT_HI16          = 22,
    787   R_MIPS_GOT_LO16          = 23,
    788   R_MIPS_SUB               = 24,
    789   R_MIPS_INSERT_A          = 25,
    790   R_MIPS_INSERT_B          = 26,
    791   R_MIPS_DELETE            = 27,
    792   R_MIPS_HIGHER            = 28,
    793   R_MIPS_HIGHEST           = 29,
    794   R_MIPS_CALL_HI16         = 30,
    795   R_MIPS_CALL_LO16         = 31,
    796   R_MIPS_SCN_DISP          = 32,
    797   R_MIPS_REL16             = 33,
    798   R_MIPS_ADD_IMMEDIATE     = 34,
    799   R_MIPS_PJUMP             = 35,
    800   R_MIPS_RELGOT            = 36,
    801   R_MIPS_JALR              = 37,
    802   R_MIPS_TLS_DTPMOD32      = 38,
    803   R_MIPS_TLS_DTPREL32      = 39,
    804   R_MIPS_TLS_DTPMOD64      = 40,
    805   R_MIPS_TLS_DTPREL64      = 41,
    806   R_MIPS_TLS_GD            = 42,
    807   R_MIPS_TLS_LDM           = 43,
    808   R_MIPS_TLS_DTPREL_HI16   = 44,
    809   R_MIPS_TLS_DTPREL_LO16   = 45,
    810   R_MIPS_TLS_GOTTPREL      = 46,
    811   R_MIPS_TLS_TPREL32       = 47,
    812   R_MIPS_TLS_TPREL64       = 48,
    813   R_MIPS_TLS_TPREL_HI16    = 49,
    814   R_MIPS_TLS_TPREL_LO16    = 50,
    815   R_MIPS_GLOB_DAT          = 51,
    816   R_MIPS_COPY              = 126,
    817   R_MIPS_JUMP_SLOT         = 127,
    818   R_MIPS_NUM               = 218
    819 };
    820 
    821 // Special values for the st_other field in the symbol table entry for MIPS.
    822 enum {
    823   STO_MIPS_MICROMIPS       = 0x80 // MIPS Specific ISA for MicroMips
    824 };
    825 
    826 // Hexagon Specific e_flags
    827 // Release 5 ABI
    828 enum {
    829   // Object processor version flags, bits[3:0]
    830   EF_HEXAGON_MACH_V2      = 0x00000001,   // Hexagon V2
    831   EF_HEXAGON_MACH_V3      = 0x00000002,   // Hexagon V3
    832   EF_HEXAGON_MACH_V4      = 0x00000003,   // Hexagon V4
    833   EF_HEXAGON_MACH_V5      = 0x00000004,   // Hexagon V5
    834 
    835   // Highest ISA version flags
    836   EF_HEXAGON_ISA_MACH     = 0x00000000,   // Same as specified in bits[3:0]
    837                                           // of e_flags
    838   EF_HEXAGON_ISA_V2       = 0x00000010,   // Hexagon V2 ISA
    839   EF_HEXAGON_ISA_V3       = 0x00000020,   // Hexagon V3 ISA
    840   EF_HEXAGON_ISA_V4       = 0x00000030,   // Hexagon V4 ISA
    841   EF_HEXAGON_ISA_V5       = 0x00000040    // Hexagon V5 ISA
    842 };
    843 
    844 // Hexagon specific Section indexes for common small data
    845 // Release 5 ABI
    846 enum {
    847   SHN_HEXAGON_SCOMMON     = 0xff00,       // Other access sizes
    848   SHN_HEXAGON_SCOMMON_1   = 0xff01,       // Byte-sized access
    849   SHN_HEXAGON_SCOMMON_2   = 0xff02,       // Half-word-sized access
    850   SHN_HEXAGON_SCOMMON_4   = 0xff03,       // Word-sized access
    851   SHN_HEXAGON_SCOMMON_8   = 0xff04        // Double-word-size access
    852 };
    853 
    854 // ELF Relocation types for Hexagon
    855 // Release 5 ABI
    856 enum {
    857   R_HEX_NONE              =  0,
    858   R_HEX_B22_PCREL         =  1,
    859   R_HEX_B15_PCREL         =  2,
    860   R_HEX_B7_PCREL          =  3,
    861   R_HEX_LO16              =  4,
    862   R_HEX_HI16              =  5,
    863   R_HEX_32                =  6,
