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_MICROBLAZE = 189, // Xilinx MicroBlaze 32-bit RISC soft processor core
285 EM_CUDA = 190, // NVIDIA CUDA architecture
286 EM_TILEGX = 191, // Tilera TILE-Gx multicore architecture family
287 EM_CLOUDSHIELD = 192, // CloudShield architecture family
288 EM_COREA_1ST = 193, // KIPO-KAIST Core-A 1st generation processor family
289 EM_COREA_2ND = 194, // KIPO-KAIST Core-A 2nd generation processor family
290 EM_ARC_COMPACT2 = 195, // Synopsys ARCompact V2
291 EM_OPEN8 = 196, // Open8 8-bit RISC soft processor core
292 EM_RL78 = 197, // Renesas RL78 family
293 EM_VIDEOCORE5 = 198, // Broadcom VideoCore V processor
294 EM_78KOR = 199, // Renesas 78KOR family
295 EM_56800EX = 200, // Freescale 56800EX Digital Signal Controller (DSC)
296 EM_BA1 = 201, // Beyond BA1 CPU architecture
297 EM_BA2 = 202, // Beyond BA2 CPU architecture
298 EM_XCORE = 203, // XMOS xCORE processor family
299 EM_MCHP_PIC = 204, // Microchip 8-bit PIC(r) family
300 EM_INTEL205 = 205, // Reserved by Intel
301 EM_INTEL206 = 206, // Reserved by Intel
302 EM_INTEL207 = 207, // Reserved by Intel
303 EM_INTEL208 = 208, // Reserved by Intel
304 EM_INTEL209 = 209, // Reserved by Intel
305 EM_KM32 = 210, // KM211 KM32 32-bit processor
306 EM_KMX32 = 211, // KM211 KMX32 32-bit processor
307 EM_KMX16 = 212, // KM211 KMX16 16-bit processor
308 EM_KMX8 = 213, // KM211 KMX8 8-bit processor
309 EM_KVARC = 214, // KM211 KVARC processor
310 EM_CDP = 215, // Paneve CDP architecture family
311 EM_COGE = 216, // Cognitive Smart Memory Processor
312 EM_COOL = 217, // iCelero CoolEngine
313 EM_NORC = 218, // Nanoradio Optimized RISC
314 EM_CSR_KALIMBA = 219, // CSR Kalimba architecture family
315 EM_AMDGPU = 224, // AMD GPU architecture
316 EM_RISCV = 243, // RISC-V
317 EM_LANAI = 244, // Lanai 32-bit processor
318 EM_BPF = 247, // Linux kernel bpf virtual machine
319 EM_VE = 251, // NEC SX-Aurora VE
320 EM_CSKY = 252, // C-SKY 32-bit processor
321 };
322
323 // Object file classes.
324 enum {
325 ELFCLASSNONE = 0,
326 ELFCLASS32 = 1, // 32-bit object file
327 ELFCLASS64 = 2 // 64-bit object file
328 };
329
330 // Object file byte orderings.
331 enum {
332 ELFDATANONE = 0, // Invalid data encoding.
333 ELFDATA2LSB = 1, // Little-endian object file
334 ELFDATA2MSB = 2 // Big-endian object file
335 };
336
337 // OS ABI identification.
338 enum {
339 ELFOSABI_NONE = 0, // UNIX System V ABI
340 ELFOSABI_HPUX = 1, // HP-UX operating system
341 ELFOSABI_NETBSD = 2, // NetBSD
342 ELFOSABI_GNU = 3, // GNU/Linux
343 ELFOSABI_LINUX = 3, // Historical alias for ELFOSABI_GNU.
344 ELFOSABI_HURD = 4, // GNU/Hurd
345 ELFOSABI_SOLARIS = 6, // Solaris
346 ELFOSABI_AIX = 7, // AIX
347 ELFOSABI_IRIX = 8, // IRIX
348 ELFOSABI_FREEBSD = 9, // FreeBSD
349 ELFOSABI_TRU64 = 10, // TRU64 UNIX
350 ELFOSABI_MODESTO = 11, // Novell Modesto
351 ELFOSABI_OPENBSD = 12, // OpenBSD
352 ELFOSABI_OPENVMS = 13, // OpenVMS
353 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel
354 ELFOSABI_AROS = 15, // AROS
355 ELFOSABI_FENIXOS = 16, // FenixOS
356 ELFOSABI_CLOUDABI = 17, // Nuxi CloudABI
357 ELFOSABI_FIRST_ARCH = 64, // First architecture-specific OS ABI
358 ELFOSABI_AMDGPU_HSA = 64, // AMD HSA runtime
359 ELFOSABI_AMDGPU_PAL = 65, // AMD PAL runtime
360 ELFOSABI_AMDGPU_MESA3D = 66, // AMD GCN GPUs (GFX6+) for MESA runtime
361 ELFOSABI_ARM = 97, // ARM
362 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
363 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000
364 ELFOSABI_STANDALONE = 255, // Standalone (embedded) application
365 ELFOSABI_LAST_ARCH = 255 // Last Architecture-specific OS ABI
366 };
367
368 // AMDGPU OS ABI Version identification.
369 enum {
370 // ELFABIVERSION_AMDGPU_HSA_V1 does not exist because OS ABI identification
371 // was never defined for V1.
372 ELFABIVERSION_AMDGPU_HSA_V2 = 0,
373 ELFABIVERSION_AMDGPU_HSA_V3 = 1,
374 ELFABIVERSION_AMDGPU_HSA_V4 = 2
375 };
376
377 #define ELF_RELOC(name, value) name = value,
378
379 // X86_64 relocations.
380 enum {
381 #include "ELFRelocs/x86_64.def"
382 };
383
384 // i386 relocations.
385 enum {
386 #include "ELFRelocs/i386.def"
387 };
388
389 // ELF Relocation types for PPC32
390 enum {
391 #include "ELFRelocs/PowerPC.def"
392 };
393
394 // Specific e_flags for PPC64
395 enum {
396 // e_flags bits specifying ABI:
397 // 1 for original ABI using function descriptors,
398 // 2 for revised ABI without function descriptors,
399 // 0 for unspecified or not using any features affected by the differences.
400 EF_PPC64_ABI = 3
401 };
402
403 // Special values for the st_other field in the symbol table entry for PPC64.
404 enum {
405 STO_PPC64_LOCAL_BIT = 5,
406 STO_PPC64_LOCAL_MASK = (7 << STO_PPC64_LOCAL_BIT)
407 };
decodePPC64LocalEntryOffset(unsigned Other)408 static inline int64_t decodePPC64LocalEntryOffset(unsigned Other) {
409 unsigned Val = (Other & STO_PPC64_LOCAL_MASK) >> STO_PPC64_LOCAL_BIT;
410 return ((1 << Val) >> 2) << 2;
411 }
412
413 // ELF Relocation types for PPC64
414 enum {
415 #include "ELFRelocs/PowerPC64.def"
416 };
417
418 // ELF Relocation types for AArch64
419 enum {
420 #include "ELFRelocs/AArch64.def"
421 };
422
423 // Special values for the st_other field in the symbol table entry for AArch64.
424 enum {
425 // Symbol may follow different calling convention than base PCS.
