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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  // BEGIN android-changed
21  #ifndef ART_RUNTIME_ELF_H_
22  #define ART_RUNTIME_ELF_H_
23  // END android-changed
24  
25  // BEGIN android-changed
26  #include <stdint.h>
27  #include <string.h>
28  // END android-changed
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  // BEGIN android-added for <elf.h> compat
63  const char ELFMAG0 = ElfMagic[EI_MAG0];
64  const char ELFMAG1 = ElfMagic[EI_MAG1];
65  const char ELFMAG2 = ElfMagic[EI_MAG2];
66  const char ELFMAG3 = ElfMagic[EI_MAG3];
67  // END android-added for <elf.h> compat
68  
69  struct Elf32_Ehdr {
70    unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes
71    Elf32_Half    e_type;      // Type of file (see ET_* below)
72    Elf32_Half    e_machine;   // Required architecture for this file (see EM_*)
73    Elf32_Word    e_version;   // Must be equal to 1
74    Elf32_Addr    e_entry;     // Address to jump to in order to start program
75    Elf32_Off     e_phoff;     // Program header table's file offset, in bytes
76    Elf32_Off     e_shoff;     // Section header table's file offset, in bytes
77    Elf32_Word    e_flags;     // Processor-specific flags
78    Elf32_Half    e_ehsize;    // Size of ELF header, in bytes
79    Elf32_Half    e_phentsize; // Size of an entry in the program header table
80    Elf32_Half    e_phnum;     // Number of entries in the program header table
81    Elf32_Half    e_shentsize; // Size of an entry in the section header table
82    Elf32_Half    e_shnum;     // Number of entries in the section header table
83    Elf32_Half    e_shstrndx;  // Sect hdr table index of sect name string table
checkMagicElf32_Ehdr84    bool checkMagic() const {
85      return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
86    }
getFileClassElf32_Ehdr87    unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
getDataEncodingElf32_Ehdr88    unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
89  };
90  
91  // 64-bit ELF header. Fields are the same as for ELF32, but with different
92  // types (see above).
93  struct Elf64_Ehdr {
94    unsigned char e_ident[EI_NIDENT];
95    Elf64_Half    e_type;
96    Elf64_Half    e_machine;
97    Elf64_Word    e_version;
98    Elf64_Addr    e_entry;
99    Elf64_Off     e_phoff;
100    Elf64_Off     e_shoff;
101    Elf64_Word    e_flags;
102    Elf64_Half    e_ehsize;
103    Elf64_Half    e_phentsize;
104    Elf64_Half    e_phnum;
105    Elf64_Half    e_shentsize;
106    Elf64_Half    e_shnum;
107    Elf64_Half    e_shstrndx;
checkMagicElf64_Ehdr108    bool checkMagic() const {
109      return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
110    }
getFileClassElf64_Ehdr111    unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
getDataEncodingElf64_Ehdr112    unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
113  };
114  
115  // File types
116  enum {
117    ET_NONE   = 0,      // No file type
118    ET_REL    = 1,      // Relocatable file
119    ET_EXEC   = 2,      // Executable file
120    ET_DYN    = 3,      // Shared object file
121    ET_CORE   = 4,      // Core file
122    ET_LOPROC = 0xff00, // Beginning of processor-specific codes
123    ET_HIPROC = 0xffff  // Processor-specific
124  };
125  
126  // Versioning
127  enum {
128    EV_NONE = 0,
129    EV_CURRENT = 1
130  };
131  
132  // Machine architectures
133  enum {
134    EM_NONE          = 0, // No machine
135    EM_M32           = 1, // AT&T WE 32100
136    EM_SPARC         = 2, // SPARC
137    EM_386           = 3, // Intel 386
138    EM_68K           = 4, // Motorola 68000
139    EM_88K           = 5, // Motorola 88000
140    EM_486           = 6, // Intel 486 (deprecated)
141    EM_860           = 7, // Intel 80860
142    EM_MIPS          = 8, // MIPS R3000
143    EM_S370          = 9, // IBM System/370
144    EM_MIPS_RS3_LE   = 10, // MIPS RS3000 Little-endian
145    EM_PARISC        = 15, // Hewlett-Packard PA-RISC
146    EM_VPP500        = 17, // Fujitsu VPP500
147    EM_SPARC32PLUS   = 18, // Enhanced instruction set SPARC
148    EM_960           = 19, // Intel 80960
149    EM_PPC           = 20, // PowerPC
150    EM_PPC64         = 21, // PowerPC64
151    EM_S390          = 22, // IBM System/390
152    EM_SPU           = 23, // IBM SPU/SPC
153    EM_V800          = 36, // NEC V800
154    EM_FR20          = 37, // Fujitsu FR20
155    EM_RH32          = 38, // TRW RH-32
156    EM_RCE           = 39, // Motorola RCE
157    EM_ARM           = 40, // ARM
158    EM_ALPHA         = 41, // DEC Alpha
159    EM_SH            = 42, // Hitachi SH
160    EM_SPARCV9       = 43, // SPARC V9
161    EM_TRICORE       = 44, // Siemens TriCore
162    EM_ARC           = 45, // Argonaut RISC Core
163    EM_H8_300        = 46, // Hitachi H8/300
164    EM_H8_300H       = 47, // Hitachi H8/300H
165    EM_H8S           = 48, // Hitachi H8S
166    EM_H8_500        = 49, // Hitachi H8/500
167    EM_IA_64         = 50, // Intel IA-64 processor architecture
168    EM_MIPS_X        = 51, // Stanford MIPS-X
169    EM_COLDFIRE      = 52, // Motorola ColdFire
170    EM_68HC12        = 53, // Motorola M68HC12
171    EM_MMA           = 54, // Fujitsu MMA Multimedia Accelerator
172    EM_PCP           = 55, // Siemens PCP
173    EM_NCPU          = 56, // Sony nCPU embedded RISC processor
174    EM_NDR1          = 57, // Denso NDR1 microprocessor
175    EM_STARCORE      = 58, // Motorola Star*Core processor
176    EM_ME16          = 59, // Toyota ME16 processor
177    EM_ST100         = 60, // STMicroelectronics ST100 processor
178    EM_TINYJ         = 61, // Advanced Logic Corp. TinyJ embedded processor family
179    EM_X86_64        = 62, // AMD x86-64 architecture
180    EM_PDSP          = 63, // Sony DSP Processor
181    EM_PDP10         = 64, // Digital Equipment Corp. PDP-10
182    EM_PDP11         = 65, // Digital Equipment Corp. PDP-11
183    EM_FX66          = 66, // Siemens FX66 microcontroller
184    EM_ST9PLUS       = 67, // STMicroelectronics ST9+ 8/16 bit microcontroller
185    EM_ST7           = 68, // STMicroelectronics ST7 8-bit microcontroller
186    EM_68HC16        = 69, // Motorola MC68HC16 Microcontroller
187    EM_68HC11        = 70, // Motorola MC68HC11 Microcontroller
188    EM_68HC08        = 71, // Motorola MC68HC08 Microcontroller
189    EM_68HC05        = 72, // Motorola MC68HC05 Microcontroller
190    EM_SVX           = 73, // Silicon Graphics SVx
191    EM_ST19          = 74, // STMicroelectronics ST19 8-bit microcontroller
192    EM_VAX           = 75, // Digital VAX
193    EM_CRIS          = 76, // Axis Communications 32-bit embedded processor
194    EM_JAVELIN       = 77, // Infineon Technologies 32-bit embedded processor
195    EM_FIREPATH      = 78, // Element 14 64-bit DSP Processor
196    EM_ZSP           = 79, // LSI Logic 16-bit DSP Processor
197    EM_MMIX          = 80, // Donald Knuth's educational 64-bit processor
198    EM_HUANY         = 81, // Harvard University machine-independent object files
199    EM_PRISM         = 82, // SiTera Prism
200    EM_AVR           = 83, // Atmel AVR 8-bit microcontroller
201    EM_FR30          = 84, // Fujitsu FR30
202    EM_D10V          = 85, // Mitsubishi D10V
203    EM_D30V          = 86, // Mitsubishi D30V
204    EM_V850          = 87, // NEC v850
205    EM_M32R          = 88, // Mitsubishi M32R
206    EM_MN10300       = 89, // Matsushita MN10300
207    EM_MN10200       = 90, // Matsushita MN10200
208    EM_PJ            = 91, // picoJava
209    EM_OPENRISC      = 92, // OpenRISC 32-bit embedded processor
210    EM_ARC_COMPACT   = 93, // ARC International ARCompact processor (old
211                           // spelling/synonym: EM_ARC_A5)
212    EM_XTENSA        = 94, // Tensilica Xtensa Architecture
213    EM_VIDEOCORE     = 95, // Alphamosaic VideoCore processor
214    EM_TMM_GPP       = 96, // Thompson Multimedia General Purpose Processor
215    EM_NS32K         = 97, // National Semiconductor 32000 series
216    EM_TPC           = 98, // Tenor Network TPC processor
217    EM_SNP1K         = 99, // Trebia SNP 1000 processor
218    EM_ST200         = 100, // STMicroelectronics (www.st.com) ST200
219    EM_IP2K          = 101, // Ubicom IP2xxx microcontroller family
220    EM_MAX           = 102, // MAX Processor
221    EM_CR            = 103, // National Semiconductor CompactRISC microprocessor
222    EM_F2MC16        = 104, // Fujitsu F2MC16
223    EM_MSP430        = 105, // Texas Instruments embedded microcontroller msp430
224    EM_BLACKFIN      = 106, // Analog Devices Blackfin (DSP) processor
225    EM_SE_C33        = 107, // S1C33 Family of Seiko Epson processors
226    EM_SEP           = 108, // Sharp embedded microprocessor
227    EM_ARCA          = 109, // Arca RISC Microprocessor
228    EM_UNICORE       = 110, // Microprocessor series from PKU-Unity Ltd. and MPRC
229                            // of Peking University
230    EM_EXCESS        = 111, // eXcess: 16/32/64-bit configurable embedded CPU
231    EM_DXP           = 112, // Icera Semiconductor Inc. Deep Execution Processor
232    EM_ALTERA_NIOS2  = 113, // Altera Nios II soft-core processor
233    EM_CRX           = 114, // National Semiconductor CompactRISC CRX
234    EM_XGATE         = 115, // Motorola XGATE embedded processor
235    EM_C166          = 116, // Infineon C16x/XC16x processor
236    EM_M16C          = 117, // Renesas M16C series microprocessors
237    EM_DSPIC30F      = 118, // Microchip Technology dsPIC30F Digital Signal
238                            // Controller
239    EM_CE            = 119, // Freescale Communication Engine RISC core
240    EM_M32C          = 120, // Renesas M32C series microprocessors
241    EM_TSK3000       = 131, // Altium TSK3000 core
242    EM_RS08          = 132, // Freescale RS08 embedded processor
243    EM_SHARC         = 133, // Analog Devices SHARC family of 32-bit DSP
244                            // processors
245    EM_ECOG2         = 134, // Cyan Technology eCOG2 microprocessor
246    EM_SCORE7        = 135, // Sunplus S+core7 RISC processor
247    EM_DSP24         = 136, // New Japan Radio (NJR) 24-bit DSP Processor
248    EM_VIDEOCORE3    = 137, // Broadcom VideoCore III processor
249    EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture
250    EM_SE_C17        = 139, // Seiko Epson C17 family
251    EM_TI_C6000      = 140, // The Texas Instruments TMS320C6000 DSP family
252    EM_TI_C2000      = 141, // The Texas Instruments TMS320C2000 DSP family
253    EM_TI_C5500      = 142, // The Texas Instruments TMS320C55x DSP family
254    EM_MMDSP_PLUS    = 160, // STMicroelectronics 64bit VLIW Data Signal Processor
255    EM_CYPRESS_M8C   = 161, // Cypress M8C microprocessor
256    EM_R32C          = 162, // Renesas R32C series microprocessors
257    EM_TRIMEDIA      = 163, // NXP Semiconductors TriMedia architecture family
258    EM_HEXAGON       = 164, // Qualcomm Hexagon processor
259    EM_8051          = 165, // Intel 8051 and variants
260    EM_STXP7X        = 166, // STMicroelectronics STxP7x family of configurable
261                            // and extensible RISC processors
262    EM_NDS32         = 167, // Andes Technology compact code size embedded RISC
263                            // processor family
264    EM_ECOG1         = 168, // Cyan Technology eCOG1X family
265    EM_ECOG1X        = 168, // Cyan Technology eCOG1X family
266    EM_MAXQ30        = 169, // Dallas Semiconductor MAXQ30 Core Micro-controllers
267    EM_XIMO16        = 170, // New Japan Radio (NJR) 16-bit DSP Processor
268    EM_MANIK         = 171, // M2000 Reconfigurable RISC Microprocessor
269    EM_CRAYNV2       = 172, // Cray Inc. NV2 vector architecture
270    EM_RX            = 173, // Renesas RX family
271    EM_METAG         = 174, // Imagination Technologies META processor
272                            // architecture
273    EM_MCST_ELBRUS   = 175, // MCST Elbrus general purpose hardware architecture
274    EM_ECOG16        = 176, // Cyan Technology eCOG16 family
275    EM_CR16          = 177, // National Semiconductor CompactRISC CR16 16-bit
276                            // microprocessor
277    EM_ETPU          = 178, // Freescale Extended Time Processing Unit
278    EM_SLE9X         = 179, // Infineon Technologies SLE9X core
279    EM_L10M          = 180, // Intel L10M
280    EM_K10M          = 181, // Intel K10M
281    EM_AARCH64       = 183, // ARM AArch64
282    EM_AVR32         = 185, // Atmel Corporation 32-bit microprocessor family
283    EM_STM8          = 186, // STMicroeletronics STM8 8-bit microcontroller
284    EM_TILE64        = 187, // Tilera TILE64 multicore architecture family
285    EM_TILEPRO       = 188, // Tilera TILEPro multicore architecture family
286    EM_CUDA          = 190, // NVIDIA CUDA architecture
287    EM_TILEGX        = 191, // Tilera TILE-Gx multicore architecture family
288    EM_CLOUDSHIELD   = 192, // CloudShield architecture family
289    EM_COREA_1ST     = 193, // KIPO-KAIST Core-A 1st generation processor family
290    EM_COREA_2ND     = 194, // KIPO-KAIST Core-A 2nd generation processor family
291    EM_ARC_COMPACT2  = 195, // Synopsys ARCompact V2
292    EM_OPEN8         = 196, // Open8 8-bit RISC soft processor core
293    EM_RL78          = 197, // Renesas RL78 family
294    EM_VIDEOCORE5    = 198, // Broadcom VideoCore V processor
295    EM_78KOR         = 199, // Renesas 78KOR family
296    EM_56800EX       = 200  // Freescale 56800EX Digital Signal Controller (DSC)
297  };
298  
299  // Object file classes.