    864   R_HEX_16                =  7,
    865   R_HEX_8                 =  8,
    866   R_HEX_GPREL16_0         =  9,
    867   R_HEX_GPREL16_1         =  10,
    868   R_HEX_GPREL16_2         =  11,
    869   R_HEX_GPREL16_3         =  12,
    870   R_HEX_HL16              =  13,
    871   R_HEX_B13_PCREL         =  14,
    872   R_HEX_B9_PCREL          =  15,
    873   R_HEX_B32_PCREL_X       =  16,
    874   R_HEX_32_6_X            =  17,
    875   R_HEX_B22_PCREL_X       =  18,
    876   R_HEX_B15_PCREL_X       =  19,
    877   R_HEX_B13_PCREL_X       =  20,
    878   R_HEX_B9_PCREL_X        =  21,
    879   R_HEX_B7_PCREL_X        =  22,
    880   R_HEX_16_X              =  23,
    881   R_HEX_12_X              =  24,
    882   R_HEX_11_X              =  25,
    883   R_HEX_10_X              =  26,
    884   R_HEX_9_X               =  27,
    885   R_HEX_8_X               =  28,
    886   R_HEX_7_X               =  29,
    887   R_HEX_6_X               =  30,
    888   R_HEX_32_PCREL          =  31,
    889   R_HEX_COPY              =  32,
    890   R_HEX_GLOB_DAT          =  33,
    891   R_HEX_JMP_SLOT          =  34,
    892   R_HEX_RELATIVE          =  35,
    893   R_HEX_PLT_B22_PCREL     =  36,
    894   R_HEX_GOTREL_LO16       =  37,
    895   R_HEX_GOTREL_HI16       =  38,
    896   R_HEX_GOTREL_32         =  39,
    897   R_HEX_GOT_LO16          =  40,
    898   R_HEX_GOT_HI16          =  41,
    899   R_HEX_GOT_32            =  42,
    900   R_HEX_GOT_16            =  43,
    901   R_HEX_DTPMOD_32         =  44,
    902   R_HEX_DTPREL_LO16       =  45,
    903   R_HEX_DTPREL_HI16       =  46,
    904   R_HEX_DTPREL_32         =  47,
    905   R_HEX_DTPREL_16         =  48,
    906   R_HEX_GD_PLT_B22_PCREL  =  49,
    907   R_HEX_GD_GOT_LO16       =  50,
    908   R_HEX_GD_GOT_HI16       =  51,
    909   R_HEX_GD_GOT_32         =  52,
    910   R_HEX_GD_GOT_16         =  53,
    911   R_HEX_IE_LO16           =  54,
    912   R_HEX_IE_HI16           =  55,
    913   R_HEX_IE_32             =  56,
    914   R_HEX_IE_GOT_LO16       =  57,
    915   R_HEX_IE_GOT_HI16       =  58,
    916   R_HEX_IE_GOT_32         =  59,
    917   R_HEX_IE_GOT_16         =  60,
    918   R_HEX_TPREL_LO16        =  61,
    919   R_HEX_TPREL_HI16        =  62,
    920   R_HEX_TPREL_32          =  63,
    921   R_HEX_TPREL_16          =  64,
    922   R_HEX_6_PCREL_X         =  65,
    923   R_HEX_GOTREL_32_6_X     =  66,
    924   R_HEX_GOTREL_16_X       =  67,
    925   R_HEX_GOTREL_11_X       =  68,
    926   R_HEX_GOT_32_6_X        =  69,
    927   R_HEX_GOT_16_X          =  70,
    928   R_HEX_GOT_11_X          =  71,
    929   R_HEX_DTPREL_32_6_X     =  72,
    930   R_HEX_DTPREL_16_X       =  73,
    931   R_HEX_DTPREL_11_X       =  74,
    932   R_HEX_GD_GOT_32_6_X     =  75,
    933   R_HEX_GD_GOT_16_X       =  76,
    934   R_HEX_GD_GOT_11_X       =  77,
    935   R_HEX_IE_32_6_X         =  78,
    936   R_HEX_IE_16_X           =  79,
    937   R_HEX_IE_GOT_32_6_X     =  80,
    938   R_HEX_IE_GOT_16_X       =  81,
    939   R_HEX_IE_GOT_11_X       =  82,
    940   R_HEX_TPREL_32_6_X      =  83,
    941   R_HEX_TPREL_16_X        =  84,
    942   R_HEX_TPREL_11_X        =  85
    943 };
    944 
    945 // Section header.