426 STO_AARCH64_VARIANT_PCS = 0x80
427 };
428
429 // ARM Specific e_flags
430 enum : unsigned {
431 EF_ARM_SOFT_FLOAT = 0x00000200U, // Legacy pre EABI_VER5
432 EF_ARM_ABI_FLOAT_SOFT = 0x00000200U, // EABI_VER5
433 EF_ARM_VFP_FLOAT = 0x00000400U, // Legacy pre EABI_VER5
434 EF_ARM_ABI_FLOAT_HARD = 0x00000400U, // EABI_VER5
435 EF_ARM_EABI_UNKNOWN = 0x00000000U,
436 EF_ARM_EABI_VER1 = 0x01000000U,
437 EF_ARM_EABI_VER2 = 0x02000000U,
438 EF_ARM_EABI_VER3 = 0x03000000U,
439 EF_ARM_EABI_VER4 = 0x04000000U,
440 EF_ARM_EABI_VER5 = 0x05000000U,
441 EF_ARM_EABIMASK = 0xFF000000U
442 };
443
444 // ELF Relocation types for ARM
445 enum {
446 #include "ELFRelocs/ARM.def"
447 };
448
449 // ARC Specific e_flags
450 enum : unsigned {
451 EF_ARC_MACH_MSK = 0x000000ff,
452 EF_ARC_OSABI_MSK = 0x00000f00,
453 E_ARC_MACH_ARC600 = 0x00000002,
454 E_ARC_MACH_ARC601 = 0x00000004,
455 E_ARC_MACH_ARC700 = 0x00000003,
456 EF_ARC_CPU_ARCV2EM = 0x00000005,
457 EF_ARC_CPU_ARCV2HS = 0x00000006,
458 E_ARC_OSABI_ORIG = 0x00000000,
459 E_ARC_OSABI_V2 = 0x00000200,
460 E_ARC_OSABI_V3 = 0x00000300,
461 E_ARC_OSABI_V4 = 0x00000400,
462 EF_ARC_PIC = 0x00000100
463 };
464
465 // ELF Relocation types for ARC
466 enum {
467 #include "ELFRelocs/ARC.def"
468 };
469
470 // AVR specific e_flags
471 enum : unsigned {
472 EF_AVR_ARCH_AVR1 = 1,
473 EF_AVR_ARCH_AVR2 = 2,
474 EF_AVR_ARCH_AVR25 = 25,
475 EF_AVR_ARCH_AVR3 = 3,
476 EF_AVR_ARCH_AVR31 = 31,
477 EF_AVR_ARCH_AVR35 = 35,
478 EF_AVR_ARCH_AVR4 = 4,
479 EF_AVR_ARCH_AVR5 = 5,
480 EF_AVR_ARCH_AVR51 = 51,
481 EF_AVR_ARCH_AVR6 = 6,
482 EF_AVR_ARCH_AVRTINY = 100,
483 EF_AVR_ARCH_XMEGA1 = 101,
484 EF_AVR_ARCH_XMEGA2 = 102,
485 EF_AVR_ARCH_XMEGA3 = 103,
486 EF_AVR_ARCH_XMEGA4 = 104,
487 EF_AVR_ARCH_XMEGA5 = 105,
488 EF_AVR_ARCH_XMEGA6 = 106,
489 EF_AVR_ARCH_XMEGA7 = 107,
490
491 EF_AVR_ARCH_MASK = 0x7f, // EF_AVR_ARCH_xxx selection mask
492
493 EF_AVR_LINKRELAX_PREPARED = 0x80, // The file is prepared for linker
494 // relaxation to be applied
495 };
496
497 // ELF Relocation types for AVR
498 enum {
499 #include "ELFRelocs/AVR.def"
500 };
501
502 // Mips Specific e_flags
503 enum : unsigned {
504 EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions
505 EF_MIPS_PIC = 0x00000002, // Position independent code
506 EF_MIPS_CPIC = 0x00000004, // Call object with Position independent code
507 EF_MIPS_ABI2 = 0x00000020, // File uses N32 ABI
508 EF_MIPS_32BITMODE = 0x00000100, // Code compiled for a 64-bit machine
509 // in 32-bit mode
510 EF_MIPS_FP64 = 0x00000200, // Code compiled for a 32-bit machine
511 // but uses 64-bit FP registers
512 EF_MIPS_NAN2008 = 0x00000400, // Uses IEE 754-2008 NaN encoding
513
514 // ABI flags
515 EF_MIPS_ABI_O32 = 0x00001000, // This file follows the first MIPS 32 bit ABI
516 EF_MIPS_ABI_O64 = 0x00002000, // O32 ABI extended for 64-bit architecture.
517 EF_MIPS_ABI_EABI32 = 0x00003000, // EABI in 32 bit mode.
518 EF_MIPS_ABI_EABI64 = 0x00004000, // EABI in 64 bit mode.
519 EF_MIPS_ABI = 0x0000f000, // Mask for selecting EF_MIPS_ABI_ variant.
520
521 // MIPS machine variant
522 EF_MIPS_MACH_NONE = 0x00000000, // A standard MIPS implementation.
523 EF_MIPS_MACH_3900 = 0x00810000, // Toshiba R3900
524 EF_MIPS_MACH_4010 = 0x00820000, // LSI R4010
525 EF_MIPS_MACH_4100 = 0x00830000, // NEC VR4100
526 EF_MIPS_MACH_4650 = 0x00850000, // MIPS R4650
527 EF_MIPS_MACH_4120 = 0x00870000, // NEC VR4120
528 EF_MIPS_MACH_4111 = 0x00880000, // NEC VR4111/VR4181
529 EF_MIPS_MACH_SB1 = 0x008a0000, // Broadcom SB-1
530 EF_MIPS_MACH_OCTEON = 0x008b0000, // Cavium Networks Octeon
531 EF_MIPS_MACH_XLR = 0x008c0000, // RMI Xlr
532 EF_MIPS_MACH_OCTEON2 = 0x008d0000, // Cavium Networks Octeon2
533 EF_MIPS_MACH_OCTEON3 = 0x008e0000, // Cavium Networks Octeon3
534 EF_MIPS_MACH_5400 = 0x00910000, // NEC VR5400
535 EF_MIPS_MACH_5900 = 0x00920000, // MIPS R5900
536 EF_MIPS_MACH_5500 = 0x00980000, // NEC VR5500
537 EF_MIPS_MACH_9000 = 0x00990000, // Unknown
538 EF_MIPS_MACH_LS2E = 0x00a00000, // ST Microelectronics Loongson 2E
539 EF_MIPS_MACH_LS2F = 0x00a10000, // ST Microelectronics Loongson 2F
540 EF_MIPS_MACH_LS3A = 0x00a20000, // Loongson 3A
541 EF_MIPS_MACH = 0x00ff0000, // EF_MIPS_MACH_xxx selection mask
542
543 // ARCH_ASE
544 EF_MIPS_MICROMIPS = 0x02000000, // microMIPS
545 EF_MIPS_ARCH_ASE_M16 = 0x04000000, // Has Mips-16 ISA extensions
546 EF_MIPS_ARCH_ASE_MDMX = 0x08000000, // Has MDMX multimedia extensions
547 EF_MIPS_ARCH_ASE = 0x0f000000, // Mask for EF_MIPS_ARCH_ASE_xxx flags
548
549 // ARCH
550 EF_MIPS_ARCH_1 = 0x00000000, // MIPS1 instruction set
551 EF_MIPS_ARCH_2 = 0x10000000, // MIPS2 instruction set
552 EF_MIPS_ARCH_3 = 0x20000000, // MIPS3 instruction set
553 EF_MIPS_ARCH_4 = 0x30000000, // MIPS4 instruction set
554 EF_MIPS_ARCH_5 = 0x40000000, // MIPS5 instruction set
555 EF_MIPS_ARCH_32 = 0x50000000, // MIPS32 instruction set per linux not elf.h
556 EF_MIPS_ARCH_64 = 0x60000000, // MIPS64 instruction set per linux not elf.h
557 EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2, mips32r3, mips32r5
558 EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2, mips64r3, mips64r5
559 EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6
560 EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6
561 EF_MIPS_ARCH = 0xf0000000 // Mask for applying EF_MIPS_ARCH_ variant
562 };
563
564 // ELF Relocation types for Mips
565 enum {
566 #include "ELFRelocs/Mips.def"
567 };
568
569 // Special values for the st_other field in the symbol table entry for MIPS.
