1 //===- llvm/BinaryFormat/ELF.h - ELF constants and structures ---*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This header contains common, non-processor-specific data structures and
10 // constants for the ELF file format.
11 //
12 // The details of the ELF32 bits in this file are largely based on the Tool
13 // Interface Standard (TIS) Executable and Linking Format (ELF) Specification
14 // Version 1.2, May 1995. The ELF64 stuff is based on ELF-64 Object File Format
15 // Version 1.5, Draft 2, May 1998 as well as OpenBSD header files.
16 //
17 //===----------------------------------------------------------------------===//
18 
19 #ifndef LLVM_BINARYFORMAT_ELF_H
20 #define LLVM_BINARYFORMAT_ELF_H
21 
22 #include "llvm/ADT/StringRef.h"
23 #include <cstdint>
24 #include <cstring>
25 
26 namespace llvm {
27 namespace ELF {
28 
29 using Elf32_Addr = uint32_t; // Program address
30 using Elf32_Off = uint32_t;  // File offset
31 using Elf32_Half = uint16_t;
32 using Elf32_Word = uint32_t;
33 using Elf32_Sword = int32_t;
34 
35 using Elf64_Addr = uint64_t;
36 using Elf64_Off = uint64_t;
37 using Elf64_Half = uint16_t;
38 using Elf64_Word = uint32_t;
39 using Elf64_Sword = int32_t;
40 using Elf64_Xword = uint64_t;
41 using Elf64_Sxword = int64_t;
42 
43 // Object file magic string.
44 static const char ElfMagic[] = {0x7f, 'E', 'L', 'F', '\0'};
45 
46 // e_ident size and indices.
47 enum {
48   EI_MAG0 = 0,       // File identification index.
49   EI_MAG1 = 1,       // File identification index.
50   EI_MAG2 = 2,       // File identification index.
51   EI_MAG3 = 3,       // File identification index.
52   EI_CLASS = 4,      // File class.
53   EI_DATA = 5,       // Data encoding.
54   EI_VERSION = 6,    // File version.
55   EI_OSABI = 7,      // OS/ABI identification.
56   EI_ABIVERSION = 8, // ABI version.
57   EI_PAD = 9,        // Start of padding bytes.
58   EI_NIDENT = 16     // Number of bytes in e_ident.
59 };
60 
61 struct Elf32_Ehdr {
62   unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes
63   Elf32_Half e_type;                // Type of file (see ET_* below)
64   Elf32_Half e_machine;   // Required architecture for this file (see EM_*)
65   Elf32_Word e_version;   // Must be equal to 1
66   Elf32_Addr e_entry;     // Address to jump to in order to start program
67   Elf32_Off e_phoff;      // Program header table's file offset, in bytes
68   Elf32_Off e_shoff;      // Section header table's file offset, in bytes
69   Elf32_Word e_flags;     // Processor-specific flags
70   Elf32_Half e_ehsize;    // Size of ELF header, in bytes
71   Elf32_Half e_phentsize; // Size of an entry in the program header table
72   Elf32_Half e_phnum;     // Number of entries in the program header table
73   Elf32_Half e_shentsize; // Size of an entry in the section header table
74   Elf32_Half e_shnum;     // Number of entries in the section header table
75   Elf32_Half e_shstrndx;  // Sect hdr table index of sect name string table
76 
checkMagicElf32_Ehdr77   bool checkMagic() const {
78     return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
79   }
80 
getFileClassElf32_Ehdr81   unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
getDataEncodingElf32_Ehdr82   unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
83 };
84 
85 // 64-bit ELF header. Fields are the same as for ELF32, but with different
86 // types (see above).
87 struct Elf64_Ehdr {
88   unsigned char e_ident[EI_NIDENT];
89   Elf64_Half e_type;
90   Elf64_Half e_machine;
91   Elf64_Word e_version;
92   Elf64_Addr e_entry;
93   Elf64_Off e_phoff;
94   Elf64_Off e_shoff;
95   Elf64_Word e_flags;
96   Elf64_Half e_ehsize;
97   Elf64_Half e_phentsize;
98   Elf64_Half e_phnum;
99   Elf64_Half e_shentsize;
100   Elf64_Half e_shnum;
101   Elf64_Half e_shstrndx;
102 
checkMagicElf64_Ehdr103   bool checkMagic() const {
104     return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
105   }
106 
getFileClassElf64_Ehdr107   unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
getDataEncodingElf64_Ehdr108   unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
109 };
110 
111 // File types.
112 // See current registered ELF types at:
113 //    http://www.sco.com/developers/gabi/latest/ch4.eheader.html
114 enum {
115   ET_NONE = 0,        // No file type
116   ET_REL = 1,         // Relocatable file
117   ET_EXEC = 2,        // Executable file
118   ET_DYN = 3,         // Shared object file
119   ET_CORE = 4,        // Core file
120   ET_LOOS = 0xfe00,   // Beginning of operating system-specific codes
121   ET_HIOS = 0xfeff,   // Operating system-specific
122   ET_LOPROC = 0xff00, // Beginning of processor-specific codes
123   ET_HIPROC = 0xffff  // Processor-specific
124 };
125 
126 // Versioning
127 enum { EV_NONE = 0, EV_CURRENT = 1 };
128 
129 // Machine architectures
130 // See current registered ELF machine architectures at:
131 //    http://www.uxsglobal.com/developers/gabi/latest/ch4.eheader.html
132 enum {
133   EM_NONE = 0,           // No machine
134   EM_M32 = 1,            // AT&T WE 32100
135   EM_SPARC = 2,          // SPARC
136   EM_386 = 3,            // Intel 386
137   EM_68K = 4,            // Motorola 68000
138   EM_88K = 5,            // Motorola 88000
139   EM_IAMCU = 6,          // Intel MCU
140   EM_860 = 7,            // Intel 80860
141   EM_MIPS = 8,           // MIPS R3000
142   EM_S370 = 9,           // IBM System/370
143   EM_MIPS_RS3_LE = 10,   // MIPS RS3000 Little-endian
144   EM_PARISC = 15,        // Hewlett-Packard PA-RISC
145   EM_VPP500 = 17,        // Fujitsu VPP500
146   EM_SPARC32PLUS = 18,   // Enhanced instruction set SPARC
147   EM_960 = 19,           // Intel 80960
148   EM_PPC = 20,           // PowerPC
149   EM_PPC64 = 21,         // PowerPC64
150   EM_S390 = 22,          // IBM System/390
151   EM_SPU = 23,           // IBM SPU/SPC
152   EM_V800 = 36,          // NEC V800
153   EM_FR20 = 37,          // Fujitsu FR20
154   EM_RH32 = 38,          // TRW RH-32
155   EM_RCE = 39,           // Motorola RCE
156   EM_ARM = 40,           // ARM
157   EM_ALPHA = 41,         // DEC Alpha
158   EM_SH = 42,            // Hitachi SH
159   EM_SPARCV9 = 43,       // SPARC V9
160   EM_TRICORE = 44,       // Siemens TriCore
161   EM_ARC = 45,           // Argonaut RISC Core
162   EM_H8_300 = 46,        // Hitachi H8/300
163   EM_H8_300H = 47,       // Hitachi H8/300H
164   EM_H8S = 48,           // Hitachi H8S
165   EM_H8_500 = 49,        // Hitachi H8/500
166   EM_IA_64 = 50,         // Intel IA-64 processor architecture
167   EM_MIPS_X = 51,        // Stanford MIPS-X
168   EM_COLDFIRE = 52,      // Motorola ColdFire
169   EM_68HC12 = 53,        // Motorola M68HC12
170   EM_MMA = 54,           // Fujitsu MMA Multimedia Accelerator
171   EM_PCP = 55,           // Siemens PCP
172   EM_NCPU = 56,          // Sony nCPU embedded RISC processor
173   EM_NDR1 = 57,          // Denso NDR1 microprocessor
174   EM_STARCORE = 58,      // Motorola Star*Core processor
175   EM_ME16 = 59,          // Toyota ME16 processor
176   EM_ST100 = 60,         // STMicroelectronics ST100 processor
177   EM_TINYJ = 61,         // Advanced Logic Corp. TinyJ embedded processor family
178   EM_X86_64 = 62,        // AMD x86-64 architecture
179   EM_PDSP = 63,          // Sony DSP Processor
180   EM_PDP10 = 64,         // Digital Equipment Corp. PDP-10
181   EM_PDP11 = 65,         // Digital Equipment Corp. PDP-11
182   EM_FX66 = 66,          // Siemens FX66 microcontroller
183   EM_ST9PLUS = 67,       // STMicroelectronics ST9+ 8/16 bit microcontroller
184   EM_ST7 = 68,           // STMicroelectronics ST7 8-bit microcontroller
185   EM_68HC16 = 69,        // Motorola MC68HC16 Microcontroller
186   EM_68HC11 = 70,        // Motorola MC68HC11 Microcontroller
187   EM_68HC08 = 71,        // Motorola MC68HC08 Microcontroller
188   EM_68HC05 = 72,        // Motorola MC68HC05 Microcontroller
189   EM_SVX = 73,           // Silicon Graphics SVx
190   EM_ST19 = 74,          // STMicroelectronics ST19 8-bit microcontroller
191   EM_VAX = 75,           // Digital VAX
192   EM_CRIS = 76,          // Axis Communications 32-bit embedded processor
193   EM_JAVELIN = 77,       // Infineon Technologies 32-bit embedded processor
194   EM_FIREPATH = 78,      // Element 14 64-bit DSP Processor
195   EM_ZSP = 79,           // LSI Logic 16-bit DSP Processor
196   EM_MMIX = 80,          // Donald Knuth's educational 64-bit processor
197   EM_HUANY = 81,         // Harvard University machine-independent object files
198   EM_PRISM = 82,         // SiTera Prism
199   EM_AVR = 83,           // Atmel AVR 8-bit microcontroller
200   EM_FR30 = 84,          // Fujitsu FR30
201   EM_D10V = 85,          // Mitsubishi D10V
202   EM_D30V = 86,          // Mitsubishi D30V
203   EM_V850 = 87,          // NEC v850
204   EM_M32R = 88,          // Mitsubishi M32R
205   EM_MN10300 = 89,       // Matsushita MN10300
206   EM_MN10200 = 90,       // Matsushita MN10200
207   EM_PJ = 91,            // picoJava
208   EM_OPENRISC = 92,      // OpenRISC 32-bit embedded processor
209   EM_ARC_COMPACT = 93,   // ARC International ARCompact processor (old
210                          // spelling/synonym: EM_ARC_A5)
211   EM_XTENSA = 94,        // Tensilica Xtensa Architecture
212   EM_VIDEOCORE = 95,     // Alphamosaic VideoCore processor
213   EM_TMM_GPP = 96,       // Thompson Multimedia General Purpose Processor
214   EM_NS32K = 97,         // National Semiconductor 32000 series
215   EM_TPC = 98,           // Tenor Network TPC processor
216   EM_SNP1K = 99,         // Trebia SNP 1000 processor
217   EM_ST200 = 100,        // STMicroelectronics (www.st.com) ST200
218   EM_IP2K = 101,         // Ubicom IP2xxx microcontroller family
