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 <cstdint>
23 #include <cstring>
24
25 namespace llvm {
26 namespace ELF {
27
28 using Elf32_Addr = uint32_t; // Program address
29 using Elf32_Off = uint32_t; // File offset
30 using Elf32_Half = uint16_t;
31 using Elf32_Word = uint32_t;
32 using Elf32_Sword = int32_t;
33
34 using Elf64_Addr = uint64_t;
35 using Elf64_Off = uint64_t;
36 using Elf64_Half = uint16_t;
37 using Elf64_Word = uint32_t;
38 using Elf64_Sword = int32_t;
39 using Elf64_Xword = uint64_t;
40 using Elf64_Sxword = int64_t;
41
42 // Object file magic string.
43 static const char ElfMagic[] = {0x7f, 'E', 'L', 'F', '\0'};
44
45 // e_ident size and indices.
46 enum {
47 EI_MAG0 = 0, // File identification index.
48 EI_MAG1 = 1, // File identification index.
49 EI_MAG2 = 2, // File identification index.
50 EI_MAG3 = 3, // File identification index.
51 EI_CLASS = 4, // File class.
52 EI_DATA = 5, // Data encoding.
53 EI_VERSION = 6, // File version.
54 EI_OSABI = 7, // OS/ABI identification.
55 EI_ABIVERSION = 8, // ABI version.
56 EI_PAD = 9, // Start of padding bytes.
57 EI_NIDENT = 16 // Number of bytes in e_ident.
58 };
59
60 struct Elf32_Ehdr {
61 unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes
62 Elf32_Half e_type; // Type of file (see ET_* below)
63 Elf32_Half e_machine; // Required architecture for this file (see EM_*)
64 Elf32_Word e_version; // Must be equal to 1
65 Elf32_Addr e_entry; // Address to jump to in order to start program
66 Elf32_Off e_phoff; // Program header table's file offset, in bytes
67 Elf32_Off e_shoff; // Section header table's file offset, in bytes
68 Elf32_Word e_flags; // Processor-specific flags
69 Elf32_Half e_ehsize; // Size of ELF header, in bytes
70 Elf32_Half e_phentsize; // Size of an entry in the program header table
71 Elf32_Half e_phnum; // Number of entries in the program header table
72 Elf32_Half e_shentsize; // Size of an entry in the section header table
73 Elf32_Half e_shnum; // Number of entries in the section header table
74 Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table
75
checkMagicElf32_Ehdr76 bool checkMagic() const {
77 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
78 }
79
getFileClassElf32_Ehdr80 unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
getDataEncodingElf32_Ehdr81 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
82 };
83
84 // 64-bit ELF header. Fields are the same as for ELF32, but with different
85 // types (see above).
86 struct Elf64_Ehdr {
87 unsigned char e_ident[EI_NIDENT];
88 Elf64_Half e_type;
89 Elf64_Half e_machine;
90 Elf64_Word e_version;
91 Elf64_Addr e_entry;
92 Elf64_Off e_phoff;
93 Elf64_Off e_shoff;
94 Elf64_Word e_flags;
95 Elf64_Half e_ehsize;
96 Elf64_Half e_phentsize;
97 Elf64_Half e_phnum;
98 Elf64_Half e_shentsize;
99 Elf64_Half e_shnum;
100 Elf64_Half e_shstrndx;
101
checkMagicElf64_Ehdr102 bool checkMagic() const {
103 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
104 }
105
getFileClassElf64_Ehdr106 unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
getDataEncodingElf64_Ehdr107 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
108 };
109
110 // File types.
111 // See current registered ELF types at:
112 // http://www.sco.com/developers/gabi/latest/ch4.eheader.html
113 enum {
114 ET_NONE = 0, // No file type
115 ET_REL = 1, // Relocatable file
116 ET_EXEC = 2, // Executable file
117 ET_DYN = 3, // Shared object file
118 ET_CORE = 4, // Core file
119 ET_LOOS = 0xfe00, // Beginning of operating system-specific codes
120 ET_HIOS = 0xfeff, // Operating system-specific
121 ET_LOPROC = 0xff00, // Beginning of processor-specific codes
122 ET_HIPROC = 0xffff // Processor-specific
123 };
124
125 // Versioning
126 enum { EV_NONE = 0, EV_CURRENT = 1 };
127
128 // Machine architectures
129 // See current registered ELF machine architectures at:
130 // http://www.uxsglobal.com/developers/gabi/latest/ch4.eheader.html
131 enum {
132 EM_NONE = 0, // No machine
133 EM_M32 = 1, // AT&T WE 32100
134 EM_SPARC = 2, // SPARC
135 EM_386 = 3, // Intel 386
136 EM_68K = 4, // Motorola 68000
137 EM_88K = 5, // Motorola 88000
138 EM_IAMCU = 6, // Intel MCU
139 EM_860 = 7, // Intel 80860
140 EM_MIPS = 8, // MIPS R3000
141 EM_S370 = 9, // IBM System/370
142 EM_MIPS_RS3_LE = 10, // MIPS RS3000 Little-endian
143 EM_PARISC = 15, // Hewlett-Packard PA-RISC
144 EM_VPP500 = 17, // Fujitsu VPP500
145 EM_SPARC32PLUS = 18, // Enhanced instruction set SPARC
146 EM_960 = 19, // Intel 80960
147 EM_PPC = 20, // PowerPC
148 EM_PPC64 = 21, // PowerPC64
149 EM_S390 = 22, // IBM System/390
150 EM_SPU = 23, // IBM SPU/SPC
151 EM_V800 = 36, // NEC V800
152 EM_FR20 = 37, // Fujitsu FR20
153 EM_RH32 = 38, // TRW RH-32
154 EM_RCE = 39, // Motorola RCE
155 EM_ARM = 40, // ARM
156 EM_ALPHA = 41, // DEC Alpha
157 EM_SH = 42, // Hitachi SH
158 EM_SPARCV9 = 43, // SPARC V9
159 EM_TRICORE = 44, // Siemens TriCore
160 EM_ARC = 45, // Argonaut RISC Core
161 EM_H8_300 = 46, // Hitachi H8/300
162 EM_H8_300H = 47, // Hitachi H8/300H
163 EM_H8S = 48, // Hitachi H8S
164 EM_H8_500 = 49, // Hitachi H8/500
165 EM_IA_64 = 50, // Intel IA-64 processor architecture
166 EM_MIPS_X = 51, // Stanford MIPS-X
167 EM_COLDFIRE = 52, // Motorola ColdFire
168 EM_68HC12 = 53, // Motorola M68HC12
169 EM_MMA = 54, // Fujitsu MMA Multimedia Accelerator
170 EM_PCP = 55, // Siemens PCP
171 EM_NCPU = 56, // Sony nCPU embedded RISC processor
172 EM_NDR1 = 57, // Denso NDR1 microprocessor
173 EM_STARCORE = 58, // Motorola Star*Core processor
174 EM_ME16 = 59, // Toyota ME16 processor
175 EM_ST100 = 60, // STMicroelectronics ST100 processor
176 EM_TINYJ = 61, // Advanced Logic Corp. TinyJ embedded processor family
177 EM_X86_64 = 62, // AMD x86-64 architecture
178 EM_PDSP = 63, // Sony DSP Processor
179 EM_PDP10 = 64, // Digital Equipment Corp. PDP-10
180 EM_PDP11 = 65, // Digital Equipment Corp. PDP-11
181 EM_FX66 = 66, // Siemens FX66 microcontroller
182 EM_ST9PLUS = 67, // STMicroelectronics ST9+ 8/16 bit microcontroller
183 EM_ST7 = 68, // STMicroelectronics ST7 8-bit microcontroller
184 EM_68HC16 = 69, // Motorola MC68HC16 Microcontroller
185 EM_68HC11 = 70, // Motorola MC68HC11 Microcontroller
186 EM_68HC08 = 71, // Motorola MC68HC08 Microcontroller
187 EM_68HC05 = 72, // Motorola MC68HC05 Microcontroller
188 EM_SVX = 73, // Silicon Graphics SVx
189 EM_ST19 = 74, // STMicroelectronics ST19 8-bit microcontroller
190 EM_VAX = 75, // Digital VAX
191 EM_CRIS = 76, // Axis Communications 32-bit embedded processor
192 EM_JAVELIN = 77, // Infineon Technologies 32-bit embedded processor
193 EM_FIREPATH = 78, // Element 14 64-bit DSP Processor
194 EM_ZSP = 79, // LSI Logic 16-bit DSP Processor
195 EM_MMIX = 80, // Donald Knuth's educational 64-bit processor
196 EM_HUANY = 81, // Harvard University machine-independent object files
197 EM_PRISM = 82, // SiTera Prism
198 EM_AVR = 83, // Atmel AVR 8-bit microcontroller
199 EM_FR30 = 84, // Fujitsu FR30
200 EM_D10V = 85, // Mitsubishi D10V
201 EM_D30V = 86, // Mitsubishi D30V
202 EM_V850 = 87, // NEC v850
203 EM_M32R = 88, // Mitsubishi M32R
204 EM_MN10300 = 89, // Matsushita MN10300
205 EM_MN10200 = 90, // Matsushita MN10200
206 EM_PJ = 91, // picoJava
207 EM_OPENRISC = 92, // OpenRISC 32-bit embedded processor
208 EM_ARC_COMPACT = 93, // ARC International ARCompact processor (old
209 // spelling/synonym: EM_ARC_A5)
210 EM_XTENSA = 94, // Tensilica Xtensa Architecture
211 EM_VIDEOCORE = 95, // Alphamosaic VideoCore processor
212 EM_TMM_GPP = 96, // Thompson Multimedia General Purpose Processor
213 EM_NS32K = 97, // National Semiconductor 32000 series
214 EM_TPC = 98, // Tenor Network TPC processor
215 EM_SNP1K = 99, // Trebia SNP 1000 processor