570 enum {
571 STO_MIPS_OPTIONAL = 0x04, // Symbol whose definition is optional
572 STO_MIPS_PLT = 0x08, // PLT entry related dynamic table record
573 STO_MIPS_PIC = 0x20, // PIC func in an object mixes PIC/non-PIC
574 STO_MIPS_MICROMIPS = 0x80, // MIPS Specific ISA for MicroMips
575 STO_MIPS_MIPS16 = 0xf0 // MIPS Specific ISA for Mips16
576 };
577
578 // .MIPS.options section descriptor kinds
579 enum {
580 ODK_NULL = 0, // Undefined
581 ODK_REGINFO = 1, // Register usage information
582 ODK_EXCEPTIONS = 2, // Exception processing options
583 ODK_PAD = 3, // Section padding options
584 ODK_HWPATCH = 4, // Hardware patches applied
585 ODK_FILL = 5, // Linker fill value
586 ODK_TAGS = 6, // Space for tool identification
587 ODK_HWAND = 7, // Hardware AND patches applied
588 ODK_HWOR = 8, // Hardware OR patches applied
589 ODK_GP_GROUP = 9, // GP group to use for text/data sections
590 ODK_IDENT = 10, // ID information
591 ODK_PAGESIZE = 11 // Page size information
592 };
593
594 // Hexagon-specific e_flags
595 enum {
596 // Object processor version flags, bits[11:0]
597 EF_HEXAGON_MACH_V2 = 0x00000001, // Hexagon V2
598 EF_HEXAGON_MACH_V3 = 0x00000002, // Hexagon V3
599 EF_HEXAGON_MACH_V4 = 0x00000003, // Hexagon V4
600 EF_HEXAGON_MACH_V5 = 0x00000004, // Hexagon V5
601 EF_HEXAGON_MACH_V55 = 0x00000005, // Hexagon V55
602 EF_HEXAGON_MACH_V60 = 0x00000060, // Hexagon V60
603 EF_HEXAGON_MACH_V62 = 0x00000062, // Hexagon V62
604 EF_HEXAGON_MACH_V65 = 0x00000065, // Hexagon V65
605 EF_HEXAGON_MACH_V66 = 0x00000066, // Hexagon V66
606 EF_HEXAGON_MACH_V67 = 0x00000067, // Hexagon V67
607 EF_HEXAGON_MACH_V67T = 0x00008067, // Hexagon V67T
608 EF_HEXAGON_MACH_V68 = 0x00000068, // Hexagon V68
609
610 // Highest ISA version flags
611 EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[11:0]
612 // of e_flags
613 EF_HEXAGON_ISA_V2 = 0x00000010, // Hexagon V2 ISA
614 EF_HEXAGON_ISA_V3 = 0x00000020, // Hexagon V3 ISA
615 EF_HEXAGON_ISA_V4 = 0x00000030, // Hexagon V4 ISA
616 EF_HEXAGON_ISA_V5 = 0x00000040, // Hexagon V5 ISA
617 EF_HEXAGON_ISA_V55 = 0x00000050, // Hexagon V55 ISA
618 EF_HEXAGON_ISA_V60 = 0x00000060, // Hexagon V60 ISA
619 EF_HEXAGON_ISA_V62 = 0x00000062, // Hexagon V62 ISA
620 EF_HEXAGON_ISA_V65 = 0x00000065, // Hexagon V65 ISA
621 EF_HEXAGON_ISA_V66 = 0x00000066, // Hexagon V66 ISA
622 EF_HEXAGON_ISA_V67 = 0x00000067, // Hexagon V67 ISA
623 EF_HEXAGON_ISA_V68 = 0x00000068, // Hexagon V68 ISA
624 };
625
626 // Hexagon-specific section indexes for common small data
627 enum {
628 SHN_HEXAGON_SCOMMON = 0xff00, // Other access sizes
629 SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access
630 SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access
631 SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access
632 SHN_HEXAGON_SCOMMON_8 = 0xff04 // Double-word-size access
633 };
634
635 // ELF Relocation types for Hexagon
636 enum {
637 #include "ELFRelocs/Hexagon.def"
638 };
639
640 // ELF Relocation type for Lanai.
641 enum {
642 #include "ELFRelocs/Lanai.def"
643 };
644
645 // RISCV Specific e_flags
646 enum : unsigned {
647 EF_RISCV_RVC = 0x0001,
648 EF_RISCV_FLOAT_ABI = 0x0006,
649 EF_RISCV_FLOAT_ABI_SOFT = 0x0000,
650 EF_RISCV_FLOAT_ABI_SINGLE = 0x0002,
651 EF_RISCV_FLOAT_ABI_DOUBLE = 0x0004,
652 EF_RISCV_FLOAT_ABI_QUAD = 0x0006,
653 EF_RISCV_RVE = 0x0008
654 };
655
656 // ELF Relocation types for RISC-V
657 enum {
658 #include "ELFRelocs/RISCV.def"
659 };
660
661 // ELF Relocation types for S390/zSeries
662 enum {
663 #include "ELFRelocs/SystemZ.def"
664 };
665
666 // ELF Relocation type for Sparc.
667 enum {
668 #include "ELFRelocs/Sparc.def"
669 };
670
671 // AMDGPU specific e_flags.
672 enum : unsigned {
673 // Processor selection mask for EF_AMDGPU_MACH_* values.
674 EF_AMDGPU_MACH = 0x0ff,
675
676 // Not specified processor.
677 EF_AMDGPU_MACH_NONE = 0x000,
678
679 // R600-based processors.
680
681 // Radeon HD 2000/3000 Series (R600).
682 EF_AMDGPU_MACH_R600_R600 = 0x001,
683 EF_AMDGPU_MACH_R600_R630 = 0x002,
684 EF_AMDGPU_MACH_R600_RS880 = 0x003,
685 EF_AMDGPU_MACH_R600_RV670 = 0x004,
686 // Radeon HD 4000 Series (R700).
687 EF_AMDGPU_MACH_R600_RV710 = 0x005,
688 EF_AMDGPU_MACH_R600_RV730 = 0x006,
689 EF_AMDGPU_MACH_R600_RV770 = 0x007,
690 // Radeon HD 5000 Series (Evergreen).
691 EF_AMDGPU_MACH_R600_CEDAR = 0x008,
692 EF_AMDGPU_MACH_R600_CYPRESS = 0x009,
693 EF_AMDGPU_MACH_R600_JUNIPER = 0x00a,
694 EF_AMDGPU_MACH_R600_REDWOOD = 0x00b,
695 EF_AMDGPU_MACH_R600_SUMO = 0x00c,
696 // Radeon HD 6000 Series (Northern Islands).
697 EF_AMDGPU_MACH_R600_BARTS = 0x00d,
698 EF_AMDGPU_MACH_R600_CAICOS = 0x00e,
699 EF_AMDGPU_MACH_R600_CAYMAN = 0x00f,
700 EF_AMDGPU_MACH_R600_TURKS = 0x010,
701
702 // Reserved for R600-based processors.
703 EF_AMDGPU_MACH_R600_RESERVED_FIRST = 0x011,
704 EF_AMDGPU_MACH_R600_RESERVED_LAST = 0x01f,
705
706 // First/last R600-based processors.
707 EF_AMDGPU_MACH_R600_FIRST = EF_AMDGPU_MACH_R600_R600,
708 EF_AMDGPU_MACH_R600_LAST = EF_AMDGPU_MACH_R600_TURKS,
709
710 // AMDGCN-based processors.
711 EF_AMDGPU_MACH_AMDGCN_GFX600 = 0x020,
712 EF_AMDGPU_MACH_AMDGCN_GFX601 = 0x021,
713 EF_AMDGPU_MACH_AMDGCN_GFX700 = 0x022,
714 EF_AMDGPU_MACH_AMDGCN_GFX701 = 0x023,
715 EF_AMDGPU_MACH_AMDGCN_GFX702 = 0x024,
716 EF_AMDGPU_MACH_AMDGCN_GFX703 = 0x025,
717 EF_AMDGPU_MACH_AMDGCN_GFX704 = 0x026,
718 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X27 = 0x027,
719 EF_AMDGPU_MACH_AMDGCN_GFX801 = 0x028,
720 EF_AMDGPU_MACH_AMDGCN_GFX802 = 0x029,
721 EF_AMDGPU_MACH_AMDGCN_GFX803 = 0x02a,
722 EF_AMDGPU_MACH_AMDGCN_GFX810 = 0x02b,
723 EF_AMDGPU_MACH_AMDGCN_GFX900 = 0x02c,
724 EF_AMDGPU_MACH_AMDGCN_GFX902 = 0x02d,
725 EF_AMDGPU_MACH_AMDGCN_GFX904 = 0x02e,
726 EF_AMDGPU_MACH_AMDGCN_GFX906 = 0x02f,
727 EF_AMDGPU_MACH_AMDGCN_GFX908 = 0x030,
728 EF_AMDGPU_MACH_AMDGCN_GFX909 = 0x031,
729 EF_AMDGPU_MACH_AMDGCN_GFX90C = 0x032,
730 EF_AMDGPU_MACH_AMDGCN_GFX1010 = 0x033,
731 EF_AMDGPU_MACH_AMDGCN_GFX1011 = 0x034,
732 EF_AMDGPU_MACH_AMDGCN_GFX1012 = 0x035,
733 EF_AMDGPU_MACH_AMDGCN_GFX1030 = 0x036,
734 EF_AMDGPU_MACH_AMDGCN_GFX1031 = 0x037,
735 EF_AMDGPU_MACH_AMDGCN_GFX1032 = 0x038,
736 EF_AMDGPU_MACH_AMDGCN_GFX1033 = 0x039,
737 EF_AMDGPU_MACH_AMDGCN_GFX602 = 0x03a,
738 EF_AMDGPU_MACH_AMDGCN_GFX705 = 0x03b,
739 EF_AMDGPU_MACH_AMDGCN_GFX805 = 0x03c,
740 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X3D = 0x03d,
741 EF_AMDGPU_MACH_AMDGCN_GFX1034 = 0x03e,
742 EF_AMDGPU_MACH_AMDGCN_GFX90A = 0x03f,
743 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X40 = 0x040,
744 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X41 = 0x041,
745
746 // First/last AMDGCN-based processors.