219   EM_MAX = 102,          // MAX Processor
220   EM_CR = 103,           // National Semiconductor CompactRISC microprocessor
221   EM_F2MC16 = 104,       // Fujitsu F2MC16
222   EM_MSP430 = 105,       // Texas Instruments embedded microcontroller msp430
223   EM_BLACKFIN = 106,     // Analog Devices Blackfin (DSP) processor
224   EM_SE_C33 = 107,       // S1C33 Family of Seiko Epson processors
225   EM_SEP = 108,          // Sharp embedded microprocessor
226   EM_ARCA = 109,         // Arca RISC Microprocessor
227   EM_UNICORE = 110,      // Microprocessor series from PKU-Unity Ltd. and MPRC
228                          // of Peking University
229   EM_EXCESS = 111,       // eXcess: 16/32/64-bit configurable embedded CPU
230   EM_DXP = 112,          // Icera Semiconductor Inc. Deep Execution Processor
231   EM_ALTERA_NIOS2 = 113, // Altera Nios II soft-core processor
232   EM_CRX = 114,          // National Semiconductor CompactRISC CRX
233   EM_XGATE = 115,        // Motorola XGATE embedded processor
234   EM_C166 = 116,         // Infineon C16x/XC16x processor
235   EM_M16C = 117,         // Renesas M16C series microprocessors
236   EM_DSPIC30F = 118,     // Microchip Technology dsPIC30F Digital Signal
237                          // Controller
238   EM_CE = 119,           // Freescale Communication Engine RISC core
239   EM_M32C = 120,         // Renesas M32C series microprocessors
240   EM_TSK3000 = 131,      // Altium TSK3000 core
241   EM_RS08 = 132,         // Freescale RS08 embedded processor
242   EM_SHARC = 133,        // Analog Devices SHARC family of 32-bit DSP
243                          // processors
244   EM_ECOG2 = 134,        // Cyan Technology eCOG2 microprocessor
245   EM_SCORE7 = 135,       // Sunplus S+core7 RISC processor
246   EM_DSP24 = 136,        // New Japan Radio (NJR) 24-bit DSP Processor
247   EM_VIDEOCORE3 = 137,   // Broadcom VideoCore III processor
248   EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture
249   EM_SE_C17 = 139,        // Seiko Epson C17 family
250   EM_TI_C6000 = 140,      // The Texas Instruments TMS320C6000 DSP family
251   EM_TI_C2000 = 141,      // The Texas Instruments TMS320C2000 DSP family
252   EM_TI_C5500 = 142,      // The Texas Instruments TMS320C55x DSP family
253   EM_MMDSP_PLUS = 160,    // STMicroelectronics 64bit VLIW Data Signal Processor
254   EM_CYPRESS_M8C = 161,   // Cypress M8C microprocessor
255   EM_R32C = 162,          // Renesas R32C series microprocessors
256   EM_TRIMEDIA = 163,      // NXP Semiconductors TriMedia architecture family
257   EM_HEXAGON = 164,       // Qualcomm Hexagon processor
258   EM_8051 = 165,          // Intel 8051 and variants
259   EM_STXP7X = 166,        // STMicroelectronics STxP7x family of configurable
260                           // and extensible RISC processors
261   EM_NDS32 = 167,         // Andes Technology compact code size embedded RISC
262                           // processor family
263   EM_ECOG1 = 168,         // Cyan Technology eCOG1X family
264   EM_ECOG1X = 168,        // Cyan Technology eCOG1X family
265   EM_MAXQ30 = 169,        // Dallas Semiconductor MAXQ30 Core Micro-controllers
266   EM_XIMO16 = 170,        // New Japan Radio (NJR) 16-bit DSP Processor
267   EM_MANIK = 171,         // M2000 Reconfigurable RISC Microprocessor
268   EM_CRAYNV2 = 172,       // Cray Inc. NV2 vector architecture
269   EM_RX = 173,            // Renesas RX family
270   EM_METAG = 174,         // Imagination Technologies META processor
271                           // architecture
272   EM_MCST_ELBRUS = 175,   // MCST Elbrus general purpose hardware architecture
273   EM_ECOG16 = 176,        // Cyan Technology eCOG16 family
274   EM_CR16 = 177,          // National Semiconductor CompactRISC CR16 16-bit
275                           // microprocessor
276   EM_ETPU = 178,          // Freescale Extended Time Processing Unit
277   EM_SLE9X = 179,         // Infineon Technologies SLE9X core
278   EM_L10M = 180,          // Intel L10M
279   EM_K10M = 181,          // Intel K10M
280   EM_AARCH64 = 183,       // ARM AArch64
281   EM_AVR32 = 185,         // Atmel Corporation 32-bit microprocessor family
282   EM_STM8 = 186,          // STMicroeletronics STM8 8-bit microcontroller
283   EM_TILE64 = 187,        // Tilera TILE64 multicore architecture family
284   EM_TILEPRO = 188,       // Tilera TILEPro multicore architecture family
285   EM_MICROBLAZE = 189,    // Xilinx MicroBlaze 32-bit RISC soft processor core
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   EM_BA1 = 201,           // Beyond BA1 CPU architecture
298   EM_BA2 = 202,           // Beyond BA2 CPU architecture
299   EM_XCORE = 203,         // XMOS xCORE processor family
300   EM_MCHP_PIC = 204,      // Microchip 8-bit PIC(r) family
301   EM_INTEL205 = 205,      // Reserved by Intel
302   EM_INTEL206 = 206,      // Reserved by Intel
303   EM_INTEL207 = 207,      // Reserved by Intel
304   EM_INTEL208 = 208,      // Reserved by Intel
305   EM_INTEL209 = 209,      // Reserved by Intel
306   EM_KM32 = 210,          // KM211 KM32 32-bit processor
307   EM_KMX32 = 211,         // KM211 KMX32 32-bit processor
308   EM_KMX16 = 212,         // KM211 KMX16 16-bit processor
309   EM_KMX8 = 213,          // KM211 KMX8 8-bit processor
310   EM_KVARC = 214,         // KM211 KVARC processor
311   EM_CDP = 215,           // Paneve CDP architecture family
312   EM_COGE = 216,          // Cognitive Smart Memory Processor
313   EM_COOL = 217,          // iCelero CoolEngine
314   EM_NORC = 218,          // Nanoradio Optimized RISC
315   EM_CSR_KALIMBA = 219,   // CSR Kalimba architecture family
316   EM_AMDGPU = 224,        // AMD GPU architecture
317   EM_RISCV = 243,         // RISC-V
318   EM_LANAI = 244,         // Lanai 32-bit processor
319   EM_BPF = 247,           // Linux kernel bpf virtual machine
320   EM_VE = 251,            // NEC SX-Aurora VE
321   EM_CSKY = 252,          // C-SKY 32-bit processor
322   EM_LOONGARCH = 258,     // LoongArch
323 };
324 
325 // Object file classes.
326 enum {
327   ELFCLASSNONE = 0,
328   ELFCLASS32 = 1, // 32-bit object file
329   ELFCLASS64 = 2  // 64-bit object file
330 };
331 
332 // Object file byte orderings.
333 enum {
334   ELFDATANONE = 0, // Invalid data encoding.
335   ELFDATA2LSB = 1, // Little-endian object file
336   ELFDATA2MSB = 2  // Big-endian object file
337 };
338 
339 // OS ABI identification.
340 enum {
341   ELFOSABI_NONE = 0,           // UNIX System V ABI
342   ELFOSABI_HPUX = 1,           // HP-UX operating system
343   ELFOSABI_NETBSD = 2,         // NetBSD
344   ELFOSABI_GNU = 3,            // GNU/Linux
345   ELFOSABI_LINUX = 3,          // Historical alias for ELFOSABI_GNU.
346   ELFOSABI_HURD = 4,           // GNU/Hurd
347   ELFOSABI_SOLARIS = 6,        // Solaris
348   ELFOSABI_AIX = 7,            // AIX
349   ELFOSABI_IRIX = 8,           // IRIX
350   ELFOSABI_FREEBSD = 9,        // FreeBSD
351   ELFOSABI_TRU64 = 10,         // TRU64 UNIX
352   ELFOSABI_MODESTO = 11,       // Novell Modesto
353   ELFOSABI_OPENBSD = 12,       // OpenBSD
354   ELFOSABI_OPENVMS = 13,       // OpenVMS
355   ELFOSABI_NSK = 14,           // Hewlett-Packard Non-Stop Kernel
356   ELFOSABI_AROS = 15,          // AROS
357   ELFOSABI_FENIXOS = 16,       // FenixOS
358   ELFOSABI_CLOUDABI = 17,      // Nuxi CloudABI
359   ELFOSABI_FIRST_ARCH = 64,    // First architecture-specific OS ABI
360   ELFOSABI_AMDGPU_HSA = 64,    // AMD HSA runtime
361   ELFOSABI_AMDGPU_PAL = 65,    // AMD PAL runtime
362   ELFOSABI_AMDGPU_MESA3D = 66, // AMD GCN GPUs (GFX6+) for MESA runtime
363   ELFOSABI_ARM = 97,           // ARM
364   ELFOSABI_C6000_ELFABI = 64,  // Bare-metal TMS320C6000
365   ELFOSABI_C6000_LINUX = 65,   // Linux TMS320C6000
366   ELFOSABI_STANDALONE = 255,   // Standalone (embedded) application
367   ELFOSABI_LAST_ARCH = 255     // Last Architecture-specific OS ABI
368 };
369 
370 // AMDGPU OS ABI Version identification.
371 enum {
372   // ELFABIVERSION_AMDGPU_HSA_V1 does not exist because OS ABI identification
373   // was never defined for V1.
374   ELFABIVERSION_AMDGPU_HSA_V2 = 0,
375   ELFABIVERSION_AMDGPU_HSA_V3 = 1,
376   ELFABIVERSION_AMDGPU_HSA_V4 = 2,
377   ELFABIVERSION_AMDGPU_HSA_V5 = 3
378 };
379 
380 #define ELF_RELOC(name, value) name = value,
381 
382 // X86_64 relocations.
383 enum {
384 #include "ELFRelocs/x86_64.def"
385 };
386 
387 // i386 relocations.
388 enum {
389 #include "ELFRelocs/i386.def"
390 };
391 
392 // ELF Relocation types for PPC32
393 enum {
394 #include "ELFRelocs/PowerPC.def"
395 };
396 
397 // Specific e_flags for PPC64
398 enum {
399   // e_flags bits specifying ABI:
400   // 1 for original ABI using function descriptors,
401   // 2 for revised ABI without function descriptors,
402   // 0 for unspecified or not using any features affected by the differences.
403   EF_PPC64_ABI = 3
404 };
405 
406 // Special values for the st_other field in the symbol table entry for PPC64.
407 enum {
408   STO_PPC64_LOCAL_BIT = 5,
409   STO_PPC64_LOCAL_MASK = (7 << STO_PPC64_LOCAL_BIT)
410 };
decodePPC64LocalEntryOffset(unsigned Other)411 static inline int64_t decodePPC64LocalEntryOffset(unsigned Other) {
412   unsigned Val = (Other & STO_PPC64_LOCAL_MASK) >> STO_PPC64_LOCAL_BIT;
413   return ((1 << Val) >> 2) << 2;
414 }
415 
416 // ELF Relocation types for PPC64
417 enum {
418 #include "ELFRelocs/PowerPC64.def"
419 };
420 
421 // ELF Relocation types for AArch64
422 enum {
423 #include "ELFRelocs/AArch64.def"
424 };
425 
426 // Special values for the st_other field in the symbol table entry for AArch64.
427 enum {
428   // Symbol may follow different calling convention than base PCS.
