1 //===- llvm/BinaryFormat/ELF.h - ELF constants and structures ---*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This header contains common, non-processor-specific data structures and
11 // constants for the ELF file format.
12 //
13 // The details of the ELF32 bits in this file are largely based on the Tool
14 // Interface Standard (TIS) Executable and Linking Format (ELF) Specification
15 // Version 1.2, May 1995. The ELF64 stuff is based on ELF-64 Object File Format
16 // Version 1.5, Draft 2, May 1998 as well as OpenBSD header files.
17 //
18 //===----------------------------------------------------------------------===//
19
20 #ifndef LLVM_BINARYFORMAT_ELF_H
21 #define LLVM_BINARYFORMAT_ELF_H
22
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 enum {
113 ET_NONE = 0, // No file type
114 ET_REL = 1, // Relocatable file
115 ET_EXEC = 2, // Executable file
116 ET_DYN = 3, // Shared object file
117 ET_CORE = 4, // Core file
118 ET_LOPROC = 0xff00, // Beginning of processor-specific codes
119 ET_HIPROC = 0xffff // Processor-specific
120 };
121
122 // Versioning
123 enum { EV_NONE = 0, EV_CURRENT = 1 };
124
125 // Machine architectures
126 // See current registered ELF machine architectures at:
127 // http://www.uxsglobal.com/developers/gabi/latest/ch4.eheader.html
128 enum {
129 EM_NONE = 0, // No machine
130 EM_M32 = 1, // AT&T WE 32100
131 EM_SPARC = 2, // SPARC
132 EM_386 = 3, // Intel 386
133 EM_68K = 4, // Motorola 68000
134 EM_88K = 5, // Motorola 88000
135 EM_IAMCU = 6, // Intel MCU
136 EM_860 = 7, // Intel 80860
137 EM_MIPS = 8, // MIPS R3000
138 EM_S370 = 9, // IBM System/370
139 EM_MIPS_RS3_LE = 10, // MIPS RS3000 Little-endian
140 EM_PARISC = 15, // Hewlett-Packard PA-RISC
141 EM_VPP500 = 17, // Fujitsu VPP500
142 EM_SPARC32PLUS = 18, // Enhanced instruction set SPARC
143 EM_960 = 19, // Intel 80960
144 EM_PPC = 20, // PowerPC
145 EM_PPC64 = 21, // PowerPC64
146 EM_S390 = 22, // IBM System/390
147 EM_SPU = 23, // IBM SPU/SPC
148 EM_V800 = 36, // NEC V800
149 EM_FR20 = 37, // Fujitsu FR20
150 EM_RH32 = 38, // TRW RH-32
151 EM_RCE = 39, // Motorola RCE
152 EM_ARM = 40, // ARM
153 EM_ALPHA = 41, // DEC Alpha
154 EM_SH = 42, // Hitachi SH
155 EM_SPARCV9 = 43, // SPARC V9
156 EM_TRICORE = 44, // Siemens TriCore
157 EM_ARC = 45, // Argonaut RISC Core
158 EM_H8_300 = 46, // Hitachi H8/300
159 EM_H8_300H = 47, // Hitachi H8/300H
160 EM_H8S = 48, // Hitachi H8S
161 EM_H8_500 = 49, // Hitachi H8/500
162 EM_IA_64 = 50, // Intel IA-64 processor architecture
163 EM_MIPS_X = 51, // Stanford MIPS-X
164 EM_COLDFIRE = 52, // Motorola ColdFire
165 EM_68HC12 = 53, // Motorola M68HC12
166 EM_MMA = 54, // Fujitsu MMA Multimedia Accelerator
167 EM_PCP = 55, // Siemens PCP
168 EM_NCPU = 56, // Sony nCPU embedded RISC processor
169 EM_NDR1 = 57, // Denso NDR1 microprocessor
170 EM_STARCORE = 58, // Motorola Star*Core processor
171 EM_ME16 = 59, // Toyota ME16 processor
172 EM_ST100 = 60, // STMicroelectronics ST100 processor
173 EM_TINYJ = 61, // Advanced Logic Corp. TinyJ embedded processor family
174 EM_X86_64 = 62, // AMD x86-64 architecture
175 EM_PDSP = 63, // Sony DSP Processor
176 EM_PDP10 = 64, // Digital Equipment Corp. PDP-10
177 EM_PDP11 = 65, // Digital Equipment Corp. PDP-11
178 EM_FX66 = 66, // Siemens FX66 microcontroller
179 EM_ST9PLUS = 67, // STMicroelectronics ST9+ 8/16 bit microcontroller
180 EM_ST7 = 68, // STMicroelectronics ST7 8-bit microcontroller
181 EM_68HC16 = 69, // Motorola MC68HC16 Microcontroller
182 EM_68HC11 = 70, // Motorola MC68HC11 Microcontroller
183 EM_68HC08 = 71, // Motorola MC68HC08 Microcontroller
184 EM_68HC05 = 72, // Motorola MC68HC05 Microcontroller
185 EM_SVX = 73, // Silicon Graphics SVx
186 EM_ST19 = 74, // STMicroelectronics ST19 8-bit microcontroller
187 EM_VAX = 75, // Digital VAX
188 EM_CRIS = 76, // Axis Communications 32-bit embedded processor
189 EM_JAVELIN = 77, // Infineon Technologies 32-bit embedded processor
190 EM_FIREPATH = 78, // Element 14 64-bit DSP Processor
191 EM_ZSP = 79, // LSI Logic 16-bit DSP Processor
192 EM_MMIX = 80, // Donald Knuth's educational 64-bit processor
193 EM_HUANY = 81, // Harvard University machine-independent object files
194 EM_PRISM = 82, // SiTera Prism
195 EM_AVR = 83, // Atmel AVR 8-bit microcontroller
196 EM_FR30 = 84, // Fujitsu FR30
197 EM_D10V = 85, // Mitsubishi D10V
198 EM_D30V = 86, // Mitsubishi D30V
199 EM_V850 = 87, // NEC v850
200 EM_M32R = 88, // Mitsubishi M32R
201 EM_MN10300 = 89, // Matsushita MN10300
202 EM_MN10200 = 90, // Matsushita MN10200
203 EM_PJ = 91, // picoJava
204 EM_OPENRISC = 92, // OpenRISC 32-bit embedded processor
205 EM_ARC_COMPACT = 93, // ARC International ARCompact processor (old
206 // spelling/synonym: EM_ARC_A5)
207 EM_XTENSA = 94, // Tensilica Xtensa Architecture
208 EM_VIDEOCORE = 95, // Alphamosaic VideoCore processor
209 EM_TMM_GPP = 96, // Thompson Multimedia General Purpose Processor
210 EM_NS32K = 97, // National Semiconductor 32000 series
211 EM_TPC = 98, // Tenor Network TPC processor
212 EM_SNP1K = 99, // Trebia SNP 1000 processor
213 EM_ST200 = 100, // STMicroelectronics (www.st.com) ST200
214 EM_IP2K = 101, // Ubicom IP2xxx microcontroller family
215 EM_MAX = 102, // MAX Processor
216 EM_CR = 103, // National Semiconductor CompactRISC microprocessor
217 EM_F2MC16 = 104, // Fujitsu F2MC16
218 EM_MSP430 = 105, // Texas Instruments embedded microcontroller msp430
219 EM_BLACKFIN = 106, // Analog Devices Blackfin (DSP) processor
220 EM_SE_C33 = 107, // S1C33 Family of Seiko Epson processors
221 EM_SEP = 108, // Sharp embedded microprocessor
222 EM_ARCA = 109, // Arca RISC Microprocessor
223 EM_UNICORE = 110, // Microprocessor series from PKU-Unity Ltd. and MPRC
224 // of Peking University
225 EM_EXCESS = 111, // eXcess: 16/32/64-bit configurable embedded CPU
226 EM_DXP = 112, // Icera Semiconductor Inc. Deep Execution Processor
227 EM_ALTERA_NIOS2 = 113, // Altera Nios II soft-core processor
228 EM_CRX = 114, // National Semiconductor CompactRISC CRX
229 EM_XGATE = 115, // Motorola XGATE embedded processor
230 EM_C166 = 116, // Infineon C16x/XC16x processor
231 EM_M16C = 117, // Renesas M16C series microprocessors
232 EM_DSPIC30F = 118, // Microchip Technology dsPIC30F Digital Signal
233 // Controller