747 EF_AMDGPU_MACH_AMDGCN_FIRST = EF_AMDGPU_MACH_AMDGCN_GFX600,
748 EF_AMDGPU_MACH_AMDGCN_LAST = EF_AMDGPU_MACH_AMDGCN_GFX90A,
749
750 // Indicates if the "xnack" target feature is enabled for all code contained
751 // in the object.
752 //
753 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V2.
754 EF_AMDGPU_FEATURE_XNACK_V2 = 0x01,
755 // Indicates if the trap handler is enabled for all code contained
756 // in the object.
757 //
758 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V2.
759 EF_AMDGPU_FEATURE_TRAP_HANDLER_V2 = 0x02,
760
761 // Indicates if the "xnack" target feature is enabled for all code contained
762 // in the object.
763 //
764 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V3.
765 EF_AMDGPU_FEATURE_XNACK_V3 = 0x100,
766 // Indicates if the "sramecc" target feature is enabled for all code
767 // contained in the object.
768 //
769 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V3.
770 EF_AMDGPU_FEATURE_SRAMECC_V3 = 0x200,
771
772 // XNACK selection mask for EF_AMDGPU_FEATURE_XNACK_* values.
773 //
774 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V4.
775 EF_AMDGPU_FEATURE_XNACK_V4 = 0x300,
776 // XNACK is not supported.
777 EF_AMDGPU_FEATURE_XNACK_UNSUPPORTED_V4 = 0x000,
778 // XNACK is any/default/unspecified.
779 EF_AMDGPU_FEATURE_XNACK_ANY_V4 = 0x100,
780 // XNACK is off.
781 EF_AMDGPU_FEATURE_XNACK_OFF_V4 = 0x200,
782 // XNACK is on.
783 EF_AMDGPU_FEATURE_XNACK_ON_V4 = 0x300,
784
785 // SRAMECC selection mask for EF_AMDGPU_FEATURE_SRAMECC_* values.
786 //
787 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V4.
788 EF_AMDGPU_FEATURE_SRAMECC_V4 = 0xc00,
789 // SRAMECC is not supported.
790 EF_AMDGPU_FEATURE_SRAMECC_UNSUPPORTED_V4 = 0x000,
791 // SRAMECC is any/default/unspecified.
792 EF_AMDGPU_FEATURE_SRAMECC_ANY_V4 = 0x400,
793 // SRAMECC is off.
794 EF_AMDGPU_FEATURE_SRAMECC_OFF_V4 = 0x800,
795 // SRAMECC is on.
796 EF_AMDGPU_FEATURE_SRAMECC_ON_V4 = 0xc00,
797 };
798
799 // ELF Relocation types for AMDGPU
800 enum {
801 #include "ELFRelocs/AMDGPU.def"
802 };
803
804 // ELF Relocation types for BPF
805 enum {
806 #include "ELFRelocs/BPF.def"
807 };
808
809 // ELF Relocation types for M68k
810 enum {
811 #include "ELFRelocs/M68k.def"
812 };
813
814 // MSP430 specific e_flags
815 enum : unsigned {
816 EF_MSP430_MACH_MSP430x11 = 11,
817 EF_MSP430_MACH_MSP430x11x1 = 110,
818 EF_MSP430_MACH_MSP430x12 = 12,
819 EF_MSP430_MACH_MSP430x13 = 13,
820 EF_MSP430_MACH_MSP430x14 = 14,
821 EF_MSP430_MACH_MSP430x15 = 15,
822 EF_MSP430_MACH_MSP430x16 = 16,
823 EF_MSP430_MACH_MSP430x20 = 20,
824 EF_MSP430_MACH_MSP430x22 = 22,
825 EF_MSP430_MACH_MSP430x23 = 23,
826 EF_MSP430_MACH_MSP430x24 = 24,
827 EF_MSP430_MACH_MSP430x26 = 26,
828 EF_MSP430_MACH_MSP430x31 = 31,
829 EF_MSP430_MACH_MSP430x32 = 32,
830 EF_MSP430_MACH_MSP430x33 = 33,
831 EF_MSP430_MACH_MSP430x41 = 41,
832 EF_MSP430_MACH_MSP430x42 = 42,
833 EF_MSP430_MACH_MSP430x43 = 43,
834 EF_MSP430_MACH_MSP430x44 = 44,
835 EF_MSP430_MACH_MSP430X = 45,
836 EF_MSP430_MACH_MSP430x46 = 46,
837 EF_MSP430_MACH_MSP430x47 = 47,
838 EF_MSP430_MACH_MSP430x54 = 54,
839 };
840
841 // ELF Relocation types for MSP430
842 enum {
843 #include "ELFRelocs/MSP430.def"
844 };
845
846 // ELF Relocation type for VE.
847 enum {
848 #include "ELFRelocs/VE.def"
849 };
850
851
852 // ELF Relocation types for CSKY
853 enum {
854 #include "ELFRelocs/CSKY.def"
855 };
856
857 #undef ELF_RELOC
858
859 // Section header.
860 struct Elf32_Shdr {
861 Elf32_Word sh_name; // Section name (index into string table)
862 Elf32_Word sh_type; // Section type (SHT_*)
863 Elf32_Word sh_flags; // Section flags (SHF_*)
864 Elf32_Addr sh_addr; // Address where section is to be loaded
865 Elf32_Off sh_offset; // File offset of section data, in bytes
866 Elf32_Word sh_size; // Size of section, in bytes
867 Elf32_Word sh_link; // Section type-specific header table index link
868 Elf32_Word sh_info; // Section type-specific extra information
869 Elf32_Word sh_addralign; // Section address alignment
870 Elf32_Word sh_entsize; // Size of records contained within the section
871 };
872
873 // Section header for ELF64 - same fields as ELF32, different types.
874 struct Elf64_Shdr {
875 Elf64_Word sh_name;
876 Elf64_Word sh_type;
877 Elf64_Xword sh_flags;
878 Elf64_Addr sh_addr;
879 Elf64_Off sh_offset;
880 Elf64_Xword sh_size;
881 Elf64_Word sh_link;
882 Elf64_Word sh_info;
883 Elf64_Xword sh_addralign;
884 Elf64_Xword sh_entsize;
885 };
886
887 // Special section indices.
888 enum {
889 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless
890 SHN_LORESERVE = 0xff00, // Lowest reserved index
891 SHN_LOPROC = 0xff00, // Lowest processor-specific index
892 SHN_HIPROC = 0xff1f, // Highest processor-specific index
893 SHN_LOOS = 0xff20, // Lowest operating system-specific index
894 SHN_HIOS = 0xff3f, // Highest operating system-specific index
895 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation
896 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables
897 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE
898 SHN_HIRESERVE = 0xffff // Highest reserved index
899 };
900
901 // Section types.
902 enum : unsigned {
903 SHT_NULL = 0, // No associated section (inactive entry).
904 SHT_PROGBITS = 1, // Program-defined contents.
905 SHT_SYMTAB = 2, // Symbol table.
906 SHT_STRTAB = 3, // String table.
907 SHT_RELA = 4, // Relocation entries; explicit addends.
908 SHT_HASH = 5, // Symbol hash table.
909 SHT_DYNAMIC = 6, // Information for dynamic linking.
910 SHT_NOTE = 7, // Information about the file.
911 SHT_NOBITS = 8, // Data occupies no space in the file.
912 SHT_REL = 9, // Relocation entries; no explicit addends.
913 SHT_SHLIB = 10, // Reserved.
914 SHT_DYNSYM = 11, // Symbol table.
915 SHT_INIT_ARRAY = 14, // Pointers to initialization functions.
916 SHT_FINI_ARRAY = 15, // Pointers to termination functions.
917 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions.
918 SHT_GROUP = 17, // Section group.
919 SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries.
920 // Experimental support for SHT_RELR sections. For details, see proposal
921 // at https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg
922 SHT_RELR = 19, // Relocation entries; only offsets.
923 SHT_LOOS = 0x60000000, // Lowest operating system-specific type.
924 // Android packed relocation section types.
925 // https://android.googlesource.com/platform/bionic/+/6f12bfece5dcc01325e0abba56a46b1bcf991c69/tools/relocation_packer/src/elf_file.cc#37
926 SHT_ANDROID_REL = 0x60000001,
927 SHT_ANDROID_RELA = 0x60000002,
928 SHT_LLVM_ODRTAB = 0x6fff4c00, // LLVM ODR table.
929 SHT_LLVM_LINKER_OPTIONS = 0x6fff4c01, // LLVM Linker Options.
930 SHT_LLVM_CALL_GRAPH_PROFILE = 0x6fff4c02, // LLVM Call Graph Profile.
931 SHT_LLVM_ADDRSIG = 0x6fff4c03, // List of address-significant symbols
932 // for safe ICF.