216 EM_ST200 = 100, // STMicroelectronics (www.st.com) ST200
217 EM_IP2K = 101, // Ubicom IP2xxx microcontroller family
218 EM_MAX = 102, // MAX Processor
219 EM_CR = 103, // National Semiconductor CompactRISC microprocessor
220 EM_F2MC16 = 104, // Fujitsu F2MC16
221 EM_MSP430 = 105, // Texas Instruments embedded microcontroller msp430
222 EM_BLACKFIN = 106, // Analog Devices Blackfin (DSP) processor
223 EM_SE_C33 = 107, // S1C33 Family of Seiko Epson processors
224 EM_SEP = 108, // Sharp embedded microprocessor
225 EM_ARCA = 109, // Arca RISC Microprocessor
226 EM_UNICORE = 110, // Microprocessor series from PKU-Unity Ltd. and MPRC
227 // of Peking University
228 EM_EXCESS = 111, // eXcess: 16/32/64-bit configurable embedded CPU
229 EM_DXP = 112, // Icera Semiconductor Inc. Deep Execution Processor
230 EM_ALTERA_NIOS2 = 113, // Altera Nios II soft-core processor
231 EM_CRX = 114, // National Semiconductor CompactRISC CRX
232 EM_XGATE = 115, // Motorola XGATE embedded processor
233 EM_C166 = 116, // Infineon C16x/XC16x processor
234 EM_M16C = 117, // Renesas M16C series microprocessors
235 EM_DSPIC30F = 118, // Microchip Technology dsPIC30F Digital Signal
236 // Controller
237 EM_CE = 119, // Freescale Communication Engine RISC core
238 EM_M32C = 120, // Renesas M32C series microprocessors
239 EM_TSK3000 = 131, // Altium TSK3000 core
240 EM_RS08 = 132, // Freescale RS08 embedded processor
241 EM_SHARC = 133, // Analog Devices SHARC family of 32-bit DSP
242 // processors
243 EM_ECOG2 = 134, // Cyan Technology eCOG2 microprocessor
244 EM_SCORE7 = 135, // Sunplus S+core7 RISC processor
245 EM_DSP24 = 136, // New Japan Radio (NJR) 24-bit DSP Processor
246 EM_VIDEOCORE3 = 137, // Broadcom VideoCore III processor
247 EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture
248 EM_SE_C17 = 139, // Seiko Epson C17 family
249 EM_TI_C6000 = 140, // The Texas Instruments TMS320C6000 DSP family
250 EM_TI_C2000 = 141, // The Texas Instruments TMS320C2000 DSP family
251 EM_TI_C5500 = 142, // The Texas Instruments TMS320C55x DSP family
252 EM_MMDSP_PLUS = 160, // STMicroelectronics 64bit VLIW Data Signal Processor
253 EM_CYPRESS_M8C = 161, // Cypress M8C microprocessor
254 EM_R32C = 162, // Renesas R32C series microprocessors
255 EM_TRIMEDIA = 163, // NXP Semiconductors TriMedia architecture family
256 EM_HEXAGON = 164, // Qualcomm Hexagon processor
257 EM_8051 = 165, // Intel 8051 and variants
258 EM_STXP7X = 166, // STMicroelectronics STxP7x family of configurable
259 // and extensible RISC processors
260 EM_NDS32 = 167, // Andes Technology compact code size embedded RISC
261 // processor family
262 EM_ECOG1 = 168, // Cyan Technology eCOG1X family
263 EM_ECOG1X = 168, // Cyan Technology eCOG1X family
264 EM_MAXQ30 = 169, // Dallas Semiconductor MAXQ30 Core Micro-controllers
265 EM_XIMO16 = 170, // New Japan Radio (NJR) 16-bit DSP Processor
266 EM_MANIK = 171, // M2000 Reconfigurable RISC Microprocessor
267 EM_CRAYNV2 = 172, // Cray Inc. NV2 vector architecture
268 EM_RX = 173, // Renesas RX family
269 EM_METAG = 174, // Imagination Technologies META processor
270 // architecture
271 EM_MCST_ELBRUS = 175, // MCST Elbrus general purpose hardware architecture
272 EM_ECOG16 = 176, // Cyan Technology eCOG16 family
273 EM_CR16 = 177, // National Semiconductor CompactRISC CR16 16-bit
274 // microprocessor
275 EM_ETPU = 178, // Freescale Extended Time Processing Unit
276 EM_SLE9X = 179, // Infineon Technologies SLE9X core
277 EM_L10M = 180, // Intel L10M
278 EM_K10M = 181, // Intel K10M
279 EM_AARCH64 = 183, // ARM AArch64
280 EM_AVR32 = 185, // Atmel Corporation 32-bit microprocessor family
281 EM_STM8 = 186, // STMicroeletronics STM8 8-bit microcontroller
282 EM_TILE64 = 187, // Tilera TILE64 multicore architecture family
283 EM_TILEPRO = 188, // Tilera TILEPro multicore architecture family
284 EM_CUDA = 190, // NVIDIA CUDA architecture
285 EM_TILEGX = 191, // Tilera TILE-Gx multicore architecture family
286 EM_CLOUDSHIELD = 192, // CloudShield architecture family
287 EM_COREA_1ST = 193, // KIPO-KAIST Core-A 1st generation processor family
288 EM_COREA_2ND = 194, // KIPO-KAIST Core-A 2nd generation processor family
289 EM_ARC_COMPACT2 = 195, // Synopsys ARCompact V2
290 EM_OPEN8 = 196, // Open8 8-bit RISC soft processor core
291 EM_RL78 = 197, // Renesas RL78 family
292 EM_VIDEOCORE5 = 198, // Broadcom VideoCore V processor
293 EM_78KOR = 199, // Renesas 78KOR family
294 EM_56800EX = 200, // Freescale 56800EX Digital Signal Controller (DSC)
295 EM_BA1 = 201, // Beyond BA1 CPU architecture
296 EM_BA2 = 202, // Beyond BA2 CPU architecture
297 EM_XCORE = 203, // XMOS xCORE processor family
298 EM_MCHP_PIC = 204, // Microchip 8-bit PIC(r) family
299 EM_INTEL205 = 205, // Reserved by Intel
300 EM_INTEL206 = 206, // Reserved by Intel
301 EM_INTEL207 = 207, // Reserved by Intel
302 EM_INTEL208 = 208, // Reserved by Intel
303 EM_INTEL209 = 209, // Reserved by Intel
304 EM_KM32 = 210, // KM211 KM32 32-bit processor
305 EM_KMX32 = 211, // KM211 KMX32 32-bit processor
306 EM_KMX16 = 212, // KM211 KMX16 16-bit processor
307 EM_KMX8 = 213, // KM211 KMX8 8-bit processor
308 EM_KVARC = 214, // KM211 KVARC processor
309 EM_CDP = 215, // Paneve CDP architecture family
310 EM_COGE = 216, // Cognitive Smart Memory Processor
311 EM_COOL = 217, // iCelero CoolEngine
312 EM_NORC = 218, // Nanoradio Optimized RISC
313 EM_CSR_KALIMBA = 219, // CSR Kalimba architecture family
314 EM_AMDGPU = 224, // AMD GPU architecture
315 EM_RISCV = 243, // RISC-V
316 EM_LANAI = 244, // Lanai 32-bit processor
317 EM_BPF = 247, // Linux kernel bpf virtual machine
318 EM_VE = 251, // NEC SX-Aurora VE
319 EM_CSKY = 252, // C-SKY 32-bit processor
320 };
321
322 // Object file classes.
323 enum {
324 ELFCLASSNONE = 0,
325 ELFCLASS32 = 1, // 32-bit object file
326 ELFCLASS64 = 2 // 64-bit object file
327 };
328
329 // Object file byte orderings.
330 enum {
331 ELFDATANONE = 0, // Invalid data encoding.
332 ELFDATA2LSB = 1, // Little-endian object file
333 ELFDATA2MSB = 2 // Big-endian object file
334 };
335
336 // OS ABI identification.
337 enum {
338 ELFOSABI_NONE = 0, // UNIX System V ABI
339 ELFOSABI_HPUX = 1, // HP-UX operating system
340 ELFOSABI_NETBSD = 2, // NetBSD
341 ELFOSABI_GNU = 3, // GNU/Linux
342 ELFOSABI_LINUX = 3, // Historical alias for ELFOSABI_GNU.
343 ELFOSABI_HURD = 4, // GNU/Hurd
344 ELFOSABI_SOLARIS = 6, // Solaris
345 ELFOSABI_AIX = 7, // AIX
346 ELFOSABI_IRIX = 8, // IRIX
347 ELFOSABI_FREEBSD = 9, // FreeBSD
348 ELFOSABI_TRU64 = 10, // TRU64 UNIX
349 ELFOSABI_MODESTO = 11, // Novell Modesto
350 ELFOSABI_OPENBSD = 12, // OpenBSD
351 ELFOSABI_OPENVMS = 13, // OpenVMS
352 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel
353 ELFOSABI_AROS = 15, // AROS
354 ELFOSABI_FENIXOS = 16, // FenixOS
355 ELFOSABI_CLOUDABI = 17, // Nuxi CloudABI
356 ELFOSABI_FIRST_ARCH = 64, // First architecture-specific OS ABI
357 ELFOSABI_AMDGPU_HSA = 64, // AMD HSA runtime
358 ELFOSABI_AMDGPU_PAL = 65, // AMD PAL runtime
359 ELFOSABI_AMDGPU_MESA3D = 66, // AMD GCN GPUs (GFX6+) for MESA runtime
360 ELFOSABI_ARM = 97, // ARM
361 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
362 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000
363 ELFOSABI_STANDALONE = 255, // Standalone (embedded) application
364 ELFOSABI_LAST_ARCH = 255 // Last Architecture-specific OS ABI
365 };
366
367 // AMDGPU OS ABI Version identification.
368 enum {
369 // ELFABIVERSION_AMDGPU_HSA_V1 does not exist because OS ABI identification
370 // was never defined for V1.
371 ELFABIVERSION_AMDGPU_HSA_V2 = 0,
372 ELFABIVERSION_AMDGPU_HSA_V3 = 1,
373 };
374
375 #define ELF_RELOC(name, value) name = value,
376
377 // X86_64 relocations.