429   STO_AARCH64_VARIANT_PCS = 0x80
430 };
431 
432 // ARM Specific e_flags
433 enum : unsigned {
434   EF_ARM_SOFT_FLOAT = 0x00000200U,     // Legacy pre EABI_VER5
435   EF_ARM_ABI_FLOAT_SOFT = 0x00000200U, // EABI_VER5
436   EF_ARM_VFP_FLOAT = 0x00000400U,      // Legacy pre EABI_VER5
437   EF_ARM_ABI_FLOAT_HARD = 0x00000400U, // EABI_VER5
438   EF_ARM_BE8 = 0x00800000U,
439   EF_ARM_EABI_UNKNOWN = 0x00000000U,
440   EF_ARM_EABI_VER1 = 0x01000000U,
441   EF_ARM_EABI_VER2 = 0x02000000U,
442   EF_ARM_EABI_VER3 = 0x03000000U,
443   EF_ARM_EABI_VER4 = 0x04000000U,
444   EF_ARM_EABI_VER5 = 0x05000000U,
445   EF_ARM_EABIMASK = 0xFF000000U
446 };
447 
448 // ELF Relocation types for ARM
449 enum {
450 #include "ELFRelocs/ARM.def"
451 };
452 
453 // ARC Specific e_flags
454 enum : unsigned {
455   EF_ARC_MACH_MSK = 0x000000ff,
456   EF_ARC_OSABI_MSK = 0x00000f00,
457   E_ARC_MACH_ARC600 = 0x00000002,
458   E_ARC_MACH_ARC601 = 0x00000004,
459   E_ARC_MACH_ARC700 = 0x00000003,
460   EF_ARC_CPU_ARCV2EM = 0x00000005,
461   EF_ARC_CPU_ARCV2HS = 0x00000006,
462   E_ARC_OSABI_ORIG = 0x00000000,
463   E_ARC_OSABI_V2 = 0x00000200,
464   E_ARC_OSABI_V3 = 0x00000300,
465   E_ARC_OSABI_V4 = 0x00000400,
466   EF_ARC_PIC = 0x00000100
467 };
468 
469 // ELF Relocation types for ARC
470 enum {
471 #include "ELFRelocs/ARC.def"
472 };
473 
474 // AVR specific e_flags
475 enum : unsigned {
476   EF_AVR_ARCH_AVR1 = 1,
477   EF_AVR_ARCH_AVR2 = 2,
478   EF_AVR_ARCH_AVR25 = 25,
479   EF_AVR_ARCH_AVR3 = 3,
480   EF_AVR_ARCH_AVR31 = 31,
481   EF_AVR_ARCH_AVR35 = 35,
482   EF_AVR_ARCH_AVR4 = 4,
483   EF_AVR_ARCH_AVR5 = 5,
484   EF_AVR_ARCH_AVR51 = 51,
485   EF_AVR_ARCH_AVR6 = 6,
486   EF_AVR_ARCH_AVRTINY = 100,
487   EF_AVR_ARCH_XMEGA1 = 101,
488   EF_AVR_ARCH_XMEGA2 = 102,
489   EF_AVR_ARCH_XMEGA3 = 103,
490   EF_AVR_ARCH_XMEGA4 = 104,
491   EF_AVR_ARCH_XMEGA5 = 105,
492   EF_AVR_ARCH_XMEGA6 = 106,
493   EF_AVR_ARCH_XMEGA7 = 107,
494 
495   EF_AVR_ARCH_MASK = 0x7f, // EF_AVR_ARCH_xxx selection mask
496 
497   EF_AVR_LINKRELAX_PREPARED = 0x80, // The file is prepared for linker
498                                     // relaxation to be applied
499 };
500 
501 // ELF Relocation types for AVR
502 enum {
503 #include "ELFRelocs/AVR.def"
504 };
505 
506 // Mips Specific e_flags
507 enum : unsigned {
508   EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions
509   EF_MIPS_PIC = 0x00000002,       // Position independent code
510   EF_MIPS_CPIC = 0x00000004,      // Call object with Position independent code
511   EF_MIPS_ABI2 = 0x00000020,      // File uses N32 ABI
512   EF_MIPS_32BITMODE = 0x00000100, // Code compiled for a 64-bit machine
513                                   // in 32-bit mode
514   EF_MIPS_FP64 = 0x00000200,      // Code compiled for a 32-bit machine
515                                   // but uses 64-bit FP registers
516   EF_MIPS_NAN2008 = 0x00000400,   // Uses IEE 754-2008 NaN encoding
517 
518   // ABI flags
519   EF_MIPS_ABI_O32 = 0x00001000, // This file follows the first MIPS 32 bit ABI
520   EF_MIPS_ABI_O64 = 0x00002000, // O32 ABI extended for 64-bit architecture.
521   EF_MIPS_ABI_EABI32 = 0x00003000, // EABI in 32 bit mode.
522   EF_MIPS_ABI_EABI64 = 0x00004000, // EABI in 64 bit mode.
523   EF_MIPS_ABI = 0x0000f000,        // Mask for selecting EF_MIPS_ABI_ variant.
524 
525   // MIPS machine variant
526   EF_MIPS_MACH_NONE = 0x00000000,    // A standard MIPS implementation.
527   EF_MIPS_MACH_3900 = 0x00810000,    // Toshiba R3900
528   EF_MIPS_MACH_4010 = 0x00820000,    // LSI R4010
529   EF_MIPS_MACH_4100 = 0x00830000,    // NEC VR4100
530   EF_MIPS_MACH_4650 = 0x00850000,    // MIPS R4650
531   EF_MIPS_MACH_4120 = 0x00870000,    // NEC VR4120
532   EF_MIPS_MACH_4111 = 0x00880000,    // NEC VR4111/VR4181
533   EF_MIPS_MACH_SB1 = 0x008a0000,     // Broadcom SB-1
534   EF_MIPS_MACH_OCTEON = 0x008b0000,  // Cavium Networks Octeon
535   EF_MIPS_MACH_XLR = 0x008c0000,     // RMI Xlr
536   EF_MIPS_MACH_OCTEON2 = 0x008d0000, // Cavium Networks Octeon2
537   EF_MIPS_MACH_OCTEON3 = 0x008e0000, // Cavium Networks Octeon3
538   EF_MIPS_MACH_5400 = 0x00910000,    // NEC VR5400
539   EF_MIPS_MACH_5900 = 0x00920000,    // MIPS R5900
540   EF_MIPS_MACH_5500 = 0x00980000,    // NEC VR5500
541   EF_MIPS_MACH_9000 = 0x00990000,    // Unknown
542   EF_MIPS_MACH_LS2E = 0x00a00000,    // ST Microelectronics Loongson 2E
543   EF_MIPS_MACH_LS2F = 0x00a10000,    // ST Microelectronics Loongson 2F
544   EF_MIPS_MACH_LS3A = 0x00a20000,    // Loongson 3A
545   EF_MIPS_MACH = 0x00ff0000,         // EF_MIPS_MACH_xxx selection mask
546 
547   // ARCH_ASE
548   EF_MIPS_MICROMIPS = 0x02000000,     // microMIPS
549   EF_MIPS_ARCH_ASE_M16 = 0x04000000,  // Has Mips-16 ISA extensions
550   EF_MIPS_ARCH_ASE_MDMX = 0x08000000, // Has MDMX multimedia extensions
551   EF_MIPS_ARCH_ASE = 0x0f000000,      // Mask for EF_MIPS_ARCH_ASE_xxx flags
552 
553   // ARCH
554   EF_MIPS_ARCH_1 = 0x00000000,    // MIPS1 instruction set
555   EF_MIPS_ARCH_2 = 0x10000000,    // MIPS2 instruction set
556   EF_MIPS_ARCH_3 = 0x20000000,    // MIPS3 instruction set
557   EF_MIPS_ARCH_4 = 0x30000000,    // MIPS4 instruction set
558   EF_MIPS_ARCH_5 = 0x40000000,    // MIPS5 instruction set
559   EF_MIPS_ARCH_32 = 0x50000000,   // MIPS32 instruction set per linux not elf.h
560   EF_MIPS_ARCH_64 = 0x60000000,   // MIPS64 instruction set per linux not elf.h
561   EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2, mips32r3, mips32r5
562   EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2, mips64r3, mips64r5
563   EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6
564   EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6
565   EF_MIPS_ARCH = 0xf0000000       // Mask for applying EF_MIPS_ARCH_ variant
566 };
567 
568 // MIPS-specific section indexes
569 enum {
570   SHN_MIPS_ACOMMON = 0xff00,   // Common symbols which are defined and allocated
571   SHN_MIPS_TEXT = 0xff01,      // Not ABI compliant
572   SHN_MIPS_DATA = 0xff02,      // Not ABI compliant
573   SHN_MIPS_SCOMMON = 0xff03,   // Common symbols for global data area
574   SHN_MIPS_SUNDEFINED = 0xff04 // Undefined symbols for global data area
575 };
576 
577 // ELF Relocation types for Mips
578 enum {
579 #include "ELFRelocs/Mips.def"
580 };
581 
582 // Special values for the st_other field in the symbol table entry for MIPS.
583 enum {
584   STO_MIPS_OPTIONAL = 0x04,  // Symbol whose definition is optional
585   STO_MIPS_PLT = 0x08,       // PLT entry related dynamic table record
586   STO_MIPS_PIC = 0x20,       // PIC func in an object mixes PIC/non-PIC
587   STO_MIPS_MICROMIPS = 0x80, // MIPS Specific ISA for MicroMips
588   STO_MIPS_MIPS16 = 0xf0     // MIPS Specific ISA for Mips16
589 };
590 
591 // .MIPS.options section descriptor kinds
592 enum {
593   ODK_NULL = 0,       // Undefined
594   ODK_REGINFO = 1,    // Register usage information
595   ODK_EXCEPTIONS = 2, // Exception processing options
596   ODK_PAD = 3,        // Section padding options
597   ODK_HWPATCH = 4,    // Hardware patches applied
598   ODK_FILL = 5,       // Linker fill value
599   ODK_TAGS = 6,       // Space for tool identification
600   ODK_HWAND = 7,      // Hardware AND patches applied
601   ODK_HWOR = 8,       // Hardware OR patches applied
602   ODK_GP_GROUP = 9,   // GP group to use for text/data sections
603   ODK_IDENT = 10,     // ID information
604   ODK_PAGESIZE = 11   // Page size information
605 };
606 
607 // Hexagon-specific e_flags
608 enum {
609   // Object processor version flags, bits[11:0]
610   EF_HEXAGON_MACH_V2 = 0x00000001,   // Hexagon V2
611   EF_HEXAGON_MACH_V3 = 0x00000002,   // Hexagon V3
612   EF_HEXAGON_MACH_V4 = 0x00000003,   // Hexagon V4
613   EF_HEXAGON_MACH_V5 = 0x00000004,   // Hexagon V5
614   EF_HEXAGON_MACH_V55 = 0x00000005,  // Hexagon V55
615   EF_HEXAGON_MACH_V60 = 0x00000060,  // Hexagon V60
616   EF_HEXAGON_MACH_V62 = 0x00000062,  // Hexagon V62
617   EF_HEXAGON_MACH_V65 = 0x00000065,  // Hexagon V65
618   EF_HEXAGON_MACH_V66 = 0x00000066,  // Hexagon V66
619   EF_HEXAGON_MACH_V67 = 0x00000067,  // Hexagon V67
620   EF_HEXAGON_MACH_V67T = 0x00008067, // Hexagon V67T
621   EF_HEXAGON_MACH_V68 = 0x00000068,  // Hexagon V68
622   EF_HEXAGON_MACH_V69 = 0x00000069,  // Hexagon V69
623   EF_HEXAGON_MACH_V71 = 0x00000071,  // Hexagon V71
624   EF_HEXAGON_MACH_V71T = 0x00008071, // Hexagon V71T
625   EF_HEXAGON_MACH_V73 = 0x00000073,  // Hexagon V73
626   EF_HEXAGON_MACH = 0x000003ff,      // Hexagon V..
627 
628   // Highest ISA version flags
629   EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[11:0]
630                                     // of e_flags
631   EF_HEXAGON_ISA_V2 = 0x00000010,   // Hexagon V2 ISA
632   EF_HEXAGON_ISA_V3 = 0x00000020,   // Hexagon V3 ISA
633   EF_HEXAGON_ISA_V4 = 0x00000030,   // Hexagon V4 ISA
634   EF_HEXAGON_ISA_V5 = 0x00000040,   // Hexagon V5 ISA
635   EF_HEXAGON_ISA_V55 = 0x00000050,  // Hexagon V55 ISA
636   EF_HEXAGON_ISA_V60 = 0x00000060,  // Hexagon V60 ISA
637   EF_HEXAGON_ISA_V62 = 0x00000062,  // Hexagon V62 ISA
638   EF_HEXAGON_ISA_V65 = 0x00000065,  // Hexagon V65 ISA
639   EF_HEXAGON_ISA_V66 = 0x00000066,  // Hexagon V66 ISA
640   EF_HEXAGON_ISA_V67 = 0x00000067,  // Hexagon V67 ISA
641   EF_HEXAGON_ISA_V68 = 0x00000068,  // Hexagon V68 ISA
642   EF_HEXAGON_ISA_V69 = 0x00000069,  // Hexagon V69 ISA
643   EF_HEXAGON_ISA_V71 = 0x00000071,  // Hexagon V71 ISA
644   EF_HEXAGON_ISA_V73 = 0x00000073,  // Hexagon V73 ISA
645   EF_HEXAGON_ISA_V75 = 0x00000075,  // Hexagon V75 ISA
646   EF_HEXAGON_ISA = 0x000003ff,      // Hexagon V.. ISA
647 };
648 
649 // Hexagon-specific section indexes for common small data
650 enum {
651   SHN_HEXAGON_SCOMMON = 0xff00,   // Other access sizes
652   SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access
653   SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access
654   SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access
655   SHN_HEXAGON_SCOMMON_8 = 0xff04  // Double-word-size access
656 };
657 
658 // ELF Relocation types for Hexagon
659 enum {
660 #include "ELFRelocs/Hexagon.def"
661 };
662 
663 // ELF Relocation type for Lanai.