933 SHT_LLVM_DEPENDENT_LIBRARIES =
934 0x6fff4c04, // LLVM Dependent Library Specifiers.
935 SHT_LLVM_SYMPART = 0x6fff4c05, // Symbol partition specification.
936 SHT_LLVM_PART_EHDR = 0x6fff4c06, // ELF header for loadable partition.
937 SHT_LLVM_PART_PHDR = 0x6fff4c07, // Phdrs for loadable partition.
938 SHT_LLVM_BB_ADDR_MAP = 0x6fff4c08, // LLVM Basic Block Address Map.
939 // Android's experimental support for SHT_RELR sections.
940 // https://android.googlesource.com/platform/bionic/+/b7feec74547f84559a1467aca02708ff61346d2a/libc/include/elf.h#512
941 SHT_ANDROID_RELR = 0x6fffff00, // Relocation entries; only offsets.
942 SHT_GNU_ATTRIBUTES = 0x6ffffff5, // Object attributes.
943 SHT_GNU_HASH = 0x6ffffff6, // GNU-style hash table.
944 SHT_GNU_verdef = 0x6ffffffd, // GNU version definitions.
945 SHT_GNU_verneed = 0x6ffffffe, // GNU version references.
946 SHT_GNU_versym = 0x6fffffff, // GNU symbol versions table.
947 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type.
948 SHT_LOPROC = 0x70000000, // Lowest processor arch-specific type.
949 // Fixme: All this is duplicated in MCSectionELF. Why??
950 // Exception Index table
951 SHT_ARM_EXIDX = 0x70000001U,
952 // BPABI DLL dynamic linking pre-emption map
953 SHT_ARM_PREEMPTMAP = 0x70000002U,
954 // Object file compatibility attributes
955 SHT_ARM_ATTRIBUTES = 0x70000003U,
956 SHT_ARM_DEBUGOVERLAY = 0x70000004U,
957 SHT_ARM_OVERLAYSECTION = 0x70000005U,
958 SHT_HEX_ORDERED = 0x70000000, // Link editor is to sort the entries in
959 // this section based on their sizes
960 SHT_X86_64_UNWIND = 0x70000001, // Unwind information
961
962 SHT_MIPS_REGINFO = 0x70000006, // Register usage information
963 SHT_MIPS_OPTIONS = 0x7000000d, // General options
964 SHT_MIPS_DWARF = 0x7000001e, // DWARF debugging section.
965 SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information.
966
967 SHT_MSP430_ATTRIBUTES = 0x70000003U,
968
969 SHT_RISCV_ATTRIBUTES = 0x70000003U,
970
971 SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type.
972 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
973 SHT_HIUSER = 0xffffffff // Highest type reserved for applications.
974 };
975
976 // Section flags.
977 enum : unsigned {
978 // Section data should be writable during execution.
979 SHF_WRITE = 0x1,
980
981 // Section occupies memory during program execution.
982 SHF_ALLOC = 0x2,
983
984 // Section contains executable machine instructions.
985 SHF_EXECINSTR = 0x4,
986
987 // The data in this section may be merged.
988 SHF_MERGE = 0x10,
989
990 // The data in this section is null-terminated strings.
991 SHF_STRINGS = 0x20,
992
993 // A field in this section holds a section header table index.
994 SHF_INFO_LINK = 0x40U,
995
996 // Adds special ordering requirements for link editors.
997 SHF_LINK_ORDER = 0x80U,
998
999 // This section requires special OS-specific processing to avoid incorrect
1000 // behavior.
1001 SHF_OS_NONCONFORMING = 0x100U,
1002
1003 // This section is a member of a section group.
1004 SHF_GROUP = 0x200U,
1005
1006 // This section holds Thread-Local Storage.
1007 SHF_TLS = 0x400U,
1008
1009 // Identifies a section containing compressed data.
1010 SHF_COMPRESSED = 0x800U,
1011
1012 // This section should not be garbage collected by the linker.
1013 SHF_GNU_RETAIN = 0x200000,
1014
1015 // This section is excluded from the final executable or shared library.
1016 SHF_EXCLUDE = 0x80000000U,
1017
1018 // Start of target-specific flags.
1019
1020 SHF_MASKOS = 0x0ff00000,
1021
1022 // Bits indicating processor-specific flags.
1023 SHF_MASKPROC = 0xf0000000,
1024
1025 /// All sections with the "d" flag are grouped together by the linker to form
1026 /// the data section and the dp register is set to the start of the section by
1027 /// the boot code.
1028 XCORE_SHF_DP_SECTION = 0x10000000,
1029
1030 /// All sections with the "c" flag are grouped together by the linker to form
1031 /// the constant pool and the cp register is set to the start of the constant
1032 /// pool by the boot code.
1033 XCORE_SHF_CP_SECTION = 0x20000000,
1034
1035 // If an object file section does not have this flag set, then it may not hold
1036 // more than 2GB and can be freely referred to in objects using smaller code
1037 // models. Otherwise, only objects using larger code models can refer to them.
1038 // For example, a medium code model object can refer to data in a section that
1039 // sets this flag besides being able to refer to data in a section that does
1040 // not set it; likewise, a small code model object can refer only to code in a
1041 // section that does not set this flag.
1042 SHF_X86_64_LARGE = 0x10000000,
1043
1044 // All sections with the GPREL flag are grouped into a global data area
1045 // for faster accesses
1046 SHF_HEX_GPREL = 0x10000000,
1047
1048 // Section contains text/data which may be replicated in other sections.
1049 // Linker must retain only one copy.
1050 SHF_MIPS_NODUPES = 0x01000000,
1051
1052 // Linker must generate implicit hidden weak names.
1053 SHF_MIPS_NAMES = 0x02000000,
1054
1055 // Section data local to process.
1056 SHF_MIPS_LOCAL = 0x04000000,
1057
1058 // Do not strip this section.
1059 SHF_MIPS_NOSTRIP = 0x08000000,
1060
1061 // Section must be part of global data area.
1062 SHF_MIPS_GPREL = 0x10000000,
1063
1064 // This section should be merged.
1065 SHF_MIPS_MERGE = 0x20000000,
1066
1067 // Address size to be inferred from section entry size.
1068 SHF_MIPS_ADDR = 0x40000000,
1069
1070 // Section data is string data by default.
1071 SHF_MIPS_STRING = 0x80000000,
1072
1073 // Make code section unreadable when in execute-only mode
1074 SHF_ARM_PURECODE = 0x20000000
1075 };
1076
1077 // Section Group Flags
1078 enum : unsigned {
1079 GRP_COMDAT = 0x1,
1080 GRP_MASKOS = 0x0ff00000,
1081 GRP_MASKPROC = 0xf0000000
1082 };
1083
1084 // Symbol table entries for ELF32.
1085 struct Elf32_Sym {
1086 Elf32_Word st_name; // Symbol name (index into string table)
1087 Elf32_Addr st_value; // Value or address associated with the symbol
1088 Elf32_Word st_size; // Size of the symbol
1089 unsigned char st_info; // Symbol's type and binding attributes
1090 unsigned char st_other; // Must be zero; reserved
1091 Elf32_Half st_shndx; // Which section (header table index) it's defined in
1092
1093 // These accessors and mutators correspond to the ELF32_ST_BIND,
1094 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
getBindingElf32_Sym1095 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf32_Sym1096 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf32_Sym1097 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf32_Sym1098 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf32_Sym1099 void setBindingAndType(unsigned char b, unsigned char t) {
1100 st_info = (b << 4) + (t & 0x0f);
1101 }
1102 };
1103
1104 // Symbol table entries for ELF64.
1105 struct Elf64_Sym {
1106 Elf64_Word st_name; // Symbol name (index into string table)
1107 unsigned char st_info; // Symbol's type and binding attributes
1108 unsigned char st_other; // Must be zero; reserved
1109 Elf64_Half st_shndx; // Which section (header tbl index) it's defined in
1110 Elf64_Addr st_value; // Value or address associated with the symbol
1111 Elf64_Xword st_size; // Size of the symbol
1112
1113 // These accessors and mutators are identical to those defined for ELF32
1114 // symbol table entries.
getBindingElf64_Sym1115 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf64_Sym1116 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf64_Sym1117 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf64_Sym1118 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf64_Sym1119 void setBindingAndType(unsigned char b, unsigned char t) {
1120 st_info = (b << 4) + (t & 0x0f);
1121 }
1122 };
1123
1124 // The size (in bytes) of symbol table entries.