378 enum {
379 #include "ELFRelocs/x86_64.def"
380 };
381
382 // i386 relocations.
383 enum {
384 #include "ELFRelocs/i386.def"
385 };
386
387 // ELF Relocation types for PPC32
388 enum {
389 #include "ELFRelocs/PowerPC.def"
390 };
391
392 // Specific e_flags for PPC64
393 enum {
394 // e_flags bits specifying ABI:
395 // 1 for original ABI using function descriptors,
396 // 2 for revised ABI without function descriptors,
397 // 0 for unspecified or not using any features affected by the differences.
398 EF_PPC64_ABI = 3
399 };
400
401 // Special values for the st_other field in the symbol table entry for PPC64.
402 enum {
403 STO_PPC64_LOCAL_BIT = 5,
404 STO_PPC64_LOCAL_MASK = (7 << STO_PPC64_LOCAL_BIT)
405 };
decodePPC64LocalEntryOffset(unsigned Other)406 static inline int64_t decodePPC64LocalEntryOffset(unsigned Other) {
407 unsigned Val = (Other & STO_PPC64_LOCAL_MASK) >> STO_PPC64_LOCAL_BIT;
408 return ((1 << Val) >> 2) << 2;
409 }
410
411 // ELF Relocation types for PPC64
412 enum {
413 #include "ELFRelocs/PowerPC64.def"
414 };
415
416 // ELF Relocation types for AArch64
417 enum {
418 #include "ELFRelocs/AArch64.def"
419 };
420
421 // Special values for the st_other field in the symbol table entry for AArch64.
422 enum {
423 // Symbol may follow different calling convention than base PCS.
424 STO_AARCH64_VARIANT_PCS = 0x80
425 };
426
427 // ARM Specific e_flags
428 enum : unsigned {
429 EF_ARM_SOFT_FLOAT = 0x00000200U, // Legacy pre EABI_VER5
430 EF_ARM_ABI_FLOAT_SOFT = 0x00000200U, // EABI_VER5
431 EF_ARM_VFP_FLOAT = 0x00000400U, // Legacy pre EABI_VER5
432 EF_ARM_ABI_FLOAT_HARD = 0x00000400U, // EABI_VER5
433 EF_ARM_EABI_UNKNOWN = 0x00000000U,
434 EF_ARM_EABI_VER1 = 0x01000000U,
435 EF_ARM_EABI_VER2 = 0x02000000U,
436 EF_ARM_EABI_VER3 = 0x03000000U,
437 EF_ARM_EABI_VER4 = 0x04000000U,
438 EF_ARM_EABI_VER5 = 0x05000000U,
439 EF_ARM_EABIMASK = 0xFF000000U
440 };
441
442 // ELF Relocation types for ARM
443 enum {
444 #include "ELFRelocs/ARM.def"
445 };
446
447 // ARC Specific e_flags
448 enum : unsigned {
449 EF_ARC_MACH_MSK = 0x000000ff,
450 EF_ARC_OSABI_MSK = 0x00000f00,
451 E_ARC_MACH_ARC600 = 0x00000002,
452 E_ARC_MACH_ARC601 = 0x00000004,
453 E_ARC_MACH_ARC700 = 0x00000003,
454 EF_ARC_CPU_ARCV2EM = 0x00000005,
455 EF_ARC_CPU_ARCV2HS = 0x00000006,
456 E_ARC_OSABI_ORIG = 0x00000000,
457 E_ARC_OSABI_V2 = 0x00000200,
458 E_ARC_OSABI_V3 = 0x00000300,
459 E_ARC_OSABI_V4 = 0x00000400,
460 EF_ARC_PIC = 0x00000100
461 };
462
463 // ELF Relocation types for ARC
464 enum {
465 #include "ELFRelocs/ARC.def"
466 };
467
468 // AVR specific e_flags
469 enum : unsigned {
470 EF_AVR_ARCH_AVR1 = 1,
471 EF_AVR_ARCH_AVR2 = 2,
472 EF_AVR_ARCH_AVR25 = 25,
473 EF_AVR_ARCH_AVR3 = 3,
474 EF_AVR_ARCH_AVR31 = 31,
475 EF_AVR_ARCH_AVR35 = 35,
476 EF_AVR_ARCH_AVR4 = 4,
477 EF_AVR_ARCH_AVR5 = 5,
478 EF_AVR_ARCH_AVR51 = 51,
479 EF_AVR_ARCH_AVR6 = 6,
480 EF_AVR_ARCH_AVRTINY = 100,
481 EF_AVR_ARCH_XMEGA1 = 101,
482 EF_AVR_ARCH_XMEGA2 = 102,
483 EF_AVR_ARCH_XMEGA3 = 103,
484 EF_AVR_ARCH_XMEGA4 = 104,
485 EF_AVR_ARCH_XMEGA5 = 105,
486 EF_AVR_ARCH_XMEGA6 = 106,
487 EF_AVR_ARCH_XMEGA7 = 107
488 };
489
490 // ELF Relocation types for AVR
491 enum {
492 #include "ELFRelocs/AVR.def"
493 };
494
495 // Mips Specific e_flags
496 enum : unsigned {
497 EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions
498 EF_MIPS_PIC = 0x00000002, // Position independent code
499 EF_MIPS_CPIC = 0x00000004, // Call object with Position independent code
500 EF_MIPS_ABI2 = 0x00000020, // File uses N32 ABI
501 EF_MIPS_32BITMODE = 0x00000100, // Code compiled for a 64-bit machine
502 // in 32-bit mode
503 EF_MIPS_FP64 = 0x00000200, // Code compiled for a 32-bit machine
504 // but uses 64-bit FP registers
505 EF_MIPS_NAN2008 = 0x00000400, // Uses IEE 754-2008 NaN encoding
506
507 // ABI flags
508 EF_MIPS_ABI_O32 = 0x00001000, // This file follows the first MIPS 32 bit ABI
509 EF_MIPS_ABI_O64 = 0x00002000, // O32 ABI extended for 64-bit architecture.
510 EF_MIPS_ABI_EABI32 = 0x00003000, // EABI in 32 bit mode.
511 EF_MIPS_ABI_EABI64 = 0x00004000, // EABI in 64 bit mode.
512 EF_MIPS_ABI = 0x0000f000, // Mask for selecting EF_MIPS_ABI_ variant.
513
514 // MIPS machine variant
515 EF_MIPS_MACH_NONE = 0x00000000, // A standard MIPS implementation.
516 EF_MIPS_MACH_3900 = 0x00810000, // Toshiba R3900
517 EF_MIPS_MACH_4010 = 0x00820000, // LSI R4010
518 EF_MIPS_MACH_4100 = 0x00830000, // NEC VR4100
519 EF_MIPS_MACH_4650 = 0x00850000, // MIPS R4650
520 EF_MIPS_MACH_4120 = 0x00870000, // NEC VR4120
521 EF_MIPS_MACH_4111 = 0x00880000, // NEC VR4111/VR4181
522 EF_MIPS_MACH_SB1 = 0x008a0000, // Broadcom SB-1
523 EF_MIPS_MACH_OCTEON = 0x008b0000, // Cavium Networks Octeon
524 EF_MIPS_MACH_XLR = 0x008c0000, // RMI Xlr
525 EF_MIPS_MACH_OCTEON2 = 0x008d0000, // Cavium Networks Octeon2
526 EF_MIPS_MACH_OCTEON3 = 0x008e0000, // Cavium Networks Octeon3
527 EF_MIPS_MACH_5400 = 0x00910000, // NEC VR5400
528 EF_MIPS_MACH_5900 = 0x00920000, // MIPS R5900
529 EF_MIPS_MACH_5500 = 0x00980000, // NEC VR5500
530 EF_MIPS_MACH_9000 = 0x00990000, // Unknown
531 EF_MIPS_MACH_LS2E = 0x00a00000, // ST Microelectronics Loongson 2E
532 EF_MIPS_MACH_LS2F = 0x00a10000, // ST Microelectronics Loongson 2F
533 EF_MIPS_MACH_LS3A = 0x00a20000, // Loongson 3A
534 EF_MIPS_MACH = 0x00ff0000, // EF_MIPS_MACH_xxx selection mask
535
536 // ARCH_ASE
537 EF_MIPS_MICROMIPS = 0x02000000, // microMIPS
538 EF_MIPS_ARCH_ASE_M16 = 0x04000000, // Has Mips-16 ISA extensions
539 EF_MIPS_ARCH_ASE_MDMX = 0x08000000, // Has MDMX multimedia extensions
540 EF_MIPS_ARCH_ASE = 0x0f000000, // Mask for EF_MIPS_ARCH_ASE_xxx flags
541
542 // ARCH
543 EF_MIPS_ARCH_1 = 0x00000000, // MIPS1 instruction set
544 EF_MIPS_ARCH_2 = 0x10000000, // MIPS2 instruction set
545 EF_MIPS_ARCH_3 = 0x20000000, // MIPS3 instruction set
546 EF_MIPS_ARCH_4 = 0x30000000, // MIPS4 instruction set
547 EF_MIPS_ARCH_5 = 0x40000000, // MIPS5 instruction set
548 EF_MIPS_ARCH_32 = 0x50000000, // MIPS32 instruction set per linux not elf.h
549 EF_MIPS_ARCH_64 = 0x60000000, // MIPS64 instruction set per linux not elf.h
550 EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2, mips32r3, mips32r5
551 EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2, mips64r3, mips64r5
552 EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6
553 EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6
554 EF_MIPS_ARCH = 0xf0000000 // Mask for applying EF_MIPS_ARCH_ variant
555 };
556
557 // ELF Relocation types for Mips
558 enum {
559 #include "ELFRelocs/Mips.def"
560 };
561
562 // Special values for the st_other field in the symbol table entry for MIPS.