300  enum {
301    ELFCLASSNONE = 0,
302    ELFCLASS32 = 1, // 32-bit object file
303    ELFCLASS64 = 2  // 64-bit object file
304  };
305  
306  // Object file byte orderings.
307  enum {
308    ELFDATANONE = 0, // Invalid data encoding.
309    ELFDATA2LSB = 1, // Little-endian object file
310    ELFDATA2MSB = 2  // Big-endian object file
311  };
312  
313  // OS ABI identification.
314  enum {
315    ELFOSABI_NONE = 0,          // UNIX System V ABI
316    ELFOSABI_HPUX = 1,          // HP-UX operating system
317    ELFOSABI_NETBSD = 2,        // NetBSD
318    ELFOSABI_GNU = 3,           // GNU/Linux
319    ELFOSABI_LINUX = 3,         // Historical alias for ELFOSABI_GNU.
320    ELFOSABI_HURD = 4,          // GNU/Hurd
321    ELFOSABI_SOLARIS = 6,       // Solaris
322    ELFOSABI_AIX = 7,           // AIX
323    ELFOSABI_IRIX = 8,          // IRIX
324    ELFOSABI_FREEBSD = 9,       // FreeBSD
325    ELFOSABI_TRU64 = 10,        // TRU64 UNIX
326    ELFOSABI_MODESTO = 11,      // Novell Modesto
327    ELFOSABI_OPENBSD = 12,      // OpenBSD
328    ELFOSABI_OPENVMS = 13,      // OpenVMS
329    ELFOSABI_NSK = 14,          // Hewlett-Packard Non-Stop Kernel
330    ELFOSABI_AROS = 15,         // AROS
331    ELFOSABI_FENIXOS = 16,      // FenixOS
332    ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
333    ELFOSABI_C6000_LINUX = 65,  // Linux TMS320C6000
334    ELFOSABI_ARM = 97,          // ARM
335    ELFOSABI_STANDALONE = 255   // Standalone (embedded) application
336  };
337  
338  // X86_64 relocations.
339  enum {
340    R_X86_64_NONE       = 0,
341    R_X86_64_64         = 1,
342    R_X86_64_PC32       = 2,
343    R_X86_64_GOT32      = 3,
344    R_X86_64_PLT32      = 4,
345    R_X86_64_COPY       = 5,
346    R_X86_64_GLOB_DAT   = 6,
347    R_X86_64_JUMP_SLOT  = 7,
348    R_X86_64_RELATIVE   = 8,
349    R_X86_64_GOTPCREL   = 9,
350    R_X86_64_32         = 10,
351    R_X86_64_32S        = 11,
352    R_X86_64_16         = 12,
353    R_X86_64_PC16       = 13,
354    R_X86_64_8          = 14,
355    R_X86_64_PC8        = 15,
356    R_X86_64_DTPMOD64   = 16,
357    R_X86_64_DTPOFF64   = 17,
358    R_X86_64_TPOFF64    = 18,
359    R_X86_64_TLSGD      = 19,
360    R_X86_64_TLSLD      = 20,
361    R_X86_64_DTPOFF32   = 21,
362    R_X86_64_GOTTPOFF   = 22,
363    R_X86_64_TPOFF32    = 23,
364    R_X86_64_PC64       = 24,
365    R_X86_64_GOTOFF64   = 25,
366    R_X86_64_GOTPC32    = 26,
367    R_X86_64_GOT64      = 27,
368    R_X86_64_GOTPCREL64 = 28,
369    R_X86_64_GOTPC64    = 29,
370    R_X86_64_GOTPLT64   = 30,
371    R_X86_64_PLTOFF64   = 31,
372    R_X86_64_SIZE32     = 32,
373    R_X86_64_SIZE64     = 33,
374    R_X86_64_GOTPC32_TLSDESC = 34,
375    R_X86_64_TLSDESC_CALL    = 35,
376    R_X86_64_TLSDESC    = 36,
377    R_X86_64_IRELATIVE  = 37
378  };
379  
380  // i386 relocations.
381  // TODO: this is just a subset
382  enum {
383    R_386_NONE          = 0,
384    R_386_32            = 1,
385    R_386_PC32          = 2,
386    R_386_GOT32         = 3,
387    R_386_PLT32         = 4,
388    R_386_COPY          = 5,
389    R_386_GLOB_DAT      = 6,
390    R_386_JUMP_SLOT     = 7,
391    R_386_RELATIVE      = 8,
392    R_386_GOTOFF        = 9,
393    R_386_GOTPC         = 10,
394    R_386_32PLT         = 11,
395    R_386_TLS_TPOFF     = 14,
396    R_386_TLS_IE        = 15,
397    R_386_TLS_GOTIE     = 16,
398    R_386_TLS_LE        = 17,
399    R_386_TLS_GD        = 18,
400    R_386_TLS_LDM       = 19,
401    R_386_16            = 20,
402    R_386_PC16          = 21,
403    R_386_8             = 22,
404    R_386_PC8           = 23,
405    R_386_TLS_GD_32     = 24,
406    R_386_TLS_GD_PUSH   = 25,
407    R_386_TLS_GD_CALL   = 26,
408    R_386_TLS_GD_POP    = 27,
409    R_386_TLS_LDM_32    = 28,
410    R_386_TLS_LDM_PUSH  = 29,
411    R_386_TLS_LDM_CALL  = 30,
412    R_386_TLS_LDM_POP   = 31,
413    R_386_TLS_LDO_32    = 32,
414    R_386_TLS_IE_32     = 33,
415    R_386_TLS_LE_32     = 34,
416    R_386_TLS_DTPMOD32  = 35,
417    R_386_TLS_DTPOFF32  = 36,
418    R_386_TLS_TPOFF32   = 37,
419    R_386_TLS_GOTDESC   = 39,
420    R_386_TLS_DESC_CALL = 40,
421    R_386_TLS_DESC      = 41,
422    R_386_IRELATIVE     = 42,
423    R_386_NUM           = 43
424  };
425  
426  // ELF Relocation types for PPC32
427  enum {
428    R_PPC_NONE                  = 0,      /* No relocation. */
429    R_PPC_ADDR32                = 1,
430    R_PPC_ADDR24                = 2,
431    R_PPC_ADDR16                = 3,
432    R_PPC_ADDR16_LO             = 4,
433    R_PPC_ADDR16_HI             = 5,
434    R_PPC_ADDR16_HA             = 6,
435    R_PPC_ADDR14                = 7,
436    R_PPC_ADDR14_BRTAKEN        = 8,
437    R_PPC_ADDR14_BRNTAKEN       = 9,
438    R_PPC_REL24                 = 10,
439    R_PPC_REL14                 = 11,
440    R_PPC_REL14_BRTAKEN         = 12,
441    R_PPC_REL14_BRNTAKEN        = 13,
442    R_PPC_GOT16                 = 14,
443    R_PPC_GOT16_LO              = 15,
444    R_PPC_GOT16_HI              = 16,
445    R_PPC_GOT16_HA              = 17,
446    R_PPC_REL32                 = 26,
447    R_PPC_TLS                   = 67,
448    R_PPC_DTPMOD32              = 68,
449    R_PPC_TPREL16               = 69,
450    R_PPC_TPREL16_LO            = 70,
451    R_PPC_TPREL16_HI            = 71,
452    R_PPC_TPREL16_HA            = 72,
453    R_PPC_TPREL32               = 73,
454    R_PPC_DTPREL16              = 74,
455    R_PPC_DTPREL16_LO           = 75,
456    R_PPC_DTPREL16_HI           = 76,
457    R_PPC_DTPREL16_HA           = 77,
458    R_PPC_DTPREL32              = 78,
459    R_PPC_GOT_TLSGD16           = 79,
460    R_PPC_GOT_TLSGD16_LO        = 80,
461    R_PPC_GOT_TLSGD16_HI        = 81,
462    R_PPC_GOT_TLSGD16_HA        = 82,
463    R_PPC_GOT_TLSLD16           = 83,
464    R_PPC_GOT_TLSLD16_LO        = 84,
465    R_PPC_GOT_TLSLD16_HI        = 85,
466    R_PPC_GOT_TLSLD16_HA        = 86,
467    R_PPC_GOT_TPREL16           = 87,
468    R_PPC_GOT_TPREL16_LO        = 88,
469    R_PPC_GOT_TPREL16_HI        = 89,
470    R_PPC_GOT_TPREL16_HA        = 90,
471    R_PPC_GOT_DTPREL16          = 91,
472    R_PPC_GOT_DTPREL16_LO       = 92,
473    R_PPC_GOT_DTPREL16_HI       = 93,
474    R_PPC_GOT_DTPREL16_HA       = 94,
475    R_PPC_TLSGD                 = 95,
476    R_PPC_TLSLD                 = 96,
477    R_PPC_REL16                 = 249,
478    R_PPC_REL16_LO              = 250,
479    R_PPC_REL16_HI              = 251,
480    R_PPC_REL16_HA              = 252
481  };
482  
483  // ELF Relocation types for PPC64
484  enum {
485    R_PPC64_NONE                = 0,
486    R_PPC64_ADDR32              = 1,
487    R_PPC64_ADDR24              = 2,
488    R_PPC64_ADDR16              = 3,
489    R_PPC64_ADDR16_LO           = 4,
490    R_PPC64_ADDR16_HI           = 5,
491    R_PPC64_ADDR16_HA           = 6,
492    R_PPC64_ADDR14              = 7,
493    R_PPC64_ADDR14_BRTAKEN      = 8,
494    R_PPC64_ADDR14_BRNTAKEN     = 9,
495    R_PPC64_REL24               = 10,
496    R_PPC64_REL14               = 11,
497    R_PPC64_REL14_BRTAKEN       = 12,
498    R_PPC64_REL14_BRNTAKEN      = 13,
499    R_PPC64_GOT16               = 14,
500    R_PPC64_GOT16_LO            = 15,
501    R_PPC64_GOT16_HI            = 16,
502    R_PPC64_GOT16_HA            = 17,
503    R_PPC64_REL32               = 26,
504    R_PPC64_ADDR64              = 38,
505    R_PPC64_ADDR16_HIGHER       = 39,