1125 enum {
1126 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
1127 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size.
1128 };
1129
1130 // Symbol bindings.
1131 enum {
1132 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def
1133 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined
1134 STB_WEAK = 2, // Weak symbol, like global but lower-precedence
1135 STB_GNU_UNIQUE = 10,
1136 STB_LOOS = 10, // Lowest operating system-specific binding type
1137 STB_HIOS = 12, // Highest operating system-specific binding type
1138 STB_LOPROC = 13, // Lowest processor-specific binding type
1139 STB_HIPROC = 15 // Highest processor-specific binding type
1140 };
1141
1142 // Symbol types.
1143 enum {
1144 STT_NOTYPE = 0, // Symbol's type is not specified
1145 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.)
1146 STT_FUNC = 2, // Symbol is executable code (function, etc.)
1147 STT_SECTION = 3, // Symbol refers to a section
1148 STT_FILE = 4, // Local, absolute symbol that refers to a file
1149 STT_COMMON = 5, // An uninitialized common block
1150 STT_TLS = 6, // Thread local data object
1151 STT_GNU_IFUNC = 10, // GNU indirect function
1152 STT_LOOS = 10, // Lowest operating system-specific symbol type
1153 STT_HIOS = 12, // Highest operating system-specific symbol type
1154 STT_LOPROC = 13, // Lowest processor-specific symbol type
1155 STT_HIPROC = 15, // Highest processor-specific symbol type
1156
1157 // AMDGPU symbol types
1158 STT_AMDGPU_HSA_KERNEL = 10
1159 };
1160
1161 enum {
1162 STV_DEFAULT = 0, // Visibility is specified by binding type
1163 STV_INTERNAL = 1, // Defined by processor supplements
1164 STV_HIDDEN = 2, // Not visible to other components
1165 STV_PROTECTED = 3 // Visible in other components but not preemptable
1166 };
1167
1168 // Symbol number.
1169 enum { STN_UNDEF = 0 };
1170
1171 // Special relocation symbols used in the MIPS64 ELF relocation entries
1172 enum {
1173 RSS_UNDEF = 0, // None
1174 RSS_GP = 1, // Value of gp
1175 RSS_GP0 = 2, // Value of gp used to create object being relocated
1176 RSS_LOC = 3 // Address of location being relocated
1177 };
1178
1179 // Relocation entry, without explicit addend.
1180 struct Elf32_Rel {
1181 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
1182 Elf32_Word r_info; // Symbol table index and type of relocation to apply
1183
1184 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1185 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rel1186 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rel1187 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
setSymbolElf32_Rel1188 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rel1189 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rel1190 void setSymbolAndType(Elf32_Word s, unsigned char t) {
1191 r_info = (s << 8) + t;
1192 }
1193 };
1194
1195 // Relocation entry with explicit addend.
1196 struct Elf32_Rela {
1197 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
1198 Elf32_Word r_info; // Symbol table index and type of relocation to apply
1199 Elf32_Sword r_addend; // Compute value for relocatable field by adding this
1200
1201 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1202 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rela1203 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rela1204 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
setSymbolElf32_Rela1205 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rela1206 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rela1207 void setSymbolAndType(Elf32_Word s, unsigned char t) {
1208 r_info = (s << 8) + t;
1209 }
1210 };
1211
1212 // Relocation entry without explicit addend or info (relative relocations only).
1213 typedef Elf32_Word Elf32_Relr; // offset/bitmap for relative relocations
1214
1215 // Relocation entry, without explicit addend.
1216 struct Elf64_Rel {
1217 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
1218 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
1219
1220 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1221 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rel1222 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rel1223 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
setSymbolElf64_Rel1224 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rel1225 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rel1226 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1227 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
1228 }
1229 };
1230
1231 // Relocation entry with explicit addend.
1232 struct Elf64_Rela {
1233 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
1234 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
1235 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this.
1236
1237 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1238 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rela1239 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rela1240 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
setSymbolElf64_Rela1241 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rela1242 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rela1243 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1244 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
1245 }
1246 };
1247
1248 // Relocation entry without explicit addend or info (relative relocations only).
1249 typedef Elf64_Xword Elf64_Relr; // offset/bitmap for relative relocations
1250
1251 // Program header for ELF32.
1252 struct Elf32_Phdr {
1253 Elf32_Word p_type; // Type of segment
1254 Elf32_Off p_offset; // File offset where segment is located, in bytes
1255 Elf32_Addr p_vaddr; // Virtual address of beginning of segment
1256 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
1257 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
1258 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
1259 Elf32_Word p_flags; // Segment flags
1260 Elf32_Word p_align; // Segment alignment constraint
1261 };
1262
1263 // Program header for ELF64.
1264 struct Elf64_Phdr {
1265 Elf64_Word p_type; // Type of segment
1266 Elf64_Word p_flags; // Segment flags
1267 Elf64_Off p_offset; // File offset where segment is located, in bytes
1268 Elf64_Addr p_vaddr; // Virtual address of beginning of segment
1269 Elf64_Addr p_paddr; // Physical addr of beginning of segment (OS-specific)
1270 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero)
1271 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero)
1272 Elf64_Xword p_align; // Segment alignment constraint
1273 };
1274
1275 // Segment types.
1276 enum {
1277 PT_NULL = 0, // Unused segment.
1278 PT_LOAD = 1, // Loadable segment.
1279 PT_DYNAMIC = 2, // Dynamic linking information.
1280 PT_INTERP = 3, // Interpreter pathname.
1281 PT_NOTE = 4, // Auxiliary information.
1282 PT_SHLIB = 5, // Reserved.
1283 PT_PHDR = 6, // The program header table itself.
1284 PT_TLS = 7, // The thread-local storage template.
1285 PT_LOOS = 0x60000000, // Lowest operating system-specific pt entry type.
1286 PT_HIOS = 0x6fffffff, // Highest operating system-specific pt entry type.
1287 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
1288 PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type.
1289
1290 // x86-64 program header types.
1291 // These all contain stack unwind tables.
1292 PT_GNU_EH_FRAME = 0x6474e550,
1293 PT_SUNW_EH_FRAME = 0x6474e550,
1294 PT_SUNW_UNWIND = 0x6464e550,
1295
1296 PT_GNU_STACK = 0x6474e551, // Indicates stack executability.
1297 PT_GNU_RELRO = 0x6474e552, // Read-only after relocation.
1298 PT_GNU_PROPERTY = 0x6474e553, // .note.gnu.property notes sections.
1299
1300 PT_OPENBSD_RANDOMIZE = 0x65a3dbe6, // Fill with random data.
1301 PT_OPENBSD_WXNEEDED = 0x65a3dbe7, // Program does W^X violations.
1302 PT_OPENBSD_BOOTDATA = 0x65a41be6, // Section for boot arguments.
1303
1304 // ARM program header types.
1305 PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info
1306 // These all contain stack unwind tables.
1307 PT_ARM_EXIDX = 0x70000001,
1308 PT_ARM_UNWIND = 0x70000001,
1309
1310 // MIPS program header types.
1311 PT_MIPS_REGINFO = 0x70000000, // Register usage information.
1312 PT_MIPS_RTPROC = 0x70000001, // Runtime procedure table.
1313 PT_MIPS_OPTIONS = 0x70000002, // Options segment.
1314 PT_MIPS_ABIFLAGS = 0x70000003, // Abiflags segment.
1315 };
1316
1317 // Segment flag bits.
1318 enum : unsigned {
1319 PF_X = 1, // Execute
1320 PF_W = 2, // Write
1321 PF_R = 4, // Read
1322 PF_MASKOS = 0x0ff00000, // Bits for operating system-specific semantics.
1323 PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics.
1324 };
1325
1326 // Dynamic table entry for ELF32.
1327 struct Elf32_Dyn {
1328 Elf32_Sword d_tag; // Type of dynamic table entry.
1329 union {
1330 Elf32_Word d_val; // Integer value of entry.
1331 Elf32_Addr d_ptr; // Pointer value of entry.
1332 } d_un;
1333 };
1334
1335 // Dynamic table entry for ELF64.
1336 struct Elf64_Dyn {
1337 Elf64_Sxword d_tag; // Type of dynamic table entry.
1338 union {
1339 Elf64_Xword d_val; // Integer value of entry.
1340 Elf64_Addr d_ptr; // Pointer value of entry.
1341 } d_un;
1342 };
1343
1344 // Dynamic table entry tags.