563 enum {
564 STO_MIPS_OPTIONAL = 0x04, // Symbol whose definition is optional
565 STO_MIPS_PLT = 0x08, // PLT entry related dynamic table record
566 STO_MIPS_PIC = 0x20, // PIC func in an object mixes PIC/non-PIC
567 STO_MIPS_MICROMIPS = 0x80, // MIPS Specific ISA for MicroMips
568 STO_MIPS_MIPS16 = 0xf0 // MIPS Specific ISA for Mips16
569 };
570
571 // .MIPS.options section descriptor kinds
572 enum {
573 ODK_NULL = 0, // Undefined
574 ODK_REGINFO = 1, // Register usage information
575 ODK_EXCEPTIONS = 2, // Exception processing options
576 ODK_PAD = 3, // Section padding options
577 ODK_HWPATCH = 4, // Hardware patches applied
578 ODK_FILL = 5, // Linker fill value
579 ODK_TAGS = 6, // Space for tool identification
580 ODK_HWAND = 7, // Hardware AND patches applied
581 ODK_HWOR = 8, // Hardware OR patches applied
582 ODK_GP_GROUP = 9, // GP group to use for text/data sections
583 ODK_IDENT = 10, // ID information
584 ODK_PAGESIZE = 11 // Page size information
585 };
586
587 // Hexagon-specific e_flags
588 enum {
589 // Object processor version flags, bits[11:0]
590 EF_HEXAGON_MACH_V2 = 0x00000001, // Hexagon V2
591 EF_HEXAGON_MACH_V3 = 0x00000002, // Hexagon V3
592 EF_HEXAGON_MACH_V4 = 0x00000003, // Hexagon V4
593 EF_HEXAGON_MACH_V5 = 0x00000004, // Hexagon V5
594 EF_HEXAGON_MACH_V55 = 0x00000005, // Hexagon V55
595 EF_HEXAGON_MACH_V60 = 0x00000060, // Hexagon V60
596 EF_HEXAGON_MACH_V62 = 0x00000062, // Hexagon V62
597 EF_HEXAGON_MACH_V65 = 0x00000065, // Hexagon V65
598 EF_HEXAGON_MACH_V66 = 0x00000066, // Hexagon V66
599 EF_HEXAGON_MACH_V67 = 0x00000067, // Hexagon V67
600 EF_HEXAGON_MACH_V67T = 0x00008067, // Hexagon V67T
601
602 // Highest ISA version flags
603 EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[11:0]
604 // of e_flags
605 EF_HEXAGON_ISA_V2 = 0x00000010, // Hexagon V2 ISA
606 EF_HEXAGON_ISA_V3 = 0x00000020, // Hexagon V3 ISA
607 EF_HEXAGON_ISA_V4 = 0x00000030, // Hexagon V4 ISA
608 EF_HEXAGON_ISA_V5 = 0x00000040, // Hexagon V5 ISA
609 EF_HEXAGON_ISA_V55 = 0x00000050, // Hexagon V55 ISA
610 EF_HEXAGON_ISA_V60 = 0x00000060, // Hexagon V60 ISA
611 EF_HEXAGON_ISA_V62 = 0x00000062, // Hexagon V62 ISA
612 EF_HEXAGON_ISA_V65 = 0x00000065, // Hexagon V65 ISA
613 EF_HEXAGON_ISA_V66 = 0x00000066, // Hexagon V66 ISA
614 EF_HEXAGON_ISA_V67 = 0x00000067, // Hexagon V67 ISA
615 };
616
617 // Hexagon-specific section indexes for common small data
618 enum {
619 SHN_HEXAGON_SCOMMON = 0xff00, // Other access sizes
620 SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access
621 SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access
622 SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access
623 SHN_HEXAGON_SCOMMON_8 = 0xff04 // Double-word-size access
624 };
625
626 // ELF Relocation types for Hexagon
627 enum {
628 #include "ELFRelocs/Hexagon.def"
629 };
630
631 // ELF Relocation type for Lanai.
632 enum {
633 #include "ELFRelocs/Lanai.def"
634 };
635
636 // RISCV Specific e_flags
637 enum : unsigned {
638 EF_RISCV_RVC = 0x0001,
639 EF_RISCV_FLOAT_ABI = 0x0006,
640 EF_RISCV_FLOAT_ABI_SOFT = 0x0000,
641 EF_RISCV_FLOAT_ABI_SINGLE = 0x0002,
642 EF_RISCV_FLOAT_ABI_DOUBLE = 0x0004,
643 EF_RISCV_FLOAT_ABI_QUAD = 0x0006,
644 EF_RISCV_RVE = 0x0008
645 };
646
647 // ELF Relocation types for RISC-V
648 enum {
649 #include "ELFRelocs/RISCV.def"
650 };
651
652 // ELF Relocation types for S390/zSeries
653 enum {
654 #include "ELFRelocs/SystemZ.def"
655 };
656
657 // ELF Relocation type for Sparc.
658 enum {
659 #include "ELFRelocs/Sparc.def"
660 };
661
662 // AMDGPU specific e_flags.
663 enum : unsigned {
664 // Processor selection mask for EF_AMDGPU_MACH_* values.
665 EF_AMDGPU_MACH = 0x0ff,
666
667 // Not specified processor.
668 EF_AMDGPU_MACH_NONE = 0x000,
669
670 // R600-based processors.
671
672 // Radeon HD 2000/3000 Series (R600).
673 EF_AMDGPU_MACH_R600_R600 = 0x001,
674 EF_AMDGPU_MACH_R600_R630 = 0x002,
675 EF_AMDGPU_MACH_R600_RS880 = 0x003,
676 EF_AMDGPU_MACH_R600_RV670 = 0x004,
677 // Radeon HD 4000 Series (R700).
678 EF_AMDGPU_MACH_R600_RV710 = 0x005,
679 EF_AMDGPU_MACH_R600_RV730 = 0x006,
680 EF_AMDGPU_MACH_R600_RV770 = 0x007,
681 // Radeon HD 5000 Series (Evergreen).
682 EF_AMDGPU_MACH_R600_CEDAR = 0x008,
683 EF_AMDGPU_MACH_R600_CYPRESS = 0x009,
684 EF_AMDGPU_MACH_R600_JUNIPER = 0x00a,
685 EF_AMDGPU_MACH_R600_REDWOOD = 0x00b,
686 EF_AMDGPU_MACH_R600_SUMO = 0x00c,
687 // Radeon HD 6000 Series (Northern Islands).
688 EF_AMDGPU_MACH_R600_BARTS = 0x00d,
689 EF_AMDGPU_MACH_R600_CAICOS = 0x00e,
690 EF_AMDGPU_MACH_R600_CAYMAN = 0x00f,
691 EF_AMDGPU_MACH_R600_TURKS = 0x010,
692
693 // Reserved for R600-based processors.
694 EF_AMDGPU_MACH_R600_RESERVED_FIRST = 0x011,
695 EF_AMDGPU_MACH_R600_RESERVED_LAST = 0x01f,
696
697 // First/last R600-based processors.
698 EF_AMDGPU_MACH_R600_FIRST = EF_AMDGPU_MACH_R600_R600,
699 EF_AMDGPU_MACH_R600_LAST = EF_AMDGPU_MACH_R600_TURKS,
700
701 // AMDGCN-based processors.
702 EF_AMDGPU_MACH_AMDGCN_GFX600 = 0x020,
703 EF_AMDGPU_MACH_AMDGCN_GFX601 = 0x021,
704 EF_AMDGPU_MACH_AMDGCN_GFX700 = 0x022,
705 EF_AMDGPU_MACH_AMDGCN_GFX701 = 0x023,
706 EF_AMDGPU_MACH_AMDGCN_GFX702 = 0x024,
707 EF_AMDGPU_MACH_AMDGCN_GFX703 = 0x025,
708 EF_AMDGPU_MACH_AMDGCN_GFX704 = 0x026,
709 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X27 = 0x027,
710 EF_AMDGPU_MACH_AMDGCN_GFX801 = 0x028,
711 EF_AMDGPU_MACH_AMDGCN_GFX802 = 0x029,
712 EF_AMDGPU_MACH_AMDGCN_GFX803 = 0x02a,
713 EF_AMDGPU_MACH_AMDGCN_GFX810 = 0x02b,
714 EF_AMDGPU_MACH_AMDGCN_GFX900 = 0x02c,
715 EF_AMDGPU_MACH_AMDGCN_GFX902 = 0x02d,
716 EF_AMDGPU_MACH_AMDGCN_GFX904 = 0x02e,
717 EF_AMDGPU_MACH_AMDGCN_GFX906 = 0x02f,
718 EF_AMDGPU_MACH_AMDGCN_GFX908 = 0x030,
719 EF_AMDGPU_MACH_AMDGCN_GFX909 = 0x031,
720 EF_AMDGPU_MACH_AMDGCN_GFX90C = 0x032,
721 EF_AMDGPU_MACH_AMDGCN_GFX1010 = 0x033,
722 EF_AMDGPU_MACH_AMDGCN_GFX1011 = 0x034,
723 EF_AMDGPU_MACH_AMDGCN_GFX1012 = 0x035,
724 EF_AMDGPU_MACH_AMDGCN_GFX1030 = 0x036,
725 EF_AMDGPU_MACH_AMDGCN_GFX1031 = 0x037,
726 EF_AMDGPU_MACH_AMDGCN_GFX1032 = 0x038,
727 EF_AMDGPU_MACH_AMDGCN_GFX1033 = 0x039,
728 EF_AMDGPU_MACH_AMDGCN_GFX602 = 0x03a,
729 EF_AMDGPU_MACH_AMDGCN_GFX705 = 0x03b,
730 EF_AMDGPU_MACH_AMDGCN_GFX805 = 0x03c,
731
732 // First/last AMDGCN-based processors.
733 EF_AMDGPU_MACH_AMDGCN_FIRST = EF_AMDGPU_MACH_AMDGCN_GFX600,
734 EF_AMDGPU_MACH_AMDGCN_LAST = EF_AMDGPU_MACH_AMDGCN_GFX805,
735
736 // Indicates if the "xnack" target feature is enabled for all code contained
737 // in the object.
738 EF_AMDGPU_XNACK = 0x100,
739 // Indicates if the "sram-ecc" target feature is enabled for all code
740 // contained in the object.