    946 struct Elf32_Shdr {
    947   Elf32_Word sh_name;      // Section name (index into string table)
    948   Elf32_Word sh_type;      // Section type (SHT_*)
    949   Elf32_Word sh_flags;     // Section flags (SHF_*)
    950   Elf32_Addr sh_addr;      // Address where section is to be loaded
    951   Elf32_Off  sh_offset;    // File offset of section data, in bytes
    952   Elf32_Word sh_size;      // Size of section, in bytes
    953   Elf32_Word sh_link;      // Section type-specific header table index link
    954   Elf32_Word sh_info;      // Section type-specific extra information
    955   Elf32_Word sh_addralign; // Section address alignment
    956   Elf32_Word sh_entsize;   // Size of records contained within the section
    957 };
    958 
    959 // Section header for ELF64 - same fields as ELF32, different types.
    960 struct Elf64_Shdr {
    961   Elf64_Word  sh_name;
    962   Elf64_Word  sh_type;
    963   Elf64_Xword sh_flags;
    964   Elf64_Addr  sh_addr;
    965   Elf64_Off   sh_offset;
    966   Elf64_Xword sh_size;
    967   Elf64_Word  sh_link;
    968   Elf64_Word  sh_info;
    969   Elf64_Xword sh_addralign;
    970   Elf64_Xword sh_entsize;
    971 };
    972 
    973 // Special section indices.
    974 enum {
    975   SHN_UNDEF     = 0,      // Undefined, missing, irrelevant, or meaningless
    976   SHN_LORESERVE = 0xff00, // Lowest reserved index
    977   SHN_LOPROC    = 0xff00, // Lowest processor-specific index
    978   SHN_HIPROC    = 0xff1f, // Highest processor-specific index
    979   SHN_LOOS      = 0xff20, // Lowest operating system-specific index
    980   SHN_HIOS      = 0xff3f, // Highest operating system-specific index
    981   SHN_ABS       = 0xfff1, // Symbol has absolute value; does not need relocation
    982   SHN_COMMON    = 0xfff2, // FORTRAN COMMON or C external global variables
    983   SHN_XINDEX    = 0xffff, // Mark that the index is >= SHN_LORESERVE
    984   SHN_HIRESERVE = 0xffff  // Highest reserved index
    985 };
    986 
    987 // Section types.
    988 enum {
    989   SHT_NULL          = 0,  // No associated section (inactive entry).
    990   SHT_PROGBITS      = 1,  // Program-defined contents.
    991   SHT_SYMTAB        = 2,  // Symbol table.
    992   SHT_STRTAB        = 3,  // String table.
    993   SHT_RELA          = 4,  // Relocation entries; explicit addends.
    994   SHT_HASH          = 5,  // Symbol hash table.
    995   SHT_DYNAMIC       = 6,  // Information for dynamic linking.
    996   SHT_NOTE          = 7,  // Information about the file.
    997   SHT_NOBITS        = 8,  // Data occupies no space in the file.
    998   SHT_REL           = 9,  // Relocation entries; no explicit addends.
    999   SHT_SHLIB         = 10, // Reserved.
   1000   SHT_DYNSYM        = 11, // Symbol table.
   1001   SHT_INIT_ARRAY    = 14, // Pointers to initialization functions.
   1002   SHT_FINI_ARRAY    = 15, // Pointers to termination functions.
   1003   SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions.
   1004   SHT_GROUP         = 17, // Section group.
   1005   SHT_SYMTAB_SHNDX  = 18, // Indices for SHN_XINDEX entries.
   1006   SHT_LOOS          = 0x60000000, // Lowest operating system-specific type.
   1007   SHT_GNU_ATTRIBUTES= 0x6ffffff5, // Object attributes.
   1008   SHT_GNU_HASH      = 0x6ffffff6, // GNU-style hash table.
   1009   SHT_GNU_verdef    = 0x6ffffffd, // GNU version definitions.
   1010   SHT_GNU_verneed   = 0x6ffffffe, // GNU version references.
   1011   SHT_GNU_versym    = 0x6fffffff, // GNU symbol versions table.
   1012   SHT_HIOS          = 0x6fffffff, // Highest operating system-specific type.
   1013   SHT_LOPROC        = 0x70000000, // Lowest processor arch-specific type.
   1014   // Fixme: All this is duplicated in MCSectionELF. Why??