1345 enum {
1346 #define DYNAMIC_TAG(name, value) DT_##name = value,
1347 #include "DynamicTags.def"
1348 #undef DYNAMIC_TAG
1349 };
1350
1351 // DT_FLAGS values.
1352 enum {
1353 DF_ORIGIN = 0x01, // The object may reference $ORIGIN.
1354 DF_SYMBOLIC = 0x02, // Search the shared lib before searching the exe.
1355 DF_TEXTREL = 0x04, // Relocations may modify a non-writable segment.
1356 DF_BIND_NOW = 0x08, // Process all relocations on load.
1357 DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically.
1358 };
1359
1360 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry.
1361 enum {
1362 DF_1_NOW = 0x00000001, // Set RTLD_NOW for this object.
1363 DF_1_GLOBAL = 0x00000002, // Set RTLD_GLOBAL for this object.
1364 DF_1_GROUP = 0x00000004, // Set RTLD_GROUP for this object.
1365 DF_1_NODELETE = 0x00000008, // Set RTLD_NODELETE for this object.
1366 DF_1_LOADFLTR = 0x00000010, // Trigger filtee loading at runtime.
1367 DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object.
1368 DF_1_NOOPEN = 0x00000040, // Set RTLD_NOOPEN for this object.
1369 DF_1_ORIGIN = 0x00000080, // $ORIGIN must be handled.
1370 DF_1_DIRECT = 0x00000100, // Direct binding enabled.
1371 DF_1_TRANS = 0x00000200,
1372 DF_1_INTERPOSE = 0x00000400, // Object is used to interpose.
1373 DF_1_NODEFLIB = 0x00000800, // Ignore default lib search path.
1374 DF_1_NODUMP = 0x00001000, // Object can't be dldump'ed.
1375 DF_1_CONFALT = 0x00002000, // Configuration alternative created.
1376 DF_1_ENDFILTEE = 0x00004000, // Filtee terminates filters search.
1377 DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time.
1378 DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time.
1379 DF_1_NODIRECT = 0x00020000, // Object has no-direct binding.
1380 DF_1_IGNMULDEF = 0x00040000,
1381 DF_1_NOKSYMS = 0x00080000,
1382 DF_1_NOHDR = 0x00100000,
1383 DF_1_EDITED = 0x00200000, // Object is modified after built.
1384 DF_1_NORELOC = 0x00400000,
1385 DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers.
1386 DF_1_GLOBAUDIT = 0x01000000, // Global auditing required.
1387 DF_1_SINGLETON = 0x02000000, // Singleton symbols are used.
1388 DF_1_PIE = 0x08000000, // Object is a position-independent executable.
1389 };
1390
1391 // DT_MIPS_FLAGS values.
1392 enum {
1393 RHF_NONE = 0x00000000, // No flags.
1394 RHF_QUICKSTART = 0x00000001, // Uses shortcut pointers.
1395 RHF_NOTPOT = 0x00000002, // Hash size is not a power of two.
1396 RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH.
1397 RHF_NO_MOVE = 0x00000008, // DSO address may not be relocated.
1398 RHF_SGI_ONLY = 0x00000010, // SGI specific features.
1399 RHF_GUARANTEE_INIT = 0x00000020, // Guarantee that .init will finish
1400 // executing before any non-init
1401 // code in DSO is called.
1402 RHF_DELTA_C_PLUS_PLUS = 0x00000040, // Contains Delta C++ code.
1403 RHF_GUARANTEE_START_INIT = 0x00000080, // Guarantee that .init will start
1404 // executing before any non-init
1405 // code in DSO is called.
1406 RHF_PIXIE = 0x00000100, // Generated by pixie.
1407 RHF_DEFAULT_DELAY_LOAD = 0x00000200, // Delay-load DSO by default.
1408 RHF_REQUICKSTART = 0x00000400, // Object may be requickstarted
1409 RHF_REQUICKSTARTED = 0x00000800, // Object has been requickstarted
1410 RHF_CORD = 0x00001000, // Generated by cord.
1411 RHF_NO_UNRES_UNDEF = 0x00002000, // Object contains no unresolved
1412 // undef symbols.
1413 RHF_RLD_ORDER_SAFE = 0x00004000 // Symbol table is in a safe order.
1414 };
1415
1416 // ElfXX_VerDef structure version (GNU versioning)
1417 enum { VER_DEF_NONE = 0, VER_DEF_CURRENT = 1 };
1418
1419 // VerDef Flags (ElfXX_VerDef::vd_flags)
1420 enum { VER_FLG_BASE = 0x1, VER_FLG_WEAK = 0x2, VER_FLG_INFO = 0x4 };
1421
1422 // Special constants for the version table. (SHT_GNU_versym/.gnu.version)
1423 enum {
1424 VER_NDX_LOCAL = 0, // Unversioned local symbol
1425 VER_NDX_GLOBAL = 1, // Unversioned global symbol
1426 VERSYM_VERSION = 0x7fff, // Version Index mask
1427 VERSYM_HIDDEN = 0x8000 // Hidden bit (non-default version)
1428 };
1429
1430 // ElfXX_VerNeed structure version (GNU versioning)
1431 enum { VER_NEED_NONE = 0, VER_NEED_CURRENT = 1 };
1432
1433 // SHT_NOTE section types.
1434
1435 // Generic note types.
1436 enum : unsigned {
1437 NT_VERSION = 1,
1438 NT_ARCH = 2,
1439 NT_GNU_BUILD_ATTRIBUTE_OPEN = 0x100,
1440 NT_GNU_BUILD_ATTRIBUTE_FUNC = 0x101,
1441 };
1442
1443 // Core note types.
1444 enum : unsigned {
1445 NT_PRSTATUS = 1,
1446 NT_FPREGSET = 2,
1447 NT_PRPSINFO = 3,
1448 NT_TASKSTRUCT = 4,
1449 NT_AUXV = 6,
1450 NT_PSTATUS = 10,
1451 NT_FPREGS = 12,
1452 NT_PSINFO = 13,
1453 NT_LWPSTATUS = 16,
1454 NT_LWPSINFO = 17,
1455 NT_WIN32PSTATUS = 18,
1456
1457 NT_PPC_VMX = 0x100,
1458 NT_PPC_VSX = 0x102,
1459 NT_PPC_TAR = 0x103,
1460 NT_PPC_PPR = 0x104,
1461 NT_PPC_DSCR = 0x105,
1462 NT_PPC_EBB = 0x106,
1463 NT_PPC_PMU = 0x107,
1464 NT_PPC_TM_CGPR = 0x108,
1465 NT_PPC_TM_CFPR = 0x109,
1466 NT_PPC_TM_CVMX = 0x10a,
1467 NT_PPC_TM_CVSX = 0x10b,
1468 NT_PPC_TM_SPR = 0x10c,
1469 NT_PPC_TM_CTAR = 0x10d,
1470 NT_PPC_TM_CPPR = 0x10e,
1471 NT_PPC_TM_CDSCR = 0x10f,
1472
1473 NT_386_TLS = 0x200,
1474 NT_386_IOPERM = 0x201,
1475 NT_X86_XSTATE = 0x202,
1476
1477 NT_S390_HIGH_GPRS = 0x300,
1478 NT_S390_TIMER = 0x301,
1479 NT_S390_TODCMP = 0x302,
1480 NT_S390_TODPREG = 0x303,
1481 NT_S390_CTRS = 0x304,
1482 NT_S390_PREFIX = 0x305,
1483 NT_S390_LAST_BREAK = 0x306,
1484 NT_S390_SYSTEM_CALL = 0x307,
1485 NT_S390_TDB = 0x308,
1486 NT_S390_VXRS_LOW = 0x309,
1487 NT_S390_VXRS_HIGH = 0x30a,
1488 NT_S390_GS_CB = 0x30b,
1489 NT_S390_GS_BC = 0x30c,
1490
1491 NT_ARM_VFP = 0x400,
1492 NT_ARM_TLS = 0x401,
1493 NT_ARM_HW_BREAK = 0x402,
1494 NT_ARM_HW_WATCH = 0x403,
1495 NT_ARM_SVE = 0x405,
1496 NT_ARM_PAC_MASK = 0x406,
1497
1498 NT_FILE = 0x46494c45,
1499 NT_PRXFPREG = 0x46e62b7f,
1500 NT_SIGINFO = 0x53494749,
1501 };
1502
1503 // LLVM-specific notes.
1504 enum {
1505 NT_LLVM_HWASAN_GLOBALS = 3,
1506 };
1507
1508 // GNU note types.