234 EM_CE = 119, // Freescale Communication Engine RISC core
235 EM_M32C = 120, // Renesas M32C series microprocessors
236 EM_TSK3000 = 131, // Altium TSK3000 core
237 EM_RS08 = 132, // Freescale RS08 embedded processor
238 EM_SHARC = 133, // Analog Devices SHARC family of 32-bit DSP
239 // processors
240 EM_ECOG2 = 134, // Cyan Technology eCOG2 microprocessor
241 EM_SCORE7 = 135, // Sunplus S+core7 RISC processor
242 EM_DSP24 = 136, // New Japan Radio (NJR) 24-bit DSP Processor
243 EM_VIDEOCORE3 = 137, // Broadcom VideoCore III processor
244 EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture
245 EM_SE_C17 = 139, // Seiko Epson C17 family
246 EM_TI_C6000 = 140, // The Texas Instruments TMS320C6000 DSP family
247 EM_TI_C2000 = 141, // The Texas Instruments TMS320C2000 DSP family
248 EM_TI_C5500 = 142, // The Texas Instruments TMS320C55x DSP family
249 EM_MMDSP_PLUS = 160, // STMicroelectronics 64bit VLIW Data Signal Processor
250 EM_CYPRESS_M8C = 161, // Cypress M8C microprocessor
251 EM_R32C = 162, // Renesas R32C series microprocessors
252 EM_TRIMEDIA = 163, // NXP Semiconductors TriMedia architecture family
253 EM_HEXAGON = 164, // Qualcomm Hexagon processor
254 EM_8051 = 165, // Intel 8051 and variants
255 EM_STXP7X = 166, // STMicroelectronics STxP7x family of configurable
256 // and extensible RISC processors
257 EM_NDS32 = 167, // Andes Technology compact code size embedded RISC
258 // processor family
259 EM_ECOG1 = 168, // Cyan Technology eCOG1X family
260 EM_ECOG1X = 168, // Cyan Technology eCOG1X family
261 EM_MAXQ30 = 169, // Dallas Semiconductor MAXQ30 Core Micro-controllers
262 EM_XIMO16 = 170, // New Japan Radio (NJR) 16-bit DSP Processor
263 EM_MANIK = 171, // M2000 Reconfigurable RISC Microprocessor
264 EM_CRAYNV2 = 172, // Cray Inc. NV2 vector architecture
265 EM_RX = 173, // Renesas RX family
266 EM_METAG = 174, // Imagination Technologies META processor
267 // architecture
268 EM_MCST_ELBRUS = 175, // MCST Elbrus general purpose hardware architecture
269 EM_ECOG16 = 176, // Cyan Technology eCOG16 family
270 EM_CR16 = 177, // National Semiconductor CompactRISC CR16 16-bit
271 // microprocessor
272 EM_ETPU = 178, // Freescale Extended Time Processing Unit
273 EM_SLE9X = 179, // Infineon Technologies SLE9X core
274 EM_L10M = 180, // Intel L10M
275 EM_K10M = 181, // Intel K10M
276 EM_AARCH64 = 183, // ARM AArch64
277 EM_AVR32 = 185, // Atmel Corporation 32-bit microprocessor family
278 EM_STM8 = 186, // STMicroeletronics STM8 8-bit microcontroller
279 EM_TILE64 = 187, // Tilera TILE64 multicore architecture family
280 EM_TILEPRO = 188, // Tilera TILEPro multicore architecture family
281 EM_CUDA = 190, // NVIDIA CUDA architecture
282 EM_TILEGX = 191, // Tilera TILE-Gx multicore architecture family
283 EM_CLOUDSHIELD = 192, // CloudShield architecture family
284 EM_COREA_1ST = 193, // KIPO-KAIST Core-A 1st generation processor family
285 EM_COREA_2ND = 194, // KIPO-KAIST Core-A 2nd generation processor family
286 EM_ARC_COMPACT2 = 195, // Synopsys ARCompact V2
287 EM_OPEN8 = 196, // Open8 8-bit RISC soft processor core
288 EM_RL78 = 197, // Renesas RL78 family
289 EM_VIDEOCORE5 = 198, // Broadcom VideoCore V processor
290 EM_78KOR = 199, // Renesas 78KOR family
291 EM_56800EX = 200, // Freescale 56800EX Digital Signal Controller (DSC)
292 EM_BA1 = 201, // Beyond BA1 CPU architecture
293 EM_BA2 = 202, // Beyond BA2 CPU architecture
294 EM_XCORE = 203, // XMOS xCORE processor family
295 EM_MCHP_PIC = 204, // Microchip 8-bit PIC(r) family
296 EM_INTEL205 = 205, // Reserved by Intel
297 EM_INTEL206 = 206, // Reserved by Intel
298 EM_INTEL207 = 207, // Reserved by Intel
299 EM_INTEL208 = 208, // Reserved by Intel
300 EM_INTEL209 = 209, // Reserved by Intel
301 EM_KM32 = 210, // KM211 KM32 32-bit processor
302 EM_KMX32 = 211, // KM211 KMX32 32-bit processor
303 EM_KMX16 = 212, // KM211 KMX16 16-bit processor
304 EM_KMX8 = 213, // KM211 KMX8 8-bit processor
305 EM_KVARC = 214, // KM211 KVARC processor
306 EM_CDP = 215, // Paneve CDP architecture family
307 EM_COGE = 216, // Cognitive Smart Memory Processor
308 EM_COOL = 217, // iCelero CoolEngine
309 EM_NORC = 218, // Nanoradio Optimized RISC
310 EM_CSR_KALIMBA = 219, // CSR Kalimba architecture family
311 EM_AMDGPU = 224, // AMD GPU architecture
312 EM_RISCV = 243, // RISC-V
313 EM_LANAI = 244, // Lanai 32-bit processor
314 EM_BPF = 247, // Linux kernel bpf virtual machine
315 };
316
317 // Object file classes.
318 enum {
319 ELFCLASSNONE = 0,
320 ELFCLASS32 = 1, // 32-bit object file
321 ELFCLASS64 = 2 // 64-bit object file
322 };
323
324 // Object file byte orderings.
325 enum {
326 ELFDATANONE = 0, // Invalid data encoding.
327 ELFDATA2LSB = 1, // Little-endian object file
328 ELFDATA2MSB = 2 // Big-endian object file
329 };
330
331 // OS ABI identification.
332 enum {
333 ELFOSABI_NONE = 0, // UNIX System V ABI
334 ELFOSABI_HPUX = 1, // HP-UX operating system
335 ELFOSABI_NETBSD = 2, // NetBSD
336 ELFOSABI_GNU = 3, // GNU/Linux
337 ELFOSABI_LINUX = 3, // Historical alias for ELFOSABI_GNU.
338 ELFOSABI_HURD = 4, // GNU/Hurd
339 ELFOSABI_SOLARIS = 6, // Solaris
340 ELFOSABI_AIX = 7, // AIX
341 ELFOSABI_IRIX = 8, // IRIX
342 ELFOSABI_FREEBSD = 9, // FreeBSD
343 ELFOSABI_TRU64 = 10, // TRU64 UNIX
344 ELFOSABI_MODESTO = 11, // Novell Modesto
345 ELFOSABI_OPENBSD = 12, // OpenBSD
346 ELFOSABI_OPENVMS = 13, // OpenVMS
347 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel
348 ELFOSABI_AROS = 15, // AROS
349 ELFOSABI_FENIXOS = 16, // FenixOS
350 ELFOSABI_CLOUDABI = 17, // Nuxi CloudABI
351 ELFOSABI_FIRST_ARCH = 64, // First architecture-specific OS ABI
352 ELFOSABI_AMDGPU_HSA = 64, // AMD HSA runtime
353 ELFOSABI_AMDGPU_PAL = 65, // AMD PAL runtime
354 ELFOSABI_AMDGPU_MESA3D = 66, // AMD GCN GPUs (GFX6+) for MESA runtime
355 ELFOSABI_ARM = 97, // ARM
356 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
357 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000
358 ELFOSABI_STANDALONE = 255, // Standalone (embedded) application
359 ELFOSABI_LAST_ARCH = 255 // Last Architecture-specific OS ABI
360 };
361
362 #define ELF_RELOC(name, value) name = value,
363
364 // X86_64 relocations.
365 enum {
366 #include "ELFRelocs/x86_64.def"
367 };
368
369 // i386 relocations.