506    R_PPC64_ADDR16_HIGHERA      = 40,
507    R_PPC64_ADDR16_HIGHEST      = 41,
508    R_PPC64_ADDR16_HIGHESTA     = 42,
509    R_PPC64_REL64               = 44,
510    R_PPC64_TOC16               = 47,
511    R_PPC64_TOC16_LO            = 48,
512    R_PPC64_TOC16_HI            = 49,
513    R_PPC64_TOC16_HA            = 50,
514    R_PPC64_TOC                 = 51,
515    R_PPC64_ADDR16_DS           = 56,
516    R_PPC64_ADDR16_LO_DS        = 57,
517    R_PPC64_GOT16_DS            = 58,
518    R_PPC64_GOT16_LO_DS         = 59,
519    R_PPC64_TOC16_DS            = 63,
520    R_PPC64_TOC16_LO_DS         = 64,
521    R_PPC64_TLS                 = 67,
522    R_PPC64_DTPMOD64            = 68,
523    R_PPC64_TPREL16             = 69,
524    R_PPC64_TPREL16_LO          = 70,
525    R_PPC64_TPREL16_HI          = 71,
526    R_PPC64_TPREL16_HA          = 72,
527    R_PPC64_TPREL64             = 73,
528    R_PPC64_DTPREL16            = 74,
529    R_PPC64_DTPREL16_LO         = 75,
530    R_PPC64_DTPREL16_HI         = 76,
531    R_PPC64_DTPREL16_HA         = 77,
532    R_PPC64_DTPREL64            = 78,
533    R_PPC64_GOT_TLSGD16         = 79,
534    R_PPC64_GOT_TLSGD16_LO      = 80,
535    R_PPC64_GOT_TLSGD16_HI      = 81,
536    R_PPC64_GOT_TLSGD16_HA      = 82,
537    R_PPC64_GOT_TLSLD16         = 83,
538    R_PPC64_GOT_TLSLD16_LO      = 84,
539    R_PPC64_GOT_TLSLD16_HI      = 85,
540    R_PPC64_GOT_TLSLD16_HA      = 86,
541    R_PPC64_GOT_TPREL16_DS      = 87,
542    R_PPC64_GOT_TPREL16_LO_DS   = 88,
543    R_PPC64_GOT_TPREL16_HI      = 89,
544    R_PPC64_GOT_TPREL16_HA      = 90,
545    R_PPC64_GOT_DTPREL16_DS     = 91,
546    R_PPC64_GOT_DTPREL16_LO_DS  = 92,
547    R_PPC64_GOT_DTPREL16_HI     = 93,
548    R_PPC64_GOT_DTPREL16_HA     = 94,
549    R_PPC64_TPREL16_DS          = 95,
550    R_PPC64_TPREL16_LO_DS       = 96,
551    R_PPC64_TPREL16_HIGHER      = 97,
552    R_PPC64_TPREL16_HIGHERA     = 98,
553    R_PPC64_TPREL16_HIGHEST     = 99,
554    R_PPC64_TPREL16_HIGHESTA    = 100,
555    R_PPC64_DTPREL16_DS         = 101,
556    R_PPC64_DTPREL16_LO_DS      = 102,
557    R_PPC64_DTPREL16_HIGHER     = 103,
558    R_PPC64_DTPREL16_HIGHERA    = 104,
559    R_PPC64_DTPREL16_HIGHEST    = 105,
560    R_PPC64_DTPREL16_HIGHESTA   = 106,
561    R_PPC64_TLSGD               = 107,
562    R_PPC64_TLSLD               = 108,
563    R_PPC64_REL16               = 249,
564    R_PPC64_REL16_LO            = 250,
565    R_PPC64_REL16_HI            = 251,
566    R_PPC64_REL16_HA            = 252
567  };
568  
569  // ELF Relocation types for AArch64
570  
571  enum {
572    R_AARCH64_NONE                        = 0x100,
573  
574    R_AARCH64_ABS64                       = 0x101,
575    R_AARCH64_ABS32                       = 0x102,
576    R_AARCH64_ABS16                       = 0x103,
577    R_AARCH64_PREL64                      = 0x104,
578    R_AARCH64_PREL32                      = 0x105,
579    R_AARCH64_PREL16                      = 0x106,
580  
581    R_AARCH64_MOVW_UABS_G0                = 0x107,
582    R_AARCH64_MOVW_UABS_G0_NC             = 0x108,
583    R_AARCH64_MOVW_UABS_G1                = 0x109,
584    R_AARCH64_MOVW_UABS_G1_NC             = 0x10a,
585    R_AARCH64_MOVW_UABS_G2                = 0x10b,
586    R_AARCH64_MOVW_UABS_G2_NC             = 0x10c,
587    R_AARCH64_MOVW_UABS_G3                = 0x10d,
588    R_AARCH64_MOVW_SABS_G0                = 0x10e,
589    R_AARCH64_MOVW_SABS_G1                = 0x10f,
590    R_AARCH64_MOVW_SABS_G2                = 0x110,
591  
592    R_AARCH64_LD_PREL_LO19                = 0x111,
593    R_AARCH64_ADR_PREL_LO21               = 0x112,
594    R_AARCH64_ADR_PREL_PG_HI21            = 0x113,
595    R_AARCH64_ADD_ABS_LO12_NC             = 0x115,
596    R_AARCH64_LDST8_ABS_LO12_NC           = 0x116,
597  
598    R_AARCH64_TSTBR14                     = 0x117,
599    R_AARCH64_CONDBR19                    = 0x118,
600    R_AARCH64_JUMP26                      = 0x11a,
601    R_AARCH64_CALL26                      = 0x11b,
602  
603    R_AARCH64_LDST16_ABS_LO12_NC          = 0x11c,
604    R_AARCH64_LDST32_ABS_LO12_NC          = 0x11d,
605    R_AARCH64_LDST64_ABS_LO12_NC          = 0x11e,
606  
607    R_AARCH64_LDST128_ABS_LO12_NC         = 0x12b,
608  
609    R_AARCH64_ADR_GOT_PAGE                = 0x137,
610    R_AARCH64_LD64_GOT_LO12_NC            = 0x138,
611  
612    R_AARCH64_TLSLD_MOVW_DTPREL_G2        = 0x20b,
613    R_AARCH64_TLSLD_MOVW_DTPREL_G1        = 0x20c,
614    R_AARCH64_TLSLD_MOVW_DTPREL_G1_NC     = 0x20d,
615    R_AARCH64_TLSLD_MOVW_DTPREL_G0        = 0x20e,
616    R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC     = 0x20f,
617    R_AARCH64_TLSLD_ADD_DTPREL_HI12       = 0x210,
618    R_AARCH64_TLSLD_ADD_DTPREL_LO12       = 0x211,
619    R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC    = 0x212,
620    R_AARCH64_TLSLD_LDST8_DTPREL_LO12     = 0x213,
621    R_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC  = 0x214,
622    R_AARCH64_TLSLD_LDST16_DTPREL_LO12    = 0x215,
623    R_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC = 0x216,
624    R_AARCH64_TLSLD_LDST32_DTPREL_LO12    = 0x217,
625    R_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC = 0x218,
626    R_AARCH64_TLSLD_LDST64_DTPREL_LO12    = 0x219,
627    R_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC = 0x21a,
628  
629    R_AARCH64_TLSIE_MOVW_GOTTPREL_G1      = 0x21b,
630    R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC   = 0x21c,
631    R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21   = 0x21d,
632    R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC = 0x21e,
633    R_AARCH64_TLSIE_LD_GOTTPREL_PREL19    = 0x21f,
634  
635    R_AARCH64_TLSLE_MOVW_TPREL_G2         = 0x220,
636    R_AARCH64_TLSLE_MOVW_TPREL_G1         = 0x221,
637    R_AARCH64_TLSLE_MOVW_TPREL_G1_NC      = 0x222,
638    R_AARCH64_TLSLE_MOVW_TPREL_G0         = 0x223,
639    R_AARCH64_TLSLE_MOVW_TPREL_G0_NC      = 0x224,
640    R_AARCH64_TLSLE_ADD_TPREL_HI12        = 0x225,
641    R_AARCH64_TLSLE_ADD_TPREL_LO12        = 0x226,
642    R_AARCH64_TLSLE_ADD_TPREL_LO12_NC     = 0x227,
643    R_AARCH64_TLSLE_LDST8_TPREL_LO12      = 0x228,
644    R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC   = 0x229,
645    R_AARCH64_TLSLE_LDST16_TPREL_LO12     = 0x22a,
646    R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC  = 0x22b,
647    R_AARCH64_TLSLE_LDST32_TPREL_LO12     = 0x22c,
648    R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC  = 0x22d,
649    R_AARCH64_TLSLE_LDST64_TPREL_LO12     = 0x22e,
650    R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC  = 0x22f,
651  
652    R_AARCH64_TLSDESC_ADR_PAGE            = 0x232,
653    R_AARCH64_TLSDESC_LD64_LO12_NC        = 0x233,
654    R_AARCH64_TLSDESC_ADD_LO12_NC         = 0x234,
655  
656    R_AARCH64_TLSDESC_CALL                = 0x239
657  };
658  
659  // ARM Specific e_flags
660  enum : unsigned {
661    EF_ARM_SOFT_FLOAT =     0x00000200U,
662    EF_ARM_VFP_FLOAT =      0x00000400U,
663    EF_ARM_EABI_UNKNOWN =   0x00000000U,
664    EF_ARM_EABI_VER1 =      0x01000000U,
665    EF_ARM_EABI_VER2 =      0x02000000U,
666    EF_ARM_EABI_VER3 =      0x03000000U,
667    EF_ARM_EABI_VER4 =      0x04000000U,
668    EF_ARM_EABI_VER5 =      0x05000000U,
669    EF_ARM_EABIMASK =       0xFF000000U
670  };
671  
672  // ELF Relocation types for ARM
673  // Meets 2.08 ABI Specs.