741 EF_AMDGPU_SRAM_ECC = 0x200,
742 };
743
744 // ELF Relocation types for AMDGPU
745 enum {
746 #include "ELFRelocs/AMDGPU.def"
747 };
748
749 // ELF Relocation types for BPF
750 enum {
751 #include "ELFRelocs/BPF.def"
752 };
753
754 // MSP430 specific e_flags
755 enum : unsigned {
756 EF_MSP430_MACH_MSP430x11 = 11,
757 EF_MSP430_MACH_MSP430x11x1 = 110,
758 EF_MSP430_MACH_MSP430x12 = 12,
759 EF_MSP430_MACH_MSP430x13 = 13,
760 EF_MSP430_MACH_MSP430x14 = 14,
761 EF_MSP430_MACH_MSP430x15 = 15,
762 EF_MSP430_MACH_MSP430x16 = 16,
763 EF_MSP430_MACH_MSP430x20 = 20,
764 EF_MSP430_MACH_MSP430x22 = 22,
765 EF_MSP430_MACH_MSP430x23 = 23,
766 EF_MSP430_MACH_MSP430x24 = 24,
767 EF_MSP430_MACH_MSP430x26 = 26,
768 EF_MSP430_MACH_MSP430x31 = 31,
769 EF_MSP430_MACH_MSP430x32 = 32,
770 EF_MSP430_MACH_MSP430x33 = 33,
771 EF_MSP430_MACH_MSP430x41 = 41,
772 EF_MSP430_MACH_MSP430x42 = 42,
773 EF_MSP430_MACH_MSP430x43 = 43,
774 EF_MSP430_MACH_MSP430x44 = 44,
775 EF_MSP430_MACH_MSP430X = 45,
776 EF_MSP430_MACH_MSP430x46 = 46,
777 EF_MSP430_MACH_MSP430x47 = 47,
778 EF_MSP430_MACH_MSP430x54 = 54,
779 };
780
781 // ELF Relocation types for MSP430
782 enum {
783 #include "ELFRelocs/MSP430.def"
784 };
785
786 // ELF Relocation type for VE.
787 enum {
788 #include "ELFRelocs/VE.def"
789 };
790
791
792 // ELF Relocation types for CSKY
793 enum {
794 #include "ELFRelocs/CSKY.def"
795 };
796
797 #undef ELF_RELOC
798
799 // Section header.
800 struct Elf32_Shdr {
801 Elf32_Word sh_name; // Section name (index into string table)
802 Elf32_Word sh_type; // Section type (SHT_*)
803 Elf32_Word sh_flags; // Section flags (SHF_*)
804 Elf32_Addr sh_addr; // Address where section is to be loaded
805 Elf32_Off sh_offset; // File offset of section data, in bytes
806 Elf32_Word sh_size; // Size of section, in bytes
807 Elf32_Word sh_link; // Section type-specific header table index link
808 Elf32_Word sh_info; // Section type-specific extra information
809 Elf32_Word sh_addralign; // Section address alignment
810 Elf32_Word sh_entsize; // Size of records contained within the section
811 };
812
813 // Section header for ELF64 - same fields as ELF32, different types.
814 struct Elf64_Shdr {
815 Elf64_Word sh_name;
816 Elf64_Word sh_type;
817 Elf64_Xword sh_flags;
818 Elf64_Addr sh_addr;
819 Elf64_Off sh_offset;
820 Elf64_Xword sh_size;
821 Elf64_Word sh_link;
822 Elf64_Word sh_info;
823 Elf64_Xword sh_addralign;
824 Elf64_Xword sh_entsize;
825 };
826
827 // Special section indices.
828 enum {
829 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless
830 SHN_LORESERVE = 0xff00, // Lowest reserved index
831 SHN_LOPROC = 0xff00, // Lowest processor-specific index
832 SHN_HIPROC = 0xff1f, // Highest processor-specific index
833 SHN_LOOS = 0xff20, // Lowest operating system-specific index
834 SHN_HIOS = 0xff3f, // Highest operating system-specific index
835 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation
836 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables
837 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE
838 SHN_HIRESERVE = 0xffff // Highest reserved index
839 };
840
841 // Section types.
842 enum : unsigned {
843 SHT_NULL = 0, // No associated section (inactive entry).
844 SHT_PROGBITS = 1, // Program-defined contents.
845 SHT_SYMTAB = 2, // Symbol table.
846 SHT_STRTAB = 3, // String table.
847 SHT_RELA = 4, // Relocation entries; explicit addends.
848 SHT_HASH = 5, // Symbol hash table.
849 SHT_DYNAMIC = 6, // Information for dynamic linking.
850 SHT_NOTE = 7, // Information about the file.
851 SHT_NOBITS = 8, // Data occupies no space in the file.
852 SHT_REL = 9, // Relocation entries; no explicit addends.
853 SHT_SHLIB = 10, // Reserved.
854 SHT_DYNSYM = 11, // Symbol table.
855 SHT_INIT_ARRAY = 14, // Pointers to initialization functions.
856 SHT_FINI_ARRAY = 15, // Pointers to termination functions.
857 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions.
858 SHT_GROUP = 17, // Section group.
859 SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries.
860 // Experimental support for SHT_RELR sections. For details, see proposal
861 // at https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg
862 SHT_RELR = 19, // Relocation entries; only offsets.
863 SHT_LOOS = 0x60000000, // Lowest operating system-specific type.
864 // Android packed relocation section types.
865 // https://android.googlesource.com/platform/bionic/+/6f12bfece5dcc01325e0abba56a46b1bcf991c69/tools/relocation_packer/src/elf_file.cc#37
866 SHT_ANDROID_REL = 0x60000001,
867 SHT_ANDROID_RELA = 0x60000002,
868 SHT_LLVM_ODRTAB = 0x6fff4c00, // LLVM ODR table.
869 SHT_LLVM_LINKER_OPTIONS = 0x6fff4c01, // LLVM Linker Options.
870 SHT_LLVM_CALL_GRAPH_PROFILE = 0x6fff4c02, // LLVM Call Graph Profile.
871 SHT_LLVM_ADDRSIG = 0x6fff4c03, // List of address-significant symbols
872 // for safe ICF.
873 SHT_LLVM_DEPENDENT_LIBRARIES =
874 0x6fff4c04, // LLVM Dependent Library Specifiers.
875 SHT_LLVM_SYMPART = 0x6fff4c05, // Symbol partition specification.
876 SHT_LLVM_PART_EHDR = 0x6fff4c06, // ELF header for loadable partition.
877 SHT_LLVM_PART_PHDR = 0x6fff4c07, // Phdrs for loadable partition.
878 SHT_LLVM_BB_ADDR_MAP = 0x6fff4c08, // LLVM Basic Block Address Map.
879 // Android's experimental support for SHT_RELR sections.
880 // https://android.googlesource.com/platform/bionic/+/b7feec74547f84559a1467aca02708ff61346d2a/libc/include/elf.h#512
881 SHT_ANDROID_RELR = 0x6fffff00, // Relocation entries; only offsets.
882 SHT_GNU_ATTRIBUTES = 0x6ffffff5, // Object attributes.
883 SHT_GNU_HASH = 0x6ffffff6, // GNU-style hash table.
884 SHT_GNU_verdef = 0x6ffffffd, // GNU version definitions.
885 SHT_GNU_verneed = 0x6ffffffe, // GNU version references.
886 SHT_GNU_versym = 0x6fffffff, // GNU symbol versions table.
887 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type.
888 SHT_LOPROC = 0x70000000, // Lowest processor arch-specific type.
889 // Fixme: All this is duplicated in MCSectionELF. Why??
890 // Exception Index table
891 SHT_ARM_EXIDX = 0x70000001U,
892 // BPABI DLL dynamic linking pre-emption map
893 SHT_ARM_PREEMPTMAP = 0x70000002U,
894 // Object file compatibility attributes
895 SHT_ARM_ATTRIBUTES = 0x70000003U,
896 SHT_ARM_DEBUGOVERLAY = 0x70000004U,
897 SHT_ARM_OVERLAYSECTION = 0x70000005U,
898 SHT_HEX_ORDERED = 0x70000000, // Link editor is to sort the entries in
899 // this section based on their sizes
900 SHT_X86_64_UNWIND = 0x70000001, // Unwind information
901
902 SHT_MIPS_REGINFO = 0x70000006, // Register usage information
903 SHT_MIPS_OPTIONS = 0x7000000d, // General options
904 SHT_MIPS_DWARF = 0x7000001e, // DWARF debugging section.
905 SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information.
906
907 SHT_MSP430_ATTRIBUTES = 0x70000003U,
908
909 SHT_RISCV_ATTRIBUTES = 0x70000003U,
910
911 SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type.
912 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
913 SHT_HIUSER = 0xffffffff // Highest type reserved for applications.
914 };
915
916 // Section flags.
917 enum : unsigned {
918 // Section data should be writable during execution.
919 SHF_WRITE = 0x1,
920
921 // Section occupies memory during program execution.
922 SHF_ALLOC = 0x2,
923
924 // Section contains executable machine instructions.
925 SHF_EXECINSTR = 0x4,
926
927 // The data in this section may be merged.
928 SHF_MERGE = 0x10,
929
930 // The data in this section is null-terminated strings.
931 SHF_STRINGS = 0x20,
932
933 // A field in this section holds a section header table index.
934 SHF_INFO_LINK = 0x40U,
935
936 // Adds special ordering requirements for link editors.
937 SHF_LINK_ORDER = 0x80U,
938
939 // This section requires special OS-specific processing to avoid incorrect
940 // behavior.
941 SHF_OS_NONCONFORMING = 0x100U,
942
943 // This section is a member of a section group.
944 SHF_GROUP = 0x200U,
945
946 // This section holds Thread-Local Storage.
947 SHF_TLS = 0x400U,
948
949 // Identifies a section containing compressed data.
950 SHF_COMPRESSED = 0x800U,
951
952 // This section is excluded from the final executable or shared library.
953 SHF_EXCLUDE = 0x80000000U,
954
955 // Start of target-specific flags.