370 enum {
371 #include "ELFRelocs/i386.def"
372 };
373
374 // ELF Relocation types for PPC32
375 enum {
376 #include "ELFRelocs/PowerPC.def"
377 };
378
379 // Specific e_flags for PPC64
380 enum {
381 // e_flags bits specifying ABI:
382 // 1 for original ABI using function descriptors,
383 // 2 for revised ABI without function descriptors,
384 // 0 for unspecified or not using any features affected by the differences.
385 EF_PPC64_ABI = 3
386 };
387
388 // Special values for the st_other field in the symbol table entry for PPC64.
389 enum {
390 STO_PPC64_LOCAL_BIT = 5,
391 STO_PPC64_LOCAL_MASK = (7 << STO_PPC64_LOCAL_BIT)
392 };
decodePPC64LocalEntryOffset(unsigned Other)393 static inline int64_t decodePPC64LocalEntryOffset(unsigned Other) {
394 unsigned Val = (Other & STO_PPC64_LOCAL_MASK) >> STO_PPC64_LOCAL_BIT;
395 return ((1 << Val) >> 2) << 2;
396 }
encodePPC64LocalEntryOffset(int64_t Offset)397 static inline unsigned encodePPC64LocalEntryOffset(int64_t Offset) {
398 unsigned Val =
399 (Offset >= 4 * 4 ? (Offset >= 8 * 4 ? (Offset >= 16 * 4 ? 6 : 5) : 4)
400 : (Offset >= 2 * 4 ? 3 : (Offset >= 1 * 4 ? 2 : 0)));
401 return Val << STO_PPC64_LOCAL_BIT;
402 }
403
404 // ELF Relocation types for PPC64
405 enum {
406 #include "ELFRelocs/PowerPC64.def"
407 };
408
409 // ELF Relocation types for AArch64
410 enum {
411 #include "ELFRelocs/AArch64.def"
412 };
413
414 // ARM Specific e_flags
415 enum : unsigned {
416 EF_ARM_SOFT_FLOAT = 0x00000200U, // Legacy pre EABI_VER5
417 EF_ARM_ABI_FLOAT_SOFT = 0x00000200U, // EABI_VER5
418 EF_ARM_VFP_FLOAT = 0x00000400U, // Legacy pre EABI_VER5
419 EF_ARM_ABI_FLOAT_HARD = 0x00000400U, // EABI_VER5
420 EF_ARM_EABI_UNKNOWN = 0x00000000U,
421 EF_ARM_EABI_VER1 = 0x01000000U,
422 EF_ARM_EABI_VER2 = 0x02000000U,
423 EF_ARM_EABI_VER3 = 0x03000000U,
424 EF_ARM_EABI_VER4 = 0x04000000U,
425 EF_ARM_EABI_VER5 = 0x05000000U,
426 EF_ARM_EABIMASK = 0xFF000000U
427 };
428
429 // ELF Relocation types for ARM
430 enum {
431 #include "ELFRelocs/ARM.def"
432 };
433
434 // ARC Specific e_flags
435 enum : unsigned {
436 EF_ARC_MACH_MSK = 0x000000ff,
437 EF_ARC_OSABI_MSK = 0x00000f00,
438 E_ARC_MACH_ARC600 = 0x00000002,
439 E_ARC_MACH_ARC601 = 0x00000004,
440 E_ARC_MACH_ARC700 = 0x00000003,
441 EF_ARC_CPU_ARCV2EM = 0x00000005,
442 EF_ARC_CPU_ARCV2HS = 0x00000006,
443 E_ARC_OSABI_ORIG = 0x00000000,
444 E_ARC_OSABI_V2 = 0x00000200,
445 E_ARC_OSABI_V3 = 0x00000300,
446 E_ARC_OSABI_V4 = 0x00000400,
447 EF_ARC_PIC = 0x00000100
448 };
449
450 // ELF Relocation types for ARC
451 enum {
452 #include "ELFRelocs/ARC.def"
453 };
454
455 // AVR specific e_flags
456 enum : unsigned {
457 EF_AVR_ARCH_AVR1 = 1,
458 EF_AVR_ARCH_AVR2 = 2,
459 EF_AVR_ARCH_AVR25 = 25,
460 EF_AVR_ARCH_AVR3 = 3,
461 EF_AVR_ARCH_AVR31 = 31,
462 EF_AVR_ARCH_AVR35 = 35,
463 EF_AVR_ARCH_AVR4 = 4,
464 EF_AVR_ARCH_AVR5 = 5,
465 EF_AVR_ARCH_AVR51 = 51,
466 EF_AVR_ARCH_AVR6 = 6,
467 EF_AVR_ARCH_AVRTINY = 100,
468 EF_AVR_ARCH_XMEGA1 = 101,
469 EF_AVR_ARCH_XMEGA2 = 102,
470 EF_AVR_ARCH_XMEGA3 = 103,
471 EF_AVR_ARCH_XMEGA4 = 104,
472 EF_AVR_ARCH_XMEGA5 = 105,
473 EF_AVR_ARCH_XMEGA6 = 106,
474 EF_AVR_ARCH_XMEGA7 = 107
475 };
476
477 // ELF Relocation types for AVR
478 enum {
479 #include "ELFRelocs/AVR.def"
480 };
481
482 // Mips Specific e_flags
483 enum : unsigned {
484 EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions
485 EF_MIPS_PIC = 0x00000002, // Position independent code
486 EF_MIPS_CPIC = 0x00000004, // Call object with Position independent code
487 EF_MIPS_ABI2 = 0x00000020, // File uses N32 ABI
488 EF_MIPS_32BITMODE = 0x00000100, // Code compiled for a 64-bit machine
489 // in 32-bit mode
490 EF_MIPS_FP64 = 0x00000200, // Code compiled for a 32-bit machine
491 // but uses 64-bit FP registers
492 EF_MIPS_NAN2008 = 0x00000400, // Uses IEE 754-2008 NaN encoding
493
494 // ABI flags
495 EF_MIPS_ABI_O32 = 0x00001000, // This file follows the first MIPS 32 bit ABI
496 EF_MIPS_ABI_O64 = 0x00002000, // O32 ABI extended for 64-bit architecture.
497 EF_MIPS_ABI_EABI32 = 0x00003000, // EABI in 32 bit mode.
498 EF_MIPS_ABI_EABI64 = 0x00004000, // EABI in 64 bit mode.
499 EF_MIPS_ABI = 0x0000f000, // Mask for selecting EF_MIPS_ABI_ variant.
500
501 // MIPS machine variant
502 EF_MIPS_MACH_NONE = 0x00000000, // A standard MIPS implementation.
503 EF_MIPS_MACH_3900 = 0x00810000, // Toshiba R3900
504 EF_MIPS_MACH_4010 = 0x00820000, // LSI R4010
505 EF_MIPS_MACH_4100 = 0x00830000, // NEC VR4100
506 EF_MIPS_MACH_4650 = 0x00850000, // MIPS R4650
507 EF_MIPS_MACH_4120 = 0x00870000, // NEC VR4120
508 EF_MIPS_MACH_4111 = 0x00880000, // NEC VR4111/VR4181
509 EF_MIPS_MACH_SB1 = 0x008a0000, // Broadcom SB-1
510 EF_MIPS_MACH_OCTEON = 0x008b0000, // Cavium Networks Octeon
511 EF_MIPS_MACH_XLR = 0x008c0000, // RMI Xlr
512 EF_MIPS_MACH_OCTEON2 = 0x008d0000, // Cavium Networks Octeon2
513 EF_MIPS_MACH_OCTEON3 = 0x008e0000, // Cavium Networks Octeon3
514 EF_MIPS_MACH_5400 = 0x00910000, // NEC VR5400
515 EF_MIPS_MACH_5900 = 0x00920000, // MIPS R5900
516 EF_MIPS_MACH_5500 = 0x00980000, // NEC VR5500
517 EF_MIPS_MACH_9000 = 0x00990000, // Unknown
518 EF_MIPS_MACH_LS2E = 0x00a00000, // ST Microelectronics Loongson 2E
519 EF_MIPS_MACH_LS2F = 0x00a10000, // ST Microelectronics Loongson 2F
520 EF_MIPS_MACH_LS3A = 0x00a20000, // Loongson 3A
521 EF_MIPS_MACH = 0x00ff0000, // EF_MIPS_MACH_xxx selection mask
522
523 // ARCH_ASE
524 EF_MIPS_MICROMIPS = 0x02000000, // microMIPS
525 EF_MIPS_ARCH_ASE_M16 = 0x04000000, // Has Mips-16 ISA extensions
526 EF_MIPS_ARCH_ASE_MDMX = 0x08000000, // Has MDMX multimedia extensions
527 EF_MIPS_ARCH_ASE = 0x0f000000, // Mask for EF_MIPS_ARCH_ASE_xxx flags
528
529 // ARCH
530 EF_MIPS_ARCH_1 = 0x00000000, // MIPS1 instruction set
531 EF_MIPS_ARCH_2 = 0x10000000, // MIPS2 instruction set
532 EF_MIPS_ARCH_3 = 0x20000000, // MIPS3 instruction set
533 EF_MIPS_ARCH_4 = 0x30000000, // MIPS4 instruction set
534 EF_MIPS_ARCH_5 = 0x40000000, // MIPS5 instruction set
535 EF_MIPS_ARCH_32 = 0x50000000, // MIPS32 instruction set per linux not elf.h
536 EF_MIPS_ARCH_64 = 0x60000000, // MIPS64 instruction set per linux not elf.h
537 EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2, mips32r3, mips32r5
538 EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2, mips64r3, mips64r5
539 EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6
540 EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6
541 EF_MIPS_ARCH = 0xf0000000 // Mask for applying EF_MIPS_ARCH_ variant
542 };
543
544 // ELF Relocation types for Mips
545 enum {
546 #include "ELFRelocs/Mips.def"
547 };
548
549 // Special values for the st_other field in the symbol table entry for MIPS.