   1015   // Exception Index table
   1016   SHT_ARM_EXIDX           = 0x70000001U,
   1017   // BPABI DLL dynamic linking pre-emption map
   1018   SHT_ARM_PREEMPTMAP      = 0x70000002U,
   1019   //  Object file compatibility attributes
   1020   SHT_ARM_ATTRIBUTES      = 0x70000003U,
   1021   SHT_ARM_DEBUGOVERLAY    = 0x70000004U,
   1022   SHT_ARM_OVERLAYSECTION  = 0x70000005U,
   1023   SHT_HEX_ORDERED         = 0x70000000, // Link editor is to sort the entries in
   1024                                         // this section based on their sizes
   1025   SHT_X86_64_UNWIND       = 0x70000001, // Unwind information
   1026 
   1027   SHT_MIPS_REGINFO        = 0x70000006, // Register usage information
   1028   SHT_MIPS_OPTIONS        = 0x7000000d, // General options
   1029 
   1030   SHT_HIPROC        = 0x7fffffff, // Highest processor arch-specific type.
   1031   SHT_LOUSER        = 0x80000000, // Lowest type reserved for applications.
   1032   SHT_HIUSER        = 0xffffffff  // Highest type reserved for applications.
   1033 };
   1034 
   1035 // Section flags.
   1036 enum {
   1037   // Section data should be writable during execution.
   1038   SHF_WRITE = 0x1,
   1039 
   1040   // Section occupies memory during program execution.
   1041   SHF_ALLOC = 0x2,
   1042 
   1043   // Section contains executable machine instructions.
   1044   SHF_EXECINSTR = 0x4,
   1045 
   1046   // The data in this section may be merged.
   1047   SHF_MERGE = 0x10,
   1048 
   1049   // The data in this section is null-terminated strings.
   1050   SHF_STRINGS = 0x20,
   1051 
   1052   // A field in this section holds a section header table index.
   1053   SHF_INFO_LINK = 0x40U,
   1054 
   1055   // Adds special ordering requirements for link editors.
   1056   SHF_LINK_ORDER = 0x80U,
   1057 
   1058   // This section requires special OS-specific processing to avoid incorrect
   1059   // behavior.
   1060   SHF_OS_NONCONFORMING = 0x100U,
   1061 
   1062   // This section is a member of a section group.
   1063   SHF_GROUP = 0x200U,
   1064 
   1065   // This section holds Thread-Local Storage.
   1066   SHF_TLS = 0x400U,
   1067 
   1068   // Start of target-specific flags.
   1069 
   1070   /// XCORE_SHF_CP_SECTION - All sections with the "c" flag are grouped
   1071   /// together by the linker to form the constant pool and the cp register is
   1072   /// set to the start of the constant pool by the boot code.
   1073   XCORE_SHF_CP_SECTION = 0x800U,
   1074 
   1075   /// XCORE_SHF_DP_SECTION - All sections with the "d" flag are grouped
   1076   /// together by the linker to form the data section and the dp register is
   1077   /// set to the start of the section by the boot code.
   1078   XCORE_SHF_DP_SECTION = 0x1000U,
   1079 
   1080   SHF_MASKOS   = 0x0ff00000,
   1081 
   1082   // Bits indicating processor-specific flags.
   1083   SHF_MASKPROC = 0xf0000000,
   1084 
   1085   // If an object file section does not have this flag set, then it may not hold
   1086   // more than 2GB and can be freely referred to in objects using smaller code
   1087   // models. Otherwise, only objects using larger code models can refer to them.
   1088   // For example, a medium code model object can refer to data in a section that
   1089   // sets this flag besides being able to refer to data in a section that does
   1090   // not set it; likewise, a small code model object can refer only to code in a
   1091   // section that does not set this flag.
   1092   SHF_X86_64_LARGE = 0x10000000,
   1093 
   1094   // All sections with the GPREL flag are grouped into a global data area
   1095   // for faster accesses
   1096   SHF_HEX_GPREL = 0x10000000,
   1097 
   1098   // Do not strip this section. FIXME: We need target specific SHF_ enums.
   1099   SHF_MIPS_NOSTRIP = 0x8000000
   1100 };
   1101 
   1102 // Section Group Flags
   1103 enum {
   1104   GRP_COMDAT = 0x1,
   1105   GRP_MASKOS = 0x0ff00000,
   1106   GRP_MASKPROC = 0xf0000000
   1107 };
   1108 
   1109 // Symbol table entries for ELF32.
   1110 struct Elf32_Sym {
   1111   Elf32_Word    st_name;  // Symbol name (index into string table)
   1112   Elf32_Addr    st_value; // Value or address associated with the symbol
   1113   Elf32_Word    st_size;  // Size of the symbol
   1114   unsigned char st_info;  // Symbol's type and binding attributes
   1115   unsigned char st_other; // Must be zero; reserved
   1116   Elf32_Half    st_shndx; // Which section (header table index) it's defined in
   1117 
   1118   // These accessors and mutators correspond to the ELF32_ST_BIND,
   1119   // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
   1120   unsigned char getBinding() const { return st_info >> 4; }
   1121   unsigned char getType() const { return st_info & 0x0f; }
   1122   void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
   1123   void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
   1124   void setBindingAndType(unsigned char b, unsigned char t) {
   1125     st_info = (b << 4) + (t & 0x0f);
   1126   }
   1127 };
   1128 
   1129 // Symbol table entries for ELF64.