674  
675  enum {
676    R_ARM_NONE                  = 0x00,
677    R_ARM_PC24                  = 0x01,
678    R_ARM_ABS32                 = 0x02,
679    R_ARM_REL32                 = 0x03,
680    R_ARM_LDR_PC_G0             = 0x04,
681    R_ARM_ABS16                 = 0x05,
682    R_ARM_ABS12                 = 0x06,
683    R_ARM_THM_ABS5              = 0x07,
684    R_ARM_ABS8                  = 0x08,
685    R_ARM_SBREL32               = 0x09,
686    R_ARM_THM_CALL              = 0x0a,
687    R_ARM_THM_PC8               = 0x0b,
688    R_ARM_BREL_ADJ              = 0x0c,
689    R_ARM_TLS_DESC              = 0x0d,
690    R_ARM_THM_SWI8              = 0x0e,
691    R_ARM_XPC25                 = 0x0f,
692    R_ARM_THM_XPC22             = 0x10,
693    R_ARM_TLS_DTPMOD32          = 0x11,
694    R_ARM_TLS_DTPOFF32          = 0x12,
695    R_ARM_TLS_TPOFF32           = 0x13,
696    R_ARM_COPY                  = 0x14,
697    R_ARM_GLOB_DAT              = 0x15,
698    R_ARM_JUMP_SLOT             = 0x16,
699    R_ARM_RELATIVE              = 0x17,
700    R_ARM_GOTOFF32              = 0x18,
701    R_ARM_BASE_PREL             = 0x19,
702    R_ARM_GOT_BREL              = 0x1a,
703    R_ARM_PLT32                 = 0x1b,
704    R_ARM_CALL                  = 0x1c,
705    R_ARM_JUMP24                = 0x1d,
706    R_ARM_THM_JUMP24            = 0x1e,
707    R_ARM_BASE_ABS              = 0x1f,
708    R_ARM_ALU_PCREL_7_0         = 0x20,
709    R_ARM_ALU_PCREL_15_8        = 0x21,
710    R_ARM_ALU_PCREL_23_15       = 0x22,
711    R_ARM_LDR_SBREL_11_0_NC     = 0x23,
712    R_ARM_ALU_SBREL_19_12_NC    = 0x24,
713    R_ARM_ALU_SBREL_27_20_CK    = 0x25,
714    R_ARM_TARGET1               = 0x26,
715    R_ARM_SBREL31               = 0x27,
716    R_ARM_V4BX                  = 0x28,
717    R_ARM_TARGET2               = 0x29,
718    R_ARM_PREL31                = 0x2a,
719    R_ARM_MOVW_ABS_NC           = 0x2b,
720    R_ARM_MOVT_ABS              = 0x2c,
721    R_ARM_MOVW_PREL_NC          = 0x2d,
722    R_ARM_MOVT_PREL             = 0x2e,
723    R_ARM_THM_MOVW_ABS_NC       = 0x2f,
724    R_ARM_THM_MOVT_ABS          = 0x30,
725    R_ARM_THM_MOVW_PREL_NC      = 0x31,
726    R_ARM_THM_MOVT_PREL         = 0x32,
727    R_ARM_THM_JUMP19            = 0x33,
728    R_ARM_THM_JUMP6             = 0x34,
729    R_ARM_THM_ALU_PREL_11_0     = 0x35,
730    R_ARM_THM_PC12              = 0x36,
731    R_ARM_ABS32_NOI             = 0x37,
732    R_ARM_REL32_NOI             = 0x38,
733    R_ARM_ALU_PC_G0_NC          = 0x39,
734    R_ARM_ALU_PC_G0             = 0x3a,
735    R_ARM_ALU_PC_G1_NC          = 0x3b,
736    R_ARM_ALU_PC_G1             = 0x3c,
737    R_ARM_ALU_PC_G2             = 0x3d,
738    R_ARM_LDR_PC_G1             = 0x3e,
739    R_ARM_LDR_PC_G2             = 0x3f,
740    R_ARM_LDRS_PC_G0            = 0x40,
741    R_ARM_LDRS_PC_G1            = 0x41,
742    R_ARM_LDRS_PC_G2            = 0x42,
743    R_ARM_LDC_PC_G0             = 0x43,
744    R_ARM_LDC_PC_G1             = 0x44,
745    R_ARM_LDC_PC_G2             = 0x45,
746    R_ARM_ALU_SB_G0_NC          = 0x46,
747    R_ARM_ALU_SB_G0             = 0x47,
748    R_ARM_ALU_SB_G1_NC          = 0x48,
749    R_ARM_ALU_SB_G1             = 0x49,
750    R_ARM_ALU_SB_G2             = 0x4a,
751    R_ARM_LDR_SB_G0             = 0x4b,
752    R_ARM_LDR_SB_G1             = 0x4c,
753    R_ARM_LDR_SB_G2             = 0x4d,
754    R_ARM_LDRS_SB_G0            = 0x4e,
755    R_ARM_LDRS_SB_G1            = 0x4f,
756    R_ARM_LDRS_SB_G2            = 0x50,
757    R_ARM_LDC_SB_G0             = 0x51,
758    R_ARM_LDC_SB_G1             = 0x52,
759    R_ARM_LDC_SB_G2             = 0x53,
760    R_ARM_MOVW_BREL_NC          = 0x54,
761    R_ARM_MOVT_BREL             = 0x55,
762    R_ARM_MOVW_BREL             = 0x56,
763    R_ARM_THM_MOVW_BREL_NC      = 0x57,
764    R_ARM_THM_MOVT_BREL         = 0x58,
765    R_ARM_THM_MOVW_BREL         = 0x59,
766    R_ARM_TLS_GOTDESC           = 0x5a,
767    R_ARM_TLS_CALL              = 0x5b,
768    R_ARM_TLS_DESCSEQ           = 0x5c,
769    R_ARM_THM_TLS_CALL          = 0x5d,
770    R_ARM_PLT32_ABS             = 0x5e,
771    R_ARM_GOT_ABS               = 0x5f,
772    R_ARM_GOT_PREL              = 0x60,
773    R_ARM_GOT_BREL12            = 0x61,
774    R_ARM_GOTOFF12              = 0x62,
775    R_ARM_GOTRELAX              = 0x63,
776    R_ARM_GNU_VTENTRY           = 0x64,
777    R_ARM_GNU_VTINHERIT         = 0x65,
778    R_ARM_THM_JUMP11            = 0x66,
779    R_ARM_THM_JUMP8             = 0x67,
780    R_ARM_TLS_GD32              = 0x68,
781    R_ARM_TLS_LDM32             = 0x69,
782    R_ARM_TLS_LDO32             = 0x6a,
783    R_ARM_TLS_IE32              = 0x6b,
784    R_ARM_TLS_LE32              = 0x6c,
785    R_ARM_TLS_LDO12             = 0x6d,
786    R_ARM_TLS_LE12              = 0x6e,
787    R_ARM_TLS_IE12GP            = 0x6f,
788    R_ARM_PRIVATE_0             = 0x70,
789    R_ARM_PRIVATE_1             = 0x71,
790    R_ARM_PRIVATE_2             = 0x72,
791    R_ARM_PRIVATE_3             = 0x73,
792    R_ARM_PRIVATE_4             = 0x74,
793    R_ARM_PRIVATE_5             = 0x75,
794    R_ARM_PRIVATE_6             = 0x76,
795    R_ARM_PRIVATE_7             = 0x77,
796    R_ARM_PRIVATE_8             = 0x78,
797    R_ARM_PRIVATE_9             = 0x79,
798    R_ARM_PRIVATE_10            = 0x7a,
799    R_ARM_PRIVATE_11            = 0x7b,
800    R_ARM_PRIVATE_12            = 0x7c,
801    R_ARM_PRIVATE_13            = 0x7d,
802    R_ARM_PRIVATE_14            = 0x7e,
803    R_ARM_PRIVATE_15            = 0x7f,
804    R_ARM_ME_TOO                = 0x80,
805    R_ARM_THM_TLS_DESCSEQ16     = 0x81,
806    R_ARM_THM_TLS_DESCSEQ32     = 0x82
807  };
808  
809  // Mips Specific e_flags
810  enum : unsigned {
811    EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions
812    EF_MIPS_PIC       = 0x00000002, // Position independent code
813    EF_MIPS_CPIC      = 0x00000004, // Call object with Position independent code
814    EF_MIPS_ABI2      = 0x00000020,
815    EF_MIPS_32BITMODE = 0x00000100,
816    EF_MIPS_NAN2008   = 0x00000400, // Uses IEE 754-2008 NaN encoding
817    EF_MIPS_ABI_O32   = 0x00001000, // This file follows the first MIPS 32 bit ABI
818  
819    //ARCH_ASE
820    EF_MIPS_MICROMIPS = 0x02000000, // microMIPS
821    EF_MIPS_ARCH_ASE_M16 =
822                        0x04000000, // Has Mips-16 ISA extensions
823    //ARCH
824    EF_MIPS_ARCH_1    = 0x00000000, // MIPS1 instruction set
825    EF_MIPS_ARCH_2    = 0x10000000, // MIPS2 instruction set
826    EF_MIPS_ARCH_3    = 0x20000000, // MIPS3 instruction set
827    EF_MIPS_ARCH_4    = 0x30000000, // MIPS4 instruction set
828    EF_MIPS_ARCH_5    = 0x40000000, // MIPS5 instruction set
829    EF_MIPS_ARCH_32   = 0x50000000, // MIPS32 instruction set per linux not elf.h
830    EF_MIPS_ARCH_64   = 0x60000000, // MIPS64 instruction set per linux not elf.h
831    EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2
832    EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2
833    EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6
834    EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6
835    EF_MIPS_ARCH      = 0xf0000000  // Mask for applying EF_MIPS_ARCH_ variant
836  };
837  
838  // ELF Relocation types for Mips
839  enum {
840    R_MIPS_NONE              =  0,
841    R_MIPS_16                =  1,
842    R_MIPS_32                =  2,
843    R_MIPS_REL32             =  3,
844    R_MIPS_26                =  4,
845    R_MIPS_HI16              =  5,
846    R_MIPS_LO16              =  6,
847    R_MIPS_GPREL16           =  7,
848    R_MIPS_LITERAL           =  8,
849    R_MIPS_GOT16             =  9,
850    R_MIPS_PC16              = 10,
851    R_MIPS_CALL16            = 11,
852    R_MIPS_GPREL32           = 12,
853    R_MIPS_UNUSED1           = 13,
854    R_MIPS_UNUSED2           = 14,
855    R_MIPS_SHIFT5            = 16,
856    R_MIPS_SHIFT6            = 17,
857    R_MIPS_64                = 18,
858    R_MIPS_GOT_DISP          = 19,
859    R_MIPS_GOT_PAGE          = 20,
860    R_MIPS_GOT_OFST          = 21,
861    R_MIPS_GOT_HI16          = 22,
862    R_MIPS_GOT_LO16          = 23,
863    R_MIPS_SUB               = 24,
864    R_MIPS_INSERT_A          = 25,
865    R_MIPS_INSERT_B          = 26,
866    R_MIPS_DELETE            = 27,
867    R_MIPS_HIGHER            = 28,
868    R_MIPS_HIGHEST           = 29,
869    R_MIPS_CALL_HI16         = 30,
870    R_MIPS_CALL_LO16         = 31,
871    R_MIPS_SCN_DISP          = 32,
872    R_MIPS_REL16             = 33,
873    R_MIPS_ADD_IMMEDIATE     = 34,
874    R_MIPS_PJUMP             = 35,
875    R_MIPS_RELGOT            = 36,
876    R_MIPS_JALR              = 37,
877    R_MIPS_TLS_DTPMOD32      = 38,
878    R_MIPS_TLS_DTPREL32      = 39,
879    R_MIPS_TLS_DTPMOD64      = 40,
880    R_MIPS_TLS_DTPREL64      = 41,
881    R_MIPS_TLS_GD            = 42,
882    R_MIPS_TLS_LDM           = 43,
883    R_MIPS_TLS_DTPREL_HI16   = 44,
884    R_MIPS_TLS_DTPREL_LO16   = 45,
885    R_MIPS_TLS_GOTTPREL      = 46,
886    R_MIPS_TLS_TPREL32       = 47,
887    R_MIPS_TLS_TPREL64       = 48,
888    R_MIPS_TLS_TPREL_HI16    = 49,
889    R_MIPS_TLS_TPREL_LO16    = 50,
890    R_MIPS_GLOB_DAT          = 51,
891    R_MIPS_PC21_S2           = 60,
892    R_MIPS_PC26_S2           = 61,
893    R_MIPS_PC18_S3           = 62,
894    R_MIPS_PC19_S2           = 63,
895    R_MIPS_PCHI16            = 64,
896    R_MIPS_PCLO16            = 65,
897    R_MIPS16_GOT16           = 102,
898    R_MIPS16_HI16            = 104,
899    R_MIPS16_LO16            = 105,
900    R_MIPS_COPY              = 126,
901    R_MIPS_JUMP_SLOT         = 127,
902    R_MICROMIPS_26_S1        = 133,
903    R_MICROMIPS_HI16         = 134,
904    R_MICROMIPS_LO16         = 135,
905    R_MICROMIPS_GOT16        = 138,
906    R_MICROMIPS_PC16_S1      = 141,
907    R_MICROMIPS_CALL16       = 142,
908    R_MICROMIPS_GOT_DISP     = 145,
909    R_MICROMIPS_GOT_PAGE     = 146,
910    R_MICROMIPS_GOT_OFST     = 147,
911    R_MICROMIPS_TLS_GD          = 162,
912    R_MICROMIPS_TLS_LDM         = 163,
913    R_MICROMIPS_TLS_DTPREL_HI16 = 164,
914    R_MICROMIPS_TLS_DTPREL_LO16 = 165,
915    R_MICROMIPS_TLS_TPREL_HI16  = 169,
916    R_MICROMIPS_TLS_TPREL_LO16  = 170,
917    R_MIPS_NUM               = 218,
918    R_MIPS_PC32              = 248
919  };
920  
921  // Special values for the st_other field in the symbol table entry for MIPS.