1509 enum {
1510 NT_GNU_ABI_TAG = 1,
1511 NT_GNU_HWCAP = 2,
1512 NT_GNU_BUILD_ID = 3,
1513 NT_GNU_GOLD_VERSION = 4,
1514 NT_GNU_PROPERTY_TYPE_0 = 5,
1515 };
1516
1517 // Property types used in GNU_PROPERTY_TYPE_0 notes.
1518 enum : unsigned {
1519 GNU_PROPERTY_STACK_SIZE = 1,
1520 GNU_PROPERTY_NO_COPY_ON_PROTECTED = 2,
1521 GNU_PROPERTY_AARCH64_FEATURE_1_AND = 0xc0000000,
1522 GNU_PROPERTY_X86_FEATURE_1_AND = 0xc0000002,
1523
1524 GNU_PROPERTY_X86_UINT32_OR_LO = 0xc0008000,
1525 GNU_PROPERTY_X86_FEATURE_2_NEEDED = GNU_PROPERTY_X86_UINT32_OR_LO + 1,
1526 GNU_PROPERTY_X86_ISA_1_NEEDED = GNU_PROPERTY_X86_UINT32_OR_LO + 2,
1527
1528 GNU_PROPERTY_X86_UINT32_OR_AND_LO = 0xc0010000,
1529 GNU_PROPERTY_X86_FEATURE_2_USED = GNU_PROPERTY_X86_UINT32_OR_AND_LO + 1,
1530 GNU_PROPERTY_X86_ISA_1_USED = GNU_PROPERTY_X86_UINT32_OR_AND_LO + 2,
1531 };
1532
1533 // aarch64 processor feature bits.
1534 enum : unsigned {
1535 GNU_PROPERTY_AARCH64_FEATURE_1_BTI = 1 << 0,
1536 GNU_PROPERTY_AARCH64_FEATURE_1_PAC = 1 << 1,
1537 };
1538
1539 // x86 processor feature bits.
1540 enum : unsigned {
1541 GNU_PROPERTY_X86_FEATURE_1_IBT = 1 << 0,
1542 GNU_PROPERTY_X86_FEATURE_1_SHSTK = 1 << 1,
1543
1544 GNU_PROPERTY_X86_FEATURE_2_X86 = 1 << 0,
1545 GNU_PROPERTY_X86_FEATURE_2_X87 = 1 << 1,
1546 GNU_PROPERTY_X86_FEATURE_2_MMX = 1 << 2,
1547 GNU_PROPERTY_X86_FEATURE_2_XMM = 1 << 3,
1548 GNU_PROPERTY_X86_FEATURE_2_YMM = 1 << 4,
1549 GNU_PROPERTY_X86_FEATURE_2_ZMM = 1 << 5,
1550 GNU_PROPERTY_X86_FEATURE_2_FXSR = 1 << 6,
1551 GNU_PROPERTY_X86_FEATURE_2_XSAVE = 1 << 7,
1552 GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT = 1 << 8,
1553 GNU_PROPERTY_X86_FEATURE_2_XSAVEC = 1 << 9,
1554
1555 GNU_PROPERTY_X86_ISA_1_BASELINE = 1 << 0,
1556 GNU_PROPERTY_X86_ISA_1_V2 = 1 << 1,
1557 GNU_PROPERTY_X86_ISA_1_V3 = 1 << 2,
1558 GNU_PROPERTY_X86_ISA_1_V4 = 1 << 3,
1559 };
1560
1561 // FreeBSD note types.
1562 enum {
1563 NT_FREEBSD_ABI_TAG = 1,
1564 NT_FREEBSD_NOINIT_TAG = 2,
1565 NT_FREEBSD_ARCH_TAG = 3,
1566 NT_FREEBSD_FEATURE_CTL = 4,
1567 };
1568
1569 // NT_FREEBSD_FEATURE_CTL values (see FreeBSD's sys/sys/elf_common.h).
1570 enum {
1571 NT_FREEBSD_FCTL_ASLR_DISABLE = 0x00000001,
1572 NT_FREEBSD_FCTL_PROTMAX_DISABLE = 0x00000002,
1573 NT_FREEBSD_FCTL_STKGAP_DISABLE = 0x00000004,
1574 NT_FREEBSD_FCTL_WXNEEDED = 0x00000008,
1575 NT_FREEBSD_FCTL_LA48 = 0x00000010,
1576 NT_FREEBSD_FCTL_ASG_DISABLE = 0x00000020,
1577 };
1578
1579 // FreeBSD core note types.
1580 enum {
1581 NT_FREEBSD_THRMISC = 7,
1582 NT_FREEBSD_PROCSTAT_PROC = 8,
1583 NT_FREEBSD_PROCSTAT_FILES = 9,
1584 NT_FREEBSD_PROCSTAT_VMMAP = 10,
1585 NT_FREEBSD_PROCSTAT_GROUPS = 11,
1586 NT_FREEBSD_PROCSTAT_UMASK = 12,
1587 NT_FREEBSD_PROCSTAT_RLIMIT = 13,
1588 NT_FREEBSD_PROCSTAT_OSREL = 14,
1589 NT_FREEBSD_PROCSTAT_PSSTRINGS = 15,
1590 NT_FREEBSD_PROCSTAT_AUXV = 16,
1591 };
1592
1593 // AMDGPU-specific section indices.
1594 enum {
1595 SHN_AMDGPU_LDS = 0xff00, // Variable in LDS; symbol encoded like SHN_COMMON
1596 };
1597
1598 // AMD vendor specific notes. (Code Object V2)
1599 enum {
1600 NT_AMD_HSA_CODE_OBJECT_VERSION = 1,
1601 NT_AMD_HSA_HSAIL = 2,
1602 NT_AMD_HSA_ISA_VERSION = 3,
1603 // Note types with values between 4 and 9 (inclusive) are reserved.
1604 NT_AMD_HSA_METADATA = 10,
1605 NT_AMD_HSA_ISA_NAME = 11,
1606 NT_AMD_PAL_METADATA = 12
1607 };
1608
1609 // AMDGPU vendor specific notes. (Code Object V3)
1610 enum {
1611 // Note types with values between 0 and 31 (inclusive) are reserved.
1612 NT_AMDGPU_METADATA = 32
1613 };
1614
1615 enum {
1616 GNU_ABI_TAG_LINUX = 0,
1617 GNU_ABI_TAG_HURD = 1,
1618 GNU_ABI_TAG_SOLARIS = 2,
1619 GNU_ABI_TAG_FREEBSD = 3,
1620 GNU_ABI_TAG_NETBSD = 4,
1621 GNU_ABI_TAG_SYLLABLE = 5,
1622 GNU_ABI_TAG_NACL = 6,
1623 };
1624
1625 constexpr const char *ELF_NOTE_GNU = "GNU";
1626
1627 // Android packed relocation group flags.
1628 enum {
1629 RELOCATION_GROUPED_BY_INFO_FLAG = 1,
1630 RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG = 2,
1631 RELOCATION_GROUPED_BY_ADDEND_FLAG = 4,
1632 RELOCATION_GROUP_HAS_ADDEND_FLAG = 8,
1633 };
1634
1635 // Compressed section header for ELF32.
1636 struct Elf32_Chdr {
1637 Elf32_Word ch_type;
1638 Elf32_Word ch_size;
1639 Elf32_Word ch_addralign;
1640 };
1641
1642 // Compressed section header for ELF64.
1643 struct Elf64_Chdr {
1644 Elf64_Word ch_type;
1645 Elf64_Word ch_reserved;
1646 Elf64_Xword ch_size;
1647 Elf64_Xword ch_addralign;
1648 };
1649
1650 // Node header for ELF32.
1651 struct Elf32_Nhdr {
1652 Elf32_Word n_namesz;
1653 Elf32_Word n_descsz;
1654 Elf32_Word n_type;
1655 };
1656
1657 // Node header for ELF64.
1658 struct Elf64_Nhdr {
1659 Elf64_Word n_namesz;
1660 Elf64_Word n_descsz;
1661 Elf64_Word n_type;
1662 };
1663
1664 // Legal values for ch_type field of compressed section header.
1665 enum {
1666 ELFCOMPRESS_ZLIB = 1, // ZLIB/DEFLATE algorithm.
1667 ELFCOMPRESS_LOOS = 0x60000000, // Start of OS-specific.
1668 ELFCOMPRESS_HIOS = 0x6fffffff, // End of OS-specific.
1669 ELFCOMPRESS_LOPROC = 0x70000000, // Start of processor-specific.
1670 ELFCOMPRESS_HIPROC = 0x7fffffff // End of processor-specific.
1671 };
1672
1673 } // end namespace ELF
1674 } // end namespace llvm
1675
1676 #endif // LLVM_BINARYFORMAT_ELF_H
1677