664 enum {
665 #include "ELFRelocs/Lanai.def"
666 };
667 
668 // RISCV Specific e_flags
669 enum : unsigned {
670   EF_RISCV_RVC = 0x0001,
671   EF_RISCV_FLOAT_ABI = 0x0006,
672   EF_RISCV_FLOAT_ABI_SOFT = 0x0000,
673   EF_RISCV_FLOAT_ABI_SINGLE = 0x0002,
674   EF_RISCV_FLOAT_ABI_DOUBLE = 0x0004,
675   EF_RISCV_FLOAT_ABI_QUAD = 0x0006,
676   EF_RISCV_RVE = 0x0008,
677   EF_RISCV_TSO = 0x0010,
678 };
679 
680 // ELF Relocation types for RISC-V
681 enum {
682 #include "ELFRelocs/RISCV.def"
683 };
684 
685 enum {
686   // Symbol may follow different calling convention than the standard calling
687   // convention.
688   STO_RISCV_VARIANT_CC = 0x80
689 };
690 
691 // ELF Relocation types for S390/zSeries
692 enum {
693 #include "ELFRelocs/SystemZ.def"
694 };
695 
696 // ELF Relocation type for Sparc.
697 enum {
698 #include "ELFRelocs/Sparc.def"
699 };
700 
701 // AMDGPU specific e_flags.
702 enum : unsigned {
703   // Processor selection mask for EF_AMDGPU_MACH_* values.
704   EF_AMDGPU_MACH = 0x0ff,
705 
706   // Not specified processor.
707   EF_AMDGPU_MACH_NONE = 0x000,
708 
709   // R600-based processors.
710 
711   // Radeon HD 2000/3000 Series (R600).
712   EF_AMDGPU_MACH_R600_R600 = 0x001,
713   EF_AMDGPU_MACH_R600_R630 = 0x002,
714   EF_AMDGPU_MACH_R600_RS880 = 0x003,
715   EF_AMDGPU_MACH_R600_RV670 = 0x004,
716   // Radeon HD 4000 Series (R700).
717   EF_AMDGPU_MACH_R600_RV710 = 0x005,
718   EF_AMDGPU_MACH_R600_RV730 = 0x006,
719   EF_AMDGPU_MACH_R600_RV770 = 0x007,
720   // Radeon HD 5000 Series (Evergreen).
721   EF_AMDGPU_MACH_R600_CEDAR = 0x008,
722   EF_AMDGPU_MACH_R600_CYPRESS = 0x009,
723   EF_AMDGPU_MACH_R600_JUNIPER = 0x00a,
724   EF_AMDGPU_MACH_R600_REDWOOD = 0x00b,
725   EF_AMDGPU_MACH_R600_SUMO = 0x00c,
726   // Radeon HD 6000 Series (Northern Islands).
727   EF_AMDGPU_MACH_R600_BARTS = 0x00d,
728   EF_AMDGPU_MACH_R600_CAICOS = 0x00e,
729   EF_AMDGPU_MACH_R600_CAYMAN = 0x00f,
730   EF_AMDGPU_MACH_R600_TURKS = 0x010,
731 
732   // Reserved for R600-based processors.
733   EF_AMDGPU_MACH_R600_RESERVED_FIRST = 0x011,
734   EF_AMDGPU_MACH_R600_RESERVED_LAST = 0x01f,
735 
736   // First/last R600-based processors.
737   EF_AMDGPU_MACH_R600_FIRST = EF_AMDGPU_MACH_R600_R600,
738   EF_AMDGPU_MACH_R600_LAST = EF_AMDGPU_MACH_R600_TURKS,
739 
740   // AMDGCN-based processors.
741   EF_AMDGPU_MACH_AMDGCN_GFX600        = 0x020,
742   EF_AMDGPU_MACH_AMDGCN_GFX601        = 0x021,
743   EF_AMDGPU_MACH_AMDGCN_GFX700        = 0x022,
744   EF_AMDGPU_MACH_AMDGCN_GFX701        = 0x023,
745   EF_AMDGPU_MACH_AMDGCN_GFX702        = 0x024,
746   EF_AMDGPU_MACH_AMDGCN_GFX703        = 0x025,
747   EF_AMDGPU_MACH_AMDGCN_GFX704        = 0x026,
748   EF_AMDGPU_MACH_AMDGCN_RESERVED_0X27 = 0x027,
749   EF_AMDGPU_MACH_AMDGCN_GFX801        = 0x028,
750   EF_AMDGPU_MACH_AMDGCN_GFX802        = 0x029,
751   EF_AMDGPU_MACH_AMDGCN_GFX803        = 0x02a,
752   EF_AMDGPU_MACH_AMDGCN_GFX810        = 0x02b,
753   EF_AMDGPU_MACH_AMDGCN_GFX900        = 0x02c,
754   EF_AMDGPU_MACH_AMDGCN_GFX902        = 0x02d,
755   EF_AMDGPU_MACH_AMDGCN_GFX904        = 0x02e,
756   EF_AMDGPU_MACH_AMDGCN_GFX906        = 0x02f,
757   EF_AMDGPU_MACH_AMDGCN_GFX908        = 0x030,
758   EF_AMDGPU_MACH_AMDGCN_GFX909        = 0x031,
759   EF_AMDGPU_MACH_AMDGCN_GFX90C        = 0x032,
760   EF_AMDGPU_MACH_AMDGCN_GFX1010       = 0x033,
761   EF_AMDGPU_MACH_AMDGCN_GFX1011       = 0x034,
762   EF_AMDGPU_MACH_AMDGCN_GFX1012       = 0x035,
763   EF_AMDGPU_MACH_AMDGCN_GFX1030       = 0x036,
764   EF_AMDGPU_MACH_AMDGCN_GFX1031       = 0x037,
765   EF_AMDGPU_MACH_AMDGCN_GFX1032       = 0x038,
766   EF_AMDGPU_MACH_AMDGCN_GFX1033       = 0x039,
767   EF_AMDGPU_MACH_AMDGCN_GFX602        = 0x03a,
768   EF_AMDGPU_MACH_AMDGCN_GFX705        = 0x03b,
769   EF_AMDGPU_MACH_AMDGCN_GFX805        = 0x03c,
770   EF_AMDGPU_MACH_AMDGCN_GFX1035       = 0x03d,
771   EF_AMDGPU_MACH_AMDGCN_GFX1034       = 0x03e,
772   EF_AMDGPU_MACH_AMDGCN_GFX90A        = 0x03f,
773   EF_AMDGPU_MACH_AMDGCN_GFX940        = 0x040,
774   EF_AMDGPU_MACH_AMDGCN_GFX1100       = 0x041,
775   EF_AMDGPU_MACH_AMDGCN_GFX1013       = 0x042,
776   EF_AMDGPU_MACH_AMDGCN_RESERVED_0X43 = 0x043,
777   EF_AMDGPU_MACH_AMDGCN_GFX1103       = 0x044,
778   EF_AMDGPU_MACH_AMDGCN_GFX1036       = 0x045,
779   EF_AMDGPU_MACH_AMDGCN_GFX1101       = 0x046,
780   EF_AMDGPU_MACH_AMDGCN_GFX1102       = 0x047,
781 
782   // First/last AMDGCN-based processors.
783   EF_AMDGPU_MACH_AMDGCN_FIRST = EF_AMDGPU_MACH_AMDGCN_GFX600,
784   EF_AMDGPU_MACH_AMDGCN_LAST = EF_AMDGPU_MACH_AMDGCN_GFX1102,
785 
786   // Indicates if the "xnack" target feature is enabled for all code contained
787   // in the object.
788   //
789   // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V2.
790   EF_AMDGPU_FEATURE_XNACK_V2 = 0x01,
791   // Indicates if the trap handler is enabled for all code contained
792   // in the object.
793   //
794   // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V2.
795   EF_AMDGPU_FEATURE_TRAP_HANDLER_V2 = 0x02,
796 
797   // Indicates if the "xnack" target feature is enabled for all code contained
798   // in the object.
799   //
800   // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V3.
801   EF_AMDGPU_FEATURE_XNACK_V3 = 0x100,
802   // Indicates if the "sramecc" target feature is enabled for all code
803   // contained in the object.
804   //
805   // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V3.
806   EF_AMDGPU_FEATURE_SRAMECC_V3 = 0x200,
807 
808   // XNACK selection mask for EF_AMDGPU_FEATURE_XNACK_* values.
809   //
810   // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V4.
811   EF_AMDGPU_FEATURE_XNACK_V4 = 0x300,
812   // XNACK is not supported.
813   EF_AMDGPU_FEATURE_XNACK_UNSUPPORTED_V4 = 0x000,
814   // XNACK is any/default/unspecified.
815   EF_AMDGPU_FEATURE_XNACK_ANY_V4 = 0x100,
816   // XNACK is off.
817   EF_AMDGPU_FEATURE_XNACK_OFF_V4 = 0x200,
818   // XNACK is on.
819   EF_AMDGPU_FEATURE_XNACK_ON_V4 = 0x300,
820 
821   // SRAMECC selection mask for EF_AMDGPU_FEATURE_SRAMECC_* values.
822   //
823   // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V4.
824   EF_AMDGPU_FEATURE_SRAMECC_V4 = 0xc00,
825   // SRAMECC is not supported.
826   EF_AMDGPU_FEATURE_SRAMECC_UNSUPPORTED_V4 = 0x000,
827   // SRAMECC is any/default/unspecified.
828   EF_AMDGPU_FEATURE_SRAMECC_ANY_V4 = 0x400,
829   // SRAMECC is off.
830   EF_AMDGPU_FEATURE_SRAMECC_OFF_V4 = 0x800,
831   // SRAMECC is on.
832   EF_AMDGPU_FEATURE_SRAMECC_ON_V4 = 0xc00,
833 };
834 
835 // ELF Relocation types for AMDGPU
836 enum {
837 #include "ELFRelocs/AMDGPU.def"
838 };
839 
840 // ELF Relocation types for BPF
841 enum {
842 #include "ELFRelocs/BPF.def"
843 };
844 
845 // ELF Relocation types for M68k
846 enum {
847 #include "ELFRelocs/M68k.def"
848 };
849 
850 // MSP430 specific e_flags
851 enum : unsigned {
852   EF_MSP430_MACH_MSP430x11 = 11,
853   EF_MSP430_MACH_MSP430x11x1 = 110,
854   EF_MSP430_MACH_MSP430x12 = 12,
855   EF_MSP430_MACH_MSP430x13 = 13,
856   EF_MSP430_MACH_MSP430x14 = 14,
857   EF_MSP430_MACH_MSP430x15 = 15,
858   EF_MSP430_MACH_MSP430x16 = 16,
859   EF_MSP430_MACH_MSP430x20 = 20,
860   EF_MSP430_MACH_MSP430x22 = 22,
861   EF_MSP430_MACH_MSP430x23 = 23,
862   EF_MSP430_MACH_MSP430x24 = 24,
863   EF_MSP430_MACH_MSP430x26 = 26,
864   EF_MSP430_MACH_MSP430x31 = 31,
865   EF_MSP430_MACH_MSP430x32 = 32,
866   EF_MSP430_MACH_MSP430x33 = 33,
867   EF_MSP430_MACH_MSP430x41 = 41,
868   EF_MSP430_MACH_MSP430x42 = 42,
869   EF_MSP430_MACH_MSP430x43 = 43,
870   EF_MSP430_MACH_MSP430x44 = 44,
871   EF_MSP430_MACH_MSP430X = 45,
872   EF_MSP430_MACH_MSP430x46 = 46,
873   EF_MSP430_MACH_MSP430x47 = 47,
874   EF_MSP430_MACH_MSP430x54 = 54,
875 };
876 
877 // ELF Relocation types for MSP430
878 enum {
879 #include "ELFRelocs/MSP430.def"
880 };
881 
882 // ELF Relocation type for VE.