922  enum {
923    STO_MIPS_OPTIONAL        = 0x04,  // Symbol whose definition is optional
924    STO_MIPS_PLT             = 0x08,  // PLT entry related dynamic table record
925    STO_MIPS_PIC             = 0x20,  // PIC func in an object mixes PIC/non-PIC
926    STO_MIPS_MICROMIPS       = 0x80,  // MIPS Specific ISA for MicroMips
927    STO_MIPS_MIPS16          = 0xf0   // MIPS Specific ISA for Mips16
928  };
929  
930  // Hexagon Specific e_flags
931  // Release 5 ABI
932  enum {
933    // Object processor version flags, bits[3:0]
934    EF_HEXAGON_MACH_V2      = 0x00000001,   // Hexagon V2
935    EF_HEXAGON_MACH_V3      = 0x00000002,   // Hexagon V3
936    EF_HEXAGON_MACH_V4      = 0x00000003,   // Hexagon V4
937    EF_HEXAGON_MACH_V5      = 0x00000004,   // Hexagon V5
938  
939    // Highest ISA version flags
940    EF_HEXAGON_ISA_MACH     = 0x00000000,   // Same as specified in bits[3:0]
941                                            // of e_flags
942    EF_HEXAGON_ISA_V2       = 0x00000010,   // Hexagon V2 ISA
943    EF_HEXAGON_ISA_V3       = 0x00000020,   // Hexagon V3 ISA
944    EF_HEXAGON_ISA_V4       = 0x00000030,   // Hexagon V4 ISA
945    EF_HEXAGON_ISA_V5       = 0x00000040    // Hexagon V5 ISA
946  };
947  
948  // Hexagon specific Section indexes for common small data
949  // Release 5 ABI
950  enum {
951    SHN_HEXAGON_SCOMMON     = 0xff00,       // Other access sizes
952    SHN_HEXAGON_SCOMMON_1   = 0xff01,       // Byte-sized access
953    SHN_HEXAGON_SCOMMON_2   = 0xff02,       // Half-word-sized access
954    SHN_HEXAGON_SCOMMON_4   = 0xff03,       // Word-sized access
955    SHN_HEXAGON_SCOMMON_8   = 0xff04        // Double-word-size access
956  };
957  
958  // ELF Relocation types for Hexagon
959  // Release 5 ABI
960  enum {
961    R_HEX_NONE              =  0,
962    R_HEX_B22_PCREL         =  1,
963    R_HEX_B15_PCREL         =  2,
964    R_HEX_B7_PCREL          =  3,
965    R_HEX_LO16              =  4,
966    R_HEX_HI16              =  5,
967    R_HEX_32                =  6,
968    R_HEX_16                =  7,
969    R_HEX_8                 =  8,
970    R_HEX_GPREL16_0         =  9,
971    R_HEX_GPREL16_1         =  10,
972    R_HEX_GPREL16_2         =  11,
973    R_HEX_GPREL16_3         =  12,
974    R_HEX_HL16              =  13,
975    R_HEX_B13_PCREL         =  14,
976    R_HEX_B9_PCREL          =  15,
977    R_HEX_B32_PCREL_X       =  16,
978    R_HEX_32_6_X            =  17,
979    R_HEX_B22_PCREL_X       =  18,
980    R_HEX_B15_PCREL_X       =  19,
981    R_HEX_B13_PCREL_X       =  20,
982    R_HEX_B9_PCREL_X        =  21,
983    R_HEX_B7_PCREL_X        =  22,
984    R_HEX_16_X              =  23,
985    R_HEX_12_X              =  24,
986    R_HEX_11_X              =  25,
987    R_HEX_10_X              =  26,
988    R_HEX_9_X               =  27,
989    R_HEX_8_X               =  28,
990    R_HEX_7_X               =  29,
991    R_HEX_6_X               =  30,
992    R_HEX_32_PCREL          =  31,
993    R_HEX_COPY              =  32,
994    R_HEX_GLOB_DAT          =  33,
995    R_HEX_JMP_SLOT          =  34,
996    R_HEX_RELATIVE          =  35,
997    R_HEX_PLT_B22_PCREL     =  36,
998    R_HEX_GOTREL_LO16       =  37,
999    R_HEX_GOTREL_HI16       =  38,
1000    R_HEX_GOTREL_32         =  39,
1001    R_HEX_GOT_LO16          =  40,
1002    R_HEX_GOT_HI16          =  41,
1003    R_HEX_GOT_32            =  42,
1004    R_HEX_GOT_16            =  43,
1005    R_HEX_DTPMOD_32         =  44,
1006    R_HEX_DTPREL_LO16       =  45,
1007    R_HEX_DTPREL_HI16       =  46,
1008    R_HEX_DTPREL_32         =  47,
1009    R_HEX_DTPREL_16         =  48,
1010    R_HEX_GD_PLT_B22_PCREL  =  49,
1011    R_HEX_GD_GOT_LO16       =  50,
1012    R_HEX_GD_GOT_HI16       =  51,
1013    R_HEX_GD_GOT_32         =  52,
1014    R_HEX_GD_GOT_16         =  53,
1015    R_HEX_IE_LO16           =  54,
1016    R_HEX_IE_HI16           =  55,
1017    R_HEX_IE_32             =  56,
1018    R_HEX_IE_GOT_LO16       =  57,
1019    R_HEX_IE_GOT_HI16       =  58,
1020    R_HEX_IE_GOT_32         =  59,
1021    R_HEX_IE_GOT_16         =  60,
1022    R_HEX_TPREL_LO16        =  61,
1023    R_HEX_TPREL_HI16        =  62,
1024    R_HEX_TPREL_32          =  63,
1025    R_HEX_TPREL_16          =  64,
1026    R_HEX_6_PCREL_X         =  65,
1027    R_HEX_GOTREL_32_6_X     =  66,
1028    R_HEX_GOTREL_16_X       =  67,
1029    R_HEX_GOTREL_11_X       =  68,
1030    R_HEX_GOT_32_6_X        =  69,
1031    R_HEX_GOT_16_X          =  70,
1032    R_HEX_GOT_11_X          =  71,
1033    R_HEX_DTPREL_32_6_X     =  72,
1034    R_HEX_DTPREL_16_X       =  73,
1035    R_HEX_DTPREL_11_X       =  74,
1036    R_HEX_GD_GOT_32_6_X     =  75,
1037    R_HEX_GD_GOT_16_X       =  76,
1038    R_HEX_GD_GOT_11_X       =  77,
1039    R_HEX_IE_32_6_X         =  78,
1040    R_HEX_IE_16_X           =  79,
1041    R_HEX_IE_GOT_32_6_X     =  80,
1042    R_HEX_IE_GOT_16_X       =  81,
1043    R_HEX_IE_GOT_11_X       =  82,
1044    R_HEX_TPREL_32_6_X      =  83,
1045    R_HEX_TPREL_16_X        =  84,
1046    R_HEX_TPREL_11_X        =  85
1047  };
1048  
1049  // ELF Relocation types for S390/zSeries
1050  enum {
1051    R_390_NONE        =  0,
1052    R_390_8           =  1,
1053    R_390_12          =  2,
1054    R_390_16          =  3,
1055    R_390_32          =  4,
1056    R_390_PC32        =  5,
1057    R_390_GOT12       =  6,
1058    R_390_GOT32       =  7,
1059    R_390_PLT32       =  8,
1060    R_390_COPY        =  9,
1061    R_390_GLOB_DAT    = 10,
1062    R_390_JMP_SLOT    = 11,
1063    R_390_RELATIVE    = 12,
1064    R_390_GOTOFF      = 13,
1065    R_390_GOTPC       = 14,
1066    R_390_GOT16       = 15,
1067    R_390_PC16        = 16,
1068    R_390_PC16DBL     = 17,
1069    R_390_PLT16DBL    = 18,
1070    R_390_PC32DBL     = 19,
1071    R_390_PLT32DBL    = 20,
1072    R_390_GOTPCDBL    = 21,
1073    R_390_64          = 22,
1074    R_390_PC64        = 23,
1075    R_390_GOT64       = 24,
1076    R_390_PLT64       = 25,
1077    R_390_GOTENT      = 26,
1078    R_390_GOTOFF16    = 27,
1079    R_390_GOTOFF64    = 28,
1080    R_390_GOTPLT12    = 29,
1081    R_390_GOTPLT16    = 30,
1082    R_390_GOTPLT32    = 31,
1083    R_390_GOTPLT64    = 32,
1084    R_390_GOTPLTENT   = 33,
1085    R_390_PLTOFF16    = 34,
1086    R_390_PLTOFF32    = 35,
1087    R_390_PLTOFF64    = 36,
1088    R_390_TLS_LOAD    = 37,
1089    R_390_TLS_GDCALL  = 38,
1090    R_390_TLS_LDCALL  = 39,
1091    R_390_TLS_GD32    = 40,
1092    R_390_TLS_GD64    = 41,
1093    R_390_TLS_GOTIE12 = 42,
1094    R_390_TLS_GOTIE32 = 43,
1095    R_390_TLS_GOTIE64 = 44,
1096    R_390_TLS_LDM32   = 45,
1097    R_390_TLS_LDM64   = 46,
1098    R_390_TLS_IE32    = 47,
1099    R_390_TLS_IE64    = 48,
1100    R_390_TLS_IEENT   = 49,
1101    R_390_TLS_LE32    = 50,
1102    R_390_TLS_LE64    = 51,
1103    R_390_TLS_LDO32   = 52,
1104    R_390_TLS_LDO64   = 53,
1105    R_390_TLS_DTPMOD  = 54,
1106    R_390_TLS_DTPOFF  = 55,
1107    R_390_TLS_TPOFF   = 56,
1108    R_390_20          = 57,
1109    R_390_GOT20       = 58,
1110    R_390_GOTPLT20    = 59,
1111    R_390_TLS_GOTIE20 = 60,
1112    R_390_IRELATIVE   = 61
1113  };
1114  
1115  // ELF Relocation type for Sparc.
1116  enum {
1117    R_SPARC_NONE        = 0,
1118    R_SPARC_8           = 1,
1119    R_SPARC_16          = 2,
1120    R_SPARC_32          = 3,
1121    R_SPARC_DISP8       = 4,
1122    R_SPARC_DISP16      = 5,
1123    R_SPARC_DISP32      = 6,
1124    R_SPARC_WDISP30     = 7,
1125    R_SPARC_WDISP22     = 8,
1126    R_SPARC_HI22        = 9,
1127    R_SPARC_22          = 10,
1128    R_SPARC_13          = 11,
1129    R_SPARC_LO10        = 12,
1130    R_SPARC_GOT10       = 13,
1131    R_SPARC_GOT13       = 14,
1132    R_SPARC_GOT22       = 15,
1133    R_SPARC_PC10        = 16,
1134    R_SPARC_PC22        = 17,
1135    R_SPARC_WPLT30      = 18,
1136    R_SPARC_COPY        = 19,
1137    R_SPARC_GLOB_DAT    = 20,
1138    R_SPARC_JMP_SLOT    = 21,
1139    R_SPARC_RELATIVE    = 22,
1140    R_SPARC_UA32        = 23,
1141    R_SPARC_PLT32       = 24,
1142    R_SPARC_HIPLT22     = 25,
1143    R_SPARC_LOPLT10     = 26,
1144    R_SPARC_PCPLT32     = 27,
1145    R_SPARC_PCPLT22     = 28,
1146    R_SPARC_PCPLT10     = 29,
1147    R_SPARC_10          = 30,
1148    R_SPARC_11          = 31,
1149    R_SPARC_64          = 32,
1150    R_SPARC_OLO10       = 33,
1151    R_SPARC_HH22        = 34,
1152    R_SPARC_HM10        = 35,
1153    R_SPARC_LM22        = 36,
1154    R_SPARC_PC_HH22     = 37,
1155    R_SPARC_PC_HM10     = 38,
1156    R_SPARC_PC_LM22     = 39,
1157    R_SPARC_WDISP16     = 40,
1158    R_SPARC_WDISP19     = 41,
1159    R_SPARC_7           = 43,
1160    R_SPARC_5           = 44,
1161    R_SPARC_6           = 45,
1162    R_SPARC_DISP64      = 46,
1163    R_SPARC_PLT64       = 47,
1164    R_SPARC_HIX22       = 48,
1165    R_SPARC_LOX10       = 49,
1166    R_SPARC_H44         = 50,
1167    R_SPARC_M44         = 51,
1168    R_SPARC_L44         = 52,
1169    R_SPARC_REGISTER    = 53,
1170    R_SPARC_UA64        = 54,
1171    R_SPARC_UA16        = 55,
1172    R_SPARC_TLS_GD_HI22   = 56,
1173    R_SPARC_TLS_GD_LO10   = 57,
1174    R_SPARC_TLS_GD_ADD    = 58,
1175    R_SPARC_TLS_GD_CALL   = 59,
1176    R_SPARC_TLS_LDM_HI22  = 60,
1177    R_SPARC_TLS_LDM_LO10  = 61,
1178    R_SPARC_TLS_LDM_ADD   = 62,
1179    R_SPARC_TLS_LDM_CALL  = 63,
1180    R_SPARC_TLS_LDO_HIX22 = 64,
1181    R_SPARC_TLS_LDO_LOX10 = 65,
1182    R_SPARC_TLS_LDO_ADD   = 66,
1183    R_SPARC_TLS_IE_HI22   = 67,
1184    R_SPARC_TLS_IE_LO10   = 68,
1185    R_SPARC_TLS_IE_LD     = 69,
1186    R_SPARC_TLS_IE_LDX    = 70,
1187    R_SPARC_TLS_IE_ADD    = 71,
1188    R_SPARC_TLS_LE_HIX22  = 72,
1189    R_SPARC_TLS_LE_LOX10  = 73,
1190    R_SPARC_TLS_DTPMOD32  = 74,
1191    R_SPARC_TLS_DTPMOD64  = 75,
1192    R_SPARC_TLS_DTPOFF32  = 76,
1193    R_SPARC_TLS_DTPOFF64  = 77,
1194    R_SPARC_TLS_TPOFF32   = 78,
1195    R_SPARC_TLS_TPOFF64   = 79,
1196    R_SPARC_GOTDATA_HIX22 = 80,
1197    R_SPARC_GOTDATA_LOX22 = 81,
1198    R_SPARC_GOTDATA_OP_HIX22 = 82,
1199    R_SPARC_GOTDATA_OP_LOX22 = 83,
1200    R_SPARC_GOTDATA_OP    = 84
1201  };
1202  
1203  // Section header.