   1130 struct Elf64_Sym {
   1131   Elf64_Word      st_name;  // Symbol name (index into string table)
   1132   unsigned char   st_info;  // Symbol's type and binding attributes
   1133   unsigned char   st_other; // Must be zero; reserved
   1134   Elf64_Half      st_shndx; // Which section (header tbl index) it's defined in
   1135   Elf64_Addr      st_value; // Value or address associated with the symbol
   1136   Elf64_Xword     st_size;  // Size of the symbol
   1137 
   1138   // These accessors and mutators are identical to those defined for ELF32
   1139   // symbol table entries.
   1140   unsigned char getBinding() const { return st_info >> 4; }
   1141   unsigned char getType() const { return st_info & 0x0f; }
   1142   void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
   1143   void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
   1144   void setBindingAndType(unsigned char b, unsigned char t) {
   1145     st_info = (b << 4) + (t & 0x0f);
   1146   }
   1147 };
   1148 
   1149 // The size (in bytes) of symbol table entries.
   1150 enum {
   1151   SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
   1152   SYMENTRY_SIZE64 = 24  // 64-bit symbol entry size.
   1153 };
   1154 
   1155 // Symbol bindings.
   1156 enum {
   1157   STB_LOCAL = 0,   // Local symbol, not visible outside obj file containing def
   1158   STB_GLOBAL = 1,  // Global symbol, visible to all object files being combined
   1159   STB_WEAK = 2,    // Weak symbol, like global but lower-precedence
   1160   STB_LOOS   = 10, // Lowest operating system-specific binding type
   1161   STB_HIOS   = 12, // Highest operating system-specific binding type
   1162   STB_LOPROC = 13, // Lowest processor-specific binding type
   1163   STB_HIPROC = 15  // Highest processor-specific binding type
   1164 };
   1165 
   1166 // Symbol types.
   1167 enum {
   1168   STT_NOTYPE  = 0,   // Symbol's type is not specified
   1169   STT_OBJECT  = 1,   // Symbol is a data object (variable, array, etc.)
   1170   STT_FUNC    = 2,   // Symbol is executable code (function, etc.)
   1171   STT_SECTION = 3,   // Symbol refers to a section
   1172   STT_FILE    = 4,   // Local, absolute symbol that refers to a file
   1173   STT_COMMON  = 5,   // An uninitialized common block
   1174   STT_TLS     = 6,   // Thread local data object
   1175   STT_LOOS    = 7,   // Lowest operating system-specific symbol type
   1176   STT_HIOS    = 8,   // Highest operating system-specific symbol type
   1177   STT_GNU_IFUNC = 10, // GNU indirect function
   1178   STT_LOPROC  = 13,  // Lowest processor-specific symbol type
   1179   STT_HIPROC  = 15   // Highest processor-specific symbol type
   1180 };
   1181 
   1182 enum {
   1183   STV_DEFAULT   = 0,  // Visibility is specified by binding type
   1184   STV_INTERNAL  = 1,  // Defined by processor supplements
   1185   STV_HIDDEN    = 2,  // Not visible to other components
   1186   STV_PROTECTED = 3   // Visible in other components but not preemptable
   1187 };
   1188 
   1189 // Symbol number.
   1190 enum {
   1191   STN_UNDEF = 0
   1192 };
   1193 
   1194 // Relocation entry, without explicit addend.
   1195 struct Elf32_Rel {
   1196   Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
   1197   Elf32_Word r_info;   // Symbol table index and type of relocation to apply
   1198 
   1199   // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
   1200   // and ELF32_R_INFO macros defined in the ELF specification:
   1201   Elf32_Word getSymbol() const { return (r_info >> 8); }
   1202   unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
   1203   void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
   1204   void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
   1205   void setSymbolAndType(Elf32_Word s, unsigned char t) {
   1206     r_info = (s << 8) + t;
   1207   }
   1208 };
   1209 
   1210 // Relocation entry with explicit addend.