883 enum {
884 #include "ELFRelocs/VE.def"
885 };
886 
887 // CSKY Specific e_flags
888 enum : unsigned {
889   EF_CSKY_801 = 0xa,
890   EF_CSKY_802 = 0x10,
891   EF_CSKY_803 = 0x9,
892   EF_CSKY_805 = 0x11,
893   EF_CSKY_807 = 0x6,
894   EF_CSKY_810 = 0x8,
895   EF_CSKY_860 = 0xb,
896   EF_CSKY_800 = 0x1f,
897   EF_CSKY_FLOAT = 0x2000,
898   EF_CSKY_DSP = 0x4000,
899   EF_CSKY_ABIV2 = 0x20000000,
900   EF_CSKY_EFV1 = 0x1000000,
901   EF_CSKY_EFV2 = 0x2000000,
902   EF_CSKY_EFV3 = 0x3000000
903 };
904 
905 // ELF Relocation types for CSKY
906 enum {
907 #include "ELFRelocs/CSKY.def"
908 };
909 
910 // LoongArch Specific e_flags
911 enum : unsigned {
912   // Definitions from LoongArch ELF psABI v2.01.
913   // Reference: https://github.com/loongson/LoongArch-Documentation
914   // (commit hash 296de4def055c871809068e0816325a4ac04eb12)
915 
916   // Base ABI Modifiers
917   EF_LOONGARCH_ABI_SOFT_FLOAT    = 0x1,
918   EF_LOONGARCH_ABI_SINGLE_FLOAT  = 0x2,
919   EF_LOONGARCH_ABI_DOUBLE_FLOAT  = 0x3,
920   EF_LOONGARCH_ABI_MODIFIER_MASK = 0x7,
921 
922   // Object file ABI versions
923   EF_LOONGARCH_OBJABI_V0   = 0x0,
924   EF_LOONGARCH_OBJABI_V1   = 0x40,
925   EF_LOONGARCH_OBJABI_MASK = 0xC0,
926 };
927 
928 // ELF Relocation types for LoongArch
929 enum {
930 #include "ELFRelocs/LoongArch.def"
931 };
932 
933 // Xtensa specific e_flags
934 enum : unsigned {
935   // Four-bit Xtensa machine type mask.
936   EF_XTENSA_MACH = 0x0000000f,
937   // Various CPU types.
938   EF_XTENSA_MACH_NONE = 0x00000000, // A base Xtensa implementation
939   EF_XTENSA_XT_INSN = 0x00000100,
940   EF_XTENSA_XT_LIT = 0x00000200,
941 };
942 
943 // ELF Relocation types for Xtensa
944 enum {
945 #include "ELFRelocs/Xtensa.def"
946 };
947 
948 #undef ELF_RELOC
949 
950 // Section header.
951 struct Elf32_Shdr {
952   Elf32_Word sh_name;      // Section name (index into string table)
953   Elf32_Word sh_type;      // Section type (SHT_*)
954   Elf32_Word sh_flags;     // Section flags (SHF_*)
955   Elf32_Addr sh_addr;      // Address where section is to be loaded
956   Elf32_Off sh_offset;     // File offset of section data, in bytes
957   Elf32_Word sh_size;      // Size of section, in bytes
958   Elf32_Word sh_link;      // Section type-specific header table index link
959   Elf32_Word sh_info;      // Section type-specific extra information
960   Elf32_Word sh_addralign; // Section address alignment
961   Elf32_Word sh_entsize;   // Size of records contained within the section
962 };
963 
964 // Section header for ELF64 - same fields as ELF32, different types.
965 struct Elf64_Shdr {
966   Elf64_Word sh_name;
967   Elf64_Word sh_type;
968   Elf64_Xword sh_flags;
969   Elf64_Addr sh_addr;
970   Elf64_Off sh_offset;
971   Elf64_Xword sh_size;
972   Elf64_Word sh_link;
973   Elf64_Word sh_info;
974   Elf64_Xword sh_addralign;
975   Elf64_Xword sh_entsize;
976 };
977 
978 // Special section indices.
979 enum {
980   SHN_UNDEF = 0,          // Undefined, missing, irrelevant, or meaningless
981   SHN_LORESERVE = 0xff00, // Lowest reserved index
982   SHN_LOPROC = 0xff00,    // Lowest processor-specific index
983   SHN_HIPROC = 0xff1f,    // Highest processor-specific index
984   SHN_LOOS = 0xff20,      // Lowest operating system-specific index
985   SHN_HIOS = 0xff3f,      // Highest operating system-specific index
986   SHN_ABS = 0xfff1,       // Symbol has absolute value; does not need relocation
987   SHN_COMMON = 0xfff2,    // FORTRAN COMMON or C external global variables
988   SHN_XINDEX = 0xffff,    // Mark that the index is >= SHN_LORESERVE
989   SHN_HIRESERVE = 0xffff  // Highest reserved index
990 };
991 
992 // Section types.
993 enum : unsigned {
994   SHT_NULL = 0,           // No associated section (inactive entry).
995   SHT_PROGBITS = 1,       // Program-defined contents.
996   SHT_SYMTAB = 2,         // Symbol table.
997   SHT_STRTAB = 3,         // String table.
998   SHT_RELA = 4,           // Relocation entries; explicit addends.
999   SHT_HASH = 5,           // Symbol hash table.
1000   SHT_DYNAMIC = 6,        // Information for dynamic linking.
1001   SHT_NOTE = 7,           // Information about the file.
1002   SHT_NOBITS = 8,         // Data occupies no space in the file.
1003   SHT_REL = 9,            // Relocation entries; no explicit addends.
1004   SHT_SHLIB = 10,         // Reserved.
1005   SHT_DYNSYM = 11,        // Symbol table.
1006   SHT_INIT_ARRAY = 14,    // Pointers to initialization functions.
1007   SHT_FINI_ARRAY = 15,    // Pointers to termination functions.
1008   SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions.
1009   SHT_GROUP = 17,         // Section group.
1010   SHT_SYMTAB_SHNDX = 18,  // Indices for SHN_XINDEX entries.
1011   // Experimental support for SHT_RELR sections. For details, see proposal
1012   // at https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg
1013   SHT_RELR = 19,         // Relocation entries; only offsets.
1014   SHT_LOOS = 0x60000000, // Lowest operating system-specific type.
1015   // Android packed relocation section types.
1016   // https://android.googlesource.com/platform/bionic/+/6f12bfece5dcc01325e0abba56a46b1bcf991c69/tools/relocation_packer/src/elf_file.cc#37
1017   SHT_ANDROID_REL = 0x60000001,
1018   SHT_ANDROID_RELA = 0x60000002,
1019   SHT_LLVM_ODRTAB = 0x6fff4c00,         // LLVM ODR table.
1020   SHT_LLVM_LINKER_OPTIONS = 0x6fff4c01, // LLVM Linker Options.
1021   SHT_LLVM_ADDRSIG = 0x6fff4c03,        // List of address-significant symbols
1022                                         // for safe ICF.
1023   SHT_LLVM_DEPENDENT_LIBRARIES =
1024       0x6fff4c04,                  // LLVM Dependent Library Specifiers.
1025   SHT_LLVM_SYMPART = 0x6fff4c05,   // Symbol partition specification.
1026   SHT_LLVM_PART_EHDR = 0x6fff4c06, // ELF header for loadable partition.
1027   SHT_LLVM_PART_PHDR = 0x6fff4c07, // Phdrs for loadable partition.
1028   SHT_LLVM_BB_ADDR_MAP_V0 =
1029       0x6fff4c08, // LLVM Basic Block Address Map (old version kept for
1030                   // backward-compatibility).
1031   SHT_LLVM_CALL_GRAPH_PROFILE = 0x6fff4c09, // LLVM Call Graph Profile.
1032   SHT_LLVM_BB_ADDR_MAP = 0x6fff4c0a,        // LLVM Basic Block Address Map.
1033   SHT_LLVM_OFFLOADING = 0x6fff4c0b,         // LLVM device offloading data.
1034   // Android's experimental support for SHT_RELR sections.
1035   // https://android.googlesource.com/platform/bionic/+/b7feec74547f84559a1467aca02708ff61346d2a/libc/include/elf.h#512
1036   SHT_ANDROID_RELR = 0x6fffff00,   // Relocation entries; only offsets.
1037   SHT_GNU_ATTRIBUTES = 0x6ffffff5, // Object attributes.
1038   SHT_GNU_HASH = 0x6ffffff6,       // GNU-style hash table.
1039   SHT_GNU_verdef = 0x6ffffffd,     // GNU version definitions.
1040   SHT_GNU_verneed = 0x6ffffffe,    // GNU version references.
1041   SHT_GNU_versym = 0x6fffffff,     // GNU symbol versions table.
1042   SHT_HIOS = 0x6fffffff,           // Highest operating system-specific type.
1043   SHT_LOPROC = 0x70000000,         // Lowest processor arch-specific type.
1044   // Fixme: All this is duplicated in MCSectionELF. Why??
1045   // Exception Index table
1046   SHT_ARM_EXIDX = 0x70000001U,
1047   // BPABI DLL dynamic linking pre-emption map
1048   SHT_ARM_PREEMPTMAP = 0x70000002U,
1049   //  Object file compatibility attributes
1050   SHT_ARM_ATTRIBUTES = 0x70000003U,
1051   SHT_ARM_DEBUGOVERLAY = 0x70000004U,
1052   SHT_ARM_OVERLAYSECTION = 0x70000005U,
1053   // Special aarch64-specific sections for MTE support, as described in:
1054   // https://github.com/ARM-software/abi-aa/blob/main/memtagabielf64/memtagabielf64.rst#7section-types
1055   SHT_AARCH64_MEMTAG_GLOBALS_STATIC = 0x70000007U,
1056   SHT_AARCH64_MEMTAG_GLOBALS_DYNAMIC = 0x70000008U,
1057   SHT_HEX_ORDERED = 0x70000000,   // Link editor is to sort the entries in
1058                                   // this section based on their sizes
1059   SHT_X86_64_UNWIND = 0x70000001, // Unwind information
1060 
1061   SHT_MIPS_REGINFO = 0x70000006,  // Register usage information
1062   SHT_MIPS_OPTIONS = 0x7000000d,  // General options
1063   SHT_MIPS_DWARF = 0x7000001e,    // DWARF debugging section.
1064   SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information.
1065 
1066   SHT_MSP430_ATTRIBUTES = 0x70000003U,
1067 
1068   SHT_RISCV_ATTRIBUTES = 0x70000003U,
1069 
1070   SHT_CSKY_ATTRIBUTES = 0x70000001U,
1071 
1072   SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type.
1073   SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
1074   SHT_HIUSER = 0xffffffff  // Highest type reserved for applications.
1075 };
1076 
1077 // Section flags.
1078 enum : unsigned {
1079   // Section data should be writable during execution.
1080   SHF_WRITE = 0x1,
1081 
1082   // Section occupies memory during program execution.
1083   SHF_ALLOC = 0x2,
1084 
1085   // Section contains executable machine instructions.
1086   SHF_EXECINSTR = 0x4,
1087 
1088   // The data in this section may be merged.
1089   SHF_MERGE = 0x10,
1090 
1091   // The data in this section is null-terminated strings.