1204  struct Elf32_Shdr {
1205    Elf32_Word sh_name;      // Section name (index into string table)
1206    Elf32_Word sh_type;      // Section type (SHT_*)
1207    Elf32_Word sh_flags;     // Section flags (SHF_*)
1208    Elf32_Addr sh_addr;      // Address where section is to be loaded
1209    Elf32_Off  sh_offset;    // File offset of section data, in bytes
1210    Elf32_Word sh_size;      // Size of section, in bytes
1211    Elf32_Word sh_link;      // Section type-specific header table index link
1212    Elf32_Word sh_info;      // Section type-specific extra information
1213    Elf32_Word sh_addralign; // Section address alignment
1214    Elf32_Word sh_entsize;   // Size of records contained within the section
1215  };
1216  
1217  // Section header for ELF64 - same fields as ELF32, different types.
1218  struct Elf64_Shdr {
1219    Elf64_Word  sh_name;
1220    Elf64_Word  sh_type;
1221    Elf64_Xword sh_flags;
1222    Elf64_Addr  sh_addr;
1223    Elf64_Off   sh_offset;
1224    Elf64_Xword sh_size;
1225    Elf64_Word  sh_link;
1226    Elf64_Word  sh_info;
1227    Elf64_Xword sh_addralign;
1228    Elf64_Xword sh_entsize;
1229  };
1230  
1231  // Special section indices.
1232  enum {
1233    SHN_UNDEF     = 0,      // Undefined, missing, irrelevant, or meaningless
1234    SHN_LORESERVE = 0xff00, // Lowest reserved index
1235    SHN_LOPROC    = 0xff00, // Lowest processor-specific index
1236    SHN_HIPROC    = 0xff1f, // Highest processor-specific index
1237    SHN_LOOS      = 0xff20, // Lowest operating system-specific index
1238    SHN_HIOS      = 0xff3f, // Highest operating system-specific index
1239    SHN_ABS       = 0xfff1, // Symbol has absolute value; does not need relocation
1240    SHN_COMMON    = 0xfff2, // FORTRAN COMMON or C external global variables
1241    SHN_XINDEX    = 0xffff, // Mark that the index is >= SHN_LORESERVE
1242    SHN_HIRESERVE = 0xffff  // Highest reserved index
1243  };
1244  
1245  // Section types.
1246  enum : unsigned {
1247    SHT_NULL          = 0,  // No associated section (inactive entry).
1248    SHT_PROGBITS      = 1,  // Program-defined contents.
1249    SHT_SYMTAB        = 2,  // Symbol table.
1250    SHT_STRTAB        = 3,  // String table.
1251    SHT_RELA          = 4,  // Relocation entries; explicit addends.
1252    SHT_HASH          = 5,  // Symbol hash table.
1253    SHT_DYNAMIC       = 6,  // Information for dynamic linking.
1254    SHT_NOTE          = 7,  // Information about the file.
1255    SHT_NOBITS        = 8,  // Data occupies no space in the file.
1256    SHT_REL           = 9,  // Relocation entries; no explicit addends.
1257    SHT_SHLIB         = 10, // Reserved.
1258    SHT_DYNSYM        = 11, // Symbol table.
1259    SHT_INIT_ARRAY    = 14, // Pointers to initialization functions.
1260    SHT_FINI_ARRAY    = 15, // Pointers to termination functions.
1261    SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions.
1262    SHT_GROUP         = 17, // Section group.
1263    SHT_SYMTAB_SHNDX  = 18, // Indices for SHN_XINDEX entries.
1264    SHT_LOOS          = 0x60000000, // Lowest operating system-specific type.
1265    SHT_GNU_ATTRIBUTES= 0x6ffffff5, // Object attributes.
1266    SHT_GNU_HASH      = 0x6ffffff6, // GNU-style hash table.
1267    SHT_GNU_verdef    = 0x6ffffffd, // GNU version definitions.
1268    SHT_GNU_verneed   = 0x6ffffffe, // GNU version references.
1269    SHT_GNU_versym    = 0x6fffffff, // GNU symbol versions table.
1270    SHT_HIOS          = 0x6fffffff, // Highest operating system-specific type.
1271    SHT_LOPROC        = 0x70000000, // Lowest processor arch-specific type.
1272    // Fixme: All this is duplicated in MCSectionELF. Why??
1273    // Exception Index table
1274    SHT_ARM_EXIDX           = 0x70000001U,
1275    // BPABI DLL dynamic linking pre-emption map
1276    SHT_ARM_PREEMPTMAP      = 0x70000002U,
1277    //  Object file compatibility attributes
1278    SHT_ARM_ATTRIBUTES      = 0x70000003U,
1279    SHT_ARM_DEBUGOVERLAY    = 0x70000004U,
1280    SHT_ARM_OVERLAYSECTION  = 0x70000005U,
1281    SHT_HEX_ORDERED         = 0x70000000, // Link editor is to sort the entries in
1282                                          // this section based on their sizes
1283    SHT_X86_64_UNWIND       = 0x70000001, // Unwind information
1284  
1285    SHT_MIPS_REGINFO        = 0x70000006, // Register usage information
1286    SHT_MIPS_OPTIONS        = 0x7000000d, // General options
1287  
1288    SHT_HIPROC        = 0x7fffffff, // Highest processor arch-specific type.
1289    SHT_LOUSER        = 0x80000000, // Lowest type reserved for applications.
1290    SHT_HIUSER        = 0xffffffff  // Highest type reserved for applications.
1291  };
1292  
1293  // Section flags.
1294  enum : unsigned {
1295    // Section data should be writable during execution.
1296    SHF_WRITE = 0x1,
1297  
1298    // Section occupies memory during program execution.
1299    SHF_ALLOC = 0x2,
1300  
1301    // Section contains executable machine instructions.
1302    SHF_EXECINSTR = 0x4,
1303  
1304    // The data in this section may be merged.
1305    SHF_MERGE = 0x10,
1306  
1307    // The data in this section is null-terminated strings.
1308    SHF_STRINGS = 0x20,
1309  
1310    // A field in this section holds a section header table index.
1311    SHF_INFO_LINK = 0x40U,
1312  
1313    // Adds special ordering requirements for link editors.
1314    SHF_LINK_ORDER = 0x80U,
1315  
1316    // This section requires special OS-specific processing to avoid incorrect
1317    // behavior.
1318    SHF_OS_NONCONFORMING = 0x100U,
1319  
1320    // This section is a member of a section group.
1321    SHF_GROUP = 0x200U,
1322  
1323    // This section holds Thread-Local Storage.
1324    SHF_TLS = 0x400U,
1325  
1326    // This section is excluded from the final executable or shared library.
1327    SHF_EXCLUDE = 0x80000000U,
1328  
1329    // Start of target-specific flags.
1330  
1331    /// XCORE_SHF_CP_SECTION - All sections with the "c" flag are grouped
1332    /// together by the linker to form the constant pool and the cp register is
1333    /// set to the start of the constant pool by the boot code.
1334    XCORE_SHF_CP_SECTION = 0x800U,
1335  
1336    /// XCORE_SHF_DP_SECTION - All sections with the "d" flag are grouped
1337    /// together by the linker to form the data section and the dp register is
1338    /// set to the start of the section by the boot code.
1339    XCORE_SHF_DP_SECTION = 0x1000U,
1340  
1341    SHF_MASKOS   = 0x0ff00000,
1342  
1343    // Bits indicating processor-specific flags.
1344    SHF_MASKPROC = 0xf0000000,
1345  
1346    // If an object file section does not have this flag set, then it may not hold
1347    // more than 2GB and can be freely referred to in objects using smaller code
1348    // models. Otherwise, only objects using larger code models can refer to them.
1349    // For example, a medium code model object can refer to data in a section that
1350    // sets this flag besides being able to refer to data in a section that does
1351    // not set it; likewise, a small code model object can refer only to code in a
1352    // section that does not set this flag.
1353    SHF_X86_64_LARGE = 0x10000000,
1354  
1355    // All sections with the GPREL flag are grouped into a global data area
1356    // for faster accesses
1357    SHF_HEX_GPREL = 0x10000000,
1358  
1359    // Section contains text/data which may be replicated in other sections.
1360    // Linker must retain only one copy.
1361    SHF_MIPS_NODUPES = 0x01000000,
1362  
1363    // Linker must generate implicit hidden weak names.
1364    SHF_MIPS_NAMES   = 0x02000000,
1365  
1366    // Section data local to process.
1367    SHF_MIPS_LOCAL   = 0x04000000,
1368  
1369    // Do not strip this section.
1370    SHF_MIPS_NOSTRIP = 0x08000000,
1371  
1372    // Section must be part of global data area.
1373    SHF_MIPS_GPREL   = 0x10000000,
1374  
1375    // This section should be merged.
1376    SHF_MIPS_MERGE   = 0x20000000,
1377  
1378    // Address size to be inferred from section entry size.
1379    SHF_MIPS_ADDR    = 0x40000000,
1380  
1381    // Section data is string data by default.
1382    SHF_MIPS_STRING  = 0x80000000
1383  };
1384  
1385  // Section Group Flags
1386  enum : unsigned {
1387    GRP_COMDAT = 0x1,
1388    GRP_MASKOS = 0x0ff00000,
1389    GRP_MASKPROC = 0xf0000000
1390  };
1391  
1392  // Symbol table entries for ELF32.
1393  struct Elf32_Sym {
1394    Elf32_Word    st_name;  // Symbol name (index into string table)
1395    Elf32_Addr    st_value; // Value or address associated with the symbol
1396    Elf32_Word    st_size;  // Size of the symbol
1397    unsigned char st_info;  // Symbol's type and binding attributes
1398    unsigned char st_other; // Must be zero; reserved
1399    Elf32_Half    st_shndx; // Which section (header table index) it's defined in
1400  
1401    // These accessors and mutators correspond to the ELF32_ST_BIND,
1402    // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
getBindingElf32_Sym1403    unsigned char getBinding() const { return st_info >> 4; }
getTypeElf32_Sym1404    unsigned char getType() const { return st_info & 0x0f; }
setBindingElf32_Sym1405    void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf32_Sym1406    void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf32_Sym1407    void setBindingAndType(unsigned char b, unsigned char t) {
1408      st_info = (b << 4) + (t & 0x0f);
1409    }
1410  };
1411  
1412  // BEGIN android-added for <elf.h> compat
ELF32_ST_TYPE(unsigned char st_info)1413  static inline unsigned char ELF32_ST_TYPE(unsigned char st_info) { return st_info & 0x0f; }
1414  // END android-added for <elf.h> compat
1415  
1416  // Symbol table entries for ELF64.