956
957 SHF_MASKOS = 0x0ff00000,
958
959 // Bits indicating processor-specific flags.
960 SHF_MASKPROC = 0xf0000000,
961
962 /// All sections with the "d" flag are grouped together by the linker to form
963 /// the data section and the dp register is set to the start of the section by
964 /// the boot code.
965 XCORE_SHF_DP_SECTION = 0x10000000,
966
967 /// All sections with the "c" flag are grouped together by the linker to form
968 /// the constant pool and the cp register is set to the start of the constant
969 /// pool by the boot code.
970 XCORE_SHF_CP_SECTION = 0x20000000,
971
972 // If an object file section does not have this flag set, then it may not hold
973 // more than 2GB and can be freely referred to in objects using smaller code
974 // models. Otherwise, only objects using larger code models can refer to them.
975 // For example, a medium code model object can refer to data in a section that
976 // sets this flag besides being able to refer to data in a section that does
977 // not set it; likewise, a small code model object can refer only to code in a
978 // section that does not set this flag.
979 SHF_X86_64_LARGE = 0x10000000,
980
981 // All sections with the GPREL flag are grouped into a global data area
982 // for faster accesses
983 SHF_HEX_GPREL = 0x10000000,
984
985 // Section contains text/data which may be replicated in other sections.
986 // Linker must retain only one copy.
987 SHF_MIPS_NODUPES = 0x01000000,
988
989 // Linker must generate implicit hidden weak names.
990 SHF_MIPS_NAMES = 0x02000000,
991
992 // Section data local to process.
993 SHF_MIPS_LOCAL = 0x04000000,
994
995 // Do not strip this section.
996 SHF_MIPS_NOSTRIP = 0x08000000,
997
998 // Section must be part of global data area.
999 SHF_MIPS_GPREL = 0x10000000,
1000
1001 // This section should be merged.
1002 SHF_MIPS_MERGE = 0x20000000,
1003
1004 // Address size to be inferred from section entry size.
1005 SHF_MIPS_ADDR = 0x40000000,
1006
1007 // Section data is string data by default.
1008 SHF_MIPS_STRING = 0x80000000,
1009
1010 // Make code section unreadable when in execute-only mode
1011 SHF_ARM_PURECODE = 0x20000000
1012 };
1013
1014 // Section Group Flags
1015 enum : unsigned {
1016 GRP_COMDAT = 0x1,
1017 GRP_MASKOS = 0x0ff00000,
1018 GRP_MASKPROC = 0xf0000000
1019 };
1020
1021 // Symbol table entries for ELF32.
1022 struct Elf32_Sym {
1023 Elf32_Word st_name; // Symbol name (index into string table)
1024 Elf32_Addr st_value; // Value or address associated with the symbol
1025 Elf32_Word st_size; // Size of the symbol
1026 unsigned char st_info; // Symbol's type and binding attributes
1027 unsigned char st_other; // Must be zero; reserved
1028 Elf32_Half st_shndx; // Which section (header table index) it's defined in
1029
1030 // These accessors and mutators correspond to the ELF32_ST_BIND,
1031 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
getBindingElf32_Sym1032 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf32_Sym1033 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf32_Sym1034 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf32_Sym1035 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf32_Sym1036 void setBindingAndType(unsigned char b, unsigned char t) {
1037 st_info = (b << 4) + (t & 0x0f);
1038 }
1039 };
1040
1041 // Symbol table entries for ELF64.
1042 struct Elf64_Sym {
1043 Elf64_Word st_name; // Symbol name (index into string table)
1044 unsigned char st_info; // Symbol's type and binding attributes
1045 unsigned char st_other; // Must be zero; reserved
1046 Elf64_Half st_shndx; // Which section (header tbl index) it's defined in
1047 Elf64_Addr st_value; // Value or address associated with the symbol
1048 Elf64_Xword st_size; // Size of the symbol
1049
1050 // These accessors and mutators are identical to those defined for ELF32
1051 // symbol table entries.
getBindingElf64_Sym1052 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf64_Sym1053 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf64_Sym1054 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf64_Sym1055 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf64_Sym1056 void setBindingAndType(unsigned char b, unsigned char t) {
1057 st_info = (b << 4) + (t & 0x0f);
1058 }
1059 };
1060
1061 // The size (in bytes) of symbol table entries.
1062 enum {
1063 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
1064 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size.
1065 };
1066
1067 // Symbol bindings.
1068 enum {
1069 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def
1070 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined
1071 STB_WEAK = 2, // Weak symbol, like global but lower-precedence
1072 STB_GNU_UNIQUE = 10,
1073 STB_LOOS = 10, // Lowest operating system-specific binding type
1074 STB_HIOS = 12, // Highest operating system-specific binding type
1075 STB_LOPROC = 13, // Lowest processor-specific binding type
1076 STB_HIPROC = 15 // Highest processor-specific binding type
1077 };
1078
1079 // Symbol types.
1080 enum {
1081 STT_NOTYPE = 0, // Symbol's type is not specified
1082 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.)
1083 STT_FUNC = 2, // Symbol is executable code (function, etc.)
1084 STT_SECTION = 3, // Symbol refers to a section
1085 STT_FILE = 4, // Local, absolute symbol that refers to a file
1086 STT_COMMON = 5, // An uninitialized common block
1087 STT_TLS = 6, // Thread local data object
1088 STT_GNU_IFUNC = 10, // GNU indirect function
1089 STT_LOOS = 10, // Lowest operating system-specific symbol type
1090 STT_HIOS = 12, // Highest operating system-specific symbol type
1091 STT_LOPROC = 13, // Lowest processor-specific symbol type
1092 STT_HIPROC = 15, // Highest processor-specific symbol type
1093
1094 // AMDGPU symbol types
1095 STT_AMDGPU_HSA_KERNEL = 10
1096 };
1097
1098 enum {
1099 STV_DEFAULT = 0, // Visibility is specified by binding type
1100 STV_INTERNAL = 1, // Defined by processor supplements
1101 STV_HIDDEN = 2, // Not visible to other components
1102 STV_PROTECTED = 3 // Visible in other components but not preemptable
1103 };
1104
1105 // Symbol number.
1106 enum { STN_UNDEF = 0 };
1107
1108 // Special relocation symbols used in the MIPS64 ELF relocation entries
1109 enum {
1110 RSS_UNDEF = 0, // None
1111 RSS_GP = 1, // Value of gp
1112 RSS_GP0 = 2, // Value of gp used to create object being relocated
1113 RSS_LOC = 3 // Address of location being relocated
1114 };
1115
1116 // Relocation entry, without explicit addend.
1117 struct Elf32_Rel {
1118 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
1119 Elf32_Word r_info; // Symbol table index and type of relocation to apply
1120
1121 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1122 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rel1123 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rel1124 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
setSymbolElf32_Rel1125 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rel1126 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rel1127 void setSymbolAndType(Elf32_Word s, unsigned char t) {
1128 r_info = (s << 8) + t;
1129 }
1130 };
1131
1132 // Relocation entry with explicit addend.
1133 struct Elf32_Rela {
1134 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
1135 Elf32_Word r_info; // Symbol table index and type of relocation to apply
1136 Elf32_Sword r_addend; // Compute value for relocatable field by adding this
1137
1138 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1139 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rela1140 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rela1141 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
setSymbolElf32_Rela1142 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rela1143 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rela1144 void setSymbolAndType(Elf32_Word s, unsigned char t) {
1145 r_info = (s << 8) + t;
1146 }
1147 };
1148
1149 // Relocation entry without explicit addend or info (relative relocations only).
1150 typedef Elf32_Word Elf32_Relr; // offset/bitmap for relative relocations
1151
1152 // Relocation entry, without explicit addend.
1153 struct Elf64_Rel {
1154 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
1155 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
1156
1157 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1158 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rel1159 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rel1160 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
setSymbolElf64_Rel1161 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rel1162 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rel1163 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1164 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
1165 }
1166 };
1167
1168 // Relocation entry with explicit addend.
1169 struct Elf64_Rela {
1170 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
1171 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
1172 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this.
1173
1174 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1175 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rela1176 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rela1177 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
setSymbolElf64_Rela1178 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rela1179 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rela1180 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1181 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
1182 }
1183 };
1184
1185 // Relocation entry without explicit addend or info (relative relocations only).
1186 typedef Elf64_Xword Elf64_Relr; // offset/bitmap for relative relocations
1187
1188 // Program header for ELF32.
1189 struct Elf32_Phdr {
1190 Elf32_Word p_type; // Type of segment
1191 Elf32_Off p_offset; // File offset where segment is located, in bytes
1192 Elf32_Addr p_vaddr; // Virtual address of beginning of segment
1193 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
1194 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
1195 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
1196 Elf32_Word p_flags; // Segment flags
1197 Elf32_Word p_align; // Segment alignment constraint
1198 };
1199
1200 // Program header for ELF64.
1201 struct Elf64_Phdr {
1202 Elf64_Word p_type; // Type of segment
1203 Elf64_Word p_flags; // Segment flags
1204 Elf64_Off p_offset; // File offset where segment is located, in bytes
1205 Elf64_Addr p_vaddr; // Virtual address of beginning of segment
1206 Elf64_Addr p_paddr; // Physical addr of beginning of segment (OS-specific)
1207 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero)
1208 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero)
1209 Elf64_Xword p_align; // Segment alignment constraint
1210 };
1211
1212 // Segment types.
1213 enum {
1214 PT_NULL = 0, // Unused segment.
1215 PT_LOAD = 1, // Loadable segment.
1216 PT_DYNAMIC = 2, // Dynamic linking information.
1217 PT_INTERP = 3, // Interpreter pathname.
1218 PT_NOTE = 4, // Auxiliary information.
1219 PT_SHLIB = 5, // Reserved.
1220 PT_PHDR = 6, // The program header table itself.
1221 PT_TLS = 7, // The thread-local storage template.
1222 PT_LOOS = 0x60000000, // Lowest operating system-specific pt entry type.
1223 PT_HIOS = 0x6fffffff, // Highest operating system-specific pt entry type.
1224 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
1225 PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type.
1226
1227 // x86-64 program header types.