1092   SHF_STRINGS = 0x20,
1093 
1094   // A field in this section holds a section header table index.
1095   SHF_INFO_LINK = 0x40U,
1096 
1097   // Adds special ordering requirements for link editors.
1098   SHF_LINK_ORDER = 0x80U,
1099 
1100   // This section requires special OS-specific processing to avoid incorrect
1101   // behavior.
1102   SHF_OS_NONCONFORMING = 0x100U,
1103 
1104   // This section is a member of a section group.
1105   SHF_GROUP = 0x200U,
1106 
1107   // This section holds Thread-Local Storage.
1108   SHF_TLS = 0x400U,
1109 
1110   // Identifies a section containing compressed data.
1111   SHF_COMPRESSED = 0x800U,
1112 
1113   // This section should not be garbage collected by the linker.
1114   SHF_GNU_RETAIN = 0x200000,
1115 
1116   // This section is excluded from the final executable or shared library.
1117   SHF_EXCLUDE = 0x80000000U,
1118 
1119   // Start of target-specific flags.
1120 
1121   SHF_MASKOS = 0x0ff00000,
1122 
1123   // Solaris equivalent of SHF_GNU_RETAIN.
1124   SHF_SUNW_NODISCARD = 0x00100000,
1125 
1126   // Bits indicating processor-specific flags.
1127   SHF_MASKPROC = 0xf0000000,
1128 
1129   /// All sections with the "d" flag are grouped together by the linker to form
1130   /// the data section and the dp register is set to the start of the section by
1131   /// the boot code.
1132   XCORE_SHF_DP_SECTION = 0x10000000,
1133 
1134   /// All sections with the "c" flag are grouped together by the linker to form
1135   /// the constant pool and the cp register is set to the start of the constant
1136   /// pool by the boot code.
1137   XCORE_SHF_CP_SECTION = 0x20000000,
1138 
1139   // If an object file section does not have this flag set, then it may not hold
1140   // more than 2GB and can be freely referred to in objects using smaller code
1141   // models. Otherwise, only objects using larger code models can refer to them.
1142   // For example, a medium code model object can refer to data in a section that
1143   // sets this flag besides being able to refer to data in a section that does
1144   // not set it; likewise, a small code model object can refer only to code in a
1145   // section that does not set this flag.
1146   SHF_X86_64_LARGE = 0x10000000,
1147 
1148   // All sections with the GPREL flag are grouped into a global data area
1149   // for faster accesses
1150   SHF_HEX_GPREL = 0x10000000,
1151 
1152   // Section contains text/data which may be replicated in other sections.
1153   // Linker must retain only one copy.
1154   SHF_MIPS_NODUPES = 0x01000000,
1155 
1156   // Linker must generate implicit hidden weak names.
1157   SHF_MIPS_NAMES = 0x02000000,
1158 
1159   // Section data local to process.
1160   SHF_MIPS_LOCAL = 0x04000000,
1161 
1162   // Do not strip this section.
1163   SHF_MIPS_NOSTRIP = 0x08000000,
1164 
1165   // Section must be part of global data area.
1166   SHF_MIPS_GPREL = 0x10000000,
1167 
1168   // This section should be merged.
1169   SHF_MIPS_MERGE = 0x20000000,
1170 
1171   // Address size to be inferred from section entry size.
1172   SHF_MIPS_ADDR = 0x40000000,
1173 
1174   // Section data is string data by default.
1175   SHF_MIPS_STRING = 0x80000000,
1176 
1177   // Make code section unreadable when in execute-only mode
1178   SHF_ARM_PURECODE = 0x20000000
1179 };
1180 
1181 // Section Group Flags
1182 enum : unsigned {
1183   GRP_COMDAT = 0x1,
1184   GRP_MASKOS = 0x0ff00000,
1185   GRP_MASKPROC = 0xf0000000
1186 };
1187 
1188 // Symbol table entries for ELF32.
1189 struct Elf32_Sym {
1190   Elf32_Word st_name;     // Symbol name (index into string table)
1191   Elf32_Addr st_value;    // Value or address associated with the symbol
1192   Elf32_Word st_size;     // Size of the symbol
1193   unsigned char st_info;  // Symbol's type and binding attributes
1194   unsigned char st_other; // Must be zero; reserved
1195   Elf32_Half st_shndx;    // Which section (header table index) it's defined in
1196 
1197   // These accessors and mutators correspond to the ELF32_ST_BIND,
1198   // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
getBindingElf32_Sym1199   unsigned char getBinding() const { return st_info >> 4; }
getTypeElf32_Sym1200   unsigned char getType() const { return st_info & 0x0f; }
setBindingElf32_Sym1201   void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf32_Sym1202   void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf32_Sym1203   void setBindingAndType(unsigned char b, unsigned char t) {
1204     st_info = (b << 4) + (t & 0x0f);
1205   }
1206 };
1207 
1208 // Symbol table entries for ELF64.
1209 struct Elf64_Sym {
1210   Elf64_Word st_name;     // Symbol name (index into string table)
1211   unsigned char st_info;  // Symbol's type and binding attributes
1212   unsigned char st_other; // Must be zero; reserved
1213   Elf64_Half st_shndx;    // Which section (header tbl index) it's defined in
1214   Elf64_Addr st_value;    // Value or address associated with the symbol
1215   Elf64_Xword st_size;    // Size of the symbol
1216 
1217   // These accessors and mutators are identical to those defined for ELF32
1218   // symbol table entries.
getBindingElf64_Sym1219   unsigned char getBinding() const { return st_info >> 4; }
getTypeElf64_Sym1220   unsigned char getType() const { return st_info & 0x0f; }
setBindingElf64_Sym1221   void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf64_Sym1222   void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf64_Sym1223   void setBindingAndType(unsigned char b, unsigned char t) {
1224     st_info = (b << 4) + (t & 0x0f);
1225   }
1226 };
1227 
1228 // The size (in bytes) of symbol table entries.
1229 enum {
1230   SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
1231   SYMENTRY_SIZE64 = 24  // 64-bit symbol entry size.
1232 };
1233 
1234 // Symbol bindings.
1235 enum {
1236   STB_LOCAL = 0,  // Local symbol, not visible outside obj file containing def
1237   STB_GLOBAL = 1, // Global symbol, visible to all object files being combined
1238   STB_WEAK = 2,   // Weak symbol, like global but lower-precedence
1239   STB_GNU_UNIQUE = 10,
1240   STB_LOOS = 10,   // Lowest operating system-specific binding type
1241   STB_HIOS = 12,   // Highest operating system-specific binding type
1242   STB_LOPROC = 13, // Lowest processor-specific binding type
1243   STB_HIPROC = 15  // Highest processor-specific binding type
1244 };
1245 
1246 // Symbol types.
1247 enum {
1248   STT_NOTYPE = 0,     // Symbol's type is not specified
1249   STT_OBJECT = 1,     // Symbol is a data object (variable, array, etc.)
1250   STT_FUNC = 2,       // Symbol is executable code (function, etc.)
1251   STT_SECTION = 3,    // Symbol refers to a section
1252   STT_FILE = 4,       // Local, absolute symbol that refers to a file
1253   STT_COMMON = 5,     // An uninitialized common block
1254   STT_TLS = 6,        // Thread local data object
1255   STT_GNU_IFUNC = 10, // GNU indirect function
1256   STT_LOOS = 10,      // Lowest operating system-specific symbol type
1257   STT_HIOS = 12,      // Highest operating system-specific symbol type
1258   STT_LOPROC = 13,    // Lowest processor-specific symbol type
1259   STT_HIPROC = 15,    // Highest processor-specific symbol type
1260 
1261   // AMDGPU symbol types
1262   STT_AMDGPU_HSA_KERNEL = 10
1263 };
1264 
1265 enum {
1266   STV_DEFAULT = 0,  // Visibility is specified by binding type
1267   STV_INTERNAL = 1, // Defined by processor supplements
1268   STV_HIDDEN = 2,   // Not visible to other components
1269   STV_PROTECTED = 3 // Visible in other components but not preemptable
1270 };
1271 
1272 // Symbol number.
1273 enum { STN_UNDEF = 0 };
1274 
1275 // Special relocation symbols used in the MIPS64 ELF relocation entries
1276 enum {
1277   RSS_UNDEF = 0, // None
1278   RSS_GP = 1,    // Value of gp
1279   RSS_GP0 = 2,   // Value of gp used to create object being relocated
1280   RSS_LOC = 3    // Address of location being relocated
1281 };
1282 
1283 // Relocation entry, without explicit addend.
1284 struct Elf32_Rel {
1285   Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
1286   Elf32_Word r_info;   // Symbol table index and type of relocation to apply
1287 
1288   // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1289   // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rel1290   Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rel1291   unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
setSymbolElf32_Rel1292   void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rel1293   void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rel1294   void setSymbolAndType(Elf32_Word s, unsigned char t) {
1295     r_info = (s << 8) + t;
1296   }
1297 };
1298 
1299 // Relocation entry with explicit addend.
1300 struct Elf32_Rela {
1301   Elf32_Addr r_offset;  // Location (file byte offset, or program virtual addr)
1302   Elf32_Word r_info;    // Symbol table index and type of relocation to apply
1303   Elf32_Sword r_addend; // Compute value for relocatable field by adding this
1304 
1305   // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1306   // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rela1307   Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rela1308   unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
setSymbolElf32_Rela1309   void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rela1310   void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rela1311   void setSymbolAndType(Elf32_Word s, unsigned char t) {
1312     r_info = (s << 8) + t;
1313   }
1314 };
1315 
1316 // Relocation entry without explicit addend or info (relative relocations only).
1317 typedef Elf32_Word Elf32_Relr; // offset/bitmap for relative relocations
1318 
1319 // Relocation entry, without explicit addend.
1320 struct Elf64_Rel {
1321   Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
1322   Elf64_Xword r_info;  // Symbol table index and type of relocation to apply.
1323 
1324   // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1325   // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rel1326   Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rel1327   Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
setSymbolElf64_Rel1328   void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rel1329   void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rel1330   void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1331     r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
1332   }
1333 };
1334 
1335 // Relocation entry with explicit addend.
1336 struct Elf64_Rela {
1337   Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
1338   Elf64_Xword r_info;  // Symbol table index and type of relocation to apply.
1339   Elf64_Sxword r_addend; // Compute value for relocatable field by adding this.
1340 
1341   // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1342   // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rela1343   Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rela1344   Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
setSymbolElf64_Rela1345   void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rela1346   void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rela1347   void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1348     r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
1349   }
1350 };
1351 
1352 // Relocation entry without explicit addend or info (relative relocations only).
1353 typedef Elf64_Xword Elf64_Relr; // offset/bitmap for relative relocations
1354 
1355 // Program header for ELF32.
1356 struct Elf32_Phdr {
1357   Elf32_Word p_type;   // Type of segment
1358   Elf32_Off p_offset;  // File offset where segment is located, in bytes
1359   Elf32_Addr p_vaddr;  // Virtual address of beginning of segment
1360   Elf32_Addr p_paddr;  // Physical address of beginning of segment (OS-specific)
1361   Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
1362   Elf32_Word p_memsz;  // Num. of bytes in mem image of segment (may be zero)
1363   Elf32_Word p_flags;  // Segment flags
1364   Elf32_Word p_align;  // Segment alignment constraint
1365 };
1366 
1367 // Program header for ELF64.
1368 struct Elf64_Phdr {
1369   Elf64_Word p_type;    // Type of segment
1370   Elf64_Word p_flags;   // Segment flags
1371   Elf64_Off p_offset;   // File offset where segment is located, in bytes
1372   Elf64_Addr p_vaddr;   // Virtual address of beginning of segment
1373   Elf64_Addr p_paddr;   // Physical addr of beginning of segment (OS-specific)
1374   Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero)
1375   Elf64_Xword p_memsz;  // Num. of bytes in mem image of segment (may be zero)
1376   Elf64_Xword p_align;  // Segment alignment constraint
1377 };
1378 
1379 // Segment types.