550 enum {
551 STO_MIPS_OPTIONAL = 0x04, // Symbol whose definition is optional
552 STO_MIPS_PLT = 0x08, // PLT entry related dynamic table record
553 STO_MIPS_PIC = 0x20, // PIC func in an object mixes PIC/non-PIC
554 STO_MIPS_MICROMIPS = 0x80, // MIPS Specific ISA for MicroMips
555 STO_MIPS_MIPS16 = 0xf0 // MIPS Specific ISA for Mips16
556 };
557
558 // .MIPS.options section descriptor kinds
559 enum {
560 ODK_NULL = 0, // Undefined
561 ODK_REGINFO = 1, // Register usage information
562 ODK_EXCEPTIONS = 2, // Exception processing options
563 ODK_PAD = 3, // Section padding options
564 ODK_HWPATCH = 4, // Hardware patches applied
565 ODK_FILL = 5, // Linker fill value
566 ODK_TAGS = 6, // Space for tool identification
567 ODK_HWAND = 7, // Hardware AND patches applied
568 ODK_HWOR = 8, // Hardware OR patches applied
569 ODK_GP_GROUP = 9, // GP group to use for text/data sections
570 ODK_IDENT = 10, // ID information
571 ODK_PAGESIZE = 11 // Page size information
572 };
573
574 // Hexagon-specific e_flags
575 enum {
576 // Object processor version flags, bits[11:0]
577 EF_HEXAGON_MACH_V2 = 0x00000001, // Hexagon V2
578 EF_HEXAGON_MACH_V3 = 0x00000002, // Hexagon V3
579 EF_HEXAGON_MACH_V4 = 0x00000003, // Hexagon V4
580 EF_HEXAGON_MACH_V5 = 0x00000004, // Hexagon V5
581 EF_HEXAGON_MACH_V55 = 0x00000005, // Hexagon V55
582 EF_HEXAGON_MACH_V60 = 0x00000060, // Hexagon V60
583 EF_HEXAGON_MACH_V62 = 0x00000062, // Hexagon V62
584 EF_HEXAGON_MACH_V65 = 0x00000065, // Hexagon V65
585 EF_HEXAGON_MACH_V66 = 0x00000066, // Hexagon V66
586
587 // Highest ISA version flags
588 EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[11:0]
589 // of e_flags
590 EF_HEXAGON_ISA_V2 = 0x00000010, // Hexagon V2 ISA
591 EF_HEXAGON_ISA_V3 = 0x00000020, // Hexagon V3 ISA
592 EF_HEXAGON_ISA_V4 = 0x00000030, // Hexagon V4 ISA
593 EF_HEXAGON_ISA_V5 = 0x00000040, // Hexagon V5 ISA
594 EF_HEXAGON_ISA_V55 = 0x00000050, // Hexagon V55 ISA
595 EF_HEXAGON_ISA_V60 = 0x00000060, // Hexagon V60 ISA
596 EF_HEXAGON_ISA_V62 = 0x00000062, // Hexagon V62 ISA
597 EF_HEXAGON_ISA_V65 = 0x00000065, // Hexagon V65 ISA
598 EF_HEXAGON_ISA_V66 = 0x00000066, // Hexagon V66 ISA
599 };
600
601 // Hexagon-specific section indexes for common small data
602 enum {
603 SHN_HEXAGON_SCOMMON = 0xff00, // Other access sizes
604 SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access
605 SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access
606 SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access
607 SHN_HEXAGON_SCOMMON_8 = 0xff04 // Double-word-size access
608 };
609
610 // ELF Relocation types for Hexagon
611 enum {
612 #include "ELFRelocs/Hexagon.def"
613 };
614
615 // ELF Relocation type for Lanai.
616 enum {
617 #include "ELFRelocs/Lanai.def"
618 };
619
620 // RISCV Specific e_flags
621 enum : unsigned {
622 EF_RISCV_RVC = 0x0001,
623 EF_RISCV_FLOAT_ABI = 0x0006,
624 EF_RISCV_FLOAT_ABI_SOFT = 0x0000,
625 EF_RISCV_FLOAT_ABI_SINGLE = 0x0002,
626 EF_RISCV_FLOAT_ABI_DOUBLE = 0x0004,
627 EF_RISCV_FLOAT_ABI_QUAD = 0x0006,
628 EF_RISCV_RVE = 0x0008
629 };
630
631 // ELF Relocation types for RISC-V
632 enum {
633 #include "ELFRelocs/RISCV.def"
634 };
635
636 // ELF Relocation types for S390/zSeries
637 enum {
638 #include "ELFRelocs/SystemZ.def"
639 };
640
641 // ELF Relocation type for Sparc.
642 enum {
643 #include "ELFRelocs/Sparc.def"
644 };
645
646 // AMDGPU specific e_flags.
647 enum : unsigned {
648 // Processor selection mask for EF_AMDGPU_MACH_* values.
649 EF_AMDGPU_MACH = 0x0ff,
650
651 // Not specified processor.
652 EF_AMDGPU_MACH_NONE = 0x000,
653
654 // R600-based processors.
655
656 // Radeon HD 2000/3000 Series (R600).
657 EF_AMDGPU_MACH_R600_R600 = 0x001,
658 EF_AMDGPU_MACH_R600_R630 = 0x002,
659 EF_AMDGPU_MACH_R600_RS880 = 0x003,
660 EF_AMDGPU_MACH_R600_RV670 = 0x004,
661 // Radeon HD 4000 Series (R700).
662 EF_AMDGPU_MACH_R600_RV710 = 0x005,
663 EF_AMDGPU_MACH_R600_RV730 = 0x006,
664 EF_AMDGPU_MACH_R600_RV770 = 0x007,
665 // Radeon HD 5000 Series (Evergreen).
666 EF_AMDGPU_MACH_R600_CEDAR = 0x008,
667 EF_AMDGPU_MACH_R600_CYPRESS = 0x009,
668 EF_AMDGPU_MACH_R600_JUNIPER = 0x00a,
669 EF_AMDGPU_MACH_R600_REDWOOD = 0x00b,
670 EF_AMDGPU_MACH_R600_SUMO = 0x00c,
671 // Radeon HD 6000 Series (Northern Islands).
672 EF_AMDGPU_MACH_R600_BARTS = 0x00d,
673 EF_AMDGPU_MACH_R600_CAICOS = 0x00e,
674 EF_AMDGPU_MACH_R600_CAYMAN = 0x00f,
675 EF_AMDGPU_MACH_R600_TURKS = 0x010,
676
677 // Reserved for R600-based processors.
678 EF_AMDGPU_MACH_R600_RESERVED_FIRST = 0x011,
679 EF_AMDGPU_MACH_R600_RESERVED_LAST = 0x01f,
680
681 // First/last R600-based processors.
682 EF_AMDGPU_MACH_R600_FIRST = EF_AMDGPU_MACH_R600_R600,
683 EF_AMDGPU_MACH_R600_LAST = EF_AMDGPU_MACH_R600_TURKS,
684
685 // AMDGCN-based processors.
686
687 // AMDGCN GFX6.
688 EF_AMDGPU_MACH_AMDGCN_GFX600 = 0x020,
689 EF_AMDGPU_MACH_AMDGCN_GFX601 = 0x021,
690 // AMDGCN GFX7.