1228 // These all contain stack unwind tables.
1229 PT_GNU_EH_FRAME = 0x6474e550,
1230 PT_SUNW_EH_FRAME = 0x6474e550,
1231 PT_SUNW_UNWIND = 0x6464e550,
1232
1233 PT_GNU_STACK = 0x6474e551, // Indicates stack executability.
1234 PT_GNU_RELRO = 0x6474e552, // Read-only after relocation.
1235 PT_GNU_PROPERTY = 0x6474e553, // .note.gnu.property notes sections.
1236
1237 PT_OPENBSD_RANDOMIZE = 0x65a3dbe6, // Fill with random data.
1238 PT_OPENBSD_WXNEEDED = 0x65a3dbe7, // Program does W^X violations.
1239 PT_OPENBSD_BOOTDATA = 0x65a41be6, // Section for boot arguments.
1240
1241 // ARM program header types.
1242 PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info
1243 // These all contain stack unwind tables.
1244 PT_ARM_EXIDX = 0x70000001,
1245 PT_ARM_UNWIND = 0x70000001,
1246
1247 // MIPS program header types.
1248 PT_MIPS_REGINFO = 0x70000000, // Register usage information.
1249 PT_MIPS_RTPROC = 0x70000001, // Runtime procedure table.
1250 PT_MIPS_OPTIONS = 0x70000002, // Options segment.
1251 PT_MIPS_ABIFLAGS = 0x70000003, // Abiflags segment.
1252 };
1253
1254 // Segment flag bits.
1255 enum : unsigned {
1256 PF_X = 1, // Execute
1257 PF_W = 2, // Write
1258 PF_R = 4, // Read
1259 PF_MASKOS = 0x0ff00000, // Bits for operating system-specific semantics.
1260 PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics.
1261 };
1262
1263 // Dynamic table entry for ELF32.
1264 struct Elf32_Dyn {
1265 Elf32_Sword d_tag; // Type of dynamic table entry.
1266 union {
1267 Elf32_Word d_val; // Integer value of entry.
1268 Elf32_Addr d_ptr; // Pointer value of entry.
1269 } d_un;
1270 };
1271
1272 // Dynamic table entry for ELF64.
1273 struct Elf64_Dyn {
1274 Elf64_Sxword d_tag; // Type of dynamic table entry.
1275 union {
1276 Elf64_Xword d_val; // Integer value of entry.
1277 Elf64_Addr d_ptr; // Pointer value of entry.
1278 } d_un;
1279 };
1280
1281 // Dynamic table entry tags.
1282 enum {
1283 #define DYNAMIC_TAG(name, value) DT_##name = value,
1284 #include "DynamicTags.def"
1285 #undef DYNAMIC_TAG
1286 };
1287
1288 // DT_FLAGS values.
1289 enum {
1290 DF_ORIGIN = 0x01, // The object may reference $ORIGIN.
1291 DF_SYMBOLIC = 0x02, // Search the shared lib before searching the exe.
1292 DF_TEXTREL = 0x04, // Relocations may modify a non-writable segment.
1293 DF_BIND_NOW = 0x08, // Process all relocations on load.
1294 DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically.
1295 };
1296
1297 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry.
1298 enum {
1299 DF_1_NOW = 0x00000001, // Set RTLD_NOW for this object.
1300 DF_1_GLOBAL = 0x00000002, // Set RTLD_GLOBAL for this object.
1301 DF_1_GROUP = 0x00000004, // Set RTLD_GROUP for this object.
1302 DF_1_NODELETE = 0x00000008, // Set RTLD_NODELETE for this object.
1303 DF_1_LOADFLTR = 0x00000010, // Trigger filtee loading at runtime.
1304 DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object.
1305 DF_1_NOOPEN = 0x00000040, // Set RTLD_NOOPEN for this object.
1306 DF_1_ORIGIN = 0x00000080, // $ORIGIN must be handled.
1307 DF_1_DIRECT = 0x00000100, // Direct binding enabled.
1308 DF_1_TRANS = 0x00000200,
1309 DF_1_INTERPOSE = 0x00000400, // Object is used to interpose.
1310 DF_1_NODEFLIB = 0x00000800, // Ignore default lib search path.
1311 DF_1_NODUMP = 0x00001000, // Object can't be dldump'ed.
1312 DF_1_CONFALT = 0x00002000, // Configuration alternative created.
1313 DF_1_ENDFILTEE = 0x00004000, // Filtee terminates filters search.
1314 DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time.
1315 DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time.
1316 DF_1_NODIRECT = 0x00020000, // Object has no-direct binding.
1317 DF_1_IGNMULDEF = 0x00040000,
1318 DF_1_NOKSYMS = 0x00080000,
1319 DF_1_NOHDR = 0x00100000,
1320 DF_1_EDITED = 0x00200000, // Object is modified after built.
1321 DF_1_NORELOC = 0x00400000,
1322 DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers.
1323 DF_1_GLOBAUDIT = 0x01000000, // Global auditing required.
1324 DF_1_SINGLETON = 0x02000000, // Singleton symbols are used.
1325 DF_1_PIE = 0x08000000, // Object is a position-independent executable.
1326 };
1327
1328 // DT_MIPS_FLAGS values.
1329 enum {
1330 RHF_NONE = 0x00000000, // No flags.
1331 RHF_QUICKSTART = 0x00000001, // Uses shortcut pointers.
1332 RHF_NOTPOT = 0x00000002, // Hash size is not a power of two.
1333 RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH.
1334 RHF_NO_MOVE = 0x00000008, // DSO address may not be relocated.
1335 RHF_SGI_ONLY = 0x00000010, // SGI specific features.
1336 RHF_GUARANTEE_INIT = 0x00000020, // Guarantee that .init will finish
1337 // executing before any non-init
1338 // code in DSO is called.
1339 RHF_DELTA_C_PLUS_PLUS = 0x00000040, // Contains Delta C++ code.
1340 RHF_GUARANTEE_START_INIT = 0x00000080, // Guarantee that .init will start
1341 // executing before any non-init
1342 // code in DSO is called.
1343 RHF_PIXIE = 0x00000100, // Generated by pixie.
1344 RHF_DEFAULT_DELAY_LOAD = 0x00000200, // Delay-load DSO by default.
1345 RHF_REQUICKSTART = 0x00000400, // Object may be requickstarted
1346 RHF_REQUICKSTARTED = 0x00000800, // Object has been requickstarted
1347 RHF_CORD = 0x00001000, // Generated by cord.
1348 RHF_NO_UNRES_UNDEF = 0x00002000, // Object contains no unresolved
1349 // undef symbols.
1350 RHF_RLD_ORDER_SAFE = 0x00004000 // Symbol table is in a safe order.
1351 };
1352
1353 // ElfXX_VerDef structure version (GNU versioning)
1354 enum { VER_DEF_NONE = 0, VER_DEF_CURRENT = 1 };
1355
1356 // VerDef Flags (ElfXX_VerDef::vd_flags)
1357 enum { VER_FLG_BASE = 0x1, VER_FLG_WEAK = 0x2, VER_FLG_INFO = 0x4 };
1358
1359 // Special constants for the version table. (SHT_GNU_versym/.gnu.version)
1360 enum {
1361 VER_NDX_LOCAL = 0, // Unversioned local symbol
1362 VER_NDX_GLOBAL = 1, // Unversioned global symbol
1363 VERSYM_VERSION = 0x7fff, // Version Index mask
1364 VERSYM_HIDDEN = 0x8000 // Hidden bit (non-default version)
1365 };
1366
1367 // ElfXX_VerNeed structure version (GNU versioning)
1368 enum { VER_NEED_NONE = 0, VER_NEED_CURRENT = 1 };
1369
1370 // SHT_NOTE section types
1371 enum {
1372 NT_FREEBSD_THRMISC = 7,
1373 NT_FREEBSD_PROCSTAT_PROC = 8,
1374 NT_FREEBSD_PROCSTAT_FILES = 9,
1375 NT_FREEBSD_PROCSTAT_VMMAP = 10,
1376 NT_FREEBSD_PROCSTAT_GROUPS = 11,
1377 NT_FREEBSD_PROCSTAT_UMASK = 12,
1378 NT_FREEBSD_PROCSTAT_RLIMIT = 13,
1379 NT_FREEBSD_PROCSTAT_OSREL = 14,
1380 NT_FREEBSD_PROCSTAT_PSSTRINGS = 15,
1381 NT_FREEBSD_PROCSTAT_AUXV = 16,
1382 };
1383
1384 // Generic note types
1385 enum : unsigned {
1386 NT_VERSION = 1,
1387 NT_ARCH = 2,
1388 NT_GNU_BUILD_ATTRIBUTE_OPEN = 0x100,
1389 NT_GNU_BUILD_ATTRIBUTE_FUNC = 0x101,
1390 };
1391
1392 // Core note types
1393 enum : unsigned {
1394 NT_PRSTATUS = 1,
1395 NT_FPREGSET = 2,
1396 NT_PRPSINFO = 3,
1397 NT_TASKSTRUCT = 4,
1398 NT_AUXV = 6,
1399 NT_PSTATUS = 10,
1400 NT_FPREGS = 12,
1401 NT_PSINFO = 13,
1402 NT_LWPSTATUS = 16,
1403 NT_LWPSINFO = 17,
1404 NT_WIN32PSTATUS = 18,
1405
1406 NT_PPC_VMX = 0x100,
1407 NT_PPC_VSX = 0x102,
1408 NT_PPC_TAR = 0x103,
1409 NT_PPC_PPR = 0x104,
1410 NT_PPC_DSCR = 0x105,
1411 NT_PPC_EBB = 0x106,
1412 NT_PPC_PMU = 0x107,
1413 NT_PPC_TM_CGPR = 0x108,
1414 NT_PPC_TM_CFPR = 0x109,
1415 NT_PPC_TM_CVMX = 0x10a,
1416 NT_PPC_TM_CVSX = 0x10b,
1417 NT_PPC_TM_SPR = 0x10c,
1418 NT_PPC_TM_CTAR = 0x10d,
1419 NT_PPC_TM_CPPR = 0x10e,
1420 NT_PPC_TM_CDSCR = 0x10f,
1421
1422 NT_386_TLS = 0x200,
1423 NT_386_IOPERM = 0x201,
1424 NT_X86_XSTATE = 0x202,
1425
1426 NT_S390_HIGH_GPRS = 0x300,
1427 NT_S390_TIMER = 0x301,
1428 NT_S390_TODCMP = 0x302,
1429 NT_S390_TODPREG = 0x303,
1430 NT_S390_CTRS = 0x304,
1431 NT_S390_PREFIX = 0x305,
1432 NT_S390_LAST_BREAK = 0x306,
1433 NT_S390_SYSTEM_CALL = 0x307,
1434 NT_S390_TDB = 0x308,
1435 NT_S390_VXRS_LOW = 0x309,
1436 NT_S390_VXRS_HIGH = 0x30a,
1437 NT_S390_GS_CB = 0x30b,
1438 NT_S390_GS_BC = 0x30c,
1439
1440 NT_ARM_VFP = 0x400,
1441 NT_ARM_TLS = 0x401,
1442 NT_ARM_HW_BREAK = 0x402,
1443 NT_ARM_HW_WATCH = 0x403,
1444 NT_ARM_SVE = 0x405,
1445 NT_ARM_PAC_MASK = 0x406,
1446
1447 NT_FILE = 0x46494c45,
1448 NT_PRXFPREG = 0x46e62b7f,
1449 NT_SIGINFO = 0x53494749,
1450 };
1451
1452 // LLVM-specific notes.