   1211 struct Elf32_Rela {
   1212   Elf32_Addr  r_offset; // Location (file byte offset, or program virtual addr)
   1213   Elf32_Word  r_info;   // Symbol table index and type of relocation to apply
   1214   Elf32_Sword r_addend; // Compute value for relocatable field by adding this
   1215 
   1216   // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
   1217   // and ELF32_R_INFO macros defined in the ELF specification:
   1218   Elf32_Word getSymbol() const { return (r_info >> 8); }
   1219   unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
   1220   void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
   1221   void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
   1222   void setSymbolAndType(Elf32_Word s, unsigned char t) {
   1223     r_info = (s << 8) + t;
   1224   }
   1225 };
   1226 
   1227 // Relocation entry, without explicit addend.
   1228 struct Elf64_Rel {
   1229   Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
   1230   Elf64_Xword r_info;   // Symbol table index and type of relocation to apply.
   1231 
   1232   // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
   1233   // and ELF64_R_INFO macros defined in the ELF specification:
   1234   Elf64_Word getSymbol() const { return (r_info >> 32); }
   1235   Elf64_Word getType() const {
   1236     return (Elf64_Word) (r_info & 0xffffffffL);
   1237   }
   1238   void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
   1239   void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
   1240   void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
   1241     r_info = ((Elf64_Xword)s << 32) + (t&0xffffffffL);
   1242   }
   1243 };
   1244 
   1245 // Relocation entry with explicit addend.
   1246 struct Elf64_Rela {
   1247   Elf64_Addr  r_offset; // Location (file byte offset, or program virtual addr).
   1248   Elf64_Xword  r_info;   // Symbol table index and type of relocation to apply.
   1249   Elf64_Sxword r_addend; // Compute value for relocatable field by adding this.
   1250 
   1251   // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
   1252   // and ELF64_R_INFO macros defined in the ELF specification:
   1253   Elf64_Word getSymbol() const { return (r_info >> 32); }
   1254   Elf64_Word getType() const {
   1255     return (Elf64_Word) (r_info & 0xffffffffL);
   1256   }
   1257   void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
   1258   void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
   1259   void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
   1260     r_info = ((Elf64_Xword)s << 32) + (t&0xffffffffL);
   1261   }
   1262 };
   1263 
   1264 // Program header for ELF32.
   1265 struct Elf32_Phdr {
   1266   Elf32_Word p_type;   // Type of segment
   1267   Elf32_Off  p_offset; // File offset where segment is located, in bytes
   1268   Elf32_Addr p_vaddr;  // Virtual address of beginning of segment
   1269   Elf32_Addr p_paddr;  // Physical address of beginning of segment (OS-specific)
   1270   Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
   1271   Elf32_Word p_memsz;  // Num. of bytes in mem image of segment (may be zero)
   1272   Elf32_Word p_flags;  // Segment flags
   1273   Elf32_Word p_align;  // Segment alignment constraint
   1274 };
   1275 
   1276 // Program header for ELF64.
   1277 struct Elf64_Phdr {
   1278   Elf64_Word   p_type;   // Type of segment
   1279   Elf64_Word   p_flags;  // Segment flags
   1280   Elf64_Off    p_offset; // File offset where segment is located, in bytes
   1281   Elf64_Addr   p_vaddr;  // Virtual address of beginning of segment
   1282   Elf64_Addr   p_paddr;  // Physical addr of beginning of segment (OS-specific)
   1283   Elf64_Xword  p_filesz; // Num. of bytes in file image of segment (may be zero)
   1284   Elf64_Xword  p_memsz;  // Num. of bytes in mem image of segment (may be zero)
   1285   Elf64_Xword  p_align;  // Segment alignment constraint
   1286 };
   1287 
   1288 // Segment types.
   1289 enum {
   1290   PT_NULL    = 0, // Unused segment.
   1291   PT_LOAD    = 1, // Loadable segment.
   1292   PT_DYNAMIC = 2, // Dynamic linking information.
   1293   PT_INTERP  = 3, // Interpreter pathname.
   1294   PT_NOTE    = 4, // Auxiliary information.
   1295   PT_SHLIB   = 5, // Reserved.
   1296   PT_PHDR    = 6, // The program header table itself.
   1297   PT_TLS     = 7, // The thread-local storage template.
   1298   PT_LOOS    = 0x60000000, // Lowest operating system-specific pt entry type.
   1299   PT_HIOS    = 0x6fffffff, // Highest operating system-specific pt entry type.
   1300   PT_LOPROC  = 0x70000000, // Lowest processor-specific program hdr entry type.
   1301   PT_HIPROC  = 0x7fffffff, // Highest processor-specific program hdr entry type.
   1302 
   1303   // x86-64 program header types.
   1304   // These all contain stack unwind tables.