691 EF_AMDGPU_MACH_AMDGCN_GFX700 = 0x022,
692 EF_AMDGPU_MACH_AMDGCN_GFX701 = 0x023,
693 EF_AMDGPU_MACH_AMDGCN_GFX702 = 0x024,
694 EF_AMDGPU_MACH_AMDGCN_GFX703 = 0x025,
695 EF_AMDGPU_MACH_AMDGCN_GFX704 = 0x026,
696 // AMDGCN GFX8.
697 EF_AMDGPU_MACH_AMDGCN_GFX801 = 0x028,
698 EF_AMDGPU_MACH_AMDGCN_GFX802 = 0x029,
699 EF_AMDGPU_MACH_AMDGCN_GFX803 = 0x02a,
700 EF_AMDGPU_MACH_AMDGCN_GFX810 = 0x02b,
701 // AMDGCN GFX9.
702 EF_AMDGPU_MACH_AMDGCN_GFX900 = 0x02c,
703 EF_AMDGPU_MACH_AMDGCN_GFX902 = 0x02d,
704 EF_AMDGPU_MACH_AMDGCN_GFX904 = 0x02e,
705 EF_AMDGPU_MACH_AMDGCN_GFX906 = 0x02f,
706 EF_AMDGPU_MACH_AMDGCN_GFX909 = 0x031,
707
708 // Reserved for AMDGCN-based processors.
709 EF_AMDGPU_MACH_AMDGCN_RESERVED0 = 0x027,
710 EF_AMDGPU_MACH_AMDGCN_RESERVED1 = 0x030,
711
712 // First/last AMDGCN-based processors.
713 EF_AMDGPU_MACH_AMDGCN_FIRST = EF_AMDGPU_MACH_AMDGCN_GFX600,
714 EF_AMDGPU_MACH_AMDGCN_LAST = EF_AMDGPU_MACH_AMDGCN_GFX909,
715
716 // Indicates if the "xnack" target feature is enabled for all code contained
717 // in the object.
718 EF_AMDGPU_XNACK = 0x100,
719 // Indicates if the "sram-ecc" target feature is enabled for all code
720 // contained in the object.
721 EF_AMDGPU_SRAM_ECC = 0x200,
722 };
723
724 // ELF Relocation types for AMDGPU
725 enum {
726 #include "ELFRelocs/AMDGPU.def"
727 };
728
729 // ELF Relocation types for BPF
730 enum {
731 #include "ELFRelocs/BPF.def"
732 };
733
734 // MSP430 specific e_flags
735 enum : unsigned {
736 EF_MSP430_MACH_MSP430x11 = 11,
737 EF_MSP430_MACH_MSP430x11x1 = 110,
738 EF_MSP430_MACH_MSP430x12 = 12,
739 EF_MSP430_MACH_MSP430x13 = 13,
740 EF_MSP430_MACH_MSP430x14 = 14,
741 EF_MSP430_MACH_MSP430x15 = 15,
742 EF_MSP430_MACH_MSP430x16 = 16,
743 EF_MSP430_MACH_MSP430x20 = 20,
744 EF_MSP430_MACH_MSP430x22 = 22,
745 EF_MSP430_MACH_MSP430x23 = 23,
746 EF_MSP430_MACH_MSP430x24 = 24,
747 EF_MSP430_MACH_MSP430x26 = 26,
748 EF_MSP430_MACH_MSP430x31 = 31,
749 EF_MSP430_MACH_MSP430x32 = 32,
750 EF_MSP430_MACH_MSP430x33 = 33,
751 EF_MSP430_MACH_MSP430x41 = 41,
752 EF_MSP430_MACH_MSP430x42 = 42,
753 EF_MSP430_MACH_MSP430x43 = 43,
754 EF_MSP430_MACH_MSP430x44 = 44,
755 EF_MSP430_MACH_MSP430X = 45,
756 EF_MSP430_MACH_MSP430x46 = 46,
757 EF_MSP430_MACH_MSP430x47 = 47,
758 EF_MSP430_MACH_MSP430x54 = 54,
759 };
760
761 // ELF Relocation types for MSP430
762 enum {
763 #include "ELFRelocs/MSP430.def"
764 };
765
766 #undef ELF_RELOC
767
768 // Section header.
769 struct Elf32_Shdr {
770 Elf32_Word sh_name; // Section name (index into string table)
771 Elf32_Word sh_type; // Section type (SHT_*)
772 Elf32_Word sh_flags; // Section flags (SHF_*)
773 Elf32_Addr sh_addr; // Address where section is to be loaded
774 Elf32_Off sh_offset; // File offset of section data, in bytes
775 Elf32_Word sh_size; // Size of section, in bytes
776 Elf32_Word sh_link; // Section type-specific header table index link
777 Elf32_Word sh_info; // Section type-specific extra information
778 Elf32_Word sh_addralign; // Section address alignment
779 Elf32_Word sh_entsize; // Size of records contained within the section
780 };
781
782 // Section header for ELF64 - same fields as ELF32, different types.
783 struct Elf64_Shdr {
784 Elf64_Word sh_name;
785 Elf64_Word sh_type;
786 Elf64_Xword sh_flags;
787 Elf64_Addr sh_addr;
788 Elf64_Off sh_offset;
789 Elf64_Xword sh_size;
790 Elf64_Word sh_link;
791 Elf64_Word sh_info;
792 Elf64_Xword sh_addralign;
793 Elf64_Xword sh_entsize;
794 };
795
796 // Special section indices.
797 enum {
798 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless
799 SHN_LORESERVE = 0xff00, // Lowest reserved index
800 SHN_LOPROC = 0xff00, // Lowest processor-specific index
801 SHN_HIPROC = 0xff1f, // Highest processor-specific index
802 SHN_LOOS = 0xff20, // Lowest operating system-specific index
803 SHN_HIOS = 0xff3f, // Highest operating system-specific index
804 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation
805 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables
806 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE
807 SHN_HIRESERVE = 0xffff // Highest reserved index
808 };
809
810 // Section types.
811 enum : unsigned {
812 SHT_NULL = 0, // No associated section (inactive entry).
813 SHT_PROGBITS = 1, // Program-defined contents.
814 SHT_SYMTAB = 2, // Symbol table.
815 SHT_STRTAB = 3, // String table.
816 SHT_RELA = 4, // Relocation entries; explicit addends.
817 SHT_HASH = 5, // Symbol hash table.
818 SHT_DYNAMIC = 6, // Information for dynamic linking.
819 SHT_NOTE = 7, // Information about the file.
820 SHT_NOBITS = 8, // Data occupies no space in the file.
821 SHT_REL = 9, // Relocation entries; no explicit addends.
822 SHT_SHLIB = 10, // Reserved.
823 SHT_DYNSYM = 11, // Symbol table.
824 SHT_INIT_ARRAY = 14, // Pointers to initialization functions.
825 SHT_FINI_ARRAY = 15, // Pointers to termination functions.
826 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions.
827 SHT_GROUP = 17, // Section group.
828 SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries.
829 // Experimental support for SHT_RELR sections. For details, see proposal
830 // at https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg
831 SHT_RELR = 19, // Relocation entries; only offsets.
832 SHT_LOOS = 0x60000000, // Lowest operating system-specific type.
833 // Android packed relocation section types.
834 // https://android.googlesource.com/platform/bionic/+/6f12bfece5dcc01325e0abba56a46b1bcf991c69/tools/relocation_packer/src/elf_file.cc#37
835 SHT_ANDROID_REL = 0x60000001,
836 SHT_ANDROID_RELA = 0x60000002,
837 SHT_LLVM_ODRTAB = 0x6fff4c00, // LLVM ODR table.
838 SHT_LLVM_LINKER_OPTIONS = 0x6fff4c01, // LLVM Linker Options.
839 SHT_LLVM_CALL_GRAPH_PROFILE = 0x6fff4c02, // LLVM Call Graph Profile.
840 SHT_LLVM_ADDRSIG = 0x6fff4c03, // List of address-significant symbols
841 // for safe ICF.
842 // Android's experimental support for SHT_RELR sections.