1380 enum {
1381   PT_NULL = 0,            // Unused segment.
1382   PT_LOAD = 1,            // Loadable segment.
1383   PT_DYNAMIC = 2,         // Dynamic linking information.
1384   PT_INTERP = 3,          // Interpreter pathname.
1385   PT_NOTE = 4,            // Auxiliary information.
1386   PT_SHLIB = 5,           // Reserved.
1387   PT_PHDR = 6,            // The program header table itself.
1388   PT_TLS = 7,             // The thread-local storage template.
1389   PT_LOOS = 0x60000000,   // Lowest operating system-specific pt entry type.
1390   PT_HIOS = 0x6fffffff,   // Highest operating system-specific pt entry type.
1391   PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
1392   PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type.
1393 
1394   // x86-64 program header types.
1395   // These all contain stack unwind tables.
1396   PT_GNU_EH_FRAME = 0x6474e550,
1397   PT_SUNW_EH_FRAME = 0x6474e550,
1398   PT_SUNW_UNWIND = 0x6464e550,
1399 
1400   PT_GNU_STACK = 0x6474e551,    // Indicates stack executability.
1401   PT_GNU_RELRO = 0x6474e552,    // Read-only after relocation.
1402   PT_GNU_PROPERTY = 0x6474e553, // .note.gnu.property notes sections.
1403 
1404   PT_OPENBSD_MUTABLE = 0x65a3dbe5,   // Like bss, but not immutable.
1405   PT_OPENBSD_RANDOMIZE = 0x65a3dbe6, // Fill with random data.
1406   PT_OPENBSD_WXNEEDED = 0x65a3dbe7,  // Program does W^X violations.
1407   PT_OPENBSD_NOBTCFI = 0x65a3dbe8,   // Do not enforce branch target CFI
1408   PT_OPENBSD_SYSCALLS = 0x65a3dbe9,  // System call sites.
1409   PT_OPENBSD_BOOTDATA = 0x65a41be6,  // Section for boot arguments.
1410 
1411   // ARM program header types.
1412   PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info
1413   // These all contain stack unwind tables.
1414   PT_ARM_EXIDX = 0x70000001,
1415   PT_ARM_UNWIND = 0x70000001,
1416   // MTE memory tag segment type
1417   PT_AARCH64_MEMTAG_MTE = 0x70000002,
1418 
1419   // MIPS program header types.
1420   PT_MIPS_REGINFO = 0x70000000,  // Register usage information.
1421   PT_MIPS_RTPROC = 0x70000001,   // Runtime procedure table.
1422   PT_MIPS_OPTIONS = 0x70000002,  // Options segment.
1423   PT_MIPS_ABIFLAGS = 0x70000003, // Abiflags segment.
1424 
1425   // RISCV program header types.
1426   PT_RISCV_ATTRIBUTES = 0x70000003,
1427 };
1428 
1429 // Segment flag bits.
1430 enum : unsigned {
1431   PF_X = 1,                // Execute
1432   PF_W = 2,                // Write
1433   PF_R = 4,                // Read
1434   PF_MASKOS = 0x0ff00000,  // Bits for operating system-specific semantics.
1435   PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics.
1436 };
1437 
1438 // Dynamic table entry for ELF32.
1439 struct Elf32_Dyn {
1440   Elf32_Sword d_tag; // Type of dynamic table entry.
1441   union {
1442     Elf32_Word d_val; // Integer value of entry.
1443     Elf32_Addr d_ptr; // Pointer value of entry.
1444   } d_un;
1445 };
1446 
1447 // Dynamic table entry for ELF64.
1448 struct Elf64_Dyn {
1449   Elf64_Sxword d_tag; // Type of dynamic table entry.
1450   union {
1451     Elf64_Xword d_val; // Integer value of entry.
1452     Elf64_Addr d_ptr;  // Pointer value of entry.
1453   } d_un;
1454 };
1455 
1456 // Dynamic table entry tags.
1457 enum {
1458 #define DYNAMIC_TAG(name, value) DT_##name = value,
1459 #include "DynamicTags.def"
1460 #undef DYNAMIC_TAG
1461 };
1462 
1463 // DT_FLAGS values.
1464 enum {
1465   DF_ORIGIN = 0x01,    // The object may reference $ORIGIN.
1466   DF_SYMBOLIC = 0x02,  // Search the shared lib before searching the exe.
1467   DF_TEXTREL = 0x04,   // Relocations may modify a non-writable segment.
1468   DF_BIND_NOW = 0x08,  // Process all relocations on load.
1469   DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically.
1470 };
1471 
1472 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry.
1473 enum {
1474   DF_1_NOW = 0x00000001,       // Set RTLD_NOW for this object.
1475   DF_1_GLOBAL = 0x00000002,    // Set RTLD_GLOBAL for this object.
1476   DF_1_GROUP = 0x00000004,     // Set RTLD_GROUP for this object.
1477   DF_1_NODELETE = 0x00000008,  // Set RTLD_NODELETE for this object.
1478   DF_1_LOADFLTR = 0x00000010,  // Trigger filtee loading at runtime.
1479   DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object.
1480   DF_1_NOOPEN = 0x00000040,    // Set RTLD_NOOPEN for this object.
1481   DF_1_ORIGIN = 0x00000080,    // $ORIGIN must be handled.
1482   DF_1_DIRECT = 0x00000100,    // Direct binding enabled.
1483   DF_1_TRANS = 0x00000200,
1484   DF_1_INTERPOSE = 0x00000400,  // Object is used to interpose.
1485   DF_1_NODEFLIB = 0x00000800,   // Ignore default lib search path.
1486   DF_1_NODUMP = 0x00001000,     // Object can't be dldump'ed.
1487   DF_1_CONFALT = 0x00002000,    // Configuration alternative created.
1488   DF_1_ENDFILTEE = 0x00004000,  // Filtee terminates filters search.
1489   DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time.
1490   DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time.
1491   DF_1_NODIRECT = 0x00020000,   // Object has no-direct binding.
1492   DF_1_IGNMULDEF = 0x00040000,
1493   DF_1_NOKSYMS = 0x00080000,
1494   DF_1_NOHDR = 0x00100000,
1495   DF_1_EDITED = 0x00200000, // Object is modified after built.
1496   DF_1_NORELOC = 0x00400000,
1497   DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers.
1498   DF_1_GLOBAUDIT = 0x01000000,  // Global auditing required.
1499   DF_1_SINGLETON = 0x02000000,  // Singleton symbols are used.
1500   DF_1_PIE = 0x08000000,        // Object is a position-independent executable.
1501 };
1502 
1503 // DT_MIPS_FLAGS values.
1504 enum {
1505   RHF_NONE = 0x00000000,                   // No flags.
1506   RHF_QUICKSTART = 0x00000001,             // Uses shortcut pointers.
1507   RHF_NOTPOT = 0x00000002,                 // Hash size is not a power of two.
1508   RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH.
1509   RHF_NO_MOVE = 0x00000008,                // DSO address may not be relocated.
1510   RHF_SGI_ONLY = 0x00000010,               // SGI specific features.
1511   RHF_GUARANTEE_INIT = 0x00000020,         // Guarantee that .init will finish
1512                                            // executing before any non-init
1513                                            // code in DSO is called.
1514   RHF_DELTA_C_PLUS_PLUS = 0x00000040,      // Contains Delta C++ code.
1515   RHF_GUARANTEE_START_INIT = 0x00000080,   // Guarantee that .init will start
1516                                            // executing before any non-init
1517                                            // code in DSO is called.
1518   RHF_PIXIE = 0x00000100,                  // Generated by pixie.
1519   RHF_DEFAULT_DELAY_LOAD = 0x00000200,     // Delay-load DSO by default.
1520   RHF_REQUICKSTART = 0x00000400,           // Object may be requickstarted
1521   RHF_REQUICKSTARTED = 0x00000800,         // Object has been requickstarted
1522   RHF_CORD = 0x00001000,                   // Generated by cord.
1523   RHF_NO_UNRES_UNDEF = 0x00002000,         // Object contains no unresolved
1524                                            // undef symbols.
1525   RHF_RLD_ORDER_SAFE = 0x00004000          // Symbol table is in a safe order.
1526 };
1527 
1528 // ElfXX_VerDef structure version (GNU versioning)
1529 enum { VER_DEF_NONE = 0, VER_DEF_CURRENT = 1 };
1530 
1531 // VerDef Flags (ElfXX_VerDef::vd_flags)
1532 enum { VER_FLG_BASE = 0x1, VER_FLG_WEAK = 0x2, VER_FLG_INFO = 0x4 };
1533 
1534 // Special constants for the version table. (SHT_GNU_versym/.gnu.version)
1535 enum {
1536   VER_NDX_LOCAL = 0,       // Unversioned local symbol
1537   VER_NDX_GLOBAL = 1,      // Unversioned global symbol
1538   VERSYM_VERSION = 0x7fff, // Version Index mask
1539   VERSYM_HIDDEN = 0x8000   // Hidden bit (non-default version)
1540 };
1541 
1542 // ElfXX_VerNeed structure version (GNU versioning)
1543 enum { VER_NEED_NONE = 0, VER_NEED_CURRENT = 1 };
1544 
1545 // SHT_NOTE section types.
1546 
1547 // Generic note types.
1548 enum : unsigned {
1549   NT_VERSION = 1,
1550   NT_ARCH = 2,
1551   NT_GNU_BUILD_ATTRIBUTE_OPEN = 0x100,
1552   NT_GNU_BUILD_ATTRIBUTE_FUNC = 0x101,
1553 };
1554 
1555 // Core note types.
1556 enum : unsigned {
1557   NT_PRSTATUS = 1,
1558   NT_FPREGSET = 2,
1559   NT_PRPSINFO = 3,
1560   NT_TASKSTRUCT = 4,
1561   NT_AUXV = 6,
1562   NT_PSTATUS = 10,
1563   NT_FPREGS = 12,
1564   NT_PSINFO = 13,
1565   NT_LWPSTATUS = 16,
1566   NT_LWPSINFO = 17,
1567   NT_WIN32PSTATUS = 18,
1568 
1569   NT_PPC_VMX = 0x100,
1570   NT_PPC_VSX = 0x102,
1571   NT_PPC_TAR = 0x103,
1572   NT_PPC_PPR = 0x104,
1573   NT_PPC_DSCR = 0x105,
1574   NT_PPC_EBB = 0x106,
1575   NT_PPC_PMU = 0x107,
1576   NT_PPC_TM_CGPR = 0x108,
1577   NT_PPC_TM_CFPR = 0x109,
1578   NT_PPC_TM_CVMX = 0x10a,
1579   NT_PPC_TM_CVSX = 0x10b,
1580   NT_PPC_TM_SPR = 0x10c,
1581   NT_PPC_TM_CTAR = 0x10d,
1582   NT_PPC_TM_CPPR = 0x10e,
1583   NT_PPC_TM_CDSCR = 0x10f,
1584 
1585   NT_386_TLS = 0x200,
1586   NT_386_IOPERM = 0x201,
1587   NT_X86_XSTATE = 0x202,
1588 
1589   NT_S390_HIGH_GPRS = 0x300,
1590   NT_S390_TIMER = 0x301,
1591   NT_S390_TODCMP = 0x302,
1592   NT_S390_TODPREG = 0x303,
1593   NT_S390_CTRS = 0x304,
1594   NT_S390_PREFIX = 0x305,
1595   NT_S390_LAST_BREAK = 0x306,
1596   NT_S390_SYSTEM_CALL = 0x307,
1597   NT_S390_TDB = 0x308,
1598   NT_S390_VXRS_LOW = 0x309,
1599   NT_S390_VXRS_HIGH = 0x30a,
1600   NT_S390_GS_CB = 0x30b,
1601   NT_S390_GS_BC = 0x30c,
1602 
1603   NT_ARM_VFP = 0x400,
1604   NT_ARM_TLS = 0x401,
1605   NT_ARM_HW_BREAK = 0x402,
1606   NT_ARM_HW_WATCH = 0x403,
1607   NT_ARM_SVE = 0x405,
1608   NT_ARM_PAC_MASK = 0x406,
1609 
1610   NT_FILE = 0x46494c45,
1611   NT_PRXFPREG = 0x46e62b7f,
1612   NT_SIGINFO = 0x53494749,
1613 };
1614 
1615 // LLVM-specific notes.