1453 enum {
1454 NT_LLVM_HWASAN_GLOBALS = 3,
1455 };
1456
1457 // GNU note types
1458 enum {
1459 NT_GNU_ABI_TAG = 1,
1460 NT_GNU_HWCAP = 2,
1461 NT_GNU_BUILD_ID = 3,
1462 NT_GNU_GOLD_VERSION = 4,
1463 NT_GNU_PROPERTY_TYPE_0 = 5,
1464 };
1465
1466 // Property types used in GNU_PROPERTY_TYPE_0 notes.
1467 enum : unsigned {
1468 GNU_PROPERTY_STACK_SIZE = 1,
1469 GNU_PROPERTY_NO_COPY_ON_PROTECTED = 2,
1470 GNU_PROPERTY_AARCH64_FEATURE_1_AND = 0xc0000000,
1471 GNU_PROPERTY_X86_FEATURE_1_AND = 0xc0000002,
1472 GNU_PROPERTY_X86_ISA_1_NEEDED = 0xc0008000,
1473 GNU_PROPERTY_X86_FEATURE_2_NEEDED = 0xc0008001,
1474 GNU_PROPERTY_X86_ISA_1_USED = 0xc0010000,
1475 GNU_PROPERTY_X86_FEATURE_2_USED = 0xc0010001,
1476 };
1477
1478 // aarch64 processor feature bits.
1479 enum : unsigned {
1480 GNU_PROPERTY_AARCH64_FEATURE_1_BTI = 1 << 0,
1481 GNU_PROPERTY_AARCH64_FEATURE_1_PAC = 1 << 1,
1482 };
1483
1484 // x86 processor feature bits.
1485 enum : unsigned {
1486 GNU_PROPERTY_X86_FEATURE_1_IBT = 1 << 0,
1487 GNU_PROPERTY_X86_FEATURE_1_SHSTK = 1 << 1,
1488
1489 GNU_PROPERTY_X86_ISA_1_CMOV = 1 << 0,
1490 GNU_PROPERTY_X86_ISA_1_SSE = 1 << 1,
1491 GNU_PROPERTY_X86_ISA_1_SSE2 = 1 << 2,
1492 GNU_PROPERTY_X86_ISA_1_SSE3 = 1 << 3,
1493 GNU_PROPERTY_X86_ISA_1_SSSE3 = 1 << 4,
1494 GNU_PROPERTY_X86_ISA_1_SSE4_1 = 1 << 5,
1495 GNU_PROPERTY_X86_ISA_1_SSE4_2 = 1 << 6,
1496 GNU_PROPERTY_X86_ISA_1_AVX = 1 << 7,
1497 GNU_PROPERTY_X86_ISA_1_AVX2 = 1 << 8,
1498 GNU_PROPERTY_X86_ISA_1_FMA = 1 << 9,
1499 GNU_PROPERTY_X86_ISA_1_AVX512F = 1 << 10,
1500 GNU_PROPERTY_X86_ISA_1_AVX512CD = 1 << 11,
1501 GNU_PROPERTY_X86_ISA_1_AVX512ER = 1 << 12,
1502 GNU_PROPERTY_X86_ISA_1_AVX512PF = 1 << 13,
1503 GNU_PROPERTY_X86_ISA_1_AVX512VL = 1 << 14,
1504 GNU_PROPERTY_X86_ISA_1_AVX512DQ = 1 << 15,
1505 GNU_PROPERTY_X86_ISA_1_AVX512BW = 1 << 16,
1506 GNU_PROPERTY_X86_ISA_1_AVX512_4FMAPS = 1 << 17,
1507 GNU_PROPERTY_X86_ISA_1_AVX512_4VNNIW = 1 << 18,
1508 GNU_PROPERTY_X86_ISA_1_AVX512_BITALG = 1 << 19,
1509 GNU_PROPERTY_X86_ISA_1_AVX512_IFMA = 1 << 20,
1510 GNU_PROPERTY_X86_ISA_1_AVX512_VBMI = 1 << 21,
1511 GNU_PROPERTY_X86_ISA_1_AVX512_VBMI2 = 1 << 22,
1512 GNU_PROPERTY_X86_ISA_1_AVX512_VNNI = 1 << 23,
1513
1514 GNU_PROPERTY_X86_FEATURE_2_X86 = 1 << 0,
1515 GNU_PROPERTY_X86_FEATURE_2_X87 = 1 << 1,
1516 GNU_PROPERTY_X86_FEATURE_2_MMX = 1 << 2,
1517 GNU_PROPERTY_X86_FEATURE_2_XMM = 1 << 3,
1518 GNU_PROPERTY_X86_FEATURE_2_YMM = 1 << 4,
1519 GNU_PROPERTY_X86_FEATURE_2_ZMM = 1 << 5,
1520 GNU_PROPERTY_X86_FEATURE_2_FXSR = 1 << 6,
1521 GNU_PROPERTY_X86_FEATURE_2_XSAVE = 1 << 7,
1522 GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT = 1 << 8,
1523 GNU_PROPERTY_X86_FEATURE_2_XSAVEC = 1 << 9,
1524 };
1525
1526 // AMDGPU-specific section indices.
1527 enum {
1528 SHN_AMDGPU_LDS = 0xff00, // Variable in LDS; symbol encoded like SHN_COMMON
1529 };
1530
1531 // AMD specific notes. (Code Object V2)
1532 enum {
1533 // Note types with values between 0 and 9 (inclusive) are reserved.
1534 NT_AMD_AMDGPU_HSA_METADATA = 10,
1535 NT_AMD_AMDGPU_ISA = 11,
1536 NT_AMD_AMDGPU_PAL_METADATA = 12
1537 };
1538
1539 // AMDGPU specific notes. (Code Object V3)
1540 enum {
1541 // Note types with values between 0 and 31 (inclusive) are reserved.
1542 NT_AMDGPU_METADATA = 32
1543 };
1544
1545 enum {
1546 GNU_ABI_TAG_LINUX = 0,
1547 GNU_ABI_TAG_HURD = 1,
1548 GNU_ABI_TAG_SOLARIS = 2,
1549 GNU_ABI_TAG_FREEBSD = 3,
1550 GNU_ABI_TAG_NETBSD = 4,
1551 GNU_ABI_TAG_SYLLABLE = 5,
1552 GNU_ABI_TAG_NACL = 6,
1553 };
1554
1555 constexpr const char *ELF_NOTE_GNU = "GNU";
1556
1557 // Android packed relocation group flags.
1558 enum {
1559 RELOCATION_GROUPED_BY_INFO_FLAG = 1,
1560 RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG = 2,
1561 RELOCATION_GROUPED_BY_ADDEND_FLAG = 4,
1562 RELOCATION_GROUP_HAS_ADDEND_FLAG = 8,
1563 };
1564
1565 // Compressed section header for ELF32.
1566 struct Elf32_Chdr {
1567 Elf32_Word ch_type;
1568 Elf32_Word ch_size;
1569 Elf32_Word ch_addralign;
1570 };
1571
1572 // Compressed section header for ELF64.
1573 struct Elf64_Chdr {
1574 Elf64_Word ch_type;
1575 Elf64_Word ch_reserved;
1576 Elf64_Xword ch_size;
1577 Elf64_Xword ch_addralign;
1578 };
1579
1580 // Node header for ELF32.
1581 struct Elf32_Nhdr {
1582 Elf32_Word n_namesz;
1583 Elf32_Word n_descsz;
1584 Elf32_Word n_type;
1585 };
1586
1587 // Node header for ELF64.
1588 struct Elf64_Nhdr {
1589 Elf64_Word n_namesz;
1590 Elf64_Word n_descsz;
1591 Elf64_Word n_type;
1592 };
1593
1594 // Legal values for ch_type field of compressed section header.
1595 enum {
1596 ELFCOMPRESS_ZLIB = 1, // ZLIB/DEFLATE algorithm.
1597 ELFCOMPRESS_LOOS = 0x60000000, // Start of OS-specific.
1598 ELFCOMPRESS_HIOS = 0x6fffffff, // End of OS-specific.
1599 ELFCOMPRESS_LOPROC = 0x70000000, // Start of processor-specific.
1600 ELFCOMPRESS_HIPROC = 0x7fffffff // End of processor-specific.
1601 };
1602
1603 } // end namespace ELF
1604 } // end namespace llvm
1605
1606 #endif // LLVM_BINARYFORMAT_ELF_H
1607