843 // https://android.googlesource.com/platform/bionic/+/b7feec74547f84559a1467aca02708ff61346d2a/libc/include/elf.h#512
844 SHT_ANDROID_RELR = 0x6fffff00, // Relocation entries; only offsets.
845 SHT_GNU_ATTRIBUTES = 0x6ffffff5, // Object attributes.
846 SHT_GNU_HASH = 0x6ffffff6, // GNU-style hash table.
847 SHT_GNU_verdef = 0x6ffffffd, // GNU version definitions.
848 SHT_GNU_verneed = 0x6ffffffe, // GNU version references.
849 SHT_GNU_versym = 0x6fffffff, // GNU symbol versions table.
850 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type.
851 SHT_LOPROC = 0x70000000, // Lowest processor arch-specific type.
852 // Fixme: All this is duplicated in MCSectionELF. Why??
853 // Exception Index table
854 SHT_ARM_EXIDX = 0x70000001U,
855 // BPABI DLL dynamic linking pre-emption map
856 SHT_ARM_PREEMPTMAP = 0x70000002U,
857 // Object file compatibility attributes
858 SHT_ARM_ATTRIBUTES = 0x70000003U,
859 SHT_ARM_DEBUGOVERLAY = 0x70000004U,
860 SHT_ARM_OVERLAYSECTION = 0x70000005U,
861 SHT_HEX_ORDERED = 0x70000000, // Link editor is to sort the entries in
862 // this section based on their sizes
863 SHT_X86_64_UNWIND = 0x70000001, // Unwind information
864
865 SHT_MIPS_REGINFO = 0x70000006, // Register usage information
866 SHT_MIPS_OPTIONS = 0x7000000d, // General options
867 SHT_MIPS_DWARF = 0x7000001e, // DWARF debugging section.
868 SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information.
869
870 SHT_MSP430_ATTRIBUTES = 0x70000003U,
871
872 SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type.
873 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
874 SHT_HIUSER = 0xffffffff // Highest type reserved for applications.
875 };
876
877 // Section flags.
878 enum : unsigned {
879 // Section data should be writable during execution.
880 SHF_WRITE = 0x1,
881
882 // Section occupies memory during program execution.
883 SHF_ALLOC = 0x2,
884
885 // Section contains executable machine instructions.
886 SHF_EXECINSTR = 0x4,
887
888 // The data in this section may be merged.
889 SHF_MERGE = 0x10,
890
891 // The data in this section is null-terminated strings.
892 SHF_STRINGS = 0x20,
893
894 // A field in this section holds a section header table index.
895 SHF_INFO_LINK = 0x40U,
896
897 // Adds special ordering requirements for link editors.
898 SHF_LINK_ORDER = 0x80U,
899
900 // This section requires special OS-specific processing to avoid incorrect
901 // behavior.
902 SHF_OS_NONCONFORMING = 0x100U,
903
904 // This section is a member of a section group.
905 SHF_GROUP = 0x200U,
906
907 // This section holds Thread-Local Storage.
908 SHF_TLS = 0x400U,
909
910 // Identifies a section containing compressed data.
911 SHF_COMPRESSED = 0x800U,
912
913 // This section is excluded from the final executable or shared library.
914 SHF_EXCLUDE = 0x80000000U,
915
916 // Start of target-specific flags.
917
918 SHF_MASKOS = 0x0ff00000,
919
920 // Bits indicating processor-specific flags.
921 SHF_MASKPROC = 0xf0000000,
922
923 /// All sections with the "d" flag are grouped together by the linker to form
924 /// the data section and the dp register is set to the start of the section by
925 /// the boot code.
926 XCORE_SHF_DP_SECTION = 0x10000000,
927
928 /// All sections with the "c" flag are grouped together by the linker to form
929 /// the constant pool and the cp register is set to the start of the constant
930 /// pool by the boot code.
931 XCORE_SHF_CP_SECTION = 0x20000000,
932
933 // If an object file section does not have this flag set, then it may not hold
934 // more than 2GB and can be freely referred to in objects using smaller code
935 // models. Otherwise, only objects using larger code models can refer to them.
936 // For example, a medium code model object can refer to data in a section that
937 // sets this flag besides being able to refer to data in a section that does
938 // not set it; likewise, a small code model object can refer only to code in a
939 // section that does not set this flag.
940 SHF_X86_64_LARGE = 0x10000000,
941
942 // All sections with the GPREL flag are grouped into a global data area
943 // for faster accesses
944 SHF_HEX_GPREL = 0x10000000,
945
946 // Section contains text/data which may be replicated in other sections.
947 // Linker must retain only one copy.
948 SHF_MIPS_NODUPES = 0x01000000,
949
950 // Linker must generate implicit hidden weak names.
951 SHF_MIPS_NAMES = 0x02000000,
952
953 // Section data local to process.
954 SHF_MIPS_LOCAL = 0x04000000,
955
956 // Do not strip this section.
957 SHF_MIPS_NOSTRIP = 0x08000000,
958
959 // Section must be part of global data area.
960 SHF_MIPS_GPREL = 0x10000000,
961
962 // This section should be merged.
963 SHF_MIPS_MERGE = 0x20000000,
964
965 // Address size to be inferred from section entry size.
966 SHF_MIPS_ADDR = 0x40000000,
967
968 // Section data is string data by default.
969 SHF_MIPS_STRING = 0x80000000,
970
971 // Make code section unreadable when in execute-only mode
972 SHF_ARM_PURECODE = 0x20000000
973 };
974
975 // Section Group Flags
976 enum : unsigned {
977 GRP_COMDAT = 0x1,
978 GRP_MASKOS = 0x0ff00000,
979 GRP_MASKPROC = 0xf0000000
980 };
981
982 // Symbol table entries for ELF32.
983 struct Elf32_Sym {
984 Elf32_Word st_name; // Symbol name (index into string table)
985 Elf32_Addr st_value; // Value or address associated with the symbol
986 Elf32_Word st_size; // Size of the symbol
987 unsigned char st_info; // Symbol's type and binding attributes
988 unsigned char st_other; // Must be zero; reserved
989 Elf32_Half st_shndx; // Which section (header table index) it's defined in
990
991 // These accessors and mutators correspond to the ELF32_ST_BIND,
992 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
getBindingElf32_Sym993 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf32_Sym994 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf32_Sym995 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf32_Sym996 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf32_Sym997 void setBindingAndType(unsigned char b, unsigned char t) {
998 st_info = (b << 4) + (t & 0x0f);
999 }
1000 };
1001
1002 // Symbol table entries for ELF64.
1003 struct Elf64_Sym {
1004 Elf64_Word st_name; // Symbol name (index into string table)
1005 unsigned char st_info; // Symbol's type and binding attributes
1006 unsigned char st_other; // Must be zero; reserved
1007 Elf64_Half st_shndx; // Which section (header tbl index) it's defined in
1008 Elf64_Addr st_value; // Value or address associated with the symbol
1009 Elf64_Xword st_size; // Size of the symbol
1010
1011 // These accessors and mutators are identical to those defined for ELF32
1012 // symbol table entries.
getBindingElf64_Sym1013 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf64_Sym1014 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf64_Sym1015 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf64_Sym1016 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf64_Sym1017 void setBindingAndType(unsigned char b, unsigned char t) {
1018 st_info = (b << 4) + (t & 0x0f);
1019 }
1020 };
1021
1022 // The size (in bytes) of symbol table entries.
1023 enum {
1024 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
1025 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size.
1026 };
1027
1028 // Symbol bindings.
1029 enum {
1030 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def
1031 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined
1032 STB_WEAK = 2, // Weak symbol, like global but lower-precedence
1033 STB_GNU_UNIQUE = 10,
1034 STB_LOOS = 10, // Lowest operating system-specific binding type
1035 STB_HIOS = 12, // Highest operating system-specific binding type
1036 STB_LOPROC = 13, // Lowest processor-specific binding type
1037 STB_HIPROC = 15 // Highest processor-specific binding type
1038 };
1039
1040 // Symbol types.
1041 enum {
1042 STT_NOTYPE = 0, // Symbol's type is not specified
1043 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.)
1044 STT_FUNC = 2, // Symbol is executable code (function, etc.)
1045 STT_SECTION = 3, // Symbol refers to a section
1046 STT_FILE = 4, // Local, absolute symbol that refers to a file
1047 STT_COMMON = 5, // An uninitialized common block
1048 STT_TLS = 6, // Thread local data object
1049 STT_GNU_IFUNC = 10, // GNU indirect function
1050 STT_LOOS = 10, // Lowest operating system-specific symbol type
1051 STT_HIOS = 12, // Highest operating system-specific symbol type
1052 STT_LOPROC = 13, // Lowest processor-specific symbol type
1053 STT_HIPROC = 15, // Highest processor-specific symbol type
1054
1055 // AMDGPU symbol types
1056 STT_AMDGPU_HSA_KERNEL = 10
1057 };
1058
1059 enum {
1060 STV_DEFAULT = 0, // Visibility is specified by binding type
1061 STV_INTERNAL = 1, // Defined by processor supplements
1062 STV_HIDDEN = 2, // Not visible to other components
1063 STV_PROTECTED = 3 // Visible in other components but not preemptable
1064 };
1065
1066 // Symbol number.