1616 enum {
1617   NT_LLVM_HWASAN_GLOBALS = 3,
1618 };
1619 
1620 // GNU note types.
1621 enum {
1622   NT_GNU_ABI_TAG = 1,
1623   NT_GNU_HWCAP = 2,
1624   NT_GNU_BUILD_ID = 3,
1625   NT_GNU_GOLD_VERSION = 4,
1626   NT_GNU_PROPERTY_TYPE_0 = 5,
1627   FDO_PACKAGING_METADATA = 0xcafe1a7e,
1628 };
1629 
1630 // Android note types.
1631 enum {
1632   NT_ANDROID_TYPE_IDENT = 1,
1633   NT_ANDROID_TYPE_KUSER = 3,
1634   NT_ANDROID_TYPE_MEMTAG = 4,
1635 };
1636 
1637 // Memory tagging values used in NT_ANDROID_TYPE_MEMTAG notes.
1638 enum {
1639   // Enumeration to determine the tagging mode. In Android-land, 'SYNC' means
1640   // running all threads in MTE Synchronous mode, and 'ASYNC' means to use the
1641   // kernels auto-upgrade feature to allow for either MTE Asynchronous,
1642   // Asymmetric, or Synchronous mode. This allows silicon vendors to specify, on
1643   // a per-cpu basis what 'ASYNC' should mean. Generally, the expectation is
1644   // "pick the most precise mode that's very fast".
1645   NT_MEMTAG_LEVEL_NONE = 0,
1646   NT_MEMTAG_LEVEL_ASYNC = 1,
1647   NT_MEMTAG_LEVEL_SYNC = 2,
1648   NT_MEMTAG_LEVEL_MASK = 3,
1649   // Bits indicating whether the loader should prepare for MTE to be enabled on
1650   // the heap and/or stack.
1651   NT_MEMTAG_HEAP = 4,
1652   NT_MEMTAG_STACK = 8,
1653 };
1654 
1655 // Property types used in GNU_PROPERTY_TYPE_0 notes.
1656 enum : unsigned {
1657   GNU_PROPERTY_STACK_SIZE = 1,
1658   GNU_PROPERTY_NO_COPY_ON_PROTECTED = 2,
1659   GNU_PROPERTY_AARCH64_FEATURE_1_AND = 0xc0000000,
1660   GNU_PROPERTY_X86_FEATURE_1_AND = 0xc0000002,
1661 
1662   GNU_PROPERTY_X86_UINT32_OR_LO = 0xc0008000,
1663   GNU_PROPERTY_X86_FEATURE_2_NEEDED = GNU_PROPERTY_X86_UINT32_OR_LO + 1,
1664   GNU_PROPERTY_X86_ISA_1_NEEDED = GNU_PROPERTY_X86_UINT32_OR_LO + 2,
1665 
1666   GNU_PROPERTY_X86_UINT32_OR_AND_LO = 0xc0010000,
1667   GNU_PROPERTY_X86_FEATURE_2_USED = GNU_PROPERTY_X86_UINT32_OR_AND_LO + 1,
1668   GNU_PROPERTY_X86_ISA_1_USED = GNU_PROPERTY_X86_UINT32_OR_AND_LO + 2,
1669 };
1670 
1671 // aarch64 processor feature bits.
1672 enum : unsigned {
1673   GNU_PROPERTY_AARCH64_FEATURE_1_BTI = 1 << 0,
1674   GNU_PROPERTY_AARCH64_FEATURE_1_PAC = 1 << 1,
1675 };
1676 
1677 // x86 processor feature bits.
1678 enum : unsigned {
1679   GNU_PROPERTY_X86_FEATURE_1_IBT = 1 << 0,
1680   GNU_PROPERTY_X86_FEATURE_1_SHSTK = 1 << 1,
1681 
1682   GNU_PROPERTY_X86_FEATURE_2_X86 = 1 << 0,
1683   GNU_PROPERTY_X86_FEATURE_2_X87 = 1 << 1,
1684   GNU_PROPERTY_X86_FEATURE_2_MMX = 1 << 2,
1685   GNU_PROPERTY_X86_FEATURE_2_XMM = 1 << 3,
1686   GNU_PROPERTY_X86_FEATURE_2_YMM = 1 << 4,
1687   GNU_PROPERTY_X86_FEATURE_2_ZMM = 1 << 5,
1688   GNU_PROPERTY_X86_FEATURE_2_FXSR = 1 << 6,
1689   GNU_PROPERTY_X86_FEATURE_2_XSAVE = 1 << 7,
1690   GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT = 1 << 8,
1691   GNU_PROPERTY_X86_FEATURE_2_XSAVEC = 1 << 9,
1692 
1693   GNU_PROPERTY_X86_ISA_1_BASELINE = 1 << 0,
1694   GNU_PROPERTY_X86_ISA_1_V2 = 1 << 1,
1695   GNU_PROPERTY_X86_ISA_1_V3 = 1 << 2,
1696   GNU_PROPERTY_X86_ISA_1_V4 = 1 << 3,
1697 };
1698 
1699 // FreeBSD note types.
1700 enum {
1701   NT_FREEBSD_ABI_TAG = 1,
1702   NT_FREEBSD_NOINIT_TAG = 2,
1703   NT_FREEBSD_ARCH_TAG = 3,
1704   NT_FREEBSD_FEATURE_CTL = 4,
1705 };
1706 
1707 // NT_FREEBSD_FEATURE_CTL values (see FreeBSD's sys/sys/elf_common.h).
1708 enum {
1709   NT_FREEBSD_FCTL_ASLR_DISABLE = 0x00000001,
1710   NT_FREEBSD_FCTL_PROTMAX_DISABLE = 0x00000002,
1711   NT_FREEBSD_FCTL_STKGAP_DISABLE = 0x00000004,
1712   NT_FREEBSD_FCTL_WXNEEDED = 0x00000008,
1713   NT_FREEBSD_FCTL_LA48 = 0x00000010,
1714   NT_FREEBSD_FCTL_ASG_DISABLE = 0x00000020,
1715 };
1716 
1717 // FreeBSD core note types.
1718 enum {
1719   NT_FREEBSD_THRMISC = 7,
1720   NT_FREEBSD_PROCSTAT_PROC = 8,
1721   NT_FREEBSD_PROCSTAT_FILES = 9,
1722   NT_FREEBSD_PROCSTAT_VMMAP = 10,
1723   NT_FREEBSD_PROCSTAT_GROUPS = 11,
1724   NT_FREEBSD_PROCSTAT_UMASK = 12,
1725   NT_FREEBSD_PROCSTAT_RLIMIT = 13,
1726   NT_FREEBSD_PROCSTAT_OSREL = 14,
1727   NT_FREEBSD_PROCSTAT_PSSTRINGS = 15,
1728   NT_FREEBSD_PROCSTAT_AUXV = 16,
1729 };
1730 
1731 // NetBSD core note types.
1732 enum {
1733   NT_NETBSDCORE_PROCINFO = 1,
1734   NT_NETBSDCORE_AUXV = 2,
1735   NT_NETBSDCORE_LWPSTATUS = 24,
1736 };
1737 
1738 // OpenBSD core note types.
1739 enum {
1740   NT_OPENBSD_PROCINFO = 10,
1741   NT_OPENBSD_AUXV = 11,
1742   NT_OPENBSD_REGS = 20,
1743   NT_OPENBSD_FPREGS = 21,
1744   NT_OPENBSD_XFPREGS = 22,
1745   NT_OPENBSD_WCOOKIE = 23,
1746 };
1747 
1748 // AMDGPU-specific section indices.
1749 enum {
1750   SHN_AMDGPU_LDS = 0xff00, // Variable in LDS; symbol encoded like SHN_COMMON
1751 };
1752 
1753 // AMD vendor specific notes. (Code Object V2)
1754 enum {
1755   NT_AMD_HSA_CODE_OBJECT_VERSION = 1,
1756   NT_AMD_HSA_HSAIL = 2,
1757   NT_AMD_HSA_ISA_VERSION = 3,
1758   // Note types with values between 4 and 9 (inclusive) are reserved.
1759   NT_AMD_HSA_METADATA = 10,
1760   NT_AMD_HSA_ISA_NAME = 11,
1761   NT_AMD_PAL_METADATA = 12
1762 };
1763 
1764 // AMDGPU vendor specific notes. (Code Object V3)
1765 enum {
1766   // Note types with values between 0 and 31 (inclusive) are reserved.
1767   NT_AMDGPU_METADATA = 32
1768 };
1769 
1770 // LLVMOMPOFFLOAD specific notes.
1771 enum : unsigned {
1772   NT_LLVM_OPENMP_OFFLOAD_VERSION = 1,
1773   NT_LLVM_OPENMP_OFFLOAD_PRODUCER = 2,
1774   NT_LLVM_OPENMP_OFFLOAD_PRODUCER_VERSION = 3
1775 };
1776 
1777 enum {
1778   GNU_ABI_TAG_LINUX = 0,
1779   GNU_ABI_TAG_HURD = 1,
1780   GNU_ABI_TAG_SOLARIS = 2,
1781   GNU_ABI_TAG_FREEBSD = 3,
1782   GNU_ABI_TAG_NETBSD = 4,
1783   GNU_ABI_TAG_SYLLABLE = 5,
1784   GNU_ABI_TAG_NACL = 6,
1785 };
1786 
1787 constexpr const char *ELF_NOTE_GNU = "GNU";
1788 
1789 // Android packed relocation group flags.
1790 enum {
1791   RELOCATION_GROUPED_BY_INFO_FLAG = 1,
1792   RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG = 2,
1793   RELOCATION_GROUPED_BY_ADDEND_FLAG = 4,
1794   RELOCATION_GROUP_HAS_ADDEND_FLAG = 8,
1795 };
1796 
1797 // Compressed section header for ELF32.
1798 struct Elf32_Chdr {
1799   Elf32_Word ch_type;
1800   Elf32_Word ch_size;
1801   Elf32_Word ch_addralign;
1802 };
1803 
1804 // Compressed section header for ELF64.
1805 struct Elf64_Chdr {
1806   Elf64_Word ch_type;
1807   Elf64_Word ch_reserved;
1808   Elf64_Xword ch_size;
1809   Elf64_Xword ch_addralign;
1810 };
1811 
1812 // Note header for ELF32.
1813 struct Elf32_Nhdr {
1814   Elf32_Word n_namesz;
1815   Elf32_Word n_descsz;
1816   Elf32_Word n_type;
1817 };
1818 
1819 // Note header for ELF64.
1820 struct Elf64_Nhdr {
1821   Elf64_Word n_namesz;
1822   Elf64_Word n_descsz;
1823   Elf64_Word n_type;
1824 };
1825 
1826 // Legal values for ch_type field of compressed section header.
1827 enum {
1828   ELFCOMPRESS_ZLIB = 1,            // ZLIB/DEFLATE algorithm.
1829   ELFCOMPRESS_ZSTD = 2,            // Zstandard algorithm
1830   ELFCOMPRESS_LOOS = 0x60000000,   // Start of OS-specific.
1831   ELFCOMPRESS_HIOS = 0x6fffffff,   // End of OS-specific.
1832   ELFCOMPRESS_LOPROC = 0x70000000, // Start of processor-specific.
1833   ELFCOMPRESS_HIPROC = 0x7fffffff  // End of processor-specific.
1834 };
1835 
1836 /// Convert an architecture name into ELF's e_machine value.
1837 uint16_t convertArchNameToEMachine(StringRef Arch);
1838 
1839 /// Convert an ELF's e_machine value into an architecture name.
1840 StringRef convertEMachineToArchName(uint16_t EMachine);
1841 
1842 } // end namespace ELF
1843 } // end namespace llvm
1844 
1845 #endif // LLVM_BINARYFORMAT_ELF_H
1846