   1305   PT_GNU_EH_FRAME  = 0x6474e550,
   1306   PT_SUNW_EH_FRAME = 0x6474e550,
   1307   PT_SUNW_UNWIND   = 0x6464e550,
   1308 
   1309   PT_GNU_STACK  = 0x6474e551, // Indicates stack executability.
   1310   PT_GNU_RELRO  = 0x6474e552, // Read-only after relocation.
   1311 
   1312   // ARM program header types.
   1313   PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info
   1314   // These all contain stack unwind tables.
   1315   PT_ARM_EXIDX   = 0x70000001,
   1316   PT_ARM_UNWIND  = 0x70000001
   1317 };
   1318 
   1319 // Segment flag bits.
   1320 enum {
   1321   PF_X        = 1,         // Execute
   1322   PF_W        = 2,         // Write
   1323   PF_R        = 4,         // Read
   1324   PF_MASKOS   = 0x0ff00000,// Bits for operating system-specific semantics.
   1325   PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics.
   1326 };
   1327 
   1328 // Dynamic table entry for ELF32.
   1329 struct Elf32_Dyn
   1330 {
   1331   Elf32_Sword d_tag;            // Type of dynamic table entry.
   1332   union
   1333   {
   1334       Elf32_Word d_val;         // Integer value of entry.
   1335       Elf32_Addr d_ptr;         // Pointer value of entry.
   1336   } d_un;
   1337 };
   1338 
   1339 // Dynamic table entry for ELF64.
   1340 struct Elf64_Dyn
   1341 {
   1342   Elf64_Sxword d_tag;           // Type of dynamic table entry.
   1343   union
   1344   {
   1345       Elf64_Xword d_val;        // Integer value of entry.
   1346       Elf64_Addr  d_ptr;        // Pointer value of entry.
   1347   } d_un;
   1348 };
   1349 
   1350 // Dynamic table entry tags.
   1351 enum {
   1352   DT_NULL         = 0,        // Marks end of dynamic array.
   1353   DT_NEEDED       = 1,        // String table offset of needed library.
   1354   DT_PLTRELSZ     = 2,        // Size of relocation entries in PLT.
   1355   DT_PLTGOT       = 3,        // Address associated with linkage table.
   1356   DT_HASH         = 4,        // Address of symbolic hash table.
   1357   DT_STRTAB       = 5,        // Address of dynamic string table.
   1358   DT_SYMTAB       = 6,        // Address of dynamic symbol table.
   1359   DT_RELA         = 7,        // Address of relocation table (Rela entries).
   1360   DT_RELASZ       = 8,        // Size of Rela relocation table.
   1361   DT_RELAENT      = 9,        // Size of a Rela relocation entry.
   1362   DT_STRSZ        = 10,       // Total size of the string table.
   1363   DT_SYMENT       = 11,       // Size of a symbol table entry.
   1364   DT_INIT         = 12,       // Address of initialization function.
   1365   DT_FINI         = 13,       // Address of termination function.
   1366   DT_SONAME       = 14,       // String table offset of a shared objects name.
   1367   DT_RPATH        = 15,       // String table offset of library search path.
   1368   DT_SYMBOLIC     = 16,       // Changes symbol resolution algorithm.
   1369   DT_REL          = 17,       // Address of relocation table (Rel entries).
   1370   DT_RELSZ        = 18,       // Size of Rel relocation table.
   1371   DT_RELENT       = 19,       // Size of a Rel relocation entry.
   1372   DT_PLTREL       = 20,       // Type of relocation entry used for linking.
   1373   DT_DEBUG        = 21,       // Reserved for debugger.
   1374   DT_TEXTREL      = 22,       // Relocations exist for non-writable segments.
   1375   DT_JMPREL       = 23,       // Address of relocations associated with PLT.
   1376   DT_BIND_NOW     = 24,       // Process all relocations before execution.
   1377   DT_INIT_ARRAY   = 25,       // Pointer to array of initialization functions.
   1378   DT_FINI_ARRAY   = 26,       // Pointer to array of termination functions.
   1379   DT_INIT_ARRAYSZ = 27,       // Size of DT_INIT_ARRAY.
   1380   DT_FINI_ARRAYSZ = 28,       // Size of DT_FINI_ARRAY.
   1381   DT_RUNPATH      = 29,       // String table offset of lib search path.
   1382   DT_FLAGS        = 30,       // Flags.
   1383   DT_ENCODING     = 32,       // Values from here to DT_LOOS follow the rules
   1384                               // for the interpretation of the d_un union.