1067 enum { STN_UNDEF = 0 };
1068
1069 // Special relocation symbols used in the MIPS64 ELF relocation entries
1070 enum {
1071 RSS_UNDEF = 0, // None
1072 RSS_GP = 1, // Value of gp
1073 RSS_GP0 = 2, // Value of gp used to create object being relocated
1074 RSS_LOC = 3 // Address of location being relocated
1075 };
1076
1077 // Relocation entry, without explicit addend.
1078 struct Elf32_Rel {
1079 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
1080 Elf32_Word r_info; // Symbol table index and type of relocation to apply
1081
1082 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1083 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rel1084 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rel1085 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
setSymbolElf32_Rel1086 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rel1087 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rel1088 void setSymbolAndType(Elf32_Word s, unsigned char t) {
1089 r_info = (s << 8) + t;
1090 }
1091 };
1092
1093 // Relocation entry with explicit addend.
1094 struct Elf32_Rela {
1095 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
1096 Elf32_Word r_info; // Symbol table index and type of relocation to apply
1097 Elf32_Sword r_addend; // Compute value for relocatable field by adding this
1098
1099 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1100 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rela1101 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rela1102 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
setSymbolElf32_Rela1103 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rela1104 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rela1105 void setSymbolAndType(Elf32_Word s, unsigned char t) {
1106 r_info = (s << 8) + t;
1107 }
1108 };
1109
1110 // Relocation entry without explicit addend or info (relative relocations only).
1111 typedef Elf32_Word Elf32_Relr; // offset/bitmap for relative relocations
1112
1113 // Relocation entry, without explicit addend.
1114 struct Elf64_Rel {
1115 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
1116 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
1117
1118 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1119 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rel1120 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rel1121 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
setSymbolElf64_Rel1122 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rel1123 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rel1124 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1125 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
1126 }
1127 };
1128
1129 // Relocation entry with explicit addend.
1130 struct Elf64_Rela {
1131 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
1132 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
1133 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this.
1134
1135 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1136 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rela1137 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rela1138 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
setSymbolElf64_Rela1139 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rela1140 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rela1141 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1142 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
1143 }
1144 };
1145
1146 // Relocation entry without explicit addend or info (relative relocations only).
1147 typedef Elf64_Xword Elf64_Relr; // offset/bitmap for relative relocations
1148
1149 // Program header for ELF32.
1150 struct Elf32_Phdr {
1151 Elf32_Word p_type; // Type of segment
1152 Elf32_Off p_offset; // File offset where segment is located, in bytes
1153 Elf32_Addr p_vaddr; // Virtual address of beginning of segment
1154 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
1155 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
1156 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
1157 Elf32_Word p_flags; // Segment flags
1158 Elf32_Word p_align; // Segment alignment constraint
1159 };
1160
1161 // Program header for ELF64.
1162 struct Elf64_Phdr {
1163 Elf64_Word p_type; // Type of segment
1164 Elf64_Word p_flags; // Segment flags
1165 Elf64_Off p_offset; // File offset where segment is located, in bytes
1166 Elf64_Addr p_vaddr; // Virtual address of beginning of segment
1167 Elf64_Addr p_paddr; // Physical addr of beginning of segment (OS-specific)
1168 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero)
1169 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero)
1170 Elf64_Xword p_align; // Segment alignment constraint
1171 };
1172
1173 // Segment types.
1174 enum {
1175 PT_NULL = 0, // Unused segment.
1176 PT_LOAD = 1, // Loadable segment.
1177 PT_DYNAMIC = 2, // Dynamic linking information.
1178 PT_INTERP = 3, // Interpreter pathname.
1179 PT_NOTE = 4, // Auxiliary information.
1180 PT_SHLIB = 5, // Reserved.
1181 PT_PHDR = 6, // The program header table itself.
1182 PT_TLS = 7, // The thread-local storage template.
1183 PT_LOOS = 0x60000000, // Lowest operating system-specific pt entry type.
1184 PT_HIOS = 0x6fffffff, // Highest operating system-specific pt entry type.
1185 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
1186 PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type.
1187
1188 // x86-64 program header types.
1189 // These all contain stack unwind tables.
1190 PT_GNU_EH_FRAME = 0x6474e550,
1191 PT_SUNW_EH_FRAME = 0x6474e550,
1192 PT_SUNW_UNWIND = 0x6464e550,
1193
1194 PT_GNU_STACK = 0x6474e551, // Indicates stack executability.
1195 PT_GNU_RELRO = 0x6474e552, // Read-only after relocation.
1196
1197 PT_OPENBSD_RANDOMIZE = 0x65a3dbe6, // Fill with random data.
1198 PT_OPENBSD_WXNEEDED = 0x65a3dbe7, // Program does W^X violations.
1199 PT_OPENBSD_BOOTDATA = 0x65a41be6, // Section for boot arguments.
1200
1201 // ARM program header types.
1202 PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info
1203 // These all contain stack unwind tables.
1204 PT_ARM_EXIDX = 0x70000001,
1205 PT_ARM_UNWIND = 0x70000001,
1206
1207 // MIPS program header types.
1208 PT_MIPS_REGINFO = 0x70000000, // Register usage information.
1209 PT_MIPS_RTPROC = 0x70000001, // Runtime procedure table.
1210 PT_MIPS_OPTIONS = 0x70000002, // Options segment.
1211 PT_MIPS_ABIFLAGS = 0x70000003, // Abiflags segment.
1212 };
1213
1214 // Segment flag bits.
1215 enum : unsigned {
1216 PF_X = 1, // Execute
1217 PF_W = 2, // Write
1218 PF_R = 4, // Read
1219 PF_MASKOS = 0x0ff00000, // Bits for operating system-specific semantics.
1220 PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics.
1221 };
1222
1223 // Dynamic table entry for ELF32.
1224 struct Elf32_Dyn {
1225 Elf32_Sword d_tag; // Type of dynamic table entry.
1226 union {
1227 Elf32_Word d_val; // Integer value of entry.
1228 Elf32_Addr d_ptr; // Pointer value of entry.
1229 } d_un;
1230 };
1231
1232 // Dynamic table entry for ELF64.
1233 struct Elf64_Dyn {
1234 Elf64_Sxword d_tag; // Type of dynamic table entry.
1235 union {
1236 Elf64_Xword d_val; // Integer value of entry.
1237 Elf64_Addr d_ptr; // Pointer value of entry.
1238 } d_un;
1239 };
1240
1241 // Dynamic table entry tags.
1242 enum {
1243 #define DYNAMIC_TAG(name, value) DT_##name = value,
1244 #include "DynamicTags.def"
1245 #undef DYNAMIC_TAG
1246 };
1247
1248 // DT_FLAGS values.
1249 enum {
1250 DF_ORIGIN = 0x01, // The object may reference $ORIGIN.
1251 DF_SYMBOLIC = 0x02, // Search the shared lib before searching the exe.
1252 DF_TEXTREL = 0x04, // Relocations may modify a non-writable segment.
1253 DF_BIND_NOW = 0x08, // Process all relocations on load.
1254 DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically.
1255 };
1256
1257 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry.