1417  struct Elf64_Sym {
1418    Elf64_Word      st_name;  // Symbol name (index into string table)
1419    unsigned char   st_info;  // Symbol's type and binding attributes
1420    unsigned char   st_other; // Must be zero; reserved
1421    Elf64_Half      st_shndx; // Which section (header tbl index) it's defined in
1422    Elf64_Addr      st_value; // Value or address associated with the symbol
1423    Elf64_Xword     st_size;  // Size of the symbol
1424  
1425    // These accessors and mutators are identical to those defined for ELF32
1426    // symbol table entries.
getBindingElf64_Sym1427    unsigned char getBinding() const { return st_info >> 4; }
getTypeElf64_Sym1428    unsigned char getType() const { return st_info & 0x0f; }
setBindingElf64_Sym1429    void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf64_Sym1430    void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf64_Sym1431    void setBindingAndType(unsigned char b, unsigned char t) {
1432      st_info = (b << 4) + (t & 0x0f);
1433    }
1434  };
1435  
1436  // The size (in bytes) of symbol table entries.
1437  enum {
1438    SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
1439    SYMENTRY_SIZE64 = 24  // 64-bit symbol entry size.
1440  };
1441  
1442  // Symbol bindings.
1443  enum {
1444    STB_LOCAL = 0,   // Local symbol, not visible outside obj file containing def
1445    STB_GLOBAL = 1,  // Global symbol, visible to all object files being combined
1446    STB_WEAK = 2,    // Weak symbol, like global but lower-precedence
1447    STB_LOOS   = 10, // Lowest operating system-specific binding type
1448    STB_HIOS   = 12, // Highest operating system-specific binding type
1449    STB_LOPROC = 13, // Lowest processor-specific binding type
1450    STB_HIPROC = 15  // Highest processor-specific binding type
1451  };
1452  
1453  // Symbol types.
1454  enum {
1455    STT_NOTYPE  = 0,   // Symbol's type is not specified
1456    STT_OBJECT  = 1,   // Symbol is a data object (variable, array, etc.)
1457    STT_FUNC    = 2,   // Symbol is executable code (function, etc.)
1458    STT_SECTION = 3,   // Symbol refers to a section
1459    STT_FILE    = 4,   // Local, absolute symbol that refers to a file
1460    STT_COMMON  = 5,   // An uninitialized common block
1461    STT_TLS     = 6,   // Thread local data object
1462    STT_LOOS    = 7,   // Lowest operating system-specific symbol type
1463    STT_HIOS    = 8,   // Highest operating system-specific symbol type
1464    STT_GNU_IFUNC = 10, // GNU indirect function
1465    STT_LOPROC  = 13,  // Lowest processor-specific symbol type
1466    STT_HIPROC  = 15   // Highest processor-specific symbol type
1467  };
1468  
1469  enum {
1470    STV_DEFAULT   = 0,  // Visibility is specified by binding type
1471    STV_INTERNAL  = 1,  // Defined by processor supplements
1472    STV_HIDDEN    = 2,  // Not visible to other components
1473    STV_PROTECTED = 3   // Visible in other components but not preemptable
1474  };
1475  
1476  // Symbol number.
1477  enum {
1478    STN_UNDEF = 0
1479  };
1480  
1481  // Relocation entry, without explicit addend.
1482  struct Elf32_Rel {
1483    Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
1484    Elf32_Word r_info;   // Symbol table index and type of relocation to apply
1485  
1486    // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1487    // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rel1488    Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rel1489    unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
setSymbolElf32_Rel1490    void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rel1491    void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rel1492    void setSymbolAndType(Elf32_Word s, unsigned char t) {
1493      r_info = (s << 8) + t;
1494    }
1495  };
1496  
1497  // Relocation entry with explicit addend.
1498  struct Elf32_Rela {
1499    Elf32_Addr  r_offset; // Location (file byte offset, or program virtual addr)
1500    Elf32_Word  r_info;   // Symbol table index and type of relocation to apply
1501    Elf32_Sword r_addend; // Compute value for relocatable field by adding this
1502  
1503    // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1504    // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rela1505    Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rela1506    unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
setSymbolElf32_Rela1507    void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rela1508    void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rela1509    void setSymbolAndType(Elf32_Word s, unsigned char t) {
1510      r_info = (s << 8) + t;
1511    }
1512  };
1513  
1514  // Relocation entry, without explicit addend.
1515  struct Elf64_Rel {
1516    Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
1517    Elf64_Xword r_info;   // Symbol table index and type of relocation to apply.
1518  
1519    // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1520    // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rel1521    Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rel1522    Elf64_Word getType() const {
1523      return (Elf64_Word) (r_info & 0xffffffffL);
1524    }
setSymbolElf64_Rel1525    void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rel1526    void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rel1527    void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1528      r_info = ((Elf64_Xword)s << 32) + (t&0xffffffffL);
1529    }
1530  };
1531  
1532  // Relocation entry with explicit addend.
1533  struct Elf64_Rela {
1534    Elf64_Addr  r_offset; // Location (file byte offset, or program virtual addr).
1535    Elf64_Xword  r_info;   // Symbol table index and type of relocation to apply.
1536    Elf64_Sxword r_addend; // Compute value for relocatable field by adding this.
1537  
1538    // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1539    // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rela1540    Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rela1541    Elf64_Word getType() const {
1542      return (Elf64_Word) (r_info & 0xffffffffL);
1543    }
setSymbolElf64_Rela1544    void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rela1545    void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rela1546    void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1547      r_info = ((Elf64_Xword)s << 32) + (t&0xffffffffL);
1548    }
1549  };
1550  
1551  // Program header for ELF32.
1552  struct Elf32_Phdr {
1553    Elf32_Word p_type;   // Type of segment
1554    Elf32_Off  p_offset; // File offset where segment is located, in bytes
1555    Elf32_Addr p_vaddr;  // Virtual address of beginning of segment
1556    Elf32_Addr p_paddr;  // Physical address of beginning of segment (OS-specific)
1557    Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
1558    Elf32_Word p_memsz;  // Num. of bytes in mem image of segment (may be zero)
1559    Elf32_Word p_flags;  // Segment flags
1560    Elf32_Word p_align;  // Segment alignment constraint
1561  };
1562  
1563  // Program header for ELF64.
1564  struct Elf64_Phdr {
1565    Elf64_Word   p_type;   // Type of segment
1566    Elf64_Word   p_flags;  // Segment flags
1567    Elf64_Off    p_offset; // File offset where segment is located, in bytes
1568    Elf64_Addr   p_vaddr;  // Virtual address of beginning of segment
1569    Elf64_Addr   p_paddr;  // Physical addr of beginning of segment (OS-specific)
1570    Elf64_Xword  p_filesz; // Num. of bytes in file image of segment (may be zero)
1571    Elf64_Xword  p_memsz;  // Num. of bytes in mem image of segment (may be zero)
1572    Elf64_Xword  p_align;  // Segment alignment constraint
1573  };
1574  
1575  // Segment types.
1576  enum {
1577    PT_NULL    = 0, // Unused segment.
1578    PT_LOAD    = 1, // Loadable segment.
1579    PT_DYNAMIC = 2, // Dynamic linking information.
1580    PT_INTERP  = 3, // Interpreter pathname.
1581    PT_NOTE    = 4, // Auxiliary information.
1582    PT_SHLIB   = 5, // Reserved.
1583    PT_PHDR    = 6, // The program header table itself.
1584    PT_TLS     = 7, // The thread-local storage template.
1585    PT_LOOS    = 0x60000000, // Lowest operating system-specific pt entry type.
1586    PT_HIOS    = 0x6fffffff, // Highest operating system-specific pt entry type.
1587    PT_LOPROC  = 0x70000000, // Lowest processor-specific program hdr entry type.
1588    PT_HIPROC  = 0x7fffffff, // Highest processor-specific program hdr entry type.
1589  
1590    // x86-64 program header types.
1591    // These all contain stack unwind tables.
1592    PT_GNU_EH_FRAME  = 0x6474e550,
1593    PT_SUNW_EH_FRAME = 0x6474e550,
1594    PT_SUNW_UNWIND   = 0x6464e550,
1595  
1596    PT_GNU_STACK  = 0x6474e551, // Indicates stack executability.
1597    PT_GNU_RELRO  = 0x6474e552, // Read-only after relocation.
1598  
1599    // ARM program header types.
1600    PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info
1601    // These all contain stack unwind tables.
1602    PT_ARM_EXIDX   = 0x70000001,
1603    PT_ARM_UNWIND  = 0x70000001,
1604  
1605    // MIPS program header types.
1606    PT_MIPS_REGINFO  = 0x70000000,  // Register usage information.
1607    PT_MIPS_RTPROC   = 0x70000001,  // Runtime procedure table.
1608    PT_MIPS_OPTIONS  = 0x70000002   // Options segment.
1609  };
1610  
1611  // Segment flag bits.
1612  enum : unsigned {
1613    PF_X        = 1,         // Execute
1614    PF_W        = 2,         // Write
1615    PF_R        = 4,         // Read
1616    PF_MASKOS   = 0x0ff00000,// Bits for operating system-specific semantics.
1617    PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics.
1618  };
1619  
1620  // Dynamic table entry for ELF32.
1621  struct Elf32_Dyn
1622  {
1623    Elf32_Sword d_tag;            // Type of dynamic table entry.
1624    union
1625    {
1626        Elf32_Word d_val;         // Integer value of entry.
1627        Elf32_Addr d_ptr;         // Pointer value of entry.
1628    } d_un;
1629  };
1630  
1631  // Dynamic table entry for ELF64.
1632  struct Elf64_Dyn
1633  {
1634    Elf64_Sxword d_tag;           // Type of dynamic table entry.
1635    union
1636    {
1637        Elf64_Xword d_val;        // Integer value of entry.
1638        Elf64_Addr  d_ptr;        // Pointer value of entry.
1639    } d_un;
1640  };
1641  
1642  // Dynamic table entry tags.
1643  enum {
1644    DT_NULL         = 0,        // Marks end of dynamic array.
1645    DT_NEEDED       = 1,        // String table offset of needed library.
1646    DT_PLTRELSZ     = 2,        // Size of relocation entries in PLT.
1647    DT_PLTGOT       = 3,        // Address associated with linkage table.
1648    DT_HASH         = 4,        // Address of symbolic hash table.
1649    DT_STRTAB       = 5,        // Address of dynamic string table.
1650    DT_SYMTAB       = 6,        // Address of dynamic symbol table.
1651    DT_RELA         = 7,        // Address of relocation table (Rela entries).
1652    DT_RELASZ       = 8,        // Size of Rela relocation table.
1653    DT_RELAENT      = 9,        // Size of a Rela relocation entry.
1654    DT_STRSZ        = 10,       // Total size of the string table.
1655    DT_SYMENT       = 11,       // Size of a symbol table entry.
1656    DT_INIT         = 12,       // Address of initialization function.
1657    DT_FINI         = 13,       // Address of termination function.
1658    DT_SONAME       = 14,       // String table offset of a shared objects name.
1659    DT_RPATH        = 15,       // String table offset of library search path.
1660    DT_SYMBOLIC     = 16,       // Changes symbol resolution algorithm.
1661    DT_REL          = 17,       // Address of relocation table (Rel entries).
1662    DT_RELSZ        = 18,       // Size of Rel relocation table.
1663    DT_RELENT       = 19,       // Size of a Rel relocation entry.
1664    DT_PLTREL       = 20,       // Type of relocation entry used for linking.
1665    DT_DEBUG        = 21,       // Reserved for debugger.
1666    DT_TEXTREL      = 22,       // Relocations exist for non-writable segments.
1667    DT_JMPREL       = 23,       // Address of relocations associated with PLT.
1668    DT_BIND_NOW     = 24,       // Process all relocations before execution.
1669    DT_INIT_ARRAY   = 25,       // Pointer to array of initialization functions.
1670    DT_FINI_ARRAY   = 26,       // Pointer to array of termination functions.
1671    DT_INIT_ARRAYSZ = 27,       // Size of DT_INIT_ARRAY.
1672    DT_FINI_ARRAYSZ = 28,       // Size of DT_FINI_ARRAY.
1673    DT_RUNPATH      = 29,       // String table offset of lib search path.
1674    DT_FLAGS        = 30,       // Flags.
1675    DT_ENCODING     = 32,       // Values from here to DT_LOOS follow the rules
1676                                // for the interpretation of the d_un union.