   1385 
   1386   DT_PREINIT_ARRAY = 32,      // Pointer to array of preinit functions.
   1387   DT_PREINIT_ARRAYSZ = 33,    // Size of the DT_PREINIT_ARRAY array.
   1388 
   1389   DT_LOOS         = 0x60000000, // Start of environment specific tags.
   1390   DT_HIOS         = 0x6FFFFFFF, // End of environment specific tags.
   1391   DT_LOPROC       = 0x70000000, // Start of processor specific tags.
   1392   DT_HIPROC       = 0x7FFFFFFF, // End of processor specific tags.
   1393 
   1394   DT_RELACOUNT    = 0x6FFFFFF9, // ELF32_Rela count.
   1395   DT_RELCOUNT     = 0x6FFFFFFA, // ELF32_Rel count.
   1396 
   1397   DT_FLAGS_1      = 0X6FFFFFFB, // Flags_1.
   1398   DT_VERDEF       = 0X6FFFFFFC, // The address of the version definition table.
   1399   DT_VERDEFNUM    = 0X6FFFFFFD, // The number of entries in DT_VERDEF.
   1400   DT_VERNEED      = 0X6FFFFFFE, // The address of the version Dependency table.
   1401   DT_VERNEEDNUM   = 0X6FFFFFFF  // The number of entries in DT_VERNEED.
   1402 };
   1403 
   1404 // DT_FLAGS values.
   1405 enum {
   1406   DF_ORIGIN     = 0x01, // The object may reference $ORIGIN.
   1407   DF_SYMBOLIC   = 0x02, // Search the shared lib before searching the exe.
   1408   DF_TEXTREL    = 0x04, // Relocations may modify a non-writable segment.
   1409   DF_BIND_NOW   = 0x08, // Process all relocations on load.
   1410   DF_STATIC_TLS = 0x10  // Reject attempts to load dynamically.
   1411 };
   1412 
   1413 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry.
   1414 enum {
   1415   DF_1_NOW        = 0x00000001, // Set RTLD_NOW for this object.
   1416   DF_1_GLOBAL     = 0x00000002, // Set RTLD_GLOBAL for this object.
   1417   DF_1_GROUP      = 0x00000004, // Set RTLD_GROUP for this object.
   1418   DF_1_NODELETE   = 0x00000008, // Set RTLD_NODELETE for this object.
   1419   DF_1_LOADFLTR   = 0x00000010, // Trigger filtee loading at runtime.
   1420   DF_1_INITFIRST  = 0x00000020, // Set RTLD_INITFIRST for this object.
   1421   DF_1_NOOPEN     = 0x00000040, // Set RTLD_NOOPEN for this object.
   1422   DF_1_ORIGIN     = 0x00000080, // $ORIGIN must be handled.
   1423   DF_1_DIRECT     = 0x00000100, // Direct binding enabled.
   1424   DF_1_TRANS      = 0x00000200,
   1425   DF_1_INTERPOSE  = 0x00000400, // Object is used to interpose.
   1426   DF_1_NODEFLIB   = 0x00000800, // Ignore default lib search path.
   1427   DF_1_NODUMP     = 0x00001000, // Object can't be dldump'ed.
   1428   DF_1_CONFALT    = 0x00002000, // Configuration alternative created.
   1429   DF_1_ENDFILTEE  = 0x00004000, // Filtee terminates filters search.
   1430   DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time.
   1431   DF_1_DISPRELPND = 0x00010000  // Disp reloc applied at run-time.
   1432 };
   1433 
   1434 // ElfXX_VerDef structure version (GNU versioning)
   1435 enum {
   1436   VER_DEF_NONE    = 0,
   1437   VER_DEF_CURRENT = 1
   1438 };
   1439 
   1440 // VerDef Flags (ElfXX_VerDef::vd_flags)
   1441 enum {
   1442   VER_FLG_BASE = 0x1,
   1443   VER_FLG_WEAK = 0x2,
   1444   VER_FLG_INFO = 0x4
   1445 };
   1446 
   1447 // Special constants for the version table. (SHT_GNU_versym/.gnu.version)
   1448 enum {
   1449   VER_NDX_LOCAL  = 0,      // Unversioned local symbol
   1450   VER_NDX_GLOBAL = 1,      // Unversioned global symbol
   1451   VERSYM_VERSION = 0x7fff, // Version Index mask
   1452   VERSYM_HIDDEN  = 0x8000  // Hidden bit (non-default version)
   1453 };
   1454 
   1455 // ElfXX_VerNeed structure version (GNU versioning)
   1456 enum {
   1457   VER_NEED_NONE = 0,
   1458   VER_NEED_CURRENT = 1
   1459 };
   1460 
   1461 } // end namespace ELF
   1462 
   1463 } // end namespace llvm
   1464 
   1465 #endif
   1466