1258 enum {
1259 DF_1_NOW = 0x00000001, // Set RTLD_NOW for this object.
1260 DF_1_GLOBAL = 0x00000002, // Set RTLD_GLOBAL for this object.
1261 DF_1_GROUP = 0x00000004, // Set RTLD_GROUP for this object.
1262 DF_1_NODELETE = 0x00000008, // Set RTLD_NODELETE for this object.
1263 DF_1_LOADFLTR = 0x00000010, // Trigger filtee loading at runtime.
1264 DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object.
1265 DF_1_NOOPEN = 0x00000040, // Set RTLD_NOOPEN for this object.
1266 DF_1_ORIGIN = 0x00000080, // $ORIGIN must be handled.
1267 DF_1_DIRECT = 0x00000100, // Direct binding enabled.
1268 DF_1_TRANS = 0x00000200,
1269 DF_1_INTERPOSE = 0x00000400, // Object is used to interpose.
1270 DF_1_NODEFLIB = 0x00000800, // Ignore default lib search path.
1271 DF_1_NODUMP = 0x00001000, // Object can't be dldump'ed.
1272 DF_1_CONFALT = 0x00002000, // Configuration alternative created.
1273 DF_1_ENDFILTEE = 0x00004000, // Filtee terminates filters search.
1274 DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time.
1275 DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time.
1276 DF_1_NODIRECT = 0x00020000, // Object has no-direct binding.
1277 DF_1_IGNMULDEF = 0x00040000,
1278 DF_1_NOKSYMS = 0x00080000,
1279 DF_1_NOHDR = 0x00100000,
1280 DF_1_EDITED = 0x00200000, // Object is modified after built.
1281 DF_1_NORELOC = 0x00400000,
1282 DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers.
1283 DF_1_GLOBAUDIT = 0x01000000, // Global auditing required.
1284 DF_1_SINGLETON = 0x02000000 // Singleton symbols are used.
1285 };
1286
1287 // DT_MIPS_FLAGS values.
1288 enum {
1289 RHF_NONE = 0x00000000, // No flags.
1290 RHF_QUICKSTART = 0x00000001, // Uses shortcut pointers.
1291 RHF_NOTPOT = 0x00000002, // Hash size is not a power of two.
1292 RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH.
1293 RHF_NO_MOVE = 0x00000008, // DSO address may not be relocated.
1294 RHF_SGI_ONLY = 0x00000010, // SGI specific features.
1295 RHF_GUARANTEE_INIT = 0x00000020, // Guarantee that .init will finish
1296 // executing before any non-init
1297 // code in DSO is called.
1298 RHF_DELTA_C_PLUS_PLUS = 0x00000040, // Contains Delta C++ code.
1299 RHF_GUARANTEE_START_INIT = 0x00000080, // Guarantee that .init will start
1300 // executing before any non-init
1301 // code in DSO is called.
1302 RHF_PIXIE = 0x00000100, // Generated by pixie.
1303 RHF_DEFAULT_DELAY_LOAD = 0x00000200, // Delay-load DSO by default.
1304 RHF_REQUICKSTART = 0x00000400, // Object may be requickstarted
1305 RHF_REQUICKSTARTED = 0x00000800, // Object has been requickstarted
1306 RHF_CORD = 0x00001000, // Generated by cord.
1307 RHF_NO_UNRES_UNDEF = 0x00002000, // Object contains no unresolved
1308 // undef symbols.
1309 RHF_RLD_ORDER_SAFE = 0x00004000 // Symbol table is in a safe order.
1310 };
1311
1312 // ElfXX_VerDef structure version (GNU versioning)
1313 enum { VER_DEF_NONE = 0, VER_DEF_CURRENT = 1 };
1314
1315 // VerDef Flags (ElfXX_VerDef::vd_flags)
1316 enum { VER_FLG_BASE = 0x1, VER_FLG_WEAK = 0x2, VER_FLG_INFO = 0x4 };
1317
1318 // Special constants for the version table. (SHT_GNU_versym/.gnu.version)
1319 enum {
1320 VER_NDX_LOCAL = 0, // Unversioned local symbol
1321 VER_NDX_GLOBAL = 1, // Unversioned global symbol
1322 VERSYM_VERSION = 0x7fff, // Version Index mask
1323 VERSYM_HIDDEN = 0x8000 // Hidden bit (non-default version)
1324 };
1325
1326 // ElfXX_VerNeed structure version (GNU versioning)
1327 enum { VER_NEED_NONE = 0, VER_NEED_CURRENT = 1 };
1328
1329 // SHT_NOTE section types
1330 enum {
1331 NT_FREEBSD_THRMISC = 7,
1332 NT_FREEBSD_PROCSTAT_PROC = 8,
1333 NT_FREEBSD_PROCSTAT_FILES = 9,
1334 NT_FREEBSD_PROCSTAT_VMMAP = 10,
1335 NT_FREEBSD_PROCSTAT_GROUPS = 11,
1336 NT_FREEBSD_PROCSTAT_UMASK = 12,
1337 NT_FREEBSD_PROCSTAT_RLIMIT = 13,
1338 NT_FREEBSD_PROCSTAT_OSREL = 14,
1339 NT_FREEBSD_PROCSTAT_PSSTRINGS = 15,
1340 NT_FREEBSD_PROCSTAT_AUXV = 16,
1341 };
1342
1343 enum {
1344 NT_GNU_ABI_TAG = 1,
1345 NT_GNU_HWCAP = 2,
1346 NT_GNU_BUILD_ID = 3,
1347 NT_GNU_GOLD_VERSION = 4,
1348 NT_GNU_PROPERTY_TYPE_0 = 5,
1349 };
1350
1351 // Property types used in GNU_PROPERTY_TYPE_0 notes.
1352 enum : unsigned {
1353 GNU_PROPERTY_STACK_SIZE = 1,
1354 GNU_PROPERTY_NO_COPY_ON_PROTECTED = 2,
1355 GNU_PROPERTY_X86_FEATURE_1_AND = 0xc0000002
1356 };
1357
1358 // CET properties
1359 enum {
1360 GNU_PROPERTY_X86_FEATURE_1_IBT = 1 << 0,
1361 GNU_PROPERTY_X86_FEATURE_1_SHSTK = 1 << 1
1362 };
1363
1364 // AMD specific notes. (Code Object V2)
1365 enum {
1366 // Note types with values between 0 and 9 (inclusive) are reserved.
1367 NT_AMD_AMDGPU_HSA_METADATA = 10,
1368 NT_AMD_AMDGPU_ISA = 11,
1369 NT_AMD_AMDGPU_PAL_METADATA = 12
1370 };
1371
1372 // AMDGPU specific notes. (Code Object V3)
1373 enum {
1374 // Note types with values between 0 and 31 (inclusive) are reserved.
1375 NT_AMDGPU_METADATA = 32
1376 };
1377
1378 enum {
1379 GNU_ABI_TAG_LINUX = 0,
1380 GNU_ABI_TAG_HURD = 1,
1381 GNU_ABI_TAG_SOLARIS = 2,
1382 GNU_ABI_TAG_FREEBSD = 3,
1383 GNU_ABI_TAG_NETBSD = 4,
1384 GNU_ABI_TAG_SYLLABLE = 5,
1385 GNU_ABI_TAG_NACL = 6,
1386 };
1387
1388 constexpr const char *ELF_NOTE_GNU = "GNU";
1389
1390 // Android packed relocation group flags.
1391 enum {
1392 RELOCATION_GROUPED_BY_INFO_FLAG = 1,
1393 RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG = 2,
1394 RELOCATION_GROUPED_BY_ADDEND_FLAG = 4,
1395 RELOCATION_GROUP_HAS_ADDEND_FLAG = 8,
1396 };
1397
1398 // Compressed section header for ELF32.
1399 struct Elf32_Chdr {
1400 Elf32_Word ch_type;
1401 Elf32_Word ch_size;
1402 Elf32_Word ch_addralign;
1403 };
1404
1405 // Compressed section header for ELF64.
1406 struct Elf64_Chdr {
1407 Elf64_Word ch_type;
1408 Elf64_Word ch_reserved;
1409 Elf64_Xword ch_size;
1410 Elf64_Xword ch_addralign;
1411 };
1412
1413 // Node header for ELF32.
1414 struct Elf32_Nhdr {
1415 Elf32_Word n_namesz;
1416 Elf32_Word n_descsz;
1417 Elf32_Word n_type;
1418 };
1419
1420 // Node header for ELF64.
1421 struct Elf64_Nhdr {
1422 Elf64_Word n_namesz;
1423 Elf64_Word n_descsz;
1424 Elf64_Word n_type;
1425 };
1426
1427 // Legal values for ch_type field of compressed section header.
1428 enum {
1429 ELFCOMPRESS_ZLIB = 1, // ZLIB/DEFLATE algorithm.
1430 ELFCOMPRESS_LOOS = 0x60000000, // Start of OS-specific.
1431 ELFCOMPRESS_HIOS = 0x6fffffff, // End of OS-specific.
1432 ELFCOMPRESS_LOPROC = 0x70000000, // Start of processor-specific.
1433 ELFCOMPRESS_HIPROC = 0x7fffffff // End of processor-specific.
1434 };
1435
1436 } // end namespace ELF
1437 } // end namespace llvm
1438
1439 #endif // LLVM_BINARYFORMAT_ELF_H
1440