1677  
1678    DT_PREINIT_ARRAY = 32,      // Pointer to array of preinit functions.
1679    DT_PREINIT_ARRAYSZ = 33,    // Size of the DT_PREINIT_ARRAY array.
1680  
1681    DT_LOOS         = 0x60000000, // Start of environment specific tags.
1682    DT_HIOS         = 0x6FFFFFFF, // End of environment specific tags.
1683    DT_LOPROC       = 0x70000000, // Start of processor specific tags.
1684    DT_HIPROC       = 0x7FFFFFFF, // End of processor specific tags.
1685  
1686    DT_GNU_HASH     = 0x6FFFFEF5, // Reference to the GNU hash table.
1687    DT_RELACOUNT    = 0x6FFFFFF9, // ELF32_Rela count.
1688    DT_RELCOUNT     = 0x6FFFFFFA, // ELF32_Rel count.
1689  
1690    DT_FLAGS_1      = 0X6FFFFFFB, // Flags_1.
1691    DT_VERSYM       = 0x6FFFFFF0, // The address of .gnu.version section.
1692    DT_VERDEF       = 0X6FFFFFFC, // The address of the version definition table.
1693    DT_VERDEFNUM    = 0X6FFFFFFD, // The number of entries in DT_VERDEF.
1694    DT_VERNEED      = 0X6FFFFFFE, // The address of the version Dependency table.
1695    DT_VERNEEDNUM   = 0X6FFFFFFF, // The number of entries in DT_VERNEED.
1696  
1697    // Mips specific dynamic table entry tags.
1698    DT_MIPS_RLD_VERSION   = 0x70000001, // 32 bit version number for runtime
1699                                        // linker interface.
1700    DT_MIPS_TIME_STAMP    = 0x70000002, // Time stamp.
1701    DT_MIPS_ICHECKSUM     = 0x70000003, // Checksum of external strings
1702                                        // and common sizes.
1703    DT_MIPS_IVERSION      = 0x70000004, // Index of version string
1704                                        // in string table.
1705    DT_MIPS_FLAGS         = 0x70000005, // 32 bits of flags.
1706    DT_MIPS_BASE_ADDRESS  = 0x70000006, // Base address of the segment.
1707    DT_MIPS_MSYM          = 0x70000007, // Address of .msym section.
1708    DT_MIPS_CONFLICT      = 0x70000008, // Address of .conflict section.
1709    DT_MIPS_LIBLIST       = 0x70000009, // Address of .liblist section.
1710    DT_MIPS_LOCAL_GOTNO   = 0x7000000a, // Number of local global offset
1711                                        // table entries.
1712    DT_MIPS_CONFLICTNO    = 0x7000000b, // Number of entries
1713                                        // in the .conflict section.
1714    DT_MIPS_LIBLISTNO     = 0x70000010, // Number of entries
1715                                        // in the .liblist section.
1716    DT_MIPS_SYMTABNO      = 0x70000011, // Number of entries
1717                                        // in the .dynsym section.
1718    DT_MIPS_UNREFEXTNO    = 0x70000012, // Index of first external dynamic symbol
1719                                        // not referenced locally.
1720    DT_MIPS_GOTSYM        = 0x70000013, // Index of first dynamic symbol
1721                                        // in global offset table.
1722    DT_MIPS_HIPAGENO      = 0x70000014, // Number of page table entries
1723                                        // in global offset table.
1724    DT_MIPS_RLD_MAP       = 0x70000016, // Address of run time loader map,
1725                                        // used for debugging.
1726    DT_MIPS_DELTA_CLASS       = 0x70000017, // Delta C++ class definition.
1727    DT_MIPS_DELTA_CLASS_NO    = 0x70000018, // Number of entries
1728                                            // in DT_MIPS_DELTA_CLASS.
1729    DT_MIPS_DELTA_INSTANCE    = 0x70000019, // Delta C++ class instances.
1730    DT_MIPS_DELTA_INSTANCE_NO = 0x7000001A, // Number of entries
1731                                            // in DT_MIPS_DELTA_INSTANCE.
1732    DT_MIPS_DELTA_RELOC       = 0x7000001B, // Delta relocations.
1733    DT_MIPS_DELTA_RELOC_NO    = 0x7000001C, // Number of entries
1734                                            // in DT_MIPS_DELTA_RELOC.
1735    DT_MIPS_DELTA_SYM         = 0x7000001D, // Delta symbols that Delta
1736                                            // relocations refer to.
1737    DT_MIPS_DELTA_SYM_NO      = 0x7000001E, // Number of entries
1738                                            // in DT_MIPS_DELTA_SYM.
1739    DT_MIPS_DELTA_CLASSSYM    = 0x70000020, // Delta symbols that hold
1740                                            // class declarations.
1741    DT_MIPS_DELTA_CLASSSYM_NO = 0x70000021, // Number of entries
1742                                            // in DT_MIPS_DELTA_CLASSSYM.
1743    DT_MIPS_CXX_FLAGS         = 0x70000022, // Flags indicating information
1744                                            // about C++ flavor.
1745    DT_MIPS_PIXIE_INIT        = 0x70000023, // Pixie information.
1746    DT_MIPS_SYMBOL_LIB        = 0x70000024, // Address of .MIPS.symlib
1747    DT_MIPS_LOCALPAGE_GOTIDX  = 0x70000025, // The GOT index of the first PTE
1748                                            // for a segment
1749    DT_MIPS_LOCAL_GOTIDX      = 0x70000026, // The GOT index of the first PTE
1750                                            // for a local symbol
1751    DT_MIPS_HIDDEN_GOTIDX     = 0x70000027, // The GOT index of the first PTE
1752                                            // for a hidden symbol
1753    DT_MIPS_PROTECTED_GOTIDX  = 0x70000028, // The GOT index of the first PTE
1754                                            // for a protected symbol
1755    DT_MIPS_OPTIONS           = 0x70000029, // Address of `.MIPS.options'.
1756    DT_MIPS_INTERFACE         = 0x7000002A, // Address of `.interface'.
1757    DT_MIPS_DYNSTR_ALIGN      = 0x7000002B, // Unknown.
1758    DT_MIPS_INTERFACE_SIZE    = 0x7000002C, // Size of the .interface section.
1759    DT_MIPS_RLD_TEXT_RESOLVE_ADDR = 0x7000002D, // Size of rld_text_resolve
1760                                                // function stored in the GOT.
1761    DT_MIPS_PERF_SUFFIX       = 0x7000002E, // Default suffix of DSO to be added
1762                                            // by rld on dlopen() calls.
1763    DT_MIPS_COMPACT_SIZE      = 0x7000002F, // Size of compact relocation
1764                                            // section (O32).
1765    DT_MIPS_GP_VALUE          = 0x70000030, // GP value for auxiliary GOTs.
1766    DT_MIPS_AUX_DYNAMIC       = 0x70000031, // Address of auxiliary .dynamic.
1767    DT_MIPS_PLTGOT            = 0x70000032, // Address of the base of the PLTGOT.
1768    DT_MIPS_RWPLT             = 0x70000034  // Points to the base
1769                                            // of a writable PLT.
1770  };
1771  
1772  // DT_FLAGS values.
1773  enum {
1774    DF_ORIGIN     = 0x01, // The object may reference $ORIGIN.
1775    DF_SYMBOLIC   = 0x02, // Search the shared lib before searching the exe.
1776    DF_TEXTREL    = 0x04, // Relocations may modify a non-writable segment.
1777    DF_BIND_NOW   = 0x08, // Process all relocations on load.
1778    DF_STATIC_TLS = 0x10  // Reject attempts to load dynamically.
1779  };
1780  
1781  // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry.
1782  enum {
1783    DF_1_NOW        = 0x00000001, // Set RTLD_NOW for this object.
1784    DF_1_GLOBAL     = 0x00000002, // Set RTLD_GLOBAL for this object.
1785    DF_1_GROUP      = 0x00000004, // Set RTLD_GROUP for this object.
1786    DF_1_NODELETE   = 0x00000008, // Set RTLD_NODELETE for this object.
1787    DF_1_LOADFLTR   = 0x00000010, // Trigger filtee loading at runtime.
1788    DF_1_INITFIRST  = 0x00000020, // Set RTLD_INITFIRST for this object.
1789    DF_1_NOOPEN     = 0x00000040, // Set RTLD_NOOPEN for this object.
1790    DF_1_ORIGIN     = 0x00000080, // $ORIGIN must be handled.
1791    DF_1_DIRECT     = 0x00000100, // Direct binding enabled.
1792    DF_1_TRANS      = 0x00000200,
1793    DF_1_INTERPOSE  = 0x00000400, // Object is used to interpose.
1794    DF_1_NODEFLIB   = 0x00000800, // Ignore default lib search path.
1795    DF_1_NODUMP     = 0x00001000, // Object can't be dldump'ed.
1796    DF_1_CONFALT    = 0x00002000, // Configuration alternative created.
1797    DF_1_ENDFILTEE  = 0x00004000, // Filtee terminates filters search.
1798    DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time.
1799    DF_1_DISPRELPND = 0x00010000  // Disp reloc applied at run-time.
1800  };
1801  
1802  // DT_MIPS_FLAGS values.
1803  enum {
1804    RHF_NONE                    = 0x00000000, // No flags.
1805    RHF_QUICKSTART              = 0x00000001, // Uses shortcut pointers.
1806    RHF_NOTPOT                  = 0x00000002, // Hash size is not a power of two.
1807    RHS_NO_LIBRARY_REPLACEMENT  = 0x00000004, // Ignore LD_LIBRARY_PATH.
1808    RHF_NO_MOVE                 = 0x00000008, // DSO address may not be relocated.
1809    RHF_SGI_ONLY                = 0x00000010, // SGI specific features.
1810    RHF_GUARANTEE_INIT          = 0x00000020, // Guarantee that .init will finish
1811                                              // executing before any non-init
1812                                              // code in DSO is called.
1813    RHF_DELTA_C_PLUS_PLUS       = 0x00000040, // Contains Delta C++ code.
1814    RHF_GUARANTEE_START_INIT    = 0x00000080, // Guarantee that .init will start
1815                                              // executing before any non-init
1816                                              // code in DSO is called.
1817    RHF_PIXIE                   = 0x00000100, // Generated by pixie.
1818    RHF_DEFAULT_DELAY_LOAD      = 0x00000200, // Delay-load DSO by default.
1819    RHF_REQUICKSTART            = 0x00000400, // Object may be requickstarted
1820    RHF_REQUICKSTARTED          = 0x00000800, // Object has been requickstarted
1821    RHF_CORD                    = 0x00001000, // Generated by cord.
1822    RHF_NO_UNRES_UNDEF          = 0x00002000, // Object contains no unresolved
1823                                              // undef symbols.
1824    RHF_RLD_ORDER_SAFE          = 0x00004000  // Symbol table is in a safe order.
1825  };
1826  
1827  // ElfXX_VerDef structure version (GNU versioning)
1828  enum {
1829    VER_DEF_NONE    = 0,
1830    VER_DEF_CURRENT = 1
1831  };
1832  
1833  // VerDef Flags (ElfXX_VerDef::vd_flags)
1834  enum {
1835    VER_FLG_BASE = 0x1,
1836    VER_FLG_WEAK = 0x2,
1837    VER_FLG_INFO = 0x4
1838  };
1839  
1840  // Special constants for the version table. (SHT_GNU_versym/.gnu.version)
1841  enum {
1842    VER_NDX_LOCAL  = 0,      // Unversioned local symbol
1843    VER_NDX_GLOBAL = 1,      // Unversioned global symbol
1844    VERSYM_VERSION = 0x7fff, // Version Index mask
1845    VERSYM_HIDDEN  = 0x8000  // Hidden bit (non-default version)
1846  };
1847  
1848  // ElfXX_VerNeed structure version (GNU versioning)
1849  enum {
1850    VER_NEED_NONE = 0,
1851    VER_NEED_CURRENT = 1
1852  };
1853  
1854  // BEGIN android-changed
1855  #endif  // ART_RUNTIME_ELF_H_
1856  // END android-changed
1857